Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 1 | /******************************************************************************* |
| 2 | * Filename: target_core_pr.c |
| 3 | * |
| 4 | * This file contains SPC-3 compliant persistent reservations and |
| 5 | * legacy SPC-2 reservations with compatible reservation handling (CRH=1) |
| 6 | * |
Nicholas Bellinger | fd9a11d | 2012-11-09 14:51:48 -0800 | [diff] [blame] | 7 | * (c) Copyright 2009-2012 RisingTide Systems LLC. |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 8 | * |
| 9 | * Nicholas A. Bellinger <nab@kernel.org> |
| 10 | * |
| 11 | * This program is free software; you can redistribute it and/or modify |
| 12 | * it under the terms of the GNU General Public License as published by |
| 13 | * the Free Software Foundation; either version 2 of the License, or |
| 14 | * (at your option) any later version. |
| 15 | * |
| 16 | * This program is distributed in the hope that it will be useful, |
| 17 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 18 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 19 | * GNU General Public License for more details. |
| 20 | * |
| 21 | * You should have received a copy of the GNU General Public License |
| 22 | * along with this program; if not, write to the Free Software |
| 23 | * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. |
| 24 | * |
| 25 | ******************************************************************************/ |
| 26 | |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 27 | #include <linux/slab.h> |
| 28 | #include <linux/spinlock.h> |
| 29 | #include <linux/list.h> |
Al Viro | 0e9b10a | 2013-02-23 15:22:43 -0500 | [diff] [blame] | 30 | #include <linux/file.h> |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 31 | #include <scsi/scsi.h> |
| 32 | #include <scsi/scsi_cmnd.h> |
| 33 | #include <asm/unaligned.h> |
| 34 | |
| 35 | #include <target/target_core_base.h> |
Christoph Hellwig | c4795fb | 2011-11-16 09:46:48 -0500 | [diff] [blame] | 36 | #include <target/target_core_backend.h> |
| 37 | #include <target/target_core_fabric.h> |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 38 | #include <target/target_core_configfs.h> |
| 39 | |
Christoph Hellwig | e26d99a | 2011-11-14 12:30:30 -0500 | [diff] [blame] | 40 | #include "target_core_internal.h" |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 41 | #include "target_core_pr.h" |
| 42 | #include "target_core_ua.h" |
| 43 | |
| 44 | /* |
| 45 | * Used for Specify Initiator Ports Capable Bit (SPEC_I_PT) |
| 46 | */ |
| 47 | struct pr_transport_id_holder { |
| 48 | int dest_local_nexus; |
| 49 | struct t10_pr_registration *dest_pr_reg; |
| 50 | struct se_portal_group *dest_tpg; |
| 51 | struct se_node_acl *dest_node_acl; |
| 52 | struct se_dev_entry *dest_se_deve; |
| 53 | struct list_head dest_list; |
| 54 | }; |
| 55 | |
Andy Grover | d2843c1 | 2013-05-16 10:40:55 -0700 | [diff] [blame] | 56 | void core_pr_dump_initiator_port( |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 57 | struct t10_pr_registration *pr_reg, |
| 58 | char *buf, |
| 59 | u32 size) |
| 60 | { |
Andy Grover | 6708bb2 | 2011-06-08 10:36:43 -0700 | [diff] [blame] | 61 | if (!pr_reg->isid_present_at_reg) |
Andy Grover | d2843c1 | 2013-05-16 10:40:55 -0700 | [diff] [blame] | 62 | buf[0] = '\0'; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 63 | |
Andy Grover | d2843c1 | 2013-05-16 10:40:55 -0700 | [diff] [blame] | 64 | snprintf(buf, size, ",i,0x%s", pr_reg->pr_reg_isid); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 65 | } |
| 66 | |
Andy Grover | 33ce6a8 | 2013-05-16 10:40:54 -0700 | [diff] [blame] | 67 | enum register_type { |
| 68 | REGISTER, |
| 69 | REGISTER_AND_IGNORE_EXISTING_KEY, |
| 70 | REGISTER_AND_MOVE, |
| 71 | }; |
| 72 | |
| 73 | enum preempt_type { |
| 74 | PREEMPT, |
| 75 | PREEMPT_AND_ABORT, |
| 76 | }; |
| 77 | |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 78 | static void __core_scsi3_complete_pro_release(struct se_device *, struct se_node_acl *, |
| 79 | struct t10_pr_registration *, int); |
| 80 | |
Christoph Hellwig | de103c9 | 2012-11-06 12:24:09 -0800 | [diff] [blame] | 81 | static sense_reason_t |
| 82 | target_scsi2_reservation_check(struct se_cmd *cmd) |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 83 | { |
Christoph Hellwig | d977f43 | 2012-10-10 17:37:15 -0400 | [diff] [blame] | 84 | struct se_device *dev = cmd->se_dev; |
| 85 | struct se_session *sess = cmd->se_sess; |
| 86 | |
| 87 | switch (cmd->t_task_cdb[0]) { |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 88 | case INQUIRY: |
| 89 | case RELEASE: |
| 90 | case RELEASE_10: |
| 91 | return 0; |
| 92 | default: |
Christoph Hellwig | d977f43 | 2012-10-10 17:37:15 -0400 | [diff] [blame] | 93 | break; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 94 | } |
| 95 | |
Christoph Hellwig | d977f43 | 2012-10-10 17:37:15 -0400 | [diff] [blame] | 96 | if (!dev->dev_reserved_node_acl || !sess) |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 97 | return 0; |
| 98 | |
Christoph Hellwig | d977f43 | 2012-10-10 17:37:15 -0400 | [diff] [blame] | 99 | if (dev->dev_reserved_node_acl != sess->se_node_acl) |
Christoph Hellwig | de103c9 | 2012-11-06 12:24:09 -0800 | [diff] [blame] | 100 | return TCM_RESERVATION_CONFLICT; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 101 | |
Christoph Hellwig | d977f43 | 2012-10-10 17:37:15 -0400 | [diff] [blame] | 102 | if (dev->dev_reservation_flags & DRF_SPC2_RESERVATIONS_WITH_ISID) { |
| 103 | if (dev->dev_res_bin_isid != sess->sess_bin_isid) |
Christoph Hellwig | de103c9 | 2012-11-06 12:24:09 -0800 | [diff] [blame] | 104 | return TCM_RESERVATION_CONFLICT; |
Christoph Hellwig | d977f43 | 2012-10-10 17:37:15 -0400 | [diff] [blame] | 105 | } |
| 106 | |
| 107 | return 0; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 108 | } |
| 109 | |
Christoph Hellwig | eacac00 | 2011-11-03 17:50:40 -0400 | [diff] [blame] | 110 | static struct t10_pr_registration *core_scsi3_locate_pr_reg(struct se_device *, |
| 111 | struct se_node_acl *, struct se_session *); |
| 112 | static void core_scsi3_put_pr_reg(struct t10_pr_registration *); |
| 113 | |
Nicholas Bellinger | 087a03b | 2012-03-13 21:29:06 -0700 | [diff] [blame] | 114 | static int target_check_scsi2_reservation_conflict(struct se_cmd *cmd) |
Christoph Hellwig | eacac00 | 2011-11-03 17:50:40 -0400 | [diff] [blame] | 115 | { |
| 116 | struct se_session *se_sess = cmd->se_sess; |
Christoph Hellwig | 0fd97cc | 2012-10-08 00:03:19 -0400 | [diff] [blame] | 117 | struct se_device *dev = cmd->se_dev; |
Christoph Hellwig | eacac00 | 2011-11-03 17:50:40 -0400 | [diff] [blame] | 118 | struct t10_pr_registration *pr_reg; |
Christoph Hellwig | 0fd97cc | 2012-10-08 00:03:19 -0400 | [diff] [blame] | 119 | struct t10_reservation *pr_tmpl = &dev->t10_pr; |
Christoph Hellwig | eacac00 | 2011-11-03 17:50:40 -0400 | [diff] [blame] | 120 | int conflict = 0; |
| 121 | |
Christoph Hellwig | eacac00 | 2011-11-03 17:50:40 -0400 | [diff] [blame] | 122 | pr_reg = core_scsi3_locate_pr_reg(cmd->se_dev, se_sess->se_node_acl, |
| 123 | se_sess); |
| 124 | if (pr_reg) { |
| 125 | /* |
| 126 | * From spc4r17 5.7.3 Exceptions to SPC-2 RESERVE and RELEASE |
| 127 | * behavior |
| 128 | * |
| 129 | * A RESERVE(6) or RESERVE(10) command shall complete with GOOD |
| 130 | * status, but no reservation shall be established and the |
| 131 | * persistent reservation shall not be changed, if the command |
| 132 | * is received from a) and b) below. |
| 133 | * |
| 134 | * A RELEASE(6) or RELEASE(10) command shall complete with GOOD |
| 135 | * status, but the persistent reservation shall not be released, |
| 136 | * if the command is received from a) and b) |
| 137 | * |
| 138 | * a) An I_T nexus that is a persistent reservation holder; or |
| 139 | * b) An I_T nexus that is registered if a registrants only or |
| 140 | * all registrants type persistent reservation is present. |
| 141 | * |
| 142 | * In all other cases, a RESERVE(6) command, RESERVE(10) command, |
| 143 | * RELEASE(6) command, or RELEASE(10) command shall be processed |
| 144 | * as defined in SPC-2. |
| 145 | */ |
| 146 | if (pr_reg->pr_res_holder) { |
| 147 | core_scsi3_put_pr_reg(pr_reg); |
Nicholas Bellinger | 087a03b | 2012-03-13 21:29:06 -0700 | [diff] [blame] | 148 | return 1; |
Christoph Hellwig | eacac00 | 2011-11-03 17:50:40 -0400 | [diff] [blame] | 149 | } |
| 150 | if ((pr_reg->pr_res_type == PR_TYPE_WRITE_EXCLUSIVE_REGONLY) || |
| 151 | (pr_reg->pr_res_type == PR_TYPE_EXCLUSIVE_ACCESS_REGONLY) || |
| 152 | (pr_reg->pr_res_type == PR_TYPE_WRITE_EXCLUSIVE_ALLREG) || |
| 153 | (pr_reg->pr_res_type == PR_TYPE_EXCLUSIVE_ACCESS_ALLREG)) { |
| 154 | core_scsi3_put_pr_reg(pr_reg); |
Nicholas Bellinger | 087a03b | 2012-03-13 21:29:06 -0700 | [diff] [blame] | 155 | return 1; |
Christoph Hellwig | eacac00 | 2011-11-03 17:50:40 -0400 | [diff] [blame] | 156 | } |
| 157 | core_scsi3_put_pr_reg(pr_reg); |
| 158 | conflict = 1; |
| 159 | } else { |
| 160 | /* |
| 161 | * Following spc2r20 5.5.1 Reservations overview: |
| 162 | * |
| 163 | * If a logical unit has executed a PERSISTENT RESERVE OUT |
| 164 | * command with the REGISTER or the REGISTER AND IGNORE |
| 165 | * EXISTING KEY service action and is still registered by any |
| 166 | * initiator, all RESERVE commands and all RELEASE commands |
| 167 | * regardless of initiator shall conflict and shall terminate |
| 168 | * with a RESERVATION CONFLICT status. |
| 169 | */ |
| 170 | spin_lock(&pr_tmpl->registration_lock); |
| 171 | conflict = (list_empty(&pr_tmpl->registration_list)) ? 0 : 1; |
| 172 | spin_unlock(&pr_tmpl->registration_lock); |
| 173 | } |
| 174 | |
| 175 | if (conflict) { |
| 176 | pr_err("Received legacy SPC-2 RESERVE/RELEASE" |
| 177 | " while active SPC-3 registrations exist," |
| 178 | " returning RESERVATION_CONFLICT\n"); |
Nicholas Bellinger | 087a03b | 2012-03-13 21:29:06 -0700 | [diff] [blame] | 179 | return -EBUSY; |
Christoph Hellwig | eacac00 | 2011-11-03 17:50:40 -0400 | [diff] [blame] | 180 | } |
| 181 | |
Nicholas Bellinger | 087a03b | 2012-03-13 21:29:06 -0700 | [diff] [blame] | 182 | return 0; |
Christoph Hellwig | eacac00 | 2011-11-03 17:50:40 -0400 | [diff] [blame] | 183 | } |
| 184 | |
Christoph Hellwig | de103c9 | 2012-11-06 12:24:09 -0800 | [diff] [blame] | 185 | sense_reason_t |
| 186 | target_scsi2_reservation_release(struct se_cmd *cmd) |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 187 | { |
| 188 | struct se_device *dev = cmd->se_dev; |
| 189 | struct se_session *sess = cmd->se_sess; |
Wei Yongjun | 609234e | 2012-09-07 14:56:28 +0800 | [diff] [blame] | 190 | struct se_portal_group *tpg; |
Christoph Hellwig | de103c9 | 2012-11-06 12:24:09 -0800 | [diff] [blame] | 191 | int rc; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 192 | |
Wei Yongjun | 609234e | 2012-09-07 14:56:28 +0800 | [diff] [blame] | 193 | if (!sess || !sess->se_tpg) |
Christoph Hellwig | d29a5b6 | 2011-11-03 17:50:44 -0400 | [diff] [blame] | 194 | goto out; |
Nicholas Bellinger | 087a03b | 2012-03-13 21:29:06 -0700 | [diff] [blame] | 195 | rc = target_check_scsi2_reservation_conflict(cmd); |
| 196 | if (rc == 1) |
Christoph Hellwig | d29a5b6 | 2011-11-03 17:50:44 -0400 | [diff] [blame] | 197 | goto out; |
Christoph Hellwig | de103c9 | 2012-11-06 12:24:09 -0800 | [diff] [blame] | 198 | if (rc < 0) |
| 199 | return TCM_RESERVATION_CONFLICT; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 200 | |
| 201 | spin_lock(&dev->dev_reservation_lock); |
Christoph Hellwig | d29a5b6 | 2011-11-03 17:50:44 -0400 | [diff] [blame] | 202 | if (!dev->dev_reserved_node_acl || !sess) |
| 203 | goto out_unlock; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 204 | |
Christoph Hellwig | d29a5b6 | 2011-11-03 17:50:44 -0400 | [diff] [blame] | 205 | if (dev->dev_reserved_node_acl != sess->se_node_acl) |
| 206 | goto out_unlock; |
| 207 | |
Bernhard Kohl | edc318d | 2012-05-13 23:39:37 +0200 | [diff] [blame] | 208 | if (dev->dev_res_bin_isid != sess->sess_bin_isid) |
| 209 | goto out_unlock; |
| 210 | |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 211 | dev->dev_reserved_node_acl = NULL; |
Christoph Hellwig | 0fd97cc | 2012-10-08 00:03:19 -0400 | [diff] [blame] | 212 | dev->dev_reservation_flags &= ~DRF_SPC2_RESERVATIONS; |
| 213 | if (dev->dev_reservation_flags & DRF_SPC2_RESERVATIONS_WITH_ISID) { |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 214 | dev->dev_res_bin_isid = 0; |
Christoph Hellwig | 0fd97cc | 2012-10-08 00:03:19 -0400 | [diff] [blame] | 215 | dev->dev_reservation_flags &= ~DRF_SPC2_RESERVATIONS_WITH_ISID; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 216 | } |
Wei Yongjun | 609234e | 2012-09-07 14:56:28 +0800 | [diff] [blame] | 217 | tpg = sess->se_tpg; |
Andy Grover | 6708bb2 | 2011-06-08 10:36:43 -0700 | [diff] [blame] | 218 | pr_debug("SCSI-2 Released reservation for %s LUN: %u ->" |
Andy Grover | e3d6f90 | 2011-07-19 08:55:10 +0000 | [diff] [blame] | 219 | " MAPPED LUN: %u for %s\n", tpg->se_tpg_tfo->get_fabric_name(), |
| 220 | cmd->se_lun->unpacked_lun, cmd->se_deve->mapped_lun, |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 221 | sess->se_node_acl->initiatorname); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 222 | |
Christoph Hellwig | d29a5b6 | 2011-11-03 17:50:44 -0400 | [diff] [blame] | 223 | out_unlock: |
| 224 | spin_unlock(&dev->dev_reservation_lock); |
| 225 | out: |
Christoph Hellwig | de103c9 | 2012-11-06 12:24:09 -0800 | [diff] [blame] | 226 | target_complete_cmd(cmd, GOOD); |
| 227 | return 0; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 228 | } |
| 229 | |
Christoph Hellwig | de103c9 | 2012-11-06 12:24:09 -0800 | [diff] [blame] | 230 | sense_reason_t |
| 231 | target_scsi2_reservation_reserve(struct se_cmd *cmd) |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 232 | { |
| 233 | struct se_device *dev = cmd->se_dev; |
| 234 | struct se_session *sess = cmd->se_sess; |
Wei Yongjun | 609234e | 2012-09-07 14:56:28 +0800 | [diff] [blame] | 235 | struct se_portal_group *tpg; |
Christoph Hellwig | de103c9 | 2012-11-06 12:24:09 -0800 | [diff] [blame] | 236 | sense_reason_t ret = 0; |
| 237 | int rc; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 238 | |
Andy Grover | a1d8b49 | 2011-05-02 17:12:10 -0700 | [diff] [blame] | 239 | if ((cmd->t_task_cdb[1] & 0x01) && |
| 240 | (cmd->t_task_cdb[1] & 0x02)) { |
Andy Grover | 6708bb2 | 2011-06-08 10:36:43 -0700 | [diff] [blame] | 241 | pr_err("LongIO and Obselete Bits set, returning" |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 242 | " ILLEGAL_REQUEST\n"); |
Christoph Hellwig | de103c9 | 2012-11-06 12:24:09 -0800 | [diff] [blame] | 243 | return TCM_UNSUPPORTED_SCSI_OPCODE; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 244 | } |
| 245 | /* |
| 246 | * This is currently the case for target_core_mod passthrough struct se_cmd |
| 247 | * ops |
| 248 | */ |
Wei Yongjun | 609234e | 2012-09-07 14:56:28 +0800 | [diff] [blame] | 249 | if (!sess || !sess->se_tpg) |
Christoph Hellwig | d29a5b6 | 2011-11-03 17:50:44 -0400 | [diff] [blame] | 250 | goto out; |
Nicholas Bellinger | 087a03b | 2012-03-13 21:29:06 -0700 | [diff] [blame] | 251 | rc = target_check_scsi2_reservation_conflict(cmd); |
| 252 | if (rc == 1) |
Christoph Hellwig | d29a5b6 | 2011-11-03 17:50:44 -0400 | [diff] [blame] | 253 | goto out; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 254 | |
Christoph Hellwig | de103c9 | 2012-11-06 12:24:09 -0800 | [diff] [blame] | 255 | if (rc < 0) |
| 256 | return TCM_RESERVATION_CONFLICT; |
| 257 | |
Wei Yongjun | 609234e | 2012-09-07 14:56:28 +0800 | [diff] [blame] | 258 | tpg = sess->se_tpg; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 259 | spin_lock(&dev->dev_reservation_lock); |
| 260 | if (dev->dev_reserved_node_acl && |
| 261 | (dev->dev_reserved_node_acl != sess->se_node_acl)) { |
Andy Grover | 6708bb2 | 2011-06-08 10:36:43 -0700 | [diff] [blame] | 262 | pr_err("SCSI-2 RESERVATION CONFLIFT for %s fabric\n", |
Andy Grover | e3d6f90 | 2011-07-19 08:55:10 +0000 | [diff] [blame] | 263 | tpg->se_tpg_tfo->get_fabric_name()); |
Andy Grover | 6708bb2 | 2011-06-08 10:36:43 -0700 | [diff] [blame] | 264 | pr_err("Original reserver LUN: %u %s\n", |
Andy Grover | e3d6f90 | 2011-07-19 08:55:10 +0000 | [diff] [blame] | 265 | cmd->se_lun->unpacked_lun, |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 266 | dev->dev_reserved_node_acl->initiatorname); |
Andy Grover | 6708bb2 | 2011-06-08 10:36:43 -0700 | [diff] [blame] | 267 | pr_err("Current attempt - LUN: %u -> MAPPED LUN: %u" |
Andy Grover | e3d6f90 | 2011-07-19 08:55:10 +0000 | [diff] [blame] | 268 | " from %s \n", cmd->se_lun->unpacked_lun, |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 269 | cmd->se_deve->mapped_lun, |
| 270 | sess->se_node_acl->initiatorname); |
Christoph Hellwig | de103c9 | 2012-11-06 12:24:09 -0800 | [diff] [blame] | 271 | ret = TCM_RESERVATION_CONFLICT; |
Christoph Hellwig | d29a5b6 | 2011-11-03 17:50:44 -0400 | [diff] [blame] | 272 | goto out_unlock; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 273 | } |
| 274 | |
| 275 | dev->dev_reserved_node_acl = sess->se_node_acl; |
Christoph Hellwig | 0fd97cc | 2012-10-08 00:03:19 -0400 | [diff] [blame] | 276 | dev->dev_reservation_flags |= DRF_SPC2_RESERVATIONS; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 277 | if (sess->sess_bin_isid != 0) { |
| 278 | dev->dev_res_bin_isid = sess->sess_bin_isid; |
Christoph Hellwig | 0fd97cc | 2012-10-08 00:03:19 -0400 | [diff] [blame] | 279 | dev->dev_reservation_flags |= DRF_SPC2_RESERVATIONS_WITH_ISID; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 280 | } |
Andy Grover | 6708bb2 | 2011-06-08 10:36:43 -0700 | [diff] [blame] | 281 | pr_debug("SCSI-2 Reserved %s LUN: %u -> MAPPED LUN: %u" |
Andy Grover | e3d6f90 | 2011-07-19 08:55:10 +0000 | [diff] [blame] | 282 | " for %s\n", tpg->se_tpg_tfo->get_fabric_name(), |
| 283 | cmd->se_lun->unpacked_lun, cmd->se_deve->mapped_lun, |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 284 | sess->se_node_acl->initiatorname); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 285 | |
Christoph Hellwig | d29a5b6 | 2011-11-03 17:50:44 -0400 | [diff] [blame] | 286 | out_unlock: |
| 287 | spin_unlock(&dev->dev_reservation_lock); |
| 288 | out: |
Christoph Hellwig | 6bb35e0 | 2012-04-23 11:35:33 -0400 | [diff] [blame] | 289 | if (!ret) |
| 290 | target_complete_cmd(cmd, GOOD); |
Christoph Hellwig | d29a5b6 | 2011-11-03 17:50:44 -0400 | [diff] [blame] | 291 | return ret; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 292 | } |
| 293 | |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 294 | |
| 295 | /* |
| 296 | * Begin SPC-3/SPC-4 Persistent Reservations emulation support |
| 297 | * |
| 298 | * This function is called by those initiator ports who are *NOT* |
| 299 | * the active PR reservation holder when a reservation is present. |
| 300 | */ |
| 301 | static int core_scsi3_pr_seq_non_holder( |
| 302 | struct se_cmd *cmd, |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 303 | u32 pr_reg_type) |
| 304 | { |
Christoph Hellwig | d977f43 | 2012-10-10 17:37:15 -0400 | [diff] [blame] | 305 | unsigned char *cdb = cmd->t_task_cdb; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 306 | struct se_dev_entry *se_deve; |
Andy Grover | e3d6f90 | 2011-07-19 08:55:10 +0000 | [diff] [blame] | 307 | struct se_session *se_sess = cmd->se_sess; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 308 | int other_cdb = 0, ignore_reg; |
| 309 | int registered_nexus = 0, ret = 1; /* Conflict by default */ |
| 310 | int all_reg = 0, reg_only = 0; /* ALL_REG, REG_ONLY */ |
| 311 | int we = 0; /* Write Exclusive */ |
| 312 | int legacy = 0; /* Act like a legacy device and return |
| 313 | * RESERVATION CONFLICT on some CDBs */ |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 314 | |
Jörn Engel | f208324 | 2012-03-15 15:05:40 -0400 | [diff] [blame] | 315 | se_deve = se_sess->se_node_acl->device_list[cmd->orig_fe_lun]; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 316 | /* |
| 317 | * Determine if the registration should be ignored due to |
Christoph Hellwig | d977f43 | 2012-10-10 17:37:15 -0400 | [diff] [blame] | 318 | * non-matching ISIDs in target_scsi3_pr_reservation_check(). |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 319 | */ |
| 320 | ignore_reg = (pr_reg_type & 0x80000000); |
| 321 | if (ignore_reg) |
| 322 | pr_reg_type &= ~0x80000000; |
| 323 | |
| 324 | switch (pr_reg_type) { |
| 325 | case PR_TYPE_WRITE_EXCLUSIVE: |
| 326 | we = 1; |
| 327 | case PR_TYPE_EXCLUSIVE_ACCESS: |
| 328 | /* |
| 329 | * Some commands are only allowed for the persistent reservation |
| 330 | * holder. |
| 331 | */ |
| 332 | if ((se_deve->def_pr_registered) && !(ignore_reg)) |
| 333 | registered_nexus = 1; |
| 334 | break; |
| 335 | case PR_TYPE_WRITE_EXCLUSIVE_REGONLY: |
| 336 | we = 1; |
| 337 | case PR_TYPE_EXCLUSIVE_ACCESS_REGONLY: |
| 338 | /* |
| 339 | * Some commands are only allowed for registered I_T Nexuses. |
| 340 | */ |
| 341 | reg_only = 1; |
| 342 | if ((se_deve->def_pr_registered) && !(ignore_reg)) |
| 343 | registered_nexus = 1; |
| 344 | break; |
| 345 | case PR_TYPE_WRITE_EXCLUSIVE_ALLREG: |
| 346 | we = 1; |
| 347 | case PR_TYPE_EXCLUSIVE_ACCESS_ALLREG: |
| 348 | /* |
| 349 | * Each registered I_T Nexus is a reservation holder. |
| 350 | */ |
| 351 | all_reg = 1; |
| 352 | if ((se_deve->def_pr_registered) && !(ignore_reg)) |
| 353 | registered_nexus = 1; |
| 354 | break; |
| 355 | default: |
Andy Grover | e3d6f90 | 2011-07-19 08:55:10 +0000 | [diff] [blame] | 356 | return -EINVAL; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 357 | } |
| 358 | /* |
| 359 | * Referenced from spc4r17 table 45 for *NON* PR holder access |
| 360 | */ |
| 361 | switch (cdb[0]) { |
| 362 | case SECURITY_PROTOCOL_IN: |
| 363 | if (registered_nexus) |
| 364 | return 0; |
| 365 | ret = (we) ? 0 : 1; |
| 366 | break; |
| 367 | case MODE_SENSE: |
| 368 | case MODE_SENSE_10: |
| 369 | case READ_ATTRIBUTE: |
| 370 | case READ_BUFFER: |
| 371 | case RECEIVE_DIAGNOSTIC: |
| 372 | if (legacy) { |
| 373 | ret = 1; |
| 374 | break; |
| 375 | } |
| 376 | if (registered_nexus) { |
| 377 | ret = 0; |
| 378 | break; |
| 379 | } |
| 380 | ret = (we) ? 0 : 1; /* Allowed Write Exclusive */ |
| 381 | break; |
| 382 | case PERSISTENT_RESERVE_OUT: |
| 383 | /* |
| 384 | * This follows PERSISTENT_RESERVE_OUT service actions that |
| 385 | * are allowed in the presence of various reservations. |
| 386 | * See spc4r17, table 46 |
| 387 | */ |
| 388 | switch (cdb[1] & 0x1f) { |
| 389 | case PRO_CLEAR: |
| 390 | case PRO_PREEMPT: |
| 391 | case PRO_PREEMPT_AND_ABORT: |
| 392 | ret = (registered_nexus) ? 0 : 1; |
| 393 | break; |
| 394 | case PRO_REGISTER: |
| 395 | case PRO_REGISTER_AND_IGNORE_EXISTING_KEY: |
| 396 | ret = 0; |
| 397 | break; |
| 398 | case PRO_REGISTER_AND_MOVE: |
| 399 | case PRO_RESERVE: |
| 400 | ret = 1; |
| 401 | break; |
| 402 | case PRO_RELEASE: |
| 403 | ret = (registered_nexus) ? 0 : 1; |
| 404 | break; |
| 405 | default: |
Andy Grover | 6708bb2 | 2011-06-08 10:36:43 -0700 | [diff] [blame] | 406 | pr_err("Unknown PERSISTENT_RESERVE_OUT service" |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 407 | " action: 0x%02x\n", cdb[1] & 0x1f); |
Andy Grover | e3d6f90 | 2011-07-19 08:55:10 +0000 | [diff] [blame] | 408 | return -EINVAL; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 409 | } |
| 410 | break; |
| 411 | case RELEASE: |
| 412 | case RELEASE_10: |
Christoph Hellwig | eacac00 | 2011-11-03 17:50:40 -0400 | [diff] [blame] | 413 | /* Handled by CRH=1 in target_scsi2_reservation_release() */ |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 414 | ret = 0; |
| 415 | break; |
| 416 | case RESERVE: |
| 417 | case RESERVE_10: |
Christoph Hellwig | eacac00 | 2011-11-03 17:50:40 -0400 | [diff] [blame] | 418 | /* Handled by CRH=1 in target_scsi2_reservation_reserve() */ |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 419 | ret = 0; |
| 420 | break; |
| 421 | case TEST_UNIT_READY: |
| 422 | ret = (legacy) ? 1 : 0; /* Conflict for legacy */ |
| 423 | break; |
| 424 | case MAINTENANCE_IN: |
| 425 | switch (cdb[1] & 0x1f) { |
| 426 | case MI_MANAGEMENT_PROTOCOL_IN: |
| 427 | if (registered_nexus) { |
| 428 | ret = 0; |
| 429 | break; |
| 430 | } |
| 431 | ret = (we) ? 0 : 1; /* Allowed Write Exclusive */ |
| 432 | break; |
| 433 | case MI_REPORT_SUPPORTED_OPERATION_CODES: |
| 434 | case MI_REPORT_SUPPORTED_TASK_MANAGEMENT_FUNCTIONS: |
| 435 | if (legacy) { |
| 436 | ret = 1; |
| 437 | break; |
| 438 | } |
| 439 | if (registered_nexus) { |
| 440 | ret = 0; |
| 441 | break; |
| 442 | } |
| 443 | ret = (we) ? 0 : 1; /* Allowed Write Exclusive */ |
| 444 | break; |
| 445 | case MI_REPORT_ALIASES: |
| 446 | case MI_REPORT_IDENTIFYING_INFORMATION: |
| 447 | case MI_REPORT_PRIORITY: |
| 448 | case MI_REPORT_TARGET_PGS: |
| 449 | case MI_REPORT_TIMESTAMP: |
| 450 | ret = 0; /* Allowed */ |
| 451 | break; |
| 452 | default: |
Andy Grover | 6708bb2 | 2011-06-08 10:36:43 -0700 | [diff] [blame] | 453 | pr_err("Unknown MI Service Action: 0x%02x\n", |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 454 | (cdb[1] & 0x1f)); |
Andy Grover | e3d6f90 | 2011-07-19 08:55:10 +0000 | [diff] [blame] | 455 | return -EINVAL; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 456 | } |
| 457 | break; |
| 458 | case ACCESS_CONTROL_IN: |
| 459 | case ACCESS_CONTROL_OUT: |
| 460 | case INQUIRY: |
| 461 | case LOG_SENSE: |
| 462 | case READ_MEDIA_SERIAL_NUMBER: |
| 463 | case REPORT_LUNS: |
| 464 | case REQUEST_SENSE: |
Marco Sanvido | 6816966 | 2012-01-03 17:12:58 -0800 | [diff] [blame] | 465 | case PERSISTENT_RESERVE_IN: |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 466 | ret = 0; /*/ Allowed CDBs */ |
| 467 | break; |
| 468 | default: |
| 469 | other_cdb = 1; |
| 470 | break; |
| 471 | } |
| 472 | /* |
Lucas De Marchi | 25985ed | 2011-03-30 22:57:33 -0300 | [diff] [blame] | 473 | * Case where the CDB is explicitly allowed in the above switch |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 474 | * statement. |
| 475 | */ |
Andy Grover | 6708bb2 | 2011-06-08 10:36:43 -0700 | [diff] [blame] | 476 | if (!ret && !other_cdb) { |
Andy Grover | 6708bb2 | 2011-06-08 10:36:43 -0700 | [diff] [blame] | 477 | pr_debug("Allowing explict CDB: 0x%02x for %s" |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 478 | " reservation holder\n", cdb[0], |
| 479 | core_scsi3_pr_dump_type(pr_reg_type)); |
Andy Grover | 8b1e124 | 2012-04-03 15:51:12 -0700 | [diff] [blame] | 480 | |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 481 | return ret; |
| 482 | } |
| 483 | /* |
| 484 | * Check if write exclusive initiator ports *NOT* holding the |
| 485 | * WRITE_EXCLUSIVE_* reservation. |
| 486 | */ |
Andy Grover | ee1b1b9 | 2012-07-12 17:34:54 -0700 | [diff] [blame] | 487 | if (we && !registered_nexus) { |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 488 | if (cmd->data_direction == DMA_TO_DEVICE) { |
| 489 | /* |
| 490 | * Conflict for write exclusive |
| 491 | */ |
Andy Grover | 6708bb2 | 2011-06-08 10:36:43 -0700 | [diff] [blame] | 492 | pr_debug("%s Conflict for unregistered nexus" |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 493 | " %s CDB: 0x%02x to %s reservation\n", |
| 494 | transport_dump_cmd_direction(cmd), |
| 495 | se_sess->se_node_acl->initiatorname, cdb[0], |
| 496 | core_scsi3_pr_dump_type(pr_reg_type)); |
| 497 | return 1; |
| 498 | } else { |
| 499 | /* |
| 500 | * Allow non WRITE CDBs for all Write Exclusive |
| 501 | * PR TYPEs to pass for registered and |
| 502 | * non-registered_nexuxes NOT holding the reservation. |
| 503 | * |
| 504 | * We only make noise for the unregisterd nexuses, |
| 505 | * as we expect registered non-reservation holding |
| 506 | * nexuses to issue CDBs. |
| 507 | */ |
Andy Grover | 8b1e124 | 2012-04-03 15:51:12 -0700 | [diff] [blame] | 508 | |
Andy Grover | 6708bb2 | 2011-06-08 10:36:43 -0700 | [diff] [blame] | 509 | if (!registered_nexus) { |
| 510 | pr_debug("Allowing implict CDB: 0x%02x" |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 511 | " for %s reservation on unregistered" |
| 512 | " nexus\n", cdb[0], |
| 513 | core_scsi3_pr_dump_type(pr_reg_type)); |
| 514 | } |
Andy Grover | 8b1e124 | 2012-04-03 15:51:12 -0700 | [diff] [blame] | 515 | |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 516 | return 0; |
| 517 | } |
| 518 | } else if ((reg_only) || (all_reg)) { |
| 519 | if (registered_nexus) { |
| 520 | /* |
| 521 | * For PR_*_REG_ONLY and PR_*_ALL_REG reservations, |
| 522 | * allow commands from registered nexuses. |
| 523 | */ |
Andy Grover | 8b1e124 | 2012-04-03 15:51:12 -0700 | [diff] [blame] | 524 | |
Andy Grover | 6708bb2 | 2011-06-08 10:36:43 -0700 | [diff] [blame] | 525 | pr_debug("Allowing implict CDB: 0x%02x for %s" |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 526 | " reservation\n", cdb[0], |
| 527 | core_scsi3_pr_dump_type(pr_reg_type)); |
Andy Grover | 8b1e124 | 2012-04-03 15:51:12 -0700 | [diff] [blame] | 528 | |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 529 | return 0; |
| 530 | } |
| 531 | } |
Andy Grover | 6708bb2 | 2011-06-08 10:36:43 -0700 | [diff] [blame] | 532 | pr_debug("%s Conflict for %sregistered nexus %s CDB: 0x%2x" |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 533 | " for %s reservation\n", transport_dump_cmd_direction(cmd), |
| 534 | (registered_nexus) ? "" : "un", |
| 535 | se_sess->se_node_acl->initiatorname, cdb[0], |
| 536 | core_scsi3_pr_dump_type(pr_reg_type)); |
| 537 | |
| 538 | return 1; /* Conflict by default */ |
| 539 | } |
| 540 | |
Christoph Hellwig | de103c9 | 2012-11-06 12:24:09 -0800 | [diff] [blame] | 541 | static sense_reason_t |
| 542 | target_scsi3_pr_reservation_check(struct se_cmd *cmd) |
Christoph Hellwig | d977f43 | 2012-10-10 17:37:15 -0400 | [diff] [blame] | 543 | { |
| 544 | struct se_device *dev = cmd->se_dev; |
| 545 | struct se_session *sess = cmd->se_sess; |
| 546 | u32 pr_reg_type; |
| 547 | |
| 548 | if (!dev->dev_pr_res_holder) |
| 549 | return 0; |
| 550 | |
| 551 | pr_reg_type = dev->dev_pr_res_holder->pr_res_type; |
| 552 | cmd->pr_res_key = dev->dev_pr_res_holder->pr_res_key; |
| 553 | if (dev->dev_pr_res_holder->pr_reg_nacl != sess->se_node_acl) |
| 554 | goto check_nonholder; |
| 555 | |
| 556 | if (dev->dev_pr_res_holder->isid_present_at_reg) { |
| 557 | if (dev->dev_pr_res_holder->pr_reg_bin_isid != |
| 558 | sess->sess_bin_isid) { |
| 559 | pr_reg_type |= 0x80000000; |
| 560 | goto check_nonholder; |
| 561 | } |
| 562 | } |
| 563 | |
| 564 | return 0; |
| 565 | |
| 566 | check_nonholder: |
| 567 | if (core_scsi3_pr_seq_non_holder(cmd, pr_reg_type)) |
Christoph Hellwig | de103c9 | 2012-11-06 12:24:09 -0800 | [diff] [blame] | 568 | return TCM_RESERVATION_CONFLICT; |
Christoph Hellwig | d977f43 | 2012-10-10 17:37:15 -0400 | [diff] [blame] | 569 | return 0; |
| 570 | } |
| 571 | |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 572 | static u32 core_scsi3_pr_generation(struct se_device *dev) |
| 573 | { |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 574 | u32 prg; |
Christoph Hellwig | 0fd97cc | 2012-10-08 00:03:19 -0400 | [diff] [blame] | 575 | |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 576 | /* |
| 577 | * PRGeneration field shall contain the value of a 32-bit wrapping |
| 578 | * counter mainted by the device server. |
| 579 | * |
| 580 | * Note that this is done regardless of Active Persist across |
| 581 | * Target PowerLoss (APTPL) |
| 582 | * |
| 583 | * See spc4r17 section 6.3.12 READ_KEYS service action |
| 584 | */ |
| 585 | spin_lock(&dev->dev_reservation_lock); |
Christoph Hellwig | 0fd97cc | 2012-10-08 00:03:19 -0400 | [diff] [blame] | 586 | prg = dev->t10_pr.pr_generation++; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 587 | spin_unlock(&dev->dev_reservation_lock); |
| 588 | |
| 589 | return prg; |
| 590 | } |
| 591 | |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 592 | static struct t10_pr_registration *__core_scsi3_do_alloc_registration( |
| 593 | struct se_device *dev, |
| 594 | struct se_node_acl *nacl, |
| 595 | struct se_dev_entry *deve, |
| 596 | unsigned char *isid, |
| 597 | u64 sa_res_key, |
| 598 | int all_tg_pt, |
| 599 | int aptpl) |
| 600 | { |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 601 | struct t10_pr_registration *pr_reg; |
| 602 | |
| 603 | pr_reg = kmem_cache_zalloc(t10_pr_reg_cache, GFP_ATOMIC); |
Andy Grover | 6708bb2 | 2011-06-08 10:36:43 -0700 | [diff] [blame] | 604 | if (!pr_reg) { |
| 605 | pr_err("Unable to allocate struct t10_pr_registration\n"); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 606 | return NULL; |
| 607 | } |
| 608 | |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 609 | INIT_LIST_HEAD(&pr_reg->pr_reg_list); |
| 610 | INIT_LIST_HEAD(&pr_reg->pr_reg_abort_list); |
| 611 | INIT_LIST_HEAD(&pr_reg->pr_reg_aptpl_list); |
| 612 | INIT_LIST_HEAD(&pr_reg->pr_reg_atp_list); |
| 613 | INIT_LIST_HEAD(&pr_reg->pr_reg_atp_mem_list); |
| 614 | atomic_set(&pr_reg->pr_res_holders, 0); |
| 615 | pr_reg->pr_reg_nacl = nacl; |
| 616 | pr_reg->pr_reg_deve = deve; |
| 617 | pr_reg->pr_res_mapped_lun = deve->mapped_lun; |
| 618 | pr_reg->pr_aptpl_target_lun = deve->se_lun->unpacked_lun; |
| 619 | pr_reg->pr_res_key = sa_res_key; |
| 620 | pr_reg->pr_reg_all_tg_pt = all_tg_pt; |
| 621 | pr_reg->pr_reg_aptpl = aptpl; |
| 622 | pr_reg->pr_reg_tg_pt_lun = deve->se_lun; |
| 623 | /* |
| 624 | * If an ISID value for this SCSI Initiator Port exists, |
| 625 | * save it to the registration now. |
| 626 | */ |
| 627 | if (isid != NULL) { |
| 628 | pr_reg->pr_reg_bin_isid = get_unaligned_be64(isid); |
| 629 | snprintf(pr_reg->pr_reg_isid, PR_REG_ISID_LEN, "%s", isid); |
| 630 | pr_reg->isid_present_at_reg = 1; |
| 631 | } |
| 632 | |
| 633 | return pr_reg; |
| 634 | } |
| 635 | |
| 636 | static int core_scsi3_lunacl_depend_item(struct se_dev_entry *); |
| 637 | static void core_scsi3_lunacl_undepend_item(struct se_dev_entry *); |
| 638 | |
| 639 | /* |
| 640 | * Function used for handling PR registrations for ALL_TG_PT=1 and ALL_TG_PT=0 |
| 641 | * modes. |
| 642 | */ |
| 643 | static struct t10_pr_registration *__core_scsi3_alloc_registration( |
| 644 | struct se_device *dev, |
| 645 | struct se_node_acl *nacl, |
| 646 | struct se_dev_entry *deve, |
| 647 | unsigned char *isid, |
| 648 | u64 sa_res_key, |
| 649 | int all_tg_pt, |
| 650 | int aptpl) |
| 651 | { |
| 652 | struct se_dev_entry *deve_tmp; |
| 653 | struct se_node_acl *nacl_tmp; |
| 654 | struct se_port *port, *port_tmp; |
| 655 | struct target_core_fabric_ops *tfo = nacl->se_tpg->se_tpg_tfo; |
| 656 | struct t10_pr_registration *pr_reg, *pr_reg_atp, *pr_reg_tmp, *pr_reg_tmp_safe; |
| 657 | int ret; |
| 658 | /* |
| 659 | * Create a registration for the I_T Nexus upon which the |
| 660 | * PROUT REGISTER was received. |
| 661 | */ |
| 662 | pr_reg = __core_scsi3_do_alloc_registration(dev, nacl, deve, isid, |
| 663 | sa_res_key, all_tg_pt, aptpl); |
Andy Grover | 6708bb2 | 2011-06-08 10:36:43 -0700 | [diff] [blame] | 664 | if (!pr_reg) |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 665 | return NULL; |
| 666 | /* |
| 667 | * Return pointer to pr_reg for ALL_TG_PT=0 |
| 668 | */ |
Andy Grover | 6708bb2 | 2011-06-08 10:36:43 -0700 | [diff] [blame] | 669 | if (!all_tg_pt) |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 670 | return pr_reg; |
| 671 | /* |
| 672 | * Create list of matching SCSI Initiator Port registrations |
| 673 | * for ALL_TG_PT=1 |
| 674 | */ |
| 675 | spin_lock(&dev->se_port_lock); |
| 676 | list_for_each_entry_safe(port, port_tmp, &dev->dev_sep_list, sep_list) { |
| 677 | atomic_inc(&port->sep_tg_pt_ref_cnt); |
| 678 | smp_mb__after_atomic_inc(); |
| 679 | spin_unlock(&dev->se_port_lock); |
| 680 | |
| 681 | spin_lock_bh(&port->sep_alua_lock); |
| 682 | list_for_each_entry(deve_tmp, &port->sep_alua_list, |
| 683 | alua_port_list) { |
| 684 | /* |
| 685 | * This pointer will be NULL for demo mode MappedLUNs |
| 686 | * that have not been make explict via a ConfigFS |
| 687 | * MappedLUN group for the SCSI Initiator Node ACL. |
| 688 | */ |
Andy Grover | 6708bb2 | 2011-06-08 10:36:43 -0700 | [diff] [blame] | 689 | if (!deve_tmp->se_lun_acl) |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 690 | continue; |
| 691 | |
| 692 | nacl_tmp = deve_tmp->se_lun_acl->se_lun_nacl; |
| 693 | /* |
| 694 | * Skip the matching struct se_node_acl that is allocated |
| 695 | * above.. |
| 696 | */ |
| 697 | if (nacl == nacl_tmp) |
| 698 | continue; |
| 699 | /* |
| 700 | * Only perform PR registrations for target ports on |
| 701 | * the same fabric module as the REGISTER w/ ALL_TG_PT=1 |
| 702 | * arrived. |
| 703 | */ |
| 704 | if (tfo != nacl_tmp->se_tpg->se_tpg_tfo) |
| 705 | continue; |
| 706 | /* |
| 707 | * Look for a matching Initiator Node ACL in ASCII format |
| 708 | */ |
| 709 | if (strcmp(nacl->initiatorname, nacl_tmp->initiatorname)) |
| 710 | continue; |
| 711 | |
| 712 | atomic_inc(&deve_tmp->pr_ref_count); |
| 713 | smp_mb__after_atomic_inc(); |
| 714 | spin_unlock_bh(&port->sep_alua_lock); |
| 715 | /* |
| 716 | * Grab a configfs group dependency that is released |
| 717 | * for the exception path at label out: below, or upon |
| 718 | * completion of adding ALL_TG_PT=1 registrations in |
| 719 | * __core_scsi3_add_registration() |
| 720 | */ |
| 721 | ret = core_scsi3_lunacl_depend_item(deve_tmp); |
| 722 | if (ret < 0) { |
Andy Grover | 6708bb2 | 2011-06-08 10:36:43 -0700 | [diff] [blame] | 723 | pr_err("core_scsi3_lunacl_depend" |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 724 | "_item() failed\n"); |
| 725 | atomic_dec(&port->sep_tg_pt_ref_cnt); |
| 726 | smp_mb__after_atomic_dec(); |
| 727 | atomic_dec(&deve_tmp->pr_ref_count); |
| 728 | smp_mb__after_atomic_dec(); |
| 729 | goto out; |
| 730 | } |
| 731 | /* |
| 732 | * Located a matching SCSI Initiator Port on a different |
| 733 | * port, allocate the pr_reg_atp and attach it to the |
| 734 | * pr_reg->pr_reg_atp_list that will be processed once |
| 735 | * the original *pr_reg is processed in |
| 736 | * __core_scsi3_add_registration() |
| 737 | */ |
| 738 | pr_reg_atp = __core_scsi3_do_alloc_registration(dev, |
| 739 | nacl_tmp, deve_tmp, NULL, |
| 740 | sa_res_key, all_tg_pt, aptpl); |
Andy Grover | 6708bb2 | 2011-06-08 10:36:43 -0700 | [diff] [blame] | 741 | if (!pr_reg_atp) { |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 742 | atomic_dec(&port->sep_tg_pt_ref_cnt); |
| 743 | smp_mb__after_atomic_dec(); |
| 744 | atomic_dec(&deve_tmp->pr_ref_count); |
| 745 | smp_mb__after_atomic_dec(); |
| 746 | core_scsi3_lunacl_undepend_item(deve_tmp); |
| 747 | goto out; |
| 748 | } |
| 749 | |
| 750 | list_add_tail(&pr_reg_atp->pr_reg_atp_mem_list, |
| 751 | &pr_reg->pr_reg_atp_list); |
| 752 | spin_lock_bh(&port->sep_alua_lock); |
| 753 | } |
| 754 | spin_unlock_bh(&port->sep_alua_lock); |
| 755 | |
| 756 | spin_lock(&dev->se_port_lock); |
| 757 | atomic_dec(&port->sep_tg_pt_ref_cnt); |
| 758 | smp_mb__after_atomic_dec(); |
| 759 | } |
| 760 | spin_unlock(&dev->se_port_lock); |
| 761 | |
| 762 | return pr_reg; |
| 763 | out: |
| 764 | list_for_each_entry_safe(pr_reg_tmp, pr_reg_tmp_safe, |
| 765 | &pr_reg->pr_reg_atp_list, pr_reg_atp_mem_list) { |
| 766 | list_del(&pr_reg_tmp->pr_reg_atp_mem_list); |
| 767 | core_scsi3_lunacl_undepend_item(pr_reg_tmp->pr_reg_deve); |
| 768 | kmem_cache_free(t10_pr_reg_cache, pr_reg_tmp); |
| 769 | } |
| 770 | kmem_cache_free(t10_pr_reg_cache, pr_reg); |
| 771 | return NULL; |
| 772 | } |
| 773 | |
| 774 | int core_scsi3_alloc_aptpl_registration( |
Andy Grover | e3d6f90 | 2011-07-19 08:55:10 +0000 | [diff] [blame] | 775 | struct t10_reservation *pr_tmpl, |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 776 | u64 sa_res_key, |
| 777 | unsigned char *i_port, |
| 778 | unsigned char *isid, |
| 779 | u32 mapped_lun, |
| 780 | unsigned char *t_port, |
| 781 | u16 tpgt, |
| 782 | u32 target_lun, |
| 783 | int res_holder, |
| 784 | int all_tg_pt, |
| 785 | u8 type) |
| 786 | { |
| 787 | struct t10_pr_registration *pr_reg; |
| 788 | |
Andy Grover | 6708bb2 | 2011-06-08 10:36:43 -0700 | [diff] [blame] | 789 | if (!i_port || !t_port || !sa_res_key) { |
| 790 | pr_err("Illegal parameters for APTPL registration\n"); |
Andy Grover | e3d6f90 | 2011-07-19 08:55:10 +0000 | [diff] [blame] | 791 | return -EINVAL; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 792 | } |
| 793 | |
| 794 | pr_reg = kmem_cache_zalloc(t10_pr_reg_cache, GFP_KERNEL); |
Andy Grover | 6708bb2 | 2011-06-08 10:36:43 -0700 | [diff] [blame] | 795 | if (!pr_reg) { |
| 796 | pr_err("Unable to allocate struct t10_pr_registration\n"); |
Andy Grover | e3d6f90 | 2011-07-19 08:55:10 +0000 | [diff] [blame] | 797 | return -ENOMEM; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 798 | } |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 799 | |
| 800 | INIT_LIST_HEAD(&pr_reg->pr_reg_list); |
| 801 | INIT_LIST_HEAD(&pr_reg->pr_reg_abort_list); |
| 802 | INIT_LIST_HEAD(&pr_reg->pr_reg_aptpl_list); |
| 803 | INIT_LIST_HEAD(&pr_reg->pr_reg_atp_list); |
| 804 | INIT_LIST_HEAD(&pr_reg->pr_reg_atp_mem_list); |
| 805 | atomic_set(&pr_reg->pr_res_holders, 0); |
| 806 | pr_reg->pr_reg_nacl = NULL; |
| 807 | pr_reg->pr_reg_deve = NULL; |
| 808 | pr_reg->pr_res_mapped_lun = mapped_lun; |
| 809 | pr_reg->pr_aptpl_target_lun = target_lun; |
| 810 | pr_reg->pr_res_key = sa_res_key; |
| 811 | pr_reg->pr_reg_all_tg_pt = all_tg_pt; |
| 812 | pr_reg->pr_reg_aptpl = 1; |
| 813 | pr_reg->pr_reg_tg_pt_lun = NULL; |
| 814 | pr_reg->pr_res_scope = 0; /* Always LUN_SCOPE */ |
| 815 | pr_reg->pr_res_type = type; |
| 816 | /* |
| 817 | * If an ISID value had been saved in APTPL metadata for this |
| 818 | * SCSI Initiator Port, restore it now. |
| 819 | */ |
| 820 | if (isid != NULL) { |
| 821 | pr_reg->pr_reg_bin_isid = get_unaligned_be64(isid); |
| 822 | snprintf(pr_reg->pr_reg_isid, PR_REG_ISID_LEN, "%s", isid); |
| 823 | pr_reg->isid_present_at_reg = 1; |
| 824 | } |
| 825 | /* |
| 826 | * Copy the i_port and t_port information from caller. |
| 827 | */ |
| 828 | snprintf(pr_reg->pr_iport, PR_APTPL_MAX_IPORT_LEN, "%s", i_port); |
| 829 | snprintf(pr_reg->pr_tport, PR_APTPL_MAX_TPORT_LEN, "%s", t_port); |
| 830 | pr_reg->pr_reg_tpgt = tpgt; |
| 831 | /* |
| 832 | * Set pr_res_holder from caller, the pr_reg who is the reservation |
| 833 | * holder will get it's pointer set in core_scsi3_aptpl_reserve() once |
| 834 | * the Initiator Node LUN ACL from the fabric module is created for |
| 835 | * this registration. |
| 836 | */ |
| 837 | pr_reg->pr_res_holder = res_holder; |
| 838 | |
| 839 | list_add_tail(&pr_reg->pr_reg_aptpl_list, &pr_tmpl->aptpl_reg_list); |
Andy Grover | 6708bb2 | 2011-06-08 10:36:43 -0700 | [diff] [blame] | 840 | pr_debug("SPC-3 PR APTPL Successfully added registration%s from" |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 841 | " metadata\n", (res_holder) ? "+reservation" : ""); |
| 842 | return 0; |
| 843 | } |
| 844 | |
| 845 | static void core_scsi3_aptpl_reserve( |
| 846 | struct se_device *dev, |
| 847 | struct se_portal_group *tpg, |
| 848 | struct se_node_acl *node_acl, |
| 849 | struct t10_pr_registration *pr_reg) |
| 850 | { |
| 851 | char i_buf[PR_REG_ISID_ID_LEN]; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 852 | |
| 853 | memset(i_buf, 0, PR_REG_ISID_ID_LEN); |
Andy Grover | d2843c1 | 2013-05-16 10:40:55 -0700 | [diff] [blame] | 854 | core_pr_dump_initiator_port(pr_reg, i_buf, PR_REG_ISID_ID_LEN); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 855 | |
| 856 | spin_lock(&dev->dev_reservation_lock); |
| 857 | dev->dev_pr_res_holder = pr_reg; |
| 858 | spin_unlock(&dev->dev_reservation_lock); |
| 859 | |
Andy Grover | 6708bb2 | 2011-06-08 10:36:43 -0700 | [diff] [blame] | 860 | pr_debug("SPC-3 PR [%s] Service Action: APTPL RESERVE created" |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 861 | " new reservation holder TYPE: %s ALL_TG_PT: %d\n", |
Andy Grover | e3d6f90 | 2011-07-19 08:55:10 +0000 | [diff] [blame] | 862 | tpg->se_tpg_tfo->get_fabric_name(), |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 863 | core_scsi3_pr_dump_type(pr_reg->pr_res_type), |
| 864 | (pr_reg->pr_reg_all_tg_pt) ? 1 : 0); |
Andy Grover | 6708bb2 | 2011-06-08 10:36:43 -0700 | [diff] [blame] | 865 | pr_debug("SPC-3 PR [%s] RESERVE Node: %s%s\n", |
Andy Grover | e3d6f90 | 2011-07-19 08:55:10 +0000 | [diff] [blame] | 866 | tpg->se_tpg_tfo->get_fabric_name(), node_acl->initiatorname, |
Andy Grover | d2843c1 | 2013-05-16 10:40:55 -0700 | [diff] [blame] | 867 | i_buf); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 868 | } |
| 869 | |
| 870 | static void __core_scsi3_add_registration(struct se_device *, struct se_node_acl *, |
Andy Grover | 33ce6a8 | 2013-05-16 10:40:54 -0700 | [diff] [blame] | 871 | struct t10_pr_registration *, enum register_type, int); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 872 | |
| 873 | static int __core_scsi3_check_aptpl_registration( |
| 874 | struct se_device *dev, |
| 875 | struct se_portal_group *tpg, |
| 876 | struct se_lun *lun, |
| 877 | u32 target_lun, |
| 878 | struct se_node_acl *nacl, |
| 879 | struct se_dev_entry *deve) |
| 880 | { |
| 881 | struct t10_pr_registration *pr_reg, *pr_reg_tmp; |
Christoph Hellwig | 0fd97cc | 2012-10-08 00:03:19 -0400 | [diff] [blame] | 882 | struct t10_reservation *pr_tmpl = &dev->t10_pr; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 883 | unsigned char i_port[PR_APTPL_MAX_IPORT_LEN]; |
| 884 | unsigned char t_port[PR_APTPL_MAX_TPORT_LEN]; |
| 885 | u16 tpgt; |
| 886 | |
| 887 | memset(i_port, 0, PR_APTPL_MAX_IPORT_LEN); |
| 888 | memset(t_port, 0, PR_APTPL_MAX_TPORT_LEN); |
| 889 | /* |
| 890 | * Copy Initiator Port information from struct se_node_acl |
| 891 | */ |
| 892 | snprintf(i_port, PR_APTPL_MAX_IPORT_LEN, "%s", nacl->initiatorname); |
| 893 | snprintf(t_port, PR_APTPL_MAX_TPORT_LEN, "%s", |
Andy Grover | e3d6f90 | 2011-07-19 08:55:10 +0000 | [diff] [blame] | 894 | tpg->se_tpg_tfo->tpg_get_wwn(tpg)); |
| 895 | tpgt = tpg->se_tpg_tfo->tpg_get_tag(tpg); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 896 | /* |
| 897 | * Look for the matching registrations+reservation from those |
| 898 | * created from APTPL metadata. Note that multiple registrations |
| 899 | * may exist for fabrics that use ISIDs in their SCSI Initiator Port |
| 900 | * TransportIDs. |
| 901 | */ |
| 902 | spin_lock(&pr_tmpl->aptpl_reg_lock); |
| 903 | list_for_each_entry_safe(pr_reg, pr_reg_tmp, &pr_tmpl->aptpl_reg_list, |
| 904 | pr_reg_aptpl_list) { |
Andy Grover | 6708bb2 | 2011-06-08 10:36:43 -0700 | [diff] [blame] | 905 | if (!strcmp(pr_reg->pr_iport, i_port) && |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 906 | (pr_reg->pr_res_mapped_lun == deve->mapped_lun) && |
| 907 | !(strcmp(pr_reg->pr_tport, t_port)) && |
| 908 | (pr_reg->pr_reg_tpgt == tpgt) && |
| 909 | (pr_reg->pr_aptpl_target_lun == target_lun)) { |
| 910 | |
| 911 | pr_reg->pr_reg_nacl = nacl; |
| 912 | pr_reg->pr_reg_deve = deve; |
| 913 | pr_reg->pr_reg_tg_pt_lun = lun; |
| 914 | |
| 915 | list_del(&pr_reg->pr_reg_aptpl_list); |
| 916 | spin_unlock(&pr_tmpl->aptpl_reg_lock); |
| 917 | /* |
| 918 | * At this point all of the pointers in *pr_reg will |
| 919 | * be setup, so go ahead and add the registration. |
| 920 | */ |
| 921 | |
| 922 | __core_scsi3_add_registration(dev, nacl, pr_reg, 0, 0); |
| 923 | /* |
| 924 | * If this registration is the reservation holder, |
| 925 | * make that happen now.. |
| 926 | */ |
| 927 | if (pr_reg->pr_res_holder) |
| 928 | core_scsi3_aptpl_reserve(dev, tpg, |
| 929 | nacl, pr_reg); |
| 930 | /* |
| 931 | * Reenable pr_aptpl_active to accept new metadata |
| 932 | * updates once the SCSI device is active again.. |
| 933 | */ |
| 934 | spin_lock(&pr_tmpl->aptpl_reg_lock); |
| 935 | pr_tmpl->pr_aptpl_active = 1; |
| 936 | } |
| 937 | } |
| 938 | spin_unlock(&pr_tmpl->aptpl_reg_lock); |
| 939 | |
| 940 | return 0; |
| 941 | } |
| 942 | |
| 943 | int core_scsi3_check_aptpl_registration( |
| 944 | struct se_device *dev, |
| 945 | struct se_portal_group *tpg, |
| 946 | struct se_lun *lun, |
| 947 | struct se_lun_acl *lun_acl) |
| 948 | { |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 949 | struct se_node_acl *nacl = lun_acl->se_lun_nacl; |
Jörn Engel | f208324 | 2012-03-15 15:05:40 -0400 | [diff] [blame] | 950 | struct se_dev_entry *deve = nacl->device_list[lun_acl->mapped_lun]; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 951 | |
Christoph Hellwig | d977f43 | 2012-10-10 17:37:15 -0400 | [diff] [blame] | 952 | if (dev->dev_reservation_flags & DRF_SPC2_RESERVATIONS) |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 953 | return 0; |
| 954 | |
| 955 | return __core_scsi3_check_aptpl_registration(dev, tpg, lun, |
| 956 | lun->unpacked_lun, nacl, deve); |
| 957 | } |
| 958 | |
| 959 | static void __core_scsi3_dump_registration( |
| 960 | struct target_core_fabric_ops *tfo, |
| 961 | struct se_device *dev, |
| 962 | struct se_node_acl *nacl, |
| 963 | struct t10_pr_registration *pr_reg, |
Andy Grover | 33ce6a8 | 2013-05-16 10:40:54 -0700 | [diff] [blame] | 964 | enum register_type register_type) |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 965 | { |
| 966 | struct se_portal_group *se_tpg = nacl->se_tpg; |
| 967 | char i_buf[PR_REG_ISID_ID_LEN]; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 968 | |
| 969 | memset(&i_buf[0], 0, PR_REG_ISID_ID_LEN); |
Andy Grover | d2843c1 | 2013-05-16 10:40:55 -0700 | [diff] [blame] | 970 | core_pr_dump_initiator_port(pr_reg, i_buf, PR_REG_ISID_ID_LEN); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 971 | |
Andy Grover | 6708bb2 | 2011-06-08 10:36:43 -0700 | [diff] [blame] | 972 | pr_debug("SPC-3 PR [%s] Service Action: REGISTER%s Initiator" |
Andy Grover | 33ce6a8 | 2013-05-16 10:40:54 -0700 | [diff] [blame] | 973 | " Node: %s%s\n", tfo->get_fabric_name(), (register_type == REGISTER_AND_MOVE) ? |
| 974 | "_AND_MOVE" : (register_type == REGISTER_AND_IGNORE_EXISTING_KEY) ? |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 975 | "_AND_IGNORE_EXISTING_KEY" : "", nacl->initiatorname, |
Andy Grover | d2843c1 | 2013-05-16 10:40:55 -0700 | [diff] [blame] | 976 | i_buf); |
Andy Grover | 6708bb2 | 2011-06-08 10:36:43 -0700 | [diff] [blame] | 977 | pr_debug("SPC-3 PR [%s] registration on Target Port: %s,0x%04x\n", |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 978 | tfo->get_fabric_name(), tfo->tpg_get_wwn(se_tpg), |
| 979 | tfo->tpg_get_tag(se_tpg)); |
Andy Grover | 6708bb2 | 2011-06-08 10:36:43 -0700 | [diff] [blame] | 980 | pr_debug("SPC-3 PR [%s] for %s TCM Subsystem %s Object Target" |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 981 | " Port(s)\n", tfo->get_fabric_name(), |
| 982 | (pr_reg->pr_reg_all_tg_pt) ? "ALL" : "SINGLE", |
Andy Grover | e3d6f90 | 2011-07-19 08:55:10 +0000 | [diff] [blame] | 983 | dev->transport->name); |
Andy Grover | 6708bb2 | 2011-06-08 10:36:43 -0700 | [diff] [blame] | 984 | pr_debug("SPC-3 PR [%s] SA Res Key: 0x%016Lx PRgeneration:" |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 985 | " 0x%08x APTPL: %d\n", tfo->get_fabric_name(), |
| 986 | pr_reg->pr_res_key, pr_reg->pr_res_generation, |
| 987 | pr_reg->pr_reg_aptpl); |
| 988 | } |
| 989 | |
| 990 | /* |
| 991 | * this function can be called with struct se_device->dev_reservation_lock |
| 992 | * when register_move = 1 |
| 993 | */ |
| 994 | static void __core_scsi3_add_registration( |
| 995 | struct se_device *dev, |
| 996 | struct se_node_acl *nacl, |
| 997 | struct t10_pr_registration *pr_reg, |
Andy Grover | 33ce6a8 | 2013-05-16 10:40:54 -0700 | [diff] [blame] | 998 | enum register_type register_type, |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 999 | int register_move) |
| 1000 | { |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 1001 | struct target_core_fabric_ops *tfo = nacl->se_tpg->se_tpg_tfo; |
| 1002 | struct t10_pr_registration *pr_reg_tmp, *pr_reg_tmp_safe; |
Christoph Hellwig | 0fd97cc | 2012-10-08 00:03:19 -0400 | [diff] [blame] | 1003 | struct t10_reservation *pr_tmpl = &dev->t10_pr; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 1004 | |
| 1005 | /* |
| 1006 | * Increment PRgeneration counter for struct se_device upon a successful |
| 1007 | * REGISTER, see spc4r17 section 6.3.2 READ_KEYS service action |
| 1008 | * |
| 1009 | * Also, when register_move = 1 for PROUT REGISTER_AND_MOVE service |
| 1010 | * action, the struct se_device->dev_reservation_lock will already be held, |
| 1011 | * so we do not call core_scsi3_pr_generation() which grabs the lock |
| 1012 | * for the REGISTER. |
| 1013 | */ |
| 1014 | pr_reg->pr_res_generation = (register_move) ? |
Christoph Hellwig | 0fd97cc | 2012-10-08 00:03:19 -0400 | [diff] [blame] | 1015 | dev->t10_pr.pr_generation++ : |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 1016 | core_scsi3_pr_generation(dev); |
| 1017 | |
| 1018 | spin_lock(&pr_tmpl->registration_lock); |
| 1019 | list_add_tail(&pr_reg->pr_reg_list, &pr_tmpl->registration_list); |
| 1020 | pr_reg->pr_reg_deve->def_pr_registered = 1; |
| 1021 | |
| 1022 | __core_scsi3_dump_registration(tfo, dev, nacl, pr_reg, register_type); |
| 1023 | spin_unlock(&pr_tmpl->registration_lock); |
| 1024 | /* |
| 1025 | * Skip extra processing for ALL_TG_PT=0 or REGISTER_AND_MOVE. |
| 1026 | */ |
Andy Grover | 6708bb2 | 2011-06-08 10:36:43 -0700 | [diff] [blame] | 1027 | if (!pr_reg->pr_reg_all_tg_pt || register_move) |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 1028 | return; |
| 1029 | /* |
| 1030 | * Walk pr_reg->pr_reg_atp_list and add registrations for ALL_TG_PT=1 |
| 1031 | * allocated in __core_scsi3_alloc_registration() |
| 1032 | */ |
| 1033 | list_for_each_entry_safe(pr_reg_tmp, pr_reg_tmp_safe, |
| 1034 | &pr_reg->pr_reg_atp_list, pr_reg_atp_mem_list) { |
| 1035 | list_del(&pr_reg_tmp->pr_reg_atp_mem_list); |
| 1036 | |
| 1037 | pr_reg_tmp->pr_res_generation = core_scsi3_pr_generation(dev); |
| 1038 | |
| 1039 | spin_lock(&pr_tmpl->registration_lock); |
| 1040 | list_add_tail(&pr_reg_tmp->pr_reg_list, |
| 1041 | &pr_tmpl->registration_list); |
| 1042 | pr_reg_tmp->pr_reg_deve->def_pr_registered = 1; |
| 1043 | |
| 1044 | __core_scsi3_dump_registration(tfo, dev, |
| 1045 | pr_reg_tmp->pr_reg_nacl, pr_reg_tmp, |
| 1046 | register_type); |
| 1047 | spin_unlock(&pr_tmpl->registration_lock); |
| 1048 | /* |
| 1049 | * Drop configfs group dependency reference from |
| 1050 | * __core_scsi3_alloc_registration() |
| 1051 | */ |
| 1052 | core_scsi3_lunacl_undepend_item(pr_reg_tmp->pr_reg_deve); |
| 1053 | } |
| 1054 | } |
| 1055 | |
| 1056 | static int core_scsi3_alloc_registration( |
| 1057 | struct se_device *dev, |
| 1058 | struct se_node_acl *nacl, |
| 1059 | struct se_dev_entry *deve, |
| 1060 | unsigned char *isid, |
| 1061 | u64 sa_res_key, |
| 1062 | int all_tg_pt, |
| 1063 | int aptpl, |
Andy Grover | 33ce6a8 | 2013-05-16 10:40:54 -0700 | [diff] [blame] | 1064 | enum register_type register_type, |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 1065 | int register_move) |
| 1066 | { |
| 1067 | struct t10_pr_registration *pr_reg; |
| 1068 | |
| 1069 | pr_reg = __core_scsi3_alloc_registration(dev, nacl, deve, isid, |
| 1070 | sa_res_key, all_tg_pt, aptpl); |
Andy Grover | 6708bb2 | 2011-06-08 10:36:43 -0700 | [diff] [blame] | 1071 | if (!pr_reg) |
Andy Grover | e3d6f90 | 2011-07-19 08:55:10 +0000 | [diff] [blame] | 1072 | return -EPERM; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 1073 | |
| 1074 | __core_scsi3_add_registration(dev, nacl, pr_reg, |
| 1075 | register_type, register_move); |
| 1076 | return 0; |
| 1077 | } |
| 1078 | |
| 1079 | static struct t10_pr_registration *__core_scsi3_locate_pr_reg( |
| 1080 | struct se_device *dev, |
| 1081 | struct se_node_acl *nacl, |
| 1082 | unsigned char *isid) |
| 1083 | { |
Christoph Hellwig | 0fd97cc | 2012-10-08 00:03:19 -0400 | [diff] [blame] | 1084 | struct t10_reservation *pr_tmpl = &dev->t10_pr; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 1085 | struct t10_pr_registration *pr_reg, *pr_reg_tmp; |
| 1086 | struct se_portal_group *tpg; |
| 1087 | |
| 1088 | spin_lock(&pr_tmpl->registration_lock); |
| 1089 | list_for_each_entry_safe(pr_reg, pr_reg_tmp, |
| 1090 | &pr_tmpl->registration_list, pr_reg_list) { |
| 1091 | /* |
| 1092 | * First look for a matching struct se_node_acl |
| 1093 | */ |
| 1094 | if (pr_reg->pr_reg_nacl != nacl) |
| 1095 | continue; |
| 1096 | |
| 1097 | tpg = pr_reg->pr_reg_nacl->se_tpg; |
| 1098 | /* |
| 1099 | * If this registration does NOT contain a fabric provided |
| 1100 | * ISID, then we have found a match. |
| 1101 | */ |
Andy Grover | 6708bb2 | 2011-06-08 10:36:43 -0700 | [diff] [blame] | 1102 | if (!pr_reg->isid_present_at_reg) { |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 1103 | /* |
| 1104 | * Determine if this SCSI device server requires that |
| 1105 | * SCSI Intiatior TransportID w/ ISIDs is enforced |
| 1106 | * for fabric modules (iSCSI) requiring them. |
| 1107 | */ |
Andy Grover | e3d6f90 | 2011-07-19 08:55:10 +0000 | [diff] [blame] | 1108 | if (tpg->se_tpg_tfo->sess_get_initiator_sid != NULL) { |
Christoph Hellwig | 0fd97cc | 2012-10-08 00:03:19 -0400 | [diff] [blame] | 1109 | if (dev->dev_attrib.enforce_pr_isids) |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 1110 | continue; |
| 1111 | } |
| 1112 | atomic_inc(&pr_reg->pr_res_holders); |
| 1113 | smp_mb__after_atomic_inc(); |
| 1114 | spin_unlock(&pr_tmpl->registration_lock); |
| 1115 | return pr_reg; |
| 1116 | } |
| 1117 | /* |
| 1118 | * If the *pr_reg contains a fabric defined ISID for multi-value |
| 1119 | * SCSI Initiator Port TransportIDs, then we expect a valid |
| 1120 | * matching ISID to be provided by the local SCSI Initiator Port. |
| 1121 | */ |
Andy Grover | 6708bb2 | 2011-06-08 10:36:43 -0700 | [diff] [blame] | 1122 | if (!isid) |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 1123 | continue; |
| 1124 | if (strcmp(isid, pr_reg->pr_reg_isid)) |
| 1125 | continue; |
| 1126 | |
| 1127 | atomic_inc(&pr_reg->pr_res_holders); |
| 1128 | smp_mb__after_atomic_inc(); |
| 1129 | spin_unlock(&pr_tmpl->registration_lock); |
| 1130 | return pr_reg; |
| 1131 | } |
| 1132 | spin_unlock(&pr_tmpl->registration_lock); |
| 1133 | |
| 1134 | return NULL; |
| 1135 | } |
| 1136 | |
| 1137 | static struct t10_pr_registration *core_scsi3_locate_pr_reg( |
| 1138 | struct se_device *dev, |
| 1139 | struct se_node_acl *nacl, |
| 1140 | struct se_session *sess) |
| 1141 | { |
| 1142 | struct se_portal_group *tpg = nacl->se_tpg; |
| 1143 | unsigned char buf[PR_REG_ISID_LEN], *isid_ptr = NULL; |
| 1144 | |
Andy Grover | e3d6f90 | 2011-07-19 08:55:10 +0000 | [diff] [blame] | 1145 | if (tpg->se_tpg_tfo->sess_get_initiator_sid != NULL) { |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 1146 | memset(&buf[0], 0, PR_REG_ISID_LEN); |
Andy Grover | e3d6f90 | 2011-07-19 08:55:10 +0000 | [diff] [blame] | 1147 | tpg->se_tpg_tfo->sess_get_initiator_sid(sess, &buf[0], |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 1148 | PR_REG_ISID_LEN); |
| 1149 | isid_ptr = &buf[0]; |
| 1150 | } |
| 1151 | |
| 1152 | return __core_scsi3_locate_pr_reg(dev, nacl, isid_ptr); |
| 1153 | } |
| 1154 | |
| 1155 | static void core_scsi3_put_pr_reg(struct t10_pr_registration *pr_reg) |
| 1156 | { |
| 1157 | atomic_dec(&pr_reg->pr_res_holders); |
| 1158 | smp_mb__after_atomic_dec(); |
| 1159 | } |
| 1160 | |
| 1161 | static int core_scsi3_check_implict_release( |
| 1162 | struct se_device *dev, |
| 1163 | struct t10_pr_registration *pr_reg) |
| 1164 | { |
| 1165 | struct se_node_acl *nacl = pr_reg->pr_reg_nacl; |
| 1166 | struct t10_pr_registration *pr_res_holder; |
| 1167 | int ret = 0; |
| 1168 | |
| 1169 | spin_lock(&dev->dev_reservation_lock); |
| 1170 | pr_res_holder = dev->dev_pr_res_holder; |
Andy Grover | 6708bb2 | 2011-06-08 10:36:43 -0700 | [diff] [blame] | 1171 | if (!pr_res_holder) { |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 1172 | spin_unlock(&dev->dev_reservation_lock); |
| 1173 | return ret; |
| 1174 | } |
| 1175 | if (pr_res_holder == pr_reg) { |
| 1176 | /* |
| 1177 | * Perform an implict RELEASE if the registration that |
| 1178 | * is being released is holding the reservation. |
| 1179 | * |
| 1180 | * From spc4r17, section 5.7.11.1: |
| 1181 | * |
| 1182 | * e) If the I_T nexus is the persistent reservation holder |
| 1183 | * and the persistent reservation is not an all registrants |
| 1184 | * type, then a PERSISTENT RESERVE OUT command with REGISTER |
| 1185 | * service action or REGISTER AND IGNORE EXISTING KEY |
| 1186 | * service action with the SERVICE ACTION RESERVATION KEY |
| 1187 | * field set to zero (see 5.7.11.3). |
| 1188 | */ |
| 1189 | __core_scsi3_complete_pro_release(dev, nacl, pr_reg, 0); |
| 1190 | ret = 1; |
| 1191 | /* |
| 1192 | * For 'All Registrants' reservation types, all existing |
| 1193 | * registrations are still processed as reservation holders |
| 1194 | * in core_scsi3_pr_seq_non_holder() after the initial |
| 1195 | * reservation holder is implictly released here. |
| 1196 | */ |
| 1197 | } else if (pr_reg->pr_reg_all_tg_pt && |
| 1198 | (!strcmp(pr_res_holder->pr_reg_nacl->initiatorname, |
| 1199 | pr_reg->pr_reg_nacl->initiatorname)) && |
| 1200 | (pr_res_holder->pr_res_key == pr_reg->pr_res_key)) { |
Andy Grover | 6708bb2 | 2011-06-08 10:36:43 -0700 | [diff] [blame] | 1201 | pr_err("SPC-3 PR: Unable to perform ALL_TG_PT=1" |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 1202 | " UNREGISTER while existing reservation with matching" |
| 1203 | " key 0x%016Lx is present from another SCSI Initiator" |
| 1204 | " Port\n", pr_reg->pr_res_key); |
Andy Grover | e3d6f90 | 2011-07-19 08:55:10 +0000 | [diff] [blame] | 1205 | ret = -EPERM; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 1206 | } |
| 1207 | spin_unlock(&dev->dev_reservation_lock); |
| 1208 | |
| 1209 | return ret; |
| 1210 | } |
| 1211 | |
| 1212 | /* |
Andy Grover | e3d6f90 | 2011-07-19 08:55:10 +0000 | [diff] [blame] | 1213 | * Called with struct t10_reservation->registration_lock held. |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 1214 | */ |
| 1215 | static void __core_scsi3_free_registration( |
| 1216 | struct se_device *dev, |
| 1217 | struct t10_pr_registration *pr_reg, |
| 1218 | struct list_head *preempt_and_abort_list, |
| 1219 | int dec_holders) |
| 1220 | { |
| 1221 | struct target_core_fabric_ops *tfo = |
| 1222 | pr_reg->pr_reg_nacl->se_tpg->se_tpg_tfo; |
Christoph Hellwig | 0fd97cc | 2012-10-08 00:03:19 -0400 | [diff] [blame] | 1223 | struct t10_reservation *pr_tmpl = &dev->t10_pr; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 1224 | char i_buf[PR_REG_ISID_ID_LEN]; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 1225 | |
| 1226 | memset(i_buf, 0, PR_REG_ISID_ID_LEN); |
Andy Grover | d2843c1 | 2013-05-16 10:40:55 -0700 | [diff] [blame] | 1227 | core_pr_dump_initiator_port(pr_reg, i_buf, PR_REG_ISID_ID_LEN); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 1228 | |
| 1229 | pr_reg->pr_reg_deve->def_pr_registered = 0; |
| 1230 | pr_reg->pr_reg_deve->pr_res_key = 0; |
| 1231 | list_del(&pr_reg->pr_reg_list); |
| 1232 | /* |
| 1233 | * Caller accessing *pr_reg using core_scsi3_locate_pr_reg(), |
| 1234 | * so call core_scsi3_put_pr_reg() to decrement our reference. |
| 1235 | */ |
| 1236 | if (dec_holders) |
| 1237 | core_scsi3_put_pr_reg(pr_reg); |
| 1238 | /* |
| 1239 | * Wait until all reference from any other I_T nexuses for this |
| 1240 | * *pr_reg have been released. Because list_del() is called above, |
| 1241 | * the last core_scsi3_put_pr_reg(pr_reg) will release this reference |
| 1242 | * count back to zero, and we release *pr_reg. |
| 1243 | */ |
| 1244 | while (atomic_read(&pr_reg->pr_res_holders) != 0) { |
| 1245 | spin_unlock(&pr_tmpl->registration_lock); |
Andy Grover | 6708bb2 | 2011-06-08 10:36:43 -0700 | [diff] [blame] | 1246 | pr_debug("SPC-3 PR [%s] waiting for pr_res_holders\n", |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 1247 | tfo->get_fabric_name()); |
| 1248 | cpu_relax(); |
| 1249 | spin_lock(&pr_tmpl->registration_lock); |
| 1250 | } |
| 1251 | |
Andy Grover | 6708bb2 | 2011-06-08 10:36:43 -0700 | [diff] [blame] | 1252 | pr_debug("SPC-3 PR [%s] Service Action: UNREGISTER Initiator" |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 1253 | " Node: %s%s\n", tfo->get_fabric_name(), |
| 1254 | pr_reg->pr_reg_nacl->initiatorname, |
Andy Grover | d2843c1 | 2013-05-16 10:40:55 -0700 | [diff] [blame] | 1255 | i_buf); |
Andy Grover | 6708bb2 | 2011-06-08 10:36:43 -0700 | [diff] [blame] | 1256 | pr_debug("SPC-3 PR [%s] for %s TCM Subsystem %s Object Target" |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 1257 | " Port(s)\n", tfo->get_fabric_name(), |
| 1258 | (pr_reg->pr_reg_all_tg_pt) ? "ALL" : "SINGLE", |
Andy Grover | e3d6f90 | 2011-07-19 08:55:10 +0000 | [diff] [blame] | 1259 | dev->transport->name); |
Andy Grover | 6708bb2 | 2011-06-08 10:36:43 -0700 | [diff] [blame] | 1260 | pr_debug("SPC-3 PR [%s] SA Res Key: 0x%016Lx PRgeneration:" |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 1261 | " 0x%08x\n", tfo->get_fabric_name(), pr_reg->pr_res_key, |
| 1262 | pr_reg->pr_res_generation); |
| 1263 | |
Andy Grover | 6708bb2 | 2011-06-08 10:36:43 -0700 | [diff] [blame] | 1264 | if (!preempt_and_abort_list) { |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 1265 | pr_reg->pr_reg_deve = NULL; |
| 1266 | pr_reg->pr_reg_nacl = NULL; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 1267 | kmem_cache_free(t10_pr_reg_cache, pr_reg); |
| 1268 | return; |
| 1269 | } |
| 1270 | /* |
| 1271 | * For PREEMPT_AND_ABORT, the list of *pr_reg in preempt_and_abort_list |
| 1272 | * are released once the ABORT_TASK_SET has completed.. |
| 1273 | */ |
| 1274 | list_add_tail(&pr_reg->pr_reg_abort_list, preempt_and_abort_list); |
| 1275 | } |
| 1276 | |
| 1277 | void core_scsi3_free_pr_reg_from_nacl( |
| 1278 | struct se_device *dev, |
| 1279 | struct se_node_acl *nacl) |
| 1280 | { |
Christoph Hellwig | 0fd97cc | 2012-10-08 00:03:19 -0400 | [diff] [blame] | 1281 | struct t10_reservation *pr_tmpl = &dev->t10_pr; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 1282 | struct t10_pr_registration *pr_reg, *pr_reg_tmp, *pr_res_holder; |
| 1283 | /* |
| 1284 | * If the passed se_node_acl matches the reservation holder, |
| 1285 | * release the reservation. |
| 1286 | */ |
| 1287 | spin_lock(&dev->dev_reservation_lock); |
| 1288 | pr_res_holder = dev->dev_pr_res_holder; |
| 1289 | if ((pr_res_holder != NULL) && |
| 1290 | (pr_res_holder->pr_reg_nacl == nacl)) |
| 1291 | __core_scsi3_complete_pro_release(dev, nacl, pr_res_holder, 0); |
| 1292 | spin_unlock(&dev->dev_reservation_lock); |
| 1293 | /* |
| 1294 | * Release any registration associated with the struct se_node_acl. |
| 1295 | */ |
| 1296 | spin_lock(&pr_tmpl->registration_lock); |
| 1297 | list_for_each_entry_safe(pr_reg, pr_reg_tmp, |
| 1298 | &pr_tmpl->registration_list, pr_reg_list) { |
| 1299 | |
| 1300 | if (pr_reg->pr_reg_nacl != nacl) |
| 1301 | continue; |
| 1302 | |
| 1303 | __core_scsi3_free_registration(dev, pr_reg, NULL, 0); |
| 1304 | } |
| 1305 | spin_unlock(&pr_tmpl->registration_lock); |
| 1306 | } |
| 1307 | |
| 1308 | void core_scsi3_free_all_registrations( |
| 1309 | struct se_device *dev) |
| 1310 | { |
Christoph Hellwig | 0fd97cc | 2012-10-08 00:03:19 -0400 | [diff] [blame] | 1311 | struct t10_reservation *pr_tmpl = &dev->t10_pr; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 1312 | struct t10_pr_registration *pr_reg, *pr_reg_tmp, *pr_res_holder; |
| 1313 | |
| 1314 | spin_lock(&dev->dev_reservation_lock); |
| 1315 | pr_res_holder = dev->dev_pr_res_holder; |
| 1316 | if (pr_res_holder != NULL) { |
| 1317 | struct se_node_acl *pr_res_nacl = pr_res_holder->pr_reg_nacl; |
| 1318 | __core_scsi3_complete_pro_release(dev, pr_res_nacl, |
| 1319 | pr_res_holder, 0); |
| 1320 | } |
| 1321 | spin_unlock(&dev->dev_reservation_lock); |
| 1322 | |
| 1323 | spin_lock(&pr_tmpl->registration_lock); |
| 1324 | list_for_each_entry_safe(pr_reg, pr_reg_tmp, |
| 1325 | &pr_tmpl->registration_list, pr_reg_list) { |
| 1326 | |
| 1327 | __core_scsi3_free_registration(dev, pr_reg, NULL, 0); |
| 1328 | } |
| 1329 | spin_unlock(&pr_tmpl->registration_lock); |
| 1330 | |
| 1331 | spin_lock(&pr_tmpl->aptpl_reg_lock); |
| 1332 | list_for_each_entry_safe(pr_reg, pr_reg_tmp, &pr_tmpl->aptpl_reg_list, |
| 1333 | pr_reg_aptpl_list) { |
| 1334 | list_del(&pr_reg->pr_reg_aptpl_list); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 1335 | kmem_cache_free(t10_pr_reg_cache, pr_reg); |
| 1336 | } |
| 1337 | spin_unlock(&pr_tmpl->aptpl_reg_lock); |
| 1338 | } |
| 1339 | |
| 1340 | static int core_scsi3_tpg_depend_item(struct se_portal_group *tpg) |
| 1341 | { |
Andy Grover | e3d6f90 | 2011-07-19 08:55:10 +0000 | [diff] [blame] | 1342 | return configfs_depend_item(tpg->se_tpg_tfo->tf_subsys, |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 1343 | &tpg->tpg_group.cg_item); |
| 1344 | } |
| 1345 | |
| 1346 | static void core_scsi3_tpg_undepend_item(struct se_portal_group *tpg) |
| 1347 | { |
Andy Grover | e3d6f90 | 2011-07-19 08:55:10 +0000 | [diff] [blame] | 1348 | configfs_undepend_item(tpg->se_tpg_tfo->tf_subsys, |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 1349 | &tpg->tpg_group.cg_item); |
| 1350 | |
| 1351 | atomic_dec(&tpg->tpg_pr_ref_count); |
| 1352 | smp_mb__after_atomic_dec(); |
| 1353 | } |
| 1354 | |
| 1355 | static int core_scsi3_nodeacl_depend_item(struct se_node_acl *nacl) |
| 1356 | { |
| 1357 | struct se_portal_group *tpg = nacl->se_tpg; |
| 1358 | |
| 1359 | if (nacl->dynamic_node_acl) |
| 1360 | return 0; |
| 1361 | |
Andy Grover | e3d6f90 | 2011-07-19 08:55:10 +0000 | [diff] [blame] | 1362 | return configfs_depend_item(tpg->se_tpg_tfo->tf_subsys, |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 1363 | &nacl->acl_group.cg_item); |
| 1364 | } |
| 1365 | |
| 1366 | static void core_scsi3_nodeacl_undepend_item(struct se_node_acl *nacl) |
| 1367 | { |
| 1368 | struct se_portal_group *tpg = nacl->se_tpg; |
| 1369 | |
| 1370 | if (nacl->dynamic_node_acl) { |
| 1371 | atomic_dec(&nacl->acl_pr_ref_count); |
| 1372 | smp_mb__after_atomic_dec(); |
| 1373 | return; |
| 1374 | } |
| 1375 | |
Andy Grover | e3d6f90 | 2011-07-19 08:55:10 +0000 | [diff] [blame] | 1376 | configfs_undepend_item(tpg->se_tpg_tfo->tf_subsys, |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 1377 | &nacl->acl_group.cg_item); |
| 1378 | |
| 1379 | atomic_dec(&nacl->acl_pr_ref_count); |
| 1380 | smp_mb__after_atomic_dec(); |
| 1381 | } |
| 1382 | |
| 1383 | static int core_scsi3_lunacl_depend_item(struct se_dev_entry *se_deve) |
| 1384 | { |
| 1385 | struct se_lun_acl *lun_acl = se_deve->se_lun_acl; |
| 1386 | struct se_node_acl *nacl; |
| 1387 | struct se_portal_group *tpg; |
| 1388 | /* |
| 1389 | * For nacl->dynamic_node_acl=1 |
| 1390 | */ |
Andy Grover | 6708bb2 | 2011-06-08 10:36:43 -0700 | [diff] [blame] | 1391 | if (!lun_acl) |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 1392 | return 0; |
| 1393 | |
| 1394 | nacl = lun_acl->se_lun_nacl; |
| 1395 | tpg = nacl->se_tpg; |
| 1396 | |
Andy Grover | e3d6f90 | 2011-07-19 08:55:10 +0000 | [diff] [blame] | 1397 | return configfs_depend_item(tpg->se_tpg_tfo->tf_subsys, |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 1398 | &lun_acl->se_lun_group.cg_item); |
| 1399 | } |
| 1400 | |
| 1401 | static void core_scsi3_lunacl_undepend_item(struct se_dev_entry *se_deve) |
| 1402 | { |
| 1403 | struct se_lun_acl *lun_acl = se_deve->se_lun_acl; |
| 1404 | struct se_node_acl *nacl; |
| 1405 | struct se_portal_group *tpg; |
| 1406 | /* |
| 1407 | * For nacl->dynamic_node_acl=1 |
| 1408 | */ |
Andy Grover | 6708bb2 | 2011-06-08 10:36:43 -0700 | [diff] [blame] | 1409 | if (!lun_acl) { |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 1410 | atomic_dec(&se_deve->pr_ref_count); |
| 1411 | smp_mb__after_atomic_dec(); |
| 1412 | return; |
| 1413 | } |
| 1414 | nacl = lun_acl->se_lun_nacl; |
| 1415 | tpg = nacl->se_tpg; |
| 1416 | |
Andy Grover | e3d6f90 | 2011-07-19 08:55:10 +0000 | [diff] [blame] | 1417 | configfs_undepend_item(tpg->se_tpg_tfo->tf_subsys, |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 1418 | &lun_acl->se_lun_group.cg_item); |
| 1419 | |
| 1420 | atomic_dec(&se_deve->pr_ref_count); |
| 1421 | smp_mb__after_atomic_dec(); |
| 1422 | } |
| 1423 | |
Christoph Hellwig | de103c9 | 2012-11-06 12:24:09 -0800 | [diff] [blame] | 1424 | static sense_reason_t |
| 1425 | core_scsi3_decode_spec_i_port( |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 1426 | struct se_cmd *cmd, |
| 1427 | struct se_portal_group *tpg, |
| 1428 | unsigned char *l_isid, |
| 1429 | u64 sa_res_key, |
| 1430 | int all_tg_pt, |
| 1431 | int aptpl) |
| 1432 | { |
Andy Grover | 5951146d | 2011-07-19 10:26:37 +0000 | [diff] [blame] | 1433 | struct se_device *dev = cmd->se_dev; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 1434 | struct se_port *tmp_port; |
| 1435 | struct se_portal_group *dest_tpg = NULL, *tmp_tpg; |
Andy Grover | e3d6f90 | 2011-07-19 08:55:10 +0000 | [diff] [blame] | 1436 | struct se_session *se_sess = cmd->se_sess; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 1437 | struct se_node_acl *dest_node_acl = NULL; |
| 1438 | struct se_dev_entry *dest_se_deve = NULL, *local_se_deve; |
| 1439 | struct t10_pr_registration *dest_pr_reg, *local_pr_reg, *pr_reg_e; |
| 1440 | struct t10_pr_registration *pr_reg_tmp, *pr_reg_tmp_safe; |
Roland Dreier | d0f474e | 2012-01-12 10:41:18 -0800 | [diff] [blame] | 1441 | LIST_HEAD(tid_dest_list); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 1442 | struct pr_transport_id_holder *tidh_new, *tidh, *tidh_tmp; |
| 1443 | struct target_core_fabric_ops *tmp_tf_ops; |
Andy Grover | 05d1c7c | 2011-07-20 19:13:28 +0000 | [diff] [blame] | 1444 | unsigned char *buf; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 1445 | unsigned char *ptr, *i_str = NULL, proto_ident, tmp_proto_ident; |
| 1446 | char *iport_ptr = NULL, dest_iport[64], i_buf[PR_REG_ISID_ID_LEN]; |
Christoph Hellwig | de103c9 | 2012-11-06 12:24:09 -0800 | [diff] [blame] | 1447 | sense_reason_t ret; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 1448 | u32 tpdl, tid_len = 0; |
Andy Grover | d2843c1 | 2013-05-16 10:40:55 -0700 | [diff] [blame] | 1449 | int dest_local_nexus; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 1450 | u32 dest_rtpi = 0; |
| 1451 | |
| 1452 | memset(dest_iport, 0, 64); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 1453 | |
Jörn Engel | f208324 | 2012-03-15 15:05:40 -0400 | [diff] [blame] | 1454 | local_se_deve = se_sess->se_node_acl->device_list[cmd->orig_fe_lun]; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 1455 | /* |
| 1456 | * Allocate a struct pr_transport_id_holder and setup the |
| 1457 | * local_node_acl and local_se_deve pointers and add to |
| 1458 | * struct list_head tid_dest_list for add registration |
| 1459 | * processing in the loop of tid_dest_list below. |
| 1460 | */ |
| 1461 | tidh_new = kzalloc(sizeof(struct pr_transport_id_holder), GFP_KERNEL); |
Andy Grover | 6708bb2 | 2011-06-08 10:36:43 -0700 | [diff] [blame] | 1462 | if (!tidh_new) { |
| 1463 | pr_err("Unable to allocate tidh_new\n"); |
Christoph Hellwig | de103c9 | 2012-11-06 12:24:09 -0800 | [diff] [blame] | 1464 | return TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 1465 | } |
| 1466 | INIT_LIST_HEAD(&tidh_new->dest_list); |
| 1467 | tidh_new->dest_tpg = tpg; |
| 1468 | tidh_new->dest_node_acl = se_sess->se_node_acl; |
| 1469 | tidh_new->dest_se_deve = local_se_deve; |
| 1470 | |
Andy Grover | 5951146d | 2011-07-19 10:26:37 +0000 | [diff] [blame] | 1471 | local_pr_reg = __core_scsi3_alloc_registration(cmd->se_dev, |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 1472 | se_sess->se_node_acl, local_se_deve, l_isid, |
| 1473 | sa_res_key, all_tg_pt, aptpl); |
Andy Grover | 6708bb2 | 2011-06-08 10:36:43 -0700 | [diff] [blame] | 1474 | if (!local_pr_reg) { |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 1475 | kfree(tidh_new); |
Christoph Hellwig | de103c9 | 2012-11-06 12:24:09 -0800 | [diff] [blame] | 1476 | return TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 1477 | } |
| 1478 | tidh_new->dest_pr_reg = local_pr_reg; |
| 1479 | /* |
| 1480 | * The local I_T nexus does not hold any configfs dependances, |
| 1481 | * so we set tid_h->dest_local_nexus=1 to prevent the |
| 1482 | * configfs_undepend_item() calls in the tid_dest_list loops below. |
| 1483 | */ |
| 1484 | tidh_new->dest_local_nexus = 1; |
| 1485 | list_add_tail(&tidh_new->dest_list, &tid_dest_list); |
Andy Grover | 05d1c7c | 2011-07-20 19:13:28 +0000 | [diff] [blame] | 1486 | |
Paolo Bonzini | 0d7f129 | 2012-09-07 17:30:33 +0200 | [diff] [blame] | 1487 | if (cmd->data_length < 28) { |
| 1488 | pr_warn("SPC-PR: Received PR OUT parameter list" |
| 1489 | " length too small: %u\n", cmd->data_length); |
Christoph Hellwig | de103c9 | 2012-11-06 12:24:09 -0800 | [diff] [blame] | 1490 | ret = TCM_INVALID_PARAMETER_LIST; |
Paolo Bonzini | 0d7f129 | 2012-09-07 17:30:33 +0200 | [diff] [blame] | 1491 | goto out; |
| 1492 | } |
| 1493 | |
Andy Grover | 4949314 | 2012-01-16 16:57:08 -0800 | [diff] [blame] | 1494 | buf = transport_kmap_data_sg(cmd); |
Christoph Hellwig | de103c9 | 2012-11-06 12:24:09 -0800 | [diff] [blame] | 1495 | if (!buf) { |
| 1496 | ret = TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; |
| 1497 | goto out; |
| 1498 | } |
| 1499 | |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 1500 | /* |
| 1501 | * For a PERSISTENT RESERVE OUT specify initiator ports payload, |
| 1502 | * first extract TransportID Parameter Data Length, and make sure |
| 1503 | * the value matches up to the SCSI expected data transfer length. |
| 1504 | */ |
| 1505 | tpdl = (buf[24] & 0xff) << 24; |
| 1506 | tpdl |= (buf[25] & 0xff) << 16; |
| 1507 | tpdl |= (buf[26] & 0xff) << 8; |
| 1508 | tpdl |= buf[27] & 0xff; |
| 1509 | |
| 1510 | if ((tpdl + 28) != cmd->data_length) { |
Andy Grover | 6708bb2 | 2011-06-08 10:36:43 -0700 | [diff] [blame] | 1511 | pr_err("SPC-3 PR: Illegal tpdl: %u + 28 byte header" |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 1512 | " does not equal CDB data_length: %u\n", tpdl, |
| 1513 | cmd->data_length); |
Christoph Hellwig | de103c9 | 2012-11-06 12:24:09 -0800 | [diff] [blame] | 1514 | ret = TCM_INVALID_PARAMETER_LIST; |
| 1515 | goto out_unmap; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 1516 | } |
| 1517 | /* |
| 1518 | * Start processing the received transport IDs using the |
| 1519 | * receiving I_T Nexus portal's fabric dependent methods to |
| 1520 | * obtain the SCSI Initiator Port/Device Identifiers. |
| 1521 | */ |
| 1522 | ptr = &buf[28]; |
| 1523 | |
| 1524 | while (tpdl > 0) { |
| 1525 | proto_ident = (ptr[0] & 0x0f); |
| 1526 | dest_tpg = NULL; |
| 1527 | |
| 1528 | spin_lock(&dev->se_port_lock); |
| 1529 | list_for_each_entry(tmp_port, &dev->dev_sep_list, sep_list) { |
| 1530 | tmp_tpg = tmp_port->sep_tpg; |
Andy Grover | 6708bb2 | 2011-06-08 10:36:43 -0700 | [diff] [blame] | 1531 | if (!tmp_tpg) |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 1532 | continue; |
Andy Grover | e3d6f90 | 2011-07-19 08:55:10 +0000 | [diff] [blame] | 1533 | tmp_tf_ops = tmp_tpg->se_tpg_tfo; |
Andy Grover | 6708bb2 | 2011-06-08 10:36:43 -0700 | [diff] [blame] | 1534 | if (!tmp_tf_ops) |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 1535 | continue; |
Andy Grover | 6708bb2 | 2011-06-08 10:36:43 -0700 | [diff] [blame] | 1536 | if (!tmp_tf_ops->get_fabric_proto_ident || |
| 1537 | !tmp_tf_ops->tpg_parse_pr_out_transport_id) |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 1538 | continue; |
| 1539 | /* |
| 1540 | * Look for the matching proto_ident provided by |
| 1541 | * the received TransportID |
| 1542 | */ |
| 1543 | tmp_proto_ident = tmp_tf_ops->get_fabric_proto_ident(tmp_tpg); |
| 1544 | if (tmp_proto_ident != proto_ident) |
| 1545 | continue; |
| 1546 | dest_rtpi = tmp_port->sep_rtpi; |
| 1547 | |
| 1548 | i_str = tmp_tf_ops->tpg_parse_pr_out_transport_id( |
| 1549 | tmp_tpg, (const char *)ptr, &tid_len, |
| 1550 | &iport_ptr); |
Andy Grover | 6708bb2 | 2011-06-08 10:36:43 -0700 | [diff] [blame] | 1551 | if (!i_str) |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 1552 | continue; |
| 1553 | |
| 1554 | atomic_inc(&tmp_tpg->tpg_pr_ref_count); |
| 1555 | smp_mb__after_atomic_inc(); |
| 1556 | spin_unlock(&dev->se_port_lock); |
| 1557 | |
Christoph Hellwig | de103c9 | 2012-11-06 12:24:09 -0800 | [diff] [blame] | 1558 | if (core_scsi3_tpg_depend_item(tmp_tpg)) { |
Andy Grover | 6708bb2 | 2011-06-08 10:36:43 -0700 | [diff] [blame] | 1559 | pr_err(" core_scsi3_tpg_depend_item()" |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 1560 | " for tmp_tpg\n"); |
| 1561 | atomic_dec(&tmp_tpg->tpg_pr_ref_count); |
| 1562 | smp_mb__after_atomic_dec(); |
Christoph Hellwig | de103c9 | 2012-11-06 12:24:09 -0800 | [diff] [blame] | 1563 | ret = TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; |
| 1564 | goto out_unmap; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 1565 | } |
| 1566 | /* |
Masanari Iida | 35d1efe | 2012-08-16 22:43:13 +0900 | [diff] [blame] | 1567 | * Locate the destination initiator ACL to be registered |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 1568 | * from the decoded fabric module specific TransportID |
| 1569 | * at *i_str. |
| 1570 | */ |
Roland Dreier | 2863888 | 2011-08-16 09:40:01 -0700 | [diff] [blame] | 1571 | spin_lock_irq(&tmp_tpg->acl_node_lock); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 1572 | dest_node_acl = __core_tpg_get_initiator_node_acl( |
| 1573 | tmp_tpg, i_str); |
| 1574 | if (dest_node_acl) { |
| 1575 | atomic_inc(&dest_node_acl->acl_pr_ref_count); |
| 1576 | smp_mb__after_atomic_inc(); |
| 1577 | } |
Roland Dreier | 2863888 | 2011-08-16 09:40:01 -0700 | [diff] [blame] | 1578 | spin_unlock_irq(&tmp_tpg->acl_node_lock); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 1579 | |
Andy Grover | 6708bb2 | 2011-06-08 10:36:43 -0700 | [diff] [blame] | 1580 | if (!dest_node_acl) { |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 1581 | core_scsi3_tpg_undepend_item(tmp_tpg); |
| 1582 | spin_lock(&dev->se_port_lock); |
| 1583 | continue; |
| 1584 | } |
| 1585 | |
Christoph Hellwig | de103c9 | 2012-11-06 12:24:09 -0800 | [diff] [blame] | 1586 | if (core_scsi3_nodeacl_depend_item(dest_node_acl)) { |
Andy Grover | 6708bb2 | 2011-06-08 10:36:43 -0700 | [diff] [blame] | 1587 | pr_err("configfs_depend_item() failed" |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 1588 | " for dest_node_acl->acl_group\n"); |
| 1589 | atomic_dec(&dest_node_acl->acl_pr_ref_count); |
| 1590 | smp_mb__after_atomic_dec(); |
| 1591 | core_scsi3_tpg_undepend_item(tmp_tpg); |
Christoph Hellwig | de103c9 | 2012-11-06 12:24:09 -0800 | [diff] [blame] | 1592 | ret = TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; |
| 1593 | goto out_unmap; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 1594 | } |
| 1595 | |
| 1596 | dest_tpg = tmp_tpg; |
Andy Grover | 6708bb2 | 2011-06-08 10:36:43 -0700 | [diff] [blame] | 1597 | pr_debug("SPC-3 PR SPEC_I_PT: Located %s Node:" |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 1598 | " %s Port RTPI: %hu\n", |
Andy Grover | e3d6f90 | 2011-07-19 08:55:10 +0000 | [diff] [blame] | 1599 | dest_tpg->se_tpg_tfo->get_fabric_name(), |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 1600 | dest_node_acl->initiatorname, dest_rtpi); |
| 1601 | |
| 1602 | spin_lock(&dev->se_port_lock); |
| 1603 | break; |
| 1604 | } |
| 1605 | spin_unlock(&dev->se_port_lock); |
| 1606 | |
Andy Grover | 6708bb2 | 2011-06-08 10:36:43 -0700 | [diff] [blame] | 1607 | if (!dest_tpg) { |
| 1608 | pr_err("SPC-3 PR SPEC_I_PT: Unable to locate" |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 1609 | " dest_tpg\n"); |
Christoph Hellwig | de103c9 | 2012-11-06 12:24:09 -0800 | [diff] [blame] | 1610 | ret = TCM_INVALID_PARAMETER_LIST; |
| 1611 | goto out_unmap; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 1612 | } |
Andy Grover | 8b1e124 | 2012-04-03 15:51:12 -0700 | [diff] [blame] | 1613 | |
Andy Grover | 6708bb2 | 2011-06-08 10:36:43 -0700 | [diff] [blame] | 1614 | pr_debug("SPC-3 PR SPEC_I_PT: Got %s data_length: %u tpdl: %u" |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 1615 | " tid_len: %d for %s + %s\n", |
Andy Grover | e3d6f90 | 2011-07-19 08:55:10 +0000 | [diff] [blame] | 1616 | dest_tpg->se_tpg_tfo->get_fabric_name(), cmd->data_length, |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 1617 | tpdl, tid_len, i_str, iport_ptr); |
Andy Grover | 8b1e124 | 2012-04-03 15:51:12 -0700 | [diff] [blame] | 1618 | |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 1619 | if (tid_len > tpdl) { |
Andy Grover | 6708bb2 | 2011-06-08 10:36:43 -0700 | [diff] [blame] | 1620 | pr_err("SPC-3 PR SPEC_I_PT: Illegal tid_len:" |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 1621 | " %u for Transport ID: %s\n", tid_len, ptr); |
| 1622 | core_scsi3_nodeacl_undepend_item(dest_node_acl); |
| 1623 | core_scsi3_tpg_undepend_item(dest_tpg); |
Christoph Hellwig | de103c9 | 2012-11-06 12:24:09 -0800 | [diff] [blame] | 1624 | ret = TCM_INVALID_PARAMETER_LIST; |
| 1625 | goto out_unmap; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 1626 | } |
| 1627 | /* |
| 1628 | * Locate the desintation struct se_dev_entry pointer for matching |
| 1629 | * RELATIVE TARGET PORT IDENTIFIER on the receiving I_T Nexus |
| 1630 | * Target Port. |
| 1631 | */ |
| 1632 | dest_se_deve = core_get_se_deve_from_rtpi(dest_node_acl, |
| 1633 | dest_rtpi); |
Andy Grover | 6708bb2 | 2011-06-08 10:36:43 -0700 | [diff] [blame] | 1634 | if (!dest_se_deve) { |
| 1635 | pr_err("Unable to locate %s dest_se_deve" |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 1636 | " from destination RTPI: %hu\n", |
Andy Grover | e3d6f90 | 2011-07-19 08:55:10 +0000 | [diff] [blame] | 1637 | dest_tpg->se_tpg_tfo->get_fabric_name(), |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 1638 | dest_rtpi); |
| 1639 | |
| 1640 | core_scsi3_nodeacl_undepend_item(dest_node_acl); |
| 1641 | core_scsi3_tpg_undepend_item(dest_tpg); |
Christoph Hellwig | de103c9 | 2012-11-06 12:24:09 -0800 | [diff] [blame] | 1642 | ret = TCM_INVALID_PARAMETER_LIST; |
| 1643 | goto out_unmap; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 1644 | } |
| 1645 | |
Christoph Hellwig | de103c9 | 2012-11-06 12:24:09 -0800 | [diff] [blame] | 1646 | if (core_scsi3_lunacl_depend_item(dest_se_deve)) { |
Andy Grover | 6708bb2 | 2011-06-08 10:36:43 -0700 | [diff] [blame] | 1647 | pr_err("core_scsi3_lunacl_depend_item()" |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 1648 | " failed\n"); |
| 1649 | atomic_dec(&dest_se_deve->pr_ref_count); |
| 1650 | smp_mb__after_atomic_dec(); |
| 1651 | core_scsi3_nodeacl_undepend_item(dest_node_acl); |
| 1652 | core_scsi3_tpg_undepend_item(dest_tpg); |
Christoph Hellwig | de103c9 | 2012-11-06 12:24:09 -0800 | [diff] [blame] | 1653 | ret = TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; |
| 1654 | goto out_unmap; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 1655 | } |
Andy Grover | 8b1e124 | 2012-04-03 15:51:12 -0700 | [diff] [blame] | 1656 | |
Andy Grover | 6708bb2 | 2011-06-08 10:36:43 -0700 | [diff] [blame] | 1657 | pr_debug("SPC-3 PR SPEC_I_PT: Located %s Node: %s" |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 1658 | " dest_se_deve mapped_lun: %u\n", |
Andy Grover | e3d6f90 | 2011-07-19 08:55:10 +0000 | [diff] [blame] | 1659 | dest_tpg->se_tpg_tfo->get_fabric_name(), |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 1660 | dest_node_acl->initiatorname, dest_se_deve->mapped_lun); |
Andy Grover | 8b1e124 | 2012-04-03 15:51:12 -0700 | [diff] [blame] | 1661 | |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 1662 | /* |
| 1663 | * Skip any TransportIDs that already have a registration for |
| 1664 | * this target port. |
| 1665 | */ |
| 1666 | pr_reg_e = __core_scsi3_locate_pr_reg(dev, dest_node_acl, |
| 1667 | iport_ptr); |
| 1668 | if (pr_reg_e) { |
| 1669 | core_scsi3_put_pr_reg(pr_reg_e); |
| 1670 | core_scsi3_lunacl_undepend_item(dest_se_deve); |
| 1671 | core_scsi3_nodeacl_undepend_item(dest_node_acl); |
| 1672 | core_scsi3_tpg_undepend_item(dest_tpg); |
| 1673 | ptr += tid_len; |
| 1674 | tpdl -= tid_len; |
| 1675 | tid_len = 0; |
| 1676 | continue; |
| 1677 | } |
| 1678 | /* |
| 1679 | * Allocate a struct pr_transport_id_holder and setup |
| 1680 | * the dest_node_acl and dest_se_deve pointers for the |
| 1681 | * loop below. |
| 1682 | */ |
| 1683 | tidh_new = kzalloc(sizeof(struct pr_transport_id_holder), |
| 1684 | GFP_KERNEL); |
Andy Grover | 6708bb2 | 2011-06-08 10:36:43 -0700 | [diff] [blame] | 1685 | if (!tidh_new) { |
| 1686 | pr_err("Unable to allocate tidh_new\n"); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 1687 | core_scsi3_lunacl_undepend_item(dest_se_deve); |
| 1688 | core_scsi3_nodeacl_undepend_item(dest_node_acl); |
| 1689 | core_scsi3_tpg_undepend_item(dest_tpg); |
Christoph Hellwig | de103c9 | 2012-11-06 12:24:09 -0800 | [diff] [blame] | 1690 | ret = TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; |
| 1691 | goto out_unmap; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 1692 | } |
| 1693 | INIT_LIST_HEAD(&tidh_new->dest_list); |
| 1694 | tidh_new->dest_tpg = dest_tpg; |
| 1695 | tidh_new->dest_node_acl = dest_node_acl; |
| 1696 | tidh_new->dest_se_deve = dest_se_deve; |
| 1697 | |
| 1698 | /* |
| 1699 | * Allocate, but do NOT add the registration for the |
| 1700 | * TransportID referenced SCSI Initiator port. This |
| 1701 | * done because of the following from spc4r17 in section |
| 1702 | * 6.14.3 wrt SPEC_I_PT: |
| 1703 | * |
| 1704 | * "If a registration fails for any initiator port (e.g., if th |
| 1705 | * logical unit does not have enough resources available to |
| 1706 | * hold the registration information), no registrations shall be |
| 1707 | * made, and the command shall be terminated with |
| 1708 | * CHECK CONDITION status." |
| 1709 | * |
| 1710 | * That means we call __core_scsi3_alloc_registration() here, |
| 1711 | * and then call __core_scsi3_add_registration() in the |
| 1712 | * 2nd loop which will never fail. |
| 1713 | */ |
Andy Grover | 5951146d | 2011-07-19 10:26:37 +0000 | [diff] [blame] | 1714 | dest_pr_reg = __core_scsi3_alloc_registration(cmd->se_dev, |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 1715 | dest_node_acl, dest_se_deve, iport_ptr, |
| 1716 | sa_res_key, all_tg_pt, aptpl); |
Andy Grover | 6708bb2 | 2011-06-08 10:36:43 -0700 | [diff] [blame] | 1717 | if (!dest_pr_reg) { |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 1718 | core_scsi3_lunacl_undepend_item(dest_se_deve); |
| 1719 | core_scsi3_nodeacl_undepend_item(dest_node_acl); |
| 1720 | core_scsi3_tpg_undepend_item(dest_tpg); |
| 1721 | kfree(tidh_new); |
Christoph Hellwig | de103c9 | 2012-11-06 12:24:09 -0800 | [diff] [blame] | 1722 | ret = TCM_INVALID_PARAMETER_LIST; |
| 1723 | goto out_unmap; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 1724 | } |
| 1725 | tidh_new->dest_pr_reg = dest_pr_reg; |
| 1726 | list_add_tail(&tidh_new->dest_list, &tid_dest_list); |
| 1727 | |
| 1728 | ptr += tid_len; |
| 1729 | tpdl -= tid_len; |
| 1730 | tid_len = 0; |
| 1731 | |
| 1732 | } |
Andy Grover | 05d1c7c | 2011-07-20 19:13:28 +0000 | [diff] [blame] | 1733 | |
Andy Grover | 4949314 | 2012-01-16 16:57:08 -0800 | [diff] [blame] | 1734 | transport_kunmap_data_sg(cmd); |
Andy Grover | 05d1c7c | 2011-07-20 19:13:28 +0000 | [diff] [blame] | 1735 | |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 1736 | /* |
| 1737 | * Go ahead and create a registrations from tid_dest_list for the |
| 1738 | * SPEC_I_PT provided TransportID for the *tidh referenced dest_node_acl |
| 1739 | * and dest_se_deve. |
| 1740 | * |
| 1741 | * The SA Reservation Key from the PROUT is set for the |
| 1742 | * registration, and ALL_TG_PT is also passed. ALL_TG_PT=1 |
| 1743 | * means that the TransportID Initiator port will be |
| 1744 | * registered on all of the target ports in the SCSI target device |
| 1745 | * ALL_TG_PT=0 means the registration will only be for the |
| 1746 | * SCSI target port the PROUT REGISTER with SPEC_I_PT=1 |
| 1747 | * was received. |
| 1748 | */ |
| 1749 | list_for_each_entry_safe(tidh, tidh_tmp, &tid_dest_list, dest_list) { |
| 1750 | dest_tpg = tidh->dest_tpg; |
| 1751 | dest_node_acl = tidh->dest_node_acl; |
| 1752 | dest_se_deve = tidh->dest_se_deve; |
| 1753 | dest_pr_reg = tidh->dest_pr_reg; |
| 1754 | dest_local_nexus = tidh->dest_local_nexus; |
| 1755 | |
| 1756 | list_del(&tidh->dest_list); |
| 1757 | kfree(tidh); |
| 1758 | |
| 1759 | memset(i_buf, 0, PR_REG_ISID_ID_LEN); |
Andy Grover | d2843c1 | 2013-05-16 10:40:55 -0700 | [diff] [blame] | 1760 | core_pr_dump_initiator_port(dest_pr_reg, i_buf, PR_REG_ISID_ID_LEN); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 1761 | |
Andy Grover | 5951146d | 2011-07-19 10:26:37 +0000 | [diff] [blame] | 1762 | __core_scsi3_add_registration(cmd->se_dev, dest_node_acl, |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 1763 | dest_pr_reg, 0, 0); |
| 1764 | |
Andy Grover | 6708bb2 | 2011-06-08 10:36:43 -0700 | [diff] [blame] | 1765 | pr_debug("SPC-3 PR [%s] SPEC_I_PT: Successfully" |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 1766 | " registered Transport ID for Node: %s%s Mapped LUN:" |
Andy Grover | e3d6f90 | 2011-07-19 08:55:10 +0000 | [diff] [blame] | 1767 | " %u\n", dest_tpg->se_tpg_tfo->get_fabric_name(), |
Andy Grover | d2843c1 | 2013-05-16 10:40:55 -0700 | [diff] [blame] | 1768 | dest_node_acl->initiatorname, i_buf, dest_se_deve->mapped_lun); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 1769 | |
| 1770 | if (dest_local_nexus) |
| 1771 | continue; |
| 1772 | |
| 1773 | core_scsi3_lunacl_undepend_item(dest_se_deve); |
| 1774 | core_scsi3_nodeacl_undepend_item(dest_node_acl); |
| 1775 | core_scsi3_tpg_undepend_item(dest_tpg); |
| 1776 | } |
| 1777 | |
| 1778 | return 0; |
Christoph Hellwig | de103c9 | 2012-11-06 12:24:09 -0800 | [diff] [blame] | 1779 | out_unmap: |
Andy Grover | 4949314 | 2012-01-16 16:57:08 -0800 | [diff] [blame] | 1780 | transport_kunmap_data_sg(cmd); |
Christoph Hellwig | de103c9 | 2012-11-06 12:24:09 -0800 | [diff] [blame] | 1781 | out: |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 1782 | /* |
| 1783 | * For the failure case, release everything from tid_dest_list |
| 1784 | * including *dest_pr_reg and the configfs dependances.. |
| 1785 | */ |
| 1786 | list_for_each_entry_safe(tidh, tidh_tmp, &tid_dest_list, dest_list) { |
| 1787 | dest_tpg = tidh->dest_tpg; |
| 1788 | dest_node_acl = tidh->dest_node_acl; |
| 1789 | dest_se_deve = tidh->dest_se_deve; |
| 1790 | dest_pr_reg = tidh->dest_pr_reg; |
| 1791 | dest_local_nexus = tidh->dest_local_nexus; |
| 1792 | |
| 1793 | list_del(&tidh->dest_list); |
| 1794 | kfree(tidh); |
| 1795 | /* |
| 1796 | * Release any extra ALL_TG_PT=1 registrations for |
| 1797 | * the SPEC_I_PT=1 case. |
| 1798 | */ |
| 1799 | list_for_each_entry_safe(pr_reg_tmp, pr_reg_tmp_safe, |
| 1800 | &dest_pr_reg->pr_reg_atp_list, |
| 1801 | pr_reg_atp_mem_list) { |
| 1802 | list_del(&pr_reg_tmp->pr_reg_atp_mem_list); |
| 1803 | core_scsi3_lunacl_undepend_item(pr_reg_tmp->pr_reg_deve); |
| 1804 | kmem_cache_free(t10_pr_reg_cache, pr_reg_tmp); |
| 1805 | } |
| 1806 | |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 1807 | kmem_cache_free(t10_pr_reg_cache, dest_pr_reg); |
| 1808 | |
| 1809 | if (dest_local_nexus) |
| 1810 | continue; |
| 1811 | |
| 1812 | core_scsi3_lunacl_undepend_item(dest_se_deve); |
| 1813 | core_scsi3_nodeacl_undepend_item(dest_node_acl); |
| 1814 | core_scsi3_tpg_undepend_item(dest_tpg); |
| 1815 | } |
| 1816 | return ret; |
| 1817 | } |
| 1818 | |
Andy Grover | 3c8a622 | 2013-05-16 10:40:58 -0700 | [diff] [blame] | 1819 | static int core_scsi3_update_aptpl_buf( |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 1820 | struct se_device *dev, |
| 1821 | unsigned char *buf, |
Andy Grover | 0607dec | 2013-05-16 10:40:57 -0700 | [diff] [blame] | 1822 | u32 pr_aptpl_buf_len) |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 1823 | { |
| 1824 | struct se_lun *lun; |
| 1825 | struct se_portal_group *tpg; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 1826 | struct t10_pr_registration *pr_reg; |
| 1827 | unsigned char tmp[512], isid_buf[32]; |
| 1828 | ssize_t len = 0; |
| 1829 | int reg_count = 0; |
Andy Grover | 3c8a622 | 2013-05-16 10:40:58 -0700 | [diff] [blame] | 1830 | int ret = 0; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 1831 | |
Andy Grover | 3c8a622 | 2013-05-16 10:40:58 -0700 | [diff] [blame] | 1832 | spin_lock(&dev->dev_reservation_lock); |
| 1833 | spin_lock(&dev->t10_pr.registration_lock); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 1834 | /* |
| 1835 | * Walk the registration list.. |
| 1836 | */ |
Christoph Hellwig | 0fd97cc | 2012-10-08 00:03:19 -0400 | [diff] [blame] | 1837 | list_for_each_entry(pr_reg, &dev->t10_pr.registration_list, |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 1838 | pr_reg_list) { |
| 1839 | |
| 1840 | tmp[0] = '\0'; |
| 1841 | isid_buf[0] = '\0'; |
| 1842 | tpg = pr_reg->pr_reg_nacl->se_tpg; |
| 1843 | lun = pr_reg->pr_reg_tg_pt_lun; |
| 1844 | /* |
| 1845 | * Write out any ISID value to APTPL metadata that was included |
| 1846 | * in the original registration. |
| 1847 | */ |
| 1848 | if (pr_reg->isid_present_at_reg) |
| 1849 | snprintf(isid_buf, 32, "initiator_sid=%s\n", |
| 1850 | pr_reg->pr_reg_isid); |
| 1851 | /* |
| 1852 | * Include special metadata if the pr_reg matches the |
| 1853 | * reservation holder. |
| 1854 | */ |
| 1855 | if (dev->dev_pr_res_holder == pr_reg) { |
| 1856 | snprintf(tmp, 512, "PR_REG_START: %d" |
| 1857 | "\ninitiator_fabric=%s\n" |
| 1858 | "initiator_node=%s\n%s" |
| 1859 | "sa_res_key=%llu\n" |
| 1860 | "res_holder=1\nres_type=%02x\n" |
| 1861 | "res_scope=%02x\nres_all_tg_pt=%d\n" |
| 1862 | "mapped_lun=%u\n", reg_count, |
Andy Grover | e3d6f90 | 2011-07-19 08:55:10 +0000 | [diff] [blame] | 1863 | tpg->se_tpg_tfo->get_fabric_name(), |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 1864 | pr_reg->pr_reg_nacl->initiatorname, isid_buf, |
| 1865 | pr_reg->pr_res_key, pr_reg->pr_res_type, |
| 1866 | pr_reg->pr_res_scope, pr_reg->pr_reg_all_tg_pt, |
| 1867 | pr_reg->pr_res_mapped_lun); |
| 1868 | } else { |
| 1869 | snprintf(tmp, 512, "PR_REG_START: %d\n" |
| 1870 | "initiator_fabric=%s\ninitiator_node=%s\n%s" |
| 1871 | "sa_res_key=%llu\nres_holder=0\n" |
| 1872 | "res_all_tg_pt=%d\nmapped_lun=%u\n", |
Andy Grover | e3d6f90 | 2011-07-19 08:55:10 +0000 | [diff] [blame] | 1873 | reg_count, tpg->se_tpg_tfo->get_fabric_name(), |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 1874 | pr_reg->pr_reg_nacl->initiatorname, isid_buf, |
| 1875 | pr_reg->pr_res_key, pr_reg->pr_reg_all_tg_pt, |
| 1876 | pr_reg->pr_res_mapped_lun); |
| 1877 | } |
| 1878 | |
Dan Carpenter | 60d645a | 2011-06-15 10:03:05 -0700 | [diff] [blame] | 1879 | if ((len + strlen(tmp) >= pr_aptpl_buf_len)) { |
Andy Grover | 6708bb2 | 2011-06-08 10:36:43 -0700 | [diff] [blame] | 1880 | pr_err("Unable to update renaming" |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 1881 | " APTPL metadata\n"); |
Andy Grover | 3c8a622 | 2013-05-16 10:40:58 -0700 | [diff] [blame] | 1882 | ret = -EMSGSIZE; |
| 1883 | goto out; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 1884 | } |
| 1885 | len += sprintf(buf+len, "%s", tmp); |
| 1886 | |
| 1887 | /* |
| 1888 | * Include information about the associated SCSI target port. |
| 1889 | */ |
| 1890 | snprintf(tmp, 512, "target_fabric=%s\ntarget_node=%s\n" |
| 1891 | "tpgt=%hu\nport_rtpi=%hu\ntarget_lun=%u\nPR_REG_END:" |
Andy Grover | e3d6f90 | 2011-07-19 08:55:10 +0000 | [diff] [blame] | 1892 | " %d\n", tpg->se_tpg_tfo->get_fabric_name(), |
| 1893 | tpg->se_tpg_tfo->tpg_get_wwn(tpg), |
| 1894 | tpg->se_tpg_tfo->tpg_get_tag(tpg), |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 1895 | lun->lun_sep->sep_rtpi, lun->unpacked_lun, reg_count); |
| 1896 | |
Dan Carpenter | 60d645a | 2011-06-15 10:03:05 -0700 | [diff] [blame] | 1897 | if ((len + strlen(tmp) >= pr_aptpl_buf_len)) { |
Andy Grover | 6708bb2 | 2011-06-08 10:36:43 -0700 | [diff] [blame] | 1898 | pr_err("Unable to update renaming" |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 1899 | " APTPL metadata\n"); |
Andy Grover | 3c8a622 | 2013-05-16 10:40:58 -0700 | [diff] [blame] | 1900 | ret = -EMSGSIZE; |
| 1901 | goto out; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 1902 | } |
| 1903 | len += sprintf(buf+len, "%s", tmp); |
| 1904 | reg_count++; |
| 1905 | } |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 1906 | |
Andy Grover | 6708bb2 | 2011-06-08 10:36:43 -0700 | [diff] [blame] | 1907 | if (!reg_count) |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 1908 | len += sprintf(buf+len, "No Registrations or Reservations"); |
| 1909 | |
Andy Grover | 3c8a622 | 2013-05-16 10:40:58 -0700 | [diff] [blame] | 1910 | out: |
| 1911 | spin_unlock(&dev->t10_pr.registration_lock); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 1912 | spin_unlock(&dev->dev_reservation_lock); |
| 1913 | |
| 1914 | return ret; |
| 1915 | } |
| 1916 | |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 1917 | static int __core_scsi3_write_aptpl_to_file( |
| 1918 | struct se_device *dev, |
Andy Grover | 4dee96f | 2013-05-16 10:41:00 -0700 | [diff] [blame] | 1919 | unsigned char *buf) |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 1920 | { |
Christoph Hellwig | 0fd97cc | 2012-10-08 00:03:19 -0400 | [diff] [blame] | 1921 | struct t10_wwn *wwn = &dev->t10_wwn; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 1922 | struct file *file; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 1923 | int flags = O_RDWR | O_CREAT | O_TRUNC; |
| 1924 | char path[512]; |
Andy Grover | 4dee96f | 2013-05-16 10:41:00 -0700 | [diff] [blame] | 1925 | u32 pr_aptpl_buf_len; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 1926 | int ret; |
| 1927 | |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 1928 | memset(path, 0, 512); |
| 1929 | |
Dan Carpenter | 60d645a | 2011-06-15 10:03:05 -0700 | [diff] [blame] | 1930 | if (strlen(&wwn->unit_serial[0]) >= 512) { |
Andy Grover | 6708bb2 | 2011-06-08 10:36:43 -0700 | [diff] [blame] | 1931 | pr_err("WWN value for struct se_device does not fit" |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 1932 | " into path buffer\n"); |
Andy Grover | e3d6f90 | 2011-07-19 08:55:10 +0000 | [diff] [blame] | 1933 | return -EMSGSIZE; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 1934 | } |
| 1935 | |
| 1936 | snprintf(path, 512, "/var/target/pr/aptpl_%s", &wwn->unit_serial[0]); |
| 1937 | file = filp_open(path, flags, 0600); |
Al Viro | 0e9b10a | 2013-02-23 15:22:43 -0500 | [diff] [blame] | 1938 | if (IS_ERR(file)) { |
Andy Grover | 6708bb2 | 2011-06-08 10:36:43 -0700 | [diff] [blame] | 1939 | pr_err("filp_open(%s) for APTPL metadata" |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 1940 | " failed\n", path); |
Al Viro | 0e9b10a | 2013-02-23 15:22:43 -0500 | [diff] [blame] | 1941 | return PTR_ERR(file); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 1942 | } |
| 1943 | |
Andy Grover | 4dee96f | 2013-05-16 10:41:00 -0700 | [diff] [blame] | 1944 | pr_aptpl_buf_len = (strlen(buf) + 1); /* Add extra for NULL */ |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 1945 | |
Al Viro | 0e9b10a | 2013-02-23 15:22:43 -0500 | [diff] [blame] | 1946 | ret = kernel_write(file, buf, pr_aptpl_buf_len, 0); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 1947 | |
Al Viro | 0e9b10a | 2013-02-23 15:22:43 -0500 | [diff] [blame] | 1948 | if (ret < 0) |
Andy Grover | 6708bb2 | 2011-06-08 10:36:43 -0700 | [diff] [blame] | 1949 | pr_debug("Error writing APTPL metadata file: %s\n", path); |
Al Viro | 0e9b10a | 2013-02-23 15:22:43 -0500 | [diff] [blame] | 1950 | fput(file); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 1951 | |
Al Viro | 0e9b10a | 2013-02-23 15:22:43 -0500 | [diff] [blame] | 1952 | return ret ? -EIO : 0; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 1953 | } |
| 1954 | |
Andy Grover | 459f213 | 2013-05-16 10:41:02 -0700 | [diff] [blame] | 1955 | /* |
| 1956 | * Clear the APTPL metadata if APTPL has been disabled, otherwise |
| 1957 | * write out the updated metadata to struct file for this SCSI device. |
| 1958 | */ |
Nicholas Bellinger | 8a39185 | 2013-06-24 22:18:40 -0700 | [diff] [blame] | 1959 | static sense_reason_t core_scsi3_update_and_write_aptpl(struct se_device *dev, bool aptpl) |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 1960 | { |
Nicholas Bellinger | 8a39185 | 2013-06-24 22:18:40 -0700 | [diff] [blame] | 1961 | unsigned char *buf; |
| 1962 | int rc; |
Christoph Hellwig | de103c9 | 2012-11-06 12:24:09 -0800 | [diff] [blame] | 1963 | |
Andy Grover | 459f213 | 2013-05-16 10:41:02 -0700 | [diff] [blame] | 1964 | if (!aptpl) { |
| 1965 | char *null_buf = "No Registrations or Reservations\n"; |
| 1966 | |
Nicholas Bellinger | 8a39185 | 2013-06-24 22:18:40 -0700 | [diff] [blame] | 1967 | rc = __core_scsi3_write_aptpl_to_file(dev, null_buf); |
Andy Grover | 459f213 | 2013-05-16 10:41:02 -0700 | [diff] [blame] | 1968 | dev->t10_pr.pr_aptpl_active = 0; |
| 1969 | pr_debug("SPC-3 PR: Set APTPL Bit Deactivated\n"); |
Andy Grover | 459f213 | 2013-05-16 10:41:02 -0700 | [diff] [blame] | 1970 | |
Nicholas Bellinger | 8a39185 | 2013-06-24 22:18:40 -0700 | [diff] [blame] | 1971 | if (rc) |
| 1972 | return TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; |
Andy Grover | 459f213 | 2013-05-16 10:41:02 -0700 | [diff] [blame] | 1973 | |
Nicholas Bellinger | 8a39185 | 2013-06-24 22:18:40 -0700 | [diff] [blame] | 1974 | return 0; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 1975 | } |
| 1976 | |
Nicholas Bellinger | 8a39185 | 2013-06-24 22:18:40 -0700 | [diff] [blame] | 1977 | buf = kzalloc(PR_APTPL_BUF_LEN, GFP_KERNEL); |
| 1978 | if (!buf) |
| 1979 | return TCM_OUT_OF_RESOURCES; |
| 1980 | |
| 1981 | rc = core_scsi3_update_aptpl_buf(dev, buf, PR_APTPL_BUF_LEN); |
| 1982 | if (rc < 0) { |
| 1983 | kfree(buf); |
| 1984 | return TCM_OUT_OF_RESOURCES; |
| 1985 | } |
| 1986 | |
| 1987 | rc = __core_scsi3_write_aptpl_to_file(dev, buf); |
| 1988 | if (rc != 0) { |
| 1989 | pr_err("SPC-3 PR: Could not update APTPL\n"); |
| 1990 | kfree(buf); |
| 1991 | return TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; |
| 1992 | } |
| 1993 | dev->t10_pr.pr_aptpl_active = 1; |
| 1994 | kfree(buf); |
| 1995 | pr_debug("SPC-3 PR: Set APTPL Bit Activated\n"); |
| 1996 | return 0; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 1997 | } |
| 1998 | |
Christoph Hellwig | de103c9 | 2012-11-06 12:24:09 -0800 | [diff] [blame] | 1999 | static sense_reason_t |
| 2000 | core_scsi3_emulate_pro_register(struct se_cmd *cmd, u64 res_key, u64 sa_res_key, |
Andy Grover | bc118fe | 2013-05-16 10:41:04 -0700 | [diff] [blame] | 2001 | bool aptpl, bool all_tg_pt, bool spec_i_pt, enum register_type register_type) |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 2002 | { |
Andy Grover | e3d6f90 | 2011-07-19 08:55:10 +0000 | [diff] [blame] | 2003 | struct se_session *se_sess = cmd->se_sess; |
Andy Grover | 5951146d | 2011-07-19 10:26:37 +0000 | [diff] [blame] | 2004 | struct se_device *dev = cmd->se_dev; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 2005 | struct se_dev_entry *se_deve; |
Andy Grover | e3d6f90 | 2011-07-19 08:55:10 +0000 | [diff] [blame] | 2006 | struct se_lun *se_lun = cmd->se_lun; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 2007 | struct se_portal_group *se_tpg; |
Andy Grover | bc118fe | 2013-05-16 10:41:04 -0700 | [diff] [blame] | 2008 | struct t10_pr_registration *pr_reg, *pr_reg_p, *pr_reg_tmp; |
Christoph Hellwig | 0fd97cc | 2012-10-08 00:03:19 -0400 | [diff] [blame] | 2009 | struct t10_reservation *pr_tmpl = &dev->t10_pr; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 2010 | unsigned char isid_buf[PR_REG_ISID_LEN], *isid_ptr = NULL; |
Hannes Reinecke | a0d50f6 | 2012-12-17 09:53:34 +0100 | [diff] [blame] | 2011 | sense_reason_t ret = TCM_NO_SENSE; |
Andy Grover | bc118fe | 2013-05-16 10:41:04 -0700 | [diff] [blame] | 2012 | int pr_holder = 0; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 2013 | |
Andy Grover | 6708bb2 | 2011-06-08 10:36:43 -0700 | [diff] [blame] | 2014 | if (!se_sess || !se_lun) { |
| 2015 | pr_err("SPC-3 PR: se_sess || struct se_lun is NULL!\n"); |
Christoph Hellwig | de103c9 | 2012-11-06 12:24:09 -0800 | [diff] [blame] | 2016 | return TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 2017 | } |
| 2018 | se_tpg = se_sess->se_tpg; |
Jörn Engel | f208324 | 2012-03-15 15:05:40 -0400 | [diff] [blame] | 2019 | se_deve = se_sess->se_node_acl->device_list[cmd->orig_fe_lun]; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 2020 | |
Andy Grover | e3d6f90 | 2011-07-19 08:55:10 +0000 | [diff] [blame] | 2021 | if (se_tpg->se_tpg_tfo->sess_get_initiator_sid) { |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 2022 | memset(&isid_buf[0], 0, PR_REG_ISID_LEN); |
Andy Grover | e3d6f90 | 2011-07-19 08:55:10 +0000 | [diff] [blame] | 2023 | se_tpg->se_tpg_tfo->sess_get_initiator_sid(se_sess, &isid_buf[0], |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 2024 | PR_REG_ISID_LEN); |
| 2025 | isid_ptr = &isid_buf[0]; |
| 2026 | } |
| 2027 | /* |
| 2028 | * Follow logic from spc4r17 Section 5.7.7, Register Behaviors Table 47 |
| 2029 | */ |
Andy Grover | bc118fe | 2013-05-16 10:41:04 -0700 | [diff] [blame] | 2030 | pr_reg = core_scsi3_locate_pr_reg(dev, se_sess->se_node_acl, se_sess); |
| 2031 | if (!pr_reg) { |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 2032 | if (res_key) { |
Andy Grover | 6708bb2 | 2011-06-08 10:36:43 -0700 | [diff] [blame] | 2033 | pr_warn("SPC-3 PR: Reservation Key non-zero" |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 2034 | " for SA REGISTER, returning CONFLICT\n"); |
Christoph Hellwig | de103c9 | 2012-11-06 12:24:09 -0800 | [diff] [blame] | 2035 | return TCM_RESERVATION_CONFLICT; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 2036 | } |
| 2037 | /* |
| 2038 | * Do nothing but return GOOD status. |
| 2039 | */ |
Andy Grover | 6708bb2 | 2011-06-08 10:36:43 -0700 | [diff] [blame] | 2040 | if (!sa_res_key) |
Nicholas Bellinger | 03e98c9 | 2011-11-04 02:36:16 -0700 | [diff] [blame] | 2041 | return 0; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 2042 | |
Andy Grover | 6708bb2 | 2011-06-08 10:36:43 -0700 | [diff] [blame] | 2043 | if (!spec_i_pt) { |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 2044 | /* |
| 2045 | * Perform the Service Action REGISTER on the Initiator |
| 2046 | * Port Endpoint that the PRO was received from on the |
| 2047 | * Logical Unit of the SCSI device server. |
| 2048 | */ |
Christoph Hellwig | de103c9 | 2012-11-06 12:24:09 -0800 | [diff] [blame] | 2049 | if (core_scsi3_alloc_registration(cmd->se_dev, |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 2050 | se_sess->se_node_acl, se_deve, isid_ptr, |
| 2051 | sa_res_key, all_tg_pt, aptpl, |
Andy Grover | 33ce6a8 | 2013-05-16 10:40:54 -0700 | [diff] [blame] | 2052 | register_type, 0)) { |
Andy Grover | 6708bb2 | 2011-06-08 10:36:43 -0700 | [diff] [blame] | 2053 | pr_err("Unable to allocate" |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 2054 | " struct t10_pr_registration\n"); |
Christoph Hellwig | de103c9 | 2012-11-06 12:24:09 -0800 | [diff] [blame] | 2055 | return TCM_INVALID_PARAMETER_LIST; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 2056 | } |
| 2057 | } else { |
| 2058 | /* |
| 2059 | * Register both the Initiator port that received |
| 2060 | * PROUT SA REGISTER + SPEC_I_PT=1 and extract SCSI |
| 2061 | * TransportID from Parameter list and loop through |
| 2062 | * fabric dependent parameter list while calling |
| 2063 | * logic from of core_scsi3_alloc_registration() for |
| 2064 | * each TransportID provided SCSI Initiator Port/Device |
| 2065 | */ |
| 2066 | ret = core_scsi3_decode_spec_i_port(cmd, se_tpg, |
| 2067 | isid_ptr, sa_res_key, all_tg_pt, aptpl); |
| 2068 | if (ret != 0) |
| 2069 | return ret; |
| 2070 | } |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 2071 | |
Andy Grover | 459f213 | 2013-05-16 10:41:02 -0700 | [diff] [blame] | 2072 | return core_scsi3_update_and_write_aptpl(dev, aptpl); |
Christoph Hellwig | de103c9 | 2012-11-06 12:24:09 -0800 | [diff] [blame] | 2073 | } |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 2074 | |
Andy Grover | bc118fe | 2013-05-16 10:41:04 -0700 | [diff] [blame] | 2075 | /* ok, existing registration */ |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 2076 | |
Andy Grover | bc118fe | 2013-05-16 10:41:04 -0700 | [diff] [blame] | 2077 | if ((register_type == REGISTER) && (res_key != pr_reg->pr_res_key)) { |
| 2078 | pr_err("SPC-3 PR REGISTER: Received" |
| 2079 | " res_key: 0x%016Lx does not match" |
| 2080 | " existing SA REGISTER res_key:" |
| 2081 | " 0x%016Lx\n", res_key, |
| 2082 | pr_reg->pr_res_key); |
| 2083 | ret = TCM_RESERVATION_CONFLICT; |
| 2084 | goto out; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 2085 | } |
Christoph Hellwig | de103c9 | 2012-11-06 12:24:09 -0800 | [diff] [blame] | 2086 | |
| 2087 | if (spec_i_pt) { |
Andy Grover | 1f070cc | 2013-05-16 10:40:56 -0700 | [diff] [blame] | 2088 | pr_err("SPC-3 PR REGISTER: SPEC_I_PT" |
| 2089 | " set on a registered nexus\n"); |
Christoph Hellwig | de103c9 | 2012-11-06 12:24:09 -0800 | [diff] [blame] | 2090 | ret = TCM_INVALID_PARAMETER_LIST; |
Andy Grover | bc118fe | 2013-05-16 10:41:04 -0700 | [diff] [blame] | 2091 | goto out; |
Christoph Hellwig | de103c9 | 2012-11-06 12:24:09 -0800 | [diff] [blame] | 2092 | } |
| 2093 | |
| 2094 | /* |
| 2095 | * An existing ALL_TG_PT=1 registration being released |
| 2096 | * must also set ALL_TG_PT=1 in the incoming PROUT. |
| 2097 | */ |
Andy Grover | 1f070cc | 2013-05-16 10:40:56 -0700 | [diff] [blame] | 2098 | if (pr_reg->pr_reg_all_tg_pt && !all_tg_pt) { |
| 2099 | pr_err("SPC-3 PR REGISTER: ALL_TG_PT=1" |
Christoph Hellwig | de103c9 | 2012-11-06 12:24:09 -0800 | [diff] [blame] | 2100 | " registration exists, but ALL_TG_PT=1 bit not" |
| 2101 | " present in received PROUT\n"); |
| 2102 | ret = TCM_INVALID_CDB_FIELD; |
Andy Grover | bc118fe | 2013-05-16 10:41:04 -0700 | [diff] [blame] | 2103 | goto out; |
Christoph Hellwig | de103c9 | 2012-11-06 12:24:09 -0800 | [diff] [blame] | 2104 | } |
| 2105 | |
| 2106 | /* |
Andy Grover | 51d9c41 | 2013-05-16 10:41:03 -0700 | [diff] [blame] | 2107 | * sa_res_key=1 Change Reservation Key for registered I_T Nexus. |
Christoph Hellwig | de103c9 | 2012-11-06 12:24:09 -0800 | [diff] [blame] | 2108 | */ |
Andy Grover | 51d9c41 | 2013-05-16 10:41:03 -0700 | [diff] [blame] | 2109 | if (sa_res_key) { |
| 2110 | /* |
| 2111 | * Increment PRgeneration counter for struct se_device" |
| 2112 | * upon a successful REGISTER, see spc4r17 section 6.3.2 |
| 2113 | * READ_KEYS service action. |
| 2114 | */ |
| 2115 | pr_reg->pr_res_generation = core_scsi3_pr_generation(cmd->se_dev); |
| 2116 | pr_reg->pr_res_key = sa_res_key; |
| 2117 | pr_debug("SPC-3 PR [%s] REGISTER%s: Changed Reservation" |
| 2118 | " Key for %s to: 0x%016Lx PRgeneration:" |
| 2119 | " 0x%08x\n", cmd->se_tfo->get_fabric_name(), |
| 2120 | (register_type == REGISTER_AND_IGNORE_EXISTING_KEY) ? "_AND_IGNORE_EXISTING_KEY" : "", |
| 2121 | pr_reg->pr_reg_nacl->initiatorname, |
| 2122 | pr_reg->pr_res_key, pr_reg->pr_res_generation); |
| 2123 | |
| 2124 | } else { |
| 2125 | /* |
| 2126 | * sa_res_key=0 Unregister Reservation Key for registered I_T Nexus. |
| 2127 | */ |
Christoph Hellwig | de103c9 | 2012-11-06 12:24:09 -0800 | [diff] [blame] | 2128 | pr_holder = core_scsi3_check_implict_release( |
| 2129 | cmd->se_dev, pr_reg); |
| 2130 | if (pr_holder < 0) { |
Christoph Hellwig | de103c9 | 2012-11-06 12:24:09 -0800 | [diff] [blame] | 2131 | ret = TCM_RESERVATION_CONFLICT; |
Andy Grover | bc118fe | 2013-05-16 10:41:04 -0700 | [diff] [blame] | 2132 | goto out; |
Christoph Hellwig | de103c9 | 2012-11-06 12:24:09 -0800 | [diff] [blame] | 2133 | } |
| 2134 | |
| 2135 | spin_lock(&pr_tmpl->registration_lock); |
| 2136 | /* |
| 2137 | * Release all ALL_TG_PT=1 for the matching SCSI Initiator Port |
| 2138 | * and matching pr_res_key. |
| 2139 | */ |
| 2140 | if (pr_reg->pr_reg_all_tg_pt) { |
| 2141 | list_for_each_entry_safe(pr_reg_p, pr_reg_tmp, |
| 2142 | &pr_tmpl->registration_list, |
| 2143 | pr_reg_list) { |
| 2144 | |
| 2145 | if (!pr_reg_p->pr_reg_all_tg_pt) |
| 2146 | continue; |
| 2147 | if (pr_reg_p->pr_res_key != res_key) |
| 2148 | continue; |
| 2149 | if (pr_reg == pr_reg_p) |
| 2150 | continue; |
| 2151 | if (strcmp(pr_reg->pr_reg_nacl->initiatorname, |
| 2152 | pr_reg_p->pr_reg_nacl->initiatorname)) |
| 2153 | continue; |
| 2154 | |
| 2155 | __core_scsi3_free_registration(dev, |
| 2156 | pr_reg_p, NULL, 0); |
| 2157 | } |
| 2158 | } |
| 2159 | |
| 2160 | /* |
| 2161 | * Release the calling I_T Nexus registration now.. |
| 2162 | */ |
| 2163 | __core_scsi3_free_registration(cmd->se_dev, pr_reg, NULL, 1); |
| 2164 | |
| 2165 | /* |
| 2166 | * From spc4r17, section 5.7.11.3 Unregistering |
| 2167 | * |
| 2168 | * If the persistent reservation is a registrants only |
| 2169 | * type, the device server shall establish a unit |
| 2170 | * attention condition for the initiator port associated |
| 2171 | * with every registered I_T nexus except for the I_T |
| 2172 | * nexus on which the PERSISTENT RESERVE OUT command was |
| 2173 | * received, with the additional sense code set to |
| 2174 | * RESERVATIONS RELEASED. |
| 2175 | */ |
| 2176 | if (pr_holder && |
Andy Grover | bc118fe | 2013-05-16 10:41:04 -0700 | [diff] [blame] | 2177 | (pr_reg->pr_res_type == PR_TYPE_WRITE_EXCLUSIVE_REGONLY || |
| 2178 | pr_reg->pr_res_type == PR_TYPE_EXCLUSIVE_ACCESS_REGONLY)) { |
Christoph Hellwig | de103c9 | 2012-11-06 12:24:09 -0800 | [diff] [blame] | 2179 | list_for_each_entry(pr_reg_p, |
| 2180 | &pr_tmpl->registration_list, |
| 2181 | pr_reg_list) { |
| 2182 | |
| 2183 | core_scsi3_ua_allocate( |
| 2184 | pr_reg_p->pr_reg_nacl, |
| 2185 | pr_reg_p->pr_res_mapped_lun, |
| 2186 | 0x2A, |
| 2187 | ASCQ_2AH_RESERVATIONS_RELEASED); |
| 2188 | } |
| 2189 | } |
Andy Grover | 51d9c41 | 2013-05-16 10:41:03 -0700 | [diff] [blame] | 2190 | |
Christoph Hellwig | de103c9 | 2012-11-06 12:24:09 -0800 | [diff] [blame] | 2191 | spin_unlock(&pr_tmpl->registration_lock); |
Christoph Hellwig | de103c9 | 2012-11-06 12:24:09 -0800 | [diff] [blame] | 2192 | } |
| 2193 | |
Andy Grover | 459f213 | 2013-05-16 10:41:02 -0700 | [diff] [blame] | 2194 | ret = core_scsi3_update_and_write_aptpl(dev, aptpl); |
Christoph Hellwig | de103c9 | 2012-11-06 12:24:09 -0800 | [diff] [blame] | 2195 | |
Andy Grover | bc118fe | 2013-05-16 10:41:04 -0700 | [diff] [blame] | 2196 | out: |
Christoph Hellwig | de103c9 | 2012-11-06 12:24:09 -0800 | [diff] [blame] | 2197 | core_scsi3_put_pr_reg(pr_reg); |
| 2198 | return ret; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 2199 | } |
| 2200 | |
| 2201 | unsigned char *core_scsi3_pr_dump_type(int type) |
| 2202 | { |
| 2203 | switch (type) { |
| 2204 | case PR_TYPE_WRITE_EXCLUSIVE: |
| 2205 | return "Write Exclusive Access"; |
| 2206 | case PR_TYPE_EXCLUSIVE_ACCESS: |
| 2207 | return "Exclusive Access"; |
| 2208 | case PR_TYPE_WRITE_EXCLUSIVE_REGONLY: |
| 2209 | return "Write Exclusive Access, Registrants Only"; |
| 2210 | case PR_TYPE_EXCLUSIVE_ACCESS_REGONLY: |
| 2211 | return "Exclusive Access, Registrants Only"; |
| 2212 | case PR_TYPE_WRITE_EXCLUSIVE_ALLREG: |
| 2213 | return "Write Exclusive Access, All Registrants"; |
| 2214 | case PR_TYPE_EXCLUSIVE_ACCESS_ALLREG: |
| 2215 | return "Exclusive Access, All Registrants"; |
| 2216 | default: |
| 2217 | break; |
| 2218 | } |
| 2219 | |
| 2220 | return "Unknown SPC-3 PR Type"; |
| 2221 | } |
| 2222 | |
Christoph Hellwig | de103c9 | 2012-11-06 12:24:09 -0800 | [diff] [blame] | 2223 | static sense_reason_t |
| 2224 | core_scsi3_pro_reserve(struct se_cmd *cmd, int type, int scope, u64 res_key) |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 2225 | { |
Christoph Hellwig | de103c9 | 2012-11-06 12:24:09 -0800 | [diff] [blame] | 2226 | struct se_device *dev = cmd->se_dev; |
Andy Grover | e3d6f90 | 2011-07-19 08:55:10 +0000 | [diff] [blame] | 2227 | struct se_session *se_sess = cmd->se_sess; |
Andy Grover | e3d6f90 | 2011-07-19 08:55:10 +0000 | [diff] [blame] | 2228 | struct se_lun *se_lun = cmd->se_lun; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 2229 | struct t10_pr_registration *pr_reg, *pr_res_holder; |
Christoph Hellwig | 0fd97cc | 2012-10-08 00:03:19 -0400 | [diff] [blame] | 2230 | struct t10_reservation *pr_tmpl = &dev->t10_pr; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 2231 | char i_buf[PR_REG_ISID_ID_LEN]; |
Christoph Hellwig | de103c9 | 2012-11-06 12:24:09 -0800 | [diff] [blame] | 2232 | sense_reason_t ret; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 2233 | |
| 2234 | memset(i_buf, 0, PR_REG_ISID_ID_LEN); |
| 2235 | |
Andy Grover | 6708bb2 | 2011-06-08 10:36:43 -0700 | [diff] [blame] | 2236 | if (!se_sess || !se_lun) { |
| 2237 | pr_err("SPC-3 PR: se_sess || struct se_lun is NULL!\n"); |
Christoph Hellwig | de103c9 | 2012-11-06 12:24:09 -0800 | [diff] [blame] | 2238 | return TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 2239 | } |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 2240 | /* |
| 2241 | * Locate the existing *pr_reg via struct se_node_acl pointers |
| 2242 | */ |
Andy Grover | 5951146d | 2011-07-19 10:26:37 +0000 | [diff] [blame] | 2243 | pr_reg = core_scsi3_locate_pr_reg(cmd->se_dev, se_sess->se_node_acl, |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 2244 | se_sess); |
Andy Grover | 6708bb2 | 2011-06-08 10:36:43 -0700 | [diff] [blame] | 2245 | if (!pr_reg) { |
| 2246 | pr_err("SPC-3 PR: Unable to locate" |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 2247 | " PR_REGISTERED *pr_reg for RESERVE\n"); |
Christoph Hellwig | de103c9 | 2012-11-06 12:24:09 -0800 | [diff] [blame] | 2248 | return TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 2249 | } |
| 2250 | /* |
| 2251 | * From spc4r17 Section 5.7.9: Reserving: |
| 2252 | * |
| 2253 | * An application client creates a persistent reservation by issuing |
| 2254 | * a PERSISTENT RESERVE OUT command with RESERVE service action through |
| 2255 | * a registered I_T nexus with the following parameters: |
| 2256 | * a) RESERVATION KEY set to the value of the reservation key that is |
| 2257 | * registered with the logical unit for the I_T nexus; and |
| 2258 | */ |
| 2259 | if (res_key != pr_reg->pr_res_key) { |
Andy Grover | 6708bb2 | 2011-06-08 10:36:43 -0700 | [diff] [blame] | 2260 | pr_err("SPC-3 PR RESERVE: Received res_key: 0x%016Lx" |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 2261 | " does not match existing SA REGISTER res_key:" |
| 2262 | " 0x%016Lx\n", res_key, pr_reg->pr_res_key); |
Christoph Hellwig | de103c9 | 2012-11-06 12:24:09 -0800 | [diff] [blame] | 2263 | ret = TCM_RESERVATION_CONFLICT; |
| 2264 | goto out_put_pr_reg; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 2265 | } |
| 2266 | /* |
| 2267 | * From spc4r17 Section 5.7.9: Reserving: |
| 2268 | * |
| 2269 | * From above: |
| 2270 | * b) TYPE field and SCOPE field set to the persistent reservation |
| 2271 | * being created. |
| 2272 | * |
| 2273 | * Only one persistent reservation is allowed at a time per logical unit |
| 2274 | * and that persistent reservation has a scope of LU_SCOPE. |
| 2275 | */ |
| 2276 | if (scope != PR_SCOPE_LU_SCOPE) { |
Andy Grover | 6708bb2 | 2011-06-08 10:36:43 -0700 | [diff] [blame] | 2277 | pr_err("SPC-3 PR: Illegal SCOPE: 0x%02x\n", scope); |
Christoph Hellwig | de103c9 | 2012-11-06 12:24:09 -0800 | [diff] [blame] | 2278 | ret = TCM_INVALID_PARAMETER_LIST; |
| 2279 | goto out_put_pr_reg; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 2280 | } |
| 2281 | /* |
| 2282 | * See if we have an existing PR reservation holder pointer at |
| 2283 | * struct se_device->dev_pr_res_holder in the form struct t10_pr_registration |
| 2284 | * *pr_res_holder. |
| 2285 | */ |
| 2286 | spin_lock(&dev->dev_reservation_lock); |
| 2287 | pr_res_holder = dev->dev_pr_res_holder; |
Andy Grover | ee1b1b9 | 2012-07-12 17:34:54 -0700 | [diff] [blame] | 2288 | if (pr_res_holder) { |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 2289 | /* |
| 2290 | * From spc4r17 Section 5.7.9: Reserving: |
| 2291 | * |
| 2292 | * If the device server receives a PERSISTENT RESERVE OUT |
| 2293 | * command from an I_T nexus other than a persistent reservation |
| 2294 | * holder (see 5.7.10) that attempts to create a persistent |
| 2295 | * reservation when a persistent reservation already exists for |
| 2296 | * the logical unit, then the command shall be completed with |
| 2297 | * RESERVATION CONFLICT status. |
| 2298 | */ |
| 2299 | if (pr_res_holder != pr_reg) { |
| 2300 | struct se_node_acl *pr_res_nacl = pr_res_holder->pr_reg_nacl; |
Andy Grover | 6708bb2 | 2011-06-08 10:36:43 -0700 | [diff] [blame] | 2301 | pr_err("SPC-3 PR: Attempted RESERVE from" |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 2302 | " [%s]: %s while reservation already held by" |
| 2303 | " [%s]: %s, returning RESERVATION_CONFLICT\n", |
Andy Grover | e3d6f90 | 2011-07-19 08:55:10 +0000 | [diff] [blame] | 2304 | cmd->se_tfo->get_fabric_name(), |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 2305 | se_sess->se_node_acl->initiatorname, |
Andy Grover | e3d6f90 | 2011-07-19 08:55:10 +0000 | [diff] [blame] | 2306 | pr_res_nacl->se_tpg->se_tpg_tfo->get_fabric_name(), |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 2307 | pr_res_holder->pr_reg_nacl->initiatorname); |
| 2308 | |
| 2309 | spin_unlock(&dev->dev_reservation_lock); |
Christoph Hellwig | de103c9 | 2012-11-06 12:24:09 -0800 | [diff] [blame] | 2310 | ret = TCM_RESERVATION_CONFLICT; |
| 2311 | goto out_put_pr_reg; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 2312 | } |
| 2313 | /* |
| 2314 | * From spc4r17 Section 5.7.9: Reserving: |
| 2315 | * |
| 2316 | * If a persistent reservation holder attempts to modify the |
| 2317 | * type or scope of an existing persistent reservation, the |
| 2318 | * command shall be completed with RESERVATION CONFLICT status. |
| 2319 | */ |
| 2320 | if ((pr_res_holder->pr_res_type != type) || |
| 2321 | (pr_res_holder->pr_res_scope != scope)) { |
| 2322 | struct se_node_acl *pr_res_nacl = pr_res_holder->pr_reg_nacl; |
Andy Grover | 6708bb2 | 2011-06-08 10:36:43 -0700 | [diff] [blame] | 2323 | pr_err("SPC-3 PR: Attempted RESERVE from" |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 2324 | " [%s]: %s trying to change TYPE and/or SCOPE," |
| 2325 | " while reservation already held by [%s]: %s," |
| 2326 | " returning RESERVATION_CONFLICT\n", |
Andy Grover | e3d6f90 | 2011-07-19 08:55:10 +0000 | [diff] [blame] | 2327 | cmd->se_tfo->get_fabric_name(), |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 2328 | se_sess->se_node_acl->initiatorname, |
Andy Grover | e3d6f90 | 2011-07-19 08:55:10 +0000 | [diff] [blame] | 2329 | pr_res_nacl->se_tpg->se_tpg_tfo->get_fabric_name(), |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 2330 | pr_res_holder->pr_reg_nacl->initiatorname); |
| 2331 | |
| 2332 | spin_unlock(&dev->dev_reservation_lock); |
Christoph Hellwig | de103c9 | 2012-11-06 12:24:09 -0800 | [diff] [blame] | 2333 | ret = TCM_RESERVATION_CONFLICT; |
| 2334 | goto out_put_pr_reg; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 2335 | } |
| 2336 | /* |
| 2337 | * From spc4r17 Section 5.7.9: Reserving: |
| 2338 | * |
| 2339 | * If the device server receives a PERSISTENT RESERVE OUT |
| 2340 | * command with RESERVE service action where the TYPE field and |
| 2341 | * the SCOPE field contain the same values as the existing type |
| 2342 | * and scope from a persistent reservation holder, it shall not |
| 2343 | * make any change to the existing persistent reservation and |
| 2344 | * shall completethe command with GOOD status. |
| 2345 | */ |
| 2346 | spin_unlock(&dev->dev_reservation_lock); |
Christoph Hellwig | de103c9 | 2012-11-06 12:24:09 -0800 | [diff] [blame] | 2347 | ret = 0; |
| 2348 | goto out_put_pr_reg; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 2349 | } |
| 2350 | /* |
| 2351 | * Otherwise, our *pr_reg becomes the PR reservation holder for said |
| 2352 | * TYPE/SCOPE. Also set the received scope and type in *pr_reg. |
| 2353 | */ |
| 2354 | pr_reg->pr_res_scope = scope; |
| 2355 | pr_reg->pr_res_type = type; |
| 2356 | pr_reg->pr_res_holder = 1; |
| 2357 | dev->dev_pr_res_holder = pr_reg; |
Andy Grover | d2843c1 | 2013-05-16 10:40:55 -0700 | [diff] [blame] | 2358 | core_pr_dump_initiator_port(pr_reg, i_buf, PR_REG_ISID_ID_LEN); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 2359 | |
Andy Grover | 6708bb2 | 2011-06-08 10:36:43 -0700 | [diff] [blame] | 2360 | pr_debug("SPC-3 PR [%s] Service Action: RESERVE created new" |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 2361 | " reservation holder TYPE: %s ALL_TG_PT: %d\n", |
Andy Grover | e3d6f90 | 2011-07-19 08:55:10 +0000 | [diff] [blame] | 2362 | cmd->se_tfo->get_fabric_name(), core_scsi3_pr_dump_type(type), |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 2363 | (pr_reg->pr_reg_all_tg_pt) ? 1 : 0); |
Andy Grover | 6708bb2 | 2011-06-08 10:36:43 -0700 | [diff] [blame] | 2364 | pr_debug("SPC-3 PR [%s] RESERVE Node: %s%s\n", |
Andy Grover | e3d6f90 | 2011-07-19 08:55:10 +0000 | [diff] [blame] | 2365 | cmd->se_tfo->get_fabric_name(), |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 2366 | se_sess->se_node_acl->initiatorname, |
Andy Grover | d2843c1 | 2013-05-16 10:40:55 -0700 | [diff] [blame] | 2367 | i_buf); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 2368 | spin_unlock(&dev->dev_reservation_lock); |
| 2369 | |
Andy Grover | 459f213 | 2013-05-16 10:41:02 -0700 | [diff] [blame] | 2370 | if (pr_tmpl->pr_aptpl_active) |
| 2371 | core_scsi3_update_and_write_aptpl(cmd->se_dev, true); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 2372 | |
Christoph Hellwig | de103c9 | 2012-11-06 12:24:09 -0800 | [diff] [blame] | 2373 | ret = 0; |
| 2374 | out_put_pr_reg: |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 2375 | core_scsi3_put_pr_reg(pr_reg); |
Christoph Hellwig | de103c9 | 2012-11-06 12:24:09 -0800 | [diff] [blame] | 2376 | return ret; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 2377 | } |
| 2378 | |
Christoph Hellwig | de103c9 | 2012-11-06 12:24:09 -0800 | [diff] [blame] | 2379 | static sense_reason_t |
| 2380 | core_scsi3_emulate_pro_reserve(struct se_cmd *cmd, int type, int scope, |
| 2381 | u64 res_key) |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 2382 | { |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 2383 | switch (type) { |
| 2384 | case PR_TYPE_WRITE_EXCLUSIVE: |
| 2385 | case PR_TYPE_EXCLUSIVE_ACCESS: |
| 2386 | case PR_TYPE_WRITE_EXCLUSIVE_REGONLY: |
| 2387 | case PR_TYPE_EXCLUSIVE_ACCESS_REGONLY: |
| 2388 | case PR_TYPE_WRITE_EXCLUSIVE_ALLREG: |
| 2389 | case PR_TYPE_EXCLUSIVE_ACCESS_ALLREG: |
Christoph Hellwig | de103c9 | 2012-11-06 12:24:09 -0800 | [diff] [blame] | 2390 | return core_scsi3_pro_reserve(cmd, type, scope, res_key); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 2391 | default: |
Andy Grover | 6708bb2 | 2011-06-08 10:36:43 -0700 | [diff] [blame] | 2392 | pr_err("SPC-3 PR: Unknown Service Action RESERVE Type:" |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 2393 | " 0x%02x\n", type); |
Christoph Hellwig | de103c9 | 2012-11-06 12:24:09 -0800 | [diff] [blame] | 2394 | return TCM_INVALID_CDB_FIELD; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 2395 | } |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 2396 | } |
| 2397 | |
| 2398 | /* |
| 2399 | * Called with struct se_device->dev_reservation_lock held. |
| 2400 | */ |
| 2401 | static void __core_scsi3_complete_pro_release( |
| 2402 | struct se_device *dev, |
| 2403 | struct se_node_acl *se_nacl, |
| 2404 | struct t10_pr_registration *pr_reg, |
| 2405 | int explict) |
| 2406 | { |
| 2407 | struct target_core_fabric_ops *tfo = se_nacl->se_tpg->se_tpg_tfo; |
| 2408 | char i_buf[PR_REG_ISID_ID_LEN]; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 2409 | |
| 2410 | memset(i_buf, 0, PR_REG_ISID_ID_LEN); |
Andy Grover | d2843c1 | 2013-05-16 10:40:55 -0700 | [diff] [blame] | 2411 | core_pr_dump_initiator_port(pr_reg, i_buf, PR_REG_ISID_ID_LEN); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 2412 | /* |
| 2413 | * Go ahead and release the current PR reservation holder. |
| 2414 | */ |
| 2415 | dev->dev_pr_res_holder = NULL; |
| 2416 | |
Andy Grover | 6708bb2 | 2011-06-08 10:36:43 -0700 | [diff] [blame] | 2417 | pr_debug("SPC-3 PR [%s] Service Action: %s RELEASE cleared" |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 2418 | " reservation holder TYPE: %s ALL_TG_PT: %d\n", |
| 2419 | tfo->get_fabric_name(), (explict) ? "explict" : "implict", |
| 2420 | core_scsi3_pr_dump_type(pr_reg->pr_res_type), |
| 2421 | (pr_reg->pr_reg_all_tg_pt) ? 1 : 0); |
Andy Grover | 6708bb2 | 2011-06-08 10:36:43 -0700 | [diff] [blame] | 2422 | pr_debug("SPC-3 PR [%s] RELEASE Node: %s%s\n", |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 2423 | tfo->get_fabric_name(), se_nacl->initiatorname, |
Andy Grover | d2843c1 | 2013-05-16 10:40:55 -0700 | [diff] [blame] | 2424 | i_buf); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 2425 | /* |
| 2426 | * Clear TYPE and SCOPE for the next PROUT Service Action: RESERVE |
| 2427 | */ |
| 2428 | pr_reg->pr_res_holder = pr_reg->pr_res_type = pr_reg->pr_res_scope = 0; |
| 2429 | } |
| 2430 | |
Christoph Hellwig | de103c9 | 2012-11-06 12:24:09 -0800 | [diff] [blame] | 2431 | static sense_reason_t |
| 2432 | core_scsi3_emulate_pro_release(struct se_cmd *cmd, int type, int scope, |
| 2433 | u64 res_key) |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 2434 | { |
| 2435 | struct se_device *dev = cmd->se_dev; |
Andy Grover | e3d6f90 | 2011-07-19 08:55:10 +0000 | [diff] [blame] | 2436 | struct se_session *se_sess = cmd->se_sess; |
| 2437 | struct se_lun *se_lun = cmd->se_lun; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 2438 | struct t10_pr_registration *pr_reg, *pr_reg_p, *pr_res_holder; |
Christoph Hellwig | 0fd97cc | 2012-10-08 00:03:19 -0400 | [diff] [blame] | 2439 | struct t10_reservation *pr_tmpl = &dev->t10_pr; |
Christoph Hellwig | de103c9 | 2012-11-06 12:24:09 -0800 | [diff] [blame] | 2440 | int all_reg = 0; |
| 2441 | sense_reason_t ret = 0; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 2442 | |
Andy Grover | 6708bb2 | 2011-06-08 10:36:43 -0700 | [diff] [blame] | 2443 | if (!se_sess || !se_lun) { |
| 2444 | pr_err("SPC-3 PR: se_sess || struct se_lun is NULL!\n"); |
Christoph Hellwig | de103c9 | 2012-11-06 12:24:09 -0800 | [diff] [blame] | 2445 | return TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 2446 | } |
| 2447 | /* |
| 2448 | * Locate the existing *pr_reg via struct se_node_acl pointers |
| 2449 | */ |
| 2450 | pr_reg = core_scsi3_locate_pr_reg(dev, se_sess->se_node_acl, se_sess); |
Andy Grover | 6708bb2 | 2011-06-08 10:36:43 -0700 | [diff] [blame] | 2451 | if (!pr_reg) { |
| 2452 | pr_err("SPC-3 PR: Unable to locate" |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 2453 | " PR_REGISTERED *pr_reg for RELEASE\n"); |
Christoph Hellwig | de103c9 | 2012-11-06 12:24:09 -0800 | [diff] [blame] | 2454 | return TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 2455 | } |
| 2456 | /* |
| 2457 | * From spc4r17 Section 5.7.11.2 Releasing: |
| 2458 | * |
| 2459 | * If there is no persistent reservation or in response to a persistent |
| 2460 | * reservation release request from a registered I_T nexus that is not a |
| 2461 | * persistent reservation holder (see 5.7.10), the device server shall |
| 2462 | * do the following: |
| 2463 | * |
| 2464 | * a) Not release the persistent reservation, if any; |
| 2465 | * b) Not remove any registrations; and |
| 2466 | * c) Complete the command with GOOD status. |
| 2467 | */ |
| 2468 | spin_lock(&dev->dev_reservation_lock); |
| 2469 | pr_res_holder = dev->dev_pr_res_holder; |
Andy Grover | 6708bb2 | 2011-06-08 10:36:43 -0700 | [diff] [blame] | 2470 | if (!pr_res_holder) { |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 2471 | /* |
| 2472 | * No persistent reservation, return GOOD status. |
| 2473 | */ |
| 2474 | spin_unlock(&dev->dev_reservation_lock); |
Nicholas Bellinger | bb7a8c8 | 2012-11-06 15:46:25 -0800 | [diff] [blame] | 2475 | goto out_put_pr_reg; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 2476 | } |
| 2477 | if ((pr_res_holder->pr_res_type == PR_TYPE_WRITE_EXCLUSIVE_ALLREG) || |
| 2478 | (pr_res_holder->pr_res_type == PR_TYPE_EXCLUSIVE_ACCESS_ALLREG)) |
| 2479 | all_reg = 1; |
| 2480 | |
| 2481 | if ((all_reg == 0) && (pr_res_holder != pr_reg)) { |
| 2482 | /* |
| 2483 | * Non 'All Registrants' PR Type cases.. |
| 2484 | * Release request from a registered I_T nexus that is not a |
| 2485 | * persistent reservation holder. return GOOD status. |
| 2486 | */ |
| 2487 | spin_unlock(&dev->dev_reservation_lock); |
Christoph Hellwig | de103c9 | 2012-11-06 12:24:09 -0800 | [diff] [blame] | 2488 | goto out_put_pr_reg; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 2489 | } |
Christoph Hellwig | de103c9 | 2012-11-06 12:24:09 -0800 | [diff] [blame] | 2490 | |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 2491 | /* |
| 2492 | * From spc4r17 Section 5.7.11.2 Releasing: |
| 2493 | * |
| 2494 | * Only the persistent reservation holder (see 5.7.10) is allowed to |
| 2495 | * release a persistent reservation. |
| 2496 | * |
| 2497 | * An application client releases the persistent reservation by issuing |
| 2498 | * a PERSISTENT RESERVE OUT command with RELEASE service action through |
| 2499 | * an I_T nexus that is a persistent reservation holder with the |
| 2500 | * following parameters: |
| 2501 | * |
| 2502 | * a) RESERVATION KEY field set to the value of the reservation key |
| 2503 | * that is registered with the logical unit for the I_T nexus; |
| 2504 | */ |
| 2505 | if (res_key != pr_reg->pr_res_key) { |
Andy Grover | 6708bb2 | 2011-06-08 10:36:43 -0700 | [diff] [blame] | 2506 | pr_err("SPC-3 PR RELEASE: Received res_key: 0x%016Lx" |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 2507 | " does not match existing SA REGISTER res_key:" |
| 2508 | " 0x%016Lx\n", res_key, pr_reg->pr_res_key); |
| 2509 | spin_unlock(&dev->dev_reservation_lock); |
Christoph Hellwig | de103c9 | 2012-11-06 12:24:09 -0800 | [diff] [blame] | 2510 | ret = TCM_RESERVATION_CONFLICT; |
| 2511 | goto out_put_pr_reg; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 2512 | } |
| 2513 | /* |
| 2514 | * From spc4r17 Section 5.7.11.2 Releasing and above: |
| 2515 | * |
| 2516 | * b) TYPE field and SCOPE field set to match the persistent |
| 2517 | * reservation being released. |
| 2518 | */ |
| 2519 | if ((pr_res_holder->pr_res_type != type) || |
| 2520 | (pr_res_holder->pr_res_scope != scope)) { |
| 2521 | struct se_node_acl *pr_res_nacl = pr_res_holder->pr_reg_nacl; |
Andy Grover | 6708bb2 | 2011-06-08 10:36:43 -0700 | [diff] [blame] | 2522 | pr_err("SPC-3 PR RELEASE: Attempted to release" |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 2523 | " reservation from [%s]: %s with different TYPE " |
| 2524 | "and/or SCOPE while reservation already held by" |
| 2525 | " [%s]: %s, returning RESERVATION_CONFLICT\n", |
Andy Grover | e3d6f90 | 2011-07-19 08:55:10 +0000 | [diff] [blame] | 2526 | cmd->se_tfo->get_fabric_name(), |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 2527 | se_sess->se_node_acl->initiatorname, |
Andy Grover | e3d6f90 | 2011-07-19 08:55:10 +0000 | [diff] [blame] | 2528 | pr_res_nacl->se_tpg->se_tpg_tfo->get_fabric_name(), |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 2529 | pr_res_holder->pr_reg_nacl->initiatorname); |
| 2530 | |
| 2531 | spin_unlock(&dev->dev_reservation_lock); |
Christoph Hellwig | de103c9 | 2012-11-06 12:24:09 -0800 | [diff] [blame] | 2532 | ret = TCM_RESERVATION_CONFLICT; |
| 2533 | goto out_put_pr_reg; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 2534 | } |
| 2535 | /* |
| 2536 | * In response to a persistent reservation release request from the |
| 2537 | * persistent reservation holder the device server shall perform a |
| 2538 | * release by doing the following as an uninterrupted series of actions: |
| 2539 | * a) Release the persistent reservation; |
| 2540 | * b) Not remove any registration(s); |
| 2541 | * c) If the released persistent reservation is a registrants only type |
| 2542 | * or all registrants type persistent reservation, |
| 2543 | * the device server shall establish a unit attention condition for |
| 2544 | * the initiator port associated with every regis- |
| 2545 | * tered I_T nexus other than I_T nexus on which the PERSISTENT |
| 2546 | * RESERVE OUT command with RELEASE service action was received, |
| 2547 | * with the additional sense code set to RESERVATIONS RELEASED; and |
| 2548 | * d) If the persistent reservation is of any other type, the device |
| 2549 | * server shall not establish a unit attention condition. |
| 2550 | */ |
| 2551 | __core_scsi3_complete_pro_release(dev, se_sess->se_node_acl, |
| 2552 | pr_reg, 1); |
| 2553 | |
| 2554 | spin_unlock(&dev->dev_reservation_lock); |
| 2555 | |
| 2556 | if ((type != PR_TYPE_WRITE_EXCLUSIVE_REGONLY) && |
| 2557 | (type != PR_TYPE_EXCLUSIVE_ACCESS_REGONLY) && |
| 2558 | (type != PR_TYPE_WRITE_EXCLUSIVE_ALLREG) && |
| 2559 | (type != PR_TYPE_EXCLUSIVE_ACCESS_ALLREG)) { |
| 2560 | /* |
| 2561 | * If no UNIT ATTENTION conditions will be established for |
| 2562 | * PR_TYPE_WRITE_EXCLUSIVE or PR_TYPE_EXCLUSIVE_ACCESS |
| 2563 | * go ahead and check for APTPL=1 update+write below |
| 2564 | */ |
| 2565 | goto write_aptpl; |
| 2566 | } |
| 2567 | |
| 2568 | spin_lock(&pr_tmpl->registration_lock); |
| 2569 | list_for_each_entry(pr_reg_p, &pr_tmpl->registration_list, |
| 2570 | pr_reg_list) { |
| 2571 | /* |
| 2572 | * Do not establish a UNIT ATTENTION condition |
| 2573 | * for the calling I_T Nexus |
| 2574 | */ |
| 2575 | if (pr_reg_p == pr_reg) |
| 2576 | continue; |
| 2577 | |
| 2578 | core_scsi3_ua_allocate(pr_reg_p->pr_reg_nacl, |
| 2579 | pr_reg_p->pr_res_mapped_lun, |
| 2580 | 0x2A, ASCQ_2AH_RESERVATIONS_RELEASED); |
| 2581 | } |
| 2582 | spin_unlock(&pr_tmpl->registration_lock); |
| 2583 | |
| 2584 | write_aptpl: |
Andy Grover | 459f213 | 2013-05-16 10:41:02 -0700 | [diff] [blame] | 2585 | if (pr_tmpl->pr_aptpl_active) |
| 2586 | core_scsi3_update_and_write_aptpl(cmd->se_dev, true); |
| 2587 | |
Christoph Hellwig | de103c9 | 2012-11-06 12:24:09 -0800 | [diff] [blame] | 2588 | out_put_pr_reg: |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 2589 | core_scsi3_put_pr_reg(pr_reg); |
Christoph Hellwig | de103c9 | 2012-11-06 12:24:09 -0800 | [diff] [blame] | 2590 | return ret; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 2591 | } |
| 2592 | |
Christoph Hellwig | de103c9 | 2012-11-06 12:24:09 -0800 | [diff] [blame] | 2593 | static sense_reason_t |
| 2594 | core_scsi3_emulate_pro_clear(struct se_cmd *cmd, u64 res_key) |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 2595 | { |
| 2596 | struct se_device *dev = cmd->se_dev; |
| 2597 | struct se_node_acl *pr_reg_nacl; |
Andy Grover | e3d6f90 | 2011-07-19 08:55:10 +0000 | [diff] [blame] | 2598 | struct se_session *se_sess = cmd->se_sess; |
Christoph Hellwig | 0fd97cc | 2012-10-08 00:03:19 -0400 | [diff] [blame] | 2599 | struct t10_reservation *pr_tmpl = &dev->t10_pr; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 2600 | struct t10_pr_registration *pr_reg, *pr_reg_tmp, *pr_reg_n, *pr_res_holder; |
| 2601 | u32 pr_res_mapped_lun = 0; |
| 2602 | int calling_it_nexus = 0; |
| 2603 | /* |
| 2604 | * Locate the existing *pr_reg via struct se_node_acl pointers |
| 2605 | */ |
Andy Grover | 5951146d | 2011-07-19 10:26:37 +0000 | [diff] [blame] | 2606 | pr_reg_n = core_scsi3_locate_pr_reg(cmd->se_dev, |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 2607 | se_sess->se_node_acl, se_sess); |
Andy Grover | 6708bb2 | 2011-06-08 10:36:43 -0700 | [diff] [blame] | 2608 | if (!pr_reg_n) { |
| 2609 | pr_err("SPC-3 PR: Unable to locate" |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 2610 | " PR_REGISTERED *pr_reg for CLEAR\n"); |
Christoph Hellwig | de103c9 | 2012-11-06 12:24:09 -0800 | [diff] [blame] | 2611 | return TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 2612 | } |
| 2613 | /* |
| 2614 | * From spc4r17 section 5.7.11.6, Clearing: |
| 2615 | * |
| 2616 | * Any application client may release the persistent reservation and |
| 2617 | * remove all registrations from a device server by issuing a |
| 2618 | * PERSISTENT RESERVE OUT command with CLEAR service action through a |
| 2619 | * registered I_T nexus with the following parameter: |
| 2620 | * |
| 2621 | * a) RESERVATION KEY field set to the value of the reservation key |
| 2622 | * that is registered with the logical unit for the I_T nexus. |
| 2623 | */ |
| 2624 | if (res_key != pr_reg_n->pr_res_key) { |
Andy Grover | 6708bb2 | 2011-06-08 10:36:43 -0700 | [diff] [blame] | 2625 | pr_err("SPC-3 PR REGISTER: Received" |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 2626 | " res_key: 0x%016Lx does not match" |
| 2627 | " existing SA REGISTER res_key:" |
| 2628 | " 0x%016Lx\n", res_key, pr_reg_n->pr_res_key); |
| 2629 | core_scsi3_put_pr_reg(pr_reg_n); |
Christoph Hellwig | de103c9 | 2012-11-06 12:24:09 -0800 | [diff] [blame] | 2630 | return TCM_RESERVATION_CONFLICT; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 2631 | } |
| 2632 | /* |
| 2633 | * a) Release the persistent reservation, if any; |
| 2634 | */ |
| 2635 | spin_lock(&dev->dev_reservation_lock); |
| 2636 | pr_res_holder = dev->dev_pr_res_holder; |
| 2637 | if (pr_res_holder) { |
| 2638 | struct se_node_acl *pr_res_nacl = pr_res_holder->pr_reg_nacl; |
| 2639 | __core_scsi3_complete_pro_release(dev, pr_res_nacl, |
| 2640 | pr_res_holder, 0); |
| 2641 | } |
| 2642 | spin_unlock(&dev->dev_reservation_lock); |
| 2643 | /* |
| 2644 | * b) Remove all registration(s) (see spc4r17 5.7.7); |
| 2645 | */ |
| 2646 | spin_lock(&pr_tmpl->registration_lock); |
| 2647 | list_for_each_entry_safe(pr_reg, pr_reg_tmp, |
| 2648 | &pr_tmpl->registration_list, pr_reg_list) { |
| 2649 | |
| 2650 | calling_it_nexus = (pr_reg_n == pr_reg) ? 1 : 0; |
| 2651 | pr_reg_nacl = pr_reg->pr_reg_nacl; |
| 2652 | pr_res_mapped_lun = pr_reg->pr_res_mapped_lun; |
| 2653 | __core_scsi3_free_registration(dev, pr_reg, NULL, |
| 2654 | calling_it_nexus); |
| 2655 | /* |
| 2656 | * e) Establish a unit attention condition for the initiator |
| 2657 | * port associated with every registered I_T nexus other |
| 2658 | * than the I_T nexus on which the PERSISTENT RESERVE OUT |
| 2659 | * command with CLEAR service action was received, with the |
| 2660 | * additional sense code set to RESERVATIONS PREEMPTED. |
| 2661 | */ |
Andy Grover | 6708bb2 | 2011-06-08 10:36:43 -0700 | [diff] [blame] | 2662 | if (!calling_it_nexus) |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 2663 | core_scsi3_ua_allocate(pr_reg_nacl, pr_res_mapped_lun, |
| 2664 | 0x2A, ASCQ_2AH_RESERVATIONS_PREEMPTED); |
| 2665 | } |
| 2666 | spin_unlock(&pr_tmpl->registration_lock); |
| 2667 | |
Andy Grover | 6708bb2 | 2011-06-08 10:36:43 -0700 | [diff] [blame] | 2668 | pr_debug("SPC-3 PR [%s] Service Action: CLEAR complete\n", |
Andy Grover | e3d6f90 | 2011-07-19 08:55:10 +0000 | [diff] [blame] | 2669 | cmd->se_tfo->get_fabric_name()); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 2670 | |
Andy Grover | 459f213 | 2013-05-16 10:41:02 -0700 | [diff] [blame] | 2671 | core_scsi3_update_and_write_aptpl(cmd->se_dev, false); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 2672 | |
| 2673 | core_scsi3_pr_generation(dev); |
| 2674 | return 0; |
| 2675 | } |
| 2676 | |
| 2677 | /* |
| 2678 | * Called with struct se_device->dev_reservation_lock held. |
| 2679 | */ |
| 2680 | static void __core_scsi3_complete_pro_preempt( |
| 2681 | struct se_device *dev, |
| 2682 | struct t10_pr_registration *pr_reg, |
| 2683 | struct list_head *preempt_and_abort_list, |
| 2684 | int type, |
| 2685 | int scope, |
Andy Grover | 33ce6a8 | 2013-05-16 10:40:54 -0700 | [diff] [blame] | 2686 | enum preempt_type preempt_type) |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 2687 | { |
| 2688 | struct se_node_acl *nacl = pr_reg->pr_reg_nacl; |
| 2689 | struct target_core_fabric_ops *tfo = nacl->se_tpg->se_tpg_tfo; |
| 2690 | char i_buf[PR_REG_ISID_ID_LEN]; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 2691 | |
| 2692 | memset(i_buf, 0, PR_REG_ISID_ID_LEN); |
Andy Grover | d2843c1 | 2013-05-16 10:40:55 -0700 | [diff] [blame] | 2693 | core_pr_dump_initiator_port(pr_reg, i_buf, PR_REG_ISID_ID_LEN); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 2694 | /* |
| 2695 | * Do an implict RELEASE of the existing reservation. |
| 2696 | */ |
| 2697 | if (dev->dev_pr_res_holder) |
| 2698 | __core_scsi3_complete_pro_release(dev, nacl, |
| 2699 | dev->dev_pr_res_holder, 0); |
| 2700 | |
| 2701 | dev->dev_pr_res_holder = pr_reg; |
| 2702 | pr_reg->pr_res_holder = 1; |
| 2703 | pr_reg->pr_res_type = type; |
| 2704 | pr_reg->pr_res_scope = scope; |
| 2705 | |
Andy Grover | 6708bb2 | 2011-06-08 10:36:43 -0700 | [diff] [blame] | 2706 | pr_debug("SPC-3 PR [%s] Service Action: PREEMPT%s created new" |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 2707 | " reservation holder TYPE: %s ALL_TG_PT: %d\n", |
Andy Grover | 33ce6a8 | 2013-05-16 10:40:54 -0700 | [diff] [blame] | 2708 | tfo->get_fabric_name(), (preempt_type == PREEMPT_AND_ABORT) ? "_AND_ABORT" : "", |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 2709 | core_scsi3_pr_dump_type(type), |
| 2710 | (pr_reg->pr_reg_all_tg_pt) ? 1 : 0); |
Andy Grover | 6708bb2 | 2011-06-08 10:36:43 -0700 | [diff] [blame] | 2711 | pr_debug("SPC-3 PR [%s] PREEMPT%s from Node: %s%s\n", |
Andy Grover | 33ce6a8 | 2013-05-16 10:40:54 -0700 | [diff] [blame] | 2712 | tfo->get_fabric_name(), (preempt_type == PREEMPT_AND_ABORT) ? "_AND_ABORT" : "", |
Andy Grover | d2843c1 | 2013-05-16 10:40:55 -0700 | [diff] [blame] | 2713 | nacl->initiatorname, i_buf); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 2714 | /* |
| 2715 | * For PREEMPT_AND_ABORT, add the preempting reservation's |
| 2716 | * struct t10_pr_registration to the list that will be compared |
| 2717 | * against received CDBs.. |
| 2718 | */ |
| 2719 | if (preempt_and_abort_list) |
| 2720 | list_add_tail(&pr_reg->pr_reg_abort_list, |
| 2721 | preempt_and_abort_list); |
| 2722 | } |
| 2723 | |
| 2724 | static void core_scsi3_release_preempt_and_abort( |
| 2725 | struct list_head *preempt_and_abort_list, |
| 2726 | struct t10_pr_registration *pr_reg_holder) |
| 2727 | { |
| 2728 | struct t10_pr_registration *pr_reg, *pr_reg_tmp; |
| 2729 | |
| 2730 | list_for_each_entry_safe(pr_reg, pr_reg_tmp, preempt_and_abort_list, |
| 2731 | pr_reg_abort_list) { |
| 2732 | |
| 2733 | list_del(&pr_reg->pr_reg_abort_list); |
| 2734 | if (pr_reg_holder == pr_reg) |
| 2735 | continue; |
| 2736 | if (pr_reg->pr_res_holder) { |
Andy Grover | 6708bb2 | 2011-06-08 10:36:43 -0700 | [diff] [blame] | 2737 | pr_warn("pr_reg->pr_res_holder still set\n"); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 2738 | continue; |
| 2739 | } |
| 2740 | |
| 2741 | pr_reg->pr_reg_deve = NULL; |
| 2742 | pr_reg->pr_reg_nacl = NULL; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 2743 | kmem_cache_free(t10_pr_reg_cache, pr_reg); |
| 2744 | } |
| 2745 | } |
| 2746 | |
Christoph Hellwig | de103c9 | 2012-11-06 12:24:09 -0800 | [diff] [blame] | 2747 | static sense_reason_t |
| 2748 | core_scsi3_pro_preempt(struct se_cmd *cmd, int type, int scope, u64 res_key, |
Andy Grover | 33ce6a8 | 2013-05-16 10:40:54 -0700 | [diff] [blame] | 2749 | u64 sa_res_key, enum preempt_type preempt_type) |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 2750 | { |
Andy Grover | 5951146d | 2011-07-19 10:26:37 +0000 | [diff] [blame] | 2751 | struct se_device *dev = cmd->se_dev; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 2752 | struct se_node_acl *pr_reg_nacl; |
Andy Grover | e3d6f90 | 2011-07-19 08:55:10 +0000 | [diff] [blame] | 2753 | struct se_session *se_sess = cmd->se_sess; |
Roland Dreier | d0f474e | 2012-01-12 10:41:18 -0800 | [diff] [blame] | 2754 | LIST_HEAD(preempt_and_abort_list); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 2755 | struct t10_pr_registration *pr_reg, *pr_reg_tmp, *pr_reg_n, *pr_res_holder; |
Christoph Hellwig | 0fd97cc | 2012-10-08 00:03:19 -0400 | [diff] [blame] | 2756 | struct t10_reservation *pr_tmpl = &dev->t10_pr; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 2757 | u32 pr_res_mapped_lun = 0; |
| 2758 | int all_reg = 0, calling_it_nexus = 0, released_regs = 0; |
Christoph Hellwig | de103c9 | 2012-11-06 12:24:09 -0800 | [diff] [blame] | 2759 | int prh_type = 0, prh_scope = 0; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 2760 | |
Christoph Hellwig | de103c9 | 2012-11-06 12:24:09 -0800 | [diff] [blame] | 2761 | if (!se_sess) |
| 2762 | return TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 2763 | |
Andy Grover | 5951146d | 2011-07-19 10:26:37 +0000 | [diff] [blame] | 2764 | pr_reg_n = core_scsi3_locate_pr_reg(cmd->se_dev, se_sess->se_node_acl, |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 2765 | se_sess); |
Andy Grover | 6708bb2 | 2011-06-08 10:36:43 -0700 | [diff] [blame] | 2766 | if (!pr_reg_n) { |
| 2767 | pr_err("SPC-3 PR: Unable to locate" |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 2768 | " PR_REGISTERED *pr_reg for PREEMPT%s\n", |
Andy Grover | 33ce6a8 | 2013-05-16 10:40:54 -0700 | [diff] [blame] | 2769 | (preempt_type == PREEMPT_AND_ABORT) ? "_AND_ABORT" : ""); |
Christoph Hellwig | de103c9 | 2012-11-06 12:24:09 -0800 | [diff] [blame] | 2770 | return TCM_RESERVATION_CONFLICT; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 2771 | } |
| 2772 | if (pr_reg_n->pr_res_key != res_key) { |
| 2773 | core_scsi3_put_pr_reg(pr_reg_n); |
Christoph Hellwig | de103c9 | 2012-11-06 12:24:09 -0800 | [diff] [blame] | 2774 | return TCM_RESERVATION_CONFLICT; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 2775 | } |
| 2776 | if (scope != PR_SCOPE_LU_SCOPE) { |
Andy Grover | 6708bb2 | 2011-06-08 10:36:43 -0700 | [diff] [blame] | 2777 | pr_err("SPC-3 PR: Illegal SCOPE: 0x%02x\n", scope); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 2778 | core_scsi3_put_pr_reg(pr_reg_n); |
Christoph Hellwig | de103c9 | 2012-11-06 12:24:09 -0800 | [diff] [blame] | 2779 | return TCM_INVALID_PARAMETER_LIST; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 2780 | } |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 2781 | |
| 2782 | spin_lock(&dev->dev_reservation_lock); |
| 2783 | pr_res_holder = dev->dev_pr_res_holder; |
| 2784 | if (pr_res_holder && |
| 2785 | ((pr_res_holder->pr_res_type == PR_TYPE_WRITE_EXCLUSIVE_ALLREG) || |
| 2786 | (pr_res_holder->pr_res_type == PR_TYPE_EXCLUSIVE_ACCESS_ALLREG))) |
| 2787 | all_reg = 1; |
| 2788 | |
Andy Grover | 6708bb2 | 2011-06-08 10:36:43 -0700 | [diff] [blame] | 2789 | if (!all_reg && !sa_res_key) { |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 2790 | spin_unlock(&dev->dev_reservation_lock); |
| 2791 | core_scsi3_put_pr_reg(pr_reg_n); |
Christoph Hellwig | de103c9 | 2012-11-06 12:24:09 -0800 | [diff] [blame] | 2792 | return TCM_INVALID_PARAMETER_LIST; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 2793 | } |
| 2794 | /* |
| 2795 | * From spc4r17, section 5.7.11.4.4 Removing Registrations: |
| 2796 | * |
| 2797 | * If the SERVICE ACTION RESERVATION KEY field does not identify a |
| 2798 | * persistent reservation holder or there is no persistent reservation |
| 2799 | * holder (i.e., there is no persistent reservation), then the device |
| 2800 | * server shall perform a preempt by doing the following in an |
| 2801 | * uninterrupted series of actions. (See below..) |
| 2802 | */ |
Andy Grover | 6708bb2 | 2011-06-08 10:36:43 -0700 | [diff] [blame] | 2803 | if (!pr_res_holder || (pr_res_holder->pr_res_key != sa_res_key)) { |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 2804 | /* |
| 2805 | * No existing or SA Reservation Key matching reservations.. |
| 2806 | * |
| 2807 | * PROUT SA PREEMPT with All Registrant type reservations are |
| 2808 | * allowed to be processed without a matching SA Reservation Key |
| 2809 | */ |
| 2810 | spin_lock(&pr_tmpl->registration_lock); |
| 2811 | list_for_each_entry_safe(pr_reg, pr_reg_tmp, |
| 2812 | &pr_tmpl->registration_list, pr_reg_list) { |
| 2813 | /* |
| 2814 | * Removing of registrations in non all registrants |
| 2815 | * type reservations without a matching SA reservation |
| 2816 | * key. |
| 2817 | * |
| 2818 | * a) Remove the registrations for all I_T nexuses |
| 2819 | * specified by the SERVICE ACTION RESERVATION KEY |
| 2820 | * field; |
| 2821 | * b) Ignore the contents of the SCOPE and TYPE fields; |
| 2822 | * c) Process tasks as defined in 5.7.1; and |
| 2823 | * d) Establish a unit attention condition for the |
| 2824 | * initiator port associated with every I_T nexus |
| 2825 | * that lost its registration other than the I_T |
| 2826 | * nexus on which the PERSISTENT RESERVE OUT command |
| 2827 | * was received, with the additional sense code set |
| 2828 | * to REGISTRATIONS PREEMPTED. |
| 2829 | */ |
Andy Grover | 6708bb2 | 2011-06-08 10:36:43 -0700 | [diff] [blame] | 2830 | if (!all_reg) { |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 2831 | if (pr_reg->pr_res_key != sa_res_key) |
| 2832 | continue; |
| 2833 | |
| 2834 | calling_it_nexus = (pr_reg_n == pr_reg) ? 1 : 0; |
| 2835 | pr_reg_nacl = pr_reg->pr_reg_nacl; |
| 2836 | pr_res_mapped_lun = pr_reg->pr_res_mapped_lun; |
| 2837 | __core_scsi3_free_registration(dev, pr_reg, |
Andy Grover | 33ce6a8 | 2013-05-16 10:40:54 -0700 | [diff] [blame] | 2838 | (preempt_type == PREEMPT_AND_ABORT) ? &preempt_and_abort_list : |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 2839 | NULL, calling_it_nexus); |
| 2840 | released_regs++; |
| 2841 | } else { |
| 2842 | /* |
| 2843 | * Case for any existing all registrants type |
| 2844 | * reservation, follow logic in spc4r17 section |
| 2845 | * 5.7.11.4 Preempting, Table 52 and Figure 7. |
| 2846 | * |
| 2847 | * For a ZERO SA Reservation key, release |
| 2848 | * all other registrations and do an implict |
| 2849 | * release of active persistent reservation. |
| 2850 | * |
| 2851 | * For a non-ZERO SA Reservation key, only |
| 2852 | * release the matching reservation key from |
| 2853 | * registrations. |
| 2854 | */ |
| 2855 | if ((sa_res_key) && |
| 2856 | (pr_reg->pr_res_key != sa_res_key)) |
| 2857 | continue; |
| 2858 | |
| 2859 | calling_it_nexus = (pr_reg_n == pr_reg) ? 1 : 0; |
| 2860 | if (calling_it_nexus) |
| 2861 | continue; |
| 2862 | |
| 2863 | pr_reg_nacl = pr_reg->pr_reg_nacl; |
| 2864 | pr_res_mapped_lun = pr_reg->pr_res_mapped_lun; |
| 2865 | __core_scsi3_free_registration(dev, pr_reg, |
Andy Grover | 33ce6a8 | 2013-05-16 10:40:54 -0700 | [diff] [blame] | 2866 | (preempt_type == PREEMPT_AND_ABORT) ? &preempt_and_abort_list : |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 2867 | NULL, 0); |
| 2868 | released_regs++; |
| 2869 | } |
Andy Grover | 6708bb2 | 2011-06-08 10:36:43 -0700 | [diff] [blame] | 2870 | if (!calling_it_nexus) |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 2871 | core_scsi3_ua_allocate(pr_reg_nacl, |
| 2872 | pr_res_mapped_lun, 0x2A, |
Marco Sanvido | 9e08e34 | 2012-01-03 17:12:57 -0800 | [diff] [blame] | 2873 | ASCQ_2AH_REGISTRATIONS_PREEMPTED); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 2874 | } |
| 2875 | spin_unlock(&pr_tmpl->registration_lock); |
| 2876 | /* |
| 2877 | * If a PERSISTENT RESERVE OUT with a PREEMPT service action or |
| 2878 | * a PREEMPT AND ABORT service action sets the SERVICE ACTION |
| 2879 | * RESERVATION KEY field to a value that does not match any |
| 2880 | * registered reservation key, then the device server shall |
| 2881 | * complete the command with RESERVATION CONFLICT status. |
| 2882 | */ |
Andy Grover | 6708bb2 | 2011-06-08 10:36:43 -0700 | [diff] [blame] | 2883 | if (!released_regs) { |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 2884 | spin_unlock(&dev->dev_reservation_lock); |
| 2885 | core_scsi3_put_pr_reg(pr_reg_n); |
Christoph Hellwig | de103c9 | 2012-11-06 12:24:09 -0800 | [diff] [blame] | 2886 | return TCM_RESERVATION_CONFLICT; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 2887 | } |
| 2888 | /* |
| 2889 | * For an existing all registrants type reservation |
| 2890 | * with a zero SA rservation key, preempt the existing |
| 2891 | * reservation with the new PR type and scope. |
| 2892 | */ |
| 2893 | if (pr_res_holder && all_reg && !(sa_res_key)) { |
| 2894 | __core_scsi3_complete_pro_preempt(dev, pr_reg_n, |
Andy Grover | 33ce6a8 | 2013-05-16 10:40:54 -0700 | [diff] [blame] | 2895 | (preempt_type == PREEMPT_AND_ABORT) ? &preempt_and_abort_list : NULL, |
| 2896 | type, scope, preempt_type); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 2897 | |
Andy Grover | 33ce6a8 | 2013-05-16 10:40:54 -0700 | [diff] [blame] | 2898 | if (preempt_type == PREEMPT_AND_ABORT) |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 2899 | core_scsi3_release_preempt_and_abort( |
| 2900 | &preempt_and_abort_list, pr_reg_n); |
| 2901 | } |
| 2902 | spin_unlock(&dev->dev_reservation_lock); |
| 2903 | |
Andy Grover | 459f213 | 2013-05-16 10:41:02 -0700 | [diff] [blame] | 2904 | if (pr_tmpl->pr_aptpl_active) |
| 2905 | core_scsi3_update_and_write_aptpl(cmd->se_dev, true); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 2906 | |
| 2907 | core_scsi3_put_pr_reg(pr_reg_n); |
Andy Grover | 5951146d | 2011-07-19 10:26:37 +0000 | [diff] [blame] | 2908 | core_scsi3_pr_generation(cmd->se_dev); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 2909 | return 0; |
| 2910 | } |
| 2911 | /* |
| 2912 | * The PREEMPTing SA reservation key matches that of the |
| 2913 | * existing persistent reservation, first, we check if |
| 2914 | * we are preempting our own reservation. |
| 2915 | * From spc4r17, section 5.7.11.4.3 Preempting |
| 2916 | * persistent reservations and registration handling |
| 2917 | * |
| 2918 | * If an all registrants persistent reservation is not |
| 2919 | * present, it is not an error for the persistent |
| 2920 | * reservation holder to preempt itself (i.e., a |
| 2921 | * PERSISTENT RESERVE OUT with a PREEMPT service action |
| 2922 | * or a PREEMPT AND ABORT service action with the |
| 2923 | * SERVICE ACTION RESERVATION KEY value equal to the |
| 2924 | * persistent reservation holder's reservation key that |
| 2925 | * is received from the persistent reservation holder). |
| 2926 | * In that case, the device server shall establish the |
| 2927 | * new persistent reservation and maintain the |
| 2928 | * registration. |
| 2929 | */ |
| 2930 | prh_type = pr_res_holder->pr_res_type; |
| 2931 | prh_scope = pr_res_holder->pr_res_scope; |
| 2932 | /* |
| 2933 | * If the SERVICE ACTION RESERVATION KEY field identifies a |
| 2934 | * persistent reservation holder (see 5.7.10), the device |
| 2935 | * server shall perform a preempt by doing the following as |
| 2936 | * an uninterrupted series of actions: |
| 2937 | * |
| 2938 | * a) Release the persistent reservation for the holder |
| 2939 | * identified by the SERVICE ACTION RESERVATION KEY field; |
| 2940 | */ |
| 2941 | if (pr_reg_n != pr_res_holder) |
| 2942 | __core_scsi3_complete_pro_release(dev, |
| 2943 | pr_res_holder->pr_reg_nacl, |
| 2944 | dev->dev_pr_res_holder, 0); |
| 2945 | /* |
| 2946 | * b) Remove the registrations for all I_T nexuses identified |
| 2947 | * by the SERVICE ACTION RESERVATION KEY field, except the |
| 2948 | * I_T nexus that is being used for the PERSISTENT RESERVE |
| 2949 | * OUT command. If an all registrants persistent reservation |
| 2950 | * is present and the SERVICE ACTION RESERVATION KEY field |
| 2951 | * is set to zero, then all registrations shall be removed |
| 2952 | * except for that of the I_T nexus that is being used for |
| 2953 | * the PERSISTENT RESERVE OUT command; |
| 2954 | */ |
| 2955 | spin_lock(&pr_tmpl->registration_lock); |
| 2956 | list_for_each_entry_safe(pr_reg, pr_reg_tmp, |
| 2957 | &pr_tmpl->registration_list, pr_reg_list) { |
| 2958 | |
| 2959 | calling_it_nexus = (pr_reg_n == pr_reg) ? 1 : 0; |
| 2960 | if (calling_it_nexus) |
| 2961 | continue; |
| 2962 | |
| 2963 | if (pr_reg->pr_res_key != sa_res_key) |
| 2964 | continue; |
| 2965 | |
| 2966 | pr_reg_nacl = pr_reg->pr_reg_nacl; |
| 2967 | pr_res_mapped_lun = pr_reg->pr_res_mapped_lun; |
| 2968 | __core_scsi3_free_registration(dev, pr_reg, |
Andy Grover | 33ce6a8 | 2013-05-16 10:40:54 -0700 | [diff] [blame] | 2969 | (preempt_type == PREEMPT_AND_ABORT) ? &preempt_and_abort_list : NULL, |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 2970 | calling_it_nexus); |
| 2971 | /* |
| 2972 | * e) Establish a unit attention condition for the initiator |
| 2973 | * port associated with every I_T nexus that lost its |
| 2974 | * persistent reservation and/or registration, with the |
| 2975 | * additional sense code set to REGISTRATIONS PREEMPTED; |
| 2976 | */ |
| 2977 | core_scsi3_ua_allocate(pr_reg_nacl, pr_res_mapped_lun, 0x2A, |
Marco Sanvido | 9e08e34 | 2012-01-03 17:12:57 -0800 | [diff] [blame] | 2978 | ASCQ_2AH_REGISTRATIONS_PREEMPTED); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 2979 | } |
| 2980 | spin_unlock(&pr_tmpl->registration_lock); |
| 2981 | /* |
| 2982 | * c) Establish a persistent reservation for the preempting |
| 2983 | * I_T nexus using the contents of the SCOPE and TYPE fields; |
| 2984 | */ |
| 2985 | __core_scsi3_complete_pro_preempt(dev, pr_reg_n, |
Andy Grover | 33ce6a8 | 2013-05-16 10:40:54 -0700 | [diff] [blame] | 2986 | (preempt_type == PREEMPT_AND_ABORT) ? &preempt_and_abort_list : NULL, |
| 2987 | type, scope, preempt_type); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 2988 | /* |
| 2989 | * d) Process tasks as defined in 5.7.1; |
| 2990 | * e) See above.. |
| 2991 | * f) If the type or scope has changed, then for every I_T nexus |
| 2992 | * whose reservation key was not removed, except for the I_T |
| 2993 | * nexus on which the PERSISTENT RESERVE OUT command was |
| 2994 | * received, the device server shall establish a unit |
| 2995 | * attention condition for the initiator port associated with |
| 2996 | * that I_T nexus, with the additional sense code set to |
| 2997 | * RESERVATIONS RELEASED. If the type or scope have not |
| 2998 | * changed, then no unit attention condition(s) shall be |
| 2999 | * established for this reason. |
| 3000 | */ |
| 3001 | if ((prh_type != type) || (prh_scope != scope)) { |
| 3002 | spin_lock(&pr_tmpl->registration_lock); |
| 3003 | list_for_each_entry_safe(pr_reg, pr_reg_tmp, |
| 3004 | &pr_tmpl->registration_list, pr_reg_list) { |
| 3005 | |
| 3006 | calling_it_nexus = (pr_reg_n == pr_reg) ? 1 : 0; |
| 3007 | if (calling_it_nexus) |
| 3008 | continue; |
| 3009 | |
| 3010 | core_scsi3_ua_allocate(pr_reg->pr_reg_nacl, |
| 3011 | pr_reg->pr_res_mapped_lun, 0x2A, |
| 3012 | ASCQ_2AH_RESERVATIONS_RELEASED); |
| 3013 | } |
| 3014 | spin_unlock(&pr_tmpl->registration_lock); |
| 3015 | } |
| 3016 | spin_unlock(&dev->dev_reservation_lock); |
| 3017 | /* |
| 3018 | * Call LUN_RESET logic upon list of struct t10_pr_registration, |
| 3019 | * All received CDBs for the matching existing reservation and |
| 3020 | * registrations undergo ABORT_TASK logic. |
| 3021 | * |
| 3022 | * From there, core_scsi3_release_preempt_and_abort() will |
| 3023 | * release every registration in the list (which have already |
| 3024 | * been removed from the primary pr_reg list), except the |
| 3025 | * new persistent reservation holder, the calling Initiator Port. |
| 3026 | */ |
Andy Grover | 33ce6a8 | 2013-05-16 10:40:54 -0700 | [diff] [blame] | 3027 | if (preempt_type == PREEMPT_AND_ABORT) { |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 3028 | core_tmr_lun_reset(dev, NULL, &preempt_and_abort_list, cmd); |
| 3029 | core_scsi3_release_preempt_and_abort(&preempt_and_abort_list, |
| 3030 | pr_reg_n); |
| 3031 | } |
| 3032 | |
Andy Grover | 459f213 | 2013-05-16 10:41:02 -0700 | [diff] [blame] | 3033 | if (pr_tmpl->pr_aptpl_active) |
| 3034 | core_scsi3_update_and_write_aptpl(cmd->se_dev, true); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 3035 | |
| 3036 | core_scsi3_put_pr_reg(pr_reg_n); |
Andy Grover | 5951146d | 2011-07-19 10:26:37 +0000 | [diff] [blame] | 3037 | core_scsi3_pr_generation(cmd->se_dev); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 3038 | return 0; |
| 3039 | } |
| 3040 | |
Christoph Hellwig | de103c9 | 2012-11-06 12:24:09 -0800 | [diff] [blame] | 3041 | static sense_reason_t |
| 3042 | core_scsi3_emulate_pro_preempt(struct se_cmd *cmd, int type, int scope, |
Andy Grover | 33ce6a8 | 2013-05-16 10:40:54 -0700 | [diff] [blame] | 3043 | u64 res_key, u64 sa_res_key, enum preempt_type preempt_type) |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 3044 | { |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 3045 | switch (type) { |
| 3046 | case PR_TYPE_WRITE_EXCLUSIVE: |
| 3047 | case PR_TYPE_EXCLUSIVE_ACCESS: |
| 3048 | case PR_TYPE_WRITE_EXCLUSIVE_REGONLY: |
| 3049 | case PR_TYPE_EXCLUSIVE_ACCESS_REGONLY: |
| 3050 | case PR_TYPE_WRITE_EXCLUSIVE_ALLREG: |
| 3051 | case PR_TYPE_EXCLUSIVE_ACCESS_ALLREG: |
Christoph Hellwig | de103c9 | 2012-11-06 12:24:09 -0800 | [diff] [blame] | 3052 | return core_scsi3_pro_preempt(cmd, type, scope, res_key, |
Andy Grover | 33ce6a8 | 2013-05-16 10:40:54 -0700 | [diff] [blame] | 3053 | sa_res_key, preempt_type); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 3054 | default: |
Andy Grover | 6708bb2 | 2011-06-08 10:36:43 -0700 | [diff] [blame] | 3055 | pr_err("SPC-3 PR: Unknown Service Action PREEMPT%s" |
Andy Grover | 33ce6a8 | 2013-05-16 10:40:54 -0700 | [diff] [blame] | 3056 | " Type: 0x%02x\n", (preempt_type == PREEMPT_AND_ABORT) ? "_AND_ABORT" : "", type); |
Christoph Hellwig | de103c9 | 2012-11-06 12:24:09 -0800 | [diff] [blame] | 3057 | return TCM_INVALID_CDB_FIELD; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 3058 | } |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 3059 | } |
| 3060 | |
| 3061 | |
Christoph Hellwig | de103c9 | 2012-11-06 12:24:09 -0800 | [diff] [blame] | 3062 | static sense_reason_t |
| 3063 | core_scsi3_emulate_pro_register_and_move(struct se_cmd *cmd, u64 res_key, |
| 3064 | u64 sa_res_key, int aptpl, int unreg) |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 3065 | { |
Andy Grover | e3d6f90 | 2011-07-19 08:55:10 +0000 | [diff] [blame] | 3066 | struct se_session *se_sess = cmd->se_sess; |
Andy Grover | 5951146d | 2011-07-19 10:26:37 +0000 | [diff] [blame] | 3067 | struct se_device *dev = cmd->se_dev; |
Jörn Engel | 2816890 | 2012-03-15 15:06:58 -0400 | [diff] [blame] | 3068 | struct se_dev_entry *dest_se_deve = NULL; |
Andy Grover | e3d6f90 | 2011-07-19 08:55:10 +0000 | [diff] [blame] | 3069 | struct se_lun *se_lun = cmd->se_lun; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 3070 | struct se_node_acl *pr_res_nacl, *pr_reg_nacl, *dest_node_acl = NULL; |
| 3071 | struct se_port *se_port; |
| 3072 | struct se_portal_group *se_tpg, *dest_se_tpg = NULL; |
| 3073 | struct target_core_fabric_ops *dest_tf_ops = NULL, *tf_ops; |
| 3074 | struct t10_pr_registration *pr_reg, *pr_res_holder, *dest_pr_reg; |
Christoph Hellwig | 0fd97cc | 2012-10-08 00:03:19 -0400 | [diff] [blame] | 3075 | struct t10_reservation *pr_tmpl = &dev->t10_pr; |
Andy Grover | 05d1c7c | 2011-07-20 19:13:28 +0000 | [diff] [blame] | 3076 | unsigned char *buf; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 3077 | unsigned char *initiator_str; |
| 3078 | char *iport_ptr = NULL, dest_iport[64], i_buf[PR_REG_ISID_ID_LEN]; |
| 3079 | u32 tid_len, tmp_tid_len; |
Andy Grover | d2843c1 | 2013-05-16 10:40:55 -0700 | [diff] [blame] | 3080 | int new_reg = 0, type, scope, matching_iname; |
Christoph Hellwig | de103c9 | 2012-11-06 12:24:09 -0800 | [diff] [blame] | 3081 | sense_reason_t ret; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 3082 | unsigned short rtpi; |
| 3083 | unsigned char proto_ident; |
| 3084 | |
Andy Grover | 6708bb2 | 2011-06-08 10:36:43 -0700 | [diff] [blame] | 3085 | if (!se_sess || !se_lun) { |
| 3086 | pr_err("SPC-3 PR: se_sess || struct se_lun is NULL!\n"); |
Christoph Hellwig | de103c9 | 2012-11-06 12:24:09 -0800 | [diff] [blame] | 3087 | return TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 3088 | } |
Christoph Hellwig | de103c9 | 2012-11-06 12:24:09 -0800 | [diff] [blame] | 3089 | |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 3090 | memset(dest_iport, 0, 64); |
| 3091 | memset(i_buf, 0, PR_REG_ISID_ID_LEN); |
| 3092 | se_tpg = se_sess->se_tpg; |
Andy Grover | e3d6f90 | 2011-07-19 08:55:10 +0000 | [diff] [blame] | 3093 | tf_ops = se_tpg->se_tpg_tfo; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 3094 | /* |
| 3095 | * Follow logic from spc4r17 Section 5.7.8, Table 50 -- |
| 3096 | * Register behaviors for a REGISTER AND MOVE service action |
| 3097 | * |
| 3098 | * Locate the existing *pr_reg via struct se_node_acl pointers |
| 3099 | */ |
Andy Grover | 5951146d | 2011-07-19 10:26:37 +0000 | [diff] [blame] | 3100 | pr_reg = core_scsi3_locate_pr_reg(cmd->se_dev, se_sess->se_node_acl, |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 3101 | se_sess); |
Andy Grover | 6708bb2 | 2011-06-08 10:36:43 -0700 | [diff] [blame] | 3102 | if (!pr_reg) { |
| 3103 | pr_err("SPC-3 PR: Unable to locate PR_REGISTERED" |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 3104 | " *pr_reg for REGISTER_AND_MOVE\n"); |
Christoph Hellwig | de103c9 | 2012-11-06 12:24:09 -0800 | [diff] [blame] | 3105 | return TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 3106 | } |
| 3107 | /* |
| 3108 | * The provided reservation key much match the existing reservation key |
| 3109 | * provided during this initiator's I_T nexus registration. |
| 3110 | */ |
| 3111 | if (res_key != pr_reg->pr_res_key) { |
Andy Grover | 6708bb2 | 2011-06-08 10:36:43 -0700 | [diff] [blame] | 3112 | pr_warn("SPC-3 PR REGISTER_AND_MOVE: Received" |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 3113 | " res_key: 0x%016Lx does not match existing SA REGISTER" |
| 3114 | " res_key: 0x%016Lx\n", res_key, pr_reg->pr_res_key); |
Christoph Hellwig | de103c9 | 2012-11-06 12:24:09 -0800 | [diff] [blame] | 3115 | ret = TCM_RESERVATION_CONFLICT; |
| 3116 | goto out_put_pr_reg; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 3117 | } |
| 3118 | /* |
| 3119 | * The service active reservation key needs to be non zero |
| 3120 | */ |
Andy Grover | 6708bb2 | 2011-06-08 10:36:43 -0700 | [diff] [blame] | 3121 | if (!sa_res_key) { |
| 3122 | pr_warn("SPC-3 PR REGISTER_AND_MOVE: Received zero" |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 3123 | " sa_res_key\n"); |
Christoph Hellwig | de103c9 | 2012-11-06 12:24:09 -0800 | [diff] [blame] | 3124 | ret = TCM_INVALID_PARAMETER_LIST; |
| 3125 | goto out_put_pr_reg; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 3126 | } |
Andy Grover | 05d1c7c | 2011-07-20 19:13:28 +0000 | [diff] [blame] | 3127 | |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 3128 | /* |
| 3129 | * Determine the Relative Target Port Identifier where the reservation |
| 3130 | * will be moved to for the TransportID containing SCSI initiator WWN |
| 3131 | * information. |
| 3132 | */ |
Andy Grover | 4949314 | 2012-01-16 16:57:08 -0800 | [diff] [blame] | 3133 | buf = transport_kmap_data_sg(cmd); |
Christoph Hellwig | de103c9 | 2012-11-06 12:24:09 -0800 | [diff] [blame] | 3134 | if (!buf) { |
| 3135 | ret = TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; |
| 3136 | goto out_put_pr_reg; |
| 3137 | } |
| 3138 | |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 3139 | rtpi = (buf[18] & 0xff) << 8; |
| 3140 | rtpi |= buf[19] & 0xff; |
| 3141 | tid_len = (buf[20] & 0xff) << 24; |
| 3142 | tid_len |= (buf[21] & 0xff) << 16; |
| 3143 | tid_len |= (buf[22] & 0xff) << 8; |
| 3144 | tid_len |= buf[23] & 0xff; |
Andy Grover | 4949314 | 2012-01-16 16:57:08 -0800 | [diff] [blame] | 3145 | transport_kunmap_data_sg(cmd); |
Andy Grover | 05d1c7c | 2011-07-20 19:13:28 +0000 | [diff] [blame] | 3146 | buf = NULL; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 3147 | |
| 3148 | if ((tid_len + 24) != cmd->data_length) { |
Andy Grover | 6708bb2 | 2011-06-08 10:36:43 -0700 | [diff] [blame] | 3149 | pr_err("SPC-3 PR: Illegal tid_len: %u + 24 byte header" |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 3150 | " does not equal CDB data_length: %u\n", tid_len, |
| 3151 | cmd->data_length); |
Christoph Hellwig | de103c9 | 2012-11-06 12:24:09 -0800 | [diff] [blame] | 3152 | ret = TCM_INVALID_PARAMETER_LIST; |
| 3153 | goto out_put_pr_reg; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 3154 | } |
| 3155 | |
| 3156 | spin_lock(&dev->se_port_lock); |
| 3157 | list_for_each_entry(se_port, &dev->dev_sep_list, sep_list) { |
| 3158 | if (se_port->sep_rtpi != rtpi) |
| 3159 | continue; |
| 3160 | dest_se_tpg = se_port->sep_tpg; |
Andy Grover | 6708bb2 | 2011-06-08 10:36:43 -0700 | [diff] [blame] | 3161 | if (!dest_se_tpg) |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 3162 | continue; |
Andy Grover | e3d6f90 | 2011-07-19 08:55:10 +0000 | [diff] [blame] | 3163 | dest_tf_ops = dest_se_tpg->se_tpg_tfo; |
Andy Grover | 6708bb2 | 2011-06-08 10:36:43 -0700 | [diff] [blame] | 3164 | if (!dest_tf_ops) |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 3165 | continue; |
| 3166 | |
| 3167 | atomic_inc(&dest_se_tpg->tpg_pr_ref_count); |
| 3168 | smp_mb__after_atomic_inc(); |
| 3169 | spin_unlock(&dev->se_port_lock); |
| 3170 | |
Christoph Hellwig | de103c9 | 2012-11-06 12:24:09 -0800 | [diff] [blame] | 3171 | if (core_scsi3_tpg_depend_item(dest_se_tpg)) { |
Andy Grover | 6708bb2 | 2011-06-08 10:36:43 -0700 | [diff] [blame] | 3172 | pr_err("core_scsi3_tpg_depend_item() failed" |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 3173 | " for dest_se_tpg\n"); |
| 3174 | atomic_dec(&dest_se_tpg->tpg_pr_ref_count); |
| 3175 | smp_mb__after_atomic_dec(); |
Christoph Hellwig | de103c9 | 2012-11-06 12:24:09 -0800 | [diff] [blame] | 3176 | ret = TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; |
| 3177 | goto out_put_pr_reg; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 3178 | } |
| 3179 | |
| 3180 | spin_lock(&dev->se_port_lock); |
| 3181 | break; |
| 3182 | } |
| 3183 | spin_unlock(&dev->se_port_lock); |
| 3184 | |
Andy Grover | 6708bb2 | 2011-06-08 10:36:43 -0700 | [diff] [blame] | 3185 | if (!dest_se_tpg || !dest_tf_ops) { |
| 3186 | pr_err("SPC-3 PR REGISTER_AND_MOVE: Unable to locate" |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 3187 | " fabric ops from Relative Target Port Identifier:" |
| 3188 | " %hu\n", rtpi); |
Christoph Hellwig | de103c9 | 2012-11-06 12:24:09 -0800 | [diff] [blame] | 3189 | ret = TCM_INVALID_PARAMETER_LIST; |
| 3190 | goto out_put_pr_reg; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 3191 | } |
Andy Grover | 05d1c7c | 2011-07-20 19:13:28 +0000 | [diff] [blame] | 3192 | |
Andy Grover | 4949314 | 2012-01-16 16:57:08 -0800 | [diff] [blame] | 3193 | buf = transport_kmap_data_sg(cmd); |
Christoph Hellwig | de103c9 | 2012-11-06 12:24:09 -0800 | [diff] [blame] | 3194 | if (!buf) { |
| 3195 | ret = TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; |
| 3196 | goto out_put_pr_reg; |
| 3197 | } |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 3198 | proto_ident = (buf[24] & 0x0f); |
Andy Grover | 8b1e124 | 2012-04-03 15:51:12 -0700 | [diff] [blame] | 3199 | |
Andy Grover | 6708bb2 | 2011-06-08 10:36:43 -0700 | [diff] [blame] | 3200 | pr_debug("SPC-3 PR REGISTER_AND_MOVE: Extracted Protocol Identifier:" |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 3201 | " 0x%02x\n", proto_ident); |
Andy Grover | 8b1e124 | 2012-04-03 15:51:12 -0700 | [diff] [blame] | 3202 | |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 3203 | if (proto_ident != dest_tf_ops->get_fabric_proto_ident(dest_se_tpg)) { |
Andy Grover | 6708bb2 | 2011-06-08 10:36:43 -0700 | [diff] [blame] | 3204 | pr_err("SPC-3 PR REGISTER_AND_MOVE: Received" |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 3205 | " proto_ident: 0x%02x does not match ident: 0x%02x" |
| 3206 | " from fabric: %s\n", proto_ident, |
| 3207 | dest_tf_ops->get_fabric_proto_ident(dest_se_tpg), |
| 3208 | dest_tf_ops->get_fabric_name()); |
Christoph Hellwig | de103c9 | 2012-11-06 12:24:09 -0800 | [diff] [blame] | 3209 | ret = TCM_INVALID_PARAMETER_LIST; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 3210 | goto out; |
| 3211 | } |
| 3212 | if (dest_tf_ops->tpg_parse_pr_out_transport_id == NULL) { |
Andy Grover | 6708bb2 | 2011-06-08 10:36:43 -0700 | [diff] [blame] | 3213 | pr_err("SPC-3 PR REGISTER_AND_MOVE: Fabric does not" |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 3214 | " containg a valid tpg_parse_pr_out_transport_id" |
| 3215 | " function pointer\n"); |
Christoph Hellwig | de103c9 | 2012-11-06 12:24:09 -0800 | [diff] [blame] | 3216 | ret = TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 3217 | goto out; |
| 3218 | } |
| 3219 | initiator_str = dest_tf_ops->tpg_parse_pr_out_transport_id(dest_se_tpg, |
| 3220 | (const char *)&buf[24], &tmp_tid_len, &iport_ptr); |
Andy Grover | 6708bb2 | 2011-06-08 10:36:43 -0700 | [diff] [blame] | 3221 | if (!initiator_str) { |
| 3222 | pr_err("SPC-3 PR REGISTER_AND_MOVE: Unable to locate" |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 3223 | " initiator_str from Transport ID\n"); |
Christoph Hellwig | de103c9 | 2012-11-06 12:24:09 -0800 | [diff] [blame] | 3224 | ret = TCM_INVALID_PARAMETER_LIST; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 3225 | goto out; |
| 3226 | } |
| 3227 | |
Andy Grover | 4949314 | 2012-01-16 16:57:08 -0800 | [diff] [blame] | 3228 | transport_kunmap_data_sg(cmd); |
Andy Grover | 05d1c7c | 2011-07-20 19:13:28 +0000 | [diff] [blame] | 3229 | buf = NULL; |
| 3230 | |
Andy Grover | 6708bb2 | 2011-06-08 10:36:43 -0700 | [diff] [blame] | 3231 | pr_debug("SPC-3 PR [%s] Extracted initiator %s identifier: %s" |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 3232 | " %s\n", dest_tf_ops->get_fabric_name(), (iport_ptr != NULL) ? |
| 3233 | "port" : "device", initiator_str, (iport_ptr != NULL) ? |
| 3234 | iport_ptr : ""); |
| 3235 | /* |
| 3236 | * If a PERSISTENT RESERVE OUT command with a REGISTER AND MOVE service |
| 3237 | * action specifies a TransportID that is the same as the initiator port |
| 3238 | * of the I_T nexus for the command received, then the command shall |
| 3239 | * be terminated with CHECK CONDITION status, with the sense key set to |
| 3240 | * ILLEGAL REQUEST, and the additional sense code set to INVALID FIELD |
| 3241 | * IN PARAMETER LIST. |
| 3242 | */ |
| 3243 | pr_reg_nacl = pr_reg->pr_reg_nacl; |
| 3244 | matching_iname = (!strcmp(initiator_str, |
| 3245 | pr_reg_nacl->initiatorname)) ? 1 : 0; |
Andy Grover | 6708bb2 | 2011-06-08 10:36:43 -0700 | [diff] [blame] | 3246 | if (!matching_iname) |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 3247 | goto after_iport_check; |
| 3248 | |
Andy Grover | 6708bb2 | 2011-06-08 10:36:43 -0700 | [diff] [blame] | 3249 | if (!iport_ptr || !pr_reg->isid_present_at_reg) { |
| 3250 | pr_err("SPC-3 PR REGISTER_AND_MOVE: TransportID: %s" |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 3251 | " matches: %s on received I_T Nexus\n", initiator_str, |
| 3252 | pr_reg_nacl->initiatorname); |
Christoph Hellwig | de103c9 | 2012-11-06 12:24:09 -0800 | [diff] [blame] | 3253 | ret = TCM_INVALID_PARAMETER_LIST; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 3254 | goto out; |
| 3255 | } |
Andy Grover | 6708bb2 | 2011-06-08 10:36:43 -0700 | [diff] [blame] | 3256 | if (!strcmp(iport_ptr, pr_reg->pr_reg_isid)) { |
| 3257 | pr_err("SPC-3 PR REGISTER_AND_MOVE: TransportID: %s %s" |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 3258 | " matches: %s %s on received I_T Nexus\n", |
| 3259 | initiator_str, iport_ptr, pr_reg_nacl->initiatorname, |
| 3260 | pr_reg->pr_reg_isid); |
Christoph Hellwig | de103c9 | 2012-11-06 12:24:09 -0800 | [diff] [blame] | 3261 | ret = TCM_INVALID_PARAMETER_LIST; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 3262 | goto out; |
| 3263 | } |
| 3264 | after_iport_check: |
| 3265 | /* |
| 3266 | * Locate the destination struct se_node_acl from the received Transport ID |
| 3267 | */ |
Roland Dreier | 2863888 | 2011-08-16 09:40:01 -0700 | [diff] [blame] | 3268 | spin_lock_irq(&dest_se_tpg->acl_node_lock); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 3269 | dest_node_acl = __core_tpg_get_initiator_node_acl(dest_se_tpg, |
| 3270 | initiator_str); |
| 3271 | if (dest_node_acl) { |
| 3272 | atomic_inc(&dest_node_acl->acl_pr_ref_count); |
| 3273 | smp_mb__after_atomic_inc(); |
| 3274 | } |
Roland Dreier | 2863888 | 2011-08-16 09:40:01 -0700 | [diff] [blame] | 3275 | spin_unlock_irq(&dest_se_tpg->acl_node_lock); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 3276 | |
Andy Grover | 6708bb2 | 2011-06-08 10:36:43 -0700 | [diff] [blame] | 3277 | if (!dest_node_acl) { |
| 3278 | pr_err("Unable to locate %s dest_node_acl for" |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 3279 | " TransportID%s\n", dest_tf_ops->get_fabric_name(), |
| 3280 | initiator_str); |
Christoph Hellwig | de103c9 | 2012-11-06 12:24:09 -0800 | [diff] [blame] | 3281 | ret = TCM_INVALID_PARAMETER_LIST; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 3282 | goto out; |
| 3283 | } |
Christoph Hellwig | de103c9 | 2012-11-06 12:24:09 -0800 | [diff] [blame] | 3284 | |
| 3285 | if (core_scsi3_nodeacl_depend_item(dest_node_acl)) { |
Andy Grover | 6708bb2 | 2011-06-08 10:36:43 -0700 | [diff] [blame] | 3286 | pr_err("core_scsi3_nodeacl_depend_item() for" |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 3287 | " dest_node_acl\n"); |
| 3288 | atomic_dec(&dest_node_acl->acl_pr_ref_count); |
| 3289 | smp_mb__after_atomic_dec(); |
| 3290 | dest_node_acl = NULL; |
Christoph Hellwig | de103c9 | 2012-11-06 12:24:09 -0800 | [diff] [blame] | 3291 | ret = TCM_INVALID_PARAMETER_LIST; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 3292 | goto out; |
| 3293 | } |
Andy Grover | 8b1e124 | 2012-04-03 15:51:12 -0700 | [diff] [blame] | 3294 | |
Andy Grover | 6708bb2 | 2011-06-08 10:36:43 -0700 | [diff] [blame] | 3295 | pr_debug("SPC-3 PR REGISTER_AND_MOVE: Found %s dest_node_acl:" |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 3296 | " %s from TransportID\n", dest_tf_ops->get_fabric_name(), |
| 3297 | dest_node_acl->initiatorname); |
Andy Grover | 8b1e124 | 2012-04-03 15:51:12 -0700 | [diff] [blame] | 3298 | |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 3299 | /* |
| 3300 | * Locate the struct se_dev_entry pointer for the matching RELATIVE TARGET |
| 3301 | * PORT IDENTIFIER. |
| 3302 | */ |
| 3303 | dest_se_deve = core_get_se_deve_from_rtpi(dest_node_acl, rtpi); |
Andy Grover | 6708bb2 | 2011-06-08 10:36:43 -0700 | [diff] [blame] | 3304 | if (!dest_se_deve) { |
| 3305 | pr_err("Unable to locate %s dest_se_deve from RTPI:" |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 3306 | " %hu\n", dest_tf_ops->get_fabric_name(), rtpi); |
Christoph Hellwig | de103c9 | 2012-11-06 12:24:09 -0800 | [diff] [blame] | 3307 | ret = TCM_INVALID_PARAMETER_LIST; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 3308 | goto out; |
| 3309 | } |
| 3310 | |
Christoph Hellwig | de103c9 | 2012-11-06 12:24:09 -0800 | [diff] [blame] | 3311 | if (core_scsi3_lunacl_depend_item(dest_se_deve)) { |
Andy Grover | 6708bb2 | 2011-06-08 10:36:43 -0700 | [diff] [blame] | 3312 | pr_err("core_scsi3_lunacl_depend_item() failed\n"); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 3313 | atomic_dec(&dest_se_deve->pr_ref_count); |
| 3314 | smp_mb__after_atomic_dec(); |
| 3315 | dest_se_deve = NULL; |
Christoph Hellwig | de103c9 | 2012-11-06 12:24:09 -0800 | [diff] [blame] | 3316 | ret = TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 3317 | goto out; |
| 3318 | } |
Andy Grover | 8b1e124 | 2012-04-03 15:51:12 -0700 | [diff] [blame] | 3319 | |
Andy Grover | 6708bb2 | 2011-06-08 10:36:43 -0700 | [diff] [blame] | 3320 | pr_debug("SPC-3 PR REGISTER_AND_MOVE: Located %s node %s LUN" |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 3321 | " ACL for dest_se_deve->mapped_lun: %u\n", |
| 3322 | dest_tf_ops->get_fabric_name(), dest_node_acl->initiatorname, |
| 3323 | dest_se_deve->mapped_lun); |
Andy Grover | 8b1e124 | 2012-04-03 15:51:12 -0700 | [diff] [blame] | 3324 | |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 3325 | /* |
| 3326 | * A persistent reservation needs to already existing in order to |
| 3327 | * successfully complete the REGISTER_AND_MOVE service action.. |
| 3328 | */ |
| 3329 | spin_lock(&dev->dev_reservation_lock); |
| 3330 | pr_res_holder = dev->dev_pr_res_holder; |
Andy Grover | 6708bb2 | 2011-06-08 10:36:43 -0700 | [diff] [blame] | 3331 | if (!pr_res_holder) { |
| 3332 | pr_warn("SPC-3 PR REGISTER_AND_MOVE: No reservation" |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 3333 | " currently held\n"); |
| 3334 | spin_unlock(&dev->dev_reservation_lock); |
Christoph Hellwig | de103c9 | 2012-11-06 12:24:09 -0800 | [diff] [blame] | 3335 | ret = TCM_INVALID_CDB_FIELD; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 3336 | goto out; |
| 3337 | } |
| 3338 | /* |
| 3339 | * The received on I_T Nexus must be the reservation holder. |
| 3340 | * |
| 3341 | * From spc4r17 section 5.7.8 Table 50 -- |
| 3342 | * Register behaviors for a REGISTER AND MOVE service action |
| 3343 | */ |
| 3344 | if (pr_res_holder != pr_reg) { |
Andy Grover | 6708bb2 | 2011-06-08 10:36:43 -0700 | [diff] [blame] | 3345 | pr_warn("SPC-3 PR REGISTER_AND_MOVE: Calling I_T" |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 3346 | " Nexus is not reservation holder\n"); |
| 3347 | spin_unlock(&dev->dev_reservation_lock); |
Christoph Hellwig | de103c9 | 2012-11-06 12:24:09 -0800 | [diff] [blame] | 3348 | ret = TCM_RESERVATION_CONFLICT; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 3349 | goto out; |
| 3350 | } |
| 3351 | /* |
| 3352 | * From spc4r17 section 5.7.8: registering and moving reservation |
| 3353 | * |
| 3354 | * If a PERSISTENT RESERVE OUT command with a REGISTER AND MOVE service |
| 3355 | * action is received and the established persistent reservation is a |
| 3356 | * Write Exclusive - All Registrants type or Exclusive Access - |
| 3357 | * All Registrants type reservation, then the command shall be completed |
| 3358 | * with RESERVATION CONFLICT status. |
| 3359 | */ |
| 3360 | if ((pr_res_holder->pr_res_type == PR_TYPE_WRITE_EXCLUSIVE_ALLREG) || |
| 3361 | (pr_res_holder->pr_res_type == PR_TYPE_EXCLUSIVE_ACCESS_ALLREG)) { |
Andy Grover | 6708bb2 | 2011-06-08 10:36:43 -0700 | [diff] [blame] | 3362 | pr_warn("SPC-3 PR REGISTER_AND_MOVE: Unable to move" |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 3363 | " reservation for type: %s\n", |
| 3364 | core_scsi3_pr_dump_type(pr_res_holder->pr_res_type)); |
| 3365 | spin_unlock(&dev->dev_reservation_lock); |
Christoph Hellwig | de103c9 | 2012-11-06 12:24:09 -0800 | [diff] [blame] | 3366 | ret = TCM_RESERVATION_CONFLICT; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 3367 | goto out; |
| 3368 | } |
| 3369 | pr_res_nacl = pr_res_holder->pr_reg_nacl; |
| 3370 | /* |
| 3371 | * b) Ignore the contents of the (received) SCOPE and TYPE fields; |
| 3372 | */ |
| 3373 | type = pr_res_holder->pr_res_type; |
| 3374 | scope = pr_res_holder->pr_res_type; |
| 3375 | /* |
| 3376 | * c) Associate the reservation key specified in the SERVICE ACTION |
| 3377 | * RESERVATION KEY field with the I_T nexus specified as the |
| 3378 | * destination of the register and move, where: |
| 3379 | * A) The I_T nexus is specified by the TransportID and the |
| 3380 | * RELATIVE TARGET PORT IDENTIFIER field (see 6.14.4); and |
| 3381 | * B) Regardless of the TransportID format used, the association for |
| 3382 | * the initiator port is based on either the initiator port name |
| 3383 | * (see 3.1.71) on SCSI transport protocols where port names are |
| 3384 | * required or the initiator port identifier (see 3.1.70) on SCSI |
| 3385 | * transport protocols where port names are not required; |
| 3386 | * d) Register the reservation key specified in the SERVICE ACTION |
| 3387 | * RESERVATION KEY field; |
| 3388 | * e) Retain the reservation key specified in the SERVICE ACTION |
| 3389 | * RESERVATION KEY field and associated information; |
| 3390 | * |
| 3391 | * Also, It is not an error for a REGISTER AND MOVE service action to |
| 3392 | * register an I_T nexus that is already registered with the same |
| 3393 | * reservation key or a different reservation key. |
| 3394 | */ |
| 3395 | dest_pr_reg = __core_scsi3_locate_pr_reg(dev, dest_node_acl, |
| 3396 | iport_ptr); |
Andy Grover | 6708bb2 | 2011-06-08 10:36:43 -0700 | [diff] [blame] | 3397 | if (!dest_pr_reg) { |
Christoph Hellwig | de103c9 | 2012-11-06 12:24:09 -0800 | [diff] [blame] | 3398 | if (core_scsi3_alloc_registration(cmd->se_dev, |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 3399 | dest_node_acl, dest_se_deve, iport_ptr, |
Christoph Hellwig | de103c9 | 2012-11-06 12:24:09 -0800 | [diff] [blame] | 3400 | sa_res_key, 0, aptpl, 2, 1)) { |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 3401 | spin_unlock(&dev->dev_reservation_lock); |
Christoph Hellwig | de103c9 | 2012-11-06 12:24:09 -0800 | [diff] [blame] | 3402 | ret = TCM_INVALID_PARAMETER_LIST; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 3403 | goto out; |
| 3404 | } |
| 3405 | dest_pr_reg = __core_scsi3_locate_pr_reg(dev, dest_node_acl, |
| 3406 | iport_ptr); |
| 3407 | new_reg = 1; |
| 3408 | } |
| 3409 | /* |
| 3410 | * f) Release the persistent reservation for the persistent reservation |
| 3411 | * holder (i.e., the I_T nexus on which the |
| 3412 | */ |
| 3413 | __core_scsi3_complete_pro_release(dev, pr_res_nacl, |
| 3414 | dev->dev_pr_res_holder, 0); |
| 3415 | /* |
| 3416 | * g) Move the persistent reservation to the specified I_T nexus using |
| 3417 | * the same scope and type as the persistent reservation released in |
| 3418 | * item f); and |
| 3419 | */ |
| 3420 | dev->dev_pr_res_holder = dest_pr_reg; |
| 3421 | dest_pr_reg->pr_res_holder = 1; |
| 3422 | dest_pr_reg->pr_res_type = type; |
| 3423 | pr_reg->pr_res_scope = scope; |
Andy Grover | d2843c1 | 2013-05-16 10:40:55 -0700 | [diff] [blame] | 3424 | core_pr_dump_initiator_port(pr_reg, i_buf, PR_REG_ISID_ID_LEN); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 3425 | /* |
| 3426 | * Increment PRGeneration for existing registrations.. |
| 3427 | */ |
Andy Grover | 6708bb2 | 2011-06-08 10:36:43 -0700 | [diff] [blame] | 3428 | if (!new_reg) |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 3429 | dest_pr_reg->pr_res_generation = pr_tmpl->pr_generation++; |
| 3430 | spin_unlock(&dev->dev_reservation_lock); |
| 3431 | |
Andy Grover | 6708bb2 | 2011-06-08 10:36:43 -0700 | [diff] [blame] | 3432 | pr_debug("SPC-3 PR [%s] Service Action: REGISTER_AND_MOVE" |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 3433 | " created new reservation holder TYPE: %s on object RTPI:" |
| 3434 | " %hu PRGeneration: 0x%08x\n", dest_tf_ops->get_fabric_name(), |
| 3435 | core_scsi3_pr_dump_type(type), rtpi, |
| 3436 | dest_pr_reg->pr_res_generation); |
Andy Grover | 6708bb2 | 2011-06-08 10:36:43 -0700 | [diff] [blame] | 3437 | pr_debug("SPC-3 PR Successfully moved reservation from" |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 3438 | " %s Fabric Node: %s%s -> %s Fabric Node: %s %s\n", |
| 3439 | tf_ops->get_fabric_name(), pr_reg_nacl->initiatorname, |
Andy Grover | d2843c1 | 2013-05-16 10:40:55 -0700 | [diff] [blame] | 3440 | i_buf, dest_tf_ops->get_fabric_name(), |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 3441 | dest_node_acl->initiatorname, (iport_ptr != NULL) ? |
| 3442 | iport_ptr : ""); |
| 3443 | /* |
| 3444 | * It is now safe to release configfs group dependencies for destination |
| 3445 | * of Transport ID Initiator Device/Port Identifier |
| 3446 | */ |
| 3447 | core_scsi3_lunacl_undepend_item(dest_se_deve); |
| 3448 | core_scsi3_nodeacl_undepend_item(dest_node_acl); |
| 3449 | core_scsi3_tpg_undepend_item(dest_se_tpg); |
| 3450 | /* |
| 3451 | * h) If the UNREG bit is set to one, unregister (see 5.7.11.3) the I_T |
| 3452 | * nexus on which PERSISTENT RESERVE OUT command was received. |
| 3453 | */ |
| 3454 | if (unreg) { |
| 3455 | spin_lock(&pr_tmpl->registration_lock); |
| 3456 | __core_scsi3_free_registration(dev, pr_reg, NULL, 1); |
| 3457 | spin_unlock(&pr_tmpl->registration_lock); |
| 3458 | } else |
| 3459 | core_scsi3_put_pr_reg(pr_reg); |
| 3460 | |
Andy Grover | 459f213 | 2013-05-16 10:41:02 -0700 | [diff] [blame] | 3461 | core_scsi3_update_and_write_aptpl(cmd->se_dev, aptpl); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 3462 | |
Andy Grover | 4949314 | 2012-01-16 16:57:08 -0800 | [diff] [blame] | 3463 | transport_kunmap_data_sg(cmd); |
Andy Grover | 05d1c7c | 2011-07-20 19:13:28 +0000 | [diff] [blame] | 3464 | |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 3465 | core_scsi3_put_pr_reg(dest_pr_reg); |
| 3466 | return 0; |
| 3467 | out: |
Andy Grover | 05d1c7c | 2011-07-20 19:13:28 +0000 | [diff] [blame] | 3468 | if (buf) |
Andy Grover | 4949314 | 2012-01-16 16:57:08 -0800 | [diff] [blame] | 3469 | transport_kunmap_data_sg(cmd); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 3470 | if (dest_se_deve) |
| 3471 | core_scsi3_lunacl_undepend_item(dest_se_deve); |
| 3472 | if (dest_node_acl) |
| 3473 | core_scsi3_nodeacl_undepend_item(dest_node_acl); |
| 3474 | core_scsi3_tpg_undepend_item(dest_se_tpg); |
Christoph Hellwig | de103c9 | 2012-11-06 12:24:09 -0800 | [diff] [blame] | 3475 | |
| 3476 | out_put_pr_reg: |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 3477 | core_scsi3_put_pr_reg(pr_reg); |
| 3478 | return ret; |
| 3479 | } |
| 3480 | |
| 3481 | static unsigned long long core_scsi3_extract_reservation_key(unsigned char *cdb) |
| 3482 | { |
| 3483 | unsigned int __v1, __v2; |
| 3484 | |
| 3485 | __v1 = (cdb[0] << 24) | (cdb[1] << 16) | (cdb[2] << 8) | cdb[3]; |
| 3486 | __v2 = (cdb[4] << 24) | (cdb[5] << 16) | (cdb[6] << 8) | cdb[7]; |
| 3487 | |
| 3488 | return ((unsigned long long)__v2) | (unsigned long long)__v1 << 32; |
| 3489 | } |
| 3490 | |
| 3491 | /* |
| 3492 | * See spc4r17 section 6.14 Table 170 |
| 3493 | */ |
Christoph Hellwig | de103c9 | 2012-11-06 12:24:09 -0800 | [diff] [blame] | 3494 | sense_reason_t |
| 3495 | target_scsi3_emulate_pr_out(struct se_cmd *cmd) |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 3496 | { |
Christoph Hellwig | 617c0e0 | 2011-11-03 17:50:41 -0400 | [diff] [blame] | 3497 | unsigned char *cdb = &cmd->t_task_cdb[0]; |
Andy Grover | 05d1c7c | 2011-07-20 19:13:28 +0000 | [diff] [blame] | 3498 | unsigned char *buf; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 3499 | u64 res_key, sa_res_key; |
| 3500 | int sa, scope, type, aptpl; |
| 3501 | int spec_i_pt = 0, all_tg_pt = 0, unreg = 0; |
Christoph Hellwig | de103c9 | 2012-11-06 12:24:09 -0800 | [diff] [blame] | 3502 | sense_reason_t ret; |
Christoph Hellwig | 617c0e0 | 2011-11-03 17:50:41 -0400 | [diff] [blame] | 3503 | |
| 3504 | /* |
| 3505 | * Following spc2r20 5.5.1 Reservations overview: |
| 3506 | * |
| 3507 | * If a logical unit has been reserved by any RESERVE command and is |
| 3508 | * still reserved by any initiator, all PERSISTENT RESERVE IN and all |
| 3509 | * PERSISTENT RESERVE OUT commands shall conflict regardless of |
| 3510 | * initiator or service action and shall terminate with a RESERVATION |
| 3511 | * CONFLICT status. |
| 3512 | */ |
Christoph Hellwig | 0fd97cc | 2012-10-08 00:03:19 -0400 | [diff] [blame] | 3513 | if (cmd->se_dev->dev_reservation_flags & DRF_SPC2_RESERVATIONS) { |
Christoph Hellwig | 617c0e0 | 2011-11-03 17:50:41 -0400 | [diff] [blame] | 3514 | pr_err("Received PERSISTENT_RESERVE CDB while legacy" |
| 3515 | " SPC-2 reservation is held, returning" |
| 3516 | " RESERVATION_CONFLICT\n"); |
Christoph Hellwig | de103c9 | 2012-11-06 12:24:09 -0800 | [diff] [blame] | 3517 | return TCM_RESERVATION_CONFLICT; |
Christoph Hellwig | 617c0e0 | 2011-11-03 17:50:41 -0400 | [diff] [blame] | 3518 | } |
| 3519 | |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 3520 | /* |
| 3521 | * FIXME: A NULL struct se_session pointer means an this is not coming from |
| 3522 | * a $FABRIC_MOD's nexus, but from internal passthrough ops. |
| 3523 | */ |
Christoph Hellwig | de103c9 | 2012-11-06 12:24:09 -0800 | [diff] [blame] | 3524 | if (!cmd->se_sess) |
| 3525 | return TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 3526 | |
| 3527 | if (cmd->data_length < 24) { |
Andy Grover | 6708bb2 | 2011-06-08 10:36:43 -0700 | [diff] [blame] | 3528 | pr_warn("SPC-PR: Received PR OUT parameter list" |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 3529 | " length too small: %u\n", cmd->data_length); |
Christoph Hellwig | de103c9 | 2012-11-06 12:24:09 -0800 | [diff] [blame] | 3530 | return TCM_INVALID_PARAMETER_LIST; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 3531 | } |
Christoph Hellwig | de103c9 | 2012-11-06 12:24:09 -0800 | [diff] [blame] | 3532 | |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 3533 | /* |
| 3534 | * From the PERSISTENT_RESERVE_OUT command descriptor block (CDB) |
| 3535 | */ |
| 3536 | sa = (cdb[1] & 0x1f); |
| 3537 | scope = (cdb[2] & 0xf0); |
| 3538 | type = (cdb[2] & 0x0f); |
Andy Grover | 05d1c7c | 2011-07-20 19:13:28 +0000 | [diff] [blame] | 3539 | |
Andy Grover | 4949314 | 2012-01-16 16:57:08 -0800 | [diff] [blame] | 3540 | buf = transport_kmap_data_sg(cmd); |
Christoph Hellwig | de103c9 | 2012-11-06 12:24:09 -0800 | [diff] [blame] | 3541 | if (!buf) |
| 3542 | return TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; |
| 3543 | |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 3544 | /* |
| 3545 | * From PERSISTENT_RESERVE_OUT parameter list (payload) |
| 3546 | */ |
| 3547 | res_key = core_scsi3_extract_reservation_key(&buf[0]); |
| 3548 | sa_res_key = core_scsi3_extract_reservation_key(&buf[8]); |
| 3549 | /* |
| 3550 | * REGISTER_AND_MOVE uses a different SA parameter list containing |
| 3551 | * SCSI TransportIDs. |
| 3552 | */ |
| 3553 | if (sa != PRO_REGISTER_AND_MOVE) { |
| 3554 | spec_i_pt = (buf[20] & 0x08); |
| 3555 | all_tg_pt = (buf[20] & 0x04); |
| 3556 | aptpl = (buf[20] & 0x01); |
| 3557 | } else { |
| 3558 | aptpl = (buf[17] & 0x01); |
| 3559 | unreg = (buf[17] & 0x02); |
| 3560 | } |
Andy Grover | 4949314 | 2012-01-16 16:57:08 -0800 | [diff] [blame] | 3561 | transport_kunmap_data_sg(cmd); |
Andy Grover | 05d1c7c | 2011-07-20 19:13:28 +0000 | [diff] [blame] | 3562 | buf = NULL; |
| 3563 | |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 3564 | /* |
| 3565 | * SPEC_I_PT=1 is only valid for Service action: REGISTER |
| 3566 | */ |
Christoph Hellwig | de103c9 | 2012-11-06 12:24:09 -0800 | [diff] [blame] | 3567 | if (spec_i_pt && ((cdb[1] & 0x1f) != PRO_REGISTER)) |
| 3568 | return TCM_INVALID_PARAMETER_LIST; |
Christoph Hellwig | d29a5b6 | 2011-11-03 17:50:44 -0400 | [diff] [blame] | 3569 | |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 3570 | /* |
| 3571 | * From spc4r17 section 6.14: |
| 3572 | * |
| 3573 | * If the SPEC_I_PT bit is set to zero, the service action is not |
| 3574 | * REGISTER AND MOVE, and the parameter list length is not 24, then |
| 3575 | * the command shall be terminated with CHECK CONDITION status, with |
| 3576 | * the sense key set to ILLEGAL REQUEST, and the additional sense |
| 3577 | * code set to PARAMETER LIST LENGTH ERROR. |
| 3578 | */ |
Andy Grover | 6708bb2 | 2011-06-08 10:36:43 -0700 | [diff] [blame] | 3579 | if (!spec_i_pt && ((cdb[1] & 0x1f) != PRO_REGISTER_AND_MOVE) && |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 3580 | (cmd->data_length != 24)) { |
Andy Grover | 6708bb2 | 2011-06-08 10:36:43 -0700 | [diff] [blame] | 3581 | pr_warn("SPC-PR: Received PR OUT illegal parameter" |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 3582 | " list length: %u\n", cmd->data_length); |
Christoph Hellwig | de103c9 | 2012-11-06 12:24:09 -0800 | [diff] [blame] | 3583 | return TCM_INVALID_PARAMETER_LIST; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 3584 | } |
Christoph Hellwig | de103c9 | 2012-11-06 12:24:09 -0800 | [diff] [blame] | 3585 | |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 3586 | /* |
| 3587 | * (core_scsi3_emulate_pro_* function parameters |
| 3588 | * are defined by spc4r17 Table 174: |
| 3589 | * PERSISTENT_RESERVE_OUT service actions and valid parameters. |
| 3590 | */ |
| 3591 | switch (sa) { |
| 3592 | case PRO_REGISTER: |
Christoph Hellwig | d29a5b6 | 2011-11-03 17:50:44 -0400 | [diff] [blame] | 3593 | ret = core_scsi3_emulate_pro_register(cmd, |
Andy Grover | 33ce6a8 | 2013-05-16 10:40:54 -0700 | [diff] [blame] | 3594 | res_key, sa_res_key, aptpl, all_tg_pt, spec_i_pt, REGISTER); |
Christoph Hellwig | d29a5b6 | 2011-11-03 17:50:44 -0400 | [diff] [blame] | 3595 | break; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 3596 | case PRO_RESERVE: |
Christoph Hellwig | d29a5b6 | 2011-11-03 17:50:44 -0400 | [diff] [blame] | 3597 | ret = core_scsi3_emulate_pro_reserve(cmd, type, scope, res_key); |
| 3598 | break; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 3599 | case PRO_RELEASE: |
Christoph Hellwig | d29a5b6 | 2011-11-03 17:50:44 -0400 | [diff] [blame] | 3600 | ret = core_scsi3_emulate_pro_release(cmd, type, scope, res_key); |
| 3601 | break; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 3602 | case PRO_CLEAR: |
Christoph Hellwig | d29a5b6 | 2011-11-03 17:50:44 -0400 | [diff] [blame] | 3603 | ret = core_scsi3_emulate_pro_clear(cmd, res_key); |
| 3604 | break; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 3605 | case PRO_PREEMPT: |
Christoph Hellwig | d29a5b6 | 2011-11-03 17:50:44 -0400 | [diff] [blame] | 3606 | ret = core_scsi3_emulate_pro_preempt(cmd, type, scope, |
Andy Grover | 33ce6a8 | 2013-05-16 10:40:54 -0700 | [diff] [blame] | 3607 | res_key, sa_res_key, PREEMPT); |
Christoph Hellwig | d29a5b6 | 2011-11-03 17:50:44 -0400 | [diff] [blame] | 3608 | break; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 3609 | case PRO_PREEMPT_AND_ABORT: |
Christoph Hellwig | d29a5b6 | 2011-11-03 17:50:44 -0400 | [diff] [blame] | 3610 | ret = core_scsi3_emulate_pro_preempt(cmd, type, scope, |
Andy Grover | 33ce6a8 | 2013-05-16 10:40:54 -0700 | [diff] [blame] | 3611 | res_key, sa_res_key, PREEMPT_AND_ABORT); |
Christoph Hellwig | d29a5b6 | 2011-11-03 17:50:44 -0400 | [diff] [blame] | 3612 | break; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 3613 | case PRO_REGISTER_AND_IGNORE_EXISTING_KEY: |
Christoph Hellwig | d29a5b6 | 2011-11-03 17:50:44 -0400 | [diff] [blame] | 3614 | ret = core_scsi3_emulate_pro_register(cmd, |
Andy Grover | 33ce6a8 | 2013-05-16 10:40:54 -0700 | [diff] [blame] | 3615 | 0, sa_res_key, aptpl, all_tg_pt, spec_i_pt, REGISTER_AND_IGNORE_EXISTING_KEY); |
Christoph Hellwig | d29a5b6 | 2011-11-03 17:50:44 -0400 | [diff] [blame] | 3616 | break; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 3617 | case PRO_REGISTER_AND_MOVE: |
Christoph Hellwig | d29a5b6 | 2011-11-03 17:50:44 -0400 | [diff] [blame] | 3618 | ret = core_scsi3_emulate_pro_register_and_move(cmd, res_key, |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 3619 | sa_res_key, aptpl, unreg); |
Christoph Hellwig | d29a5b6 | 2011-11-03 17:50:44 -0400 | [diff] [blame] | 3620 | break; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 3621 | default: |
Andy Grover | 6708bb2 | 2011-06-08 10:36:43 -0700 | [diff] [blame] | 3622 | pr_err("Unknown PERSISTENT_RESERVE_OUT service" |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 3623 | " action: 0x%02x\n", cdb[1] & 0x1f); |
Christoph Hellwig | de103c9 | 2012-11-06 12:24:09 -0800 | [diff] [blame] | 3624 | return TCM_INVALID_CDB_FIELD; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 3625 | } |
| 3626 | |
Christoph Hellwig | 6bb35e0 | 2012-04-23 11:35:33 -0400 | [diff] [blame] | 3627 | if (!ret) |
| 3628 | target_complete_cmd(cmd, GOOD); |
Christoph Hellwig | d29a5b6 | 2011-11-03 17:50:44 -0400 | [diff] [blame] | 3629 | return ret; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 3630 | } |
| 3631 | |
| 3632 | /* |
| 3633 | * PERSISTENT_RESERVE_IN Service Action READ_KEYS |
| 3634 | * |
| 3635 | * See spc4r17 section 5.7.6.2 and section 6.13.2, Table 160 |
| 3636 | */ |
Christoph Hellwig | de103c9 | 2012-11-06 12:24:09 -0800 | [diff] [blame] | 3637 | static sense_reason_t |
| 3638 | core_scsi3_pri_read_keys(struct se_cmd *cmd) |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 3639 | { |
Christoph Hellwig | 0fd97cc | 2012-10-08 00:03:19 -0400 | [diff] [blame] | 3640 | struct se_device *dev = cmd->se_dev; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 3641 | struct t10_pr_registration *pr_reg; |
Andy Grover | 05d1c7c | 2011-07-20 19:13:28 +0000 | [diff] [blame] | 3642 | unsigned char *buf; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 3643 | u32 add_len = 0, off = 8; |
| 3644 | |
| 3645 | if (cmd->data_length < 8) { |
Andy Grover | 6708bb2 | 2011-06-08 10:36:43 -0700 | [diff] [blame] | 3646 | pr_err("PRIN SA READ_KEYS SCSI Data Length: %u" |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 3647 | " too small\n", cmd->data_length); |
Christoph Hellwig | de103c9 | 2012-11-06 12:24:09 -0800 | [diff] [blame] | 3648 | return TCM_INVALID_CDB_FIELD; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 3649 | } |
| 3650 | |
Andy Grover | 4949314 | 2012-01-16 16:57:08 -0800 | [diff] [blame] | 3651 | buf = transport_kmap_data_sg(cmd); |
Christoph Hellwig | de103c9 | 2012-11-06 12:24:09 -0800 | [diff] [blame] | 3652 | if (!buf) |
| 3653 | return TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; |
| 3654 | |
Christoph Hellwig | 0fd97cc | 2012-10-08 00:03:19 -0400 | [diff] [blame] | 3655 | buf[0] = ((dev->t10_pr.pr_generation >> 24) & 0xff); |
| 3656 | buf[1] = ((dev->t10_pr.pr_generation >> 16) & 0xff); |
| 3657 | buf[2] = ((dev->t10_pr.pr_generation >> 8) & 0xff); |
| 3658 | buf[3] = (dev->t10_pr.pr_generation & 0xff); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 3659 | |
Christoph Hellwig | 0fd97cc | 2012-10-08 00:03:19 -0400 | [diff] [blame] | 3660 | spin_lock(&dev->t10_pr.registration_lock); |
| 3661 | list_for_each_entry(pr_reg, &dev->t10_pr.registration_list, |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 3662 | pr_reg_list) { |
| 3663 | /* |
| 3664 | * Check for overflow of 8byte PRI READ_KEYS payload and |
| 3665 | * next reservation key list descriptor. |
| 3666 | */ |
| 3667 | if ((add_len + 8) > (cmd->data_length - 8)) |
| 3668 | break; |
| 3669 | |
| 3670 | buf[off++] = ((pr_reg->pr_res_key >> 56) & 0xff); |
| 3671 | buf[off++] = ((pr_reg->pr_res_key >> 48) & 0xff); |
| 3672 | buf[off++] = ((pr_reg->pr_res_key >> 40) & 0xff); |
| 3673 | buf[off++] = ((pr_reg->pr_res_key >> 32) & 0xff); |
| 3674 | buf[off++] = ((pr_reg->pr_res_key >> 24) & 0xff); |
| 3675 | buf[off++] = ((pr_reg->pr_res_key >> 16) & 0xff); |
| 3676 | buf[off++] = ((pr_reg->pr_res_key >> 8) & 0xff); |
| 3677 | buf[off++] = (pr_reg->pr_res_key & 0xff); |
| 3678 | |
| 3679 | add_len += 8; |
| 3680 | } |
Christoph Hellwig | 0fd97cc | 2012-10-08 00:03:19 -0400 | [diff] [blame] | 3681 | spin_unlock(&dev->t10_pr.registration_lock); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 3682 | |
| 3683 | buf[4] = ((add_len >> 24) & 0xff); |
| 3684 | buf[5] = ((add_len >> 16) & 0xff); |
| 3685 | buf[6] = ((add_len >> 8) & 0xff); |
| 3686 | buf[7] = (add_len & 0xff); |
| 3687 | |
Andy Grover | 4949314 | 2012-01-16 16:57:08 -0800 | [diff] [blame] | 3688 | transport_kunmap_data_sg(cmd); |
Andy Grover | 05d1c7c | 2011-07-20 19:13:28 +0000 | [diff] [blame] | 3689 | |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 3690 | return 0; |
| 3691 | } |
| 3692 | |
| 3693 | /* |
| 3694 | * PERSISTENT_RESERVE_IN Service Action READ_RESERVATION |
| 3695 | * |
| 3696 | * See spc4r17 section 5.7.6.3 and section 6.13.3.2 Table 161 and 162 |
| 3697 | */ |
Christoph Hellwig | de103c9 | 2012-11-06 12:24:09 -0800 | [diff] [blame] | 3698 | static sense_reason_t |
| 3699 | core_scsi3_pri_read_reservation(struct se_cmd *cmd) |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 3700 | { |
Christoph Hellwig | 0fd97cc | 2012-10-08 00:03:19 -0400 | [diff] [blame] | 3701 | struct se_device *dev = cmd->se_dev; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 3702 | struct t10_pr_registration *pr_reg; |
Andy Grover | 05d1c7c | 2011-07-20 19:13:28 +0000 | [diff] [blame] | 3703 | unsigned char *buf; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 3704 | u64 pr_res_key; |
| 3705 | u32 add_len = 16; /* Hardcoded to 16 when a reservation is held. */ |
| 3706 | |
| 3707 | if (cmd->data_length < 8) { |
Andy Grover | 6708bb2 | 2011-06-08 10:36:43 -0700 | [diff] [blame] | 3708 | pr_err("PRIN SA READ_RESERVATIONS SCSI Data Length: %u" |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 3709 | " too small\n", cmd->data_length); |
Christoph Hellwig | de103c9 | 2012-11-06 12:24:09 -0800 | [diff] [blame] | 3710 | return TCM_INVALID_CDB_FIELD; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 3711 | } |
| 3712 | |
Andy Grover | 4949314 | 2012-01-16 16:57:08 -0800 | [diff] [blame] | 3713 | buf = transport_kmap_data_sg(cmd); |
Christoph Hellwig | de103c9 | 2012-11-06 12:24:09 -0800 | [diff] [blame] | 3714 | if (!buf) |
| 3715 | return TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; |
| 3716 | |
Christoph Hellwig | 0fd97cc | 2012-10-08 00:03:19 -0400 | [diff] [blame] | 3717 | buf[0] = ((dev->t10_pr.pr_generation >> 24) & 0xff); |
| 3718 | buf[1] = ((dev->t10_pr.pr_generation >> 16) & 0xff); |
| 3719 | buf[2] = ((dev->t10_pr.pr_generation >> 8) & 0xff); |
| 3720 | buf[3] = (dev->t10_pr.pr_generation & 0xff); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 3721 | |
Christoph Hellwig | 0fd97cc | 2012-10-08 00:03:19 -0400 | [diff] [blame] | 3722 | spin_lock(&dev->dev_reservation_lock); |
| 3723 | pr_reg = dev->dev_pr_res_holder; |
Andy Grover | ee1b1b9 | 2012-07-12 17:34:54 -0700 | [diff] [blame] | 3724 | if (pr_reg) { |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 3725 | /* |
| 3726 | * Set the hardcoded Additional Length |
| 3727 | */ |
| 3728 | buf[4] = ((add_len >> 24) & 0xff); |
| 3729 | buf[5] = ((add_len >> 16) & 0xff); |
| 3730 | buf[6] = ((add_len >> 8) & 0xff); |
| 3731 | buf[7] = (add_len & 0xff); |
| 3732 | |
Andy Grover | 05d1c7c | 2011-07-20 19:13:28 +0000 | [diff] [blame] | 3733 | if (cmd->data_length < 22) |
| 3734 | goto err; |
| 3735 | |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 3736 | /* |
| 3737 | * Set the Reservation key. |
| 3738 | * |
| 3739 | * From spc4r17, section 5.7.10: |
| 3740 | * A persistent reservation holder has its reservation key |
| 3741 | * returned in the parameter data from a PERSISTENT |
| 3742 | * RESERVE IN command with READ RESERVATION service action as |
| 3743 | * follows: |
| 3744 | * a) For a persistent reservation of the type Write Exclusive |
| 3745 | * - All Registrants or Exclusive Access  All Regitrants, |
| 3746 | * the reservation key shall be set to zero; or |
| 3747 | * b) For all other persistent reservation types, the |
| 3748 | * reservation key shall be set to the registered |
| 3749 | * reservation key for the I_T nexus that holds the |
| 3750 | * persistent reservation. |
| 3751 | */ |
| 3752 | if ((pr_reg->pr_res_type == PR_TYPE_WRITE_EXCLUSIVE_ALLREG) || |
| 3753 | (pr_reg->pr_res_type == PR_TYPE_EXCLUSIVE_ACCESS_ALLREG)) |
| 3754 | pr_res_key = 0; |
| 3755 | else |
| 3756 | pr_res_key = pr_reg->pr_res_key; |
| 3757 | |
| 3758 | buf[8] = ((pr_res_key >> 56) & 0xff); |
| 3759 | buf[9] = ((pr_res_key >> 48) & 0xff); |
| 3760 | buf[10] = ((pr_res_key >> 40) & 0xff); |
| 3761 | buf[11] = ((pr_res_key >> 32) & 0xff); |
| 3762 | buf[12] = ((pr_res_key >> 24) & 0xff); |
| 3763 | buf[13] = ((pr_res_key >> 16) & 0xff); |
| 3764 | buf[14] = ((pr_res_key >> 8) & 0xff); |
| 3765 | buf[15] = (pr_res_key & 0xff); |
| 3766 | /* |
| 3767 | * Set the SCOPE and TYPE |
| 3768 | */ |
| 3769 | buf[21] = (pr_reg->pr_res_scope & 0xf0) | |
| 3770 | (pr_reg->pr_res_type & 0x0f); |
| 3771 | } |
Andy Grover | 05d1c7c | 2011-07-20 19:13:28 +0000 | [diff] [blame] | 3772 | |
| 3773 | err: |
Christoph Hellwig | 0fd97cc | 2012-10-08 00:03:19 -0400 | [diff] [blame] | 3774 | spin_unlock(&dev->dev_reservation_lock); |
Andy Grover | 4949314 | 2012-01-16 16:57:08 -0800 | [diff] [blame] | 3775 | transport_kunmap_data_sg(cmd); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 3776 | |
| 3777 | return 0; |
| 3778 | } |
| 3779 | |
| 3780 | /* |
| 3781 | * PERSISTENT_RESERVE_IN Service Action REPORT_CAPABILITIES |
| 3782 | * |
| 3783 | * See spc4r17 section 6.13.4 Table 165 |
| 3784 | */ |
Christoph Hellwig | de103c9 | 2012-11-06 12:24:09 -0800 | [diff] [blame] | 3785 | static sense_reason_t |
| 3786 | core_scsi3_pri_report_capabilities(struct se_cmd *cmd) |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 3787 | { |
Andy Grover | 5951146d | 2011-07-19 10:26:37 +0000 | [diff] [blame] | 3788 | struct se_device *dev = cmd->se_dev; |
Christoph Hellwig | 0fd97cc | 2012-10-08 00:03:19 -0400 | [diff] [blame] | 3789 | struct t10_reservation *pr_tmpl = &dev->t10_pr; |
Andy Grover | 05d1c7c | 2011-07-20 19:13:28 +0000 | [diff] [blame] | 3790 | unsigned char *buf; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 3791 | u16 add_len = 8; /* Hardcoded to 8. */ |
| 3792 | |
| 3793 | if (cmd->data_length < 6) { |
Andy Grover | 6708bb2 | 2011-06-08 10:36:43 -0700 | [diff] [blame] | 3794 | pr_err("PRIN SA REPORT_CAPABILITIES SCSI Data Length:" |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 3795 | " %u too small\n", cmd->data_length); |
Christoph Hellwig | de103c9 | 2012-11-06 12:24:09 -0800 | [diff] [blame] | 3796 | return TCM_INVALID_CDB_FIELD; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 3797 | } |
| 3798 | |
Andy Grover | 4949314 | 2012-01-16 16:57:08 -0800 | [diff] [blame] | 3799 | buf = transport_kmap_data_sg(cmd); |
Christoph Hellwig | de103c9 | 2012-11-06 12:24:09 -0800 | [diff] [blame] | 3800 | if (!buf) |
| 3801 | return TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; |
Andy Grover | 05d1c7c | 2011-07-20 19:13:28 +0000 | [diff] [blame] | 3802 | |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 3803 | buf[0] = ((add_len << 8) & 0xff); |
| 3804 | buf[1] = (add_len & 0xff); |
| 3805 | buf[2] |= 0x10; /* CRH: Compatible Reservation Hanlding bit. */ |
| 3806 | buf[2] |= 0x08; /* SIP_C: Specify Initiator Ports Capable bit */ |
| 3807 | buf[2] |= 0x04; /* ATP_C: All Target Ports Capable bit */ |
| 3808 | buf[2] |= 0x01; /* PTPL_C: Persistence across Target Power Loss bit */ |
| 3809 | /* |
| 3810 | * We are filling in the PERSISTENT RESERVATION TYPE MASK below, so |
| 3811 | * set the TMV: Task Mask Valid bit. |
| 3812 | */ |
| 3813 | buf[3] |= 0x80; |
| 3814 | /* |
| 3815 | * Change ALLOW COMMANDs to 0x20 or 0x40 later from Table 166 |
| 3816 | */ |
| 3817 | buf[3] |= 0x10; /* ALLOW COMMANDs field 001b */ |
| 3818 | /* |
| 3819 | * PTPL_A: Persistence across Target Power Loss Active bit |
| 3820 | */ |
| 3821 | if (pr_tmpl->pr_aptpl_active) |
| 3822 | buf[3] |= 0x01; |
| 3823 | /* |
| 3824 | * Setup the PERSISTENT RESERVATION TYPE MASK from Table 167 |
| 3825 | */ |
| 3826 | buf[4] |= 0x80; /* PR_TYPE_EXCLUSIVE_ACCESS_ALLREG */ |
| 3827 | buf[4] |= 0x40; /* PR_TYPE_EXCLUSIVE_ACCESS_REGONLY */ |
| 3828 | buf[4] |= 0x20; /* PR_TYPE_WRITE_EXCLUSIVE_REGONLY */ |
| 3829 | buf[4] |= 0x08; /* PR_TYPE_EXCLUSIVE_ACCESS */ |
| 3830 | buf[4] |= 0x02; /* PR_TYPE_WRITE_EXCLUSIVE */ |
| 3831 | buf[5] |= 0x01; /* PR_TYPE_EXCLUSIVE_ACCESS_ALLREG */ |
| 3832 | |
Andy Grover | 4949314 | 2012-01-16 16:57:08 -0800 | [diff] [blame] | 3833 | transport_kunmap_data_sg(cmd); |
Andy Grover | 05d1c7c | 2011-07-20 19:13:28 +0000 | [diff] [blame] | 3834 | |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 3835 | return 0; |
| 3836 | } |
| 3837 | |
| 3838 | /* |
| 3839 | * PERSISTENT_RESERVE_IN Service Action READ_FULL_STATUS |
| 3840 | * |
| 3841 | * See spc4r17 section 6.13.5 Table 168 and 169 |
| 3842 | */ |
Christoph Hellwig | de103c9 | 2012-11-06 12:24:09 -0800 | [diff] [blame] | 3843 | static sense_reason_t |
| 3844 | core_scsi3_pri_read_full_status(struct se_cmd *cmd) |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 3845 | { |
Christoph Hellwig | 0fd97cc | 2012-10-08 00:03:19 -0400 | [diff] [blame] | 3846 | struct se_device *dev = cmd->se_dev; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 3847 | struct se_node_acl *se_nacl; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 3848 | struct se_portal_group *se_tpg; |
| 3849 | struct t10_pr_registration *pr_reg, *pr_reg_tmp; |
Christoph Hellwig | 0fd97cc | 2012-10-08 00:03:19 -0400 | [diff] [blame] | 3850 | struct t10_reservation *pr_tmpl = &dev->t10_pr; |
Andy Grover | 05d1c7c | 2011-07-20 19:13:28 +0000 | [diff] [blame] | 3851 | unsigned char *buf; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 3852 | u32 add_desc_len = 0, add_len = 0, desc_len, exp_desc_len; |
| 3853 | u32 off = 8; /* off into first Full Status descriptor */ |
| 3854 | int format_code = 0; |
| 3855 | |
| 3856 | if (cmd->data_length < 8) { |
Andy Grover | 6708bb2 | 2011-06-08 10:36:43 -0700 | [diff] [blame] | 3857 | pr_err("PRIN SA READ_FULL_STATUS SCSI Data Length: %u" |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 3858 | " too small\n", cmd->data_length); |
Christoph Hellwig | de103c9 | 2012-11-06 12:24:09 -0800 | [diff] [blame] | 3859 | return TCM_INVALID_CDB_FIELD; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 3860 | } |
| 3861 | |
Andy Grover | 4949314 | 2012-01-16 16:57:08 -0800 | [diff] [blame] | 3862 | buf = transport_kmap_data_sg(cmd); |
Christoph Hellwig | de103c9 | 2012-11-06 12:24:09 -0800 | [diff] [blame] | 3863 | if (!buf) |
| 3864 | return TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; |
Andy Grover | 05d1c7c | 2011-07-20 19:13:28 +0000 | [diff] [blame] | 3865 | |
Christoph Hellwig | 0fd97cc | 2012-10-08 00:03:19 -0400 | [diff] [blame] | 3866 | buf[0] = ((dev->t10_pr.pr_generation >> 24) & 0xff); |
| 3867 | buf[1] = ((dev->t10_pr.pr_generation >> 16) & 0xff); |
| 3868 | buf[2] = ((dev->t10_pr.pr_generation >> 8) & 0xff); |
| 3869 | buf[3] = (dev->t10_pr.pr_generation & 0xff); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 3870 | |
| 3871 | spin_lock(&pr_tmpl->registration_lock); |
| 3872 | list_for_each_entry_safe(pr_reg, pr_reg_tmp, |
| 3873 | &pr_tmpl->registration_list, pr_reg_list) { |
| 3874 | |
| 3875 | se_nacl = pr_reg->pr_reg_nacl; |
| 3876 | se_tpg = pr_reg->pr_reg_nacl->se_tpg; |
| 3877 | add_desc_len = 0; |
| 3878 | |
| 3879 | atomic_inc(&pr_reg->pr_res_holders); |
| 3880 | smp_mb__after_atomic_inc(); |
| 3881 | spin_unlock(&pr_tmpl->registration_lock); |
| 3882 | /* |
| 3883 | * Determine expected length of $FABRIC_MOD specific |
| 3884 | * TransportID full status descriptor.. |
| 3885 | */ |
Andy Grover | e3d6f90 | 2011-07-19 08:55:10 +0000 | [diff] [blame] | 3886 | exp_desc_len = se_tpg->se_tpg_tfo->tpg_get_pr_transport_id_len( |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 3887 | se_tpg, se_nacl, pr_reg, &format_code); |
| 3888 | |
| 3889 | if ((exp_desc_len + add_len) > cmd->data_length) { |
Andy Grover | 6708bb2 | 2011-06-08 10:36:43 -0700 | [diff] [blame] | 3890 | pr_warn("SPC-3 PRIN READ_FULL_STATUS ran" |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 3891 | " out of buffer: %d\n", cmd->data_length); |
| 3892 | spin_lock(&pr_tmpl->registration_lock); |
| 3893 | atomic_dec(&pr_reg->pr_res_holders); |
| 3894 | smp_mb__after_atomic_dec(); |
| 3895 | break; |
| 3896 | } |
| 3897 | /* |
| 3898 | * Set RESERVATION KEY |
| 3899 | */ |
| 3900 | buf[off++] = ((pr_reg->pr_res_key >> 56) & 0xff); |
| 3901 | buf[off++] = ((pr_reg->pr_res_key >> 48) & 0xff); |
| 3902 | buf[off++] = ((pr_reg->pr_res_key >> 40) & 0xff); |
| 3903 | buf[off++] = ((pr_reg->pr_res_key >> 32) & 0xff); |
| 3904 | buf[off++] = ((pr_reg->pr_res_key >> 24) & 0xff); |
| 3905 | buf[off++] = ((pr_reg->pr_res_key >> 16) & 0xff); |
| 3906 | buf[off++] = ((pr_reg->pr_res_key >> 8) & 0xff); |
| 3907 | buf[off++] = (pr_reg->pr_res_key & 0xff); |
| 3908 | off += 4; /* Skip Over Reserved area */ |
| 3909 | |
| 3910 | /* |
| 3911 | * Set ALL_TG_PT bit if PROUT SA REGISTER had this set. |
| 3912 | */ |
| 3913 | if (pr_reg->pr_reg_all_tg_pt) |
| 3914 | buf[off] = 0x02; |
| 3915 | /* |
| 3916 | * The struct se_lun pointer will be present for the |
| 3917 | * reservation holder for PR_HOLDER bit. |
| 3918 | * |
| 3919 | * Also, if this registration is the reservation |
| 3920 | * holder, fill in SCOPE and TYPE in the next byte. |
| 3921 | */ |
| 3922 | if (pr_reg->pr_res_holder) { |
| 3923 | buf[off++] |= 0x01; |
| 3924 | buf[off++] = (pr_reg->pr_res_scope & 0xf0) | |
| 3925 | (pr_reg->pr_res_type & 0x0f); |
| 3926 | } else |
| 3927 | off += 2; |
| 3928 | |
| 3929 | off += 4; /* Skip over reserved area */ |
| 3930 | /* |
| 3931 | * From spc4r17 6.3.15: |
| 3932 | * |
| 3933 | * If the ALL_TG_PT bit set to zero, the RELATIVE TARGET PORT |
| 3934 | * IDENTIFIER field contains the relative port identifier (see |
| 3935 | * 3.1.120) of the target port that is part of the I_T nexus |
| 3936 | * described by this full status descriptor. If the ALL_TG_PT |
| 3937 | * bit is set to one, the contents of the RELATIVE TARGET PORT |
| 3938 | * IDENTIFIER field are not defined by this standard. |
| 3939 | */ |
Andy Grover | 6708bb2 | 2011-06-08 10:36:43 -0700 | [diff] [blame] | 3940 | if (!pr_reg->pr_reg_all_tg_pt) { |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 3941 | struct se_port *port = pr_reg->pr_reg_tg_pt_lun->lun_sep; |
| 3942 | |
| 3943 | buf[off++] = ((port->sep_rtpi >> 8) & 0xff); |
| 3944 | buf[off++] = (port->sep_rtpi & 0xff); |
| 3945 | } else |
Masanari Iida | 35d1efe | 2012-08-16 22:43:13 +0900 | [diff] [blame] | 3946 | off += 2; /* Skip over RELATIVE TARGET PORT IDENTIFIER */ |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 3947 | |
| 3948 | /* |
| 3949 | * Now, have the $FABRIC_MOD fill in the protocol identifier |
| 3950 | */ |
Andy Grover | e3d6f90 | 2011-07-19 08:55:10 +0000 | [diff] [blame] | 3951 | desc_len = se_tpg->se_tpg_tfo->tpg_get_pr_transport_id(se_tpg, |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 3952 | se_nacl, pr_reg, &format_code, &buf[off+4]); |
| 3953 | |
| 3954 | spin_lock(&pr_tmpl->registration_lock); |
| 3955 | atomic_dec(&pr_reg->pr_res_holders); |
| 3956 | smp_mb__after_atomic_dec(); |
| 3957 | /* |
| 3958 | * Set the ADDITIONAL DESCRIPTOR LENGTH |
| 3959 | */ |
| 3960 | buf[off++] = ((desc_len >> 24) & 0xff); |
| 3961 | buf[off++] = ((desc_len >> 16) & 0xff); |
| 3962 | buf[off++] = ((desc_len >> 8) & 0xff); |
| 3963 | buf[off++] = (desc_len & 0xff); |
| 3964 | /* |
| 3965 | * Size of full desctipor header minus TransportID |
| 3966 | * containing $FABRIC_MOD specific) initiator device/port |
| 3967 | * WWN information. |
| 3968 | * |
| 3969 | * See spc4r17 Section 6.13.5 Table 169 |
| 3970 | */ |
| 3971 | add_desc_len = (24 + desc_len); |
| 3972 | |
| 3973 | off += desc_len; |
| 3974 | add_len += add_desc_len; |
| 3975 | } |
| 3976 | spin_unlock(&pr_tmpl->registration_lock); |
| 3977 | /* |
| 3978 | * Set ADDITIONAL_LENGTH |
| 3979 | */ |
| 3980 | buf[4] = ((add_len >> 24) & 0xff); |
| 3981 | buf[5] = ((add_len >> 16) & 0xff); |
| 3982 | buf[6] = ((add_len >> 8) & 0xff); |
| 3983 | buf[7] = (add_len & 0xff); |
| 3984 | |
Andy Grover | 4949314 | 2012-01-16 16:57:08 -0800 | [diff] [blame] | 3985 | transport_kunmap_data_sg(cmd); |
Andy Grover | 05d1c7c | 2011-07-20 19:13:28 +0000 | [diff] [blame] | 3986 | |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 3987 | return 0; |
| 3988 | } |
| 3989 | |
Christoph Hellwig | de103c9 | 2012-11-06 12:24:09 -0800 | [diff] [blame] | 3990 | sense_reason_t |
| 3991 | target_scsi3_emulate_pr_in(struct se_cmd *cmd) |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 3992 | { |
Christoph Hellwig | de103c9 | 2012-11-06 12:24:09 -0800 | [diff] [blame] | 3993 | sense_reason_t ret; |
Christoph Hellwig | e76a35d | 2011-11-03 17:50:42 -0400 | [diff] [blame] | 3994 | |
Christoph Hellwig | 617c0e0 | 2011-11-03 17:50:41 -0400 | [diff] [blame] | 3995 | /* |
| 3996 | * Following spc2r20 5.5.1 Reservations overview: |
| 3997 | * |
| 3998 | * If a logical unit has been reserved by any RESERVE command and is |
| 3999 | * still reserved by any initiator, all PERSISTENT RESERVE IN and all |
| 4000 | * PERSISTENT RESERVE OUT commands shall conflict regardless of |
| 4001 | * initiator or service action and shall terminate with a RESERVATION |
| 4002 | * CONFLICT status. |
| 4003 | */ |
Christoph Hellwig | 0fd97cc | 2012-10-08 00:03:19 -0400 | [diff] [blame] | 4004 | if (cmd->se_dev->dev_reservation_flags & DRF_SPC2_RESERVATIONS) { |
Christoph Hellwig | 617c0e0 | 2011-11-03 17:50:41 -0400 | [diff] [blame] | 4005 | pr_err("Received PERSISTENT_RESERVE CDB while legacy" |
| 4006 | " SPC-2 reservation is held, returning" |
| 4007 | " RESERVATION_CONFLICT\n"); |
Christoph Hellwig | de103c9 | 2012-11-06 12:24:09 -0800 | [diff] [blame] | 4008 | return TCM_RESERVATION_CONFLICT; |
Christoph Hellwig | 617c0e0 | 2011-11-03 17:50:41 -0400 | [diff] [blame] | 4009 | } |
| 4010 | |
| 4011 | switch (cmd->t_task_cdb[1] & 0x1f) { |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 4012 | case PRI_READ_KEYS: |
Christoph Hellwig | d29a5b6 | 2011-11-03 17:50:44 -0400 | [diff] [blame] | 4013 | ret = core_scsi3_pri_read_keys(cmd); |
| 4014 | break; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 4015 | case PRI_READ_RESERVATION: |
Christoph Hellwig | d29a5b6 | 2011-11-03 17:50:44 -0400 | [diff] [blame] | 4016 | ret = core_scsi3_pri_read_reservation(cmd); |
| 4017 | break; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 4018 | case PRI_REPORT_CAPABILITIES: |
Christoph Hellwig | d29a5b6 | 2011-11-03 17:50:44 -0400 | [diff] [blame] | 4019 | ret = core_scsi3_pri_report_capabilities(cmd); |
| 4020 | break; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 4021 | case PRI_READ_FULL_STATUS: |
Christoph Hellwig | d29a5b6 | 2011-11-03 17:50:44 -0400 | [diff] [blame] | 4022 | ret = core_scsi3_pri_read_full_status(cmd); |
| 4023 | break; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 4024 | default: |
Andy Grover | 6708bb2 | 2011-06-08 10:36:43 -0700 | [diff] [blame] | 4025 | pr_err("Unknown PERSISTENT_RESERVE_IN service" |
Christoph Hellwig | 617c0e0 | 2011-11-03 17:50:41 -0400 | [diff] [blame] | 4026 | " action: 0x%02x\n", cmd->t_task_cdb[1] & 0x1f); |
Christoph Hellwig | de103c9 | 2012-11-06 12:24:09 -0800 | [diff] [blame] | 4027 | return TCM_INVALID_CDB_FIELD; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 4028 | } |
Christoph Hellwig | d29a5b6 | 2011-11-03 17:50:44 -0400 | [diff] [blame] | 4029 | |
Christoph Hellwig | 6bb35e0 | 2012-04-23 11:35:33 -0400 | [diff] [blame] | 4030 | if (!ret) |
| 4031 | target_complete_cmd(cmd, GOOD); |
Christoph Hellwig | d29a5b6 | 2011-11-03 17:50:44 -0400 | [diff] [blame] | 4032 | return ret; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 4033 | } |
| 4034 | |
Christoph Hellwig | de103c9 | 2012-11-06 12:24:09 -0800 | [diff] [blame] | 4035 | sense_reason_t |
| 4036 | target_check_reservation(struct se_cmd *cmd) |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 4037 | { |
Christoph Hellwig | d977f43 | 2012-10-10 17:37:15 -0400 | [diff] [blame] | 4038 | struct se_device *dev = cmd->se_dev; |
Christoph Hellwig | de103c9 | 2012-11-06 12:24:09 -0800 | [diff] [blame] | 4039 | sense_reason_t ret; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 4040 | |
Christoph Hellwig | d977f43 | 2012-10-10 17:37:15 -0400 | [diff] [blame] | 4041 | if (!cmd->se_sess) |
| 4042 | return 0; |
| 4043 | if (dev->se_hba->hba_flags & HBA_FLAGS_INTERNAL_USE) |
| 4044 | return 0; |
| 4045 | if (dev->transport->transport_type == TRANSPORT_PLUGIN_PHBA_PDEV) |
| 4046 | return 0; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 4047 | |
Christoph Hellwig | d977f43 | 2012-10-10 17:37:15 -0400 | [diff] [blame] | 4048 | spin_lock(&dev->dev_reservation_lock); |
| 4049 | if (dev->dev_reservation_flags & DRF_SPC2_RESERVATIONS) |
| 4050 | ret = target_scsi2_reservation_check(cmd); |
| 4051 | else |
| 4052 | ret = target_scsi3_pr_reservation_check(cmd); |
| 4053 | spin_unlock(&dev->dev_reservation_lock); |
Christoph Hellwig | 0fd97cc | 2012-10-08 00:03:19 -0400 | [diff] [blame] | 4054 | |
Christoph Hellwig | d977f43 | 2012-10-10 17:37:15 -0400 | [diff] [blame] | 4055 | return ret; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 4056 | } |