Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 1 | /******************************************************************************* |
| 2 | * Filename: target_core_tpg.c |
| 3 | * |
| 4 | * This file contains generic Target Portal Group related functions. |
| 5 | * |
Nicholas Bellinger | 4c76251 | 2013-09-05 15:29:12 -0700 | [diff] [blame] | 6 | * (c) Copyright 2002-2013 Datera, Inc. |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 7 | * |
| 8 | * Nicholas A. Bellinger <nab@kernel.org> |
| 9 | * |
| 10 | * This program is free software; you can redistribute it and/or modify |
| 11 | * it under the terms of the GNU General Public License as published by |
| 12 | * the Free Software Foundation; either version 2 of the License, or |
| 13 | * (at your option) any later version. |
| 14 | * |
| 15 | * This program is distributed in the hope that it will be useful, |
| 16 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 17 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 18 | * GNU General Public License for more details. |
| 19 | * |
| 20 | * You should have received a copy of the GNU General Public License |
| 21 | * along with this program; if not, write to the Free Software |
| 22 | * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. |
| 23 | * |
| 24 | ******************************************************************************/ |
| 25 | |
| 26 | #include <linux/net.h> |
| 27 | #include <linux/string.h> |
| 28 | #include <linux/timer.h> |
| 29 | #include <linux/slab.h> |
| 30 | #include <linux/spinlock.h> |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 31 | #include <linux/in.h> |
Paul Gortmaker | c53181a | 2011-08-30 18:16:43 -0400 | [diff] [blame] | 32 | #include <linux/export.h> |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 33 | #include <net/sock.h> |
| 34 | #include <net/tcp.h> |
Bart Van Assche | ba92999 | 2015-05-08 10:11:12 +0200 | [diff] [blame] | 35 | #include <scsi/scsi_proto.h> |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 36 | |
| 37 | #include <target/target_core_base.h> |
Christoph Hellwig | c4795fb | 2011-11-16 09:46:48 -0500 | [diff] [blame] | 38 | #include <target/target_core_backend.h> |
| 39 | #include <target/target_core_fabric.h> |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 40 | |
Christoph Hellwig | e26d99a | 2011-11-14 12:30:30 -0500 | [diff] [blame] | 41 | #include "target_core_internal.h" |
Christoph Hellwig | adf653f | 2015-05-25 21:33:08 -0700 | [diff] [blame] | 42 | #include "target_core_alua.h" |
Nicholas Bellinger | e248056 | 2014-10-04 04:23:15 +0000 | [diff] [blame] | 43 | #include "target_core_pr.h" |
Hannes Reinecke | e986a35 | 2015-06-18 11:43:38 +0200 | [diff] [blame] | 44 | #include "target_core_ua.h" |
Andy Grover | e3d6f90 | 2011-07-19 08:55:10 +0000 | [diff] [blame] | 45 | |
| 46 | extern struct se_device *g_lun0_dev; |
| 47 | |
| 48 | static DEFINE_SPINLOCK(tpg_lock); |
| 49 | static LIST_HEAD(tpg_list); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 50 | |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 51 | /* __core_tpg_get_initiator_node_acl(): |
| 52 | * |
Nicholas Bellinger | 403edd7 | 2015-03-08 22:33:47 +0000 | [diff] [blame] | 53 | * mutex_lock(&tpg->acl_node_mutex); must be held when calling |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 54 | */ |
| 55 | struct se_node_acl *__core_tpg_get_initiator_node_acl( |
| 56 | struct se_portal_group *tpg, |
| 57 | const char *initiatorname) |
| 58 | { |
| 59 | struct se_node_acl *acl; |
| 60 | |
| 61 | list_for_each_entry(acl, &tpg->acl_node_list, acl_list) { |
Andy Grover | 6708bb2 | 2011-06-08 10:36:43 -0700 | [diff] [blame] | 62 | if (!strcmp(acl->initiatorname, initiatorname)) |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 63 | return acl; |
| 64 | } |
| 65 | |
| 66 | return NULL; |
| 67 | } |
| 68 | |
| 69 | /* core_tpg_get_initiator_node_acl(): |
| 70 | * |
| 71 | * |
| 72 | */ |
| 73 | struct se_node_acl *core_tpg_get_initiator_node_acl( |
| 74 | struct se_portal_group *tpg, |
| 75 | unsigned char *initiatorname) |
| 76 | { |
| 77 | struct se_node_acl *acl; |
Nicholas Bellinger | 21aaa23 | 2016-01-07 22:09:27 -0800 | [diff] [blame] | 78 | /* |
| 79 | * Obtain se_node_acl->acl_kref using fabric driver provided |
| 80 | * initiatorname[] during node acl endpoint lookup driven by |
| 81 | * new se_session login. |
| 82 | * |
| 83 | * The reference is held until se_session shutdown -> release |
| 84 | * occurs via fabric driver invoked transport_deregister_session() |
| 85 | * or transport_free_session() code. |
| 86 | */ |
Nicholas Bellinger | 403edd7 | 2015-03-08 22:33:47 +0000 | [diff] [blame] | 87 | mutex_lock(&tpg->acl_node_mutex); |
Nicholas Bellinger | fcf2948 | 2013-02-18 18:00:33 -0800 | [diff] [blame] | 88 | acl = __core_tpg_get_initiator_node_acl(tpg, initiatorname); |
Nicholas Bellinger | 21aaa23 | 2016-01-07 22:09:27 -0800 | [diff] [blame] | 89 | if (acl) { |
| 90 | if (!kref_get_unless_zero(&acl->acl_kref)) |
| 91 | acl = NULL; |
| 92 | } |
Nicholas Bellinger | 403edd7 | 2015-03-08 22:33:47 +0000 | [diff] [blame] | 93 | mutex_unlock(&tpg->acl_node_mutex); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 94 | |
Nicholas Bellinger | fcf2948 | 2013-02-18 18:00:33 -0800 | [diff] [blame] | 95 | return acl; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 96 | } |
Thomas Glanzmann | b3fde03 | 2013-10-07 23:13:02 +0200 | [diff] [blame] | 97 | EXPORT_SYMBOL(core_tpg_get_initiator_node_acl); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 98 | |
Hannes Reinecke | e986a35 | 2015-06-18 11:43:38 +0200 | [diff] [blame] | 99 | void core_allocate_nexus_loss_ua( |
| 100 | struct se_node_acl *nacl) |
| 101 | { |
| 102 | struct se_dev_entry *deve; |
| 103 | |
| 104 | if (!nacl) |
| 105 | return; |
| 106 | |
| 107 | rcu_read_lock(); |
| 108 | hlist_for_each_entry_rcu(deve, &nacl->lun_entry_hlist, link) |
| 109 | core_scsi3_ua_allocate(deve, 0x29, |
| 110 | ASCQ_29H_NEXUS_LOSS_OCCURRED); |
| 111 | rcu_read_unlock(); |
| 112 | } |
| 113 | EXPORT_SYMBOL(core_allocate_nexus_loss_ua); |
| 114 | |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 115 | /* core_tpg_add_node_to_devs(): |
| 116 | * |
| 117 | * |
| 118 | */ |
| 119 | void core_tpg_add_node_to_devs( |
| 120 | struct se_node_acl *acl, |
Nicholas Bellinger | df9766c | 2015-05-22 02:05:19 +0000 | [diff] [blame] | 121 | struct se_portal_group *tpg, |
| 122 | struct se_lun *lun_orig) |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 123 | { |
Andy Grover | 03a68b4 | 2016-02-25 15:14:32 -0800 | [diff] [blame] | 124 | bool lun_access_ro = true; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 125 | struct se_lun *lun; |
| 126 | struct se_device *dev; |
| 127 | |
Nicholas Bellinger | 6bb8261 | 2015-05-10 19:31:10 -0700 | [diff] [blame] | 128 | mutex_lock(&tpg->tpg_lun_mutex); |
| 129 | hlist_for_each_entry_rcu(lun, &tpg->tpg_lun_hlist, link) { |
Nicholas Bellinger | df9766c | 2015-05-22 02:05:19 +0000 | [diff] [blame] | 130 | if (lun_orig && lun != lun_orig) |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 131 | continue; |
| 132 | |
Nicholas Bellinger | 4cc987e | 2015-05-19 00:03:07 -0700 | [diff] [blame] | 133 | dev = rcu_dereference_check(lun->lun_se_dev, |
| 134 | lockdep_is_held(&tpg->tpg_lun_mutex)); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 135 | /* |
| 136 | * By default in LIO-Target $FABRIC_MOD, |
| 137 | * demo_mode_write_protect is ON, or READ_ONLY; |
| 138 | */ |
Andy Grover | 6708bb2 | 2011-06-08 10:36:43 -0700 | [diff] [blame] | 139 | if (!tpg->se_tpg_tfo->tpg_check_demo_mode_write_protect(tpg)) { |
Andy Grover | 03a68b4 | 2016-02-25 15:14:32 -0800 | [diff] [blame] | 140 | lun_access_ro = false; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 141 | } else { |
| 142 | /* |
| 143 | * Allow only optical drives to issue R/W in default RO |
| 144 | * demo mode. |
| 145 | */ |
Andy Grover | e3d6f90 | 2011-07-19 08:55:10 +0000 | [diff] [blame] | 146 | if (dev->transport->get_device_type(dev) == TYPE_DISK) |
Andy Grover | 03a68b4 | 2016-02-25 15:14:32 -0800 | [diff] [blame] | 147 | lun_access_ro = true; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 148 | else |
Andy Grover | 03a68b4 | 2016-02-25 15:14:32 -0800 | [diff] [blame] | 149 | lun_access_ro = false; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 150 | } |
| 151 | |
Hannes Reinecke | f2d3068 | 2015-06-10 08:41:22 +0200 | [diff] [blame] | 152 | pr_debug("TARGET_CORE[%s]->TPG[%u]_LUN[%llu] - Adding %s" |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 153 | " access for LUN in Demo Mode\n", |
Andy Grover | e3d6f90 | 2011-07-19 08:55:10 +0000 | [diff] [blame] | 154 | tpg->se_tpg_tfo->get_fabric_name(), |
| 155 | tpg->se_tpg_tfo->tpg_get_tag(tpg), lun->unpacked_lun, |
Andy Grover | 03a68b4 | 2016-02-25 15:14:32 -0800 | [diff] [blame] | 156 | lun_access_ro ? "READ-ONLY" : "READ-WRITE"); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 157 | |
Andy Grover | e80ac6c | 2012-07-12 17:34:58 -0700 | [diff] [blame] | 158 | core_enable_device_list_for_node(lun, NULL, lun->unpacked_lun, |
Andy Grover | 03a68b4 | 2016-02-25 15:14:32 -0800 | [diff] [blame] | 159 | lun_access_ro, acl, tpg); |
Nicholas Bellinger | e248056 | 2014-10-04 04:23:15 +0000 | [diff] [blame] | 160 | /* |
| 161 | * Check to see if there are any existing persistent reservation |
| 162 | * APTPL pre-registrations that need to be enabled for this dynamic |
| 163 | * LUN ACL now.. |
| 164 | */ |
| 165 | core_scsi3_check_aptpl_registration(dev, tpg, lun, acl, |
| 166 | lun->unpacked_lun); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 167 | } |
Nicholas Bellinger | 6bb8261 | 2015-05-10 19:31:10 -0700 | [diff] [blame] | 168 | mutex_unlock(&tpg->tpg_lun_mutex); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 169 | } |
| 170 | |
Nicholas Bellinger | d36ad77 | 2016-01-07 22:15:06 -0800 | [diff] [blame] | 171 | static void |
| 172 | target_set_nacl_queue_depth(struct se_portal_group *tpg, |
| 173 | struct se_node_acl *acl, u32 queue_depth) |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 174 | { |
Nicholas Bellinger | d36ad77 | 2016-01-07 22:15:06 -0800 | [diff] [blame] | 175 | acl->queue_depth = queue_depth; |
| 176 | |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 177 | if (!acl->queue_depth) { |
Nicholas Bellinger | d36ad77 | 2016-01-07 22:15:06 -0800 | [diff] [blame] | 178 | pr_warn("Queue depth for %s Initiator Node: %s is 0," |
Andy Grover | e3d6f90 | 2011-07-19 08:55:10 +0000 | [diff] [blame] | 179 | "defaulting to 1.\n", tpg->se_tpg_tfo->get_fabric_name(), |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 180 | acl->initiatorname); |
| 181 | acl->queue_depth = 1; |
| 182 | } |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 183 | } |
| 184 | |
Christoph Hellwig | e413f47 | 2015-04-13 19:51:15 +0200 | [diff] [blame] | 185 | static struct se_node_acl *target_alloc_node_acl(struct se_portal_group *tpg, |
| 186 | const unsigned char *initiatorname) |
Jörn Engel | 4a5a75f | 2012-03-15 15:05:12 -0400 | [diff] [blame] | 187 | { |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 188 | struct se_node_acl *acl; |
Nicholas Bellinger | d36ad77 | 2016-01-07 22:15:06 -0800 | [diff] [blame] | 189 | u32 queue_depth; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 190 | |
Christoph Hellwig | 144bc4c | 2015-04-13 19:51:16 +0200 | [diff] [blame] | 191 | acl = kzalloc(max(sizeof(*acl), tpg->se_tpg_tfo->node_acl_size), |
| 192 | GFP_KERNEL); |
Andy Grover | 6708bb2 | 2011-06-08 10:36:43 -0700 | [diff] [blame] | 193 | if (!acl) |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 194 | return NULL; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 195 | |
| 196 | INIT_LIST_HEAD(&acl->acl_list); |
| 197 | INIT_LIST_HEAD(&acl->acl_sess_list); |
Nicholas Bellinger | 29a05de | 2015-03-22 20:42:19 -0700 | [diff] [blame] | 198 | INIT_HLIST_HEAD(&acl->lun_entry_hlist); |
Nicholas Bellinger | afb999f | 2012-03-08 23:45:02 -0800 | [diff] [blame] | 199 | kref_init(&acl->acl_kref); |
Nicholas Bellinger | 0146834 | 2012-03-10 14:32:52 -0800 | [diff] [blame] | 200 | init_completion(&acl->acl_free_comp); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 201 | spin_lock_init(&acl->nacl_sess_lock); |
Nicholas Bellinger | 29a05de | 2015-03-22 20:42:19 -0700 | [diff] [blame] | 202 | mutex_init(&acl->lun_entry_mutex); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 203 | atomic_set(&acl->acl_pr_ref_count, 0); |
Nicholas Bellinger | d36ad77 | 2016-01-07 22:15:06 -0800 | [diff] [blame] | 204 | |
Christoph Hellwig | e1750d2 | 2015-04-13 19:51:13 +0200 | [diff] [blame] | 205 | if (tpg->se_tpg_tfo->tpg_get_default_depth) |
Nicholas Bellinger | d36ad77 | 2016-01-07 22:15:06 -0800 | [diff] [blame] | 206 | queue_depth = tpg->se_tpg_tfo->tpg_get_default_depth(tpg); |
Christoph Hellwig | e1750d2 | 2015-04-13 19:51:13 +0200 | [diff] [blame] | 207 | else |
Nicholas Bellinger | d36ad77 | 2016-01-07 22:15:06 -0800 | [diff] [blame] | 208 | queue_depth = 1; |
| 209 | target_set_nacl_queue_depth(tpg, acl, queue_depth); |
| 210 | |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 211 | snprintf(acl->initiatorname, TRANSPORT_IQN_LEN, "%s", initiatorname); |
| 212 | acl->se_tpg = tpg; |
| 213 | acl->acl_index = scsi_get_new_index(SCSI_AUTH_INTR_INDEX); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 214 | |
Andy Grover | e3d6f90 | 2011-07-19 08:55:10 +0000 | [diff] [blame] | 215 | tpg->se_tpg_tfo->set_default_node_attributes(acl); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 216 | |
Christoph Hellwig | e413f47 | 2015-04-13 19:51:15 +0200 | [diff] [blame] | 217 | return acl; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 218 | } |
| 219 | |
Christoph Hellwig | e413f47 | 2015-04-13 19:51:15 +0200 | [diff] [blame] | 220 | static void target_add_node_acl(struct se_node_acl *acl) |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 221 | { |
Christoph Hellwig | e413f47 | 2015-04-13 19:51:15 +0200 | [diff] [blame] | 222 | struct se_portal_group *tpg = acl->se_tpg; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 223 | |
Nicholas Bellinger | 403edd7 | 2015-03-08 22:33:47 +0000 | [diff] [blame] | 224 | mutex_lock(&tpg->acl_node_mutex); |
Christoph Hellwig | e413f47 | 2015-04-13 19:51:15 +0200 | [diff] [blame] | 225 | list_add_tail(&acl->acl_list, &tpg->acl_node_list); |
Nicholas Bellinger | 403edd7 | 2015-03-08 22:33:47 +0000 | [diff] [blame] | 226 | mutex_unlock(&tpg->acl_node_mutex); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 227 | |
Christoph Hellwig | e413f47 | 2015-04-13 19:51:15 +0200 | [diff] [blame] | 228 | pr_debug("%s_TPG[%hu] - Added %s ACL with TCQ Depth: %d for %s" |
| 229 | " Initiator Node: %s\n", |
| 230 | tpg->se_tpg_tfo->get_fabric_name(), |
| 231 | tpg->se_tpg_tfo->tpg_get_tag(tpg), |
| 232 | acl->dynamic_node_acl ? "DYNAMIC" : "", |
| 233 | acl->queue_depth, |
| 234 | tpg->se_tpg_tfo->get_fabric_name(), |
| 235 | acl->initiatorname); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 236 | } |
| 237 | |
Nicholas Bellinger | 21aaa23 | 2016-01-07 22:09:27 -0800 | [diff] [blame] | 238 | bool target_tpg_has_node_acl(struct se_portal_group *tpg, |
| 239 | const char *initiatorname) |
| 240 | { |
| 241 | struct se_node_acl *acl; |
| 242 | bool found = false; |
| 243 | |
| 244 | mutex_lock(&tpg->acl_node_mutex); |
| 245 | list_for_each_entry(acl, &tpg->acl_node_list, acl_list) { |
| 246 | if (!strcmp(acl->initiatorname, initiatorname)) { |
| 247 | found = true; |
| 248 | break; |
| 249 | } |
| 250 | } |
| 251 | mutex_unlock(&tpg->acl_node_mutex); |
| 252 | |
| 253 | return found; |
| 254 | } |
| 255 | EXPORT_SYMBOL(target_tpg_has_node_acl); |
| 256 | |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 257 | struct se_node_acl *core_tpg_check_initiator_node_acl( |
| 258 | struct se_portal_group *tpg, |
| 259 | unsigned char *initiatorname) |
| 260 | { |
| 261 | struct se_node_acl *acl; |
| 262 | |
| 263 | acl = core_tpg_get_initiator_node_acl(tpg, initiatorname); |
| 264 | if (acl) |
| 265 | return acl; |
| 266 | |
| 267 | if (!tpg->se_tpg_tfo->tpg_check_demo_mode(tpg)) |
| 268 | return NULL; |
| 269 | |
Christoph Hellwig | e413f47 | 2015-04-13 19:51:15 +0200 | [diff] [blame] | 270 | acl = target_alloc_node_acl(tpg, initiatorname); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 271 | if (!acl) |
| 272 | return NULL; |
Nicholas Bellinger | 21aaa23 | 2016-01-07 22:09:27 -0800 | [diff] [blame] | 273 | /* |
| 274 | * When allocating a dynamically generated node_acl, go ahead |
| 275 | * and take the extra kref now before returning to the fabric |
| 276 | * driver caller. |
| 277 | * |
| 278 | * Note this reference will be released at session shutdown |
| 279 | * time within transport_free_session() code. |
| 280 | */ |
| 281 | kref_get(&acl->acl_kref); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 282 | acl->dynamic_node_acl = 1; |
| 283 | |
Nicholas Bellinger | 052605c | 2011-07-26 17:48:43 -0700 | [diff] [blame] | 284 | /* |
| 285 | * Here we only create demo-mode MappedLUNs from the active |
Masanari Iida | 35d1efe | 2012-08-16 22:43:13 +0900 | [diff] [blame] | 286 | * TPG LUNs if the fabric is not explicitly asking for |
Nicholas Bellinger | 052605c | 2011-07-26 17:48:43 -0700 | [diff] [blame] | 287 | * tpg_check_demo_mode_login_only() == 1. |
| 288 | */ |
Andy Grover | cdf88a2 | 2012-07-12 17:34:57 -0700 | [diff] [blame] | 289 | if ((tpg->se_tpg_tfo->tpg_check_demo_mode_login_only == NULL) || |
| 290 | (tpg->se_tpg_tfo->tpg_check_demo_mode_login_only(tpg) != 1)) |
Nicholas Bellinger | df9766c | 2015-05-22 02:05:19 +0000 | [diff] [blame] | 291 | core_tpg_add_node_to_devs(acl, tpg, NULL); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 292 | |
Christoph Hellwig | e413f47 | 2015-04-13 19:51:15 +0200 | [diff] [blame] | 293 | target_add_node_acl(acl); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 294 | return acl; |
| 295 | } |
| 296 | EXPORT_SYMBOL(core_tpg_check_initiator_node_acl); |
| 297 | |
| 298 | void core_tpg_wait_for_nacl_pr_ref(struct se_node_acl *nacl) |
| 299 | { |
| 300 | while (atomic_read(&nacl->acl_pr_ref_count) != 0) |
| 301 | cpu_relax(); |
| 302 | } |
| 303 | |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 304 | struct se_node_acl *core_tpg_add_initiator_node_acl( |
| 305 | struct se_portal_group *tpg, |
Christoph Hellwig | c7d6a80 | 2015-04-13 19:51:14 +0200 | [diff] [blame] | 306 | const char *initiatorname) |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 307 | { |
Christoph Hellwig | c7d6a80 | 2015-04-13 19:51:14 +0200 | [diff] [blame] | 308 | struct se_node_acl *acl; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 309 | |
Nicholas Bellinger | 403edd7 | 2015-03-08 22:33:47 +0000 | [diff] [blame] | 310 | mutex_lock(&tpg->acl_node_mutex); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 311 | acl = __core_tpg_get_initiator_node_acl(tpg, initiatorname); |
Andy Grover | 6708bb2 | 2011-06-08 10:36:43 -0700 | [diff] [blame] | 312 | if (acl) { |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 313 | if (acl->dynamic_node_acl) { |
| 314 | acl->dynamic_node_acl = 0; |
Andy Grover | 6708bb2 | 2011-06-08 10:36:43 -0700 | [diff] [blame] | 315 | pr_debug("%s_TPG[%u] - Replacing dynamic ACL" |
Andy Grover | e3d6f90 | 2011-07-19 08:55:10 +0000 | [diff] [blame] | 316 | " for %s\n", tpg->se_tpg_tfo->get_fabric_name(), |
| 317 | tpg->se_tpg_tfo->tpg_get_tag(tpg), initiatorname); |
Nicholas Bellinger | 403edd7 | 2015-03-08 22:33:47 +0000 | [diff] [blame] | 318 | mutex_unlock(&tpg->acl_node_mutex); |
Christoph Hellwig | e413f47 | 2015-04-13 19:51:15 +0200 | [diff] [blame] | 319 | return acl; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 320 | } |
| 321 | |
Andy Grover | 6708bb2 | 2011-06-08 10:36:43 -0700 | [diff] [blame] | 322 | pr_err("ACL entry for %s Initiator" |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 323 | " Node %s already exists for TPG %u, ignoring" |
Andy Grover | e3d6f90 | 2011-07-19 08:55:10 +0000 | [diff] [blame] | 324 | " request.\n", tpg->se_tpg_tfo->get_fabric_name(), |
| 325 | initiatorname, tpg->se_tpg_tfo->tpg_get_tag(tpg)); |
Nicholas Bellinger | 403edd7 | 2015-03-08 22:33:47 +0000 | [diff] [blame] | 326 | mutex_unlock(&tpg->acl_node_mutex); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 327 | return ERR_PTR(-EEXIST); |
| 328 | } |
Nicholas Bellinger | 403edd7 | 2015-03-08 22:33:47 +0000 | [diff] [blame] | 329 | mutex_unlock(&tpg->acl_node_mutex); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 330 | |
Christoph Hellwig | e413f47 | 2015-04-13 19:51:15 +0200 | [diff] [blame] | 331 | acl = target_alloc_node_acl(tpg, initiatorname); |
| 332 | if (!acl) |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 333 | return ERR_PTR(-ENOMEM); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 334 | |
Christoph Hellwig | e413f47 | 2015-04-13 19:51:15 +0200 | [diff] [blame] | 335 | target_add_node_acl(acl); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 336 | return acl; |
| 337 | } |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 338 | |
Christoph Hellwig | fba81f8 | 2016-05-02 15:45:20 +0200 | [diff] [blame] | 339 | static void target_shutdown_sessions(struct se_node_acl *acl) |
Christoph Hellwig | bc6e6bb | 2016-05-02 15:45:19 +0200 | [diff] [blame] | 340 | { |
| 341 | struct se_session *sess; |
| 342 | unsigned long flags; |
Christoph Hellwig | bc6e6bb | 2016-05-02 15:45:19 +0200 | [diff] [blame] | 343 | |
Christoph Hellwig | bc6e6bb | 2016-05-02 15:45:19 +0200 | [diff] [blame] | 344 | restart: |
Christoph Hellwig | fba81f8 | 2016-05-02 15:45:20 +0200 | [diff] [blame] | 345 | spin_lock_irqsave(&acl->nacl_sess_lock, flags); |
Christoph Hellwig | bc6e6bb | 2016-05-02 15:45:19 +0200 | [diff] [blame] | 346 | list_for_each_entry(sess, &acl->acl_sess_list, sess_acl_list) { |
| 347 | if (sess->sess_tearing_down) |
| 348 | continue; |
Christoph Hellwig | bc6e6bb | 2016-05-02 15:45:19 +0200 | [diff] [blame] | 349 | |
Christoph Hellwig | fba81f8 | 2016-05-02 15:45:20 +0200 | [diff] [blame] | 350 | list_del_init(&sess->sess_acl_list); |
Christoph Hellwig | bc6e6bb | 2016-05-02 15:45:19 +0200 | [diff] [blame] | 351 | spin_unlock_irqrestore(&acl->nacl_sess_lock, flags); |
Christoph Hellwig | d94331f | 2016-05-02 15:45:25 +0200 | [diff] [blame] | 352 | |
| 353 | if (acl->se_tpg->se_tpg_tfo->close_session) |
| 354 | acl->se_tpg->se_tpg_tfo->close_session(sess); |
Christoph Hellwig | bc6e6bb | 2016-05-02 15:45:19 +0200 | [diff] [blame] | 355 | goto restart; |
| 356 | } |
| 357 | spin_unlock_irqrestore(&acl->nacl_sess_lock, flags); |
| 358 | } |
| 359 | |
Christoph Hellwig | c7d6a80 | 2015-04-13 19:51:14 +0200 | [diff] [blame] | 360 | void core_tpg_del_initiator_node_acl(struct se_node_acl *acl) |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 361 | { |
Christoph Hellwig | c7d6a80 | 2015-04-13 19:51:14 +0200 | [diff] [blame] | 362 | struct se_portal_group *tpg = acl->se_tpg; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 363 | |
Nicholas Bellinger | 403edd7 | 2015-03-08 22:33:47 +0000 | [diff] [blame] | 364 | mutex_lock(&tpg->acl_node_mutex); |
Christoph Hellwig | bc6e6bb | 2016-05-02 15:45:19 +0200 | [diff] [blame] | 365 | if (acl->dynamic_node_acl) |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 366 | acl->dynamic_node_acl = 0; |
Nicholas Bellinger | 1da30c2 | 2017-08-06 16:10:03 -0700 | [diff] [blame] | 367 | list_del_init(&acl->acl_list); |
Nicholas Bellinger | 403edd7 | 2015-03-08 22:33:47 +0000 | [diff] [blame] | 368 | mutex_unlock(&tpg->acl_node_mutex); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 369 | |
Christoph Hellwig | fba81f8 | 2016-05-02 15:45:20 +0200 | [diff] [blame] | 370 | target_shutdown_sessions(acl); |
Nicholas Bellinger | 337c060 | 2012-03-10 14:36:21 -0800 | [diff] [blame] | 371 | |
Nicholas Bellinger | 337c060 | 2012-03-10 14:36:21 -0800 | [diff] [blame] | 372 | target_put_nacl(acl); |
| 373 | /* |
| 374 | * Wait for last target_put_nacl() to complete in target_complete_nacl() |
| 375 | * for active fabric session transport_deregister_session() callbacks. |
| 376 | */ |
| 377 | wait_for_completion(&acl->acl_free_comp); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 378 | |
| 379 | core_tpg_wait_for_nacl_pr_ref(acl); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 380 | core_free_device_list_for_node(acl, tpg); |
| 381 | |
Andy Grover | 6708bb2 | 2011-06-08 10:36:43 -0700 | [diff] [blame] | 382 | pr_debug("%s_TPG[%hu] - Deleted ACL with TCQ Depth: %d for %s" |
Andy Grover | e3d6f90 | 2011-07-19 08:55:10 +0000 | [diff] [blame] | 383 | " Initiator Node: %s\n", tpg->se_tpg_tfo->get_fabric_name(), |
| 384 | tpg->se_tpg_tfo->tpg_get_tag(tpg), acl->queue_depth, |
| 385 | tpg->se_tpg_tfo->get_fabric_name(), acl->initiatorname); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 386 | |
Christoph Hellwig | 144bc4c | 2015-04-13 19:51:16 +0200 | [diff] [blame] | 387 | kfree(acl); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 388 | } |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 389 | |
| 390 | /* core_tpg_set_initiator_node_queue_depth(): |
| 391 | * |
| 392 | * |
| 393 | */ |
| 394 | int core_tpg_set_initiator_node_queue_depth( |
Nicholas Bellinger | d36ad77 | 2016-01-07 22:15:06 -0800 | [diff] [blame] | 395 | struct se_node_acl *acl, |
| 396 | u32 queue_depth) |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 397 | { |
Nicholas Bellinger | d36ad77 | 2016-01-07 22:15:06 -0800 | [diff] [blame] | 398 | struct se_portal_group *tpg = acl->se_tpg; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 399 | |
| 400 | /* |
| 401 | * User has requested to change the queue depth for a Initiator Node. |
| 402 | * Change the value in the Node's struct se_node_acl, and call |
Nicholas Bellinger | d36ad77 | 2016-01-07 22:15:06 -0800 | [diff] [blame] | 403 | * target_set_nacl_queue_depth() to set the new queue depth. |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 404 | */ |
Nicholas Bellinger | d36ad77 | 2016-01-07 22:15:06 -0800 | [diff] [blame] | 405 | target_set_nacl_queue_depth(tpg, acl, queue_depth); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 406 | |
Christoph Hellwig | bc6e6bb | 2016-05-02 15:45:19 +0200 | [diff] [blame] | 407 | /* |
| 408 | * Shutdown all pending sessions to force session reinstatement. |
| 409 | */ |
Christoph Hellwig | fba81f8 | 2016-05-02 15:45:20 +0200 | [diff] [blame] | 410 | target_shutdown_sessions(acl); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 411 | |
Joe Perches | bfb9035 | 2011-08-17 06:58:04 -0700 | [diff] [blame] | 412 | pr_debug("Successfully changed queue depth to: %d for Initiator" |
Nicholas Bellinger | d36ad77 | 2016-01-07 22:15:06 -0800 | [diff] [blame] | 413 | " Node: %s on %s Target Portal Group: %u\n", acl->queue_depth, |
| 414 | acl->initiatorname, tpg->se_tpg_tfo->get_fabric_name(), |
Andy Grover | e3d6f90 | 2011-07-19 08:55:10 +0000 | [diff] [blame] | 415 | tpg->se_tpg_tfo->tpg_get_tag(tpg)); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 416 | |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 417 | return 0; |
| 418 | } |
| 419 | EXPORT_SYMBOL(core_tpg_set_initiator_node_queue_depth); |
| 420 | |
Andy Grover | 79e62fc | 2012-12-11 16:30:53 -0800 | [diff] [blame] | 421 | /* core_tpg_set_initiator_node_tag(): |
| 422 | * |
| 423 | * Initiator nodeacl tags are not used internally, but may be used by |
| 424 | * userspace to emulate aliases or groups. |
| 425 | * Returns length of newly-set tag or -EINVAL. |
| 426 | */ |
| 427 | int core_tpg_set_initiator_node_tag( |
| 428 | struct se_portal_group *tpg, |
| 429 | struct se_node_acl *acl, |
| 430 | const char *new_tag) |
| 431 | { |
| 432 | if (strlen(new_tag) >= MAX_ACL_TAG_SIZE) |
| 433 | return -EINVAL; |
| 434 | |
| 435 | if (!strncmp("NULL", new_tag, 4)) { |
| 436 | acl->acl_tag[0] = '\0'; |
| 437 | return 0; |
| 438 | } |
| 439 | |
| 440 | return snprintf(acl->acl_tag, MAX_ACL_TAG_SIZE, "%s", new_tag); |
| 441 | } |
| 442 | EXPORT_SYMBOL(core_tpg_set_initiator_node_tag); |
| 443 | |
Nicholas Bellinger | 5277797 | 2013-11-06 21:03:43 -0800 | [diff] [blame] | 444 | static void core_tpg_lun_ref_release(struct percpu_ref *ref) |
| 445 | { |
| 446 | struct se_lun *lun = container_of(ref, struct se_lun, lun_ref); |
| 447 | |
Nicholas Bellinger | 17ea11d | 2017-02-22 22:06:32 -0800 | [diff] [blame] | 448 | complete(&lun->lun_shutdown_comp); |
Nicholas Bellinger | 5277797 | 2013-11-06 21:03:43 -0800 | [diff] [blame] | 449 | } |
| 450 | |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 451 | int core_tpg_register( |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 452 | struct se_wwn *se_wwn, |
| 453 | struct se_portal_group *se_tpg, |
Christoph Hellwig | e4aae5a | 2015-05-01 17:47:56 +0200 | [diff] [blame] | 454 | int proto_id) |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 455 | { |
Christoph Hellwig | adf653f | 2015-05-25 21:33:08 -0700 | [diff] [blame] | 456 | int ret; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 457 | |
Nicholas Bellinger | bc0c94b | 2015-05-20 21:48:03 -0700 | [diff] [blame] | 458 | if (!se_tpg) |
| 459 | return -EINVAL; |
| 460 | /* |
| 461 | * For the typical case where core_tpg_register() is called by a |
| 462 | * fabric driver from target_core_fabric_ops->fabric_make_tpg() |
| 463 | * configfs context, use the original tf_ops pointer already saved |
| 464 | * by target-core in target_fabric_make_wwn(). |
| 465 | * |
| 466 | * Otherwise, for special cases like iscsi-target discovery TPGs |
| 467 | * the caller is responsible for setting ->se_tpg_tfo ahead of |
| 468 | * calling core_tpg_register(). |
| 469 | */ |
| 470 | if (se_wwn) |
| 471 | se_tpg->se_tpg_tfo = se_wwn->wwn_tf->tf_ops; |
| 472 | |
| 473 | if (!se_tpg->se_tpg_tfo) { |
| 474 | pr_err("Unable to locate se_tpg->se_tpg_tfo pointer\n"); |
| 475 | return -EINVAL; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 476 | } |
| 477 | |
Nicholas Bellinger | 6bb8261 | 2015-05-10 19:31:10 -0700 | [diff] [blame] | 478 | INIT_HLIST_HEAD(&se_tpg->tpg_lun_hlist); |
Christoph Hellwig | e4aae5a | 2015-05-01 17:47:56 +0200 | [diff] [blame] | 479 | se_tpg->proto_id = proto_id; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 480 | se_tpg->se_tpg_wwn = se_wwn; |
| 481 | atomic_set(&se_tpg->tpg_pr_ref_count, 0); |
| 482 | INIT_LIST_HEAD(&se_tpg->acl_node_list); |
Andy Grover | e3d6f90 | 2011-07-19 08:55:10 +0000 | [diff] [blame] | 483 | INIT_LIST_HEAD(&se_tpg->se_tpg_node); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 484 | INIT_LIST_HEAD(&se_tpg->tpg_sess_list); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 485 | spin_lock_init(&se_tpg->session_lock); |
Nicholas Bellinger | 6bb8261 | 2015-05-10 19:31:10 -0700 | [diff] [blame] | 486 | mutex_init(&se_tpg->tpg_lun_mutex); |
Nicholas Bellinger | 403edd7 | 2015-03-08 22:33:47 +0000 | [diff] [blame] | 487 | mutex_init(&se_tpg->acl_node_mutex); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 488 | |
Christoph Hellwig | e4aae5a | 2015-05-01 17:47:56 +0200 | [diff] [blame] | 489 | if (se_tpg->proto_id >= 0) { |
Christoph Hellwig | adf653f | 2015-05-25 21:33:08 -0700 | [diff] [blame] | 490 | se_tpg->tpg_virt_lun0 = core_tpg_alloc_lun(se_tpg, 0); |
| 491 | if (IS_ERR(se_tpg->tpg_virt_lun0)) |
| 492 | return PTR_ERR(se_tpg->tpg_virt_lun0); |
| 493 | |
| 494 | ret = core_tpg_add_lun(se_tpg, se_tpg->tpg_virt_lun0, |
Andy Grover | 03a68b4 | 2016-02-25 15:14:32 -0800 | [diff] [blame] | 495 | true, g_lun0_dev); |
Christoph Hellwig | adf653f | 2015-05-25 21:33:08 -0700 | [diff] [blame] | 496 | if (ret < 0) { |
| 497 | kfree(se_tpg->tpg_virt_lun0); |
| 498 | return ret; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 499 | } |
| 500 | } |
| 501 | |
Andy Grover | e3d6f90 | 2011-07-19 08:55:10 +0000 | [diff] [blame] | 502 | spin_lock_bh(&tpg_lock); |
| 503 | list_add_tail(&se_tpg->se_tpg_node, &tpg_list); |
| 504 | spin_unlock_bh(&tpg_lock); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 505 | |
Christoph Hellwig | e4aae5a | 2015-05-01 17:47:56 +0200 | [diff] [blame] | 506 | pr_debug("TARGET_CORE[%s]: Allocated portal_group for endpoint: %s, " |
Nicholas Bellinger | bc0c94b | 2015-05-20 21:48:03 -0700 | [diff] [blame] | 507 | "Proto: %d, Portal Tag: %u\n", se_tpg->se_tpg_tfo->get_fabric_name(), |
| 508 | se_tpg->se_tpg_tfo->tpg_get_wwn(se_tpg) ? |
| 509 | se_tpg->se_tpg_tfo->tpg_get_wwn(se_tpg) : NULL, |
| 510 | se_tpg->proto_id, se_tpg->se_tpg_tfo->tpg_get_tag(se_tpg)); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 511 | |
| 512 | return 0; |
| 513 | } |
| 514 | EXPORT_SYMBOL(core_tpg_register); |
| 515 | |
| 516 | int core_tpg_deregister(struct se_portal_group *se_tpg) |
| 517 | { |
Christoph Hellwig | e4aae5a | 2015-05-01 17:47:56 +0200 | [diff] [blame] | 518 | const struct target_core_fabric_ops *tfo = se_tpg->se_tpg_tfo; |
Nicholas Bellinger | e89d15e | 2011-02-09 15:35:03 -0800 | [diff] [blame] | 519 | struct se_node_acl *nacl, *nacl_tmp; |
Nicholas Bellinger | 22793de | 2015-03-06 10:23:25 +0000 | [diff] [blame] | 520 | LIST_HEAD(node_list); |
Nicholas Bellinger | e89d15e | 2011-02-09 15:35:03 -0800 | [diff] [blame] | 521 | |
Christoph Hellwig | e4aae5a | 2015-05-01 17:47:56 +0200 | [diff] [blame] | 522 | pr_debug("TARGET_CORE[%s]: Deallocating portal_group for endpoint: %s, " |
| 523 | "Proto: %d, Portal Tag: %u\n", tfo->get_fabric_name(), |
| 524 | tfo->tpg_get_wwn(se_tpg) ? tfo->tpg_get_wwn(se_tpg) : NULL, |
| 525 | se_tpg->proto_id, tfo->tpg_get_tag(se_tpg)); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 526 | |
Andy Grover | e3d6f90 | 2011-07-19 08:55:10 +0000 | [diff] [blame] | 527 | spin_lock_bh(&tpg_lock); |
| 528 | list_del(&se_tpg->se_tpg_node); |
| 529 | spin_unlock_bh(&tpg_lock); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 530 | |
| 531 | while (atomic_read(&se_tpg->tpg_pr_ref_count) != 0) |
| 532 | cpu_relax(); |
Nicholas Bellinger | 403edd7 | 2015-03-08 22:33:47 +0000 | [diff] [blame] | 533 | |
Nicholas Bellinger | 22793de | 2015-03-06 10:23:25 +0000 | [diff] [blame] | 534 | mutex_lock(&se_tpg->acl_node_mutex); |
| 535 | list_splice_init(&se_tpg->acl_node_list, &node_list); |
| 536 | mutex_unlock(&se_tpg->acl_node_mutex); |
Nicholas Bellinger | e89d15e | 2011-02-09 15:35:03 -0800 | [diff] [blame] | 537 | /* |
| 538 | * Release any remaining demo-mode generated se_node_acl that have |
| 539 | * not been released because of TFO->tpg_check_demo_mode_cache() == 1 |
| 540 | * in transport_deregister_session(). |
| 541 | */ |
Nicholas Bellinger | 22793de | 2015-03-06 10:23:25 +0000 | [diff] [blame] | 542 | list_for_each_entry_safe(nacl, nacl_tmp, &node_list, acl_list) { |
Nicholas Bellinger | 1da30c2 | 2017-08-06 16:10:03 -0700 | [diff] [blame] | 543 | list_del_init(&nacl->acl_list); |
Nicholas Bellinger | e89d15e | 2011-02-09 15:35:03 -0800 | [diff] [blame] | 544 | |
| 545 | core_tpg_wait_for_nacl_pr_ref(nacl); |
| 546 | core_free_device_list_for_node(nacl, se_tpg); |
Christoph Hellwig | 144bc4c | 2015-04-13 19:51:16 +0200 | [diff] [blame] | 547 | kfree(nacl); |
Nicholas Bellinger | e89d15e | 2011-02-09 15:35:03 -0800 | [diff] [blame] | 548 | } |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 549 | |
Christoph Hellwig | adf653f | 2015-05-25 21:33:08 -0700 | [diff] [blame] | 550 | if (se_tpg->proto_id >= 0) { |
| 551 | core_tpg_remove_lun(se_tpg, se_tpg->tpg_virt_lun0); |
| 552 | kfree_rcu(se_tpg->tpg_virt_lun0, rcu_head); |
| 553 | } |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 554 | |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 555 | return 0; |
| 556 | } |
| 557 | EXPORT_SYMBOL(core_tpg_deregister); |
| 558 | |
Andy Grover | d344f8a | 2013-11-26 12:07:54 -0800 | [diff] [blame] | 559 | struct se_lun *core_tpg_alloc_lun( |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 560 | struct se_portal_group *tpg, |
Hannes Reinecke | f2d3068 | 2015-06-10 08:41:22 +0200 | [diff] [blame] | 561 | u64 unpacked_lun) |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 562 | { |
| 563 | struct se_lun *lun; |
| 564 | |
Nicholas Bellinger | 6bb8261 | 2015-05-10 19:31:10 -0700 | [diff] [blame] | 565 | lun = kzalloc(sizeof(*lun), GFP_KERNEL); |
| 566 | if (!lun) { |
| 567 | pr_err("Unable to allocate se_lun memory\n"); |
| 568 | return ERR_PTR(-ENOMEM); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 569 | } |
Nicholas Bellinger | 6bb8261 | 2015-05-10 19:31:10 -0700 | [diff] [blame] | 570 | lun->unpacked_lun = unpacked_lun; |
| 571 | lun->lun_link_magic = SE_LUN_LINK_MAGIC; |
Nicholas Bellinger | 6bb8261 | 2015-05-10 19:31:10 -0700 | [diff] [blame] | 572 | atomic_set(&lun->lun_acl_count, 0); |
Nicholas Bellinger | 6bb8261 | 2015-05-10 19:31:10 -0700 | [diff] [blame] | 573 | init_completion(&lun->lun_ref_comp); |
Nicholas Bellinger | 17ea11d | 2017-02-22 22:06:32 -0800 | [diff] [blame] | 574 | init_completion(&lun->lun_shutdown_comp); |
Christoph Hellwig | adf653f | 2015-05-25 21:33:08 -0700 | [diff] [blame] | 575 | INIT_LIST_HEAD(&lun->lun_deve_list); |
| 576 | INIT_LIST_HEAD(&lun->lun_dev_link); |
| 577 | atomic_set(&lun->lun_tg_pt_secondary_offline, 0); |
| 578 | spin_lock_init(&lun->lun_deve_lock); |
| 579 | mutex_init(&lun->lun_tg_pt_md_mutex); |
| 580 | INIT_LIST_HEAD(&lun->lun_tg_pt_gp_link); |
| 581 | spin_lock_init(&lun->lun_tg_pt_gp_lock); |
Christoph Hellwig | adf653f | 2015-05-25 21:33:08 -0700 | [diff] [blame] | 582 | lun->lun_tpg = tpg; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 583 | |
| 584 | return lun; |
| 585 | } |
| 586 | |
Andy Grover | d344f8a | 2013-11-26 12:07:54 -0800 | [diff] [blame] | 587 | int core_tpg_add_lun( |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 588 | struct se_portal_group *tpg, |
| 589 | struct se_lun *lun, |
Andy Grover | 03a68b4 | 2016-02-25 15:14:32 -0800 | [diff] [blame] | 590 | bool lun_access_ro, |
Andy Grover | 340dbf7 | 2013-12-12 16:12:33 -0800 | [diff] [blame] | 591 | struct se_device *dev) |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 592 | { |
Andy Grover | e3d6f90 | 2011-07-19 08:55:10 +0000 | [diff] [blame] | 593 | int ret; |
| 594 | |
Tejun Heo | 2aad2a8 | 2014-09-24 13:31:50 -0400 | [diff] [blame] | 595 | ret = percpu_ref_init(&lun->lun_ref, core_tpg_lun_ref_release, 0, |
Tejun Heo | a34375e | 2014-09-08 09:51:30 +0900 | [diff] [blame] | 596 | GFP_KERNEL); |
Andy Grover | e3d6f90 | 2011-07-19 08:55:10 +0000 | [diff] [blame] | 597 | if (ret < 0) |
Christoph Hellwig | adf653f | 2015-05-25 21:33:08 -0700 | [diff] [blame] | 598 | goto out; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 599 | |
Christoph Hellwig | adf653f | 2015-05-25 21:33:08 -0700 | [diff] [blame] | 600 | ret = core_alloc_rtpi(lun, dev); |
| 601 | if (ret) |
| 602 | goto out_kill_ref; |
Nicholas Bellinger | 5277797 | 2013-11-06 21:03:43 -0800 | [diff] [blame] | 603 | |
Christoph Hellwig | adf653f | 2015-05-25 21:33:08 -0700 | [diff] [blame] | 604 | if (!(dev->transport->transport_flags & TRANSPORT_FLAG_PASSTHROUGH) && |
| 605 | !(dev->se_hba->hba_flags & HBA_FLAGS_INTERNAL_USE)) |
| 606 | target_attach_tg_pt_gp(lun, dev->t10_alua.default_tg_pt_gp); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 607 | |
Nicholas Bellinger | 6bb8261 | 2015-05-10 19:31:10 -0700 | [diff] [blame] | 608 | mutex_lock(&tpg->tpg_lun_mutex); |
Christoph Hellwig | adf653f | 2015-05-25 21:33:08 -0700 | [diff] [blame] | 609 | |
Christoph Hellwig | adf653f | 2015-05-25 21:33:08 -0700 | [diff] [blame] | 610 | spin_lock(&dev->se_port_lock); |
Nicholas Bellinger | 4cc987e | 2015-05-19 00:03:07 -0700 | [diff] [blame] | 611 | lun->lun_index = dev->dev_index; |
Christoph Hellwig | adf653f | 2015-05-25 21:33:08 -0700 | [diff] [blame] | 612 | rcu_assign_pointer(lun->lun_se_dev, dev); |
| 613 | dev->export_count++; |
| 614 | list_add_tail(&lun->lun_dev_link, &dev->dev_sep_list); |
| 615 | spin_unlock(&dev->se_port_lock); |
| 616 | |
Nicholas Bellinger | eeeb952 | 2015-09-15 17:27:35 -0700 | [diff] [blame] | 617 | if (dev->dev_flags & DF_READ_ONLY) |
Andy Grover | 03a68b4 | 2016-02-25 15:14:32 -0800 | [diff] [blame] | 618 | lun->lun_access_ro = true; |
Nicholas Bellinger | eeeb952 | 2015-09-15 17:27:35 -0700 | [diff] [blame] | 619 | else |
Andy Grover | 03a68b4 | 2016-02-25 15:14:32 -0800 | [diff] [blame] | 620 | lun->lun_access_ro = lun_access_ro; |
Nicholas Bellinger | 6bb8261 | 2015-05-10 19:31:10 -0700 | [diff] [blame] | 621 | if (!(dev->se_hba->hba_flags & HBA_FLAGS_INTERNAL_USE)) |
| 622 | hlist_add_head_rcu(&lun->link, &tpg->tpg_lun_hlist); |
| 623 | mutex_unlock(&tpg->tpg_lun_mutex); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 624 | |
| 625 | return 0; |
Christoph Hellwig | adf653f | 2015-05-25 21:33:08 -0700 | [diff] [blame] | 626 | |
| 627 | out_kill_ref: |
| 628 | percpu_ref_exit(&lun->lun_ref); |
| 629 | out: |
| 630 | return ret; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 631 | } |
| 632 | |
Andy Grover | cd9d7cb | 2014-06-30 16:39:44 -0700 | [diff] [blame] | 633 | void core_tpg_remove_lun( |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 634 | struct se_portal_group *tpg, |
| 635 | struct se_lun *lun) |
| 636 | { |
Nicholas Bellinger | 4cc987e | 2015-05-19 00:03:07 -0700 | [diff] [blame] | 637 | /* |
| 638 | * rcu_dereference_raw protected by se_lun->lun_group symlink |
| 639 | * reference to se_device->dev_group. |
| 640 | */ |
| 641 | struct se_device *dev = rcu_dereference_raw(lun->lun_se_dev); |
Nicholas Bellinger | 6bb8261 | 2015-05-10 19:31:10 -0700 | [diff] [blame] | 642 | |
Nicholas Bellinger | 92f8aa7 | 2017-03-27 16:12:43 -0700 | [diff] [blame] | 643 | lun->lun_shutdown = true; |
| 644 | |
Nicholas Bellinger | 4a9a6c8 | 2013-11-06 21:05:19 -0800 | [diff] [blame] | 645 | core_clear_lun_from_tpg(lun, tpg); |
Nicholas Bellinger | 9e37d04 | 2015-05-20 21:21:08 -0700 | [diff] [blame] | 646 | /* |
| 647 | * Wait for any active I/O references to percpu se_lun->lun_ref to |
| 648 | * be released. Also, se_lun->lun_ref is now used by PR and ALUA |
| 649 | * logic when referencing a remote target port during ALL_TGT_PT=1 |
| 650 | * and generating UNIT_ATTENTIONs for ALUA access state transition. |
| 651 | */ |
Nicholas Bellinger | 4a9a6c8 | 2013-11-06 21:05:19 -0800 | [diff] [blame] | 652 | transport_clear_lun_ref(lun); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 653 | |
Nicholas Bellinger | 6bb8261 | 2015-05-10 19:31:10 -0700 | [diff] [blame] | 654 | mutex_lock(&tpg->tpg_lun_mutex); |
Christoph Hellwig | adf653f | 2015-05-25 21:33:08 -0700 | [diff] [blame] | 655 | if (lun->lun_se_dev) { |
Christoph Hellwig | adf653f | 2015-05-25 21:33:08 -0700 | [diff] [blame] | 656 | target_detach_tg_pt_gp(lun); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 657 | |
Christoph Hellwig | adf653f | 2015-05-25 21:33:08 -0700 | [diff] [blame] | 658 | spin_lock(&dev->se_port_lock); |
| 659 | list_del(&lun->lun_dev_link); |
| 660 | dev->export_count--; |
| 661 | rcu_assign_pointer(lun->lun_se_dev, NULL); |
| 662 | spin_unlock(&dev->se_port_lock); |
| 663 | } |
Nicholas Bellinger | 6bb8261 | 2015-05-10 19:31:10 -0700 | [diff] [blame] | 664 | if (!(dev->se_hba->hba_flags & HBA_FLAGS_INTERNAL_USE)) |
| 665 | hlist_del_rcu(&lun->link); |
Nicholas Bellinger | 92f8aa7 | 2017-03-27 16:12:43 -0700 | [diff] [blame] | 666 | |
| 667 | lun->lun_shutdown = false; |
Nicholas Bellinger | 6bb8261 | 2015-05-10 19:31:10 -0700 | [diff] [blame] | 668 | mutex_unlock(&tpg->tpg_lun_mutex); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 669 | |
Tejun Heo | 9a1049d | 2014-06-28 08:10:14 -0400 | [diff] [blame] | 670 | percpu_ref_exit(&lun->lun_ref); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 671 | } |