1c66ac9dbSNicholas Bellinger /******************************************************************************* 2c66ac9dbSNicholas Bellinger * Filename: target_core_pr.c 3c66ac9dbSNicholas Bellinger * 4c66ac9dbSNicholas Bellinger * This file contains SPC-3 compliant persistent reservations and 5c66ac9dbSNicholas Bellinger * legacy SPC-2 reservations with compatible reservation handling (CRH=1) 6c66ac9dbSNicholas Bellinger * 7c66ac9dbSNicholas Bellinger * Copyright (c) 2009, 2010 Rising Tide Systems 8c66ac9dbSNicholas Bellinger * Copyright (c) 2009, 2010 Linux-iSCSI.org 9c66ac9dbSNicholas Bellinger * 10c66ac9dbSNicholas Bellinger * Nicholas A. Bellinger <nab@kernel.org> 11c66ac9dbSNicholas Bellinger * 12c66ac9dbSNicholas Bellinger * This program is free software; you can redistribute it and/or modify 13c66ac9dbSNicholas Bellinger * it under the terms of the GNU General Public License as published by 14c66ac9dbSNicholas Bellinger * the Free Software Foundation; either version 2 of the License, or 15c66ac9dbSNicholas Bellinger * (at your option) any later version. 16c66ac9dbSNicholas Bellinger * 17c66ac9dbSNicholas Bellinger * This program is distributed in the hope that it will be useful, 18c66ac9dbSNicholas Bellinger * but WITHOUT ANY WARRANTY; without even the implied warranty of 19c66ac9dbSNicholas Bellinger * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 20c66ac9dbSNicholas Bellinger * GNU General Public License for more details. 21c66ac9dbSNicholas Bellinger * 22c66ac9dbSNicholas Bellinger * You should have received a copy of the GNU General Public License 23c66ac9dbSNicholas Bellinger * along with this program; if not, write to the Free Software 24c66ac9dbSNicholas Bellinger * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. 25c66ac9dbSNicholas Bellinger * 26c66ac9dbSNicholas Bellinger ******************************************************************************/ 27c66ac9dbSNicholas Bellinger 28c66ac9dbSNicholas Bellinger #include <linux/version.h> 29c66ac9dbSNicholas Bellinger #include <linux/slab.h> 30c66ac9dbSNicholas Bellinger #include <linux/spinlock.h> 31c66ac9dbSNicholas Bellinger #include <linux/list.h> 32c66ac9dbSNicholas Bellinger #include <scsi/scsi.h> 33c66ac9dbSNicholas Bellinger #include <scsi/scsi_cmnd.h> 34c66ac9dbSNicholas Bellinger #include <asm/unaligned.h> 35c66ac9dbSNicholas Bellinger 36c66ac9dbSNicholas Bellinger #include <target/target_core_base.h> 37c66ac9dbSNicholas Bellinger #include <target/target_core_device.h> 38c66ac9dbSNicholas Bellinger #include <target/target_core_tmr.h> 39c66ac9dbSNicholas Bellinger #include <target/target_core_tpg.h> 40c66ac9dbSNicholas Bellinger #include <target/target_core_transport.h> 41c66ac9dbSNicholas Bellinger #include <target/target_core_fabric_ops.h> 42c66ac9dbSNicholas Bellinger #include <target/target_core_configfs.h> 43c66ac9dbSNicholas Bellinger 44c66ac9dbSNicholas Bellinger #include "target_core_hba.h" 45c66ac9dbSNicholas Bellinger #include "target_core_pr.h" 46c66ac9dbSNicholas Bellinger #include "target_core_ua.h" 47c66ac9dbSNicholas Bellinger 48c66ac9dbSNicholas Bellinger /* 49c66ac9dbSNicholas Bellinger * Used for Specify Initiator Ports Capable Bit (SPEC_I_PT) 50c66ac9dbSNicholas Bellinger */ 51c66ac9dbSNicholas Bellinger struct pr_transport_id_holder { 52c66ac9dbSNicholas Bellinger int dest_local_nexus; 53c66ac9dbSNicholas Bellinger struct t10_pr_registration *dest_pr_reg; 54c66ac9dbSNicholas Bellinger struct se_portal_group *dest_tpg; 55c66ac9dbSNicholas Bellinger struct se_node_acl *dest_node_acl; 56c66ac9dbSNicholas Bellinger struct se_dev_entry *dest_se_deve; 57c66ac9dbSNicholas Bellinger struct list_head dest_list; 58c66ac9dbSNicholas Bellinger }; 59c66ac9dbSNicholas Bellinger 60c66ac9dbSNicholas Bellinger int core_pr_dump_initiator_port( 61c66ac9dbSNicholas Bellinger struct t10_pr_registration *pr_reg, 62c66ac9dbSNicholas Bellinger char *buf, 63c66ac9dbSNicholas Bellinger u32 size) 64c66ac9dbSNicholas Bellinger { 65c66ac9dbSNicholas Bellinger if (!(pr_reg->isid_present_at_reg)) 66c66ac9dbSNicholas Bellinger return 0; 67c66ac9dbSNicholas Bellinger 68c66ac9dbSNicholas Bellinger snprintf(buf, size, ",i,0x%s", &pr_reg->pr_reg_isid[0]); 69c66ac9dbSNicholas Bellinger return 1; 70c66ac9dbSNicholas Bellinger } 71c66ac9dbSNicholas Bellinger 72c66ac9dbSNicholas Bellinger static void __core_scsi3_complete_pro_release(struct se_device *, struct se_node_acl *, 73c66ac9dbSNicholas Bellinger struct t10_pr_registration *, int); 74c66ac9dbSNicholas Bellinger 75c66ac9dbSNicholas Bellinger static int core_scsi2_reservation_seq_non_holder( 76c66ac9dbSNicholas Bellinger struct se_cmd *cmd, 77c66ac9dbSNicholas Bellinger unsigned char *cdb, 78c66ac9dbSNicholas Bellinger u32 pr_reg_type) 79c66ac9dbSNicholas Bellinger { 80c66ac9dbSNicholas Bellinger switch (cdb[0]) { 81c66ac9dbSNicholas Bellinger case INQUIRY: 82c66ac9dbSNicholas Bellinger case RELEASE: 83c66ac9dbSNicholas Bellinger case RELEASE_10: 84c66ac9dbSNicholas Bellinger return 0; 85c66ac9dbSNicholas Bellinger default: 86c66ac9dbSNicholas Bellinger return 1; 87c66ac9dbSNicholas Bellinger } 88c66ac9dbSNicholas Bellinger 89c66ac9dbSNicholas Bellinger return 1; 90c66ac9dbSNicholas Bellinger } 91c66ac9dbSNicholas Bellinger 92c66ac9dbSNicholas Bellinger static int core_scsi2_reservation_check(struct se_cmd *cmd, u32 *pr_reg_type) 93c66ac9dbSNicholas Bellinger { 94c66ac9dbSNicholas Bellinger struct se_device *dev = cmd->se_dev; 95c66ac9dbSNicholas Bellinger struct se_session *sess = cmd->se_sess; 96c66ac9dbSNicholas Bellinger int ret; 97c66ac9dbSNicholas Bellinger 98c66ac9dbSNicholas Bellinger if (!(sess)) 99c66ac9dbSNicholas Bellinger return 0; 100c66ac9dbSNicholas Bellinger 101c66ac9dbSNicholas Bellinger spin_lock(&dev->dev_reservation_lock); 102c66ac9dbSNicholas Bellinger if (!dev->dev_reserved_node_acl || !sess) { 103c66ac9dbSNicholas Bellinger spin_unlock(&dev->dev_reservation_lock); 104c66ac9dbSNicholas Bellinger return 0; 105c66ac9dbSNicholas Bellinger } 106c66ac9dbSNicholas Bellinger if (dev->dev_reserved_node_acl != sess->se_node_acl) { 107c66ac9dbSNicholas Bellinger spin_unlock(&dev->dev_reservation_lock); 108e3d6f909SAndy Grover return -EINVAL; 109c66ac9dbSNicholas Bellinger } 110c66ac9dbSNicholas Bellinger if (!(dev->dev_flags & DF_SPC2_RESERVATIONS_WITH_ISID)) { 111c66ac9dbSNicholas Bellinger spin_unlock(&dev->dev_reservation_lock); 112c66ac9dbSNicholas Bellinger return 0; 113c66ac9dbSNicholas Bellinger } 114e3d6f909SAndy Grover ret = (dev->dev_res_bin_isid == sess->sess_bin_isid) ? 0 : -EINVAL; 115c66ac9dbSNicholas Bellinger spin_unlock(&dev->dev_reservation_lock); 116c66ac9dbSNicholas Bellinger 117c66ac9dbSNicholas Bellinger return ret; 118c66ac9dbSNicholas Bellinger } 119c66ac9dbSNicholas Bellinger 120c66ac9dbSNicholas Bellinger static int core_scsi2_reservation_release(struct se_cmd *cmd) 121c66ac9dbSNicholas Bellinger { 122c66ac9dbSNicholas Bellinger struct se_device *dev = cmd->se_dev; 123c66ac9dbSNicholas Bellinger struct se_session *sess = cmd->se_sess; 124c66ac9dbSNicholas Bellinger struct se_portal_group *tpg = sess->se_tpg; 125c66ac9dbSNicholas Bellinger 126c66ac9dbSNicholas Bellinger if (!(sess) || !(tpg)) 127c66ac9dbSNicholas Bellinger return 0; 128c66ac9dbSNicholas Bellinger 129c66ac9dbSNicholas Bellinger spin_lock(&dev->dev_reservation_lock); 130c66ac9dbSNicholas Bellinger if (!dev->dev_reserved_node_acl || !sess) { 131c66ac9dbSNicholas Bellinger spin_unlock(&dev->dev_reservation_lock); 132c66ac9dbSNicholas Bellinger return 0; 133c66ac9dbSNicholas Bellinger } 134c66ac9dbSNicholas Bellinger 135c66ac9dbSNicholas Bellinger if (dev->dev_reserved_node_acl != sess->se_node_acl) { 136c66ac9dbSNicholas Bellinger spin_unlock(&dev->dev_reservation_lock); 137c66ac9dbSNicholas Bellinger return 0; 138c66ac9dbSNicholas Bellinger } 139c66ac9dbSNicholas Bellinger dev->dev_reserved_node_acl = NULL; 140c66ac9dbSNicholas Bellinger dev->dev_flags &= ~DF_SPC2_RESERVATIONS; 141c66ac9dbSNicholas Bellinger if (dev->dev_flags & DF_SPC2_RESERVATIONS_WITH_ISID) { 142c66ac9dbSNicholas Bellinger dev->dev_res_bin_isid = 0; 143c66ac9dbSNicholas Bellinger dev->dev_flags &= ~DF_SPC2_RESERVATIONS_WITH_ISID; 144c66ac9dbSNicholas Bellinger } 145c66ac9dbSNicholas Bellinger printk(KERN_INFO "SCSI-2 Released reservation for %s LUN: %u ->" 146e3d6f909SAndy Grover " MAPPED LUN: %u for %s\n", tpg->se_tpg_tfo->get_fabric_name(), 147e3d6f909SAndy Grover cmd->se_lun->unpacked_lun, cmd->se_deve->mapped_lun, 148c66ac9dbSNicholas Bellinger sess->se_node_acl->initiatorname); 149c66ac9dbSNicholas Bellinger spin_unlock(&dev->dev_reservation_lock); 150c66ac9dbSNicholas Bellinger 151c66ac9dbSNicholas Bellinger return 0; 152c66ac9dbSNicholas Bellinger } 153c66ac9dbSNicholas Bellinger 154c66ac9dbSNicholas Bellinger static int core_scsi2_reservation_reserve(struct se_cmd *cmd) 155c66ac9dbSNicholas Bellinger { 156c66ac9dbSNicholas Bellinger struct se_device *dev = cmd->se_dev; 157c66ac9dbSNicholas Bellinger struct se_session *sess = cmd->se_sess; 158c66ac9dbSNicholas Bellinger struct se_portal_group *tpg = sess->se_tpg; 159c66ac9dbSNicholas Bellinger 160a1d8b49aSAndy Grover if ((cmd->t_task_cdb[1] & 0x01) && 161a1d8b49aSAndy Grover (cmd->t_task_cdb[1] & 0x02)) { 162c66ac9dbSNicholas Bellinger printk(KERN_ERR "LongIO and Obselete Bits set, returning" 163c66ac9dbSNicholas Bellinger " ILLEGAL_REQUEST\n"); 164c66ac9dbSNicholas Bellinger return PYX_TRANSPORT_ILLEGAL_REQUEST; 165c66ac9dbSNicholas Bellinger } 166c66ac9dbSNicholas Bellinger /* 167c66ac9dbSNicholas Bellinger * This is currently the case for target_core_mod passthrough struct se_cmd 168c66ac9dbSNicholas Bellinger * ops 169c66ac9dbSNicholas Bellinger */ 170c66ac9dbSNicholas Bellinger if (!(sess) || !(tpg)) 171c66ac9dbSNicholas Bellinger return 0; 172c66ac9dbSNicholas Bellinger 173c66ac9dbSNicholas Bellinger spin_lock(&dev->dev_reservation_lock); 174c66ac9dbSNicholas Bellinger if (dev->dev_reserved_node_acl && 175c66ac9dbSNicholas Bellinger (dev->dev_reserved_node_acl != sess->se_node_acl)) { 176c66ac9dbSNicholas Bellinger printk(KERN_ERR "SCSI-2 RESERVATION CONFLIFT for %s fabric\n", 177e3d6f909SAndy Grover tpg->se_tpg_tfo->get_fabric_name()); 178c66ac9dbSNicholas Bellinger printk(KERN_ERR "Original reserver LUN: %u %s\n", 179e3d6f909SAndy Grover cmd->se_lun->unpacked_lun, 180c66ac9dbSNicholas Bellinger dev->dev_reserved_node_acl->initiatorname); 181c66ac9dbSNicholas Bellinger printk(KERN_ERR "Current attempt - LUN: %u -> MAPPED LUN: %u" 182e3d6f909SAndy Grover " from %s \n", cmd->se_lun->unpacked_lun, 183c66ac9dbSNicholas Bellinger cmd->se_deve->mapped_lun, 184c66ac9dbSNicholas Bellinger sess->se_node_acl->initiatorname); 185c66ac9dbSNicholas Bellinger spin_unlock(&dev->dev_reservation_lock); 186c66ac9dbSNicholas Bellinger return PYX_TRANSPORT_RESERVATION_CONFLICT; 187c66ac9dbSNicholas Bellinger } 188c66ac9dbSNicholas Bellinger 189c66ac9dbSNicholas Bellinger dev->dev_reserved_node_acl = sess->se_node_acl; 190c66ac9dbSNicholas Bellinger dev->dev_flags |= DF_SPC2_RESERVATIONS; 191c66ac9dbSNicholas Bellinger if (sess->sess_bin_isid != 0) { 192c66ac9dbSNicholas Bellinger dev->dev_res_bin_isid = sess->sess_bin_isid; 193c66ac9dbSNicholas Bellinger dev->dev_flags |= DF_SPC2_RESERVATIONS_WITH_ISID; 194c66ac9dbSNicholas Bellinger } 195c66ac9dbSNicholas Bellinger printk(KERN_INFO "SCSI-2 Reserved %s LUN: %u -> MAPPED LUN: %u" 196e3d6f909SAndy Grover " for %s\n", tpg->se_tpg_tfo->get_fabric_name(), 197e3d6f909SAndy Grover cmd->se_lun->unpacked_lun, cmd->se_deve->mapped_lun, 198c66ac9dbSNicholas Bellinger sess->se_node_acl->initiatorname); 199c66ac9dbSNicholas Bellinger spin_unlock(&dev->dev_reservation_lock); 200c66ac9dbSNicholas Bellinger 201c66ac9dbSNicholas Bellinger return 0; 202c66ac9dbSNicholas Bellinger } 203c66ac9dbSNicholas Bellinger 204c66ac9dbSNicholas Bellinger static struct t10_pr_registration *core_scsi3_locate_pr_reg(struct se_device *, 205c66ac9dbSNicholas Bellinger struct se_node_acl *, struct se_session *); 206c66ac9dbSNicholas Bellinger static void core_scsi3_put_pr_reg(struct t10_pr_registration *); 207c66ac9dbSNicholas Bellinger 208c66ac9dbSNicholas Bellinger /* 209c66ac9dbSNicholas Bellinger * Setup in target_core_transport.c:transport_generic_cmd_sequencer() 210c66ac9dbSNicholas Bellinger * and called via struct se_cmd->transport_emulate_cdb() in TCM processing 211c66ac9dbSNicholas Bellinger * thread context. 212c66ac9dbSNicholas Bellinger */ 213c66ac9dbSNicholas Bellinger int core_scsi2_emulate_crh(struct se_cmd *cmd) 214c66ac9dbSNicholas Bellinger { 215c66ac9dbSNicholas Bellinger struct se_session *se_sess = cmd->se_sess; 216c66ac9dbSNicholas Bellinger struct se_subsystem_dev *su_dev = cmd->se_dev->se_sub_dev; 217c66ac9dbSNicholas Bellinger struct t10_pr_registration *pr_reg; 218e3d6f909SAndy Grover struct t10_reservation *pr_tmpl = &su_dev->t10_pr; 219a1d8b49aSAndy Grover unsigned char *cdb = &cmd->t_task_cdb[0]; 220e3d6f909SAndy Grover int crh = (su_dev->t10_pr.res_type == SPC3_PERSISTENT_RESERVATIONS); 221c66ac9dbSNicholas Bellinger int conflict = 0; 222c66ac9dbSNicholas Bellinger 223c66ac9dbSNicholas Bellinger if (!(se_sess)) 224c66ac9dbSNicholas Bellinger return 0; 225c66ac9dbSNicholas Bellinger 226c66ac9dbSNicholas Bellinger if (!(crh)) 227c66ac9dbSNicholas Bellinger goto after_crh; 228c66ac9dbSNicholas Bellinger 229c66ac9dbSNicholas Bellinger pr_reg = core_scsi3_locate_pr_reg(cmd->se_dev, se_sess->se_node_acl, 230c66ac9dbSNicholas Bellinger se_sess); 231c66ac9dbSNicholas Bellinger if (pr_reg) { 232c66ac9dbSNicholas Bellinger /* 233c66ac9dbSNicholas Bellinger * From spc4r17 5.7.3 Exceptions to SPC-2 RESERVE and RELEASE 234c66ac9dbSNicholas Bellinger * behavior 235c66ac9dbSNicholas Bellinger * 236c66ac9dbSNicholas Bellinger * A RESERVE(6) or RESERVE(10) command shall complete with GOOD 237c66ac9dbSNicholas Bellinger * status, but no reservation shall be established and the 238c66ac9dbSNicholas Bellinger * persistent reservation shall not be changed, if the command 239c66ac9dbSNicholas Bellinger * is received from a) and b) below. 240c66ac9dbSNicholas Bellinger * 241c66ac9dbSNicholas Bellinger * A RELEASE(6) or RELEASE(10) command shall complete with GOOD 242c66ac9dbSNicholas Bellinger * status, but the persistent reservation shall not be released, 243c66ac9dbSNicholas Bellinger * if the command is received from a) and b) 244c66ac9dbSNicholas Bellinger * 245c66ac9dbSNicholas Bellinger * a) An I_T nexus that is a persistent reservation holder; or 246c66ac9dbSNicholas Bellinger * b) An I_T nexus that is registered if a registrants only or 247c66ac9dbSNicholas Bellinger * all registrants type persistent reservation is present. 248c66ac9dbSNicholas Bellinger * 249c66ac9dbSNicholas Bellinger * In all other cases, a RESERVE(6) command, RESERVE(10) command, 250c66ac9dbSNicholas Bellinger * RELEASE(6) command, or RELEASE(10) command shall be processed 251c66ac9dbSNicholas Bellinger * as defined in SPC-2. 252c66ac9dbSNicholas Bellinger */ 253c66ac9dbSNicholas Bellinger if (pr_reg->pr_res_holder) { 254c66ac9dbSNicholas Bellinger core_scsi3_put_pr_reg(pr_reg); 255c66ac9dbSNicholas Bellinger return 0; 256c66ac9dbSNicholas Bellinger } 257c66ac9dbSNicholas Bellinger if ((pr_reg->pr_res_type == PR_TYPE_WRITE_EXCLUSIVE_REGONLY) || 258c66ac9dbSNicholas Bellinger (pr_reg->pr_res_type == PR_TYPE_EXCLUSIVE_ACCESS_REGONLY) || 259c66ac9dbSNicholas Bellinger (pr_reg->pr_res_type == PR_TYPE_WRITE_EXCLUSIVE_ALLREG) || 260c66ac9dbSNicholas Bellinger (pr_reg->pr_res_type == PR_TYPE_EXCLUSIVE_ACCESS_ALLREG)) { 261c66ac9dbSNicholas Bellinger core_scsi3_put_pr_reg(pr_reg); 262c66ac9dbSNicholas Bellinger return 0; 263c66ac9dbSNicholas Bellinger } 264c66ac9dbSNicholas Bellinger core_scsi3_put_pr_reg(pr_reg); 265c66ac9dbSNicholas Bellinger conflict = 1; 266c66ac9dbSNicholas Bellinger } else { 267c66ac9dbSNicholas Bellinger /* 268c66ac9dbSNicholas Bellinger * Following spc2r20 5.5.1 Reservations overview: 269c66ac9dbSNicholas Bellinger * 270c66ac9dbSNicholas Bellinger * If a logical unit has executed a PERSISTENT RESERVE OUT 271c66ac9dbSNicholas Bellinger * command with the REGISTER or the REGISTER AND IGNORE 272c66ac9dbSNicholas Bellinger * EXISTING KEY service action and is still registered by any 273c66ac9dbSNicholas Bellinger * initiator, all RESERVE commands and all RELEASE commands 274c66ac9dbSNicholas Bellinger * regardless of initiator shall conflict and shall terminate 275c66ac9dbSNicholas Bellinger * with a RESERVATION CONFLICT status. 276c66ac9dbSNicholas Bellinger */ 277c66ac9dbSNicholas Bellinger spin_lock(&pr_tmpl->registration_lock); 278c66ac9dbSNicholas Bellinger conflict = (list_empty(&pr_tmpl->registration_list)) ? 0 : 1; 279c66ac9dbSNicholas Bellinger spin_unlock(&pr_tmpl->registration_lock); 280c66ac9dbSNicholas Bellinger } 281c66ac9dbSNicholas Bellinger 282c66ac9dbSNicholas Bellinger if (conflict) { 283c66ac9dbSNicholas Bellinger printk(KERN_ERR "Received legacy SPC-2 RESERVE/RELEASE" 284c66ac9dbSNicholas Bellinger " while active SPC-3 registrations exist," 285c66ac9dbSNicholas Bellinger " returning RESERVATION_CONFLICT\n"); 286c66ac9dbSNicholas Bellinger return PYX_TRANSPORT_RESERVATION_CONFLICT; 287c66ac9dbSNicholas Bellinger } 288c66ac9dbSNicholas Bellinger 289c66ac9dbSNicholas Bellinger after_crh: 290c66ac9dbSNicholas Bellinger if ((cdb[0] == RESERVE) || (cdb[0] == RESERVE_10)) 291c66ac9dbSNicholas Bellinger return core_scsi2_reservation_reserve(cmd); 292c66ac9dbSNicholas Bellinger else if ((cdb[0] == RELEASE) || (cdb[0] == RELEASE_10)) 293c66ac9dbSNicholas Bellinger return core_scsi2_reservation_release(cmd); 294c66ac9dbSNicholas Bellinger else 295c66ac9dbSNicholas Bellinger return PYX_TRANSPORT_INVALID_CDB_FIELD; 296c66ac9dbSNicholas Bellinger } 297c66ac9dbSNicholas Bellinger 298c66ac9dbSNicholas Bellinger /* 299c66ac9dbSNicholas Bellinger * Begin SPC-3/SPC-4 Persistent Reservations emulation support 300c66ac9dbSNicholas Bellinger * 301c66ac9dbSNicholas Bellinger * This function is called by those initiator ports who are *NOT* 302c66ac9dbSNicholas Bellinger * the active PR reservation holder when a reservation is present. 303c66ac9dbSNicholas Bellinger */ 304c66ac9dbSNicholas Bellinger static int core_scsi3_pr_seq_non_holder( 305c66ac9dbSNicholas Bellinger struct se_cmd *cmd, 306c66ac9dbSNicholas Bellinger unsigned char *cdb, 307c66ac9dbSNicholas Bellinger u32 pr_reg_type) 308c66ac9dbSNicholas Bellinger { 309c66ac9dbSNicholas Bellinger struct se_dev_entry *se_deve; 310e3d6f909SAndy Grover struct se_session *se_sess = cmd->se_sess; 311c66ac9dbSNicholas Bellinger int other_cdb = 0, ignore_reg; 312c66ac9dbSNicholas Bellinger int registered_nexus = 0, ret = 1; /* Conflict by default */ 313c66ac9dbSNicholas Bellinger int all_reg = 0, reg_only = 0; /* ALL_REG, REG_ONLY */ 314c66ac9dbSNicholas Bellinger int we = 0; /* Write Exclusive */ 315c66ac9dbSNicholas Bellinger int legacy = 0; /* Act like a legacy device and return 316c66ac9dbSNicholas Bellinger * RESERVATION CONFLICT on some CDBs */ 317c66ac9dbSNicholas Bellinger /* 318c66ac9dbSNicholas Bellinger * A legacy SPC-2 reservation is being held. 319c66ac9dbSNicholas Bellinger */ 320c66ac9dbSNicholas Bellinger if (cmd->se_dev->dev_flags & DF_SPC2_RESERVATIONS) 321c66ac9dbSNicholas Bellinger return core_scsi2_reservation_seq_non_holder(cmd, 322c66ac9dbSNicholas Bellinger cdb, pr_reg_type); 323c66ac9dbSNicholas Bellinger 324c66ac9dbSNicholas Bellinger se_deve = &se_sess->se_node_acl->device_list[cmd->orig_fe_lun]; 325c66ac9dbSNicholas Bellinger /* 326c66ac9dbSNicholas Bellinger * Determine if the registration should be ignored due to 327c66ac9dbSNicholas Bellinger * non-matching ISIDs in core_scsi3_pr_reservation_check(). 328c66ac9dbSNicholas Bellinger */ 329c66ac9dbSNicholas Bellinger ignore_reg = (pr_reg_type & 0x80000000); 330c66ac9dbSNicholas Bellinger if (ignore_reg) 331c66ac9dbSNicholas Bellinger pr_reg_type &= ~0x80000000; 332c66ac9dbSNicholas Bellinger 333c66ac9dbSNicholas Bellinger switch (pr_reg_type) { 334c66ac9dbSNicholas Bellinger case PR_TYPE_WRITE_EXCLUSIVE: 335c66ac9dbSNicholas Bellinger we = 1; 336c66ac9dbSNicholas Bellinger case PR_TYPE_EXCLUSIVE_ACCESS: 337c66ac9dbSNicholas Bellinger /* 338c66ac9dbSNicholas Bellinger * Some commands are only allowed for the persistent reservation 339c66ac9dbSNicholas Bellinger * holder. 340c66ac9dbSNicholas Bellinger */ 341c66ac9dbSNicholas Bellinger if ((se_deve->def_pr_registered) && !(ignore_reg)) 342c66ac9dbSNicholas Bellinger registered_nexus = 1; 343c66ac9dbSNicholas Bellinger break; 344c66ac9dbSNicholas Bellinger case PR_TYPE_WRITE_EXCLUSIVE_REGONLY: 345c66ac9dbSNicholas Bellinger we = 1; 346c66ac9dbSNicholas Bellinger case PR_TYPE_EXCLUSIVE_ACCESS_REGONLY: 347c66ac9dbSNicholas Bellinger /* 348c66ac9dbSNicholas Bellinger * Some commands are only allowed for registered I_T Nexuses. 349c66ac9dbSNicholas Bellinger */ 350c66ac9dbSNicholas Bellinger reg_only = 1; 351c66ac9dbSNicholas Bellinger if ((se_deve->def_pr_registered) && !(ignore_reg)) 352c66ac9dbSNicholas Bellinger registered_nexus = 1; 353c66ac9dbSNicholas Bellinger break; 354c66ac9dbSNicholas Bellinger case PR_TYPE_WRITE_EXCLUSIVE_ALLREG: 355c66ac9dbSNicholas Bellinger we = 1; 356c66ac9dbSNicholas Bellinger case PR_TYPE_EXCLUSIVE_ACCESS_ALLREG: 357c66ac9dbSNicholas Bellinger /* 358c66ac9dbSNicholas Bellinger * Each registered I_T Nexus is a reservation holder. 359c66ac9dbSNicholas Bellinger */ 360c66ac9dbSNicholas Bellinger all_reg = 1; 361c66ac9dbSNicholas Bellinger if ((se_deve->def_pr_registered) && !(ignore_reg)) 362c66ac9dbSNicholas Bellinger registered_nexus = 1; 363c66ac9dbSNicholas Bellinger break; 364c66ac9dbSNicholas Bellinger default: 365e3d6f909SAndy Grover return -EINVAL; 366c66ac9dbSNicholas Bellinger } 367c66ac9dbSNicholas Bellinger /* 368c66ac9dbSNicholas Bellinger * Referenced from spc4r17 table 45 for *NON* PR holder access 369c66ac9dbSNicholas Bellinger */ 370c66ac9dbSNicholas Bellinger switch (cdb[0]) { 371c66ac9dbSNicholas Bellinger case SECURITY_PROTOCOL_IN: 372c66ac9dbSNicholas Bellinger if (registered_nexus) 373c66ac9dbSNicholas Bellinger return 0; 374c66ac9dbSNicholas Bellinger ret = (we) ? 0 : 1; 375c66ac9dbSNicholas Bellinger break; 376c66ac9dbSNicholas Bellinger case MODE_SENSE: 377c66ac9dbSNicholas Bellinger case MODE_SENSE_10: 378c66ac9dbSNicholas Bellinger case READ_ATTRIBUTE: 379c66ac9dbSNicholas Bellinger case READ_BUFFER: 380c66ac9dbSNicholas Bellinger case RECEIVE_DIAGNOSTIC: 381c66ac9dbSNicholas Bellinger if (legacy) { 382c66ac9dbSNicholas Bellinger ret = 1; 383c66ac9dbSNicholas Bellinger break; 384c66ac9dbSNicholas Bellinger } 385c66ac9dbSNicholas Bellinger if (registered_nexus) { 386c66ac9dbSNicholas Bellinger ret = 0; 387c66ac9dbSNicholas Bellinger break; 388c66ac9dbSNicholas Bellinger } 389c66ac9dbSNicholas Bellinger ret = (we) ? 0 : 1; /* Allowed Write Exclusive */ 390c66ac9dbSNicholas Bellinger break; 391c66ac9dbSNicholas Bellinger case PERSISTENT_RESERVE_OUT: 392c66ac9dbSNicholas Bellinger /* 393c66ac9dbSNicholas Bellinger * This follows PERSISTENT_RESERVE_OUT service actions that 394c66ac9dbSNicholas Bellinger * are allowed in the presence of various reservations. 395c66ac9dbSNicholas Bellinger * See spc4r17, table 46 396c66ac9dbSNicholas Bellinger */ 397c66ac9dbSNicholas Bellinger switch (cdb[1] & 0x1f) { 398c66ac9dbSNicholas Bellinger case PRO_CLEAR: 399c66ac9dbSNicholas Bellinger case PRO_PREEMPT: 400c66ac9dbSNicholas Bellinger case PRO_PREEMPT_AND_ABORT: 401c66ac9dbSNicholas Bellinger ret = (registered_nexus) ? 0 : 1; 402c66ac9dbSNicholas Bellinger break; 403c66ac9dbSNicholas Bellinger case PRO_REGISTER: 404c66ac9dbSNicholas Bellinger case PRO_REGISTER_AND_IGNORE_EXISTING_KEY: 405c66ac9dbSNicholas Bellinger ret = 0; 406c66ac9dbSNicholas Bellinger break; 407c66ac9dbSNicholas Bellinger case PRO_REGISTER_AND_MOVE: 408c66ac9dbSNicholas Bellinger case PRO_RESERVE: 409c66ac9dbSNicholas Bellinger ret = 1; 410c66ac9dbSNicholas Bellinger break; 411c66ac9dbSNicholas Bellinger case PRO_RELEASE: 412c66ac9dbSNicholas Bellinger ret = (registered_nexus) ? 0 : 1; 413c66ac9dbSNicholas Bellinger break; 414c66ac9dbSNicholas Bellinger default: 415c66ac9dbSNicholas Bellinger printk(KERN_ERR "Unknown PERSISTENT_RESERVE_OUT service" 416c66ac9dbSNicholas Bellinger " action: 0x%02x\n", cdb[1] & 0x1f); 417e3d6f909SAndy Grover return -EINVAL; 418c66ac9dbSNicholas Bellinger } 419c66ac9dbSNicholas Bellinger break; 420c66ac9dbSNicholas Bellinger case RELEASE: 421c66ac9dbSNicholas Bellinger case RELEASE_10: 422c66ac9dbSNicholas Bellinger /* Handled by CRH=1 in core_scsi2_emulate_crh() */ 423c66ac9dbSNicholas Bellinger ret = 0; 424c66ac9dbSNicholas Bellinger break; 425c66ac9dbSNicholas Bellinger case RESERVE: 426c66ac9dbSNicholas Bellinger case RESERVE_10: 427c66ac9dbSNicholas Bellinger /* Handled by CRH=1 in core_scsi2_emulate_crh() */ 428c66ac9dbSNicholas Bellinger ret = 0; 429c66ac9dbSNicholas Bellinger break; 430c66ac9dbSNicholas Bellinger case TEST_UNIT_READY: 431c66ac9dbSNicholas Bellinger ret = (legacy) ? 1 : 0; /* Conflict for legacy */ 432c66ac9dbSNicholas Bellinger break; 433c66ac9dbSNicholas Bellinger case MAINTENANCE_IN: 434c66ac9dbSNicholas Bellinger switch (cdb[1] & 0x1f) { 435c66ac9dbSNicholas Bellinger case MI_MANAGEMENT_PROTOCOL_IN: 436c66ac9dbSNicholas Bellinger if (registered_nexus) { 437c66ac9dbSNicholas Bellinger ret = 0; 438c66ac9dbSNicholas Bellinger break; 439c66ac9dbSNicholas Bellinger } 440c66ac9dbSNicholas Bellinger ret = (we) ? 0 : 1; /* Allowed Write Exclusive */ 441c66ac9dbSNicholas Bellinger break; 442c66ac9dbSNicholas Bellinger case MI_REPORT_SUPPORTED_OPERATION_CODES: 443c66ac9dbSNicholas Bellinger case MI_REPORT_SUPPORTED_TASK_MANAGEMENT_FUNCTIONS: 444c66ac9dbSNicholas Bellinger if (legacy) { 445c66ac9dbSNicholas Bellinger ret = 1; 446c66ac9dbSNicholas Bellinger break; 447c66ac9dbSNicholas Bellinger } 448c66ac9dbSNicholas Bellinger if (registered_nexus) { 449c66ac9dbSNicholas Bellinger ret = 0; 450c66ac9dbSNicholas Bellinger break; 451c66ac9dbSNicholas Bellinger } 452c66ac9dbSNicholas Bellinger ret = (we) ? 0 : 1; /* Allowed Write Exclusive */ 453c66ac9dbSNicholas Bellinger break; 454c66ac9dbSNicholas Bellinger case MI_REPORT_ALIASES: 455c66ac9dbSNicholas Bellinger case MI_REPORT_IDENTIFYING_INFORMATION: 456c66ac9dbSNicholas Bellinger case MI_REPORT_PRIORITY: 457c66ac9dbSNicholas Bellinger case MI_REPORT_TARGET_PGS: 458c66ac9dbSNicholas Bellinger case MI_REPORT_TIMESTAMP: 459c66ac9dbSNicholas Bellinger ret = 0; /* Allowed */ 460c66ac9dbSNicholas Bellinger break; 461c66ac9dbSNicholas Bellinger default: 462c66ac9dbSNicholas Bellinger printk(KERN_ERR "Unknown MI Service Action: 0x%02x\n", 463c66ac9dbSNicholas Bellinger (cdb[1] & 0x1f)); 464e3d6f909SAndy Grover return -EINVAL; 465c66ac9dbSNicholas Bellinger } 466c66ac9dbSNicholas Bellinger break; 467c66ac9dbSNicholas Bellinger case ACCESS_CONTROL_IN: 468c66ac9dbSNicholas Bellinger case ACCESS_CONTROL_OUT: 469c66ac9dbSNicholas Bellinger case INQUIRY: 470c66ac9dbSNicholas Bellinger case LOG_SENSE: 471c66ac9dbSNicholas Bellinger case READ_MEDIA_SERIAL_NUMBER: 472c66ac9dbSNicholas Bellinger case REPORT_LUNS: 473c66ac9dbSNicholas Bellinger case REQUEST_SENSE: 474c66ac9dbSNicholas Bellinger ret = 0; /*/ Allowed CDBs */ 475c66ac9dbSNicholas Bellinger break; 476c66ac9dbSNicholas Bellinger default: 477c66ac9dbSNicholas Bellinger other_cdb = 1; 478c66ac9dbSNicholas Bellinger break; 479c66ac9dbSNicholas Bellinger } 480c66ac9dbSNicholas Bellinger /* 48125985edcSLucas De Marchi * Case where the CDB is explicitly allowed in the above switch 482c66ac9dbSNicholas Bellinger * statement. 483c66ac9dbSNicholas Bellinger */ 484c66ac9dbSNicholas Bellinger if (!(ret) && !(other_cdb)) { 485c66ac9dbSNicholas Bellinger #if 0 486c66ac9dbSNicholas Bellinger printk(KERN_INFO "Allowing explict CDB: 0x%02x for %s" 487c66ac9dbSNicholas Bellinger " reservation holder\n", cdb[0], 488c66ac9dbSNicholas Bellinger core_scsi3_pr_dump_type(pr_reg_type)); 489c66ac9dbSNicholas Bellinger #endif 490c66ac9dbSNicholas Bellinger return ret; 491c66ac9dbSNicholas Bellinger } 492c66ac9dbSNicholas Bellinger /* 493c66ac9dbSNicholas Bellinger * Check if write exclusive initiator ports *NOT* holding the 494c66ac9dbSNicholas Bellinger * WRITE_EXCLUSIVE_* reservation. 495c66ac9dbSNicholas Bellinger */ 496c66ac9dbSNicholas Bellinger if ((we) && !(registered_nexus)) { 497c66ac9dbSNicholas Bellinger if (cmd->data_direction == DMA_TO_DEVICE) { 498c66ac9dbSNicholas Bellinger /* 499c66ac9dbSNicholas Bellinger * Conflict for write exclusive 500c66ac9dbSNicholas Bellinger */ 501c66ac9dbSNicholas Bellinger printk(KERN_INFO "%s Conflict for unregistered nexus" 502c66ac9dbSNicholas Bellinger " %s CDB: 0x%02x to %s reservation\n", 503c66ac9dbSNicholas Bellinger transport_dump_cmd_direction(cmd), 504c66ac9dbSNicholas Bellinger se_sess->se_node_acl->initiatorname, cdb[0], 505c66ac9dbSNicholas Bellinger core_scsi3_pr_dump_type(pr_reg_type)); 506c66ac9dbSNicholas Bellinger return 1; 507c66ac9dbSNicholas Bellinger } else { 508c66ac9dbSNicholas Bellinger /* 509c66ac9dbSNicholas Bellinger * Allow non WRITE CDBs for all Write Exclusive 510c66ac9dbSNicholas Bellinger * PR TYPEs to pass for registered and 511c66ac9dbSNicholas Bellinger * non-registered_nexuxes NOT holding the reservation. 512c66ac9dbSNicholas Bellinger * 513c66ac9dbSNicholas Bellinger * We only make noise for the unregisterd nexuses, 514c66ac9dbSNicholas Bellinger * as we expect registered non-reservation holding 515c66ac9dbSNicholas Bellinger * nexuses to issue CDBs. 516c66ac9dbSNicholas Bellinger */ 517c66ac9dbSNicholas Bellinger #if 0 518c66ac9dbSNicholas Bellinger if (!(registered_nexus)) { 519c66ac9dbSNicholas Bellinger printk(KERN_INFO "Allowing implict CDB: 0x%02x" 520c66ac9dbSNicholas Bellinger " for %s reservation on unregistered" 521c66ac9dbSNicholas Bellinger " nexus\n", cdb[0], 522c66ac9dbSNicholas Bellinger core_scsi3_pr_dump_type(pr_reg_type)); 523c66ac9dbSNicholas Bellinger } 524c66ac9dbSNicholas Bellinger #endif 525c66ac9dbSNicholas Bellinger return 0; 526c66ac9dbSNicholas Bellinger } 527c66ac9dbSNicholas Bellinger } else if ((reg_only) || (all_reg)) { 528c66ac9dbSNicholas Bellinger if (registered_nexus) { 529c66ac9dbSNicholas Bellinger /* 530c66ac9dbSNicholas Bellinger * For PR_*_REG_ONLY and PR_*_ALL_REG reservations, 531c66ac9dbSNicholas Bellinger * allow commands from registered nexuses. 532c66ac9dbSNicholas Bellinger */ 533c66ac9dbSNicholas Bellinger #if 0 534c66ac9dbSNicholas Bellinger printk(KERN_INFO "Allowing implict CDB: 0x%02x for %s" 535c66ac9dbSNicholas Bellinger " reservation\n", cdb[0], 536c66ac9dbSNicholas Bellinger core_scsi3_pr_dump_type(pr_reg_type)); 537c66ac9dbSNicholas Bellinger #endif 538c66ac9dbSNicholas Bellinger return 0; 539c66ac9dbSNicholas Bellinger } 540c66ac9dbSNicholas Bellinger } 541c66ac9dbSNicholas Bellinger printk(KERN_INFO "%s Conflict for %sregistered nexus %s CDB: 0x%2x" 542c66ac9dbSNicholas Bellinger " for %s reservation\n", transport_dump_cmd_direction(cmd), 543c66ac9dbSNicholas Bellinger (registered_nexus) ? "" : "un", 544c66ac9dbSNicholas Bellinger se_sess->se_node_acl->initiatorname, cdb[0], 545c66ac9dbSNicholas Bellinger core_scsi3_pr_dump_type(pr_reg_type)); 546c66ac9dbSNicholas Bellinger 547c66ac9dbSNicholas Bellinger return 1; /* Conflict by default */ 548c66ac9dbSNicholas Bellinger } 549c66ac9dbSNicholas Bellinger 550c66ac9dbSNicholas Bellinger static u32 core_scsi3_pr_generation(struct se_device *dev) 551c66ac9dbSNicholas Bellinger { 552e3d6f909SAndy Grover struct se_subsystem_dev *su_dev = dev->se_sub_dev; 553c66ac9dbSNicholas Bellinger u32 prg; 554c66ac9dbSNicholas Bellinger /* 555c66ac9dbSNicholas Bellinger * PRGeneration field shall contain the value of a 32-bit wrapping 556c66ac9dbSNicholas Bellinger * counter mainted by the device server. 557c66ac9dbSNicholas Bellinger * 558c66ac9dbSNicholas Bellinger * Note that this is done regardless of Active Persist across 559c66ac9dbSNicholas Bellinger * Target PowerLoss (APTPL) 560c66ac9dbSNicholas Bellinger * 561c66ac9dbSNicholas Bellinger * See spc4r17 section 6.3.12 READ_KEYS service action 562c66ac9dbSNicholas Bellinger */ 563c66ac9dbSNicholas Bellinger spin_lock(&dev->dev_reservation_lock); 564e3d6f909SAndy Grover prg = su_dev->t10_pr.pr_generation++; 565c66ac9dbSNicholas Bellinger spin_unlock(&dev->dev_reservation_lock); 566c66ac9dbSNicholas Bellinger 567c66ac9dbSNicholas Bellinger return prg; 568c66ac9dbSNicholas Bellinger } 569c66ac9dbSNicholas Bellinger 570c66ac9dbSNicholas Bellinger static int core_scsi3_pr_reservation_check( 571c66ac9dbSNicholas Bellinger struct se_cmd *cmd, 572c66ac9dbSNicholas Bellinger u32 *pr_reg_type) 573c66ac9dbSNicholas Bellinger { 574c66ac9dbSNicholas Bellinger struct se_device *dev = cmd->se_dev; 575c66ac9dbSNicholas Bellinger struct se_session *sess = cmd->se_sess; 576c66ac9dbSNicholas Bellinger int ret; 577c66ac9dbSNicholas Bellinger 578c66ac9dbSNicholas Bellinger if (!(sess)) 579c66ac9dbSNicholas Bellinger return 0; 580c66ac9dbSNicholas Bellinger /* 581c66ac9dbSNicholas Bellinger * A legacy SPC-2 reservation is being held. 582c66ac9dbSNicholas Bellinger */ 583c66ac9dbSNicholas Bellinger if (dev->dev_flags & DF_SPC2_RESERVATIONS) 584c66ac9dbSNicholas Bellinger return core_scsi2_reservation_check(cmd, pr_reg_type); 585c66ac9dbSNicholas Bellinger 586c66ac9dbSNicholas Bellinger spin_lock(&dev->dev_reservation_lock); 587c66ac9dbSNicholas Bellinger if (!(dev->dev_pr_res_holder)) { 588c66ac9dbSNicholas Bellinger spin_unlock(&dev->dev_reservation_lock); 589c66ac9dbSNicholas Bellinger return 0; 590c66ac9dbSNicholas Bellinger } 591c66ac9dbSNicholas Bellinger *pr_reg_type = dev->dev_pr_res_holder->pr_res_type; 592c66ac9dbSNicholas Bellinger cmd->pr_res_key = dev->dev_pr_res_holder->pr_res_key; 593c66ac9dbSNicholas Bellinger if (dev->dev_pr_res_holder->pr_reg_nacl != sess->se_node_acl) { 594c66ac9dbSNicholas Bellinger spin_unlock(&dev->dev_reservation_lock); 595e3d6f909SAndy Grover return -EINVAL; 596c66ac9dbSNicholas Bellinger } 597c66ac9dbSNicholas Bellinger if (!(dev->dev_pr_res_holder->isid_present_at_reg)) { 598c66ac9dbSNicholas Bellinger spin_unlock(&dev->dev_reservation_lock); 599c66ac9dbSNicholas Bellinger return 0; 600c66ac9dbSNicholas Bellinger } 601c66ac9dbSNicholas Bellinger ret = (dev->dev_pr_res_holder->pr_reg_bin_isid == 602e3d6f909SAndy Grover sess->sess_bin_isid) ? 0 : -EINVAL; 603c66ac9dbSNicholas Bellinger /* 604c66ac9dbSNicholas Bellinger * Use bit in *pr_reg_type to notify ISID mismatch in 605c66ac9dbSNicholas Bellinger * core_scsi3_pr_seq_non_holder(). 606c66ac9dbSNicholas Bellinger */ 607c66ac9dbSNicholas Bellinger if (ret != 0) 608c66ac9dbSNicholas Bellinger *pr_reg_type |= 0x80000000; 609c66ac9dbSNicholas Bellinger spin_unlock(&dev->dev_reservation_lock); 610c66ac9dbSNicholas Bellinger 611c66ac9dbSNicholas Bellinger return ret; 612c66ac9dbSNicholas Bellinger } 613c66ac9dbSNicholas Bellinger 614c66ac9dbSNicholas Bellinger static struct t10_pr_registration *__core_scsi3_do_alloc_registration( 615c66ac9dbSNicholas Bellinger struct se_device *dev, 616c66ac9dbSNicholas Bellinger struct se_node_acl *nacl, 617c66ac9dbSNicholas Bellinger struct se_dev_entry *deve, 618c66ac9dbSNicholas Bellinger unsigned char *isid, 619c66ac9dbSNicholas Bellinger u64 sa_res_key, 620c66ac9dbSNicholas Bellinger int all_tg_pt, 621c66ac9dbSNicholas Bellinger int aptpl) 622c66ac9dbSNicholas Bellinger { 623e3d6f909SAndy Grover struct se_subsystem_dev *su_dev = dev->se_sub_dev; 624c66ac9dbSNicholas Bellinger struct t10_pr_registration *pr_reg; 625c66ac9dbSNicholas Bellinger 626c66ac9dbSNicholas Bellinger pr_reg = kmem_cache_zalloc(t10_pr_reg_cache, GFP_ATOMIC); 627c66ac9dbSNicholas Bellinger if (!(pr_reg)) { 628c66ac9dbSNicholas Bellinger printk(KERN_ERR "Unable to allocate struct t10_pr_registration\n"); 629c66ac9dbSNicholas Bellinger return NULL; 630c66ac9dbSNicholas Bellinger } 631c66ac9dbSNicholas Bellinger 632e3d6f909SAndy Grover pr_reg->pr_aptpl_buf = kzalloc(su_dev->t10_pr.pr_aptpl_buf_len, 633c66ac9dbSNicholas Bellinger GFP_ATOMIC); 634c66ac9dbSNicholas Bellinger if (!(pr_reg->pr_aptpl_buf)) { 635c66ac9dbSNicholas Bellinger printk(KERN_ERR "Unable to allocate pr_reg->pr_aptpl_buf\n"); 636c66ac9dbSNicholas Bellinger kmem_cache_free(t10_pr_reg_cache, pr_reg); 637c66ac9dbSNicholas Bellinger return NULL; 638c66ac9dbSNicholas Bellinger } 639c66ac9dbSNicholas Bellinger 640c66ac9dbSNicholas Bellinger INIT_LIST_HEAD(&pr_reg->pr_reg_list); 641c66ac9dbSNicholas Bellinger INIT_LIST_HEAD(&pr_reg->pr_reg_abort_list); 642c66ac9dbSNicholas Bellinger INIT_LIST_HEAD(&pr_reg->pr_reg_aptpl_list); 643c66ac9dbSNicholas Bellinger INIT_LIST_HEAD(&pr_reg->pr_reg_atp_list); 644c66ac9dbSNicholas Bellinger INIT_LIST_HEAD(&pr_reg->pr_reg_atp_mem_list); 645c66ac9dbSNicholas Bellinger atomic_set(&pr_reg->pr_res_holders, 0); 646c66ac9dbSNicholas Bellinger pr_reg->pr_reg_nacl = nacl; 647c66ac9dbSNicholas Bellinger pr_reg->pr_reg_deve = deve; 648c66ac9dbSNicholas Bellinger pr_reg->pr_res_mapped_lun = deve->mapped_lun; 649c66ac9dbSNicholas Bellinger pr_reg->pr_aptpl_target_lun = deve->se_lun->unpacked_lun; 650c66ac9dbSNicholas Bellinger pr_reg->pr_res_key = sa_res_key; 651c66ac9dbSNicholas Bellinger pr_reg->pr_reg_all_tg_pt = all_tg_pt; 652c66ac9dbSNicholas Bellinger pr_reg->pr_reg_aptpl = aptpl; 653c66ac9dbSNicholas Bellinger pr_reg->pr_reg_tg_pt_lun = deve->se_lun; 654c66ac9dbSNicholas Bellinger /* 655c66ac9dbSNicholas Bellinger * If an ISID value for this SCSI Initiator Port exists, 656c66ac9dbSNicholas Bellinger * save it to the registration now. 657c66ac9dbSNicholas Bellinger */ 658c66ac9dbSNicholas Bellinger if (isid != NULL) { 659c66ac9dbSNicholas Bellinger pr_reg->pr_reg_bin_isid = get_unaligned_be64(isid); 660c66ac9dbSNicholas Bellinger snprintf(pr_reg->pr_reg_isid, PR_REG_ISID_LEN, "%s", isid); 661c66ac9dbSNicholas Bellinger pr_reg->isid_present_at_reg = 1; 662c66ac9dbSNicholas Bellinger } 663c66ac9dbSNicholas Bellinger 664c66ac9dbSNicholas Bellinger return pr_reg; 665c66ac9dbSNicholas Bellinger } 666c66ac9dbSNicholas Bellinger 667c66ac9dbSNicholas Bellinger static int core_scsi3_lunacl_depend_item(struct se_dev_entry *); 668c66ac9dbSNicholas Bellinger static void core_scsi3_lunacl_undepend_item(struct se_dev_entry *); 669c66ac9dbSNicholas Bellinger 670c66ac9dbSNicholas Bellinger /* 671c66ac9dbSNicholas Bellinger * Function used for handling PR registrations for ALL_TG_PT=1 and ALL_TG_PT=0 672c66ac9dbSNicholas Bellinger * modes. 673c66ac9dbSNicholas Bellinger */ 674c66ac9dbSNicholas Bellinger static struct t10_pr_registration *__core_scsi3_alloc_registration( 675c66ac9dbSNicholas Bellinger struct se_device *dev, 676c66ac9dbSNicholas Bellinger struct se_node_acl *nacl, 677c66ac9dbSNicholas Bellinger struct se_dev_entry *deve, 678c66ac9dbSNicholas Bellinger unsigned char *isid, 679c66ac9dbSNicholas Bellinger u64 sa_res_key, 680c66ac9dbSNicholas Bellinger int all_tg_pt, 681c66ac9dbSNicholas Bellinger int aptpl) 682c66ac9dbSNicholas Bellinger { 683c66ac9dbSNicholas Bellinger struct se_dev_entry *deve_tmp; 684c66ac9dbSNicholas Bellinger struct se_node_acl *nacl_tmp; 685c66ac9dbSNicholas Bellinger struct se_port *port, *port_tmp; 686c66ac9dbSNicholas Bellinger struct target_core_fabric_ops *tfo = nacl->se_tpg->se_tpg_tfo; 687c66ac9dbSNicholas Bellinger struct t10_pr_registration *pr_reg, *pr_reg_atp, *pr_reg_tmp, *pr_reg_tmp_safe; 688c66ac9dbSNicholas Bellinger int ret; 689c66ac9dbSNicholas Bellinger /* 690c66ac9dbSNicholas Bellinger * Create a registration for the I_T Nexus upon which the 691c66ac9dbSNicholas Bellinger * PROUT REGISTER was received. 692c66ac9dbSNicholas Bellinger */ 693c66ac9dbSNicholas Bellinger pr_reg = __core_scsi3_do_alloc_registration(dev, nacl, deve, isid, 694c66ac9dbSNicholas Bellinger sa_res_key, all_tg_pt, aptpl); 695c66ac9dbSNicholas Bellinger if (!(pr_reg)) 696c66ac9dbSNicholas Bellinger return NULL; 697c66ac9dbSNicholas Bellinger /* 698c66ac9dbSNicholas Bellinger * Return pointer to pr_reg for ALL_TG_PT=0 699c66ac9dbSNicholas Bellinger */ 700c66ac9dbSNicholas Bellinger if (!(all_tg_pt)) 701c66ac9dbSNicholas Bellinger return pr_reg; 702c66ac9dbSNicholas Bellinger /* 703c66ac9dbSNicholas Bellinger * Create list of matching SCSI Initiator Port registrations 704c66ac9dbSNicholas Bellinger * for ALL_TG_PT=1 705c66ac9dbSNicholas Bellinger */ 706c66ac9dbSNicholas Bellinger spin_lock(&dev->se_port_lock); 707c66ac9dbSNicholas Bellinger list_for_each_entry_safe(port, port_tmp, &dev->dev_sep_list, sep_list) { 708c66ac9dbSNicholas Bellinger atomic_inc(&port->sep_tg_pt_ref_cnt); 709c66ac9dbSNicholas Bellinger smp_mb__after_atomic_inc(); 710c66ac9dbSNicholas Bellinger spin_unlock(&dev->se_port_lock); 711c66ac9dbSNicholas Bellinger 712c66ac9dbSNicholas Bellinger spin_lock_bh(&port->sep_alua_lock); 713c66ac9dbSNicholas Bellinger list_for_each_entry(deve_tmp, &port->sep_alua_list, 714c66ac9dbSNicholas Bellinger alua_port_list) { 715c66ac9dbSNicholas Bellinger /* 716c66ac9dbSNicholas Bellinger * This pointer will be NULL for demo mode MappedLUNs 717c66ac9dbSNicholas Bellinger * that have not been make explict via a ConfigFS 718c66ac9dbSNicholas Bellinger * MappedLUN group for the SCSI Initiator Node ACL. 719c66ac9dbSNicholas Bellinger */ 720c66ac9dbSNicholas Bellinger if (!(deve_tmp->se_lun_acl)) 721c66ac9dbSNicholas Bellinger continue; 722c66ac9dbSNicholas Bellinger 723c66ac9dbSNicholas Bellinger nacl_tmp = deve_tmp->se_lun_acl->se_lun_nacl; 724c66ac9dbSNicholas Bellinger /* 725c66ac9dbSNicholas Bellinger * Skip the matching struct se_node_acl that is allocated 726c66ac9dbSNicholas Bellinger * above.. 727c66ac9dbSNicholas Bellinger */ 728c66ac9dbSNicholas Bellinger if (nacl == nacl_tmp) 729c66ac9dbSNicholas Bellinger continue; 730c66ac9dbSNicholas Bellinger /* 731c66ac9dbSNicholas Bellinger * Only perform PR registrations for target ports on 732c66ac9dbSNicholas Bellinger * the same fabric module as the REGISTER w/ ALL_TG_PT=1 733c66ac9dbSNicholas Bellinger * arrived. 734c66ac9dbSNicholas Bellinger */ 735c66ac9dbSNicholas Bellinger if (tfo != nacl_tmp->se_tpg->se_tpg_tfo) 736c66ac9dbSNicholas Bellinger continue; 737c66ac9dbSNicholas Bellinger /* 738c66ac9dbSNicholas Bellinger * Look for a matching Initiator Node ACL in ASCII format 739c66ac9dbSNicholas Bellinger */ 740c66ac9dbSNicholas Bellinger if (strcmp(nacl->initiatorname, nacl_tmp->initiatorname)) 741c66ac9dbSNicholas Bellinger continue; 742c66ac9dbSNicholas Bellinger 743c66ac9dbSNicholas Bellinger atomic_inc(&deve_tmp->pr_ref_count); 744c66ac9dbSNicholas Bellinger smp_mb__after_atomic_inc(); 745c66ac9dbSNicholas Bellinger spin_unlock_bh(&port->sep_alua_lock); 746c66ac9dbSNicholas Bellinger /* 747c66ac9dbSNicholas Bellinger * Grab a configfs group dependency that is released 748c66ac9dbSNicholas Bellinger * for the exception path at label out: below, or upon 749c66ac9dbSNicholas Bellinger * completion of adding ALL_TG_PT=1 registrations in 750c66ac9dbSNicholas Bellinger * __core_scsi3_add_registration() 751c66ac9dbSNicholas Bellinger */ 752c66ac9dbSNicholas Bellinger ret = core_scsi3_lunacl_depend_item(deve_tmp); 753c66ac9dbSNicholas Bellinger if (ret < 0) { 754c66ac9dbSNicholas Bellinger printk(KERN_ERR "core_scsi3_lunacl_depend" 755c66ac9dbSNicholas Bellinger "_item() failed\n"); 756c66ac9dbSNicholas Bellinger atomic_dec(&port->sep_tg_pt_ref_cnt); 757c66ac9dbSNicholas Bellinger smp_mb__after_atomic_dec(); 758c66ac9dbSNicholas Bellinger atomic_dec(&deve_tmp->pr_ref_count); 759c66ac9dbSNicholas Bellinger smp_mb__after_atomic_dec(); 760c66ac9dbSNicholas Bellinger goto out; 761c66ac9dbSNicholas Bellinger } 762c66ac9dbSNicholas Bellinger /* 763c66ac9dbSNicholas Bellinger * Located a matching SCSI Initiator Port on a different 764c66ac9dbSNicholas Bellinger * port, allocate the pr_reg_atp and attach it to the 765c66ac9dbSNicholas Bellinger * pr_reg->pr_reg_atp_list that will be processed once 766c66ac9dbSNicholas Bellinger * the original *pr_reg is processed in 767c66ac9dbSNicholas Bellinger * __core_scsi3_add_registration() 768c66ac9dbSNicholas Bellinger */ 769c66ac9dbSNicholas Bellinger pr_reg_atp = __core_scsi3_do_alloc_registration(dev, 770c66ac9dbSNicholas Bellinger nacl_tmp, deve_tmp, NULL, 771c66ac9dbSNicholas Bellinger sa_res_key, all_tg_pt, aptpl); 772c66ac9dbSNicholas Bellinger if (!(pr_reg_atp)) { 773c66ac9dbSNicholas Bellinger atomic_dec(&port->sep_tg_pt_ref_cnt); 774c66ac9dbSNicholas Bellinger smp_mb__after_atomic_dec(); 775c66ac9dbSNicholas Bellinger atomic_dec(&deve_tmp->pr_ref_count); 776c66ac9dbSNicholas Bellinger smp_mb__after_atomic_dec(); 777c66ac9dbSNicholas Bellinger core_scsi3_lunacl_undepend_item(deve_tmp); 778c66ac9dbSNicholas Bellinger goto out; 779c66ac9dbSNicholas Bellinger } 780c66ac9dbSNicholas Bellinger 781c66ac9dbSNicholas Bellinger list_add_tail(&pr_reg_atp->pr_reg_atp_mem_list, 782c66ac9dbSNicholas Bellinger &pr_reg->pr_reg_atp_list); 783c66ac9dbSNicholas Bellinger spin_lock_bh(&port->sep_alua_lock); 784c66ac9dbSNicholas Bellinger } 785c66ac9dbSNicholas Bellinger spin_unlock_bh(&port->sep_alua_lock); 786c66ac9dbSNicholas Bellinger 787c66ac9dbSNicholas Bellinger spin_lock(&dev->se_port_lock); 788c66ac9dbSNicholas Bellinger atomic_dec(&port->sep_tg_pt_ref_cnt); 789c66ac9dbSNicholas Bellinger smp_mb__after_atomic_dec(); 790c66ac9dbSNicholas Bellinger } 791c66ac9dbSNicholas Bellinger spin_unlock(&dev->se_port_lock); 792c66ac9dbSNicholas Bellinger 793c66ac9dbSNicholas Bellinger return pr_reg; 794c66ac9dbSNicholas Bellinger out: 795c66ac9dbSNicholas Bellinger list_for_each_entry_safe(pr_reg_tmp, pr_reg_tmp_safe, 796c66ac9dbSNicholas Bellinger &pr_reg->pr_reg_atp_list, pr_reg_atp_mem_list) { 797c66ac9dbSNicholas Bellinger list_del(&pr_reg_tmp->pr_reg_atp_mem_list); 798c66ac9dbSNicholas Bellinger core_scsi3_lunacl_undepend_item(pr_reg_tmp->pr_reg_deve); 799c66ac9dbSNicholas Bellinger kmem_cache_free(t10_pr_reg_cache, pr_reg_tmp); 800c66ac9dbSNicholas Bellinger } 801c66ac9dbSNicholas Bellinger kmem_cache_free(t10_pr_reg_cache, pr_reg); 802c66ac9dbSNicholas Bellinger return NULL; 803c66ac9dbSNicholas Bellinger } 804c66ac9dbSNicholas Bellinger 805c66ac9dbSNicholas Bellinger int core_scsi3_alloc_aptpl_registration( 806e3d6f909SAndy Grover struct t10_reservation *pr_tmpl, 807c66ac9dbSNicholas Bellinger u64 sa_res_key, 808c66ac9dbSNicholas Bellinger unsigned char *i_port, 809c66ac9dbSNicholas Bellinger unsigned char *isid, 810c66ac9dbSNicholas Bellinger u32 mapped_lun, 811c66ac9dbSNicholas Bellinger unsigned char *t_port, 812c66ac9dbSNicholas Bellinger u16 tpgt, 813c66ac9dbSNicholas Bellinger u32 target_lun, 814c66ac9dbSNicholas Bellinger int res_holder, 815c66ac9dbSNicholas Bellinger int all_tg_pt, 816c66ac9dbSNicholas Bellinger u8 type) 817c66ac9dbSNicholas Bellinger { 818c66ac9dbSNicholas Bellinger struct t10_pr_registration *pr_reg; 819c66ac9dbSNicholas Bellinger 820c66ac9dbSNicholas Bellinger if (!(i_port) || !(t_port) || !(sa_res_key)) { 821c66ac9dbSNicholas Bellinger printk(KERN_ERR "Illegal parameters for APTPL registration\n"); 822e3d6f909SAndy Grover return -EINVAL; 823c66ac9dbSNicholas Bellinger } 824c66ac9dbSNicholas Bellinger 825c66ac9dbSNicholas Bellinger pr_reg = kmem_cache_zalloc(t10_pr_reg_cache, GFP_KERNEL); 826c66ac9dbSNicholas Bellinger if (!(pr_reg)) { 827c66ac9dbSNicholas Bellinger printk(KERN_ERR "Unable to allocate struct t10_pr_registration\n"); 828e3d6f909SAndy Grover return -ENOMEM; 829c66ac9dbSNicholas Bellinger } 830c66ac9dbSNicholas Bellinger pr_reg->pr_aptpl_buf = kzalloc(pr_tmpl->pr_aptpl_buf_len, GFP_KERNEL); 831c66ac9dbSNicholas Bellinger 832c66ac9dbSNicholas Bellinger INIT_LIST_HEAD(&pr_reg->pr_reg_list); 833c66ac9dbSNicholas Bellinger INIT_LIST_HEAD(&pr_reg->pr_reg_abort_list); 834c66ac9dbSNicholas Bellinger INIT_LIST_HEAD(&pr_reg->pr_reg_aptpl_list); 835c66ac9dbSNicholas Bellinger INIT_LIST_HEAD(&pr_reg->pr_reg_atp_list); 836c66ac9dbSNicholas Bellinger INIT_LIST_HEAD(&pr_reg->pr_reg_atp_mem_list); 837c66ac9dbSNicholas Bellinger atomic_set(&pr_reg->pr_res_holders, 0); 838c66ac9dbSNicholas Bellinger pr_reg->pr_reg_nacl = NULL; 839c66ac9dbSNicholas Bellinger pr_reg->pr_reg_deve = NULL; 840c66ac9dbSNicholas Bellinger pr_reg->pr_res_mapped_lun = mapped_lun; 841c66ac9dbSNicholas Bellinger pr_reg->pr_aptpl_target_lun = target_lun; 842c66ac9dbSNicholas Bellinger pr_reg->pr_res_key = sa_res_key; 843c66ac9dbSNicholas Bellinger pr_reg->pr_reg_all_tg_pt = all_tg_pt; 844c66ac9dbSNicholas Bellinger pr_reg->pr_reg_aptpl = 1; 845c66ac9dbSNicholas Bellinger pr_reg->pr_reg_tg_pt_lun = NULL; 846c66ac9dbSNicholas Bellinger pr_reg->pr_res_scope = 0; /* Always LUN_SCOPE */ 847c66ac9dbSNicholas Bellinger pr_reg->pr_res_type = type; 848c66ac9dbSNicholas Bellinger /* 849c66ac9dbSNicholas Bellinger * If an ISID value had been saved in APTPL metadata for this 850c66ac9dbSNicholas Bellinger * SCSI Initiator Port, restore it now. 851c66ac9dbSNicholas Bellinger */ 852c66ac9dbSNicholas Bellinger if (isid != NULL) { 853c66ac9dbSNicholas Bellinger pr_reg->pr_reg_bin_isid = get_unaligned_be64(isid); 854c66ac9dbSNicholas Bellinger snprintf(pr_reg->pr_reg_isid, PR_REG_ISID_LEN, "%s", isid); 855c66ac9dbSNicholas Bellinger pr_reg->isid_present_at_reg = 1; 856c66ac9dbSNicholas Bellinger } 857c66ac9dbSNicholas Bellinger /* 858c66ac9dbSNicholas Bellinger * Copy the i_port and t_port information from caller. 859c66ac9dbSNicholas Bellinger */ 860c66ac9dbSNicholas Bellinger snprintf(pr_reg->pr_iport, PR_APTPL_MAX_IPORT_LEN, "%s", i_port); 861c66ac9dbSNicholas Bellinger snprintf(pr_reg->pr_tport, PR_APTPL_MAX_TPORT_LEN, "%s", t_port); 862c66ac9dbSNicholas Bellinger pr_reg->pr_reg_tpgt = tpgt; 863c66ac9dbSNicholas Bellinger /* 864c66ac9dbSNicholas Bellinger * Set pr_res_holder from caller, the pr_reg who is the reservation 865c66ac9dbSNicholas Bellinger * holder will get it's pointer set in core_scsi3_aptpl_reserve() once 866c66ac9dbSNicholas Bellinger * the Initiator Node LUN ACL from the fabric module is created for 867c66ac9dbSNicholas Bellinger * this registration. 868c66ac9dbSNicholas Bellinger */ 869c66ac9dbSNicholas Bellinger pr_reg->pr_res_holder = res_holder; 870c66ac9dbSNicholas Bellinger 871c66ac9dbSNicholas Bellinger list_add_tail(&pr_reg->pr_reg_aptpl_list, &pr_tmpl->aptpl_reg_list); 872c66ac9dbSNicholas Bellinger printk(KERN_INFO "SPC-3 PR APTPL Successfully added registration%s from" 873c66ac9dbSNicholas Bellinger " metadata\n", (res_holder) ? "+reservation" : ""); 874c66ac9dbSNicholas Bellinger return 0; 875c66ac9dbSNicholas Bellinger } 876c66ac9dbSNicholas Bellinger 877c66ac9dbSNicholas Bellinger static void core_scsi3_aptpl_reserve( 878c66ac9dbSNicholas Bellinger struct se_device *dev, 879c66ac9dbSNicholas Bellinger struct se_portal_group *tpg, 880c66ac9dbSNicholas Bellinger struct se_node_acl *node_acl, 881c66ac9dbSNicholas Bellinger struct t10_pr_registration *pr_reg) 882c66ac9dbSNicholas Bellinger { 883c66ac9dbSNicholas Bellinger char i_buf[PR_REG_ISID_ID_LEN]; 884c66ac9dbSNicholas Bellinger int prf_isid; 885c66ac9dbSNicholas Bellinger 886c66ac9dbSNicholas Bellinger memset(i_buf, 0, PR_REG_ISID_ID_LEN); 887c66ac9dbSNicholas Bellinger prf_isid = core_pr_dump_initiator_port(pr_reg, &i_buf[0], 888c66ac9dbSNicholas Bellinger PR_REG_ISID_ID_LEN); 889c66ac9dbSNicholas Bellinger 890c66ac9dbSNicholas Bellinger spin_lock(&dev->dev_reservation_lock); 891c66ac9dbSNicholas Bellinger dev->dev_pr_res_holder = pr_reg; 892c66ac9dbSNicholas Bellinger spin_unlock(&dev->dev_reservation_lock); 893c66ac9dbSNicholas Bellinger 894c66ac9dbSNicholas Bellinger printk(KERN_INFO "SPC-3 PR [%s] Service Action: APTPL RESERVE created" 895c66ac9dbSNicholas Bellinger " new reservation holder TYPE: %s ALL_TG_PT: %d\n", 896e3d6f909SAndy Grover tpg->se_tpg_tfo->get_fabric_name(), 897c66ac9dbSNicholas Bellinger core_scsi3_pr_dump_type(pr_reg->pr_res_type), 898c66ac9dbSNicholas Bellinger (pr_reg->pr_reg_all_tg_pt) ? 1 : 0); 899c66ac9dbSNicholas Bellinger printk(KERN_INFO "SPC-3 PR [%s] RESERVE Node: %s%s\n", 900e3d6f909SAndy Grover tpg->se_tpg_tfo->get_fabric_name(), node_acl->initiatorname, 901c66ac9dbSNicholas Bellinger (prf_isid) ? &i_buf[0] : ""); 902c66ac9dbSNicholas Bellinger } 903c66ac9dbSNicholas Bellinger 904c66ac9dbSNicholas Bellinger static void __core_scsi3_add_registration(struct se_device *, struct se_node_acl *, 905c66ac9dbSNicholas Bellinger struct t10_pr_registration *, int, int); 906c66ac9dbSNicholas Bellinger 907c66ac9dbSNicholas Bellinger static int __core_scsi3_check_aptpl_registration( 908c66ac9dbSNicholas Bellinger struct se_device *dev, 909c66ac9dbSNicholas Bellinger struct se_portal_group *tpg, 910c66ac9dbSNicholas Bellinger struct se_lun *lun, 911c66ac9dbSNicholas Bellinger u32 target_lun, 912c66ac9dbSNicholas Bellinger struct se_node_acl *nacl, 913c66ac9dbSNicholas Bellinger struct se_dev_entry *deve) 914c66ac9dbSNicholas Bellinger { 915c66ac9dbSNicholas Bellinger struct t10_pr_registration *pr_reg, *pr_reg_tmp; 916e3d6f909SAndy Grover struct t10_reservation *pr_tmpl = &dev->se_sub_dev->t10_pr; 917c66ac9dbSNicholas Bellinger unsigned char i_port[PR_APTPL_MAX_IPORT_LEN]; 918c66ac9dbSNicholas Bellinger unsigned char t_port[PR_APTPL_MAX_TPORT_LEN]; 919c66ac9dbSNicholas Bellinger u16 tpgt; 920c66ac9dbSNicholas Bellinger 921c66ac9dbSNicholas Bellinger memset(i_port, 0, PR_APTPL_MAX_IPORT_LEN); 922c66ac9dbSNicholas Bellinger memset(t_port, 0, PR_APTPL_MAX_TPORT_LEN); 923c66ac9dbSNicholas Bellinger /* 924c66ac9dbSNicholas Bellinger * Copy Initiator Port information from struct se_node_acl 925c66ac9dbSNicholas Bellinger */ 926c66ac9dbSNicholas Bellinger snprintf(i_port, PR_APTPL_MAX_IPORT_LEN, "%s", nacl->initiatorname); 927c66ac9dbSNicholas Bellinger snprintf(t_port, PR_APTPL_MAX_TPORT_LEN, "%s", 928e3d6f909SAndy Grover tpg->se_tpg_tfo->tpg_get_wwn(tpg)); 929e3d6f909SAndy Grover tpgt = tpg->se_tpg_tfo->tpg_get_tag(tpg); 930c66ac9dbSNicholas Bellinger /* 931c66ac9dbSNicholas Bellinger * Look for the matching registrations+reservation from those 932c66ac9dbSNicholas Bellinger * created from APTPL metadata. Note that multiple registrations 933c66ac9dbSNicholas Bellinger * may exist for fabrics that use ISIDs in their SCSI Initiator Port 934c66ac9dbSNicholas Bellinger * TransportIDs. 935c66ac9dbSNicholas Bellinger */ 936c66ac9dbSNicholas Bellinger spin_lock(&pr_tmpl->aptpl_reg_lock); 937c66ac9dbSNicholas Bellinger list_for_each_entry_safe(pr_reg, pr_reg_tmp, &pr_tmpl->aptpl_reg_list, 938c66ac9dbSNicholas Bellinger pr_reg_aptpl_list) { 939c66ac9dbSNicholas Bellinger if (!(strcmp(pr_reg->pr_iport, i_port)) && 940c66ac9dbSNicholas Bellinger (pr_reg->pr_res_mapped_lun == deve->mapped_lun) && 941c66ac9dbSNicholas Bellinger !(strcmp(pr_reg->pr_tport, t_port)) && 942c66ac9dbSNicholas Bellinger (pr_reg->pr_reg_tpgt == tpgt) && 943c66ac9dbSNicholas Bellinger (pr_reg->pr_aptpl_target_lun == target_lun)) { 944c66ac9dbSNicholas Bellinger 945c66ac9dbSNicholas Bellinger pr_reg->pr_reg_nacl = nacl; 946c66ac9dbSNicholas Bellinger pr_reg->pr_reg_deve = deve; 947c66ac9dbSNicholas Bellinger pr_reg->pr_reg_tg_pt_lun = lun; 948c66ac9dbSNicholas Bellinger 949c66ac9dbSNicholas Bellinger list_del(&pr_reg->pr_reg_aptpl_list); 950c66ac9dbSNicholas Bellinger spin_unlock(&pr_tmpl->aptpl_reg_lock); 951c66ac9dbSNicholas Bellinger /* 952c66ac9dbSNicholas Bellinger * At this point all of the pointers in *pr_reg will 953c66ac9dbSNicholas Bellinger * be setup, so go ahead and add the registration. 954c66ac9dbSNicholas Bellinger */ 955c66ac9dbSNicholas Bellinger 956c66ac9dbSNicholas Bellinger __core_scsi3_add_registration(dev, nacl, pr_reg, 0, 0); 957c66ac9dbSNicholas Bellinger /* 958c66ac9dbSNicholas Bellinger * If this registration is the reservation holder, 959c66ac9dbSNicholas Bellinger * make that happen now.. 960c66ac9dbSNicholas Bellinger */ 961c66ac9dbSNicholas Bellinger if (pr_reg->pr_res_holder) 962c66ac9dbSNicholas Bellinger core_scsi3_aptpl_reserve(dev, tpg, 963c66ac9dbSNicholas Bellinger nacl, pr_reg); 964c66ac9dbSNicholas Bellinger /* 965c66ac9dbSNicholas Bellinger * Reenable pr_aptpl_active to accept new metadata 966c66ac9dbSNicholas Bellinger * updates once the SCSI device is active again.. 967c66ac9dbSNicholas Bellinger */ 968c66ac9dbSNicholas Bellinger spin_lock(&pr_tmpl->aptpl_reg_lock); 969c66ac9dbSNicholas Bellinger pr_tmpl->pr_aptpl_active = 1; 970c66ac9dbSNicholas Bellinger } 971c66ac9dbSNicholas Bellinger } 972c66ac9dbSNicholas Bellinger spin_unlock(&pr_tmpl->aptpl_reg_lock); 973c66ac9dbSNicholas Bellinger 974c66ac9dbSNicholas Bellinger return 0; 975c66ac9dbSNicholas Bellinger } 976c66ac9dbSNicholas Bellinger 977c66ac9dbSNicholas Bellinger int core_scsi3_check_aptpl_registration( 978c66ac9dbSNicholas Bellinger struct se_device *dev, 979c66ac9dbSNicholas Bellinger struct se_portal_group *tpg, 980c66ac9dbSNicholas Bellinger struct se_lun *lun, 981c66ac9dbSNicholas Bellinger struct se_lun_acl *lun_acl) 982c66ac9dbSNicholas Bellinger { 983e3d6f909SAndy Grover struct se_subsystem_dev *su_dev = dev->se_sub_dev; 984c66ac9dbSNicholas Bellinger struct se_node_acl *nacl = lun_acl->se_lun_nacl; 985c66ac9dbSNicholas Bellinger struct se_dev_entry *deve = &nacl->device_list[lun_acl->mapped_lun]; 986c66ac9dbSNicholas Bellinger 987e3d6f909SAndy Grover if (su_dev->t10_pr.res_type != SPC3_PERSISTENT_RESERVATIONS) 988c66ac9dbSNicholas Bellinger return 0; 989c66ac9dbSNicholas Bellinger 990c66ac9dbSNicholas Bellinger return __core_scsi3_check_aptpl_registration(dev, tpg, lun, 991c66ac9dbSNicholas Bellinger lun->unpacked_lun, nacl, deve); 992c66ac9dbSNicholas Bellinger } 993c66ac9dbSNicholas Bellinger 994c66ac9dbSNicholas Bellinger static void __core_scsi3_dump_registration( 995c66ac9dbSNicholas Bellinger struct target_core_fabric_ops *tfo, 996c66ac9dbSNicholas Bellinger struct se_device *dev, 997c66ac9dbSNicholas Bellinger struct se_node_acl *nacl, 998c66ac9dbSNicholas Bellinger struct t10_pr_registration *pr_reg, 999c66ac9dbSNicholas Bellinger int register_type) 1000c66ac9dbSNicholas Bellinger { 1001c66ac9dbSNicholas Bellinger struct se_portal_group *se_tpg = nacl->se_tpg; 1002c66ac9dbSNicholas Bellinger char i_buf[PR_REG_ISID_ID_LEN]; 1003c66ac9dbSNicholas Bellinger int prf_isid; 1004c66ac9dbSNicholas Bellinger 1005c66ac9dbSNicholas Bellinger memset(&i_buf[0], 0, PR_REG_ISID_ID_LEN); 1006c66ac9dbSNicholas Bellinger prf_isid = core_pr_dump_initiator_port(pr_reg, &i_buf[0], 1007c66ac9dbSNicholas Bellinger PR_REG_ISID_ID_LEN); 1008c66ac9dbSNicholas Bellinger 1009c66ac9dbSNicholas Bellinger printk(KERN_INFO "SPC-3 PR [%s] Service Action: REGISTER%s Initiator" 1010c66ac9dbSNicholas Bellinger " Node: %s%s\n", tfo->get_fabric_name(), (register_type == 2) ? 1011c66ac9dbSNicholas Bellinger "_AND_MOVE" : (register_type == 1) ? 1012c66ac9dbSNicholas Bellinger "_AND_IGNORE_EXISTING_KEY" : "", nacl->initiatorname, 1013c66ac9dbSNicholas Bellinger (prf_isid) ? i_buf : ""); 1014c66ac9dbSNicholas Bellinger printk(KERN_INFO "SPC-3 PR [%s] registration on Target Port: %s,0x%04x\n", 1015c66ac9dbSNicholas Bellinger tfo->get_fabric_name(), tfo->tpg_get_wwn(se_tpg), 1016c66ac9dbSNicholas Bellinger tfo->tpg_get_tag(se_tpg)); 1017c66ac9dbSNicholas Bellinger printk(KERN_INFO "SPC-3 PR [%s] for %s TCM Subsystem %s Object Target" 1018c66ac9dbSNicholas Bellinger " Port(s)\n", tfo->get_fabric_name(), 1019c66ac9dbSNicholas Bellinger (pr_reg->pr_reg_all_tg_pt) ? "ALL" : "SINGLE", 1020e3d6f909SAndy Grover dev->transport->name); 1021c66ac9dbSNicholas Bellinger printk(KERN_INFO "SPC-3 PR [%s] SA Res Key: 0x%016Lx PRgeneration:" 1022c66ac9dbSNicholas Bellinger " 0x%08x APTPL: %d\n", tfo->get_fabric_name(), 1023c66ac9dbSNicholas Bellinger pr_reg->pr_res_key, pr_reg->pr_res_generation, 1024c66ac9dbSNicholas Bellinger pr_reg->pr_reg_aptpl); 1025c66ac9dbSNicholas Bellinger } 1026c66ac9dbSNicholas Bellinger 1027c66ac9dbSNicholas Bellinger /* 1028c66ac9dbSNicholas Bellinger * this function can be called with struct se_device->dev_reservation_lock 1029c66ac9dbSNicholas Bellinger * when register_move = 1 1030c66ac9dbSNicholas Bellinger */ 1031c66ac9dbSNicholas Bellinger static void __core_scsi3_add_registration( 1032c66ac9dbSNicholas Bellinger struct se_device *dev, 1033c66ac9dbSNicholas Bellinger struct se_node_acl *nacl, 1034c66ac9dbSNicholas Bellinger struct t10_pr_registration *pr_reg, 1035c66ac9dbSNicholas Bellinger int register_type, 1036c66ac9dbSNicholas Bellinger int register_move) 1037c66ac9dbSNicholas Bellinger { 1038e3d6f909SAndy Grover struct se_subsystem_dev *su_dev = dev->se_sub_dev; 1039c66ac9dbSNicholas Bellinger struct target_core_fabric_ops *tfo = nacl->se_tpg->se_tpg_tfo; 1040c66ac9dbSNicholas Bellinger struct t10_pr_registration *pr_reg_tmp, *pr_reg_tmp_safe; 1041e3d6f909SAndy Grover struct t10_reservation *pr_tmpl = &dev->se_sub_dev->t10_pr; 1042c66ac9dbSNicholas Bellinger 1043c66ac9dbSNicholas Bellinger /* 1044c66ac9dbSNicholas Bellinger * Increment PRgeneration counter for struct se_device upon a successful 1045c66ac9dbSNicholas Bellinger * REGISTER, see spc4r17 section 6.3.2 READ_KEYS service action 1046c66ac9dbSNicholas Bellinger * 1047c66ac9dbSNicholas Bellinger * Also, when register_move = 1 for PROUT REGISTER_AND_MOVE service 1048c66ac9dbSNicholas Bellinger * action, the struct se_device->dev_reservation_lock will already be held, 1049c66ac9dbSNicholas Bellinger * so we do not call core_scsi3_pr_generation() which grabs the lock 1050c66ac9dbSNicholas Bellinger * for the REGISTER. 1051c66ac9dbSNicholas Bellinger */ 1052c66ac9dbSNicholas Bellinger pr_reg->pr_res_generation = (register_move) ? 1053e3d6f909SAndy Grover su_dev->t10_pr.pr_generation++ : 1054c66ac9dbSNicholas Bellinger core_scsi3_pr_generation(dev); 1055c66ac9dbSNicholas Bellinger 1056c66ac9dbSNicholas Bellinger spin_lock(&pr_tmpl->registration_lock); 1057c66ac9dbSNicholas Bellinger list_add_tail(&pr_reg->pr_reg_list, &pr_tmpl->registration_list); 1058c66ac9dbSNicholas Bellinger pr_reg->pr_reg_deve->def_pr_registered = 1; 1059c66ac9dbSNicholas Bellinger 1060c66ac9dbSNicholas Bellinger __core_scsi3_dump_registration(tfo, dev, nacl, pr_reg, register_type); 1061c66ac9dbSNicholas Bellinger spin_unlock(&pr_tmpl->registration_lock); 1062c66ac9dbSNicholas Bellinger /* 1063c66ac9dbSNicholas Bellinger * Skip extra processing for ALL_TG_PT=0 or REGISTER_AND_MOVE. 1064c66ac9dbSNicholas Bellinger */ 1065c66ac9dbSNicholas Bellinger if (!(pr_reg->pr_reg_all_tg_pt) || (register_move)) 1066c66ac9dbSNicholas Bellinger return; 1067c66ac9dbSNicholas Bellinger /* 1068c66ac9dbSNicholas Bellinger * Walk pr_reg->pr_reg_atp_list and add registrations for ALL_TG_PT=1 1069c66ac9dbSNicholas Bellinger * allocated in __core_scsi3_alloc_registration() 1070c66ac9dbSNicholas Bellinger */ 1071c66ac9dbSNicholas Bellinger list_for_each_entry_safe(pr_reg_tmp, pr_reg_tmp_safe, 1072c66ac9dbSNicholas Bellinger &pr_reg->pr_reg_atp_list, pr_reg_atp_mem_list) { 1073c66ac9dbSNicholas Bellinger list_del(&pr_reg_tmp->pr_reg_atp_mem_list); 1074c66ac9dbSNicholas Bellinger 1075c66ac9dbSNicholas Bellinger pr_reg_tmp->pr_res_generation = core_scsi3_pr_generation(dev); 1076c66ac9dbSNicholas Bellinger 1077c66ac9dbSNicholas Bellinger spin_lock(&pr_tmpl->registration_lock); 1078c66ac9dbSNicholas Bellinger list_add_tail(&pr_reg_tmp->pr_reg_list, 1079c66ac9dbSNicholas Bellinger &pr_tmpl->registration_list); 1080c66ac9dbSNicholas Bellinger pr_reg_tmp->pr_reg_deve->def_pr_registered = 1; 1081c66ac9dbSNicholas Bellinger 1082c66ac9dbSNicholas Bellinger __core_scsi3_dump_registration(tfo, dev, 1083c66ac9dbSNicholas Bellinger pr_reg_tmp->pr_reg_nacl, pr_reg_tmp, 1084c66ac9dbSNicholas Bellinger register_type); 1085c66ac9dbSNicholas Bellinger spin_unlock(&pr_tmpl->registration_lock); 1086c66ac9dbSNicholas Bellinger /* 1087c66ac9dbSNicholas Bellinger * Drop configfs group dependency reference from 1088c66ac9dbSNicholas Bellinger * __core_scsi3_alloc_registration() 1089c66ac9dbSNicholas Bellinger */ 1090c66ac9dbSNicholas Bellinger core_scsi3_lunacl_undepend_item(pr_reg_tmp->pr_reg_deve); 1091c66ac9dbSNicholas Bellinger } 1092c66ac9dbSNicholas Bellinger } 1093c66ac9dbSNicholas Bellinger 1094c66ac9dbSNicholas Bellinger static int core_scsi3_alloc_registration( 1095c66ac9dbSNicholas Bellinger struct se_device *dev, 1096c66ac9dbSNicholas Bellinger struct se_node_acl *nacl, 1097c66ac9dbSNicholas Bellinger struct se_dev_entry *deve, 1098c66ac9dbSNicholas Bellinger unsigned char *isid, 1099c66ac9dbSNicholas Bellinger u64 sa_res_key, 1100c66ac9dbSNicholas Bellinger int all_tg_pt, 1101c66ac9dbSNicholas Bellinger int aptpl, 1102c66ac9dbSNicholas Bellinger int register_type, 1103c66ac9dbSNicholas Bellinger int register_move) 1104c66ac9dbSNicholas Bellinger { 1105c66ac9dbSNicholas Bellinger struct t10_pr_registration *pr_reg; 1106c66ac9dbSNicholas Bellinger 1107c66ac9dbSNicholas Bellinger pr_reg = __core_scsi3_alloc_registration(dev, nacl, deve, isid, 1108c66ac9dbSNicholas Bellinger sa_res_key, all_tg_pt, aptpl); 1109c66ac9dbSNicholas Bellinger if (!(pr_reg)) 1110e3d6f909SAndy Grover return -EPERM; 1111c66ac9dbSNicholas Bellinger 1112c66ac9dbSNicholas Bellinger __core_scsi3_add_registration(dev, nacl, pr_reg, 1113c66ac9dbSNicholas Bellinger register_type, register_move); 1114c66ac9dbSNicholas Bellinger return 0; 1115c66ac9dbSNicholas Bellinger } 1116c66ac9dbSNicholas Bellinger 1117c66ac9dbSNicholas Bellinger static struct t10_pr_registration *__core_scsi3_locate_pr_reg( 1118c66ac9dbSNicholas Bellinger struct se_device *dev, 1119c66ac9dbSNicholas Bellinger struct se_node_acl *nacl, 1120c66ac9dbSNicholas Bellinger unsigned char *isid) 1121c66ac9dbSNicholas Bellinger { 1122e3d6f909SAndy Grover struct t10_reservation *pr_tmpl = &dev->se_sub_dev->t10_pr; 1123c66ac9dbSNicholas Bellinger struct t10_pr_registration *pr_reg, *pr_reg_tmp; 1124c66ac9dbSNicholas Bellinger struct se_portal_group *tpg; 1125c66ac9dbSNicholas Bellinger 1126c66ac9dbSNicholas Bellinger spin_lock(&pr_tmpl->registration_lock); 1127c66ac9dbSNicholas Bellinger list_for_each_entry_safe(pr_reg, pr_reg_tmp, 1128c66ac9dbSNicholas Bellinger &pr_tmpl->registration_list, pr_reg_list) { 1129c66ac9dbSNicholas Bellinger /* 1130c66ac9dbSNicholas Bellinger * First look for a matching struct se_node_acl 1131c66ac9dbSNicholas Bellinger */ 1132c66ac9dbSNicholas Bellinger if (pr_reg->pr_reg_nacl != nacl) 1133c66ac9dbSNicholas Bellinger continue; 1134c66ac9dbSNicholas Bellinger 1135c66ac9dbSNicholas Bellinger tpg = pr_reg->pr_reg_nacl->se_tpg; 1136c66ac9dbSNicholas Bellinger /* 1137c66ac9dbSNicholas Bellinger * If this registration does NOT contain a fabric provided 1138c66ac9dbSNicholas Bellinger * ISID, then we have found a match. 1139c66ac9dbSNicholas Bellinger */ 1140c66ac9dbSNicholas Bellinger if (!(pr_reg->isid_present_at_reg)) { 1141c66ac9dbSNicholas Bellinger /* 1142c66ac9dbSNicholas Bellinger * Determine if this SCSI device server requires that 1143c66ac9dbSNicholas Bellinger * SCSI Intiatior TransportID w/ ISIDs is enforced 1144c66ac9dbSNicholas Bellinger * for fabric modules (iSCSI) requiring them. 1145c66ac9dbSNicholas Bellinger */ 1146e3d6f909SAndy Grover if (tpg->se_tpg_tfo->sess_get_initiator_sid != NULL) { 1147e3d6f909SAndy Grover if (dev->se_sub_dev->se_dev_attrib.enforce_pr_isids) 1148c66ac9dbSNicholas Bellinger continue; 1149c66ac9dbSNicholas Bellinger } 1150c66ac9dbSNicholas Bellinger atomic_inc(&pr_reg->pr_res_holders); 1151c66ac9dbSNicholas Bellinger smp_mb__after_atomic_inc(); 1152c66ac9dbSNicholas Bellinger spin_unlock(&pr_tmpl->registration_lock); 1153c66ac9dbSNicholas Bellinger return pr_reg; 1154c66ac9dbSNicholas Bellinger } 1155c66ac9dbSNicholas Bellinger /* 1156c66ac9dbSNicholas Bellinger * If the *pr_reg contains a fabric defined ISID for multi-value 1157c66ac9dbSNicholas Bellinger * SCSI Initiator Port TransportIDs, then we expect a valid 1158c66ac9dbSNicholas Bellinger * matching ISID to be provided by the local SCSI Initiator Port. 1159c66ac9dbSNicholas Bellinger */ 1160c66ac9dbSNicholas Bellinger if (!(isid)) 1161c66ac9dbSNicholas Bellinger continue; 1162c66ac9dbSNicholas Bellinger if (strcmp(isid, pr_reg->pr_reg_isid)) 1163c66ac9dbSNicholas Bellinger continue; 1164c66ac9dbSNicholas Bellinger 1165c66ac9dbSNicholas Bellinger atomic_inc(&pr_reg->pr_res_holders); 1166c66ac9dbSNicholas Bellinger smp_mb__after_atomic_inc(); 1167c66ac9dbSNicholas Bellinger spin_unlock(&pr_tmpl->registration_lock); 1168c66ac9dbSNicholas Bellinger return pr_reg; 1169c66ac9dbSNicholas Bellinger } 1170c66ac9dbSNicholas Bellinger spin_unlock(&pr_tmpl->registration_lock); 1171c66ac9dbSNicholas Bellinger 1172c66ac9dbSNicholas Bellinger return NULL; 1173c66ac9dbSNicholas Bellinger } 1174c66ac9dbSNicholas Bellinger 1175c66ac9dbSNicholas Bellinger static struct t10_pr_registration *core_scsi3_locate_pr_reg( 1176c66ac9dbSNicholas Bellinger struct se_device *dev, 1177c66ac9dbSNicholas Bellinger struct se_node_acl *nacl, 1178c66ac9dbSNicholas Bellinger struct se_session *sess) 1179c66ac9dbSNicholas Bellinger { 1180c66ac9dbSNicholas Bellinger struct se_portal_group *tpg = nacl->se_tpg; 1181c66ac9dbSNicholas Bellinger unsigned char buf[PR_REG_ISID_LEN], *isid_ptr = NULL; 1182c66ac9dbSNicholas Bellinger 1183e3d6f909SAndy Grover if (tpg->se_tpg_tfo->sess_get_initiator_sid != NULL) { 1184c66ac9dbSNicholas Bellinger memset(&buf[0], 0, PR_REG_ISID_LEN); 1185e3d6f909SAndy Grover tpg->se_tpg_tfo->sess_get_initiator_sid(sess, &buf[0], 1186c66ac9dbSNicholas Bellinger PR_REG_ISID_LEN); 1187c66ac9dbSNicholas Bellinger isid_ptr = &buf[0]; 1188c66ac9dbSNicholas Bellinger } 1189c66ac9dbSNicholas Bellinger 1190c66ac9dbSNicholas Bellinger return __core_scsi3_locate_pr_reg(dev, nacl, isid_ptr); 1191c66ac9dbSNicholas Bellinger } 1192c66ac9dbSNicholas Bellinger 1193c66ac9dbSNicholas Bellinger static void core_scsi3_put_pr_reg(struct t10_pr_registration *pr_reg) 1194c66ac9dbSNicholas Bellinger { 1195c66ac9dbSNicholas Bellinger atomic_dec(&pr_reg->pr_res_holders); 1196c66ac9dbSNicholas Bellinger smp_mb__after_atomic_dec(); 1197c66ac9dbSNicholas Bellinger } 1198c66ac9dbSNicholas Bellinger 1199c66ac9dbSNicholas Bellinger static int core_scsi3_check_implict_release( 1200c66ac9dbSNicholas Bellinger struct se_device *dev, 1201c66ac9dbSNicholas Bellinger struct t10_pr_registration *pr_reg) 1202c66ac9dbSNicholas Bellinger { 1203c66ac9dbSNicholas Bellinger struct se_node_acl *nacl = pr_reg->pr_reg_nacl; 1204c66ac9dbSNicholas Bellinger struct t10_pr_registration *pr_res_holder; 1205c66ac9dbSNicholas Bellinger int ret = 0; 1206c66ac9dbSNicholas Bellinger 1207c66ac9dbSNicholas Bellinger spin_lock(&dev->dev_reservation_lock); 1208c66ac9dbSNicholas Bellinger pr_res_holder = dev->dev_pr_res_holder; 1209c66ac9dbSNicholas Bellinger if (!(pr_res_holder)) { 1210c66ac9dbSNicholas Bellinger spin_unlock(&dev->dev_reservation_lock); 1211c66ac9dbSNicholas Bellinger return ret; 1212c66ac9dbSNicholas Bellinger } 1213c66ac9dbSNicholas Bellinger if (pr_res_holder == pr_reg) { 1214c66ac9dbSNicholas Bellinger /* 1215c66ac9dbSNicholas Bellinger * Perform an implict RELEASE if the registration that 1216c66ac9dbSNicholas Bellinger * is being released is holding the reservation. 1217c66ac9dbSNicholas Bellinger * 1218c66ac9dbSNicholas Bellinger * From spc4r17, section 5.7.11.1: 1219c66ac9dbSNicholas Bellinger * 1220c66ac9dbSNicholas Bellinger * e) If the I_T nexus is the persistent reservation holder 1221c66ac9dbSNicholas Bellinger * and the persistent reservation is not an all registrants 1222c66ac9dbSNicholas Bellinger * type, then a PERSISTENT RESERVE OUT command with REGISTER 1223c66ac9dbSNicholas Bellinger * service action or REGISTER AND IGNORE EXISTING KEY 1224c66ac9dbSNicholas Bellinger * service action with the SERVICE ACTION RESERVATION KEY 1225c66ac9dbSNicholas Bellinger * field set to zero (see 5.7.11.3). 1226c66ac9dbSNicholas Bellinger */ 1227c66ac9dbSNicholas Bellinger __core_scsi3_complete_pro_release(dev, nacl, pr_reg, 0); 1228c66ac9dbSNicholas Bellinger ret = 1; 1229c66ac9dbSNicholas Bellinger /* 1230c66ac9dbSNicholas Bellinger * For 'All Registrants' reservation types, all existing 1231c66ac9dbSNicholas Bellinger * registrations are still processed as reservation holders 1232c66ac9dbSNicholas Bellinger * in core_scsi3_pr_seq_non_holder() after the initial 1233c66ac9dbSNicholas Bellinger * reservation holder is implictly released here. 1234c66ac9dbSNicholas Bellinger */ 1235c66ac9dbSNicholas Bellinger } else if (pr_reg->pr_reg_all_tg_pt && 1236c66ac9dbSNicholas Bellinger (!strcmp(pr_res_holder->pr_reg_nacl->initiatorname, 1237c66ac9dbSNicholas Bellinger pr_reg->pr_reg_nacl->initiatorname)) && 1238c66ac9dbSNicholas Bellinger (pr_res_holder->pr_res_key == pr_reg->pr_res_key)) { 1239c66ac9dbSNicholas Bellinger printk(KERN_ERR "SPC-3 PR: Unable to perform ALL_TG_PT=1" 1240c66ac9dbSNicholas Bellinger " UNREGISTER while existing reservation with matching" 1241c66ac9dbSNicholas Bellinger " key 0x%016Lx is present from another SCSI Initiator" 1242c66ac9dbSNicholas Bellinger " Port\n", pr_reg->pr_res_key); 1243e3d6f909SAndy Grover ret = -EPERM; 1244c66ac9dbSNicholas Bellinger } 1245c66ac9dbSNicholas Bellinger spin_unlock(&dev->dev_reservation_lock); 1246c66ac9dbSNicholas Bellinger 1247c66ac9dbSNicholas Bellinger return ret; 1248c66ac9dbSNicholas Bellinger } 1249c66ac9dbSNicholas Bellinger 1250c66ac9dbSNicholas Bellinger /* 1251e3d6f909SAndy Grover * Called with struct t10_reservation->registration_lock held. 1252c66ac9dbSNicholas Bellinger */ 1253c66ac9dbSNicholas Bellinger static void __core_scsi3_free_registration( 1254c66ac9dbSNicholas Bellinger struct se_device *dev, 1255c66ac9dbSNicholas Bellinger struct t10_pr_registration *pr_reg, 1256c66ac9dbSNicholas Bellinger struct list_head *preempt_and_abort_list, 1257c66ac9dbSNicholas Bellinger int dec_holders) 1258c66ac9dbSNicholas Bellinger { 1259c66ac9dbSNicholas Bellinger struct target_core_fabric_ops *tfo = 1260c66ac9dbSNicholas Bellinger pr_reg->pr_reg_nacl->se_tpg->se_tpg_tfo; 1261e3d6f909SAndy Grover struct t10_reservation *pr_tmpl = &dev->se_sub_dev->t10_pr; 1262c66ac9dbSNicholas Bellinger char i_buf[PR_REG_ISID_ID_LEN]; 1263c66ac9dbSNicholas Bellinger int prf_isid; 1264c66ac9dbSNicholas Bellinger 1265c66ac9dbSNicholas Bellinger memset(i_buf, 0, PR_REG_ISID_ID_LEN); 1266c66ac9dbSNicholas Bellinger prf_isid = core_pr_dump_initiator_port(pr_reg, &i_buf[0], 1267c66ac9dbSNicholas Bellinger PR_REG_ISID_ID_LEN); 1268c66ac9dbSNicholas Bellinger 1269c66ac9dbSNicholas Bellinger pr_reg->pr_reg_deve->def_pr_registered = 0; 1270c66ac9dbSNicholas Bellinger pr_reg->pr_reg_deve->pr_res_key = 0; 1271c66ac9dbSNicholas Bellinger list_del(&pr_reg->pr_reg_list); 1272c66ac9dbSNicholas Bellinger /* 1273c66ac9dbSNicholas Bellinger * Caller accessing *pr_reg using core_scsi3_locate_pr_reg(), 1274c66ac9dbSNicholas Bellinger * so call core_scsi3_put_pr_reg() to decrement our reference. 1275c66ac9dbSNicholas Bellinger */ 1276c66ac9dbSNicholas Bellinger if (dec_holders) 1277c66ac9dbSNicholas Bellinger core_scsi3_put_pr_reg(pr_reg); 1278c66ac9dbSNicholas Bellinger /* 1279c66ac9dbSNicholas Bellinger * Wait until all reference from any other I_T nexuses for this 1280c66ac9dbSNicholas Bellinger * *pr_reg have been released. Because list_del() is called above, 1281c66ac9dbSNicholas Bellinger * the last core_scsi3_put_pr_reg(pr_reg) will release this reference 1282c66ac9dbSNicholas Bellinger * count back to zero, and we release *pr_reg. 1283c66ac9dbSNicholas Bellinger */ 1284c66ac9dbSNicholas Bellinger while (atomic_read(&pr_reg->pr_res_holders) != 0) { 1285c66ac9dbSNicholas Bellinger spin_unlock(&pr_tmpl->registration_lock); 1286c66ac9dbSNicholas Bellinger printk("SPC-3 PR [%s] waiting for pr_res_holders\n", 1287c66ac9dbSNicholas Bellinger tfo->get_fabric_name()); 1288c66ac9dbSNicholas Bellinger cpu_relax(); 1289c66ac9dbSNicholas Bellinger spin_lock(&pr_tmpl->registration_lock); 1290c66ac9dbSNicholas Bellinger } 1291c66ac9dbSNicholas Bellinger 1292c66ac9dbSNicholas Bellinger printk(KERN_INFO "SPC-3 PR [%s] Service Action: UNREGISTER Initiator" 1293c66ac9dbSNicholas Bellinger " Node: %s%s\n", tfo->get_fabric_name(), 1294c66ac9dbSNicholas Bellinger pr_reg->pr_reg_nacl->initiatorname, 1295c66ac9dbSNicholas Bellinger (prf_isid) ? &i_buf[0] : ""); 1296c66ac9dbSNicholas Bellinger printk(KERN_INFO "SPC-3 PR [%s] for %s TCM Subsystem %s Object Target" 1297c66ac9dbSNicholas Bellinger " Port(s)\n", tfo->get_fabric_name(), 1298c66ac9dbSNicholas Bellinger (pr_reg->pr_reg_all_tg_pt) ? "ALL" : "SINGLE", 1299e3d6f909SAndy Grover dev->transport->name); 1300c66ac9dbSNicholas Bellinger printk(KERN_INFO "SPC-3 PR [%s] SA Res Key: 0x%016Lx PRgeneration:" 1301c66ac9dbSNicholas Bellinger " 0x%08x\n", tfo->get_fabric_name(), pr_reg->pr_res_key, 1302c66ac9dbSNicholas Bellinger pr_reg->pr_res_generation); 1303c66ac9dbSNicholas Bellinger 1304c66ac9dbSNicholas Bellinger if (!(preempt_and_abort_list)) { 1305c66ac9dbSNicholas Bellinger pr_reg->pr_reg_deve = NULL; 1306c66ac9dbSNicholas Bellinger pr_reg->pr_reg_nacl = NULL; 1307c66ac9dbSNicholas Bellinger kfree(pr_reg->pr_aptpl_buf); 1308c66ac9dbSNicholas Bellinger kmem_cache_free(t10_pr_reg_cache, pr_reg); 1309c66ac9dbSNicholas Bellinger return; 1310c66ac9dbSNicholas Bellinger } 1311c66ac9dbSNicholas Bellinger /* 1312c66ac9dbSNicholas Bellinger * For PREEMPT_AND_ABORT, the list of *pr_reg in preempt_and_abort_list 1313c66ac9dbSNicholas Bellinger * are released once the ABORT_TASK_SET has completed.. 1314c66ac9dbSNicholas Bellinger */ 1315c66ac9dbSNicholas Bellinger list_add_tail(&pr_reg->pr_reg_abort_list, preempt_and_abort_list); 1316c66ac9dbSNicholas Bellinger } 1317c66ac9dbSNicholas Bellinger 1318c66ac9dbSNicholas Bellinger void core_scsi3_free_pr_reg_from_nacl( 1319c66ac9dbSNicholas Bellinger struct se_device *dev, 1320c66ac9dbSNicholas Bellinger struct se_node_acl *nacl) 1321c66ac9dbSNicholas Bellinger { 1322e3d6f909SAndy Grover struct t10_reservation *pr_tmpl = &dev->se_sub_dev->t10_pr; 1323c66ac9dbSNicholas Bellinger struct t10_pr_registration *pr_reg, *pr_reg_tmp, *pr_res_holder; 1324c66ac9dbSNicholas Bellinger /* 1325c66ac9dbSNicholas Bellinger * If the passed se_node_acl matches the reservation holder, 1326c66ac9dbSNicholas Bellinger * release the reservation. 1327c66ac9dbSNicholas Bellinger */ 1328c66ac9dbSNicholas Bellinger spin_lock(&dev->dev_reservation_lock); 1329c66ac9dbSNicholas Bellinger pr_res_holder = dev->dev_pr_res_holder; 1330c66ac9dbSNicholas Bellinger if ((pr_res_holder != NULL) && 1331c66ac9dbSNicholas Bellinger (pr_res_holder->pr_reg_nacl == nacl)) 1332c66ac9dbSNicholas Bellinger __core_scsi3_complete_pro_release(dev, nacl, pr_res_holder, 0); 1333c66ac9dbSNicholas Bellinger spin_unlock(&dev->dev_reservation_lock); 1334c66ac9dbSNicholas Bellinger /* 1335c66ac9dbSNicholas Bellinger * Release any registration associated with the struct se_node_acl. 1336c66ac9dbSNicholas Bellinger */ 1337c66ac9dbSNicholas Bellinger spin_lock(&pr_tmpl->registration_lock); 1338c66ac9dbSNicholas Bellinger list_for_each_entry_safe(pr_reg, pr_reg_tmp, 1339c66ac9dbSNicholas Bellinger &pr_tmpl->registration_list, pr_reg_list) { 1340c66ac9dbSNicholas Bellinger 1341c66ac9dbSNicholas Bellinger if (pr_reg->pr_reg_nacl != nacl) 1342c66ac9dbSNicholas Bellinger continue; 1343c66ac9dbSNicholas Bellinger 1344c66ac9dbSNicholas Bellinger __core_scsi3_free_registration(dev, pr_reg, NULL, 0); 1345c66ac9dbSNicholas Bellinger } 1346c66ac9dbSNicholas Bellinger spin_unlock(&pr_tmpl->registration_lock); 1347c66ac9dbSNicholas Bellinger } 1348c66ac9dbSNicholas Bellinger 1349c66ac9dbSNicholas Bellinger void core_scsi3_free_all_registrations( 1350c66ac9dbSNicholas Bellinger struct se_device *dev) 1351c66ac9dbSNicholas Bellinger { 1352e3d6f909SAndy Grover struct t10_reservation *pr_tmpl = &dev->se_sub_dev->t10_pr; 1353c66ac9dbSNicholas Bellinger struct t10_pr_registration *pr_reg, *pr_reg_tmp, *pr_res_holder; 1354c66ac9dbSNicholas Bellinger 1355c66ac9dbSNicholas Bellinger spin_lock(&dev->dev_reservation_lock); 1356c66ac9dbSNicholas Bellinger pr_res_holder = dev->dev_pr_res_holder; 1357c66ac9dbSNicholas Bellinger if (pr_res_holder != NULL) { 1358c66ac9dbSNicholas Bellinger struct se_node_acl *pr_res_nacl = pr_res_holder->pr_reg_nacl; 1359c66ac9dbSNicholas Bellinger __core_scsi3_complete_pro_release(dev, pr_res_nacl, 1360c66ac9dbSNicholas Bellinger pr_res_holder, 0); 1361c66ac9dbSNicholas Bellinger } 1362c66ac9dbSNicholas Bellinger spin_unlock(&dev->dev_reservation_lock); 1363c66ac9dbSNicholas Bellinger 1364c66ac9dbSNicholas Bellinger spin_lock(&pr_tmpl->registration_lock); 1365c66ac9dbSNicholas Bellinger list_for_each_entry_safe(pr_reg, pr_reg_tmp, 1366c66ac9dbSNicholas Bellinger &pr_tmpl->registration_list, pr_reg_list) { 1367c66ac9dbSNicholas Bellinger 1368c66ac9dbSNicholas Bellinger __core_scsi3_free_registration(dev, pr_reg, NULL, 0); 1369c66ac9dbSNicholas Bellinger } 1370c66ac9dbSNicholas Bellinger spin_unlock(&pr_tmpl->registration_lock); 1371c66ac9dbSNicholas Bellinger 1372c66ac9dbSNicholas Bellinger spin_lock(&pr_tmpl->aptpl_reg_lock); 1373c66ac9dbSNicholas Bellinger list_for_each_entry_safe(pr_reg, pr_reg_tmp, &pr_tmpl->aptpl_reg_list, 1374c66ac9dbSNicholas Bellinger pr_reg_aptpl_list) { 1375c66ac9dbSNicholas Bellinger list_del(&pr_reg->pr_reg_aptpl_list); 1376c66ac9dbSNicholas Bellinger kfree(pr_reg->pr_aptpl_buf); 1377c66ac9dbSNicholas Bellinger kmem_cache_free(t10_pr_reg_cache, pr_reg); 1378c66ac9dbSNicholas Bellinger } 1379c66ac9dbSNicholas Bellinger spin_unlock(&pr_tmpl->aptpl_reg_lock); 1380c66ac9dbSNicholas Bellinger } 1381c66ac9dbSNicholas Bellinger 1382c66ac9dbSNicholas Bellinger static int core_scsi3_tpg_depend_item(struct se_portal_group *tpg) 1383c66ac9dbSNicholas Bellinger { 1384e3d6f909SAndy Grover return configfs_depend_item(tpg->se_tpg_tfo->tf_subsys, 1385c66ac9dbSNicholas Bellinger &tpg->tpg_group.cg_item); 1386c66ac9dbSNicholas Bellinger } 1387c66ac9dbSNicholas Bellinger 1388c66ac9dbSNicholas Bellinger static void core_scsi3_tpg_undepend_item(struct se_portal_group *tpg) 1389c66ac9dbSNicholas Bellinger { 1390e3d6f909SAndy Grover configfs_undepend_item(tpg->se_tpg_tfo->tf_subsys, 1391c66ac9dbSNicholas Bellinger &tpg->tpg_group.cg_item); 1392c66ac9dbSNicholas Bellinger 1393c66ac9dbSNicholas Bellinger atomic_dec(&tpg->tpg_pr_ref_count); 1394c66ac9dbSNicholas Bellinger smp_mb__after_atomic_dec(); 1395c66ac9dbSNicholas Bellinger } 1396c66ac9dbSNicholas Bellinger 1397c66ac9dbSNicholas Bellinger static int core_scsi3_nodeacl_depend_item(struct se_node_acl *nacl) 1398c66ac9dbSNicholas Bellinger { 1399c66ac9dbSNicholas Bellinger struct se_portal_group *tpg = nacl->se_tpg; 1400c66ac9dbSNicholas Bellinger 1401c66ac9dbSNicholas Bellinger if (nacl->dynamic_node_acl) 1402c66ac9dbSNicholas Bellinger return 0; 1403c66ac9dbSNicholas Bellinger 1404e3d6f909SAndy Grover return configfs_depend_item(tpg->se_tpg_tfo->tf_subsys, 1405c66ac9dbSNicholas Bellinger &nacl->acl_group.cg_item); 1406c66ac9dbSNicholas Bellinger } 1407c66ac9dbSNicholas Bellinger 1408c66ac9dbSNicholas Bellinger static void core_scsi3_nodeacl_undepend_item(struct se_node_acl *nacl) 1409c66ac9dbSNicholas Bellinger { 1410c66ac9dbSNicholas Bellinger struct se_portal_group *tpg = nacl->se_tpg; 1411c66ac9dbSNicholas Bellinger 1412c66ac9dbSNicholas Bellinger if (nacl->dynamic_node_acl) { 1413c66ac9dbSNicholas Bellinger atomic_dec(&nacl->acl_pr_ref_count); 1414c66ac9dbSNicholas Bellinger smp_mb__after_atomic_dec(); 1415c66ac9dbSNicholas Bellinger return; 1416c66ac9dbSNicholas Bellinger } 1417c66ac9dbSNicholas Bellinger 1418e3d6f909SAndy Grover configfs_undepend_item(tpg->se_tpg_tfo->tf_subsys, 1419c66ac9dbSNicholas Bellinger &nacl->acl_group.cg_item); 1420c66ac9dbSNicholas Bellinger 1421c66ac9dbSNicholas Bellinger atomic_dec(&nacl->acl_pr_ref_count); 1422c66ac9dbSNicholas Bellinger smp_mb__after_atomic_dec(); 1423c66ac9dbSNicholas Bellinger } 1424c66ac9dbSNicholas Bellinger 1425c66ac9dbSNicholas Bellinger static int core_scsi3_lunacl_depend_item(struct se_dev_entry *se_deve) 1426c66ac9dbSNicholas Bellinger { 1427c66ac9dbSNicholas Bellinger struct se_lun_acl *lun_acl = se_deve->se_lun_acl; 1428c66ac9dbSNicholas Bellinger struct se_node_acl *nacl; 1429c66ac9dbSNicholas Bellinger struct se_portal_group *tpg; 1430c66ac9dbSNicholas Bellinger /* 1431c66ac9dbSNicholas Bellinger * For nacl->dynamic_node_acl=1 1432c66ac9dbSNicholas Bellinger */ 1433c66ac9dbSNicholas Bellinger if (!(lun_acl)) 1434c66ac9dbSNicholas Bellinger return 0; 1435c66ac9dbSNicholas Bellinger 1436c66ac9dbSNicholas Bellinger nacl = lun_acl->se_lun_nacl; 1437c66ac9dbSNicholas Bellinger tpg = nacl->se_tpg; 1438c66ac9dbSNicholas Bellinger 1439e3d6f909SAndy Grover return configfs_depend_item(tpg->se_tpg_tfo->tf_subsys, 1440c66ac9dbSNicholas Bellinger &lun_acl->se_lun_group.cg_item); 1441c66ac9dbSNicholas Bellinger } 1442c66ac9dbSNicholas Bellinger 1443c66ac9dbSNicholas Bellinger static void core_scsi3_lunacl_undepend_item(struct se_dev_entry *se_deve) 1444c66ac9dbSNicholas Bellinger { 1445c66ac9dbSNicholas Bellinger struct se_lun_acl *lun_acl = se_deve->se_lun_acl; 1446c66ac9dbSNicholas Bellinger struct se_node_acl *nacl; 1447c66ac9dbSNicholas Bellinger struct se_portal_group *tpg; 1448c66ac9dbSNicholas Bellinger /* 1449c66ac9dbSNicholas Bellinger * For nacl->dynamic_node_acl=1 1450c66ac9dbSNicholas Bellinger */ 1451c66ac9dbSNicholas Bellinger if (!(lun_acl)) { 1452c66ac9dbSNicholas Bellinger atomic_dec(&se_deve->pr_ref_count); 1453c66ac9dbSNicholas Bellinger smp_mb__after_atomic_dec(); 1454c66ac9dbSNicholas Bellinger return; 1455c66ac9dbSNicholas Bellinger } 1456c66ac9dbSNicholas Bellinger nacl = lun_acl->se_lun_nacl; 1457c66ac9dbSNicholas Bellinger tpg = nacl->se_tpg; 1458c66ac9dbSNicholas Bellinger 1459e3d6f909SAndy Grover configfs_undepend_item(tpg->se_tpg_tfo->tf_subsys, 1460c66ac9dbSNicholas Bellinger &lun_acl->se_lun_group.cg_item); 1461c66ac9dbSNicholas Bellinger 1462c66ac9dbSNicholas Bellinger atomic_dec(&se_deve->pr_ref_count); 1463c66ac9dbSNicholas Bellinger smp_mb__after_atomic_dec(); 1464c66ac9dbSNicholas Bellinger } 1465c66ac9dbSNicholas Bellinger 1466c66ac9dbSNicholas Bellinger static int core_scsi3_decode_spec_i_port( 1467c66ac9dbSNicholas Bellinger struct se_cmd *cmd, 1468c66ac9dbSNicholas Bellinger struct se_portal_group *tpg, 1469c66ac9dbSNicholas Bellinger unsigned char *l_isid, 1470c66ac9dbSNicholas Bellinger u64 sa_res_key, 1471c66ac9dbSNicholas Bellinger int all_tg_pt, 1472c66ac9dbSNicholas Bellinger int aptpl) 1473c66ac9dbSNicholas Bellinger { 14745951146dSAndy Grover struct se_device *dev = cmd->se_dev; 1475c66ac9dbSNicholas Bellinger struct se_port *tmp_port; 1476c66ac9dbSNicholas Bellinger struct se_portal_group *dest_tpg = NULL, *tmp_tpg; 1477e3d6f909SAndy Grover struct se_session *se_sess = cmd->se_sess; 1478c66ac9dbSNicholas Bellinger struct se_node_acl *dest_node_acl = NULL; 1479c66ac9dbSNicholas Bellinger struct se_dev_entry *dest_se_deve = NULL, *local_se_deve; 1480c66ac9dbSNicholas Bellinger struct t10_pr_registration *dest_pr_reg, *local_pr_reg, *pr_reg_e; 1481c66ac9dbSNicholas Bellinger struct t10_pr_registration *pr_reg_tmp, *pr_reg_tmp_safe; 1482c66ac9dbSNicholas Bellinger struct list_head tid_dest_list; 1483c66ac9dbSNicholas Bellinger struct pr_transport_id_holder *tidh_new, *tidh, *tidh_tmp; 1484c66ac9dbSNicholas Bellinger struct target_core_fabric_ops *tmp_tf_ops; 148505d1c7c0SAndy Grover unsigned char *buf; 1486c66ac9dbSNicholas Bellinger unsigned char *ptr, *i_str = NULL, proto_ident, tmp_proto_ident; 1487c66ac9dbSNicholas Bellinger char *iport_ptr = NULL, dest_iport[64], i_buf[PR_REG_ISID_ID_LEN]; 1488c66ac9dbSNicholas Bellinger u32 tpdl, tid_len = 0; 1489c66ac9dbSNicholas Bellinger int ret, dest_local_nexus, prf_isid; 1490c66ac9dbSNicholas Bellinger u32 dest_rtpi = 0; 1491c66ac9dbSNicholas Bellinger 1492c66ac9dbSNicholas Bellinger memset(dest_iport, 0, 64); 1493c66ac9dbSNicholas Bellinger INIT_LIST_HEAD(&tid_dest_list); 1494c66ac9dbSNicholas Bellinger 1495c66ac9dbSNicholas Bellinger local_se_deve = &se_sess->se_node_acl->device_list[cmd->orig_fe_lun]; 1496c66ac9dbSNicholas Bellinger /* 1497c66ac9dbSNicholas Bellinger * Allocate a struct pr_transport_id_holder and setup the 1498c66ac9dbSNicholas Bellinger * local_node_acl and local_se_deve pointers and add to 1499c66ac9dbSNicholas Bellinger * struct list_head tid_dest_list for add registration 1500c66ac9dbSNicholas Bellinger * processing in the loop of tid_dest_list below. 1501c66ac9dbSNicholas Bellinger */ 1502c66ac9dbSNicholas Bellinger tidh_new = kzalloc(sizeof(struct pr_transport_id_holder), GFP_KERNEL); 1503c66ac9dbSNicholas Bellinger if (!(tidh_new)) { 1504c66ac9dbSNicholas Bellinger printk(KERN_ERR "Unable to allocate tidh_new\n"); 1505c66ac9dbSNicholas Bellinger return PYX_TRANSPORT_LU_COMM_FAILURE; 1506c66ac9dbSNicholas Bellinger } 1507c66ac9dbSNicholas Bellinger INIT_LIST_HEAD(&tidh_new->dest_list); 1508c66ac9dbSNicholas Bellinger tidh_new->dest_tpg = tpg; 1509c66ac9dbSNicholas Bellinger tidh_new->dest_node_acl = se_sess->se_node_acl; 1510c66ac9dbSNicholas Bellinger tidh_new->dest_se_deve = local_se_deve; 1511c66ac9dbSNicholas Bellinger 15125951146dSAndy Grover local_pr_reg = __core_scsi3_alloc_registration(cmd->se_dev, 1513c66ac9dbSNicholas Bellinger se_sess->se_node_acl, local_se_deve, l_isid, 1514c66ac9dbSNicholas Bellinger sa_res_key, all_tg_pt, aptpl); 1515c66ac9dbSNicholas Bellinger if (!(local_pr_reg)) { 1516c66ac9dbSNicholas Bellinger kfree(tidh_new); 1517c66ac9dbSNicholas Bellinger return PYX_TRANSPORT_LU_COMM_FAILURE; 1518c66ac9dbSNicholas Bellinger } 1519c66ac9dbSNicholas Bellinger tidh_new->dest_pr_reg = local_pr_reg; 1520c66ac9dbSNicholas Bellinger /* 1521c66ac9dbSNicholas Bellinger * The local I_T nexus does not hold any configfs dependances, 1522c66ac9dbSNicholas Bellinger * so we set tid_h->dest_local_nexus=1 to prevent the 1523c66ac9dbSNicholas Bellinger * configfs_undepend_item() calls in the tid_dest_list loops below. 1524c66ac9dbSNicholas Bellinger */ 1525c66ac9dbSNicholas Bellinger tidh_new->dest_local_nexus = 1; 1526c66ac9dbSNicholas Bellinger list_add_tail(&tidh_new->dest_list, &tid_dest_list); 152705d1c7c0SAndy Grover 152805d1c7c0SAndy Grover buf = transport_kmap_first_data_page(cmd); 1529c66ac9dbSNicholas Bellinger /* 1530c66ac9dbSNicholas Bellinger * For a PERSISTENT RESERVE OUT specify initiator ports payload, 1531c66ac9dbSNicholas Bellinger * first extract TransportID Parameter Data Length, and make sure 1532c66ac9dbSNicholas Bellinger * the value matches up to the SCSI expected data transfer length. 1533c66ac9dbSNicholas Bellinger */ 1534c66ac9dbSNicholas Bellinger tpdl = (buf[24] & 0xff) << 24; 1535c66ac9dbSNicholas Bellinger tpdl |= (buf[25] & 0xff) << 16; 1536c66ac9dbSNicholas Bellinger tpdl |= (buf[26] & 0xff) << 8; 1537c66ac9dbSNicholas Bellinger tpdl |= buf[27] & 0xff; 1538c66ac9dbSNicholas Bellinger 1539c66ac9dbSNicholas Bellinger if ((tpdl + 28) != cmd->data_length) { 1540c66ac9dbSNicholas Bellinger printk(KERN_ERR "SPC-3 PR: Illegal tpdl: %u + 28 byte header" 1541c66ac9dbSNicholas Bellinger " does not equal CDB data_length: %u\n", tpdl, 1542c66ac9dbSNicholas Bellinger cmd->data_length); 1543c66ac9dbSNicholas Bellinger ret = PYX_TRANSPORT_INVALID_PARAMETER_LIST; 1544c66ac9dbSNicholas Bellinger goto out; 1545c66ac9dbSNicholas Bellinger } 1546c66ac9dbSNicholas Bellinger /* 1547c66ac9dbSNicholas Bellinger * Start processing the received transport IDs using the 1548c66ac9dbSNicholas Bellinger * receiving I_T Nexus portal's fabric dependent methods to 1549c66ac9dbSNicholas Bellinger * obtain the SCSI Initiator Port/Device Identifiers. 1550c66ac9dbSNicholas Bellinger */ 1551c66ac9dbSNicholas Bellinger ptr = &buf[28]; 1552c66ac9dbSNicholas Bellinger 1553c66ac9dbSNicholas Bellinger while (tpdl > 0) { 1554c66ac9dbSNicholas Bellinger proto_ident = (ptr[0] & 0x0f); 1555c66ac9dbSNicholas Bellinger dest_tpg = NULL; 1556c66ac9dbSNicholas Bellinger 1557c66ac9dbSNicholas Bellinger spin_lock(&dev->se_port_lock); 1558c66ac9dbSNicholas Bellinger list_for_each_entry(tmp_port, &dev->dev_sep_list, sep_list) { 1559c66ac9dbSNicholas Bellinger tmp_tpg = tmp_port->sep_tpg; 1560c66ac9dbSNicholas Bellinger if (!(tmp_tpg)) 1561c66ac9dbSNicholas Bellinger continue; 1562e3d6f909SAndy Grover tmp_tf_ops = tmp_tpg->se_tpg_tfo; 1563c66ac9dbSNicholas Bellinger if (!(tmp_tf_ops)) 1564c66ac9dbSNicholas Bellinger continue; 1565c66ac9dbSNicholas Bellinger if (!(tmp_tf_ops->get_fabric_proto_ident) || 1566c66ac9dbSNicholas Bellinger !(tmp_tf_ops->tpg_parse_pr_out_transport_id)) 1567c66ac9dbSNicholas Bellinger continue; 1568c66ac9dbSNicholas Bellinger /* 1569c66ac9dbSNicholas Bellinger * Look for the matching proto_ident provided by 1570c66ac9dbSNicholas Bellinger * the received TransportID 1571c66ac9dbSNicholas Bellinger */ 1572c66ac9dbSNicholas Bellinger tmp_proto_ident = tmp_tf_ops->get_fabric_proto_ident(tmp_tpg); 1573c66ac9dbSNicholas Bellinger if (tmp_proto_ident != proto_ident) 1574c66ac9dbSNicholas Bellinger continue; 1575c66ac9dbSNicholas Bellinger dest_rtpi = tmp_port->sep_rtpi; 1576c66ac9dbSNicholas Bellinger 1577c66ac9dbSNicholas Bellinger i_str = tmp_tf_ops->tpg_parse_pr_out_transport_id( 1578c66ac9dbSNicholas Bellinger tmp_tpg, (const char *)ptr, &tid_len, 1579c66ac9dbSNicholas Bellinger &iport_ptr); 1580c66ac9dbSNicholas Bellinger if (!(i_str)) 1581c66ac9dbSNicholas Bellinger continue; 1582c66ac9dbSNicholas Bellinger 1583c66ac9dbSNicholas Bellinger atomic_inc(&tmp_tpg->tpg_pr_ref_count); 1584c66ac9dbSNicholas Bellinger smp_mb__after_atomic_inc(); 1585c66ac9dbSNicholas Bellinger spin_unlock(&dev->se_port_lock); 1586c66ac9dbSNicholas Bellinger 1587c66ac9dbSNicholas Bellinger ret = core_scsi3_tpg_depend_item(tmp_tpg); 1588c66ac9dbSNicholas Bellinger if (ret != 0) { 1589c66ac9dbSNicholas Bellinger printk(KERN_ERR " core_scsi3_tpg_depend_item()" 1590c66ac9dbSNicholas Bellinger " for tmp_tpg\n"); 1591c66ac9dbSNicholas Bellinger atomic_dec(&tmp_tpg->tpg_pr_ref_count); 1592c66ac9dbSNicholas Bellinger smp_mb__after_atomic_dec(); 1593c66ac9dbSNicholas Bellinger ret = PYX_TRANSPORT_LU_COMM_FAILURE; 1594c66ac9dbSNicholas Bellinger goto out; 1595c66ac9dbSNicholas Bellinger } 1596c66ac9dbSNicholas Bellinger /* 1597c66ac9dbSNicholas Bellinger * Locate the desination initiator ACL to be registered 1598c66ac9dbSNicholas Bellinger * from the decoded fabric module specific TransportID 1599c66ac9dbSNicholas Bellinger * at *i_str. 1600c66ac9dbSNicholas Bellinger */ 1601c66ac9dbSNicholas Bellinger spin_lock_bh(&tmp_tpg->acl_node_lock); 1602c66ac9dbSNicholas Bellinger dest_node_acl = __core_tpg_get_initiator_node_acl( 1603c66ac9dbSNicholas Bellinger tmp_tpg, i_str); 1604c66ac9dbSNicholas Bellinger if (dest_node_acl) { 1605c66ac9dbSNicholas Bellinger atomic_inc(&dest_node_acl->acl_pr_ref_count); 1606c66ac9dbSNicholas Bellinger smp_mb__after_atomic_inc(); 1607c66ac9dbSNicholas Bellinger } 1608c66ac9dbSNicholas Bellinger spin_unlock_bh(&tmp_tpg->acl_node_lock); 1609c66ac9dbSNicholas Bellinger 1610c66ac9dbSNicholas Bellinger if (!(dest_node_acl)) { 1611c66ac9dbSNicholas Bellinger core_scsi3_tpg_undepend_item(tmp_tpg); 1612c66ac9dbSNicholas Bellinger spin_lock(&dev->se_port_lock); 1613c66ac9dbSNicholas Bellinger continue; 1614c66ac9dbSNicholas Bellinger } 1615c66ac9dbSNicholas Bellinger 1616c66ac9dbSNicholas Bellinger ret = core_scsi3_nodeacl_depend_item(dest_node_acl); 1617c66ac9dbSNicholas Bellinger if (ret != 0) { 1618c66ac9dbSNicholas Bellinger printk(KERN_ERR "configfs_depend_item() failed" 1619c66ac9dbSNicholas Bellinger " for dest_node_acl->acl_group\n"); 1620c66ac9dbSNicholas Bellinger atomic_dec(&dest_node_acl->acl_pr_ref_count); 1621c66ac9dbSNicholas Bellinger smp_mb__after_atomic_dec(); 1622c66ac9dbSNicholas Bellinger core_scsi3_tpg_undepend_item(tmp_tpg); 1623c66ac9dbSNicholas Bellinger ret = PYX_TRANSPORT_LU_COMM_FAILURE; 1624c66ac9dbSNicholas Bellinger goto out; 1625c66ac9dbSNicholas Bellinger } 1626c66ac9dbSNicholas Bellinger 1627c66ac9dbSNicholas Bellinger dest_tpg = tmp_tpg; 1628c66ac9dbSNicholas Bellinger printk(KERN_INFO "SPC-3 PR SPEC_I_PT: Located %s Node:" 1629c66ac9dbSNicholas Bellinger " %s Port RTPI: %hu\n", 1630e3d6f909SAndy Grover dest_tpg->se_tpg_tfo->get_fabric_name(), 1631c66ac9dbSNicholas Bellinger dest_node_acl->initiatorname, dest_rtpi); 1632c66ac9dbSNicholas Bellinger 1633c66ac9dbSNicholas Bellinger spin_lock(&dev->se_port_lock); 1634c66ac9dbSNicholas Bellinger break; 1635c66ac9dbSNicholas Bellinger } 1636c66ac9dbSNicholas Bellinger spin_unlock(&dev->se_port_lock); 1637c66ac9dbSNicholas Bellinger 1638c66ac9dbSNicholas Bellinger if (!(dest_tpg)) { 1639c66ac9dbSNicholas Bellinger printk(KERN_ERR "SPC-3 PR SPEC_I_PT: Unable to locate" 1640c66ac9dbSNicholas Bellinger " dest_tpg\n"); 1641c66ac9dbSNicholas Bellinger ret = PYX_TRANSPORT_INVALID_PARAMETER_LIST; 1642c66ac9dbSNicholas Bellinger goto out; 1643c66ac9dbSNicholas Bellinger } 1644c66ac9dbSNicholas Bellinger #if 0 1645c66ac9dbSNicholas Bellinger printk("SPC-3 PR SPEC_I_PT: Got %s data_length: %u tpdl: %u" 1646c66ac9dbSNicholas Bellinger " tid_len: %d for %s + %s\n", 1647e3d6f909SAndy Grover dest_tpg->se_tpg_tfo->get_fabric_name(), cmd->data_length, 1648c66ac9dbSNicholas Bellinger tpdl, tid_len, i_str, iport_ptr); 1649c66ac9dbSNicholas Bellinger #endif 1650c66ac9dbSNicholas Bellinger if (tid_len > tpdl) { 1651c66ac9dbSNicholas Bellinger printk(KERN_ERR "SPC-3 PR SPEC_I_PT: Illegal tid_len:" 1652c66ac9dbSNicholas Bellinger " %u for Transport ID: %s\n", tid_len, ptr); 1653c66ac9dbSNicholas Bellinger core_scsi3_nodeacl_undepend_item(dest_node_acl); 1654c66ac9dbSNicholas Bellinger core_scsi3_tpg_undepend_item(dest_tpg); 1655c66ac9dbSNicholas Bellinger ret = PYX_TRANSPORT_INVALID_PARAMETER_LIST; 1656c66ac9dbSNicholas Bellinger goto out; 1657c66ac9dbSNicholas Bellinger } 1658c66ac9dbSNicholas Bellinger /* 1659c66ac9dbSNicholas Bellinger * Locate the desintation struct se_dev_entry pointer for matching 1660c66ac9dbSNicholas Bellinger * RELATIVE TARGET PORT IDENTIFIER on the receiving I_T Nexus 1661c66ac9dbSNicholas Bellinger * Target Port. 1662c66ac9dbSNicholas Bellinger */ 1663c66ac9dbSNicholas Bellinger dest_se_deve = core_get_se_deve_from_rtpi(dest_node_acl, 1664c66ac9dbSNicholas Bellinger dest_rtpi); 1665c66ac9dbSNicholas Bellinger if (!(dest_se_deve)) { 1666c66ac9dbSNicholas Bellinger printk(KERN_ERR "Unable to locate %s dest_se_deve" 1667c66ac9dbSNicholas Bellinger " from destination RTPI: %hu\n", 1668e3d6f909SAndy Grover dest_tpg->se_tpg_tfo->get_fabric_name(), 1669c66ac9dbSNicholas Bellinger dest_rtpi); 1670c66ac9dbSNicholas Bellinger 1671c66ac9dbSNicholas Bellinger core_scsi3_nodeacl_undepend_item(dest_node_acl); 1672c66ac9dbSNicholas Bellinger core_scsi3_tpg_undepend_item(dest_tpg); 1673c66ac9dbSNicholas Bellinger ret = PYX_TRANSPORT_INVALID_PARAMETER_LIST; 1674c66ac9dbSNicholas Bellinger goto out; 1675c66ac9dbSNicholas Bellinger } 1676c66ac9dbSNicholas Bellinger 1677c66ac9dbSNicholas Bellinger ret = core_scsi3_lunacl_depend_item(dest_se_deve); 1678c66ac9dbSNicholas Bellinger if (ret < 0) { 1679c66ac9dbSNicholas Bellinger printk(KERN_ERR "core_scsi3_lunacl_depend_item()" 1680c66ac9dbSNicholas Bellinger " failed\n"); 1681c66ac9dbSNicholas Bellinger atomic_dec(&dest_se_deve->pr_ref_count); 1682c66ac9dbSNicholas Bellinger smp_mb__after_atomic_dec(); 1683c66ac9dbSNicholas Bellinger core_scsi3_nodeacl_undepend_item(dest_node_acl); 1684c66ac9dbSNicholas Bellinger core_scsi3_tpg_undepend_item(dest_tpg); 1685c66ac9dbSNicholas Bellinger ret = PYX_TRANSPORT_LU_COMM_FAILURE; 1686c66ac9dbSNicholas Bellinger goto out; 1687c66ac9dbSNicholas Bellinger } 1688c66ac9dbSNicholas Bellinger #if 0 1689c66ac9dbSNicholas Bellinger printk(KERN_INFO "SPC-3 PR SPEC_I_PT: Located %s Node: %s" 1690c66ac9dbSNicholas Bellinger " dest_se_deve mapped_lun: %u\n", 1691e3d6f909SAndy Grover dest_tpg->se_tpg_tfo->get_fabric_name(), 1692c66ac9dbSNicholas Bellinger dest_node_acl->initiatorname, dest_se_deve->mapped_lun); 1693c66ac9dbSNicholas Bellinger #endif 1694c66ac9dbSNicholas Bellinger /* 1695c66ac9dbSNicholas Bellinger * Skip any TransportIDs that already have a registration for 1696c66ac9dbSNicholas Bellinger * this target port. 1697c66ac9dbSNicholas Bellinger */ 1698c66ac9dbSNicholas Bellinger pr_reg_e = __core_scsi3_locate_pr_reg(dev, dest_node_acl, 1699c66ac9dbSNicholas Bellinger iport_ptr); 1700c66ac9dbSNicholas Bellinger if (pr_reg_e) { 1701c66ac9dbSNicholas Bellinger core_scsi3_put_pr_reg(pr_reg_e); 1702c66ac9dbSNicholas Bellinger core_scsi3_lunacl_undepend_item(dest_se_deve); 1703c66ac9dbSNicholas Bellinger core_scsi3_nodeacl_undepend_item(dest_node_acl); 1704c66ac9dbSNicholas Bellinger core_scsi3_tpg_undepend_item(dest_tpg); 1705c66ac9dbSNicholas Bellinger ptr += tid_len; 1706c66ac9dbSNicholas Bellinger tpdl -= tid_len; 1707c66ac9dbSNicholas Bellinger tid_len = 0; 1708c66ac9dbSNicholas Bellinger continue; 1709c66ac9dbSNicholas Bellinger } 1710c66ac9dbSNicholas Bellinger /* 1711c66ac9dbSNicholas Bellinger * Allocate a struct pr_transport_id_holder and setup 1712c66ac9dbSNicholas Bellinger * the dest_node_acl and dest_se_deve pointers for the 1713c66ac9dbSNicholas Bellinger * loop below. 1714c66ac9dbSNicholas Bellinger */ 1715c66ac9dbSNicholas Bellinger tidh_new = kzalloc(sizeof(struct pr_transport_id_holder), 1716c66ac9dbSNicholas Bellinger GFP_KERNEL); 1717c66ac9dbSNicholas Bellinger if (!(tidh_new)) { 1718c66ac9dbSNicholas Bellinger printk(KERN_ERR "Unable to allocate tidh_new\n"); 1719c66ac9dbSNicholas Bellinger core_scsi3_lunacl_undepend_item(dest_se_deve); 1720c66ac9dbSNicholas Bellinger core_scsi3_nodeacl_undepend_item(dest_node_acl); 1721c66ac9dbSNicholas Bellinger core_scsi3_tpg_undepend_item(dest_tpg); 1722c66ac9dbSNicholas Bellinger ret = PYX_TRANSPORT_LU_COMM_FAILURE; 1723c66ac9dbSNicholas Bellinger goto out; 1724c66ac9dbSNicholas Bellinger } 1725c66ac9dbSNicholas Bellinger INIT_LIST_HEAD(&tidh_new->dest_list); 1726c66ac9dbSNicholas Bellinger tidh_new->dest_tpg = dest_tpg; 1727c66ac9dbSNicholas Bellinger tidh_new->dest_node_acl = dest_node_acl; 1728c66ac9dbSNicholas Bellinger tidh_new->dest_se_deve = dest_se_deve; 1729c66ac9dbSNicholas Bellinger 1730c66ac9dbSNicholas Bellinger /* 1731c66ac9dbSNicholas Bellinger * Allocate, but do NOT add the registration for the 1732c66ac9dbSNicholas Bellinger * TransportID referenced SCSI Initiator port. This 1733c66ac9dbSNicholas Bellinger * done because of the following from spc4r17 in section 1734c66ac9dbSNicholas Bellinger * 6.14.3 wrt SPEC_I_PT: 1735c66ac9dbSNicholas Bellinger * 1736c66ac9dbSNicholas Bellinger * "If a registration fails for any initiator port (e.g., if th 1737c66ac9dbSNicholas Bellinger * logical unit does not have enough resources available to 1738c66ac9dbSNicholas Bellinger * hold the registration information), no registrations shall be 1739c66ac9dbSNicholas Bellinger * made, and the command shall be terminated with 1740c66ac9dbSNicholas Bellinger * CHECK CONDITION status." 1741c66ac9dbSNicholas Bellinger * 1742c66ac9dbSNicholas Bellinger * That means we call __core_scsi3_alloc_registration() here, 1743c66ac9dbSNicholas Bellinger * and then call __core_scsi3_add_registration() in the 1744c66ac9dbSNicholas Bellinger * 2nd loop which will never fail. 1745c66ac9dbSNicholas Bellinger */ 17465951146dSAndy Grover dest_pr_reg = __core_scsi3_alloc_registration(cmd->se_dev, 1747c66ac9dbSNicholas Bellinger dest_node_acl, dest_se_deve, iport_ptr, 1748c66ac9dbSNicholas Bellinger sa_res_key, all_tg_pt, aptpl); 1749c66ac9dbSNicholas Bellinger if (!(dest_pr_reg)) { 1750c66ac9dbSNicholas Bellinger core_scsi3_lunacl_undepend_item(dest_se_deve); 1751c66ac9dbSNicholas Bellinger core_scsi3_nodeacl_undepend_item(dest_node_acl); 1752c66ac9dbSNicholas Bellinger core_scsi3_tpg_undepend_item(dest_tpg); 1753c66ac9dbSNicholas Bellinger kfree(tidh_new); 1754c66ac9dbSNicholas Bellinger ret = PYX_TRANSPORT_INVALID_PARAMETER_LIST; 1755c66ac9dbSNicholas Bellinger goto out; 1756c66ac9dbSNicholas Bellinger } 1757c66ac9dbSNicholas Bellinger tidh_new->dest_pr_reg = dest_pr_reg; 1758c66ac9dbSNicholas Bellinger list_add_tail(&tidh_new->dest_list, &tid_dest_list); 1759c66ac9dbSNicholas Bellinger 1760c66ac9dbSNicholas Bellinger ptr += tid_len; 1761c66ac9dbSNicholas Bellinger tpdl -= tid_len; 1762c66ac9dbSNicholas Bellinger tid_len = 0; 1763c66ac9dbSNicholas Bellinger 1764c66ac9dbSNicholas Bellinger } 176505d1c7c0SAndy Grover 176605d1c7c0SAndy Grover transport_kunmap_first_data_page(cmd); 176705d1c7c0SAndy Grover 1768c66ac9dbSNicholas Bellinger /* 1769c66ac9dbSNicholas Bellinger * Go ahead and create a registrations from tid_dest_list for the 1770c66ac9dbSNicholas Bellinger * SPEC_I_PT provided TransportID for the *tidh referenced dest_node_acl 1771c66ac9dbSNicholas Bellinger * and dest_se_deve. 1772c66ac9dbSNicholas Bellinger * 1773c66ac9dbSNicholas Bellinger * The SA Reservation Key from the PROUT is set for the 1774c66ac9dbSNicholas Bellinger * registration, and ALL_TG_PT is also passed. ALL_TG_PT=1 1775c66ac9dbSNicholas Bellinger * means that the TransportID Initiator port will be 1776c66ac9dbSNicholas Bellinger * registered on all of the target ports in the SCSI target device 1777c66ac9dbSNicholas Bellinger * ALL_TG_PT=0 means the registration will only be for the 1778c66ac9dbSNicholas Bellinger * SCSI target port the PROUT REGISTER with SPEC_I_PT=1 1779c66ac9dbSNicholas Bellinger * was received. 1780c66ac9dbSNicholas Bellinger */ 1781c66ac9dbSNicholas Bellinger list_for_each_entry_safe(tidh, tidh_tmp, &tid_dest_list, dest_list) { 1782c66ac9dbSNicholas Bellinger dest_tpg = tidh->dest_tpg; 1783c66ac9dbSNicholas Bellinger dest_node_acl = tidh->dest_node_acl; 1784c66ac9dbSNicholas Bellinger dest_se_deve = tidh->dest_se_deve; 1785c66ac9dbSNicholas Bellinger dest_pr_reg = tidh->dest_pr_reg; 1786c66ac9dbSNicholas Bellinger dest_local_nexus = tidh->dest_local_nexus; 1787c66ac9dbSNicholas Bellinger 1788c66ac9dbSNicholas Bellinger list_del(&tidh->dest_list); 1789c66ac9dbSNicholas Bellinger kfree(tidh); 1790c66ac9dbSNicholas Bellinger 1791c66ac9dbSNicholas Bellinger memset(i_buf, 0, PR_REG_ISID_ID_LEN); 1792c66ac9dbSNicholas Bellinger prf_isid = core_pr_dump_initiator_port(dest_pr_reg, &i_buf[0], 1793c66ac9dbSNicholas Bellinger PR_REG_ISID_ID_LEN); 1794c66ac9dbSNicholas Bellinger 17955951146dSAndy Grover __core_scsi3_add_registration(cmd->se_dev, dest_node_acl, 1796c66ac9dbSNicholas Bellinger dest_pr_reg, 0, 0); 1797c66ac9dbSNicholas Bellinger 1798c66ac9dbSNicholas Bellinger printk(KERN_INFO "SPC-3 PR [%s] SPEC_I_PT: Successfully" 1799c66ac9dbSNicholas Bellinger " registered Transport ID for Node: %s%s Mapped LUN:" 1800e3d6f909SAndy Grover " %u\n", dest_tpg->se_tpg_tfo->get_fabric_name(), 1801c66ac9dbSNicholas Bellinger dest_node_acl->initiatorname, (prf_isid) ? 1802c66ac9dbSNicholas Bellinger &i_buf[0] : "", dest_se_deve->mapped_lun); 1803c66ac9dbSNicholas Bellinger 1804c66ac9dbSNicholas Bellinger if (dest_local_nexus) 1805c66ac9dbSNicholas Bellinger continue; 1806c66ac9dbSNicholas Bellinger 1807c66ac9dbSNicholas Bellinger core_scsi3_lunacl_undepend_item(dest_se_deve); 1808c66ac9dbSNicholas Bellinger core_scsi3_nodeacl_undepend_item(dest_node_acl); 1809c66ac9dbSNicholas Bellinger core_scsi3_tpg_undepend_item(dest_tpg); 1810c66ac9dbSNicholas Bellinger } 1811c66ac9dbSNicholas Bellinger 1812c66ac9dbSNicholas Bellinger return 0; 1813c66ac9dbSNicholas Bellinger out: 181405d1c7c0SAndy Grover transport_kunmap_first_data_page(cmd); 1815c66ac9dbSNicholas Bellinger /* 1816c66ac9dbSNicholas Bellinger * For the failure case, release everything from tid_dest_list 1817c66ac9dbSNicholas Bellinger * including *dest_pr_reg and the configfs dependances.. 1818c66ac9dbSNicholas Bellinger */ 1819c66ac9dbSNicholas Bellinger list_for_each_entry_safe(tidh, tidh_tmp, &tid_dest_list, dest_list) { 1820c66ac9dbSNicholas Bellinger dest_tpg = tidh->dest_tpg; 1821c66ac9dbSNicholas Bellinger dest_node_acl = tidh->dest_node_acl; 1822c66ac9dbSNicholas Bellinger dest_se_deve = tidh->dest_se_deve; 1823c66ac9dbSNicholas Bellinger dest_pr_reg = tidh->dest_pr_reg; 1824c66ac9dbSNicholas Bellinger dest_local_nexus = tidh->dest_local_nexus; 1825c66ac9dbSNicholas Bellinger 1826c66ac9dbSNicholas Bellinger list_del(&tidh->dest_list); 1827c66ac9dbSNicholas Bellinger kfree(tidh); 1828c66ac9dbSNicholas Bellinger /* 1829c66ac9dbSNicholas Bellinger * Release any extra ALL_TG_PT=1 registrations for 1830c66ac9dbSNicholas Bellinger * the SPEC_I_PT=1 case. 1831c66ac9dbSNicholas Bellinger */ 1832c66ac9dbSNicholas Bellinger list_for_each_entry_safe(pr_reg_tmp, pr_reg_tmp_safe, 1833c66ac9dbSNicholas Bellinger &dest_pr_reg->pr_reg_atp_list, 1834c66ac9dbSNicholas Bellinger pr_reg_atp_mem_list) { 1835c66ac9dbSNicholas Bellinger list_del(&pr_reg_tmp->pr_reg_atp_mem_list); 1836c66ac9dbSNicholas Bellinger core_scsi3_lunacl_undepend_item(pr_reg_tmp->pr_reg_deve); 1837c66ac9dbSNicholas Bellinger kmem_cache_free(t10_pr_reg_cache, pr_reg_tmp); 1838c66ac9dbSNicholas Bellinger } 1839c66ac9dbSNicholas Bellinger 1840c66ac9dbSNicholas Bellinger kfree(dest_pr_reg->pr_aptpl_buf); 1841c66ac9dbSNicholas Bellinger kmem_cache_free(t10_pr_reg_cache, dest_pr_reg); 1842c66ac9dbSNicholas Bellinger 1843c66ac9dbSNicholas Bellinger if (dest_local_nexus) 1844c66ac9dbSNicholas Bellinger continue; 1845c66ac9dbSNicholas Bellinger 1846c66ac9dbSNicholas Bellinger core_scsi3_lunacl_undepend_item(dest_se_deve); 1847c66ac9dbSNicholas Bellinger core_scsi3_nodeacl_undepend_item(dest_node_acl); 1848c66ac9dbSNicholas Bellinger core_scsi3_tpg_undepend_item(dest_tpg); 1849c66ac9dbSNicholas Bellinger } 1850c66ac9dbSNicholas Bellinger return ret; 1851c66ac9dbSNicholas Bellinger } 1852c66ac9dbSNicholas Bellinger 1853c66ac9dbSNicholas Bellinger /* 1854c66ac9dbSNicholas Bellinger * Called with struct se_device->dev_reservation_lock held 1855c66ac9dbSNicholas Bellinger */ 1856c66ac9dbSNicholas Bellinger static int __core_scsi3_update_aptpl_buf( 1857c66ac9dbSNicholas Bellinger struct se_device *dev, 1858c66ac9dbSNicholas Bellinger unsigned char *buf, 1859c66ac9dbSNicholas Bellinger u32 pr_aptpl_buf_len, 1860c66ac9dbSNicholas Bellinger int clear_aptpl_metadata) 1861c66ac9dbSNicholas Bellinger { 1862c66ac9dbSNicholas Bellinger struct se_lun *lun; 1863c66ac9dbSNicholas Bellinger struct se_portal_group *tpg; 1864e3d6f909SAndy Grover struct se_subsystem_dev *su_dev = dev->se_sub_dev; 1865c66ac9dbSNicholas Bellinger struct t10_pr_registration *pr_reg; 1866c66ac9dbSNicholas Bellinger unsigned char tmp[512], isid_buf[32]; 1867c66ac9dbSNicholas Bellinger ssize_t len = 0; 1868c66ac9dbSNicholas Bellinger int reg_count = 0; 1869c66ac9dbSNicholas Bellinger 1870c66ac9dbSNicholas Bellinger memset(buf, 0, pr_aptpl_buf_len); 1871c66ac9dbSNicholas Bellinger /* 1872c66ac9dbSNicholas Bellinger * Called to clear metadata once APTPL has been deactivated. 1873c66ac9dbSNicholas Bellinger */ 1874c66ac9dbSNicholas Bellinger if (clear_aptpl_metadata) { 1875c66ac9dbSNicholas Bellinger snprintf(buf, pr_aptpl_buf_len, 1876c66ac9dbSNicholas Bellinger "No Registrations or Reservations\n"); 1877c66ac9dbSNicholas Bellinger return 0; 1878c66ac9dbSNicholas Bellinger } 1879c66ac9dbSNicholas Bellinger /* 1880c66ac9dbSNicholas Bellinger * Walk the registration list.. 1881c66ac9dbSNicholas Bellinger */ 1882e3d6f909SAndy Grover spin_lock(&su_dev->t10_pr.registration_lock); 1883e3d6f909SAndy Grover list_for_each_entry(pr_reg, &su_dev->t10_pr.registration_list, 1884c66ac9dbSNicholas Bellinger pr_reg_list) { 1885c66ac9dbSNicholas Bellinger 1886c66ac9dbSNicholas Bellinger tmp[0] = '\0'; 1887c66ac9dbSNicholas Bellinger isid_buf[0] = '\0'; 1888c66ac9dbSNicholas Bellinger tpg = pr_reg->pr_reg_nacl->se_tpg; 1889c66ac9dbSNicholas Bellinger lun = pr_reg->pr_reg_tg_pt_lun; 1890c66ac9dbSNicholas Bellinger /* 1891c66ac9dbSNicholas Bellinger * Write out any ISID value to APTPL metadata that was included 1892c66ac9dbSNicholas Bellinger * in the original registration. 1893c66ac9dbSNicholas Bellinger */ 1894c66ac9dbSNicholas Bellinger if (pr_reg->isid_present_at_reg) 1895c66ac9dbSNicholas Bellinger snprintf(isid_buf, 32, "initiator_sid=%s\n", 1896c66ac9dbSNicholas Bellinger pr_reg->pr_reg_isid); 1897c66ac9dbSNicholas Bellinger /* 1898c66ac9dbSNicholas Bellinger * Include special metadata if the pr_reg matches the 1899c66ac9dbSNicholas Bellinger * reservation holder. 1900c66ac9dbSNicholas Bellinger */ 1901c66ac9dbSNicholas Bellinger if (dev->dev_pr_res_holder == pr_reg) { 1902c66ac9dbSNicholas Bellinger snprintf(tmp, 512, "PR_REG_START: %d" 1903c66ac9dbSNicholas Bellinger "\ninitiator_fabric=%s\n" 1904c66ac9dbSNicholas Bellinger "initiator_node=%s\n%s" 1905c66ac9dbSNicholas Bellinger "sa_res_key=%llu\n" 1906c66ac9dbSNicholas Bellinger "res_holder=1\nres_type=%02x\n" 1907c66ac9dbSNicholas Bellinger "res_scope=%02x\nres_all_tg_pt=%d\n" 1908c66ac9dbSNicholas Bellinger "mapped_lun=%u\n", reg_count, 1909e3d6f909SAndy Grover tpg->se_tpg_tfo->get_fabric_name(), 1910c66ac9dbSNicholas Bellinger pr_reg->pr_reg_nacl->initiatorname, isid_buf, 1911c66ac9dbSNicholas Bellinger pr_reg->pr_res_key, pr_reg->pr_res_type, 1912c66ac9dbSNicholas Bellinger pr_reg->pr_res_scope, pr_reg->pr_reg_all_tg_pt, 1913c66ac9dbSNicholas Bellinger pr_reg->pr_res_mapped_lun); 1914c66ac9dbSNicholas Bellinger } else { 1915c66ac9dbSNicholas Bellinger snprintf(tmp, 512, "PR_REG_START: %d\n" 1916c66ac9dbSNicholas Bellinger "initiator_fabric=%s\ninitiator_node=%s\n%s" 1917c66ac9dbSNicholas Bellinger "sa_res_key=%llu\nres_holder=0\n" 1918c66ac9dbSNicholas Bellinger "res_all_tg_pt=%d\nmapped_lun=%u\n", 1919e3d6f909SAndy Grover reg_count, tpg->se_tpg_tfo->get_fabric_name(), 1920c66ac9dbSNicholas Bellinger pr_reg->pr_reg_nacl->initiatorname, isid_buf, 1921c66ac9dbSNicholas Bellinger pr_reg->pr_res_key, pr_reg->pr_reg_all_tg_pt, 1922c66ac9dbSNicholas Bellinger pr_reg->pr_res_mapped_lun); 1923c66ac9dbSNicholas Bellinger } 1924c66ac9dbSNicholas Bellinger 192560d645a4SDan Carpenter if ((len + strlen(tmp) >= pr_aptpl_buf_len)) { 1926c66ac9dbSNicholas Bellinger printk(KERN_ERR "Unable to update renaming" 1927c66ac9dbSNicholas Bellinger " APTPL metadata\n"); 1928e3d6f909SAndy Grover spin_unlock(&su_dev->t10_pr.registration_lock); 1929e3d6f909SAndy Grover return -EMSGSIZE; 1930c66ac9dbSNicholas Bellinger } 1931c66ac9dbSNicholas Bellinger len += sprintf(buf+len, "%s", tmp); 1932c66ac9dbSNicholas Bellinger 1933c66ac9dbSNicholas Bellinger /* 1934c66ac9dbSNicholas Bellinger * Include information about the associated SCSI target port. 1935c66ac9dbSNicholas Bellinger */ 1936c66ac9dbSNicholas Bellinger snprintf(tmp, 512, "target_fabric=%s\ntarget_node=%s\n" 1937c66ac9dbSNicholas Bellinger "tpgt=%hu\nport_rtpi=%hu\ntarget_lun=%u\nPR_REG_END:" 1938e3d6f909SAndy Grover " %d\n", tpg->se_tpg_tfo->get_fabric_name(), 1939e3d6f909SAndy Grover tpg->se_tpg_tfo->tpg_get_wwn(tpg), 1940e3d6f909SAndy Grover tpg->se_tpg_tfo->tpg_get_tag(tpg), 1941c66ac9dbSNicholas Bellinger lun->lun_sep->sep_rtpi, lun->unpacked_lun, reg_count); 1942c66ac9dbSNicholas Bellinger 194360d645a4SDan Carpenter if ((len + strlen(tmp) >= pr_aptpl_buf_len)) { 1944c66ac9dbSNicholas Bellinger printk(KERN_ERR "Unable to update renaming" 1945c66ac9dbSNicholas Bellinger " APTPL metadata\n"); 1946e3d6f909SAndy Grover spin_unlock(&su_dev->t10_pr.registration_lock); 1947e3d6f909SAndy Grover return -EMSGSIZE; 1948c66ac9dbSNicholas Bellinger } 1949c66ac9dbSNicholas Bellinger len += sprintf(buf+len, "%s", tmp); 1950c66ac9dbSNicholas Bellinger reg_count++; 1951c66ac9dbSNicholas Bellinger } 1952e3d6f909SAndy Grover spin_unlock(&su_dev->t10_pr.registration_lock); 1953c66ac9dbSNicholas Bellinger 1954c66ac9dbSNicholas Bellinger if (!(reg_count)) 1955c66ac9dbSNicholas Bellinger len += sprintf(buf+len, "No Registrations or Reservations"); 1956c66ac9dbSNicholas Bellinger 1957c66ac9dbSNicholas Bellinger return 0; 1958c66ac9dbSNicholas Bellinger } 1959c66ac9dbSNicholas Bellinger 1960c66ac9dbSNicholas Bellinger static int core_scsi3_update_aptpl_buf( 1961c66ac9dbSNicholas Bellinger struct se_device *dev, 1962c66ac9dbSNicholas Bellinger unsigned char *buf, 1963c66ac9dbSNicholas Bellinger u32 pr_aptpl_buf_len, 1964c66ac9dbSNicholas Bellinger int clear_aptpl_metadata) 1965c66ac9dbSNicholas Bellinger { 1966c66ac9dbSNicholas Bellinger int ret; 1967c66ac9dbSNicholas Bellinger 1968c66ac9dbSNicholas Bellinger spin_lock(&dev->dev_reservation_lock); 1969c66ac9dbSNicholas Bellinger ret = __core_scsi3_update_aptpl_buf(dev, buf, pr_aptpl_buf_len, 1970c66ac9dbSNicholas Bellinger clear_aptpl_metadata); 1971c66ac9dbSNicholas Bellinger spin_unlock(&dev->dev_reservation_lock); 1972c66ac9dbSNicholas Bellinger 1973c66ac9dbSNicholas Bellinger return ret; 1974c66ac9dbSNicholas Bellinger } 1975c66ac9dbSNicholas Bellinger 1976c66ac9dbSNicholas Bellinger /* 1977c66ac9dbSNicholas Bellinger * Called with struct se_device->aptpl_file_mutex held 1978c66ac9dbSNicholas Bellinger */ 1979c66ac9dbSNicholas Bellinger static int __core_scsi3_write_aptpl_to_file( 1980c66ac9dbSNicholas Bellinger struct se_device *dev, 1981c66ac9dbSNicholas Bellinger unsigned char *buf, 1982c66ac9dbSNicholas Bellinger u32 pr_aptpl_buf_len) 1983c66ac9dbSNicholas Bellinger { 1984e3d6f909SAndy Grover struct t10_wwn *wwn = &dev->se_sub_dev->t10_wwn; 1985c66ac9dbSNicholas Bellinger struct file *file; 1986c66ac9dbSNicholas Bellinger struct iovec iov[1]; 1987c66ac9dbSNicholas Bellinger mm_segment_t old_fs; 1988c66ac9dbSNicholas Bellinger int flags = O_RDWR | O_CREAT | O_TRUNC; 1989c66ac9dbSNicholas Bellinger char path[512]; 1990c66ac9dbSNicholas Bellinger int ret; 1991c66ac9dbSNicholas Bellinger 1992c66ac9dbSNicholas Bellinger memset(iov, 0, sizeof(struct iovec)); 1993c66ac9dbSNicholas Bellinger memset(path, 0, 512); 1994c66ac9dbSNicholas Bellinger 199560d645a4SDan Carpenter if (strlen(&wwn->unit_serial[0]) >= 512) { 1996c66ac9dbSNicholas Bellinger printk(KERN_ERR "WWN value for struct se_device does not fit" 1997c66ac9dbSNicholas Bellinger " into path buffer\n"); 1998e3d6f909SAndy Grover return -EMSGSIZE; 1999c66ac9dbSNicholas Bellinger } 2000c66ac9dbSNicholas Bellinger 2001c66ac9dbSNicholas Bellinger snprintf(path, 512, "/var/target/pr/aptpl_%s", &wwn->unit_serial[0]); 2002c66ac9dbSNicholas Bellinger file = filp_open(path, flags, 0600); 2003c66ac9dbSNicholas Bellinger if (IS_ERR(file) || !file || !file->f_dentry) { 2004c66ac9dbSNicholas Bellinger printk(KERN_ERR "filp_open(%s) for APTPL metadata" 2005c66ac9dbSNicholas Bellinger " failed\n", path); 2006e3d6f909SAndy Grover return (PTR_ERR(file) < 0 ? PTR_ERR(file) : -ENOENT); 2007c66ac9dbSNicholas Bellinger } 2008c66ac9dbSNicholas Bellinger 2009c66ac9dbSNicholas Bellinger iov[0].iov_base = &buf[0]; 2010c66ac9dbSNicholas Bellinger if (!(pr_aptpl_buf_len)) 2011c66ac9dbSNicholas Bellinger iov[0].iov_len = (strlen(&buf[0]) + 1); /* Add extra for NULL */ 2012c66ac9dbSNicholas Bellinger else 2013c66ac9dbSNicholas Bellinger iov[0].iov_len = pr_aptpl_buf_len; 2014c66ac9dbSNicholas Bellinger 2015c66ac9dbSNicholas Bellinger old_fs = get_fs(); 2016c66ac9dbSNicholas Bellinger set_fs(get_ds()); 2017c66ac9dbSNicholas Bellinger ret = vfs_writev(file, &iov[0], 1, &file->f_pos); 2018c66ac9dbSNicholas Bellinger set_fs(old_fs); 2019c66ac9dbSNicholas Bellinger 2020c66ac9dbSNicholas Bellinger if (ret < 0) { 2021c66ac9dbSNicholas Bellinger printk("Error writing APTPL metadata file: %s\n", path); 2022c66ac9dbSNicholas Bellinger filp_close(file, NULL); 2023e3d6f909SAndy Grover return -EIO; 2024c66ac9dbSNicholas Bellinger } 2025c66ac9dbSNicholas Bellinger filp_close(file, NULL); 2026c66ac9dbSNicholas Bellinger 2027c66ac9dbSNicholas Bellinger return 0; 2028c66ac9dbSNicholas Bellinger } 2029c66ac9dbSNicholas Bellinger 2030c66ac9dbSNicholas Bellinger static int core_scsi3_update_and_write_aptpl( 2031c66ac9dbSNicholas Bellinger struct se_device *dev, 2032c66ac9dbSNicholas Bellinger unsigned char *in_buf, 2033c66ac9dbSNicholas Bellinger u32 in_pr_aptpl_buf_len) 2034c66ac9dbSNicholas Bellinger { 2035c66ac9dbSNicholas Bellinger unsigned char null_buf[64], *buf; 2036c66ac9dbSNicholas Bellinger u32 pr_aptpl_buf_len; 2037c66ac9dbSNicholas Bellinger int ret, clear_aptpl_metadata = 0; 2038c66ac9dbSNicholas Bellinger /* 2039c66ac9dbSNicholas Bellinger * Can be called with a NULL pointer from PROUT service action CLEAR 2040c66ac9dbSNicholas Bellinger */ 2041c66ac9dbSNicholas Bellinger if (!(in_buf)) { 2042c66ac9dbSNicholas Bellinger memset(null_buf, 0, 64); 2043c66ac9dbSNicholas Bellinger buf = &null_buf[0]; 2044c66ac9dbSNicholas Bellinger /* 2045c66ac9dbSNicholas Bellinger * This will clear the APTPL metadata to: 2046c66ac9dbSNicholas Bellinger * "No Registrations or Reservations" status 2047c66ac9dbSNicholas Bellinger */ 2048c66ac9dbSNicholas Bellinger pr_aptpl_buf_len = 64; 2049c66ac9dbSNicholas Bellinger clear_aptpl_metadata = 1; 2050c66ac9dbSNicholas Bellinger } else { 2051c66ac9dbSNicholas Bellinger buf = in_buf; 2052c66ac9dbSNicholas Bellinger pr_aptpl_buf_len = in_pr_aptpl_buf_len; 2053c66ac9dbSNicholas Bellinger } 2054c66ac9dbSNicholas Bellinger 2055c66ac9dbSNicholas Bellinger ret = core_scsi3_update_aptpl_buf(dev, buf, pr_aptpl_buf_len, 2056c66ac9dbSNicholas Bellinger clear_aptpl_metadata); 2057c66ac9dbSNicholas Bellinger if (ret != 0) 2058e3d6f909SAndy Grover return ret; 2059c66ac9dbSNicholas Bellinger /* 2060c66ac9dbSNicholas Bellinger * __core_scsi3_write_aptpl_to_file() will call strlen() 2061c66ac9dbSNicholas Bellinger * on the passed buf to determine pr_aptpl_buf_len. 2062c66ac9dbSNicholas Bellinger */ 2063c66ac9dbSNicholas Bellinger ret = __core_scsi3_write_aptpl_to_file(dev, buf, 0); 2064c66ac9dbSNicholas Bellinger if (ret != 0) 2065e3d6f909SAndy Grover return ret; 2066c66ac9dbSNicholas Bellinger 2067c66ac9dbSNicholas Bellinger return ret; 2068c66ac9dbSNicholas Bellinger } 2069c66ac9dbSNicholas Bellinger 2070c66ac9dbSNicholas Bellinger static int core_scsi3_emulate_pro_register( 2071c66ac9dbSNicholas Bellinger struct se_cmd *cmd, 2072c66ac9dbSNicholas Bellinger u64 res_key, 2073c66ac9dbSNicholas Bellinger u64 sa_res_key, 2074c66ac9dbSNicholas Bellinger int aptpl, 2075c66ac9dbSNicholas Bellinger int all_tg_pt, 2076c66ac9dbSNicholas Bellinger int spec_i_pt, 2077c66ac9dbSNicholas Bellinger int ignore_key) 2078c66ac9dbSNicholas Bellinger { 2079e3d6f909SAndy Grover struct se_session *se_sess = cmd->se_sess; 20805951146dSAndy Grover struct se_device *dev = cmd->se_dev; 2081c66ac9dbSNicholas Bellinger struct se_dev_entry *se_deve; 2082e3d6f909SAndy Grover struct se_lun *se_lun = cmd->se_lun; 2083c66ac9dbSNicholas Bellinger struct se_portal_group *se_tpg; 2084c66ac9dbSNicholas Bellinger struct t10_pr_registration *pr_reg, *pr_reg_p, *pr_reg_tmp, *pr_reg_e; 2085e3d6f909SAndy Grover struct t10_reservation *pr_tmpl = &dev->se_sub_dev->t10_pr; 2086c66ac9dbSNicholas Bellinger /* Used for APTPL metadata w/ UNREGISTER */ 2087c66ac9dbSNicholas Bellinger unsigned char *pr_aptpl_buf = NULL; 2088c66ac9dbSNicholas Bellinger unsigned char isid_buf[PR_REG_ISID_LEN], *isid_ptr = NULL; 2089c66ac9dbSNicholas Bellinger int pr_holder = 0, ret = 0, type; 2090c66ac9dbSNicholas Bellinger 2091c66ac9dbSNicholas Bellinger if (!(se_sess) || !(se_lun)) { 2092c66ac9dbSNicholas Bellinger printk(KERN_ERR "SPC-3 PR: se_sess || struct se_lun is NULL!\n"); 2093c66ac9dbSNicholas Bellinger return PYX_TRANSPORT_LU_COMM_FAILURE; 2094c66ac9dbSNicholas Bellinger } 2095c66ac9dbSNicholas Bellinger se_tpg = se_sess->se_tpg; 2096c66ac9dbSNicholas Bellinger se_deve = &se_sess->se_node_acl->device_list[cmd->orig_fe_lun]; 2097c66ac9dbSNicholas Bellinger 2098e3d6f909SAndy Grover if (se_tpg->se_tpg_tfo->sess_get_initiator_sid) { 2099c66ac9dbSNicholas Bellinger memset(&isid_buf[0], 0, PR_REG_ISID_LEN); 2100e3d6f909SAndy Grover se_tpg->se_tpg_tfo->sess_get_initiator_sid(se_sess, &isid_buf[0], 2101c66ac9dbSNicholas Bellinger PR_REG_ISID_LEN); 2102c66ac9dbSNicholas Bellinger isid_ptr = &isid_buf[0]; 2103c66ac9dbSNicholas Bellinger } 2104c66ac9dbSNicholas Bellinger /* 2105c66ac9dbSNicholas Bellinger * Follow logic from spc4r17 Section 5.7.7, Register Behaviors Table 47 2106c66ac9dbSNicholas Bellinger */ 2107c66ac9dbSNicholas Bellinger pr_reg_e = core_scsi3_locate_pr_reg(dev, se_sess->se_node_acl, se_sess); 2108c66ac9dbSNicholas Bellinger if (!(pr_reg_e)) { 2109c66ac9dbSNicholas Bellinger if (res_key) { 2110c66ac9dbSNicholas Bellinger printk(KERN_WARNING "SPC-3 PR: Reservation Key non-zero" 2111c66ac9dbSNicholas Bellinger " for SA REGISTER, returning CONFLICT\n"); 2112c66ac9dbSNicholas Bellinger return PYX_TRANSPORT_RESERVATION_CONFLICT; 2113c66ac9dbSNicholas Bellinger } 2114c66ac9dbSNicholas Bellinger /* 2115c66ac9dbSNicholas Bellinger * Do nothing but return GOOD status. 2116c66ac9dbSNicholas Bellinger */ 2117c66ac9dbSNicholas Bellinger if (!(sa_res_key)) 2118c66ac9dbSNicholas Bellinger return PYX_TRANSPORT_SENT_TO_TRANSPORT; 2119c66ac9dbSNicholas Bellinger 2120c66ac9dbSNicholas Bellinger if (!(spec_i_pt)) { 2121c66ac9dbSNicholas Bellinger /* 2122c66ac9dbSNicholas Bellinger * Perform the Service Action REGISTER on the Initiator 2123c66ac9dbSNicholas Bellinger * Port Endpoint that the PRO was received from on the 2124c66ac9dbSNicholas Bellinger * Logical Unit of the SCSI device server. 2125c66ac9dbSNicholas Bellinger */ 21265951146dSAndy Grover ret = core_scsi3_alloc_registration(cmd->se_dev, 2127c66ac9dbSNicholas Bellinger se_sess->se_node_acl, se_deve, isid_ptr, 2128c66ac9dbSNicholas Bellinger sa_res_key, all_tg_pt, aptpl, 2129c66ac9dbSNicholas Bellinger ignore_key, 0); 2130c66ac9dbSNicholas Bellinger if (ret != 0) { 2131c66ac9dbSNicholas Bellinger printk(KERN_ERR "Unable to allocate" 2132c66ac9dbSNicholas Bellinger " struct t10_pr_registration\n"); 2133c66ac9dbSNicholas Bellinger return PYX_TRANSPORT_INVALID_PARAMETER_LIST; 2134c66ac9dbSNicholas Bellinger } 2135c66ac9dbSNicholas Bellinger } else { 2136c66ac9dbSNicholas Bellinger /* 2137c66ac9dbSNicholas Bellinger * Register both the Initiator port that received 2138c66ac9dbSNicholas Bellinger * PROUT SA REGISTER + SPEC_I_PT=1 and extract SCSI 2139c66ac9dbSNicholas Bellinger * TransportID from Parameter list and loop through 2140c66ac9dbSNicholas Bellinger * fabric dependent parameter list while calling 2141c66ac9dbSNicholas Bellinger * logic from of core_scsi3_alloc_registration() for 2142c66ac9dbSNicholas Bellinger * each TransportID provided SCSI Initiator Port/Device 2143c66ac9dbSNicholas Bellinger */ 2144c66ac9dbSNicholas Bellinger ret = core_scsi3_decode_spec_i_port(cmd, se_tpg, 2145c66ac9dbSNicholas Bellinger isid_ptr, sa_res_key, all_tg_pt, aptpl); 2146c66ac9dbSNicholas Bellinger if (ret != 0) 2147c66ac9dbSNicholas Bellinger return ret; 2148c66ac9dbSNicholas Bellinger } 2149c66ac9dbSNicholas Bellinger /* 2150c66ac9dbSNicholas Bellinger * Nothing left to do for the APTPL=0 case. 2151c66ac9dbSNicholas Bellinger */ 2152c66ac9dbSNicholas Bellinger if (!(aptpl)) { 2153c66ac9dbSNicholas Bellinger pr_tmpl->pr_aptpl_active = 0; 21545951146dSAndy Grover core_scsi3_update_and_write_aptpl(cmd->se_dev, NULL, 0); 2155c66ac9dbSNicholas Bellinger printk("SPC-3 PR: Set APTPL Bit Deactivated for" 2156c66ac9dbSNicholas Bellinger " REGISTER\n"); 2157c66ac9dbSNicholas Bellinger return 0; 2158c66ac9dbSNicholas Bellinger } 2159c66ac9dbSNicholas Bellinger /* 2160c66ac9dbSNicholas Bellinger * Locate the newly allocated local I_T Nexus *pr_reg, and 2161c66ac9dbSNicholas Bellinger * update the APTPL metadata information using its 2162c66ac9dbSNicholas Bellinger * preallocated *pr_reg->pr_aptpl_buf. 2163c66ac9dbSNicholas Bellinger */ 21645951146dSAndy Grover pr_reg = core_scsi3_locate_pr_reg(cmd->se_dev, 2165c66ac9dbSNicholas Bellinger se_sess->se_node_acl, se_sess); 2166c66ac9dbSNicholas Bellinger 21675951146dSAndy Grover ret = core_scsi3_update_and_write_aptpl(cmd->se_dev, 2168c66ac9dbSNicholas Bellinger &pr_reg->pr_aptpl_buf[0], 2169c66ac9dbSNicholas Bellinger pr_tmpl->pr_aptpl_buf_len); 2170c66ac9dbSNicholas Bellinger if (!(ret)) { 2171c66ac9dbSNicholas Bellinger pr_tmpl->pr_aptpl_active = 1; 2172c66ac9dbSNicholas Bellinger printk("SPC-3 PR: Set APTPL Bit Activated for REGISTER\n"); 2173c66ac9dbSNicholas Bellinger } 2174c66ac9dbSNicholas Bellinger 2175c66ac9dbSNicholas Bellinger core_scsi3_put_pr_reg(pr_reg); 2176c66ac9dbSNicholas Bellinger return ret; 2177c66ac9dbSNicholas Bellinger } else { 2178c66ac9dbSNicholas Bellinger /* 2179c66ac9dbSNicholas Bellinger * Locate the existing *pr_reg via struct se_node_acl pointers 2180c66ac9dbSNicholas Bellinger */ 2181c66ac9dbSNicholas Bellinger pr_reg = pr_reg_e; 2182c66ac9dbSNicholas Bellinger type = pr_reg->pr_res_type; 2183c66ac9dbSNicholas Bellinger 2184c66ac9dbSNicholas Bellinger if (!(ignore_key)) { 2185c66ac9dbSNicholas Bellinger if (res_key != pr_reg->pr_res_key) { 2186c66ac9dbSNicholas Bellinger printk(KERN_ERR "SPC-3 PR REGISTER: Received" 2187c66ac9dbSNicholas Bellinger " res_key: 0x%016Lx does not match" 2188c66ac9dbSNicholas Bellinger " existing SA REGISTER res_key:" 2189c66ac9dbSNicholas Bellinger " 0x%016Lx\n", res_key, 2190c66ac9dbSNicholas Bellinger pr_reg->pr_res_key); 2191c66ac9dbSNicholas Bellinger core_scsi3_put_pr_reg(pr_reg); 2192c66ac9dbSNicholas Bellinger return PYX_TRANSPORT_RESERVATION_CONFLICT; 2193c66ac9dbSNicholas Bellinger } 2194c66ac9dbSNicholas Bellinger } 2195c66ac9dbSNicholas Bellinger if (spec_i_pt) { 2196c66ac9dbSNicholas Bellinger printk(KERN_ERR "SPC-3 PR UNREGISTER: SPEC_I_PT" 2197c66ac9dbSNicholas Bellinger " set while sa_res_key=0\n"); 2198c66ac9dbSNicholas Bellinger core_scsi3_put_pr_reg(pr_reg); 2199c66ac9dbSNicholas Bellinger return PYX_TRANSPORT_INVALID_PARAMETER_LIST; 2200c66ac9dbSNicholas Bellinger } 2201c66ac9dbSNicholas Bellinger /* 2202c66ac9dbSNicholas Bellinger * An existing ALL_TG_PT=1 registration being released 2203c66ac9dbSNicholas Bellinger * must also set ALL_TG_PT=1 in the incoming PROUT. 2204c66ac9dbSNicholas Bellinger */ 2205c66ac9dbSNicholas Bellinger if (pr_reg->pr_reg_all_tg_pt && !(all_tg_pt)) { 2206c66ac9dbSNicholas Bellinger printk(KERN_ERR "SPC-3 PR UNREGISTER: ALL_TG_PT=1" 2207c66ac9dbSNicholas Bellinger " registration exists, but ALL_TG_PT=1 bit not" 2208c66ac9dbSNicholas Bellinger " present in received PROUT\n"); 2209c66ac9dbSNicholas Bellinger core_scsi3_put_pr_reg(pr_reg); 2210c66ac9dbSNicholas Bellinger return PYX_TRANSPORT_INVALID_CDB_FIELD; 2211c66ac9dbSNicholas Bellinger } 2212c66ac9dbSNicholas Bellinger /* 2213c66ac9dbSNicholas Bellinger * Allocate APTPL metadata buffer used for UNREGISTER ops 2214c66ac9dbSNicholas Bellinger */ 2215c66ac9dbSNicholas Bellinger if (aptpl) { 2216c66ac9dbSNicholas Bellinger pr_aptpl_buf = kzalloc(pr_tmpl->pr_aptpl_buf_len, 2217c66ac9dbSNicholas Bellinger GFP_KERNEL); 2218c66ac9dbSNicholas Bellinger if (!(pr_aptpl_buf)) { 2219c66ac9dbSNicholas Bellinger printk(KERN_ERR "Unable to allocate" 2220c66ac9dbSNicholas Bellinger " pr_aptpl_buf\n"); 2221c66ac9dbSNicholas Bellinger core_scsi3_put_pr_reg(pr_reg); 2222c66ac9dbSNicholas Bellinger return PYX_TRANSPORT_LU_COMM_FAILURE; 2223c66ac9dbSNicholas Bellinger } 2224c66ac9dbSNicholas Bellinger } 2225c66ac9dbSNicholas Bellinger /* 2226c66ac9dbSNicholas Bellinger * sa_res_key=0 Unregister Reservation Key for registered I_T 2227c66ac9dbSNicholas Bellinger * Nexus sa_res_key=1 Change Reservation Key for registered I_T 2228c66ac9dbSNicholas Bellinger * Nexus. 2229c66ac9dbSNicholas Bellinger */ 2230c66ac9dbSNicholas Bellinger if (!(sa_res_key)) { 2231c66ac9dbSNicholas Bellinger pr_holder = core_scsi3_check_implict_release( 22325951146dSAndy Grover cmd->se_dev, pr_reg); 2233c66ac9dbSNicholas Bellinger if (pr_holder < 0) { 2234c66ac9dbSNicholas Bellinger kfree(pr_aptpl_buf); 2235c66ac9dbSNicholas Bellinger core_scsi3_put_pr_reg(pr_reg); 2236c66ac9dbSNicholas Bellinger return PYX_TRANSPORT_RESERVATION_CONFLICT; 2237c66ac9dbSNicholas Bellinger } 2238c66ac9dbSNicholas Bellinger 2239c66ac9dbSNicholas Bellinger spin_lock(&pr_tmpl->registration_lock); 2240c66ac9dbSNicholas Bellinger /* 2241c66ac9dbSNicholas Bellinger * Release all ALL_TG_PT=1 for the matching SCSI Initiator Port 2242c66ac9dbSNicholas Bellinger * and matching pr_res_key. 2243c66ac9dbSNicholas Bellinger */ 2244c66ac9dbSNicholas Bellinger if (pr_reg->pr_reg_all_tg_pt) { 2245c66ac9dbSNicholas Bellinger list_for_each_entry_safe(pr_reg_p, pr_reg_tmp, 2246c66ac9dbSNicholas Bellinger &pr_tmpl->registration_list, 2247c66ac9dbSNicholas Bellinger pr_reg_list) { 2248c66ac9dbSNicholas Bellinger 2249c66ac9dbSNicholas Bellinger if (!(pr_reg_p->pr_reg_all_tg_pt)) 2250c66ac9dbSNicholas Bellinger continue; 2251c66ac9dbSNicholas Bellinger 2252c66ac9dbSNicholas Bellinger if (pr_reg_p->pr_res_key != res_key) 2253c66ac9dbSNicholas Bellinger continue; 2254c66ac9dbSNicholas Bellinger 2255c66ac9dbSNicholas Bellinger if (pr_reg == pr_reg_p) 2256c66ac9dbSNicholas Bellinger continue; 2257c66ac9dbSNicholas Bellinger 2258c66ac9dbSNicholas Bellinger if (strcmp(pr_reg->pr_reg_nacl->initiatorname, 2259c66ac9dbSNicholas Bellinger pr_reg_p->pr_reg_nacl->initiatorname)) 2260c66ac9dbSNicholas Bellinger continue; 2261c66ac9dbSNicholas Bellinger 2262c66ac9dbSNicholas Bellinger __core_scsi3_free_registration(dev, 2263c66ac9dbSNicholas Bellinger pr_reg_p, NULL, 0); 2264c66ac9dbSNicholas Bellinger } 2265c66ac9dbSNicholas Bellinger } 2266c66ac9dbSNicholas Bellinger /* 2267c66ac9dbSNicholas Bellinger * Release the calling I_T Nexus registration now.. 2268c66ac9dbSNicholas Bellinger */ 22695951146dSAndy Grover __core_scsi3_free_registration(cmd->se_dev, pr_reg, 2270c66ac9dbSNicholas Bellinger NULL, 1); 2271c66ac9dbSNicholas Bellinger /* 2272c66ac9dbSNicholas Bellinger * From spc4r17, section 5.7.11.3 Unregistering 2273c66ac9dbSNicholas Bellinger * 2274c66ac9dbSNicholas Bellinger * If the persistent reservation is a registrants only 2275c66ac9dbSNicholas Bellinger * type, the device server shall establish a unit 2276c66ac9dbSNicholas Bellinger * attention condition for the initiator port associated 2277c66ac9dbSNicholas Bellinger * with every registered I_T nexus except for the I_T 2278c66ac9dbSNicholas Bellinger * nexus on which the PERSISTENT RESERVE OUT command was 2279c66ac9dbSNicholas Bellinger * received, with the additional sense code set to 2280c66ac9dbSNicholas Bellinger * RESERVATIONS RELEASED. 2281c66ac9dbSNicholas Bellinger */ 2282c66ac9dbSNicholas Bellinger if (pr_holder && 2283c66ac9dbSNicholas Bellinger ((type == PR_TYPE_WRITE_EXCLUSIVE_REGONLY) || 2284c66ac9dbSNicholas Bellinger (type == PR_TYPE_EXCLUSIVE_ACCESS_REGONLY))) { 2285c66ac9dbSNicholas Bellinger list_for_each_entry(pr_reg_p, 2286c66ac9dbSNicholas Bellinger &pr_tmpl->registration_list, 2287c66ac9dbSNicholas Bellinger pr_reg_list) { 2288c66ac9dbSNicholas Bellinger 2289c66ac9dbSNicholas Bellinger core_scsi3_ua_allocate( 2290c66ac9dbSNicholas Bellinger pr_reg_p->pr_reg_nacl, 2291c66ac9dbSNicholas Bellinger pr_reg_p->pr_res_mapped_lun, 2292c66ac9dbSNicholas Bellinger 0x2A, 2293c66ac9dbSNicholas Bellinger ASCQ_2AH_RESERVATIONS_RELEASED); 2294c66ac9dbSNicholas Bellinger } 2295c66ac9dbSNicholas Bellinger } 2296c66ac9dbSNicholas Bellinger spin_unlock(&pr_tmpl->registration_lock); 2297c66ac9dbSNicholas Bellinger 2298c66ac9dbSNicholas Bellinger if (!(aptpl)) { 2299c66ac9dbSNicholas Bellinger pr_tmpl->pr_aptpl_active = 0; 2300c66ac9dbSNicholas Bellinger core_scsi3_update_and_write_aptpl(dev, NULL, 0); 2301c66ac9dbSNicholas Bellinger printk("SPC-3 PR: Set APTPL Bit Deactivated" 2302c66ac9dbSNicholas Bellinger " for UNREGISTER\n"); 2303c66ac9dbSNicholas Bellinger return 0; 2304c66ac9dbSNicholas Bellinger } 2305c66ac9dbSNicholas Bellinger 2306c66ac9dbSNicholas Bellinger ret = core_scsi3_update_and_write_aptpl(dev, 2307c66ac9dbSNicholas Bellinger &pr_aptpl_buf[0], 2308c66ac9dbSNicholas Bellinger pr_tmpl->pr_aptpl_buf_len); 2309c66ac9dbSNicholas Bellinger if (!(ret)) { 2310c66ac9dbSNicholas Bellinger pr_tmpl->pr_aptpl_active = 1; 2311c66ac9dbSNicholas Bellinger printk("SPC-3 PR: Set APTPL Bit Activated" 2312c66ac9dbSNicholas Bellinger " for UNREGISTER\n"); 2313c66ac9dbSNicholas Bellinger } 2314c66ac9dbSNicholas Bellinger 2315c66ac9dbSNicholas Bellinger kfree(pr_aptpl_buf); 2316c66ac9dbSNicholas Bellinger return ret; 2317c66ac9dbSNicholas Bellinger } else { 2318c66ac9dbSNicholas Bellinger /* 2319c66ac9dbSNicholas Bellinger * Increment PRgeneration counter for struct se_device" 2320c66ac9dbSNicholas Bellinger * upon a successful REGISTER, see spc4r17 section 6.3.2 2321c66ac9dbSNicholas Bellinger * READ_KEYS service action. 2322c66ac9dbSNicholas Bellinger */ 2323c66ac9dbSNicholas Bellinger pr_reg->pr_res_generation = core_scsi3_pr_generation( 23245951146dSAndy Grover cmd->se_dev); 2325c66ac9dbSNicholas Bellinger pr_reg->pr_res_key = sa_res_key; 2326c66ac9dbSNicholas Bellinger printk("SPC-3 PR [%s] REGISTER%s: Changed Reservation" 2327c66ac9dbSNicholas Bellinger " Key for %s to: 0x%016Lx PRgeneration:" 2328e3d6f909SAndy Grover " 0x%08x\n", cmd->se_tfo->get_fabric_name(), 2329c66ac9dbSNicholas Bellinger (ignore_key) ? "_AND_IGNORE_EXISTING_KEY" : "", 2330c66ac9dbSNicholas Bellinger pr_reg->pr_reg_nacl->initiatorname, 2331c66ac9dbSNicholas Bellinger pr_reg->pr_res_key, pr_reg->pr_res_generation); 2332c66ac9dbSNicholas Bellinger 2333c66ac9dbSNicholas Bellinger if (!(aptpl)) { 2334c66ac9dbSNicholas Bellinger pr_tmpl->pr_aptpl_active = 0; 2335c66ac9dbSNicholas Bellinger core_scsi3_update_and_write_aptpl(dev, NULL, 0); 2336c66ac9dbSNicholas Bellinger core_scsi3_put_pr_reg(pr_reg); 2337c66ac9dbSNicholas Bellinger printk("SPC-3 PR: Set APTPL Bit Deactivated" 2338c66ac9dbSNicholas Bellinger " for REGISTER\n"); 2339c66ac9dbSNicholas Bellinger return 0; 2340c66ac9dbSNicholas Bellinger } 2341c66ac9dbSNicholas Bellinger 2342c66ac9dbSNicholas Bellinger ret = core_scsi3_update_and_write_aptpl(dev, 2343c66ac9dbSNicholas Bellinger &pr_aptpl_buf[0], 2344c66ac9dbSNicholas Bellinger pr_tmpl->pr_aptpl_buf_len); 2345c66ac9dbSNicholas Bellinger if (!(ret)) { 2346c66ac9dbSNicholas Bellinger pr_tmpl->pr_aptpl_active = 1; 2347c66ac9dbSNicholas Bellinger printk("SPC-3 PR: Set APTPL Bit Activated" 2348c66ac9dbSNicholas Bellinger " for REGISTER\n"); 2349c66ac9dbSNicholas Bellinger } 2350c66ac9dbSNicholas Bellinger 2351c66ac9dbSNicholas Bellinger kfree(pr_aptpl_buf); 2352c66ac9dbSNicholas Bellinger core_scsi3_put_pr_reg(pr_reg); 2353c66ac9dbSNicholas Bellinger } 2354c66ac9dbSNicholas Bellinger } 2355c66ac9dbSNicholas Bellinger return 0; 2356c66ac9dbSNicholas Bellinger } 2357c66ac9dbSNicholas Bellinger 2358c66ac9dbSNicholas Bellinger unsigned char *core_scsi3_pr_dump_type(int type) 2359c66ac9dbSNicholas Bellinger { 2360c66ac9dbSNicholas Bellinger switch (type) { 2361c66ac9dbSNicholas Bellinger case PR_TYPE_WRITE_EXCLUSIVE: 2362c66ac9dbSNicholas Bellinger return "Write Exclusive Access"; 2363c66ac9dbSNicholas Bellinger case PR_TYPE_EXCLUSIVE_ACCESS: 2364c66ac9dbSNicholas Bellinger return "Exclusive Access"; 2365c66ac9dbSNicholas Bellinger case PR_TYPE_WRITE_EXCLUSIVE_REGONLY: 2366c66ac9dbSNicholas Bellinger return "Write Exclusive Access, Registrants Only"; 2367c66ac9dbSNicholas Bellinger case PR_TYPE_EXCLUSIVE_ACCESS_REGONLY: 2368c66ac9dbSNicholas Bellinger return "Exclusive Access, Registrants Only"; 2369c66ac9dbSNicholas Bellinger case PR_TYPE_WRITE_EXCLUSIVE_ALLREG: 2370c66ac9dbSNicholas Bellinger return "Write Exclusive Access, All Registrants"; 2371c66ac9dbSNicholas Bellinger case PR_TYPE_EXCLUSIVE_ACCESS_ALLREG: 2372c66ac9dbSNicholas Bellinger return "Exclusive Access, All Registrants"; 2373c66ac9dbSNicholas Bellinger default: 2374c66ac9dbSNicholas Bellinger break; 2375c66ac9dbSNicholas Bellinger } 2376c66ac9dbSNicholas Bellinger 2377c66ac9dbSNicholas Bellinger return "Unknown SPC-3 PR Type"; 2378c66ac9dbSNicholas Bellinger } 2379c66ac9dbSNicholas Bellinger 2380c66ac9dbSNicholas Bellinger static int core_scsi3_pro_reserve( 2381c66ac9dbSNicholas Bellinger struct se_cmd *cmd, 2382c66ac9dbSNicholas Bellinger struct se_device *dev, 2383c66ac9dbSNicholas Bellinger int type, 2384c66ac9dbSNicholas Bellinger int scope, 2385c66ac9dbSNicholas Bellinger u64 res_key) 2386c66ac9dbSNicholas Bellinger { 2387e3d6f909SAndy Grover struct se_session *se_sess = cmd->se_sess; 2388c66ac9dbSNicholas Bellinger struct se_dev_entry *se_deve; 2389e3d6f909SAndy Grover struct se_lun *se_lun = cmd->se_lun; 2390c66ac9dbSNicholas Bellinger struct se_portal_group *se_tpg; 2391c66ac9dbSNicholas Bellinger struct t10_pr_registration *pr_reg, *pr_res_holder; 2392e3d6f909SAndy Grover struct t10_reservation *pr_tmpl = &dev->se_sub_dev->t10_pr; 2393c66ac9dbSNicholas Bellinger char i_buf[PR_REG_ISID_ID_LEN]; 2394c66ac9dbSNicholas Bellinger int ret, prf_isid; 2395c66ac9dbSNicholas Bellinger 2396c66ac9dbSNicholas Bellinger memset(i_buf, 0, PR_REG_ISID_ID_LEN); 2397c66ac9dbSNicholas Bellinger 2398c66ac9dbSNicholas Bellinger if (!(se_sess) || !(se_lun)) { 2399c66ac9dbSNicholas Bellinger printk(KERN_ERR "SPC-3 PR: se_sess || struct se_lun is NULL!\n"); 2400c66ac9dbSNicholas Bellinger return PYX_TRANSPORT_LU_COMM_FAILURE; 2401c66ac9dbSNicholas Bellinger } 2402c66ac9dbSNicholas Bellinger se_tpg = se_sess->se_tpg; 2403c66ac9dbSNicholas Bellinger se_deve = &se_sess->se_node_acl->device_list[cmd->orig_fe_lun]; 2404c66ac9dbSNicholas Bellinger /* 2405c66ac9dbSNicholas Bellinger * Locate the existing *pr_reg via struct se_node_acl pointers 2406c66ac9dbSNicholas Bellinger */ 24075951146dSAndy Grover pr_reg = core_scsi3_locate_pr_reg(cmd->se_dev, se_sess->se_node_acl, 2408c66ac9dbSNicholas Bellinger se_sess); 2409c66ac9dbSNicholas Bellinger if (!(pr_reg)) { 2410c66ac9dbSNicholas Bellinger printk(KERN_ERR "SPC-3 PR: Unable to locate" 2411c66ac9dbSNicholas Bellinger " PR_REGISTERED *pr_reg for RESERVE\n"); 2412c66ac9dbSNicholas Bellinger return PYX_TRANSPORT_LU_COMM_FAILURE; 2413c66ac9dbSNicholas Bellinger } 2414c66ac9dbSNicholas Bellinger /* 2415c66ac9dbSNicholas Bellinger * From spc4r17 Section 5.7.9: Reserving: 2416c66ac9dbSNicholas Bellinger * 2417c66ac9dbSNicholas Bellinger * An application client creates a persistent reservation by issuing 2418c66ac9dbSNicholas Bellinger * a PERSISTENT RESERVE OUT command with RESERVE service action through 2419c66ac9dbSNicholas Bellinger * a registered I_T nexus with the following parameters: 2420c66ac9dbSNicholas Bellinger * a) RESERVATION KEY set to the value of the reservation key that is 2421c66ac9dbSNicholas Bellinger * registered with the logical unit for the I_T nexus; and 2422c66ac9dbSNicholas Bellinger */ 2423c66ac9dbSNicholas Bellinger if (res_key != pr_reg->pr_res_key) { 2424c66ac9dbSNicholas Bellinger printk(KERN_ERR "SPC-3 PR RESERVE: Received res_key: 0x%016Lx" 2425c66ac9dbSNicholas Bellinger " does not match existing SA REGISTER res_key:" 2426c66ac9dbSNicholas Bellinger " 0x%016Lx\n", res_key, pr_reg->pr_res_key); 2427c66ac9dbSNicholas Bellinger core_scsi3_put_pr_reg(pr_reg); 2428c66ac9dbSNicholas Bellinger return PYX_TRANSPORT_RESERVATION_CONFLICT; 2429c66ac9dbSNicholas Bellinger } 2430c66ac9dbSNicholas Bellinger /* 2431c66ac9dbSNicholas Bellinger * From spc4r17 Section 5.7.9: Reserving: 2432c66ac9dbSNicholas Bellinger * 2433c66ac9dbSNicholas Bellinger * From above: 2434c66ac9dbSNicholas Bellinger * b) TYPE field and SCOPE field set to the persistent reservation 2435c66ac9dbSNicholas Bellinger * being created. 2436c66ac9dbSNicholas Bellinger * 2437c66ac9dbSNicholas Bellinger * Only one persistent reservation is allowed at a time per logical unit 2438c66ac9dbSNicholas Bellinger * and that persistent reservation has a scope of LU_SCOPE. 2439c66ac9dbSNicholas Bellinger */ 2440c66ac9dbSNicholas Bellinger if (scope != PR_SCOPE_LU_SCOPE) { 2441c66ac9dbSNicholas Bellinger printk(KERN_ERR "SPC-3 PR: Illegal SCOPE: 0x%02x\n", scope); 2442c66ac9dbSNicholas Bellinger core_scsi3_put_pr_reg(pr_reg); 2443c66ac9dbSNicholas Bellinger return PYX_TRANSPORT_INVALID_PARAMETER_LIST; 2444c66ac9dbSNicholas Bellinger } 2445c66ac9dbSNicholas Bellinger /* 2446c66ac9dbSNicholas Bellinger * See if we have an existing PR reservation holder pointer at 2447c66ac9dbSNicholas Bellinger * struct se_device->dev_pr_res_holder in the form struct t10_pr_registration 2448c66ac9dbSNicholas Bellinger * *pr_res_holder. 2449c66ac9dbSNicholas Bellinger */ 2450c66ac9dbSNicholas Bellinger spin_lock(&dev->dev_reservation_lock); 2451c66ac9dbSNicholas Bellinger pr_res_holder = dev->dev_pr_res_holder; 2452c66ac9dbSNicholas Bellinger if ((pr_res_holder)) { 2453c66ac9dbSNicholas Bellinger /* 2454c66ac9dbSNicholas Bellinger * From spc4r17 Section 5.7.9: Reserving: 2455c66ac9dbSNicholas Bellinger * 2456c66ac9dbSNicholas Bellinger * If the device server receives a PERSISTENT RESERVE OUT 2457c66ac9dbSNicholas Bellinger * command from an I_T nexus other than a persistent reservation 2458c66ac9dbSNicholas Bellinger * holder (see 5.7.10) that attempts to create a persistent 2459c66ac9dbSNicholas Bellinger * reservation when a persistent reservation already exists for 2460c66ac9dbSNicholas Bellinger * the logical unit, then the command shall be completed with 2461c66ac9dbSNicholas Bellinger * RESERVATION CONFLICT status. 2462c66ac9dbSNicholas Bellinger */ 2463c66ac9dbSNicholas Bellinger if (pr_res_holder != pr_reg) { 2464c66ac9dbSNicholas Bellinger struct se_node_acl *pr_res_nacl = pr_res_holder->pr_reg_nacl; 2465c66ac9dbSNicholas Bellinger printk(KERN_ERR "SPC-3 PR: Attempted RESERVE from" 2466c66ac9dbSNicholas Bellinger " [%s]: %s while reservation already held by" 2467c66ac9dbSNicholas Bellinger " [%s]: %s, returning RESERVATION_CONFLICT\n", 2468e3d6f909SAndy Grover cmd->se_tfo->get_fabric_name(), 2469c66ac9dbSNicholas Bellinger se_sess->se_node_acl->initiatorname, 2470e3d6f909SAndy Grover pr_res_nacl->se_tpg->se_tpg_tfo->get_fabric_name(), 2471c66ac9dbSNicholas Bellinger pr_res_holder->pr_reg_nacl->initiatorname); 2472c66ac9dbSNicholas Bellinger 2473c66ac9dbSNicholas Bellinger spin_unlock(&dev->dev_reservation_lock); 2474c66ac9dbSNicholas Bellinger core_scsi3_put_pr_reg(pr_reg); 2475c66ac9dbSNicholas Bellinger return PYX_TRANSPORT_RESERVATION_CONFLICT; 2476c66ac9dbSNicholas Bellinger } 2477c66ac9dbSNicholas Bellinger /* 2478c66ac9dbSNicholas Bellinger * From spc4r17 Section 5.7.9: Reserving: 2479c66ac9dbSNicholas Bellinger * 2480c66ac9dbSNicholas Bellinger * If a persistent reservation holder attempts to modify the 2481c66ac9dbSNicholas Bellinger * type or scope of an existing persistent reservation, the 2482c66ac9dbSNicholas Bellinger * command shall be completed with RESERVATION CONFLICT status. 2483c66ac9dbSNicholas Bellinger */ 2484c66ac9dbSNicholas Bellinger if ((pr_res_holder->pr_res_type != type) || 2485c66ac9dbSNicholas Bellinger (pr_res_holder->pr_res_scope != scope)) { 2486c66ac9dbSNicholas Bellinger struct se_node_acl *pr_res_nacl = pr_res_holder->pr_reg_nacl; 2487c66ac9dbSNicholas Bellinger printk(KERN_ERR "SPC-3 PR: Attempted RESERVE from" 2488c66ac9dbSNicholas Bellinger " [%s]: %s trying to change TYPE and/or SCOPE," 2489c66ac9dbSNicholas Bellinger " while reservation already held by [%s]: %s," 2490c66ac9dbSNicholas Bellinger " returning RESERVATION_CONFLICT\n", 2491e3d6f909SAndy Grover cmd->se_tfo->get_fabric_name(), 2492c66ac9dbSNicholas Bellinger se_sess->se_node_acl->initiatorname, 2493e3d6f909SAndy Grover pr_res_nacl->se_tpg->se_tpg_tfo->get_fabric_name(), 2494c66ac9dbSNicholas Bellinger pr_res_holder->pr_reg_nacl->initiatorname); 2495c66ac9dbSNicholas Bellinger 2496c66ac9dbSNicholas Bellinger spin_unlock(&dev->dev_reservation_lock); 2497c66ac9dbSNicholas Bellinger core_scsi3_put_pr_reg(pr_reg); 2498c66ac9dbSNicholas Bellinger return PYX_TRANSPORT_RESERVATION_CONFLICT; 2499c66ac9dbSNicholas Bellinger } 2500c66ac9dbSNicholas Bellinger /* 2501c66ac9dbSNicholas Bellinger * From spc4r17 Section 5.7.9: Reserving: 2502c66ac9dbSNicholas Bellinger * 2503c66ac9dbSNicholas Bellinger * If the device server receives a PERSISTENT RESERVE OUT 2504c66ac9dbSNicholas Bellinger * command with RESERVE service action where the TYPE field and 2505c66ac9dbSNicholas Bellinger * the SCOPE field contain the same values as the existing type 2506c66ac9dbSNicholas Bellinger * and scope from a persistent reservation holder, it shall not 2507c66ac9dbSNicholas Bellinger * make any change to the existing persistent reservation and 2508c66ac9dbSNicholas Bellinger * shall completethe command with GOOD status. 2509c66ac9dbSNicholas Bellinger */ 2510c66ac9dbSNicholas Bellinger spin_unlock(&dev->dev_reservation_lock); 2511c66ac9dbSNicholas Bellinger core_scsi3_put_pr_reg(pr_reg); 2512c66ac9dbSNicholas Bellinger return PYX_TRANSPORT_SENT_TO_TRANSPORT; 2513c66ac9dbSNicholas Bellinger } 2514c66ac9dbSNicholas Bellinger /* 2515c66ac9dbSNicholas Bellinger * Otherwise, our *pr_reg becomes the PR reservation holder for said 2516c66ac9dbSNicholas Bellinger * TYPE/SCOPE. Also set the received scope and type in *pr_reg. 2517c66ac9dbSNicholas Bellinger */ 2518c66ac9dbSNicholas Bellinger pr_reg->pr_res_scope = scope; 2519c66ac9dbSNicholas Bellinger pr_reg->pr_res_type = type; 2520c66ac9dbSNicholas Bellinger pr_reg->pr_res_holder = 1; 2521c66ac9dbSNicholas Bellinger dev->dev_pr_res_holder = pr_reg; 2522c66ac9dbSNicholas Bellinger prf_isid = core_pr_dump_initiator_port(pr_reg, &i_buf[0], 2523c66ac9dbSNicholas Bellinger PR_REG_ISID_ID_LEN); 2524c66ac9dbSNicholas Bellinger 2525c66ac9dbSNicholas Bellinger printk(KERN_INFO "SPC-3 PR [%s] Service Action: RESERVE created new" 2526c66ac9dbSNicholas Bellinger " reservation holder TYPE: %s ALL_TG_PT: %d\n", 2527e3d6f909SAndy Grover cmd->se_tfo->get_fabric_name(), core_scsi3_pr_dump_type(type), 2528c66ac9dbSNicholas Bellinger (pr_reg->pr_reg_all_tg_pt) ? 1 : 0); 2529c66ac9dbSNicholas Bellinger printk(KERN_INFO "SPC-3 PR [%s] RESERVE Node: %s%s\n", 2530e3d6f909SAndy Grover cmd->se_tfo->get_fabric_name(), 2531c66ac9dbSNicholas Bellinger se_sess->se_node_acl->initiatorname, 2532c66ac9dbSNicholas Bellinger (prf_isid) ? &i_buf[0] : ""); 2533c66ac9dbSNicholas Bellinger spin_unlock(&dev->dev_reservation_lock); 2534c66ac9dbSNicholas Bellinger 2535c66ac9dbSNicholas Bellinger if (pr_tmpl->pr_aptpl_active) { 25365951146dSAndy Grover ret = core_scsi3_update_and_write_aptpl(cmd->se_dev, 2537c66ac9dbSNicholas Bellinger &pr_reg->pr_aptpl_buf[0], 2538c66ac9dbSNicholas Bellinger pr_tmpl->pr_aptpl_buf_len); 2539c66ac9dbSNicholas Bellinger if (!(ret)) 2540c66ac9dbSNicholas Bellinger printk(KERN_INFO "SPC-3 PR: Updated APTPL metadata" 2541c66ac9dbSNicholas Bellinger " for RESERVE\n"); 2542c66ac9dbSNicholas Bellinger } 2543c66ac9dbSNicholas Bellinger 2544c66ac9dbSNicholas Bellinger core_scsi3_put_pr_reg(pr_reg); 2545c66ac9dbSNicholas Bellinger return 0; 2546c66ac9dbSNicholas Bellinger } 2547c66ac9dbSNicholas Bellinger 2548c66ac9dbSNicholas Bellinger static int core_scsi3_emulate_pro_reserve( 2549c66ac9dbSNicholas Bellinger struct se_cmd *cmd, 2550c66ac9dbSNicholas Bellinger int type, 2551c66ac9dbSNicholas Bellinger int scope, 2552c66ac9dbSNicholas Bellinger u64 res_key) 2553c66ac9dbSNicholas Bellinger { 2554c66ac9dbSNicholas Bellinger struct se_device *dev = cmd->se_dev; 2555c66ac9dbSNicholas Bellinger int ret = 0; 2556c66ac9dbSNicholas Bellinger 2557c66ac9dbSNicholas Bellinger switch (type) { 2558c66ac9dbSNicholas Bellinger case PR_TYPE_WRITE_EXCLUSIVE: 2559c66ac9dbSNicholas Bellinger case PR_TYPE_EXCLUSIVE_ACCESS: 2560c66ac9dbSNicholas Bellinger case PR_TYPE_WRITE_EXCLUSIVE_REGONLY: 2561c66ac9dbSNicholas Bellinger case PR_TYPE_EXCLUSIVE_ACCESS_REGONLY: 2562c66ac9dbSNicholas Bellinger case PR_TYPE_WRITE_EXCLUSIVE_ALLREG: 2563c66ac9dbSNicholas Bellinger case PR_TYPE_EXCLUSIVE_ACCESS_ALLREG: 2564c66ac9dbSNicholas Bellinger ret = core_scsi3_pro_reserve(cmd, dev, type, scope, res_key); 2565c66ac9dbSNicholas Bellinger break; 2566c66ac9dbSNicholas Bellinger default: 2567c66ac9dbSNicholas Bellinger printk(KERN_ERR "SPC-3 PR: Unknown Service Action RESERVE Type:" 2568c66ac9dbSNicholas Bellinger " 0x%02x\n", type); 2569c66ac9dbSNicholas Bellinger return PYX_TRANSPORT_INVALID_CDB_FIELD; 2570c66ac9dbSNicholas Bellinger } 2571c66ac9dbSNicholas Bellinger 2572c66ac9dbSNicholas Bellinger return ret; 2573c66ac9dbSNicholas Bellinger } 2574c66ac9dbSNicholas Bellinger 2575c66ac9dbSNicholas Bellinger /* 2576c66ac9dbSNicholas Bellinger * Called with struct se_device->dev_reservation_lock held. 2577c66ac9dbSNicholas Bellinger */ 2578c66ac9dbSNicholas Bellinger static void __core_scsi3_complete_pro_release( 2579c66ac9dbSNicholas Bellinger struct se_device *dev, 2580c66ac9dbSNicholas Bellinger struct se_node_acl *se_nacl, 2581c66ac9dbSNicholas Bellinger struct t10_pr_registration *pr_reg, 2582c66ac9dbSNicholas Bellinger int explict) 2583c66ac9dbSNicholas Bellinger { 2584c66ac9dbSNicholas Bellinger struct target_core_fabric_ops *tfo = se_nacl->se_tpg->se_tpg_tfo; 2585c66ac9dbSNicholas Bellinger char i_buf[PR_REG_ISID_ID_LEN]; 2586c66ac9dbSNicholas Bellinger int prf_isid; 2587c66ac9dbSNicholas Bellinger 2588c66ac9dbSNicholas Bellinger memset(i_buf, 0, PR_REG_ISID_ID_LEN); 2589c66ac9dbSNicholas Bellinger prf_isid = core_pr_dump_initiator_port(pr_reg, &i_buf[0], 2590c66ac9dbSNicholas Bellinger PR_REG_ISID_ID_LEN); 2591c66ac9dbSNicholas Bellinger /* 2592c66ac9dbSNicholas Bellinger * Go ahead and release the current PR reservation holder. 2593c66ac9dbSNicholas Bellinger */ 2594c66ac9dbSNicholas Bellinger dev->dev_pr_res_holder = NULL; 2595c66ac9dbSNicholas Bellinger 2596c66ac9dbSNicholas Bellinger printk(KERN_INFO "SPC-3 PR [%s] Service Action: %s RELEASE cleared" 2597c66ac9dbSNicholas Bellinger " reservation holder TYPE: %s ALL_TG_PT: %d\n", 2598c66ac9dbSNicholas Bellinger tfo->get_fabric_name(), (explict) ? "explict" : "implict", 2599c66ac9dbSNicholas Bellinger core_scsi3_pr_dump_type(pr_reg->pr_res_type), 2600c66ac9dbSNicholas Bellinger (pr_reg->pr_reg_all_tg_pt) ? 1 : 0); 2601c66ac9dbSNicholas Bellinger printk(KERN_INFO "SPC-3 PR [%s] RELEASE Node: %s%s\n", 2602c66ac9dbSNicholas Bellinger tfo->get_fabric_name(), se_nacl->initiatorname, 2603c66ac9dbSNicholas Bellinger (prf_isid) ? &i_buf[0] : ""); 2604c66ac9dbSNicholas Bellinger /* 2605c66ac9dbSNicholas Bellinger * Clear TYPE and SCOPE for the next PROUT Service Action: RESERVE 2606c66ac9dbSNicholas Bellinger */ 2607c66ac9dbSNicholas Bellinger pr_reg->pr_res_holder = pr_reg->pr_res_type = pr_reg->pr_res_scope = 0; 2608c66ac9dbSNicholas Bellinger } 2609c66ac9dbSNicholas Bellinger 2610c66ac9dbSNicholas Bellinger static int core_scsi3_emulate_pro_release( 2611c66ac9dbSNicholas Bellinger struct se_cmd *cmd, 2612c66ac9dbSNicholas Bellinger int type, 2613c66ac9dbSNicholas Bellinger int scope, 2614c66ac9dbSNicholas Bellinger u64 res_key) 2615c66ac9dbSNicholas Bellinger { 2616c66ac9dbSNicholas Bellinger struct se_device *dev = cmd->se_dev; 2617e3d6f909SAndy Grover struct se_session *se_sess = cmd->se_sess; 2618e3d6f909SAndy Grover struct se_lun *se_lun = cmd->se_lun; 2619c66ac9dbSNicholas Bellinger struct t10_pr_registration *pr_reg, *pr_reg_p, *pr_res_holder; 2620e3d6f909SAndy Grover struct t10_reservation *pr_tmpl = &dev->se_sub_dev->t10_pr; 2621c66ac9dbSNicholas Bellinger int ret, all_reg = 0; 2622c66ac9dbSNicholas Bellinger 2623c66ac9dbSNicholas Bellinger if (!(se_sess) || !(se_lun)) { 2624c66ac9dbSNicholas Bellinger printk(KERN_ERR "SPC-3 PR: se_sess || struct se_lun is NULL!\n"); 2625c66ac9dbSNicholas Bellinger return PYX_TRANSPORT_LU_COMM_FAILURE; 2626c66ac9dbSNicholas Bellinger } 2627c66ac9dbSNicholas Bellinger /* 2628c66ac9dbSNicholas Bellinger * Locate the existing *pr_reg via struct se_node_acl pointers 2629c66ac9dbSNicholas Bellinger */ 2630c66ac9dbSNicholas Bellinger pr_reg = core_scsi3_locate_pr_reg(dev, se_sess->se_node_acl, se_sess); 2631c66ac9dbSNicholas Bellinger if (!(pr_reg)) { 2632c66ac9dbSNicholas Bellinger printk(KERN_ERR "SPC-3 PR: Unable to locate" 2633c66ac9dbSNicholas Bellinger " PR_REGISTERED *pr_reg for RELEASE\n"); 2634c66ac9dbSNicholas Bellinger return PYX_TRANSPORT_LU_COMM_FAILURE; 2635c66ac9dbSNicholas Bellinger } 2636c66ac9dbSNicholas Bellinger /* 2637c66ac9dbSNicholas Bellinger * From spc4r17 Section 5.7.11.2 Releasing: 2638c66ac9dbSNicholas Bellinger * 2639c66ac9dbSNicholas Bellinger * If there is no persistent reservation or in response to a persistent 2640c66ac9dbSNicholas Bellinger * reservation release request from a registered I_T nexus that is not a 2641c66ac9dbSNicholas Bellinger * persistent reservation holder (see 5.7.10), the device server shall 2642c66ac9dbSNicholas Bellinger * do the following: 2643c66ac9dbSNicholas Bellinger * 2644c66ac9dbSNicholas Bellinger * a) Not release the persistent reservation, if any; 2645c66ac9dbSNicholas Bellinger * b) Not remove any registrations; and 2646c66ac9dbSNicholas Bellinger * c) Complete the command with GOOD status. 2647c66ac9dbSNicholas Bellinger */ 2648c66ac9dbSNicholas Bellinger spin_lock(&dev->dev_reservation_lock); 2649c66ac9dbSNicholas Bellinger pr_res_holder = dev->dev_pr_res_holder; 2650c66ac9dbSNicholas Bellinger if (!(pr_res_holder)) { 2651c66ac9dbSNicholas Bellinger /* 2652c66ac9dbSNicholas Bellinger * No persistent reservation, return GOOD status. 2653c66ac9dbSNicholas Bellinger */ 2654c66ac9dbSNicholas Bellinger spin_unlock(&dev->dev_reservation_lock); 2655c66ac9dbSNicholas Bellinger core_scsi3_put_pr_reg(pr_reg); 2656c66ac9dbSNicholas Bellinger return PYX_TRANSPORT_SENT_TO_TRANSPORT; 2657c66ac9dbSNicholas Bellinger } 2658c66ac9dbSNicholas Bellinger if ((pr_res_holder->pr_res_type == PR_TYPE_WRITE_EXCLUSIVE_ALLREG) || 2659c66ac9dbSNicholas Bellinger (pr_res_holder->pr_res_type == PR_TYPE_EXCLUSIVE_ACCESS_ALLREG)) 2660c66ac9dbSNicholas Bellinger all_reg = 1; 2661c66ac9dbSNicholas Bellinger 2662c66ac9dbSNicholas Bellinger if ((all_reg == 0) && (pr_res_holder != pr_reg)) { 2663c66ac9dbSNicholas Bellinger /* 2664c66ac9dbSNicholas Bellinger * Non 'All Registrants' PR Type cases.. 2665c66ac9dbSNicholas Bellinger * Release request from a registered I_T nexus that is not a 2666c66ac9dbSNicholas Bellinger * persistent reservation holder. return GOOD status. 2667c66ac9dbSNicholas Bellinger */ 2668c66ac9dbSNicholas Bellinger spin_unlock(&dev->dev_reservation_lock); 2669c66ac9dbSNicholas Bellinger core_scsi3_put_pr_reg(pr_reg); 2670c66ac9dbSNicholas Bellinger return PYX_TRANSPORT_SENT_TO_TRANSPORT; 2671c66ac9dbSNicholas Bellinger } 2672c66ac9dbSNicholas Bellinger /* 2673c66ac9dbSNicholas Bellinger * From spc4r17 Section 5.7.11.2 Releasing: 2674c66ac9dbSNicholas Bellinger * 2675c66ac9dbSNicholas Bellinger * Only the persistent reservation holder (see 5.7.10) is allowed to 2676c66ac9dbSNicholas Bellinger * release a persistent reservation. 2677c66ac9dbSNicholas Bellinger * 2678c66ac9dbSNicholas Bellinger * An application client releases the persistent reservation by issuing 2679c66ac9dbSNicholas Bellinger * a PERSISTENT RESERVE OUT command with RELEASE service action through 2680c66ac9dbSNicholas Bellinger * an I_T nexus that is a persistent reservation holder with the 2681c66ac9dbSNicholas Bellinger * following parameters: 2682c66ac9dbSNicholas Bellinger * 2683c66ac9dbSNicholas Bellinger * a) RESERVATION KEY field set to the value of the reservation key 2684c66ac9dbSNicholas Bellinger * that is registered with the logical unit for the I_T nexus; 2685c66ac9dbSNicholas Bellinger */ 2686c66ac9dbSNicholas Bellinger if (res_key != pr_reg->pr_res_key) { 2687c66ac9dbSNicholas Bellinger printk(KERN_ERR "SPC-3 PR RELEASE: Received res_key: 0x%016Lx" 2688c66ac9dbSNicholas Bellinger " does not match existing SA REGISTER res_key:" 2689c66ac9dbSNicholas Bellinger " 0x%016Lx\n", res_key, pr_reg->pr_res_key); 2690c66ac9dbSNicholas Bellinger spin_unlock(&dev->dev_reservation_lock); 2691c66ac9dbSNicholas Bellinger core_scsi3_put_pr_reg(pr_reg); 2692c66ac9dbSNicholas Bellinger return PYX_TRANSPORT_RESERVATION_CONFLICT; 2693c66ac9dbSNicholas Bellinger } 2694c66ac9dbSNicholas Bellinger /* 2695c66ac9dbSNicholas Bellinger * From spc4r17 Section 5.7.11.2 Releasing and above: 2696c66ac9dbSNicholas Bellinger * 2697c66ac9dbSNicholas Bellinger * b) TYPE field and SCOPE field set to match the persistent 2698c66ac9dbSNicholas Bellinger * reservation being released. 2699c66ac9dbSNicholas Bellinger */ 2700c66ac9dbSNicholas Bellinger if ((pr_res_holder->pr_res_type != type) || 2701c66ac9dbSNicholas Bellinger (pr_res_holder->pr_res_scope != scope)) { 2702c66ac9dbSNicholas Bellinger struct se_node_acl *pr_res_nacl = pr_res_holder->pr_reg_nacl; 2703c66ac9dbSNicholas Bellinger printk(KERN_ERR "SPC-3 PR RELEASE: Attempted to release" 2704c66ac9dbSNicholas Bellinger " reservation from [%s]: %s with different TYPE " 2705c66ac9dbSNicholas Bellinger "and/or SCOPE while reservation already held by" 2706c66ac9dbSNicholas Bellinger " [%s]: %s, returning RESERVATION_CONFLICT\n", 2707e3d6f909SAndy Grover cmd->se_tfo->get_fabric_name(), 2708c66ac9dbSNicholas Bellinger se_sess->se_node_acl->initiatorname, 2709e3d6f909SAndy Grover pr_res_nacl->se_tpg->se_tpg_tfo->get_fabric_name(), 2710c66ac9dbSNicholas Bellinger pr_res_holder->pr_reg_nacl->initiatorname); 2711c66ac9dbSNicholas Bellinger 2712c66ac9dbSNicholas Bellinger spin_unlock(&dev->dev_reservation_lock); 2713c66ac9dbSNicholas Bellinger core_scsi3_put_pr_reg(pr_reg); 2714c66ac9dbSNicholas Bellinger return PYX_TRANSPORT_RESERVATION_CONFLICT; 2715c66ac9dbSNicholas Bellinger } 2716c66ac9dbSNicholas Bellinger /* 2717c66ac9dbSNicholas Bellinger * In response to a persistent reservation release request from the 2718c66ac9dbSNicholas Bellinger * persistent reservation holder the device server shall perform a 2719c66ac9dbSNicholas Bellinger * release by doing the following as an uninterrupted series of actions: 2720c66ac9dbSNicholas Bellinger * a) Release the persistent reservation; 2721c66ac9dbSNicholas Bellinger * b) Not remove any registration(s); 2722c66ac9dbSNicholas Bellinger * c) If the released persistent reservation is a registrants only type 2723c66ac9dbSNicholas Bellinger * or all registrants type persistent reservation, 2724c66ac9dbSNicholas Bellinger * the device server shall establish a unit attention condition for 2725c66ac9dbSNicholas Bellinger * the initiator port associated with every regis- 2726c66ac9dbSNicholas Bellinger * tered I_T nexus other than I_T nexus on which the PERSISTENT 2727c66ac9dbSNicholas Bellinger * RESERVE OUT command with RELEASE service action was received, 2728c66ac9dbSNicholas Bellinger * with the additional sense code set to RESERVATIONS RELEASED; and 2729c66ac9dbSNicholas Bellinger * d) If the persistent reservation is of any other type, the device 2730c66ac9dbSNicholas Bellinger * server shall not establish a unit attention condition. 2731c66ac9dbSNicholas Bellinger */ 2732c66ac9dbSNicholas Bellinger __core_scsi3_complete_pro_release(dev, se_sess->se_node_acl, 2733c66ac9dbSNicholas Bellinger pr_reg, 1); 2734c66ac9dbSNicholas Bellinger 2735c66ac9dbSNicholas Bellinger spin_unlock(&dev->dev_reservation_lock); 2736c66ac9dbSNicholas Bellinger 2737c66ac9dbSNicholas Bellinger if ((type != PR_TYPE_WRITE_EXCLUSIVE_REGONLY) && 2738c66ac9dbSNicholas Bellinger (type != PR_TYPE_EXCLUSIVE_ACCESS_REGONLY) && 2739c66ac9dbSNicholas Bellinger (type != PR_TYPE_WRITE_EXCLUSIVE_ALLREG) && 2740c66ac9dbSNicholas Bellinger (type != PR_TYPE_EXCLUSIVE_ACCESS_ALLREG)) { 2741c66ac9dbSNicholas Bellinger /* 2742c66ac9dbSNicholas Bellinger * If no UNIT ATTENTION conditions will be established for 2743c66ac9dbSNicholas Bellinger * PR_TYPE_WRITE_EXCLUSIVE or PR_TYPE_EXCLUSIVE_ACCESS 2744c66ac9dbSNicholas Bellinger * go ahead and check for APTPL=1 update+write below 2745c66ac9dbSNicholas Bellinger */ 2746c66ac9dbSNicholas Bellinger goto write_aptpl; 2747c66ac9dbSNicholas Bellinger } 2748c66ac9dbSNicholas Bellinger 2749c66ac9dbSNicholas Bellinger spin_lock(&pr_tmpl->registration_lock); 2750c66ac9dbSNicholas Bellinger list_for_each_entry(pr_reg_p, &pr_tmpl->registration_list, 2751c66ac9dbSNicholas Bellinger pr_reg_list) { 2752c66ac9dbSNicholas Bellinger /* 2753c66ac9dbSNicholas Bellinger * Do not establish a UNIT ATTENTION condition 2754c66ac9dbSNicholas Bellinger * for the calling I_T Nexus 2755c66ac9dbSNicholas Bellinger */ 2756c66ac9dbSNicholas Bellinger if (pr_reg_p == pr_reg) 2757c66ac9dbSNicholas Bellinger continue; 2758c66ac9dbSNicholas Bellinger 2759c66ac9dbSNicholas Bellinger core_scsi3_ua_allocate(pr_reg_p->pr_reg_nacl, 2760c66ac9dbSNicholas Bellinger pr_reg_p->pr_res_mapped_lun, 2761c66ac9dbSNicholas Bellinger 0x2A, ASCQ_2AH_RESERVATIONS_RELEASED); 2762c66ac9dbSNicholas Bellinger } 2763c66ac9dbSNicholas Bellinger spin_unlock(&pr_tmpl->registration_lock); 2764c66ac9dbSNicholas Bellinger 2765c66ac9dbSNicholas Bellinger write_aptpl: 2766c66ac9dbSNicholas Bellinger if (pr_tmpl->pr_aptpl_active) { 27675951146dSAndy Grover ret = core_scsi3_update_and_write_aptpl(cmd->se_dev, 2768c66ac9dbSNicholas Bellinger &pr_reg->pr_aptpl_buf[0], 2769c66ac9dbSNicholas Bellinger pr_tmpl->pr_aptpl_buf_len); 2770c66ac9dbSNicholas Bellinger if (!(ret)) 2771c66ac9dbSNicholas Bellinger printk("SPC-3 PR: Updated APTPL metadata for RELEASE\n"); 2772c66ac9dbSNicholas Bellinger } 2773c66ac9dbSNicholas Bellinger 2774c66ac9dbSNicholas Bellinger core_scsi3_put_pr_reg(pr_reg); 2775c66ac9dbSNicholas Bellinger return 0; 2776c66ac9dbSNicholas Bellinger } 2777c66ac9dbSNicholas Bellinger 2778c66ac9dbSNicholas Bellinger static int core_scsi3_emulate_pro_clear( 2779c66ac9dbSNicholas Bellinger struct se_cmd *cmd, 2780c66ac9dbSNicholas Bellinger u64 res_key) 2781c66ac9dbSNicholas Bellinger { 2782c66ac9dbSNicholas Bellinger struct se_device *dev = cmd->se_dev; 2783c66ac9dbSNicholas Bellinger struct se_node_acl *pr_reg_nacl; 2784e3d6f909SAndy Grover struct se_session *se_sess = cmd->se_sess; 2785e3d6f909SAndy Grover struct t10_reservation *pr_tmpl = &dev->se_sub_dev->t10_pr; 2786c66ac9dbSNicholas Bellinger struct t10_pr_registration *pr_reg, *pr_reg_tmp, *pr_reg_n, *pr_res_holder; 2787c66ac9dbSNicholas Bellinger u32 pr_res_mapped_lun = 0; 2788c66ac9dbSNicholas Bellinger int calling_it_nexus = 0; 2789c66ac9dbSNicholas Bellinger /* 2790c66ac9dbSNicholas Bellinger * Locate the existing *pr_reg via struct se_node_acl pointers 2791c66ac9dbSNicholas Bellinger */ 27925951146dSAndy Grover pr_reg_n = core_scsi3_locate_pr_reg(cmd->se_dev, 2793c66ac9dbSNicholas Bellinger se_sess->se_node_acl, se_sess); 2794c66ac9dbSNicholas Bellinger if (!(pr_reg_n)) { 2795c66ac9dbSNicholas Bellinger printk(KERN_ERR "SPC-3 PR: Unable to locate" 2796c66ac9dbSNicholas Bellinger " PR_REGISTERED *pr_reg for CLEAR\n"); 2797c66ac9dbSNicholas Bellinger return PYX_TRANSPORT_LU_COMM_FAILURE; 2798c66ac9dbSNicholas Bellinger } 2799c66ac9dbSNicholas Bellinger /* 2800c66ac9dbSNicholas Bellinger * From spc4r17 section 5.7.11.6, Clearing: 2801c66ac9dbSNicholas Bellinger * 2802c66ac9dbSNicholas Bellinger * Any application client may release the persistent reservation and 2803c66ac9dbSNicholas Bellinger * remove all registrations from a device server by issuing a 2804c66ac9dbSNicholas Bellinger * PERSISTENT RESERVE OUT command with CLEAR service action through a 2805c66ac9dbSNicholas Bellinger * registered I_T nexus with the following parameter: 2806c66ac9dbSNicholas Bellinger * 2807c66ac9dbSNicholas Bellinger * a) RESERVATION KEY field set to the value of the reservation key 2808c66ac9dbSNicholas Bellinger * that is registered with the logical unit for the I_T nexus. 2809c66ac9dbSNicholas Bellinger */ 2810c66ac9dbSNicholas Bellinger if (res_key != pr_reg_n->pr_res_key) { 2811c66ac9dbSNicholas Bellinger printk(KERN_ERR "SPC-3 PR REGISTER: Received" 2812c66ac9dbSNicholas Bellinger " res_key: 0x%016Lx does not match" 2813c66ac9dbSNicholas Bellinger " existing SA REGISTER res_key:" 2814c66ac9dbSNicholas Bellinger " 0x%016Lx\n", res_key, pr_reg_n->pr_res_key); 2815c66ac9dbSNicholas Bellinger core_scsi3_put_pr_reg(pr_reg_n); 2816c66ac9dbSNicholas Bellinger return PYX_TRANSPORT_RESERVATION_CONFLICT; 2817c66ac9dbSNicholas Bellinger } 2818c66ac9dbSNicholas Bellinger /* 2819c66ac9dbSNicholas Bellinger * a) Release the persistent reservation, if any; 2820c66ac9dbSNicholas Bellinger */ 2821c66ac9dbSNicholas Bellinger spin_lock(&dev->dev_reservation_lock); 2822c66ac9dbSNicholas Bellinger pr_res_holder = dev->dev_pr_res_holder; 2823c66ac9dbSNicholas Bellinger if (pr_res_holder) { 2824c66ac9dbSNicholas Bellinger struct se_node_acl *pr_res_nacl = pr_res_holder->pr_reg_nacl; 2825c66ac9dbSNicholas Bellinger __core_scsi3_complete_pro_release(dev, pr_res_nacl, 2826c66ac9dbSNicholas Bellinger pr_res_holder, 0); 2827c66ac9dbSNicholas Bellinger } 2828c66ac9dbSNicholas Bellinger spin_unlock(&dev->dev_reservation_lock); 2829c66ac9dbSNicholas Bellinger /* 2830c66ac9dbSNicholas Bellinger * b) Remove all registration(s) (see spc4r17 5.7.7); 2831c66ac9dbSNicholas Bellinger */ 2832c66ac9dbSNicholas Bellinger spin_lock(&pr_tmpl->registration_lock); 2833c66ac9dbSNicholas Bellinger list_for_each_entry_safe(pr_reg, pr_reg_tmp, 2834c66ac9dbSNicholas Bellinger &pr_tmpl->registration_list, pr_reg_list) { 2835c66ac9dbSNicholas Bellinger 2836c66ac9dbSNicholas Bellinger calling_it_nexus = (pr_reg_n == pr_reg) ? 1 : 0; 2837c66ac9dbSNicholas Bellinger pr_reg_nacl = pr_reg->pr_reg_nacl; 2838c66ac9dbSNicholas Bellinger pr_res_mapped_lun = pr_reg->pr_res_mapped_lun; 2839c66ac9dbSNicholas Bellinger __core_scsi3_free_registration(dev, pr_reg, NULL, 2840c66ac9dbSNicholas Bellinger calling_it_nexus); 2841c66ac9dbSNicholas Bellinger /* 2842c66ac9dbSNicholas Bellinger * e) Establish a unit attention condition for the initiator 2843c66ac9dbSNicholas Bellinger * port associated with every registered I_T nexus other 2844c66ac9dbSNicholas Bellinger * than the I_T nexus on which the PERSISTENT RESERVE OUT 2845c66ac9dbSNicholas Bellinger * command with CLEAR service action was received, with the 2846c66ac9dbSNicholas Bellinger * additional sense code set to RESERVATIONS PREEMPTED. 2847c66ac9dbSNicholas Bellinger */ 2848c66ac9dbSNicholas Bellinger if (!(calling_it_nexus)) 2849c66ac9dbSNicholas Bellinger core_scsi3_ua_allocate(pr_reg_nacl, pr_res_mapped_lun, 2850c66ac9dbSNicholas Bellinger 0x2A, ASCQ_2AH_RESERVATIONS_PREEMPTED); 2851c66ac9dbSNicholas Bellinger } 2852c66ac9dbSNicholas Bellinger spin_unlock(&pr_tmpl->registration_lock); 2853c66ac9dbSNicholas Bellinger 2854c66ac9dbSNicholas Bellinger printk(KERN_INFO "SPC-3 PR [%s] Service Action: CLEAR complete\n", 2855e3d6f909SAndy Grover cmd->se_tfo->get_fabric_name()); 2856c66ac9dbSNicholas Bellinger 2857c66ac9dbSNicholas Bellinger if (pr_tmpl->pr_aptpl_active) { 28585951146dSAndy Grover core_scsi3_update_and_write_aptpl(cmd->se_dev, NULL, 0); 2859c66ac9dbSNicholas Bellinger printk(KERN_INFO "SPC-3 PR: Updated APTPL metadata" 2860c66ac9dbSNicholas Bellinger " for CLEAR\n"); 2861c66ac9dbSNicholas Bellinger } 2862c66ac9dbSNicholas Bellinger 2863c66ac9dbSNicholas Bellinger core_scsi3_pr_generation(dev); 2864c66ac9dbSNicholas Bellinger return 0; 2865c66ac9dbSNicholas Bellinger } 2866c66ac9dbSNicholas Bellinger 2867c66ac9dbSNicholas Bellinger /* 2868c66ac9dbSNicholas Bellinger * Called with struct se_device->dev_reservation_lock held. 2869c66ac9dbSNicholas Bellinger */ 2870c66ac9dbSNicholas Bellinger static void __core_scsi3_complete_pro_preempt( 2871c66ac9dbSNicholas Bellinger struct se_device *dev, 2872c66ac9dbSNicholas Bellinger struct t10_pr_registration *pr_reg, 2873c66ac9dbSNicholas Bellinger struct list_head *preempt_and_abort_list, 2874c66ac9dbSNicholas Bellinger int type, 2875c66ac9dbSNicholas Bellinger int scope, 2876c66ac9dbSNicholas Bellinger int abort) 2877c66ac9dbSNicholas Bellinger { 2878c66ac9dbSNicholas Bellinger struct se_node_acl *nacl = pr_reg->pr_reg_nacl; 2879c66ac9dbSNicholas Bellinger struct target_core_fabric_ops *tfo = nacl->se_tpg->se_tpg_tfo; 2880c66ac9dbSNicholas Bellinger char i_buf[PR_REG_ISID_ID_LEN]; 2881c66ac9dbSNicholas Bellinger int prf_isid; 2882c66ac9dbSNicholas Bellinger 2883c66ac9dbSNicholas Bellinger memset(i_buf, 0, PR_REG_ISID_ID_LEN); 2884c66ac9dbSNicholas Bellinger prf_isid = core_pr_dump_initiator_port(pr_reg, &i_buf[0], 2885c66ac9dbSNicholas Bellinger PR_REG_ISID_ID_LEN); 2886c66ac9dbSNicholas Bellinger /* 2887c66ac9dbSNicholas Bellinger * Do an implict RELEASE of the existing reservation. 2888c66ac9dbSNicholas Bellinger */ 2889c66ac9dbSNicholas Bellinger if (dev->dev_pr_res_holder) 2890c66ac9dbSNicholas Bellinger __core_scsi3_complete_pro_release(dev, nacl, 2891c66ac9dbSNicholas Bellinger dev->dev_pr_res_holder, 0); 2892c66ac9dbSNicholas Bellinger 2893c66ac9dbSNicholas Bellinger dev->dev_pr_res_holder = pr_reg; 2894c66ac9dbSNicholas Bellinger pr_reg->pr_res_holder = 1; 2895c66ac9dbSNicholas Bellinger pr_reg->pr_res_type = type; 2896c66ac9dbSNicholas Bellinger pr_reg->pr_res_scope = scope; 2897c66ac9dbSNicholas Bellinger 2898c66ac9dbSNicholas Bellinger printk(KERN_INFO "SPC-3 PR [%s] Service Action: PREEMPT%s created new" 2899c66ac9dbSNicholas Bellinger " reservation holder TYPE: %s ALL_TG_PT: %d\n", 2900c66ac9dbSNicholas Bellinger tfo->get_fabric_name(), (abort) ? "_AND_ABORT" : "", 2901c66ac9dbSNicholas Bellinger core_scsi3_pr_dump_type(type), 2902c66ac9dbSNicholas Bellinger (pr_reg->pr_reg_all_tg_pt) ? 1 : 0); 2903c66ac9dbSNicholas Bellinger printk(KERN_INFO "SPC-3 PR [%s] PREEMPT%s from Node: %s%s\n", 2904c66ac9dbSNicholas Bellinger tfo->get_fabric_name(), (abort) ? "_AND_ABORT" : "", 2905c66ac9dbSNicholas Bellinger nacl->initiatorname, (prf_isid) ? &i_buf[0] : ""); 2906c66ac9dbSNicholas Bellinger /* 2907c66ac9dbSNicholas Bellinger * For PREEMPT_AND_ABORT, add the preempting reservation's 2908c66ac9dbSNicholas Bellinger * struct t10_pr_registration to the list that will be compared 2909c66ac9dbSNicholas Bellinger * against received CDBs.. 2910c66ac9dbSNicholas Bellinger */ 2911c66ac9dbSNicholas Bellinger if (preempt_and_abort_list) 2912c66ac9dbSNicholas Bellinger list_add_tail(&pr_reg->pr_reg_abort_list, 2913c66ac9dbSNicholas Bellinger preempt_and_abort_list); 2914c66ac9dbSNicholas Bellinger } 2915c66ac9dbSNicholas Bellinger 2916c66ac9dbSNicholas Bellinger static void core_scsi3_release_preempt_and_abort( 2917c66ac9dbSNicholas Bellinger struct list_head *preempt_and_abort_list, 2918c66ac9dbSNicholas Bellinger struct t10_pr_registration *pr_reg_holder) 2919c66ac9dbSNicholas Bellinger { 2920c66ac9dbSNicholas Bellinger struct t10_pr_registration *pr_reg, *pr_reg_tmp; 2921c66ac9dbSNicholas Bellinger 2922c66ac9dbSNicholas Bellinger list_for_each_entry_safe(pr_reg, pr_reg_tmp, preempt_and_abort_list, 2923c66ac9dbSNicholas Bellinger pr_reg_abort_list) { 2924c66ac9dbSNicholas Bellinger 2925c66ac9dbSNicholas Bellinger list_del(&pr_reg->pr_reg_abort_list); 2926c66ac9dbSNicholas Bellinger if (pr_reg_holder == pr_reg) 2927c66ac9dbSNicholas Bellinger continue; 2928c66ac9dbSNicholas Bellinger if (pr_reg->pr_res_holder) { 2929c66ac9dbSNicholas Bellinger printk(KERN_WARNING "pr_reg->pr_res_holder still set\n"); 2930c66ac9dbSNicholas Bellinger continue; 2931c66ac9dbSNicholas Bellinger } 2932c66ac9dbSNicholas Bellinger 2933c66ac9dbSNicholas Bellinger pr_reg->pr_reg_deve = NULL; 2934c66ac9dbSNicholas Bellinger pr_reg->pr_reg_nacl = NULL; 2935c66ac9dbSNicholas Bellinger kfree(pr_reg->pr_aptpl_buf); 2936c66ac9dbSNicholas Bellinger kmem_cache_free(t10_pr_reg_cache, pr_reg); 2937c66ac9dbSNicholas Bellinger } 2938c66ac9dbSNicholas Bellinger } 2939c66ac9dbSNicholas Bellinger 2940c66ac9dbSNicholas Bellinger int core_scsi3_check_cdb_abort_and_preempt( 2941c66ac9dbSNicholas Bellinger struct list_head *preempt_and_abort_list, 2942c66ac9dbSNicholas Bellinger struct se_cmd *cmd) 2943c66ac9dbSNicholas Bellinger { 2944c66ac9dbSNicholas Bellinger struct t10_pr_registration *pr_reg, *pr_reg_tmp; 2945c66ac9dbSNicholas Bellinger 2946c66ac9dbSNicholas Bellinger list_for_each_entry_safe(pr_reg, pr_reg_tmp, preempt_and_abort_list, 2947c66ac9dbSNicholas Bellinger pr_reg_abort_list) { 2948c66ac9dbSNicholas Bellinger if (pr_reg->pr_res_key == cmd->pr_res_key) 2949c66ac9dbSNicholas Bellinger return 0; 2950c66ac9dbSNicholas Bellinger } 2951c66ac9dbSNicholas Bellinger 2952c66ac9dbSNicholas Bellinger return 1; 2953c66ac9dbSNicholas Bellinger } 2954c66ac9dbSNicholas Bellinger 2955c66ac9dbSNicholas Bellinger static int core_scsi3_pro_preempt( 2956c66ac9dbSNicholas Bellinger struct se_cmd *cmd, 2957c66ac9dbSNicholas Bellinger int type, 2958c66ac9dbSNicholas Bellinger int scope, 2959c66ac9dbSNicholas Bellinger u64 res_key, 2960c66ac9dbSNicholas Bellinger u64 sa_res_key, 2961c66ac9dbSNicholas Bellinger int abort) 2962c66ac9dbSNicholas Bellinger { 29635951146dSAndy Grover struct se_device *dev = cmd->se_dev; 2964c66ac9dbSNicholas Bellinger struct se_dev_entry *se_deve; 2965c66ac9dbSNicholas Bellinger struct se_node_acl *pr_reg_nacl; 2966e3d6f909SAndy Grover struct se_session *se_sess = cmd->se_sess; 2967c66ac9dbSNicholas Bellinger struct list_head preempt_and_abort_list; 2968c66ac9dbSNicholas Bellinger struct t10_pr_registration *pr_reg, *pr_reg_tmp, *pr_reg_n, *pr_res_holder; 2969e3d6f909SAndy Grover struct t10_reservation *pr_tmpl = &dev->se_sub_dev->t10_pr; 2970c66ac9dbSNicholas Bellinger u32 pr_res_mapped_lun = 0; 2971c66ac9dbSNicholas Bellinger int all_reg = 0, calling_it_nexus = 0, released_regs = 0; 2972c66ac9dbSNicholas Bellinger int prh_type = 0, prh_scope = 0, ret; 2973c66ac9dbSNicholas Bellinger 2974c66ac9dbSNicholas Bellinger if (!(se_sess)) 2975c66ac9dbSNicholas Bellinger return PYX_TRANSPORT_LU_COMM_FAILURE; 2976c66ac9dbSNicholas Bellinger 2977c66ac9dbSNicholas Bellinger se_deve = &se_sess->se_node_acl->device_list[cmd->orig_fe_lun]; 29785951146dSAndy Grover pr_reg_n = core_scsi3_locate_pr_reg(cmd->se_dev, se_sess->se_node_acl, 2979c66ac9dbSNicholas Bellinger se_sess); 2980c66ac9dbSNicholas Bellinger if (!(pr_reg_n)) { 2981c66ac9dbSNicholas Bellinger printk(KERN_ERR "SPC-3 PR: Unable to locate" 2982c66ac9dbSNicholas Bellinger " PR_REGISTERED *pr_reg for PREEMPT%s\n", 2983c66ac9dbSNicholas Bellinger (abort) ? "_AND_ABORT" : ""); 2984c66ac9dbSNicholas Bellinger return PYX_TRANSPORT_RESERVATION_CONFLICT; 2985c66ac9dbSNicholas Bellinger } 2986c66ac9dbSNicholas Bellinger if (pr_reg_n->pr_res_key != res_key) { 2987c66ac9dbSNicholas Bellinger core_scsi3_put_pr_reg(pr_reg_n); 2988c66ac9dbSNicholas Bellinger return PYX_TRANSPORT_RESERVATION_CONFLICT; 2989c66ac9dbSNicholas Bellinger } 2990c66ac9dbSNicholas Bellinger if (scope != PR_SCOPE_LU_SCOPE) { 2991c66ac9dbSNicholas Bellinger printk(KERN_ERR "SPC-3 PR: Illegal SCOPE: 0x%02x\n", scope); 2992c66ac9dbSNicholas Bellinger core_scsi3_put_pr_reg(pr_reg_n); 2993c66ac9dbSNicholas Bellinger return PYX_TRANSPORT_INVALID_PARAMETER_LIST; 2994c66ac9dbSNicholas Bellinger } 2995c66ac9dbSNicholas Bellinger INIT_LIST_HEAD(&preempt_and_abort_list); 2996c66ac9dbSNicholas Bellinger 2997c66ac9dbSNicholas Bellinger spin_lock(&dev->dev_reservation_lock); 2998c66ac9dbSNicholas Bellinger pr_res_holder = dev->dev_pr_res_holder; 2999c66ac9dbSNicholas Bellinger if (pr_res_holder && 3000c66ac9dbSNicholas Bellinger ((pr_res_holder->pr_res_type == PR_TYPE_WRITE_EXCLUSIVE_ALLREG) || 3001c66ac9dbSNicholas Bellinger (pr_res_holder->pr_res_type == PR_TYPE_EXCLUSIVE_ACCESS_ALLREG))) 3002c66ac9dbSNicholas Bellinger all_reg = 1; 3003c66ac9dbSNicholas Bellinger 3004c66ac9dbSNicholas Bellinger if (!(all_reg) && !(sa_res_key)) { 3005c66ac9dbSNicholas Bellinger spin_unlock(&dev->dev_reservation_lock); 3006c66ac9dbSNicholas Bellinger core_scsi3_put_pr_reg(pr_reg_n); 3007c66ac9dbSNicholas Bellinger return PYX_TRANSPORT_INVALID_PARAMETER_LIST; 3008c66ac9dbSNicholas Bellinger } 3009c66ac9dbSNicholas Bellinger /* 3010c66ac9dbSNicholas Bellinger * From spc4r17, section 5.7.11.4.4 Removing Registrations: 3011c66ac9dbSNicholas Bellinger * 3012c66ac9dbSNicholas Bellinger * If the SERVICE ACTION RESERVATION KEY field does not identify a 3013c66ac9dbSNicholas Bellinger * persistent reservation holder or there is no persistent reservation 3014c66ac9dbSNicholas Bellinger * holder (i.e., there is no persistent reservation), then the device 3015c66ac9dbSNicholas Bellinger * server shall perform a preempt by doing the following in an 3016c66ac9dbSNicholas Bellinger * uninterrupted series of actions. (See below..) 3017c66ac9dbSNicholas Bellinger */ 3018c66ac9dbSNicholas Bellinger if (!(pr_res_holder) || (pr_res_holder->pr_res_key != sa_res_key)) { 3019c66ac9dbSNicholas Bellinger /* 3020c66ac9dbSNicholas Bellinger * No existing or SA Reservation Key matching reservations.. 3021c66ac9dbSNicholas Bellinger * 3022c66ac9dbSNicholas Bellinger * PROUT SA PREEMPT with All Registrant type reservations are 3023c66ac9dbSNicholas Bellinger * allowed to be processed without a matching SA Reservation Key 3024c66ac9dbSNicholas Bellinger */ 3025c66ac9dbSNicholas Bellinger spin_lock(&pr_tmpl->registration_lock); 3026c66ac9dbSNicholas Bellinger list_for_each_entry_safe(pr_reg, pr_reg_tmp, 3027c66ac9dbSNicholas Bellinger &pr_tmpl->registration_list, pr_reg_list) { 3028c66ac9dbSNicholas Bellinger /* 3029c66ac9dbSNicholas Bellinger * Removing of registrations in non all registrants 3030c66ac9dbSNicholas Bellinger * type reservations without a matching SA reservation 3031c66ac9dbSNicholas Bellinger * key. 3032c66ac9dbSNicholas Bellinger * 3033c66ac9dbSNicholas Bellinger * a) Remove the registrations for all I_T nexuses 3034c66ac9dbSNicholas Bellinger * specified by the SERVICE ACTION RESERVATION KEY 3035c66ac9dbSNicholas Bellinger * field; 3036c66ac9dbSNicholas Bellinger * b) Ignore the contents of the SCOPE and TYPE fields; 3037c66ac9dbSNicholas Bellinger * c) Process tasks as defined in 5.7.1; and 3038c66ac9dbSNicholas Bellinger * d) Establish a unit attention condition for the 3039c66ac9dbSNicholas Bellinger * initiator port associated with every I_T nexus 3040c66ac9dbSNicholas Bellinger * that lost its registration other than the I_T 3041c66ac9dbSNicholas Bellinger * nexus on which the PERSISTENT RESERVE OUT command 3042c66ac9dbSNicholas Bellinger * was received, with the additional sense code set 3043c66ac9dbSNicholas Bellinger * to REGISTRATIONS PREEMPTED. 3044c66ac9dbSNicholas Bellinger */ 3045c66ac9dbSNicholas Bellinger if (!(all_reg)) { 3046c66ac9dbSNicholas Bellinger if (pr_reg->pr_res_key != sa_res_key) 3047c66ac9dbSNicholas Bellinger continue; 3048c66ac9dbSNicholas Bellinger 3049c66ac9dbSNicholas Bellinger calling_it_nexus = (pr_reg_n == pr_reg) ? 1 : 0; 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, 3053c66ac9dbSNicholas Bellinger (abort) ? &preempt_and_abort_list : 3054c66ac9dbSNicholas Bellinger NULL, calling_it_nexus); 3055c66ac9dbSNicholas Bellinger released_regs++; 3056c66ac9dbSNicholas Bellinger } else { 3057c66ac9dbSNicholas Bellinger /* 3058c66ac9dbSNicholas Bellinger * Case for any existing all registrants type 3059c66ac9dbSNicholas Bellinger * reservation, follow logic in spc4r17 section 3060c66ac9dbSNicholas Bellinger * 5.7.11.4 Preempting, Table 52 and Figure 7. 3061c66ac9dbSNicholas Bellinger * 3062c66ac9dbSNicholas Bellinger * For a ZERO SA Reservation key, release 3063c66ac9dbSNicholas Bellinger * all other registrations and do an implict 3064c66ac9dbSNicholas Bellinger * release of active persistent reservation. 3065c66ac9dbSNicholas Bellinger * 3066c66ac9dbSNicholas Bellinger * For a non-ZERO SA Reservation key, only 3067c66ac9dbSNicholas Bellinger * release the matching reservation key from 3068c66ac9dbSNicholas Bellinger * registrations. 3069c66ac9dbSNicholas Bellinger */ 3070c66ac9dbSNicholas Bellinger if ((sa_res_key) && 3071c66ac9dbSNicholas Bellinger (pr_reg->pr_res_key != sa_res_key)) 3072c66ac9dbSNicholas Bellinger continue; 3073c66ac9dbSNicholas Bellinger 3074c66ac9dbSNicholas Bellinger calling_it_nexus = (pr_reg_n == pr_reg) ? 1 : 0; 3075c66ac9dbSNicholas Bellinger if (calling_it_nexus) 3076c66ac9dbSNicholas Bellinger continue; 3077c66ac9dbSNicholas Bellinger 3078c66ac9dbSNicholas Bellinger pr_reg_nacl = pr_reg->pr_reg_nacl; 3079c66ac9dbSNicholas Bellinger pr_res_mapped_lun = pr_reg->pr_res_mapped_lun; 3080c66ac9dbSNicholas Bellinger __core_scsi3_free_registration(dev, pr_reg, 3081c66ac9dbSNicholas Bellinger (abort) ? &preempt_and_abort_list : 3082c66ac9dbSNicholas Bellinger NULL, 0); 3083c66ac9dbSNicholas Bellinger released_regs++; 3084c66ac9dbSNicholas Bellinger } 3085c66ac9dbSNicholas Bellinger if (!(calling_it_nexus)) 3086c66ac9dbSNicholas Bellinger core_scsi3_ua_allocate(pr_reg_nacl, 3087c66ac9dbSNicholas Bellinger pr_res_mapped_lun, 0x2A, 3088c66ac9dbSNicholas Bellinger ASCQ_2AH_RESERVATIONS_PREEMPTED); 3089c66ac9dbSNicholas Bellinger } 3090c66ac9dbSNicholas Bellinger spin_unlock(&pr_tmpl->registration_lock); 3091c66ac9dbSNicholas Bellinger /* 3092c66ac9dbSNicholas Bellinger * If a PERSISTENT RESERVE OUT with a PREEMPT service action or 3093c66ac9dbSNicholas Bellinger * a PREEMPT AND ABORT service action sets the SERVICE ACTION 3094c66ac9dbSNicholas Bellinger * RESERVATION KEY field to a value that does not match any 3095c66ac9dbSNicholas Bellinger * registered reservation key, then the device server shall 3096c66ac9dbSNicholas Bellinger * complete the command with RESERVATION CONFLICT status. 3097c66ac9dbSNicholas Bellinger */ 3098c66ac9dbSNicholas Bellinger if (!(released_regs)) { 3099c66ac9dbSNicholas Bellinger spin_unlock(&dev->dev_reservation_lock); 3100c66ac9dbSNicholas Bellinger core_scsi3_put_pr_reg(pr_reg_n); 3101c66ac9dbSNicholas Bellinger return PYX_TRANSPORT_RESERVATION_CONFLICT; 3102c66ac9dbSNicholas Bellinger } 3103c66ac9dbSNicholas Bellinger /* 3104c66ac9dbSNicholas Bellinger * For an existing all registrants type reservation 3105c66ac9dbSNicholas Bellinger * with a zero SA rservation key, preempt the existing 3106c66ac9dbSNicholas Bellinger * reservation with the new PR type and scope. 3107c66ac9dbSNicholas Bellinger */ 3108c66ac9dbSNicholas Bellinger if (pr_res_holder && all_reg && !(sa_res_key)) { 3109c66ac9dbSNicholas Bellinger __core_scsi3_complete_pro_preempt(dev, pr_reg_n, 3110c66ac9dbSNicholas Bellinger (abort) ? &preempt_and_abort_list : NULL, 3111c66ac9dbSNicholas Bellinger type, scope, abort); 3112c66ac9dbSNicholas Bellinger 3113c66ac9dbSNicholas Bellinger if (abort) 3114c66ac9dbSNicholas Bellinger core_scsi3_release_preempt_and_abort( 3115c66ac9dbSNicholas Bellinger &preempt_and_abort_list, pr_reg_n); 3116c66ac9dbSNicholas Bellinger } 3117c66ac9dbSNicholas Bellinger spin_unlock(&dev->dev_reservation_lock); 3118c66ac9dbSNicholas Bellinger 3119c66ac9dbSNicholas Bellinger if (pr_tmpl->pr_aptpl_active) { 31205951146dSAndy Grover ret = core_scsi3_update_and_write_aptpl(cmd->se_dev, 3121c66ac9dbSNicholas Bellinger &pr_reg_n->pr_aptpl_buf[0], 3122c66ac9dbSNicholas Bellinger pr_tmpl->pr_aptpl_buf_len); 3123c66ac9dbSNicholas Bellinger if (!(ret)) 3124c66ac9dbSNicholas Bellinger printk(KERN_INFO "SPC-3 PR: Updated APTPL" 3125c66ac9dbSNicholas Bellinger " metadata for PREEMPT%s\n", (abort) ? 3126c66ac9dbSNicholas Bellinger "_AND_ABORT" : ""); 3127c66ac9dbSNicholas Bellinger } 3128c66ac9dbSNicholas Bellinger 3129c66ac9dbSNicholas Bellinger core_scsi3_put_pr_reg(pr_reg_n); 31305951146dSAndy Grover core_scsi3_pr_generation(cmd->se_dev); 3131c66ac9dbSNicholas Bellinger return 0; 3132c66ac9dbSNicholas Bellinger } 3133c66ac9dbSNicholas Bellinger /* 3134c66ac9dbSNicholas Bellinger * The PREEMPTing SA reservation key matches that of the 3135c66ac9dbSNicholas Bellinger * existing persistent reservation, first, we check if 3136c66ac9dbSNicholas Bellinger * we are preempting our own reservation. 3137c66ac9dbSNicholas Bellinger * From spc4r17, section 5.7.11.4.3 Preempting 3138c66ac9dbSNicholas Bellinger * persistent reservations and registration handling 3139c66ac9dbSNicholas Bellinger * 3140c66ac9dbSNicholas Bellinger * If an all registrants persistent reservation is not 3141c66ac9dbSNicholas Bellinger * present, it is not an error for the persistent 3142c66ac9dbSNicholas Bellinger * reservation holder to preempt itself (i.e., a 3143c66ac9dbSNicholas Bellinger * PERSISTENT RESERVE OUT with a PREEMPT service action 3144c66ac9dbSNicholas Bellinger * or a PREEMPT AND ABORT service action with the 3145c66ac9dbSNicholas Bellinger * SERVICE ACTION RESERVATION KEY value equal to the 3146c66ac9dbSNicholas Bellinger * persistent reservation holder's reservation key that 3147c66ac9dbSNicholas Bellinger * is received from the persistent reservation holder). 3148c66ac9dbSNicholas Bellinger * In that case, the device server shall establish the 3149c66ac9dbSNicholas Bellinger * new persistent reservation and maintain the 3150c66ac9dbSNicholas Bellinger * registration. 3151c66ac9dbSNicholas Bellinger */ 3152c66ac9dbSNicholas Bellinger prh_type = pr_res_holder->pr_res_type; 3153c66ac9dbSNicholas Bellinger prh_scope = pr_res_holder->pr_res_scope; 3154c66ac9dbSNicholas Bellinger /* 3155c66ac9dbSNicholas Bellinger * If the SERVICE ACTION RESERVATION KEY field identifies a 3156c66ac9dbSNicholas Bellinger * persistent reservation holder (see 5.7.10), the device 3157c66ac9dbSNicholas Bellinger * server shall perform a preempt by doing the following as 3158c66ac9dbSNicholas Bellinger * an uninterrupted series of actions: 3159c66ac9dbSNicholas Bellinger * 3160c66ac9dbSNicholas Bellinger * a) Release the persistent reservation for the holder 3161c66ac9dbSNicholas Bellinger * identified by the SERVICE ACTION RESERVATION KEY field; 3162c66ac9dbSNicholas Bellinger */ 3163c66ac9dbSNicholas Bellinger if (pr_reg_n != pr_res_holder) 3164c66ac9dbSNicholas Bellinger __core_scsi3_complete_pro_release(dev, 3165c66ac9dbSNicholas Bellinger pr_res_holder->pr_reg_nacl, 3166c66ac9dbSNicholas Bellinger dev->dev_pr_res_holder, 0); 3167c66ac9dbSNicholas Bellinger /* 3168c66ac9dbSNicholas Bellinger * b) Remove the registrations for all I_T nexuses identified 3169c66ac9dbSNicholas Bellinger * by the SERVICE ACTION RESERVATION KEY field, except the 3170c66ac9dbSNicholas Bellinger * I_T nexus that is being used for the PERSISTENT RESERVE 3171c66ac9dbSNicholas Bellinger * OUT command. If an all registrants persistent reservation 3172c66ac9dbSNicholas Bellinger * is present and the SERVICE ACTION RESERVATION KEY field 3173c66ac9dbSNicholas Bellinger * is set to zero, then all registrations shall be removed 3174c66ac9dbSNicholas Bellinger * except for that of the I_T nexus that is being used for 3175c66ac9dbSNicholas Bellinger * the PERSISTENT RESERVE OUT command; 3176c66ac9dbSNicholas Bellinger */ 3177c66ac9dbSNicholas Bellinger spin_lock(&pr_tmpl->registration_lock); 3178c66ac9dbSNicholas Bellinger list_for_each_entry_safe(pr_reg, pr_reg_tmp, 3179c66ac9dbSNicholas Bellinger &pr_tmpl->registration_list, pr_reg_list) { 3180c66ac9dbSNicholas Bellinger 3181c66ac9dbSNicholas Bellinger calling_it_nexus = (pr_reg_n == pr_reg) ? 1 : 0; 3182c66ac9dbSNicholas Bellinger if (calling_it_nexus) 3183c66ac9dbSNicholas Bellinger continue; 3184c66ac9dbSNicholas Bellinger 3185c66ac9dbSNicholas Bellinger if (pr_reg->pr_res_key != sa_res_key) 3186c66ac9dbSNicholas Bellinger continue; 3187c66ac9dbSNicholas Bellinger 3188c66ac9dbSNicholas Bellinger pr_reg_nacl = pr_reg->pr_reg_nacl; 3189c66ac9dbSNicholas Bellinger pr_res_mapped_lun = pr_reg->pr_res_mapped_lun; 3190c66ac9dbSNicholas Bellinger __core_scsi3_free_registration(dev, pr_reg, 3191c66ac9dbSNicholas Bellinger (abort) ? &preempt_and_abort_list : NULL, 3192c66ac9dbSNicholas Bellinger calling_it_nexus); 3193c66ac9dbSNicholas Bellinger /* 3194c66ac9dbSNicholas Bellinger * e) Establish a unit attention condition for the initiator 3195c66ac9dbSNicholas Bellinger * port associated with every I_T nexus that lost its 3196c66ac9dbSNicholas Bellinger * persistent reservation and/or registration, with the 3197c66ac9dbSNicholas Bellinger * additional sense code set to REGISTRATIONS PREEMPTED; 3198c66ac9dbSNicholas Bellinger */ 3199c66ac9dbSNicholas Bellinger core_scsi3_ua_allocate(pr_reg_nacl, pr_res_mapped_lun, 0x2A, 3200c66ac9dbSNicholas Bellinger ASCQ_2AH_RESERVATIONS_PREEMPTED); 3201c66ac9dbSNicholas Bellinger } 3202c66ac9dbSNicholas Bellinger spin_unlock(&pr_tmpl->registration_lock); 3203c66ac9dbSNicholas Bellinger /* 3204c66ac9dbSNicholas Bellinger * c) Establish a persistent reservation for the preempting 3205c66ac9dbSNicholas Bellinger * I_T nexus using the contents of the SCOPE and TYPE fields; 3206c66ac9dbSNicholas Bellinger */ 3207c66ac9dbSNicholas Bellinger __core_scsi3_complete_pro_preempt(dev, pr_reg_n, 3208c66ac9dbSNicholas Bellinger (abort) ? &preempt_and_abort_list : NULL, 3209c66ac9dbSNicholas Bellinger type, scope, abort); 3210c66ac9dbSNicholas Bellinger /* 3211c66ac9dbSNicholas Bellinger * d) Process tasks as defined in 5.7.1; 3212c66ac9dbSNicholas Bellinger * e) See above.. 3213c66ac9dbSNicholas Bellinger * f) If the type or scope has changed, then for every I_T nexus 3214c66ac9dbSNicholas Bellinger * whose reservation key was not removed, except for the I_T 3215c66ac9dbSNicholas Bellinger * nexus on which the PERSISTENT RESERVE OUT command was 3216c66ac9dbSNicholas Bellinger * received, the device server shall establish a unit 3217c66ac9dbSNicholas Bellinger * attention condition for the initiator port associated with 3218c66ac9dbSNicholas Bellinger * that I_T nexus, with the additional sense code set to 3219c66ac9dbSNicholas Bellinger * RESERVATIONS RELEASED. If the type or scope have not 3220c66ac9dbSNicholas Bellinger * changed, then no unit attention condition(s) shall be 3221c66ac9dbSNicholas Bellinger * established for this reason. 3222c66ac9dbSNicholas Bellinger */ 3223c66ac9dbSNicholas Bellinger if ((prh_type != type) || (prh_scope != scope)) { 3224c66ac9dbSNicholas Bellinger spin_lock(&pr_tmpl->registration_lock); 3225c66ac9dbSNicholas Bellinger list_for_each_entry_safe(pr_reg, pr_reg_tmp, 3226c66ac9dbSNicholas Bellinger &pr_tmpl->registration_list, pr_reg_list) { 3227c66ac9dbSNicholas Bellinger 3228c66ac9dbSNicholas Bellinger calling_it_nexus = (pr_reg_n == pr_reg) ? 1 : 0; 3229c66ac9dbSNicholas Bellinger if (calling_it_nexus) 3230c66ac9dbSNicholas Bellinger continue; 3231c66ac9dbSNicholas Bellinger 3232c66ac9dbSNicholas Bellinger core_scsi3_ua_allocate(pr_reg->pr_reg_nacl, 3233c66ac9dbSNicholas Bellinger pr_reg->pr_res_mapped_lun, 0x2A, 3234c66ac9dbSNicholas Bellinger ASCQ_2AH_RESERVATIONS_RELEASED); 3235c66ac9dbSNicholas Bellinger } 3236c66ac9dbSNicholas Bellinger spin_unlock(&pr_tmpl->registration_lock); 3237c66ac9dbSNicholas Bellinger } 3238c66ac9dbSNicholas Bellinger spin_unlock(&dev->dev_reservation_lock); 3239c66ac9dbSNicholas Bellinger /* 3240c66ac9dbSNicholas Bellinger * Call LUN_RESET logic upon list of struct t10_pr_registration, 3241c66ac9dbSNicholas Bellinger * All received CDBs for the matching existing reservation and 3242c66ac9dbSNicholas Bellinger * registrations undergo ABORT_TASK logic. 3243c66ac9dbSNicholas Bellinger * 3244c66ac9dbSNicholas Bellinger * From there, core_scsi3_release_preempt_and_abort() will 3245c66ac9dbSNicholas Bellinger * release every registration in the list (which have already 3246c66ac9dbSNicholas Bellinger * been removed from the primary pr_reg list), except the 3247c66ac9dbSNicholas Bellinger * new persistent reservation holder, the calling Initiator Port. 3248c66ac9dbSNicholas Bellinger */ 3249c66ac9dbSNicholas Bellinger if (abort) { 3250c66ac9dbSNicholas Bellinger core_tmr_lun_reset(dev, NULL, &preempt_and_abort_list, cmd); 3251c66ac9dbSNicholas Bellinger core_scsi3_release_preempt_and_abort(&preempt_and_abort_list, 3252c66ac9dbSNicholas Bellinger pr_reg_n); 3253c66ac9dbSNicholas Bellinger } 3254c66ac9dbSNicholas Bellinger 3255c66ac9dbSNicholas Bellinger if (pr_tmpl->pr_aptpl_active) { 32565951146dSAndy Grover ret = core_scsi3_update_and_write_aptpl(cmd->se_dev, 3257c66ac9dbSNicholas Bellinger &pr_reg_n->pr_aptpl_buf[0], 3258c66ac9dbSNicholas Bellinger pr_tmpl->pr_aptpl_buf_len); 3259c66ac9dbSNicholas Bellinger if (!(ret)) 3260c66ac9dbSNicholas Bellinger printk("SPC-3 PR: Updated APTPL metadata for PREEMPT" 3261c66ac9dbSNicholas Bellinger "%s\n", (abort) ? "_AND_ABORT" : ""); 3262c66ac9dbSNicholas Bellinger } 3263c66ac9dbSNicholas Bellinger 3264c66ac9dbSNicholas Bellinger core_scsi3_put_pr_reg(pr_reg_n); 32655951146dSAndy Grover core_scsi3_pr_generation(cmd->se_dev); 3266c66ac9dbSNicholas Bellinger return 0; 3267c66ac9dbSNicholas Bellinger } 3268c66ac9dbSNicholas Bellinger 3269c66ac9dbSNicholas Bellinger static int core_scsi3_emulate_pro_preempt( 3270c66ac9dbSNicholas Bellinger struct se_cmd *cmd, 3271c66ac9dbSNicholas Bellinger int type, 3272c66ac9dbSNicholas Bellinger int scope, 3273c66ac9dbSNicholas Bellinger u64 res_key, 3274c66ac9dbSNicholas Bellinger u64 sa_res_key, 3275c66ac9dbSNicholas Bellinger int abort) 3276c66ac9dbSNicholas Bellinger { 3277c66ac9dbSNicholas Bellinger int ret = 0; 3278c66ac9dbSNicholas Bellinger 3279c66ac9dbSNicholas Bellinger switch (type) { 3280c66ac9dbSNicholas Bellinger case PR_TYPE_WRITE_EXCLUSIVE: 3281c66ac9dbSNicholas Bellinger case PR_TYPE_EXCLUSIVE_ACCESS: 3282c66ac9dbSNicholas Bellinger case PR_TYPE_WRITE_EXCLUSIVE_REGONLY: 3283c66ac9dbSNicholas Bellinger case PR_TYPE_EXCLUSIVE_ACCESS_REGONLY: 3284c66ac9dbSNicholas Bellinger case PR_TYPE_WRITE_EXCLUSIVE_ALLREG: 3285c66ac9dbSNicholas Bellinger case PR_TYPE_EXCLUSIVE_ACCESS_ALLREG: 3286c66ac9dbSNicholas Bellinger ret = core_scsi3_pro_preempt(cmd, type, scope, 3287c66ac9dbSNicholas Bellinger res_key, sa_res_key, abort); 3288c66ac9dbSNicholas Bellinger break; 3289c66ac9dbSNicholas Bellinger default: 3290c66ac9dbSNicholas Bellinger printk(KERN_ERR "SPC-3 PR: Unknown Service Action PREEMPT%s" 3291c66ac9dbSNicholas Bellinger " Type: 0x%02x\n", (abort) ? "_AND_ABORT" : "", type); 3292c66ac9dbSNicholas Bellinger return PYX_TRANSPORT_INVALID_CDB_FIELD; 3293c66ac9dbSNicholas Bellinger } 3294c66ac9dbSNicholas Bellinger 3295c66ac9dbSNicholas Bellinger return ret; 3296c66ac9dbSNicholas Bellinger } 3297c66ac9dbSNicholas Bellinger 3298c66ac9dbSNicholas Bellinger 3299c66ac9dbSNicholas Bellinger static int core_scsi3_emulate_pro_register_and_move( 3300c66ac9dbSNicholas Bellinger struct se_cmd *cmd, 3301c66ac9dbSNicholas Bellinger u64 res_key, 3302c66ac9dbSNicholas Bellinger u64 sa_res_key, 3303c66ac9dbSNicholas Bellinger int aptpl, 3304c66ac9dbSNicholas Bellinger int unreg) 3305c66ac9dbSNicholas Bellinger { 3306e3d6f909SAndy Grover struct se_session *se_sess = cmd->se_sess; 33075951146dSAndy Grover struct se_device *dev = cmd->se_dev; 3308c66ac9dbSNicholas Bellinger struct se_dev_entry *se_deve, *dest_se_deve = NULL; 3309e3d6f909SAndy Grover struct se_lun *se_lun = cmd->se_lun; 3310c66ac9dbSNicholas Bellinger struct se_node_acl *pr_res_nacl, *pr_reg_nacl, *dest_node_acl = NULL; 3311c66ac9dbSNicholas Bellinger struct se_port *se_port; 3312c66ac9dbSNicholas Bellinger struct se_portal_group *se_tpg, *dest_se_tpg = NULL; 3313c66ac9dbSNicholas Bellinger struct target_core_fabric_ops *dest_tf_ops = NULL, *tf_ops; 3314c66ac9dbSNicholas Bellinger struct t10_pr_registration *pr_reg, *pr_res_holder, *dest_pr_reg; 3315e3d6f909SAndy Grover struct t10_reservation *pr_tmpl = &dev->se_sub_dev->t10_pr; 331605d1c7c0SAndy Grover unsigned char *buf; 3317c66ac9dbSNicholas Bellinger unsigned char *initiator_str; 3318c66ac9dbSNicholas Bellinger char *iport_ptr = NULL, dest_iport[64], i_buf[PR_REG_ISID_ID_LEN]; 3319c66ac9dbSNicholas Bellinger u32 tid_len, tmp_tid_len; 3320c66ac9dbSNicholas Bellinger int new_reg = 0, type, scope, ret, matching_iname, prf_isid; 3321c66ac9dbSNicholas Bellinger unsigned short rtpi; 3322c66ac9dbSNicholas Bellinger unsigned char proto_ident; 3323c66ac9dbSNicholas Bellinger 3324c66ac9dbSNicholas Bellinger if (!(se_sess) || !(se_lun)) { 3325c66ac9dbSNicholas Bellinger printk(KERN_ERR "SPC-3 PR: se_sess || struct se_lun is NULL!\n"); 3326c66ac9dbSNicholas Bellinger return PYX_TRANSPORT_LU_COMM_FAILURE; 3327c66ac9dbSNicholas Bellinger } 3328c66ac9dbSNicholas Bellinger memset(dest_iport, 0, 64); 3329c66ac9dbSNicholas Bellinger memset(i_buf, 0, PR_REG_ISID_ID_LEN); 3330c66ac9dbSNicholas Bellinger se_tpg = se_sess->se_tpg; 3331e3d6f909SAndy Grover tf_ops = se_tpg->se_tpg_tfo; 3332c66ac9dbSNicholas Bellinger se_deve = &se_sess->se_node_acl->device_list[cmd->orig_fe_lun]; 3333c66ac9dbSNicholas Bellinger /* 3334c66ac9dbSNicholas Bellinger * Follow logic from spc4r17 Section 5.7.8, Table 50 -- 3335c66ac9dbSNicholas Bellinger * Register behaviors for a REGISTER AND MOVE service action 3336c66ac9dbSNicholas Bellinger * 3337c66ac9dbSNicholas Bellinger * Locate the existing *pr_reg via struct se_node_acl pointers 3338c66ac9dbSNicholas Bellinger */ 33395951146dSAndy Grover pr_reg = core_scsi3_locate_pr_reg(cmd->se_dev, se_sess->se_node_acl, 3340c66ac9dbSNicholas Bellinger se_sess); 3341c66ac9dbSNicholas Bellinger if (!(pr_reg)) { 3342c66ac9dbSNicholas Bellinger printk(KERN_ERR "SPC-3 PR: Unable to locate PR_REGISTERED" 3343c66ac9dbSNicholas Bellinger " *pr_reg for REGISTER_AND_MOVE\n"); 3344c66ac9dbSNicholas Bellinger return PYX_TRANSPORT_LU_COMM_FAILURE; 3345c66ac9dbSNicholas Bellinger } 3346c66ac9dbSNicholas Bellinger /* 3347c66ac9dbSNicholas Bellinger * The provided reservation key much match the existing reservation key 3348c66ac9dbSNicholas Bellinger * provided during this initiator's I_T nexus registration. 3349c66ac9dbSNicholas Bellinger */ 3350c66ac9dbSNicholas Bellinger if (res_key != pr_reg->pr_res_key) { 3351c66ac9dbSNicholas Bellinger printk(KERN_WARNING "SPC-3 PR REGISTER_AND_MOVE: Received" 3352c66ac9dbSNicholas Bellinger " res_key: 0x%016Lx does not match existing SA REGISTER" 3353c66ac9dbSNicholas Bellinger " res_key: 0x%016Lx\n", res_key, pr_reg->pr_res_key); 3354c66ac9dbSNicholas Bellinger core_scsi3_put_pr_reg(pr_reg); 3355c66ac9dbSNicholas Bellinger return PYX_TRANSPORT_RESERVATION_CONFLICT; 3356c66ac9dbSNicholas Bellinger } 3357c66ac9dbSNicholas Bellinger /* 3358c66ac9dbSNicholas Bellinger * The service active reservation key needs to be non zero 3359c66ac9dbSNicholas Bellinger */ 3360c66ac9dbSNicholas Bellinger if (!(sa_res_key)) { 3361c66ac9dbSNicholas Bellinger printk(KERN_WARNING "SPC-3 PR REGISTER_AND_MOVE: Received zero" 3362c66ac9dbSNicholas Bellinger " sa_res_key\n"); 3363c66ac9dbSNicholas Bellinger core_scsi3_put_pr_reg(pr_reg); 3364c66ac9dbSNicholas Bellinger return PYX_TRANSPORT_INVALID_PARAMETER_LIST; 3365c66ac9dbSNicholas Bellinger } 336605d1c7c0SAndy Grover 3367c66ac9dbSNicholas Bellinger /* 3368c66ac9dbSNicholas Bellinger * Determine the Relative Target Port Identifier where the reservation 3369c66ac9dbSNicholas Bellinger * will be moved to for the TransportID containing SCSI initiator WWN 3370c66ac9dbSNicholas Bellinger * information. 3371c66ac9dbSNicholas Bellinger */ 337205d1c7c0SAndy Grover buf = transport_kmap_first_data_page(cmd); 3373c66ac9dbSNicholas Bellinger rtpi = (buf[18] & 0xff) << 8; 3374c66ac9dbSNicholas Bellinger rtpi |= buf[19] & 0xff; 3375c66ac9dbSNicholas Bellinger tid_len = (buf[20] & 0xff) << 24; 3376c66ac9dbSNicholas Bellinger tid_len |= (buf[21] & 0xff) << 16; 3377c66ac9dbSNicholas Bellinger tid_len |= (buf[22] & 0xff) << 8; 3378c66ac9dbSNicholas Bellinger tid_len |= buf[23] & 0xff; 337905d1c7c0SAndy Grover transport_kunmap_first_data_page(cmd); 338005d1c7c0SAndy Grover buf = NULL; 3381c66ac9dbSNicholas Bellinger 3382c66ac9dbSNicholas Bellinger if ((tid_len + 24) != cmd->data_length) { 3383c66ac9dbSNicholas Bellinger printk(KERN_ERR "SPC-3 PR: Illegal tid_len: %u + 24 byte header" 3384c66ac9dbSNicholas Bellinger " does not equal CDB data_length: %u\n", tid_len, 3385c66ac9dbSNicholas Bellinger cmd->data_length); 3386c66ac9dbSNicholas Bellinger core_scsi3_put_pr_reg(pr_reg); 3387c66ac9dbSNicholas Bellinger return PYX_TRANSPORT_INVALID_PARAMETER_LIST; 3388c66ac9dbSNicholas Bellinger } 3389c66ac9dbSNicholas Bellinger 3390c66ac9dbSNicholas Bellinger spin_lock(&dev->se_port_lock); 3391c66ac9dbSNicholas Bellinger list_for_each_entry(se_port, &dev->dev_sep_list, sep_list) { 3392c66ac9dbSNicholas Bellinger if (se_port->sep_rtpi != rtpi) 3393c66ac9dbSNicholas Bellinger continue; 3394c66ac9dbSNicholas Bellinger dest_se_tpg = se_port->sep_tpg; 3395c66ac9dbSNicholas Bellinger if (!(dest_se_tpg)) 3396c66ac9dbSNicholas Bellinger continue; 3397e3d6f909SAndy Grover dest_tf_ops = dest_se_tpg->se_tpg_tfo; 3398c66ac9dbSNicholas Bellinger if (!(dest_tf_ops)) 3399c66ac9dbSNicholas Bellinger continue; 3400c66ac9dbSNicholas Bellinger 3401c66ac9dbSNicholas Bellinger atomic_inc(&dest_se_tpg->tpg_pr_ref_count); 3402c66ac9dbSNicholas Bellinger smp_mb__after_atomic_inc(); 3403c66ac9dbSNicholas Bellinger spin_unlock(&dev->se_port_lock); 3404c66ac9dbSNicholas Bellinger 3405c66ac9dbSNicholas Bellinger ret = core_scsi3_tpg_depend_item(dest_se_tpg); 3406c66ac9dbSNicholas Bellinger if (ret != 0) { 3407c66ac9dbSNicholas Bellinger printk(KERN_ERR "core_scsi3_tpg_depend_item() failed" 3408c66ac9dbSNicholas Bellinger " for dest_se_tpg\n"); 3409c66ac9dbSNicholas Bellinger atomic_dec(&dest_se_tpg->tpg_pr_ref_count); 3410c66ac9dbSNicholas Bellinger smp_mb__after_atomic_dec(); 3411c66ac9dbSNicholas Bellinger core_scsi3_put_pr_reg(pr_reg); 3412c66ac9dbSNicholas Bellinger return PYX_TRANSPORT_LU_COMM_FAILURE; 3413c66ac9dbSNicholas Bellinger } 3414c66ac9dbSNicholas Bellinger 3415c66ac9dbSNicholas Bellinger spin_lock(&dev->se_port_lock); 3416c66ac9dbSNicholas Bellinger break; 3417c66ac9dbSNicholas Bellinger } 3418c66ac9dbSNicholas Bellinger spin_unlock(&dev->se_port_lock); 3419c66ac9dbSNicholas Bellinger 3420c66ac9dbSNicholas Bellinger if (!(dest_se_tpg) || (!dest_tf_ops)) { 3421c66ac9dbSNicholas Bellinger printk(KERN_ERR "SPC-3 PR REGISTER_AND_MOVE: Unable to locate" 3422c66ac9dbSNicholas Bellinger " fabric ops from Relative Target Port Identifier:" 3423c66ac9dbSNicholas Bellinger " %hu\n", rtpi); 3424c66ac9dbSNicholas Bellinger core_scsi3_put_pr_reg(pr_reg); 3425c66ac9dbSNicholas Bellinger return PYX_TRANSPORT_INVALID_PARAMETER_LIST; 3426c66ac9dbSNicholas Bellinger } 342705d1c7c0SAndy Grover 342805d1c7c0SAndy Grover buf = transport_kmap_first_data_page(cmd); 3429c66ac9dbSNicholas Bellinger proto_ident = (buf[24] & 0x0f); 3430c66ac9dbSNicholas Bellinger #if 0 3431c66ac9dbSNicholas Bellinger printk("SPC-3 PR REGISTER_AND_MOVE: Extracted Protocol Identifier:" 3432c66ac9dbSNicholas Bellinger " 0x%02x\n", proto_ident); 3433c66ac9dbSNicholas Bellinger #endif 3434c66ac9dbSNicholas Bellinger if (proto_ident != dest_tf_ops->get_fabric_proto_ident(dest_se_tpg)) { 3435c66ac9dbSNicholas Bellinger printk(KERN_ERR "SPC-3 PR REGISTER_AND_MOVE: Received" 3436c66ac9dbSNicholas Bellinger " proto_ident: 0x%02x does not match ident: 0x%02x" 3437c66ac9dbSNicholas Bellinger " from fabric: %s\n", proto_ident, 3438c66ac9dbSNicholas Bellinger dest_tf_ops->get_fabric_proto_ident(dest_se_tpg), 3439c66ac9dbSNicholas Bellinger dest_tf_ops->get_fabric_name()); 3440c66ac9dbSNicholas Bellinger ret = PYX_TRANSPORT_INVALID_PARAMETER_LIST; 3441c66ac9dbSNicholas Bellinger goto out; 3442c66ac9dbSNicholas Bellinger } 3443c66ac9dbSNicholas Bellinger if (dest_tf_ops->tpg_parse_pr_out_transport_id == NULL) { 3444c66ac9dbSNicholas Bellinger printk(KERN_ERR "SPC-3 PR REGISTER_AND_MOVE: Fabric does not" 3445c66ac9dbSNicholas Bellinger " containg a valid tpg_parse_pr_out_transport_id" 3446c66ac9dbSNicholas Bellinger " function pointer\n"); 3447c66ac9dbSNicholas Bellinger ret = PYX_TRANSPORT_LU_COMM_FAILURE; 3448c66ac9dbSNicholas Bellinger goto out; 3449c66ac9dbSNicholas Bellinger } 3450c66ac9dbSNicholas Bellinger initiator_str = dest_tf_ops->tpg_parse_pr_out_transport_id(dest_se_tpg, 3451c66ac9dbSNicholas Bellinger (const char *)&buf[24], &tmp_tid_len, &iport_ptr); 3452c66ac9dbSNicholas Bellinger if (!(initiator_str)) { 3453c66ac9dbSNicholas Bellinger printk(KERN_ERR "SPC-3 PR REGISTER_AND_MOVE: Unable to locate" 3454c66ac9dbSNicholas Bellinger " initiator_str from Transport ID\n"); 3455c66ac9dbSNicholas Bellinger ret = PYX_TRANSPORT_INVALID_PARAMETER_LIST; 3456c66ac9dbSNicholas Bellinger goto out; 3457c66ac9dbSNicholas Bellinger } 3458c66ac9dbSNicholas Bellinger 345905d1c7c0SAndy Grover transport_kunmap_first_data_page(cmd); 346005d1c7c0SAndy Grover buf = NULL; 346105d1c7c0SAndy Grover 3462c66ac9dbSNicholas Bellinger printk(KERN_INFO "SPC-3 PR [%s] Extracted initiator %s identifier: %s" 3463c66ac9dbSNicholas Bellinger " %s\n", dest_tf_ops->get_fabric_name(), (iport_ptr != NULL) ? 3464c66ac9dbSNicholas Bellinger "port" : "device", initiator_str, (iport_ptr != NULL) ? 3465c66ac9dbSNicholas Bellinger iport_ptr : ""); 3466c66ac9dbSNicholas Bellinger /* 3467c66ac9dbSNicholas Bellinger * If a PERSISTENT RESERVE OUT command with a REGISTER AND MOVE service 3468c66ac9dbSNicholas Bellinger * action specifies a TransportID that is the same as the initiator port 3469c66ac9dbSNicholas Bellinger * of the I_T nexus for the command received, then the command shall 3470c66ac9dbSNicholas Bellinger * be terminated with CHECK CONDITION status, with the sense key set to 3471c66ac9dbSNicholas Bellinger * ILLEGAL REQUEST, and the additional sense code set to INVALID FIELD 3472c66ac9dbSNicholas Bellinger * IN PARAMETER LIST. 3473c66ac9dbSNicholas Bellinger */ 3474c66ac9dbSNicholas Bellinger pr_reg_nacl = pr_reg->pr_reg_nacl; 3475c66ac9dbSNicholas Bellinger matching_iname = (!strcmp(initiator_str, 3476c66ac9dbSNicholas Bellinger pr_reg_nacl->initiatorname)) ? 1 : 0; 3477c66ac9dbSNicholas Bellinger if (!(matching_iname)) 3478c66ac9dbSNicholas Bellinger goto after_iport_check; 3479c66ac9dbSNicholas Bellinger 3480c66ac9dbSNicholas Bellinger if (!(iport_ptr) || !(pr_reg->isid_present_at_reg)) { 3481c66ac9dbSNicholas Bellinger printk(KERN_ERR "SPC-3 PR REGISTER_AND_MOVE: TransportID: %s" 3482c66ac9dbSNicholas Bellinger " matches: %s on received I_T Nexus\n", initiator_str, 3483c66ac9dbSNicholas Bellinger pr_reg_nacl->initiatorname); 3484c66ac9dbSNicholas Bellinger ret = PYX_TRANSPORT_INVALID_PARAMETER_LIST; 3485c66ac9dbSNicholas Bellinger goto out; 3486c66ac9dbSNicholas Bellinger } 3487c66ac9dbSNicholas Bellinger if (!(strcmp(iport_ptr, pr_reg->pr_reg_isid))) { 3488c66ac9dbSNicholas Bellinger printk(KERN_ERR "SPC-3 PR REGISTER_AND_MOVE: TransportID: %s %s" 3489c66ac9dbSNicholas Bellinger " matches: %s %s on received I_T Nexus\n", 3490c66ac9dbSNicholas Bellinger initiator_str, iport_ptr, pr_reg_nacl->initiatorname, 3491c66ac9dbSNicholas Bellinger pr_reg->pr_reg_isid); 3492c66ac9dbSNicholas Bellinger ret = PYX_TRANSPORT_INVALID_PARAMETER_LIST; 3493c66ac9dbSNicholas Bellinger goto out; 3494c66ac9dbSNicholas Bellinger } 3495c66ac9dbSNicholas Bellinger after_iport_check: 3496c66ac9dbSNicholas Bellinger /* 3497c66ac9dbSNicholas Bellinger * Locate the destination struct se_node_acl from the received Transport ID 3498c66ac9dbSNicholas Bellinger */ 3499c66ac9dbSNicholas Bellinger spin_lock_bh(&dest_se_tpg->acl_node_lock); 3500c66ac9dbSNicholas Bellinger dest_node_acl = __core_tpg_get_initiator_node_acl(dest_se_tpg, 3501c66ac9dbSNicholas Bellinger initiator_str); 3502c66ac9dbSNicholas Bellinger if (dest_node_acl) { 3503c66ac9dbSNicholas Bellinger atomic_inc(&dest_node_acl->acl_pr_ref_count); 3504c66ac9dbSNicholas Bellinger smp_mb__after_atomic_inc(); 3505c66ac9dbSNicholas Bellinger } 3506c66ac9dbSNicholas Bellinger spin_unlock_bh(&dest_se_tpg->acl_node_lock); 3507c66ac9dbSNicholas Bellinger 3508c66ac9dbSNicholas Bellinger if (!(dest_node_acl)) { 3509c66ac9dbSNicholas Bellinger printk(KERN_ERR "Unable to locate %s dest_node_acl for" 3510c66ac9dbSNicholas Bellinger " TransportID%s\n", dest_tf_ops->get_fabric_name(), 3511c66ac9dbSNicholas Bellinger initiator_str); 3512c66ac9dbSNicholas Bellinger ret = PYX_TRANSPORT_INVALID_PARAMETER_LIST; 3513c66ac9dbSNicholas Bellinger goto out; 3514c66ac9dbSNicholas Bellinger } 3515c66ac9dbSNicholas Bellinger ret = core_scsi3_nodeacl_depend_item(dest_node_acl); 3516c66ac9dbSNicholas Bellinger if (ret != 0) { 3517c66ac9dbSNicholas Bellinger printk(KERN_ERR "core_scsi3_nodeacl_depend_item() for" 3518c66ac9dbSNicholas Bellinger " dest_node_acl\n"); 3519c66ac9dbSNicholas Bellinger atomic_dec(&dest_node_acl->acl_pr_ref_count); 3520c66ac9dbSNicholas Bellinger smp_mb__after_atomic_dec(); 3521c66ac9dbSNicholas Bellinger dest_node_acl = NULL; 3522c66ac9dbSNicholas Bellinger ret = PYX_TRANSPORT_LU_COMM_FAILURE; 3523c66ac9dbSNicholas Bellinger goto out; 3524c66ac9dbSNicholas Bellinger } 3525c66ac9dbSNicholas Bellinger #if 0 3526c66ac9dbSNicholas Bellinger printk(KERN_INFO "SPC-3 PR REGISTER_AND_MOVE: Found %s dest_node_acl:" 3527c66ac9dbSNicholas Bellinger " %s from TransportID\n", dest_tf_ops->get_fabric_name(), 3528c66ac9dbSNicholas Bellinger dest_node_acl->initiatorname); 3529c66ac9dbSNicholas Bellinger #endif 3530c66ac9dbSNicholas Bellinger /* 3531c66ac9dbSNicholas Bellinger * Locate the struct se_dev_entry pointer for the matching RELATIVE TARGET 3532c66ac9dbSNicholas Bellinger * PORT IDENTIFIER. 3533c66ac9dbSNicholas Bellinger */ 3534c66ac9dbSNicholas Bellinger dest_se_deve = core_get_se_deve_from_rtpi(dest_node_acl, rtpi); 3535c66ac9dbSNicholas Bellinger if (!(dest_se_deve)) { 3536c66ac9dbSNicholas Bellinger printk(KERN_ERR "Unable to locate %s dest_se_deve from RTPI:" 3537c66ac9dbSNicholas Bellinger " %hu\n", dest_tf_ops->get_fabric_name(), rtpi); 3538c66ac9dbSNicholas Bellinger ret = PYX_TRANSPORT_INVALID_PARAMETER_LIST; 3539c66ac9dbSNicholas Bellinger goto out; 3540c66ac9dbSNicholas Bellinger } 3541c66ac9dbSNicholas Bellinger 3542c66ac9dbSNicholas Bellinger ret = core_scsi3_lunacl_depend_item(dest_se_deve); 3543c66ac9dbSNicholas Bellinger if (ret < 0) { 3544c66ac9dbSNicholas Bellinger printk(KERN_ERR "core_scsi3_lunacl_depend_item() failed\n"); 3545c66ac9dbSNicholas Bellinger atomic_dec(&dest_se_deve->pr_ref_count); 3546c66ac9dbSNicholas Bellinger smp_mb__after_atomic_dec(); 3547c66ac9dbSNicholas Bellinger dest_se_deve = NULL; 3548c66ac9dbSNicholas Bellinger ret = PYX_TRANSPORT_LU_COMM_FAILURE; 3549c66ac9dbSNicholas Bellinger goto out; 3550c66ac9dbSNicholas Bellinger } 3551c66ac9dbSNicholas Bellinger #if 0 3552c66ac9dbSNicholas Bellinger printk(KERN_INFO "SPC-3 PR REGISTER_AND_MOVE: Located %s node %s LUN" 3553c66ac9dbSNicholas Bellinger " ACL for dest_se_deve->mapped_lun: %u\n", 3554c66ac9dbSNicholas Bellinger dest_tf_ops->get_fabric_name(), dest_node_acl->initiatorname, 3555c66ac9dbSNicholas Bellinger dest_se_deve->mapped_lun); 3556c66ac9dbSNicholas Bellinger #endif 3557c66ac9dbSNicholas Bellinger /* 3558c66ac9dbSNicholas Bellinger * A persistent reservation needs to already existing in order to 3559c66ac9dbSNicholas Bellinger * successfully complete the REGISTER_AND_MOVE service action.. 3560c66ac9dbSNicholas Bellinger */ 3561c66ac9dbSNicholas Bellinger spin_lock(&dev->dev_reservation_lock); 3562c66ac9dbSNicholas Bellinger pr_res_holder = dev->dev_pr_res_holder; 3563c66ac9dbSNicholas Bellinger if (!(pr_res_holder)) { 3564c66ac9dbSNicholas Bellinger printk(KERN_WARNING "SPC-3 PR REGISTER_AND_MOVE: No reservation" 3565c66ac9dbSNicholas Bellinger " currently held\n"); 3566c66ac9dbSNicholas Bellinger spin_unlock(&dev->dev_reservation_lock); 3567c66ac9dbSNicholas Bellinger ret = PYX_TRANSPORT_INVALID_CDB_FIELD; 3568c66ac9dbSNicholas Bellinger goto out; 3569c66ac9dbSNicholas Bellinger } 3570c66ac9dbSNicholas Bellinger /* 3571c66ac9dbSNicholas Bellinger * The received on I_T Nexus must be the reservation holder. 3572c66ac9dbSNicholas Bellinger * 3573c66ac9dbSNicholas Bellinger * From spc4r17 section 5.7.8 Table 50 -- 3574c66ac9dbSNicholas Bellinger * Register behaviors for a REGISTER AND MOVE service action 3575c66ac9dbSNicholas Bellinger */ 3576c66ac9dbSNicholas Bellinger if (pr_res_holder != pr_reg) { 3577c66ac9dbSNicholas Bellinger printk(KERN_WARNING "SPC-3 PR REGISTER_AND_MOVE: Calling I_T" 3578c66ac9dbSNicholas Bellinger " Nexus is not reservation holder\n"); 3579c66ac9dbSNicholas Bellinger spin_unlock(&dev->dev_reservation_lock); 3580c66ac9dbSNicholas Bellinger ret = PYX_TRANSPORT_RESERVATION_CONFLICT; 3581c66ac9dbSNicholas Bellinger goto out; 3582c66ac9dbSNicholas Bellinger } 3583c66ac9dbSNicholas Bellinger /* 3584c66ac9dbSNicholas Bellinger * From spc4r17 section 5.7.8: registering and moving reservation 3585c66ac9dbSNicholas Bellinger * 3586c66ac9dbSNicholas Bellinger * If a PERSISTENT RESERVE OUT command with a REGISTER AND MOVE service 3587c66ac9dbSNicholas Bellinger * action is received and the established persistent reservation is a 3588c66ac9dbSNicholas Bellinger * Write Exclusive - All Registrants type or Exclusive Access - 3589c66ac9dbSNicholas Bellinger * All Registrants type reservation, then the command shall be completed 3590c66ac9dbSNicholas Bellinger * with RESERVATION CONFLICT status. 3591c66ac9dbSNicholas Bellinger */ 3592c66ac9dbSNicholas Bellinger if ((pr_res_holder->pr_res_type == PR_TYPE_WRITE_EXCLUSIVE_ALLREG) || 3593c66ac9dbSNicholas Bellinger (pr_res_holder->pr_res_type == PR_TYPE_EXCLUSIVE_ACCESS_ALLREG)) { 3594c66ac9dbSNicholas Bellinger printk(KERN_WARNING "SPC-3 PR REGISTER_AND_MOVE: Unable to move" 3595c66ac9dbSNicholas Bellinger " reservation for type: %s\n", 3596c66ac9dbSNicholas Bellinger core_scsi3_pr_dump_type(pr_res_holder->pr_res_type)); 3597c66ac9dbSNicholas Bellinger spin_unlock(&dev->dev_reservation_lock); 3598c66ac9dbSNicholas Bellinger ret = PYX_TRANSPORT_RESERVATION_CONFLICT; 3599c66ac9dbSNicholas Bellinger goto out; 3600c66ac9dbSNicholas Bellinger } 3601c66ac9dbSNicholas Bellinger pr_res_nacl = pr_res_holder->pr_reg_nacl; 3602c66ac9dbSNicholas Bellinger /* 3603c66ac9dbSNicholas Bellinger * b) Ignore the contents of the (received) SCOPE and TYPE fields; 3604c66ac9dbSNicholas Bellinger */ 3605c66ac9dbSNicholas Bellinger type = pr_res_holder->pr_res_type; 3606c66ac9dbSNicholas Bellinger scope = pr_res_holder->pr_res_type; 3607c66ac9dbSNicholas Bellinger /* 3608c66ac9dbSNicholas Bellinger * c) Associate the reservation key specified in the SERVICE ACTION 3609c66ac9dbSNicholas Bellinger * RESERVATION KEY field with the I_T nexus specified as the 3610c66ac9dbSNicholas Bellinger * destination of the register and move, where: 3611c66ac9dbSNicholas Bellinger * A) The I_T nexus is specified by the TransportID and the 3612c66ac9dbSNicholas Bellinger * RELATIVE TARGET PORT IDENTIFIER field (see 6.14.4); and 3613c66ac9dbSNicholas Bellinger * B) Regardless of the TransportID format used, the association for 3614c66ac9dbSNicholas Bellinger * the initiator port is based on either the initiator port name 3615c66ac9dbSNicholas Bellinger * (see 3.1.71) on SCSI transport protocols where port names are 3616c66ac9dbSNicholas Bellinger * required or the initiator port identifier (see 3.1.70) on SCSI 3617c66ac9dbSNicholas Bellinger * transport protocols where port names are not required; 3618c66ac9dbSNicholas Bellinger * d) Register the reservation key specified in the SERVICE ACTION 3619c66ac9dbSNicholas Bellinger * RESERVATION KEY field; 3620c66ac9dbSNicholas Bellinger * e) Retain the reservation key specified in the SERVICE ACTION 3621c66ac9dbSNicholas Bellinger * RESERVATION KEY field and associated information; 3622c66ac9dbSNicholas Bellinger * 3623c66ac9dbSNicholas Bellinger * Also, It is not an error for a REGISTER AND MOVE service action to 3624c66ac9dbSNicholas Bellinger * register an I_T nexus that is already registered with the same 3625c66ac9dbSNicholas Bellinger * reservation key or a different reservation key. 3626c66ac9dbSNicholas Bellinger */ 3627c66ac9dbSNicholas Bellinger dest_pr_reg = __core_scsi3_locate_pr_reg(dev, dest_node_acl, 3628c66ac9dbSNicholas Bellinger iport_ptr); 3629c66ac9dbSNicholas Bellinger if (!(dest_pr_reg)) { 36305951146dSAndy Grover ret = core_scsi3_alloc_registration(cmd->se_dev, 3631c66ac9dbSNicholas Bellinger dest_node_acl, dest_se_deve, iport_ptr, 3632c66ac9dbSNicholas Bellinger sa_res_key, 0, aptpl, 2, 1); 3633c66ac9dbSNicholas Bellinger if (ret != 0) { 3634c66ac9dbSNicholas Bellinger spin_unlock(&dev->dev_reservation_lock); 3635c66ac9dbSNicholas Bellinger ret = PYX_TRANSPORT_INVALID_PARAMETER_LIST; 3636c66ac9dbSNicholas Bellinger goto out; 3637c66ac9dbSNicholas Bellinger } 3638c66ac9dbSNicholas Bellinger dest_pr_reg = __core_scsi3_locate_pr_reg(dev, dest_node_acl, 3639c66ac9dbSNicholas Bellinger iport_ptr); 3640c66ac9dbSNicholas Bellinger new_reg = 1; 3641c66ac9dbSNicholas Bellinger } 3642c66ac9dbSNicholas Bellinger /* 3643c66ac9dbSNicholas Bellinger * f) Release the persistent reservation for the persistent reservation 3644c66ac9dbSNicholas Bellinger * holder (i.e., the I_T nexus on which the 3645c66ac9dbSNicholas Bellinger */ 3646c66ac9dbSNicholas Bellinger __core_scsi3_complete_pro_release(dev, pr_res_nacl, 3647c66ac9dbSNicholas Bellinger dev->dev_pr_res_holder, 0); 3648c66ac9dbSNicholas Bellinger /* 3649c66ac9dbSNicholas Bellinger * g) Move the persistent reservation to the specified I_T nexus using 3650c66ac9dbSNicholas Bellinger * the same scope and type as the persistent reservation released in 3651c66ac9dbSNicholas Bellinger * item f); and 3652c66ac9dbSNicholas Bellinger */ 3653c66ac9dbSNicholas Bellinger dev->dev_pr_res_holder = dest_pr_reg; 3654c66ac9dbSNicholas Bellinger dest_pr_reg->pr_res_holder = 1; 3655c66ac9dbSNicholas Bellinger dest_pr_reg->pr_res_type = type; 3656c66ac9dbSNicholas Bellinger pr_reg->pr_res_scope = scope; 3657c66ac9dbSNicholas Bellinger prf_isid = core_pr_dump_initiator_port(pr_reg, &i_buf[0], 3658c66ac9dbSNicholas Bellinger PR_REG_ISID_ID_LEN); 3659c66ac9dbSNicholas Bellinger /* 3660c66ac9dbSNicholas Bellinger * Increment PRGeneration for existing registrations.. 3661c66ac9dbSNicholas Bellinger */ 3662c66ac9dbSNicholas Bellinger if (!(new_reg)) 3663c66ac9dbSNicholas Bellinger dest_pr_reg->pr_res_generation = pr_tmpl->pr_generation++; 3664c66ac9dbSNicholas Bellinger spin_unlock(&dev->dev_reservation_lock); 3665c66ac9dbSNicholas Bellinger 3666c66ac9dbSNicholas Bellinger printk(KERN_INFO "SPC-3 PR [%s] Service Action: REGISTER_AND_MOVE" 3667c66ac9dbSNicholas Bellinger " created new reservation holder TYPE: %s on object RTPI:" 3668c66ac9dbSNicholas Bellinger " %hu PRGeneration: 0x%08x\n", dest_tf_ops->get_fabric_name(), 3669c66ac9dbSNicholas Bellinger core_scsi3_pr_dump_type(type), rtpi, 3670c66ac9dbSNicholas Bellinger dest_pr_reg->pr_res_generation); 3671c66ac9dbSNicholas Bellinger printk(KERN_INFO "SPC-3 PR Successfully moved reservation from" 3672c66ac9dbSNicholas Bellinger " %s Fabric Node: %s%s -> %s Fabric Node: %s %s\n", 3673c66ac9dbSNicholas Bellinger tf_ops->get_fabric_name(), pr_reg_nacl->initiatorname, 3674c66ac9dbSNicholas Bellinger (prf_isid) ? &i_buf[0] : "", dest_tf_ops->get_fabric_name(), 3675c66ac9dbSNicholas Bellinger dest_node_acl->initiatorname, (iport_ptr != NULL) ? 3676c66ac9dbSNicholas Bellinger iport_ptr : ""); 3677c66ac9dbSNicholas Bellinger /* 3678c66ac9dbSNicholas Bellinger * It is now safe to release configfs group dependencies for destination 3679c66ac9dbSNicholas Bellinger * of Transport ID Initiator Device/Port Identifier 3680c66ac9dbSNicholas Bellinger */ 3681c66ac9dbSNicholas Bellinger core_scsi3_lunacl_undepend_item(dest_se_deve); 3682c66ac9dbSNicholas Bellinger core_scsi3_nodeacl_undepend_item(dest_node_acl); 3683c66ac9dbSNicholas Bellinger core_scsi3_tpg_undepend_item(dest_se_tpg); 3684c66ac9dbSNicholas Bellinger /* 3685c66ac9dbSNicholas Bellinger * h) If the UNREG bit is set to one, unregister (see 5.7.11.3) the I_T 3686c66ac9dbSNicholas Bellinger * nexus on which PERSISTENT RESERVE OUT command was received. 3687c66ac9dbSNicholas Bellinger */ 3688c66ac9dbSNicholas Bellinger if (unreg) { 3689c66ac9dbSNicholas Bellinger spin_lock(&pr_tmpl->registration_lock); 3690c66ac9dbSNicholas Bellinger __core_scsi3_free_registration(dev, pr_reg, NULL, 1); 3691c66ac9dbSNicholas Bellinger spin_unlock(&pr_tmpl->registration_lock); 3692c66ac9dbSNicholas Bellinger } else 3693c66ac9dbSNicholas Bellinger core_scsi3_put_pr_reg(pr_reg); 3694c66ac9dbSNicholas Bellinger 3695c66ac9dbSNicholas Bellinger /* 3696c66ac9dbSNicholas Bellinger * Clear the APTPL metadata if APTPL has been disabled, otherwise 3697c66ac9dbSNicholas Bellinger * write out the updated metadata to struct file for this SCSI device. 3698c66ac9dbSNicholas Bellinger */ 3699c66ac9dbSNicholas Bellinger if (!(aptpl)) { 3700c66ac9dbSNicholas Bellinger pr_tmpl->pr_aptpl_active = 0; 37015951146dSAndy Grover core_scsi3_update_and_write_aptpl(cmd->se_dev, NULL, 0); 3702c66ac9dbSNicholas Bellinger printk("SPC-3 PR: Set APTPL Bit Deactivated for" 3703c66ac9dbSNicholas Bellinger " REGISTER_AND_MOVE\n"); 3704c66ac9dbSNicholas Bellinger } else { 3705c66ac9dbSNicholas Bellinger pr_tmpl->pr_aptpl_active = 1; 37065951146dSAndy Grover ret = core_scsi3_update_and_write_aptpl(cmd->se_dev, 3707c66ac9dbSNicholas Bellinger &dest_pr_reg->pr_aptpl_buf[0], 3708c66ac9dbSNicholas Bellinger pr_tmpl->pr_aptpl_buf_len); 3709c66ac9dbSNicholas Bellinger if (!(ret)) 3710c66ac9dbSNicholas Bellinger printk("SPC-3 PR: Set APTPL Bit Activated for" 3711c66ac9dbSNicholas Bellinger " REGISTER_AND_MOVE\n"); 3712c66ac9dbSNicholas Bellinger } 3713c66ac9dbSNicholas Bellinger 371405d1c7c0SAndy Grover transport_kunmap_first_data_page(cmd); 371505d1c7c0SAndy Grover 3716c66ac9dbSNicholas Bellinger core_scsi3_put_pr_reg(dest_pr_reg); 3717c66ac9dbSNicholas Bellinger return 0; 3718c66ac9dbSNicholas Bellinger out: 371905d1c7c0SAndy Grover if (buf) 372005d1c7c0SAndy Grover transport_kunmap_first_data_page(cmd); 3721c66ac9dbSNicholas Bellinger if (dest_se_deve) 3722c66ac9dbSNicholas Bellinger core_scsi3_lunacl_undepend_item(dest_se_deve); 3723c66ac9dbSNicholas Bellinger if (dest_node_acl) 3724c66ac9dbSNicholas Bellinger core_scsi3_nodeacl_undepend_item(dest_node_acl); 3725c66ac9dbSNicholas Bellinger core_scsi3_tpg_undepend_item(dest_se_tpg); 3726c66ac9dbSNicholas Bellinger core_scsi3_put_pr_reg(pr_reg); 3727c66ac9dbSNicholas Bellinger return ret; 3728c66ac9dbSNicholas Bellinger } 3729c66ac9dbSNicholas Bellinger 3730c66ac9dbSNicholas Bellinger static unsigned long long core_scsi3_extract_reservation_key(unsigned char *cdb) 3731c66ac9dbSNicholas Bellinger { 3732c66ac9dbSNicholas Bellinger unsigned int __v1, __v2; 3733c66ac9dbSNicholas Bellinger 3734c66ac9dbSNicholas Bellinger __v1 = (cdb[0] << 24) | (cdb[1] << 16) | (cdb[2] << 8) | cdb[3]; 3735c66ac9dbSNicholas Bellinger __v2 = (cdb[4] << 24) | (cdb[5] << 16) | (cdb[6] << 8) | cdb[7]; 3736c66ac9dbSNicholas Bellinger 3737c66ac9dbSNicholas Bellinger return ((unsigned long long)__v2) | (unsigned long long)__v1 << 32; 3738c66ac9dbSNicholas Bellinger } 3739c66ac9dbSNicholas Bellinger 3740c66ac9dbSNicholas Bellinger /* 3741c66ac9dbSNicholas Bellinger * See spc4r17 section 6.14 Table 170 3742c66ac9dbSNicholas Bellinger */ 3743c66ac9dbSNicholas Bellinger static int core_scsi3_emulate_pr_out(struct se_cmd *cmd, unsigned char *cdb) 3744c66ac9dbSNicholas Bellinger { 374505d1c7c0SAndy Grover unsigned char *buf; 3746c66ac9dbSNicholas Bellinger u64 res_key, sa_res_key; 3747c66ac9dbSNicholas Bellinger int sa, scope, type, aptpl; 3748c66ac9dbSNicholas Bellinger int spec_i_pt = 0, all_tg_pt = 0, unreg = 0; 3749c66ac9dbSNicholas Bellinger /* 3750c66ac9dbSNicholas Bellinger * FIXME: A NULL struct se_session pointer means an this is not coming from 3751c66ac9dbSNicholas Bellinger * a $FABRIC_MOD's nexus, but from internal passthrough ops. 3752c66ac9dbSNicholas Bellinger */ 3753e3d6f909SAndy Grover if (!(cmd->se_sess)) 3754c66ac9dbSNicholas Bellinger return PYX_TRANSPORT_LU_COMM_FAILURE; 3755c66ac9dbSNicholas Bellinger 3756c66ac9dbSNicholas Bellinger if (cmd->data_length < 24) { 375725985edcSLucas De Marchi printk(KERN_WARNING "SPC-PR: Received PR OUT parameter list" 3758c66ac9dbSNicholas Bellinger " length too small: %u\n", cmd->data_length); 3759c66ac9dbSNicholas Bellinger return PYX_TRANSPORT_INVALID_PARAMETER_LIST; 3760c66ac9dbSNicholas Bellinger } 3761c66ac9dbSNicholas Bellinger /* 3762c66ac9dbSNicholas Bellinger * From the PERSISTENT_RESERVE_OUT command descriptor block (CDB) 3763c66ac9dbSNicholas Bellinger */ 3764c66ac9dbSNicholas Bellinger sa = (cdb[1] & 0x1f); 3765c66ac9dbSNicholas Bellinger scope = (cdb[2] & 0xf0); 3766c66ac9dbSNicholas Bellinger type = (cdb[2] & 0x0f); 376705d1c7c0SAndy Grover 376805d1c7c0SAndy Grover buf = transport_kmap_first_data_page(cmd); 3769c66ac9dbSNicholas Bellinger /* 3770c66ac9dbSNicholas Bellinger * From PERSISTENT_RESERVE_OUT parameter list (payload) 3771c66ac9dbSNicholas Bellinger */ 3772c66ac9dbSNicholas Bellinger res_key = core_scsi3_extract_reservation_key(&buf[0]); 3773c66ac9dbSNicholas Bellinger sa_res_key = core_scsi3_extract_reservation_key(&buf[8]); 3774c66ac9dbSNicholas Bellinger /* 3775c66ac9dbSNicholas Bellinger * REGISTER_AND_MOVE uses a different SA parameter list containing 3776c66ac9dbSNicholas Bellinger * SCSI TransportIDs. 3777c66ac9dbSNicholas Bellinger */ 3778c66ac9dbSNicholas Bellinger if (sa != PRO_REGISTER_AND_MOVE) { 3779c66ac9dbSNicholas Bellinger spec_i_pt = (buf[20] & 0x08); 3780c66ac9dbSNicholas Bellinger all_tg_pt = (buf[20] & 0x04); 3781c66ac9dbSNicholas Bellinger aptpl = (buf[20] & 0x01); 3782c66ac9dbSNicholas Bellinger } else { 3783c66ac9dbSNicholas Bellinger aptpl = (buf[17] & 0x01); 3784c66ac9dbSNicholas Bellinger unreg = (buf[17] & 0x02); 3785c66ac9dbSNicholas Bellinger } 378605d1c7c0SAndy Grover transport_kunmap_first_data_page(cmd); 378705d1c7c0SAndy Grover buf = NULL; 378805d1c7c0SAndy Grover 3789c66ac9dbSNicholas Bellinger /* 3790c66ac9dbSNicholas Bellinger * SPEC_I_PT=1 is only valid for Service action: REGISTER 3791c66ac9dbSNicholas Bellinger */ 3792c66ac9dbSNicholas Bellinger if (spec_i_pt && ((cdb[1] & 0x1f) != PRO_REGISTER)) 3793c66ac9dbSNicholas Bellinger return PYX_TRANSPORT_INVALID_PARAMETER_LIST; 3794c66ac9dbSNicholas Bellinger /* 3795c66ac9dbSNicholas Bellinger * From spc4r17 section 6.14: 3796c66ac9dbSNicholas Bellinger * 3797c66ac9dbSNicholas Bellinger * If the SPEC_I_PT bit is set to zero, the service action is not 3798c66ac9dbSNicholas Bellinger * REGISTER AND MOVE, and the parameter list length is not 24, then 3799c66ac9dbSNicholas Bellinger * the command shall be terminated with CHECK CONDITION status, with 3800c66ac9dbSNicholas Bellinger * the sense key set to ILLEGAL REQUEST, and the additional sense 3801c66ac9dbSNicholas Bellinger * code set to PARAMETER LIST LENGTH ERROR. 3802c66ac9dbSNicholas Bellinger */ 3803c66ac9dbSNicholas Bellinger if (!(spec_i_pt) && ((cdb[1] & 0x1f) != PRO_REGISTER_AND_MOVE) && 3804c66ac9dbSNicholas Bellinger (cmd->data_length != 24)) { 380525985edcSLucas De Marchi printk(KERN_WARNING "SPC-PR: Received PR OUT illegal parameter" 3806c66ac9dbSNicholas Bellinger " list length: %u\n", cmd->data_length); 3807c66ac9dbSNicholas Bellinger return PYX_TRANSPORT_INVALID_PARAMETER_LIST; 3808c66ac9dbSNicholas Bellinger } 3809c66ac9dbSNicholas Bellinger /* 3810c66ac9dbSNicholas Bellinger * (core_scsi3_emulate_pro_* function parameters 3811c66ac9dbSNicholas Bellinger * are defined by spc4r17 Table 174: 3812c66ac9dbSNicholas Bellinger * PERSISTENT_RESERVE_OUT service actions and valid parameters. 3813c66ac9dbSNicholas Bellinger */ 3814c66ac9dbSNicholas Bellinger switch (sa) { 3815c66ac9dbSNicholas Bellinger case PRO_REGISTER: 3816c66ac9dbSNicholas Bellinger return core_scsi3_emulate_pro_register(cmd, 3817c66ac9dbSNicholas Bellinger res_key, sa_res_key, aptpl, all_tg_pt, spec_i_pt, 0); 3818c66ac9dbSNicholas Bellinger case PRO_RESERVE: 3819c66ac9dbSNicholas Bellinger return core_scsi3_emulate_pro_reserve(cmd, 3820c66ac9dbSNicholas Bellinger type, scope, res_key); 3821c66ac9dbSNicholas Bellinger case PRO_RELEASE: 3822c66ac9dbSNicholas Bellinger return core_scsi3_emulate_pro_release(cmd, 3823c66ac9dbSNicholas Bellinger type, scope, res_key); 3824c66ac9dbSNicholas Bellinger case PRO_CLEAR: 3825c66ac9dbSNicholas Bellinger return core_scsi3_emulate_pro_clear(cmd, res_key); 3826c66ac9dbSNicholas Bellinger case PRO_PREEMPT: 3827c66ac9dbSNicholas Bellinger return core_scsi3_emulate_pro_preempt(cmd, type, scope, 3828c66ac9dbSNicholas Bellinger res_key, sa_res_key, 0); 3829c66ac9dbSNicholas Bellinger case PRO_PREEMPT_AND_ABORT: 3830c66ac9dbSNicholas Bellinger return core_scsi3_emulate_pro_preempt(cmd, type, scope, 3831c66ac9dbSNicholas Bellinger res_key, sa_res_key, 1); 3832c66ac9dbSNicholas Bellinger case PRO_REGISTER_AND_IGNORE_EXISTING_KEY: 3833c66ac9dbSNicholas Bellinger return core_scsi3_emulate_pro_register(cmd, 3834c66ac9dbSNicholas Bellinger 0, sa_res_key, aptpl, all_tg_pt, spec_i_pt, 1); 3835c66ac9dbSNicholas Bellinger case PRO_REGISTER_AND_MOVE: 3836c66ac9dbSNicholas Bellinger return core_scsi3_emulate_pro_register_and_move(cmd, res_key, 3837c66ac9dbSNicholas Bellinger sa_res_key, aptpl, unreg); 3838c66ac9dbSNicholas Bellinger default: 3839c66ac9dbSNicholas Bellinger printk(KERN_ERR "Unknown PERSISTENT_RESERVE_OUT service" 3840c66ac9dbSNicholas Bellinger " action: 0x%02x\n", cdb[1] & 0x1f); 3841c66ac9dbSNicholas Bellinger return PYX_TRANSPORT_INVALID_CDB_FIELD; 3842c66ac9dbSNicholas Bellinger } 3843c66ac9dbSNicholas Bellinger 3844c66ac9dbSNicholas Bellinger return PYX_TRANSPORT_INVALID_CDB_FIELD; 3845c66ac9dbSNicholas Bellinger } 3846c66ac9dbSNicholas Bellinger 3847c66ac9dbSNicholas Bellinger /* 3848c66ac9dbSNicholas Bellinger * PERSISTENT_RESERVE_IN Service Action READ_KEYS 3849c66ac9dbSNicholas Bellinger * 3850c66ac9dbSNicholas Bellinger * See spc4r17 section 5.7.6.2 and section 6.13.2, Table 160 3851c66ac9dbSNicholas Bellinger */ 3852c66ac9dbSNicholas Bellinger static int core_scsi3_pri_read_keys(struct se_cmd *cmd) 3853c66ac9dbSNicholas Bellinger { 38545951146dSAndy Grover struct se_device *se_dev = cmd->se_dev; 3855e3d6f909SAndy Grover struct se_subsystem_dev *su_dev = se_dev->se_sub_dev; 3856c66ac9dbSNicholas Bellinger struct t10_pr_registration *pr_reg; 385705d1c7c0SAndy Grover unsigned char *buf; 3858c66ac9dbSNicholas Bellinger u32 add_len = 0, off = 8; 3859c66ac9dbSNicholas Bellinger 3860c66ac9dbSNicholas Bellinger if (cmd->data_length < 8) { 3861c66ac9dbSNicholas Bellinger printk(KERN_ERR "PRIN SA READ_KEYS SCSI Data Length: %u" 3862c66ac9dbSNicholas Bellinger " too small\n", cmd->data_length); 3863c66ac9dbSNicholas Bellinger return PYX_TRANSPORT_INVALID_CDB_FIELD; 3864c66ac9dbSNicholas Bellinger } 3865c66ac9dbSNicholas Bellinger 386605d1c7c0SAndy Grover buf = transport_kmap_first_data_page(cmd); 3867e3d6f909SAndy Grover buf[0] = ((su_dev->t10_pr.pr_generation >> 24) & 0xff); 3868e3d6f909SAndy Grover buf[1] = ((su_dev->t10_pr.pr_generation >> 16) & 0xff); 3869e3d6f909SAndy Grover buf[2] = ((su_dev->t10_pr.pr_generation >> 8) & 0xff); 3870e3d6f909SAndy Grover buf[3] = (su_dev->t10_pr.pr_generation & 0xff); 3871c66ac9dbSNicholas Bellinger 3872e3d6f909SAndy Grover spin_lock(&su_dev->t10_pr.registration_lock); 3873e3d6f909SAndy Grover list_for_each_entry(pr_reg, &su_dev->t10_pr.registration_list, 3874c66ac9dbSNicholas Bellinger pr_reg_list) { 3875c66ac9dbSNicholas Bellinger /* 3876c66ac9dbSNicholas Bellinger * Check for overflow of 8byte PRI READ_KEYS payload and 3877c66ac9dbSNicholas Bellinger * next reservation key list descriptor. 3878c66ac9dbSNicholas Bellinger */ 3879c66ac9dbSNicholas Bellinger if ((add_len + 8) > (cmd->data_length - 8)) 3880c66ac9dbSNicholas Bellinger break; 3881c66ac9dbSNicholas Bellinger 3882c66ac9dbSNicholas Bellinger buf[off++] = ((pr_reg->pr_res_key >> 56) & 0xff); 3883c66ac9dbSNicholas Bellinger buf[off++] = ((pr_reg->pr_res_key >> 48) & 0xff); 3884c66ac9dbSNicholas Bellinger buf[off++] = ((pr_reg->pr_res_key >> 40) & 0xff); 3885c66ac9dbSNicholas Bellinger buf[off++] = ((pr_reg->pr_res_key >> 32) & 0xff); 3886c66ac9dbSNicholas Bellinger buf[off++] = ((pr_reg->pr_res_key >> 24) & 0xff); 3887c66ac9dbSNicholas Bellinger buf[off++] = ((pr_reg->pr_res_key >> 16) & 0xff); 3888c66ac9dbSNicholas Bellinger buf[off++] = ((pr_reg->pr_res_key >> 8) & 0xff); 3889c66ac9dbSNicholas Bellinger buf[off++] = (pr_reg->pr_res_key & 0xff); 3890c66ac9dbSNicholas Bellinger 3891c66ac9dbSNicholas Bellinger add_len += 8; 3892c66ac9dbSNicholas Bellinger } 3893e3d6f909SAndy Grover spin_unlock(&su_dev->t10_pr.registration_lock); 3894c66ac9dbSNicholas Bellinger 3895c66ac9dbSNicholas Bellinger buf[4] = ((add_len >> 24) & 0xff); 3896c66ac9dbSNicholas Bellinger buf[5] = ((add_len >> 16) & 0xff); 3897c66ac9dbSNicholas Bellinger buf[6] = ((add_len >> 8) & 0xff); 3898c66ac9dbSNicholas Bellinger buf[7] = (add_len & 0xff); 3899c66ac9dbSNicholas Bellinger 390005d1c7c0SAndy Grover transport_kunmap_first_data_page(cmd); 390105d1c7c0SAndy Grover 3902c66ac9dbSNicholas Bellinger return 0; 3903c66ac9dbSNicholas Bellinger } 3904c66ac9dbSNicholas Bellinger 3905c66ac9dbSNicholas Bellinger /* 3906c66ac9dbSNicholas Bellinger * PERSISTENT_RESERVE_IN Service Action READ_RESERVATION 3907c66ac9dbSNicholas Bellinger * 3908c66ac9dbSNicholas Bellinger * See spc4r17 section 5.7.6.3 and section 6.13.3.2 Table 161 and 162 3909c66ac9dbSNicholas Bellinger */ 3910c66ac9dbSNicholas Bellinger static int core_scsi3_pri_read_reservation(struct se_cmd *cmd) 3911c66ac9dbSNicholas Bellinger { 39125951146dSAndy Grover struct se_device *se_dev = cmd->se_dev; 3913e3d6f909SAndy Grover struct se_subsystem_dev *su_dev = se_dev->se_sub_dev; 3914c66ac9dbSNicholas Bellinger struct t10_pr_registration *pr_reg; 391505d1c7c0SAndy Grover unsigned char *buf; 3916c66ac9dbSNicholas Bellinger u64 pr_res_key; 3917c66ac9dbSNicholas Bellinger u32 add_len = 16; /* Hardcoded to 16 when a reservation is held. */ 3918c66ac9dbSNicholas Bellinger 3919c66ac9dbSNicholas Bellinger if (cmd->data_length < 8) { 3920c66ac9dbSNicholas Bellinger printk(KERN_ERR "PRIN SA READ_RESERVATIONS SCSI Data Length: %u" 3921c66ac9dbSNicholas Bellinger " too small\n", cmd->data_length); 3922c66ac9dbSNicholas Bellinger return PYX_TRANSPORT_INVALID_CDB_FIELD; 3923c66ac9dbSNicholas Bellinger } 3924c66ac9dbSNicholas Bellinger 392505d1c7c0SAndy Grover buf = transport_kmap_first_data_page(cmd); 3926e3d6f909SAndy Grover buf[0] = ((su_dev->t10_pr.pr_generation >> 24) & 0xff); 3927e3d6f909SAndy Grover buf[1] = ((su_dev->t10_pr.pr_generation >> 16) & 0xff); 3928e3d6f909SAndy Grover buf[2] = ((su_dev->t10_pr.pr_generation >> 8) & 0xff); 3929e3d6f909SAndy Grover buf[3] = (su_dev->t10_pr.pr_generation & 0xff); 3930c66ac9dbSNicholas Bellinger 3931c66ac9dbSNicholas Bellinger spin_lock(&se_dev->dev_reservation_lock); 3932c66ac9dbSNicholas Bellinger pr_reg = se_dev->dev_pr_res_holder; 3933c66ac9dbSNicholas Bellinger if ((pr_reg)) { 3934c66ac9dbSNicholas Bellinger /* 3935c66ac9dbSNicholas Bellinger * Set the hardcoded Additional Length 3936c66ac9dbSNicholas Bellinger */ 3937c66ac9dbSNicholas Bellinger buf[4] = ((add_len >> 24) & 0xff); 3938c66ac9dbSNicholas Bellinger buf[5] = ((add_len >> 16) & 0xff); 3939c66ac9dbSNicholas Bellinger buf[6] = ((add_len >> 8) & 0xff); 3940c66ac9dbSNicholas Bellinger buf[7] = (add_len & 0xff); 3941c66ac9dbSNicholas Bellinger 394205d1c7c0SAndy Grover if (cmd->data_length < 22) 394305d1c7c0SAndy Grover goto err; 394405d1c7c0SAndy Grover 3945c66ac9dbSNicholas Bellinger /* 3946c66ac9dbSNicholas Bellinger * Set the Reservation key. 3947c66ac9dbSNicholas Bellinger * 3948c66ac9dbSNicholas Bellinger * From spc4r17, section 5.7.10: 3949c66ac9dbSNicholas Bellinger * A persistent reservation holder has its reservation key 3950c66ac9dbSNicholas Bellinger * returned in the parameter data from a PERSISTENT 3951c66ac9dbSNicholas Bellinger * RESERVE IN command with READ RESERVATION service action as 3952c66ac9dbSNicholas Bellinger * follows: 3953c66ac9dbSNicholas Bellinger * a) For a persistent reservation of the type Write Exclusive 3954c66ac9dbSNicholas Bellinger * - All Registrants or Exclusive Access All Regitrants, 3955c66ac9dbSNicholas Bellinger * the reservation key shall be set to zero; or 3956c66ac9dbSNicholas Bellinger * b) For all other persistent reservation types, the 3957c66ac9dbSNicholas Bellinger * reservation key shall be set to the registered 3958c66ac9dbSNicholas Bellinger * reservation key for the I_T nexus that holds the 3959c66ac9dbSNicholas Bellinger * persistent reservation. 3960c66ac9dbSNicholas Bellinger */ 3961c66ac9dbSNicholas Bellinger if ((pr_reg->pr_res_type == PR_TYPE_WRITE_EXCLUSIVE_ALLREG) || 3962c66ac9dbSNicholas Bellinger (pr_reg->pr_res_type == PR_TYPE_EXCLUSIVE_ACCESS_ALLREG)) 3963c66ac9dbSNicholas Bellinger pr_res_key = 0; 3964c66ac9dbSNicholas Bellinger else 3965c66ac9dbSNicholas Bellinger pr_res_key = pr_reg->pr_res_key; 3966c66ac9dbSNicholas Bellinger 3967c66ac9dbSNicholas Bellinger buf[8] = ((pr_res_key >> 56) & 0xff); 3968c66ac9dbSNicholas Bellinger buf[9] = ((pr_res_key >> 48) & 0xff); 3969c66ac9dbSNicholas Bellinger buf[10] = ((pr_res_key >> 40) & 0xff); 3970c66ac9dbSNicholas Bellinger buf[11] = ((pr_res_key >> 32) & 0xff); 3971c66ac9dbSNicholas Bellinger buf[12] = ((pr_res_key >> 24) & 0xff); 3972c66ac9dbSNicholas Bellinger buf[13] = ((pr_res_key >> 16) & 0xff); 3973c66ac9dbSNicholas Bellinger buf[14] = ((pr_res_key >> 8) & 0xff); 3974c66ac9dbSNicholas Bellinger buf[15] = (pr_res_key & 0xff); 3975c66ac9dbSNicholas Bellinger /* 3976c66ac9dbSNicholas Bellinger * Set the SCOPE and TYPE 3977c66ac9dbSNicholas Bellinger */ 3978c66ac9dbSNicholas Bellinger buf[21] = (pr_reg->pr_res_scope & 0xf0) | 3979c66ac9dbSNicholas Bellinger (pr_reg->pr_res_type & 0x0f); 3980c66ac9dbSNicholas Bellinger } 398105d1c7c0SAndy Grover 398205d1c7c0SAndy Grover err: 3983c66ac9dbSNicholas Bellinger spin_unlock(&se_dev->dev_reservation_lock); 398405d1c7c0SAndy Grover transport_kunmap_first_data_page(cmd); 3985c66ac9dbSNicholas Bellinger 3986c66ac9dbSNicholas Bellinger return 0; 3987c66ac9dbSNicholas Bellinger } 3988c66ac9dbSNicholas Bellinger 3989c66ac9dbSNicholas Bellinger /* 3990c66ac9dbSNicholas Bellinger * PERSISTENT_RESERVE_IN Service Action REPORT_CAPABILITIES 3991c66ac9dbSNicholas Bellinger * 3992c66ac9dbSNicholas Bellinger * See spc4r17 section 6.13.4 Table 165 3993c66ac9dbSNicholas Bellinger */ 3994c66ac9dbSNicholas Bellinger static int core_scsi3_pri_report_capabilities(struct se_cmd *cmd) 3995c66ac9dbSNicholas Bellinger { 39965951146dSAndy Grover struct se_device *dev = cmd->se_dev; 3997e3d6f909SAndy Grover struct t10_reservation *pr_tmpl = &dev->se_sub_dev->t10_pr; 399805d1c7c0SAndy Grover unsigned char *buf; 3999c66ac9dbSNicholas Bellinger u16 add_len = 8; /* Hardcoded to 8. */ 4000c66ac9dbSNicholas Bellinger 4001c66ac9dbSNicholas Bellinger if (cmd->data_length < 6) { 4002c66ac9dbSNicholas Bellinger printk(KERN_ERR "PRIN SA REPORT_CAPABILITIES SCSI Data Length:" 4003c66ac9dbSNicholas Bellinger " %u too small\n", cmd->data_length); 4004c66ac9dbSNicholas Bellinger return PYX_TRANSPORT_INVALID_CDB_FIELD; 4005c66ac9dbSNicholas Bellinger } 4006c66ac9dbSNicholas Bellinger 400705d1c7c0SAndy Grover buf = transport_kmap_first_data_page(cmd); 400805d1c7c0SAndy Grover 4009c66ac9dbSNicholas Bellinger buf[0] = ((add_len << 8) & 0xff); 4010c66ac9dbSNicholas Bellinger buf[1] = (add_len & 0xff); 4011c66ac9dbSNicholas Bellinger buf[2] |= 0x10; /* CRH: Compatible Reservation Hanlding bit. */ 4012c66ac9dbSNicholas Bellinger buf[2] |= 0x08; /* SIP_C: Specify Initiator Ports Capable bit */ 4013c66ac9dbSNicholas Bellinger buf[2] |= 0x04; /* ATP_C: All Target Ports Capable bit */ 4014c66ac9dbSNicholas Bellinger buf[2] |= 0x01; /* PTPL_C: Persistence across Target Power Loss bit */ 4015c66ac9dbSNicholas Bellinger /* 4016c66ac9dbSNicholas Bellinger * We are filling in the PERSISTENT RESERVATION TYPE MASK below, so 4017c66ac9dbSNicholas Bellinger * set the TMV: Task Mask Valid bit. 4018c66ac9dbSNicholas Bellinger */ 4019c66ac9dbSNicholas Bellinger buf[3] |= 0x80; 4020c66ac9dbSNicholas Bellinger /* 4021c66ac9dbSNicholas Bellinger * Change ALLOW COMMANDs to 0x20 or 0x40 later from Table 166 4022c66ac9dbSNicholas Bellinger */ 4023c66ac9dbSNicholas Bellinger buf[3] |= 0x10; /* ALLOW COMMANDs field 001b */ 4024c66ac9dbSNicholas Bellinger /* 4025c66ac9dbSNicholas Bellinger * PTPL_A: Persistence across Target Power Loss Active bit 4026c66ac9dbSNicholas Bellinger */ 4027c66ac9dbSNicholas Bellinger if (pr_tmpl->pr_aptpl_active) 4028c66ac9dbSNicholas Bellinger buf[3] |= 0x01; 4029c66ac9dbSNicholas Bellinger /* 4030c66ac9dbSNicholas Bellinger * Setup the PERSISTENT RESERVATION TYPE MASK from Table 167 4031c66ac9dbSNicholas Bellinger */ 4032c66ac9dbSNicholas Bellinger buf[4] |= 0x80; /* PR_TYPE_EXCLUSIVE_ACCESS_ALLREG */ 4033c66ac9dbSNicholas Bellinger buf[4] |= 0x40; /* PR_TYPE_EXCLUSIVE_ACCESS_REGONLY */ 4034c66ac9dbSNicholas Bellinger buf[4] |= 0x20; /* PR_TYPE_WRITE_EXCLUSIVE_REGONLY */ 4035c66ac9dbSNicholas Bellinger buf[4] |= 0x08; /* PR_TYPE_EXCLUSIVE_ACCESS */ 4036c66ac9dbSNicholas Bellinger buf[4] |= 0x02; /* PR_TYPE_WRITE_EXCLUSIVE */ 4037c66ac9dbSNicholas Bellinger buf[5] |= 0x01; /* PR_TYPE_EXCLUSIVE_ACCESS_ALLREG */ 4038c66ac9dbSNicholas Bellinger 403905d1c7c0SAndy Grover transport_kunmap_first_data_page(cmd); 404005d1c7c0SAndy Grover 4041c66ac9dbSNicholas Bellinger return 0; 4042c66ac9dbSNicholas Bellinger } 4043c66ac9dbSNicholas Bellinger 4044c66ac9dbSNicholas Bellinger /* 4045c66ac9dbSNicholas Bellinger * PERSISTENT_RESERVE_IN Service Action READ_FULL_STATUS 4046c66ac9dbSNicholas Bellinger * 4047c66ac9dbSNicholas Bellinger * See spc4r17 section 6.13.5 Table 168 and 169 4048c66ac9dbSNicholas Bellinger */ 4049c66ac9dbSNicholas Bellinger static int core_scsi3_pri_read_full_status(struct se_cmd *cmd) 4050c66ac9dbSNicholas Bellinger { 40515951146dSAndy Grover struct se_device *se_dev = cmd->se_dev; 4052c66ac9dbSNicholas Bellinger struct se_node_acl *se_nacl; 4053e3d6f909SAndy Grover struct se_subsystem_dev *su_dev = se_dev->se_sub_dev; 4054c66ac9dbSNicholas Bellinger struct se_portal_group *se_tpg; 4055c66ac9dbSNicholas Bellinger struct t10_pr_registration *pr_reg, *pr_reg_tmp; 4056e3d6f909SAndy Grover struct t10_reservation *pr_tmpl = &se_dev->se_sub_dev->t10_pr; 405705d1c7c0SAndy Grover unsigned char *buf; 4058c66ac9dbSNicholas Bellinger u32 add_desc_len = 0, add_len = 0, desc_len, exp_desc_len; 4059c66ac9dbSNicholas Bellinger u32 off = 8; /* off into first Full Status descriptor */ 4060c66ac9dbSNicholas Bellinger int format_code = 0; 4061c66ac9dbSNicholas Bellinger 4062c66ac9dbSNicholas Bellinger if (cmd->data_length < 8) { 4063c66ac9dbSNicholas Bellinger printk(KERN_ERR "PRIN SA READ_FULL_STATUS SCSI Data Length: %u" 4064c66ac9dbSNicholas Bellinger " too small\n", cmd->data_length); 4065c66ac9dbSNicholas Bellinger return PYX_TRANSPORT_INVALID_CDB_FIELD; 4066c66ac9dbSNicholas Bellinger } 4067c66ac9dbSNicholas Bellinger 406805d1c7c0SAndy Grover buf = transport_kmap_first_data_page(cmd); 406905d1c7c0SAndy Grover 4070e3d6f909SAndy Grover buf[0] = ((su_dev->t10_pr.pr_generation >> 24) & 0xff); 4071e3d6f909SAndy Grover buf[1] = ((su_dev->t10_pr.pr_generation >> 16) & 0xff); 4072e3d6f909SAndy Grover buf[2] = ((su_dev->t10_pr.pr_generation >> 8) & 0xff); 4073e3d6f909SAndy Grover buf[3] = (su_dev->t10_pr.pr_generation & 0xff); 4074c66ac9dbSNicholas Bellinger 4075c66ac9dbSNicholas Bellinger spin_lock(&pr_tmpl->registration_lock); 4076c66ac9dbSNicholas Bellinger list_for_each_entry_safe(pr_reg, pr_reg_tmp, 4077c66ac9dbSNicholas Bellinger &pr_tmpl->registration_list, pr_reg_list) { 4078c66ac9dbSNicholas Bellinger 4079c66ac9dbSNicholas Bellinger se_nacl = pr_reg->pr_reg_nacl; 4080c66ac9dbSNicholas Bellinger se_tpg = pr_reg->pr_reg_nacl->se_tpg; 4081c66ac9dbSNicholas Bellinger add_desc_len = 0; 4082c66ac9dbSNicholas Bellinger 4083c66ac9dbSNicholas Bellinger atomic_inc(&pr_reg->pr_res_holders); 4084c66ac9dbSNicholas Bellinger smp_mb__after_atomic_inc(); 4085c66ac9dbSNicholas Bellinger spin_unlock(&pr_tmpl->registration_lock); 4086c66ac9dbSNicholas Bellinger /* 4087c66ac9dbSNicholas Bellinger * Determine expected length of $FABRIC_MOD specific 4088c66ac9dbSNicholas Bellinger * TransportID full status descriptor.. 4089c66ac9dbSNicholas Bellinger */ 4090e3d6f909SAndy Grover exp_desc_len = se_tpg->se_tpg_tfo->tpg_get_pr_transport_id_len( 4091c66ac9dbSNicholas Bellinger se_tpg, se_nacl, pr_reg, &format_code); 4092c66ac9dbSNicholas Bellinger 4093c66ac9dbSNicholas Bellinger if ((exp_desc_len + add_len) > cmd->data_length) { 4094c66ac9dbSNicholas Bellinger printk(KERN_WARNING "SPC-3 PRIN READ_FULL_STATUS ran" 4095c66ac9dbSNicholas Bellinger " out of buffer: %d\n", cmd->data_length); 4096c66ac9dbSNicholas Bellinger spin_lock(&pr_tmpl->registration_lock); 4097c66ac9dbSNicholas Bellinger atomic_dec(&pr_reg->pr_res_holders); 4098c66ac9dbSNicholas Bellinger smp_mb__after_atomic_dec(); 4099c66ac9dbSNicholas Bellinger break; 4100c66ac9dbSNicholas Bellinger } 4101c66ac9dbSNicholas Bellinger /* 4102c66ac9dbSNicholas Bellinger * Set RESERVATION KEY 4103c66ac9dbSNicholas Bellinger */ 4104c66ac9dbSNicholas Bellinger buf[off++] = ((pr_reg->pr_res_key >> 56) & 0xff); 4105c66ac9dbSNicholas Bellinger buf[off++] = ((pr_reg->pr_res_key >> 48) & 0xff); 4106c66ac9dbSNicholas Bellinger buf[off++] = ((pr_reg->pr_res_key >> 40) & 0xff); 4107c66ac9dbSNicholas Bellinger buf[off++] = ((pr_reg->pr_res_key >> 32) & 0xff); 4108c66ac9dbSNicholas Bellinger buf[off++] = ((pr_reg->pr_res_key >> 24) & 0xff); 4109c66ac9dbSNicholas Bellinger buf[off++] = ((pr_reg->pr_res_key >> 16) & 0xff); 4110c66ac9dbSNicholas Bellinger buf[off++] = ((pr_reg->pr_res_key >> 8) & 0xff); 4111c66ac9dbSNicholas Bellinger buf[off++] = (pr_reg->pr_res_key & 0xff); 4112c66ac9dbSNicholas Bellinger off += 4; /* Skip Over Reserved area */ 4113c66ac9dbSNicholas Bellinger 4114c66ac9dbSNicholas Bellinger /* 4115c66ac9dbSNicholas Bellinger * Set ALL_TG_PT bit if PROUT SA REGISTER had this set. 4116c66ac9dbSNicholas Bellinger */ 4117c66ac9dbSNicholas Bellinger if (pr_reg->pr_reg_all_tg_pt) 4118c66ac9dbSNicholas Bellinger buf[off] = 0x02; 4119c66ac9dbSNicholas Bellinger /* 4120c66ac9dbSNicholas Bellinger * The struct se_lun pointer will be present for the 4121c66ac9dbSNicholas Bellinger * reservation holder for PR_HOLDER bit. 4122c66ac9dbSNicholas Bellinger * 4123c66ac9dbSNicholas Bellinger * Also, if this registration is the reservation 4124c66ac9dbSNicholas Bellinger * holder, fill in SCOPE and TYPE in the next byte. 4125c66ac9dbSNicholas Bellinger */ 4126c66ac9dbSNicholas Bellinger if (pr_reg->pr_res_holder) { 4127c66ac9dbSNicholas Bellinger buf[off++] |= 0x01; 4128c66ac9dbSNicholas Bellinger buf[off++] = (pr_reg->pr_res_scope & 0xf0) | 4129c66ac9dbSNicholas Bellinger (pr_reg->pr_res_type & 0x0f); 4130c66ac9dbSNicholas Bellinger } else 4131c66ac9dbSNicholas Bellinger off += 2; 4132c66ac9dbSNicholas Bellinger 4133c66ac9dbSNicholas Bellinger off += 4; /* Skip over reserved area */ 4134c66ac9dbSNicholas Bellinger /* 4135c66ac9dbSNicholas Bellinger * From spc4r17 6.3.15: 4136c66ac9dbSNicholas Bellinger * 4137c66ac9dbSNicholas Bellinger * If the ALL_TG_PT bit set to zero, the RELATIVE TARGET PORT 4138c66ac9dbSNicholas Bellinger * IDENTIFIER field contains the relative port identifier (see 4139c66ac9dbSNicholas Bellinger * 3.1.120) of the target port that is part of the I_T nexus 4140c66ac9dbSNicholas Bellinger * described by this full status descriptor. If the ALL_TG_PT 4141c66ac9dbSNicholas Bellinger * bit is set to one, the contents of the RELATIVE TARGET PORT 4142c66ac9dbSNicholas Bellinger * IDENTIFIER field are not defined by this standard. 4143c66ac9dbSNicholas Bellinger */ 4144c66ac9dbSNicholas Bellinger if (!(pr_reg->pr_reg_all_tg_pt)) { 4145c66ac9dbSNicholas Bellinger struct se_port *port = pr_reg->pr_reg_tg_pt_lun->lun_sep; 4146c66ac9dbSNicholas Bellinger 4147c66ac9dbSNicholas Bellinger buf[off++] = ((port->sep_rtpi >> 8) & 0xff); 4148c66ac9dbSNicholas Bellinger buf[off++] = (port->sep_rtpi & 0xff); 4149c66ac9dbSNicholas Bellinger } else 4150c66ac9dbSNicholas Bellinger off += 2; /* Skip over RELATIVE TARGET PORT IDENTIFER */ 4151c66ac9dbSNicholas Bellinger 4152c66ac9dbSNicholas Bellinger /* 4153c66ac9dbSNicholas Bellinger * Now, have the $FABRIC_MOD fill in the protocol identifier 4154c66ac9dbSNicholas Bellinger */ 4155e3d6f909SAndy Grover desc_len = se_tpg->se_tpg_tfo->tpg_get_pr_transport_id(se_tpg, 4156c66ac9dbSNicholas Bellinger se_nacl, pr_reg, &format_code, &buf[off+4]); 4157c66ac9dbSNicholas Bellinger 4158c66ac9dbSNicholas Bellinger spin_lock(&pr_tmpl->registration_lock); 4159c66ac9dbSNicholas Bellinger atomic_dec(&pr_reg->pr_res_holders); 4160c66ac9dbSNicholas Bellinger smp_mb__after_atomic_dec(); 4161c66ac9dbSNicholas Bellinger /* 4162c66ac9dbSNicholas Bellinger * Set the ADDITIONAL DESCRIPTOR LENGTH 4163c66ac9dbSNicholas Bellinger */ 4164c66ac9dbSNicholas Bellinger buf[off++] = ((desc_len >> 24) & 0xff); 4165c66ac9dbSNicholas Bellinger buf[off++] = ((desc_len >> 16) & 0xff); 4166c66ac9dbSNicholas Bellinger buf[off++] = ((desc_len >> 8) & 0xff); 4167c66ac9dbSNicholas Bellinger buf[off++] = (desc_len & 0xff); 4168c66ac9dbSNicholas Bellinger /* 4169c66ac9dbSNicholas Bellinger * Size of full desctipor header minus TransportID 4170c66ac9dbSNicholas Bellinger * containing $FABRIC_MOD specific) initiator device/port 4171c66ac9dbSNicholas Bellinger * WWN information. 4172c66ac9dbSNicholas Bellinger * 4173c66ac9dbSNicholas Bellinger * See spc4r17 Section 6.13.5 Table 169 4174c66ac9dbSNicholas Bellinger */ 4175c66ac9dbSNicholas Bellinger add_desc_len = (24 + desc_len); 4176c66ac9dbSNicholas Bellinger 4177c66ac9dbSNicholas Bellinger off += desc_len; 4178c66ac9dbSNicholas Bellinger add_len += add_desc_len; 4179c66ac9dbSNicholas Bellinger } 4180c66ac9dbSNicholas Bellinger spin_unlock(&pr_tmpl->registration_lock); 4181c66ac9dbSNicholas Bellinger /* 4182c66ac9dbSNicholas Bellinger * Set ADDITIONAL_LENGTH 4183c66ac9dbSNicholas Bellinger */ 4184c66ac9dbSNicholas Bellinger buf[4] = ((add_len >> 24) & 0xff); 4185c66ac9dbSNicholas Bellinger buf[5] = ((add_len >> 16) & 0xff); 4186c66ac9dbSNicholas Bellinger buf[6] = ((add_len >> 8) & 0xff); 4187c66ac9dbSNicholas Bellinger buf[7] = (add_len & 0xff); 4188c66ac9dbSNicholas Bellinger 418905d1c7c0SAndy Grover transport_kunmap_first_data_page(cmd); 419005d1c7c0SAndy Grover 4191c66ac9dbSNicholas Bellinger return 0; 4192c66ac9dbSNicholas Bellinger } 4193c66ac9dbSNicholas Bellinger 4194c66ac9dbSNicholas Bellinger static int core_scsi3_emulate_pr_in(struct se_cmd *cmd, unsigned char *cdb) 4195c66ac9dbSNicholas Bellinger { 4196c66ac9dbSNicholas Bellinger switch (cdb[1] & 0x1f) { 4197c66ac9dbSNicholas Bellinger case PRI_READ_KEYS: 4198c66ac9dbSNicholas Bellinger return core_scsi3_pri_read_keys(cmd); 4199c66ac9dbSNicholas Bellinger case PRI_READ_RESERVATION: 4200c66ac9dbSNicholas Bellinger return core_scsi3_pri_read_reservation(cmd); 4201c66ac9dbSNicholas Bellinger case PRI_REPORT_CAPABILITIES: 4202c66ac9dbSNicholas Bellinger return core_scsi3_pri_report_capabilities(cmd); 4203c66ac9dbSNicholas Bellinger case PRI_READ_FULL_STATUS: 4204c66ac9dbSNicholas Bellinger return core_scsi3_pri_read_full_status(cmd); 4205c66ac9dbSNicholas Bellinger default: 4206c66ac9dbSNicholas Bellinger printk(KERN_ERR "Unknown PERSISTENT_RESERVE_IN service" 4207c66ac9dbSNicholas Bellinger " action: 0x%02x\n", cdb[1] & 0x1f); 4208c66ac9dbSNicholas Bellinger return PYX_TRANSPORT_INVALID_CDB_FIELD; 4209c66ac9dbSNicholas Bellinger } 4210c66ac9dbSNicholas Bellinger 4211c66ac9dbSNicholas Bellinger } 4212c66ac9dbSNicholas Bellinger 4213c66ac9dbSNicholas Bellinger int core_scsi3_emulate_pr(struct se_cmd *cmd) 4214c66ac9dbSNicholas Bellinger { 4215a1d8b49aSAndy Grover unsigned char *cdb = &cmd->t_task_cdb[0]; 4216c66ac9dbSNicholas Bellinger struct se_device *dev = cmd->se_dev; 4217c66ac9dbSNicholas Bellinger /* 4218c66ac9dbSNicholas Bellinger * Following spc2r20 5.5.1 Reservations overview: 4219c66ac9dbSNicholas Bellinger * 4220c66ac9dbSNicholas Bellinger * If a logical unit has been reserved by any RESERVE command and is 4221c66ac9dbSNicholas Bellinger * still reserved by any initiator, all PERSISTENT RESERVE IN and all 4222c66ac9dbSNicholas Bellinger * PERSISTENT RESERVE OUT commands shall conflict regardless of 4223c66ac9dbSNicholas Bellinger * initiator or service action and shall terminate with a RESERVATION 4224c66ac9dbSNicholas Bellinger * CONFLICT status. 4225c66ac9dbSNicholas Bellinger */ 4226c66ac9dbSNicholas Bellinger if (dev->dev_flags & DF_SPC2_RESERVATIONS) { 4227c66ac9dbSNicholas Bellinger printk(KERN_ERR "Received PERSISTENT_RESERVE CDB while legacy" 4228c66ac9dbSNicholas Bellinger " SPC-2 reservation is held, returning" 4229c66ac9dbSNicholas Bellinger " RESERVATION_CONFLICT\n"); 4230c66ac9dbSNicholas Bellinger return PYX_TRANSPORT_RESERVATION_CONFLICT; 4231c66ac9dbSNicholas Bellinger } 4232c66ac9dbSNicholas Bellinger 4233c66ac9dbSNicholas Bellinger return (cdb[0] == PERSISTENT_RESERVE_OUT) ? 4234c66ac9dbSNicholas Bellinger core_scsi3_emulate_pr_out(cmd, cdb) : 4235c66ac9dbSNicholas Bellinger core_scsi3_emulate_pr_in(cmd, cdb); 4236c66ac9dbSNicholas Bellinger } 4237c66ac9dbSNicholas Bellinger 4238c66ac9dbSNicholas Bellinger static int core_pt_reservation_check(struct se_cmd *cmd, u32 *pr_res_type) 4239c66ac9dbSNicholas Bellinger { 4240c66ac9dbSNicholas Bellinger return 0; 4241c66ac9dbSNicholas Bellinger } 4242c66ac9dbSNicholas Bellinger 4243c66ac9dbSNicholas Bellinger static int core_pt_seq_non_holder( 4244c66ac9dbSNicholas Bellinger struct se_cmd *cmd, 4245c66ac9dbSNicholas Bellinger unsigned char *cdb, 4246c66ac9dbSNicholas Bellinger u32 pr_reg_type) 4247c66ac9dbSNicholas Bellinger { 4248c66ac9dbSNicholas Bellinger return 0; 4249c66ac9dbSNicholas Bellinger } 4250c66ac9dbSNicholas Bellinger 4251c66ac9dbSNicholas Bellinger int core_setup_reservations(struct se_device *dev, int force_pt) 4252c66ac9dbSNicholas Bellinger { 4253c66ac9dbSNicholas Bellinger struct se_subsystem_dev *su_dev = dev->se_sub_dev; 4254e3d6f909SAndy Grover struct t10_reservation *rest = &su_dev->t10_pr; 4255c66ac9dbSNicholas Bellinger /* 4256c66ac9dbSNicholas Bellinger * If this device is from Target_Core_Mod/pSCSI, use the reservations 4257c66ac9dbSNicholas Bellinger * of the Underlying SCSI hardware. In Linux/SCSI terms, this can 4258c66ac9dbSNicholas Bellinger * cause a problem because libata and some SATA RAID HBAs appear 4259c66ac9dbSNicholas Bellinger * under Linux/SCSI, but to emulate reservations themselves. 4260c66ac9dbSNicholas Bellinger */ 4261e3d6f909SAndy Grover if (((dev->transport->transport_type == TRANSPORT_PLUGIN_PHBA_PDEV) && 4262e3d6f909SAndy Grover !(dev->se_sub_dev->se_dev_attrib.emulate_reservations)) || force_pt) { 4263c66ac9dbSNicholas Bellinger rest->res_type = SPC_PASSTHROUGH; 4264c66ac9dbSNicholas Bellinger rest->pr_ops.t10_reservation_check = &core_pt_reservation_check; 4265c66ac9dbSNicholas Bellinger rest->pr_ops.t10_seq_non_holder = &core_pt_seq_non_holder; 4266c66ac9dbSNicholas Bellinger printk(KERN_INFO "%s: Using SPC_PASSTHROUGH, no reservation" 4267e3d6f909SAndy Grover " emulation\n", dev->transport->name); 4268c66ac9dbSNicholas Bellinger return 0; 4269c66ac9dbSNicholas Bellinger } 4270c66ac9dbSNicholas Bellinger /* 4271c66ac9dbSNicholas Bellinger * If SPC-3 or above is reported by real or emulated struct se_device, 4272c66ac9dbSNicholas Bellinger * use emulated Persistent Reservations. 4273c66ac9dbSNicholas Bellinger */ 4274e3d6f909SAndy Grover if (dev->transport->get_device_rev(dev) >= SCSI_3) { 4275c66ac9dbSNicholas Bellinger rest->res_type = SPC3_PERSISTENT_RESERVATIONS; 4276c66ac9dbSNicholas Bellinger rest->pr_ops.t10_reservation_check = &core_scsi3_pr_reservation_check; 4277c66ac9dbSNicholas Bellinger rest->pr_ops.t10_seq_non_holder = &core_scsi3_pr_seq_non_holder; 4278c66ac9dbSNicholas Bellinger printk(KERN_INFO "%s: Using SPC3_PERSISTENT_RESERVATIONS" 4279e3d6f909SAndy Grover " emulation\n", dev->transport->name); 4280c66ac9dbSNicholas Bellinger } else { 4281c66ac9dbSNicholas Bellinger rest->res_type = SPC2_RESERVATIONS; 4282c66ac9dbSNicholas Bellinger rest->pr_ops.t10_reservation_check = &core_scsi2_reservation_check; 4283c66ac9dbSNicholas Bellinger rest->pr_ops.t10_seq_non_holder = 4284c66ac9dbSNicholas Bellinger &core_scsi2_reservation_seq_non_holder; 4285c66ac9dbSNicholas Bellinger printk(KERN_INFO "%s: Using SPC2_RESERVATIONS emulation\n", 4286e3d6f909SAndy Grover dev->transport->name); 4287c66ac9dbSNicholas Bellinger } 4288c66ac9dbSNicholas Bellinger 4289c66ac9dbSNicholas Bellinger return 0; 4290c66ac9dbSNicholas Bellinger } 4291