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 | * |
| 6 | * Copyright (c) 2002, 2003, 2004, 2005 PyX Technologies, Inc. |
| 7 | * Copyright (c) 2005, 2006, 2007 SBE, Inc. |
| 8 | * Copyright (c) 2007-2010 Rising Tide Systems |
| 9 | * Copyright (c) 2008-2010 Linux-iSCSI.org |
| 10 | * |
| 11 | * Nicholas A. Bellinger <nab@kernel.org> |
| 12 | * |
| 13 | * This program is free software; you can redistribute it and/or modify |
| 14 | * it under the terms of the GNU General Public License as published by |
| 15 | * the Free Software Foundation; either version 2 of the License, or |
| 16 | * (at your option) any later version. |
| 17 | * |
| 18 | * This program is distributed in the hope that it will be useful, |
| 19 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 20 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 21 | * GNU General Public License for more details. |
| 22 | * |
| 23 | * You should have received a copy of the GNU General Public License |
| 24 | * along with this program; if not, write to the Free Software |
| 25 | * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. |
| 26 | * |
| 27 | ******************************************************************************/ |
| 28 | |
| 29 | #include <linux/net.h> |
| 30 | #include <linux/string.h> |
| 31 | #include <linux/timer.h> |
| 32 | #include <linux/slab.h> |
| 33 | #include <linux/spinlock.h> |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 34 | #include <linux/in.h> |
| 35 | #include <net/sock.h> |
| 36 | #include <net/tcp.h> |
| 37 | #include <scsi/scsi.h> |
| 38 | #include <scsi/scsi_cmnd.h> |
| 39 | |
| 40 | #include <target/target_core_base.h> |
| 41 | #include <target/target_core_device.h> |
| 42 | #include <target/target_core_tpg.h> |
| 43 | #include <target/target_core_transport.h> |
| 44 | #include <target/target_core_fabric_ops.h> |
| 45 | |
| 46 | #include "target_core_hba.h" |
Andy Grover | e3d6f90 | 2011-07-19 08:55:10 +0000 | [diff] [blame] | 47 | #include "target_core_stat.h" |
| 48 | |
| 49 | extern struct se_device *g_lun0_dev; |
| 50 | |
| 51 | static DEFINE_SPINLOCK(tpg_lock); |
| 52 | static LIST_HEAD(tpg_list); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 53 | |
| 54 | /* core_clear_initiator_node_from_tpg(): |
| 55 | * |
| 56 | * |
| 57 | */ |
| 58 | static void core_clear_initiator_node_from_tpg( |
| 59 | struct se_node_acl *nacl, |
| 60 | struct se_portal_group *tpg) |
| 61 | { |
| 62 | int i; |
| 63 | struct se_dev_entry *deve; |
| 64 | struct se_lun *lun; |
| 65 | struct se_lun_acl *acl, *acl_tmp; |
| 66 | |
| 67 | spin_lock_irq(&nacl->device_list_lock); |
| 68 | for (i = 0; i < TRANSPORT_MAX_LUNS_PER_TPG; i++) { |
| 69 | deve = &nacl->device_list[i]; |
| 70 | |
| 71 | if (!(deve->lun_flags & TRANSPORT_LUNFLAGS_INITIATOR_ACCESS)) |
| 72 | continue; |
| 73 | |
| 74 | if (!deve->se_lun) { |
Andy Grover | 6708bb2 | 2011-06-08 10:36:43 -0700 | [diff] [blame] | 75 | pr_err("%s device entries device pointer is" |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 76 | " NULL, but Initiator has access.\n", |
Andy Grover | e3d6f90 | 2011-07-19 08:55:10 +0000 | [diff] [blame] | 77 | tpg->se_tpg_tfo->get_fabric_name()); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 78 | continue; |
| 79 | } |
| 80 | |
| 81 | lun = deve->se_lun; |
| 82 | spin_unlock_irq(&nacl->device_list_lock); |
| 83 | core_update_device_list_for_node(lun, NULL, deve->mapped_lun, |
| 84 | TRANSPORT_LUNFLAGS_NO_ACCESS, nacl, tpg, 0); |
| 85 | |
| 86 | spin_lock(&lun->lun_acl_lock); |
| 87 | list_for_each_entry_safe(acl, acl_tmp, |
| 88 | &lun->lun_acl_list, lacl_list) { |
Andy Grover | 6708bb2 | 2011-06-08 10:36:43 -0700 | [diff] [blame] | 89 | if (!strcmp(acl->initiatorname, nacl->initiatorname) && |
| 90 | (acl->mapped_lun == deve->mapped_lun)) |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 91 | break; |
| 92 | } |
| 93 | |
| 94 | if (!acl) { |
Andy Grover | 6708bb2 | 2011-06-08 10:36:43 -0700 | [diff] [blame] | 95 | pr_err("Unable to locate struct se_lun_acl for %s," |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 96 | " mapped_lun: %u\n", nacl->initiatorname, |
| 97 | deve->mapped_lun); |
| 98 | spin_unlock(&lun->lun_acl_lock); |
| 99 | spin_lock_irq(&nacl->device_list_lock); |
| 100 | continue; |
| 101 | } |
| 102 | |
| 103 | list_del(&acl->lacl_list); |
| 104 | spin_unlock(&lun->lun_acl_lock); |
| 105 | |
| 106 | spin_lock_irq(&nacl->device_list_lock); |
| 107 | kfree(acl); |
| 108 | } |
| 109 | spin_unlock_irq(&nacl->device_list_lock); |
| 110 | } |
| 111 | |
| 112 | /* __core_tpg_get_initiator_node_acl(): |
| 113 | * |
| 114 | * spin_lock_bh(&tpg->acl_node_lock); must be held when calling |
| 115 | */ |
| 116 | struct se_node_acl *__core_tpg_get_initiator_node_acl( |
| 117 | struct se_portal_group *tpg, |
| 118 | const char *initiatorname) |
| 119 | { |
| 120 | struct se_node_acl *acl; |
| 121 | |
| 122 | list_for_each_entry(acl, &tpg->acl_node_list, acl_list) { |
Andy Grover | 6708bb2 | 2011-06-08 10:36:43 -0700 | [diff] [blame] | 123 | if (!strcmp(acl->initiatorname, initiatorname)) |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 124 | return acl; |
| 125 | } |
| 126 | |
| 127 | return NULL; |
| 128 | } |
| 129 | |
| 130 | /* core_tpg_get_initiator_node_acl(): |
| 131 | * |
| 132 | * |
| 133 | */ |
| 134 | struct se_node_acl *core_tpg_get_initiator_node_acl( |
| 135 | struct se_portal_group *tpg, |
| 136 | unsigned char *initiatorname) |
| 137 | { |
| 138 | struct se_node_acl *acl; |
| 139 | |
| 140 | spin_lock_bh(&tpg->acl_node_lock); |
| 141 | list_for_each_entry(acl, &tpg->acl_node_list, acl_list) { |
Andy Grover | 6708bb2 | 2011-06-08 10:36:43 -0700 | [diff] [blame] | 142 | if (!strcmp(acl->initiatorname, initiatorname) && |
| 143 | !acl->dynamic_node_acl) { |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 144 | spin_unlock_bh(&tpg->acl_node_lock); |
| 145 | return acl; |
| 146 | } |
| 147 | } |
| 148 | spin_unlock_bh(&tpg->acl_node_lock); |
| 149 | |
| 150 | return NULL; |
| 151 | } |
| 152 | |
| 153 | /* core_tpg_add_node_to_devs(): |
| 154 | * |
| 155 | * |
| 156 | */ |
| 157 | void core_tpg_add_node_to_devs( |
| 158 | struct se_node_acl *acl, |
| 159 | struct se_portal_group *tpg) |
| 160 | { |
| 161 | int i = 0; |
| 162 | u32 lun_access = 0; |
| 163 | struct se_lun *lun; |
| 164 | struct se_device *dev; |
| 165 | |
| 166 | spin_lock(&tpg->tpg_lun_lock); |
| 167 | for (i = 0; i < TRANSPORT_MAX_LUNS_PER_TPG; i++) { |
| 168 | lun = &tpg->tpg_lun_list[i]; |
| 169 | if (lun->lun_status != TRANSPORT_LUN_STATUS_ACTIVE) |
| 170 | continue; |
| 171 | |
| 172 | spin_unlock(&tpg->tpg_lun_lock); |
| 173 | |
| 174 | dev = lun->lun_se_dev; |
| 175 | /* |
| 176 | * By default in LIO-Target $FABRIC_MOD, |
| 177 | * demo_mode_write_protect is ON, or READ_ONLY; |
| 178 | */ |
Andy Grover | 6708bb2 | 2011-06-08 10:36:43 -0700 | [diff] [blame] | 179 | if (!tpg->se_tpg_tfo->tpg_check_demo_mode_write_protect(tpg)) { |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 180 | if (dev->dev_flags & DF_READ_ONLY) |
| 181 | lun_access = TRANSPORT_LUNFLAGS_READ_ONLY; |
| 182 | else |
| 183 | lun_access = TRANSPORT_LUNFLAGS_READ_WRITE; |
| 184 | } else { |
| 185 | /* |
| 186 | * Allow only optical drives to issue R/W in default RO |
| 187 | * demo mode. |
| 188 | */ |
Andy Grover | e3d6f90 | 2011-07-19 08:55:10 +0000 | [diff] [blame] | 189 | if (dev->transport->get_device_type(dev) == TYPE_DISK) |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 190 | lun_access = TRANSPORT_LUNFLAGS_READ_ONLY; |
| 191 | else |
| 192 | lun_access = TRANSPORT_LUNFLAGS_READ_WRITE; |
| 193 | } |
| 194 | |
Andy Grover | 6708bb2 | 2011-06-08 10:36:43 -0700 | [diff] [blame] | 195 | pr_debug("TARGET_CORE[%s]->TPG[%u]_LUN[%u] - Adding %s" |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 196 | " access for LUN in Demo Mode\n", |
Andy Grover | e3d6f90 | 2011-07-19 08:55:10 +0000 | [diff] [blame] | 197 | tpg->se_tpg_tfo->get_fabric_name(), |
| 198 | tpg->se_tpg_tfo->tpg_get_tag(tpg), lun->unpacked_lun, |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 199 | (lun_access == TRANSPORT_LUNFLAGS_READ_WRITE) ? |
| 200 | "READ-WRITE" : "READ-ONLY"); |
| 201 | |
| 202 | core_update_device_list_for_node(lun, NULL, lun->unpacked_lun, |
| 203 | lun_access, acl, tpg, 1); |
| 204 | spin_lock(&tpg->tpg_lun_lock); |
| 205 | } |
| 206 | spin_unlock(&tpg->tpg_lun_lock); |
| 207 | } |
| 208 | |
| 209 | /* core_set_queue_depth_for_node(): |
| 210 | * |
| 211 | * |
| 212 | */ |
| 213 | static int core_set_queue_depth_for_node( |
| 214 | struct se_portal_group *tpg, |
| 215 | struct se_node_acl *acl) |
| 216 | { |
| 217 | if (!acl->queue_depth) { |
Andy Grover | 6708bb2 | 2011-06-08 10:36:43 -0700 | [diff] [blame] | 218 | pr_err("Queue depth for %s Initiator Node: %s is 0," |
Andy Grover | e3d6f90 | 2011-07-19 08:55:10 +0000 | [diff] [blame] | 219 | "defaulting to 1.\n", tpg->se_tpg_tfo->get_fabric_name(), |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 220 | acl->initiatorname); |
| 221 | acl->queue_depth = 1; |
| 222 | } |
| 223 | |
| 224 | return 0; |
| 225 | } |
| 226 | |
| 227 | /* core_create_device_list_for_node(): |
| 228 | * |
| 229 | * |
| 230 | */ |
| 231 | static int core_create_device_list_for_node(struct se_node_acl *nacl) |
| 232 | { |
| 233 | struct se_dev_entry *deve; |
| 234 | int i; |
| 235 | |
| 236 | nacl->device_list = kzalloc(sizeof(struct se_dev_entry) * |
| 237 | TRANSPORT_MAX_LUNS_PER_TPG, GFP_KERNEL); |
Andy Grover | 6708bb2 | 2011-06-08 10:36:43 -0700 | [diff] [blame] | 238 | if (!nacl->device_list) { |
| 239 | pr_err("Unable to allocate memory for" |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 240 | " struct se_node_acl->device_list\n"); |
Andy Grover | e3d6f90 | 2011-07-19 08:55:10 +0000 | [diff] [blame] | 241 | return -ENOMEM; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 242 | } |
| 243 | for (i = 0; i < TRANSPORT_MAX_LUNS_PER_TPG; i++) { |
| 244 | deve = &nacl->device_list[i]; |
| 245 | |
| 246 | atomic_set(&deve->ua_count, 0); |
| 247 | atomic_set(&deve->pr_ref_count, 0); |
| 248 | spin_lock_init(&deve->ua_lock); |
| 249 | INIT_LIST_HEAD(&deve->alua_port_list); |
| 250 | INIT_LIST_HEAD(&deve->ua_list); |
| 251 | } |
| 252 | |
| 253 | return 0; |
| 254 | } |
| 255 | |
| 256 | /* core_tpg_check_initiator_node_acl() |
| 257 | * |
| 258 | * |
| 259 | */ |
| 260 | struct se_node_acl *core_tpg_check_initiator_node_acl( |
| 261 | struct se_portal_group *tpg, |
| 262 | unsigned char *initiatorname) |
| 263 | { |
| 264 | struct se_node_acl *acl; |
| 265 | |
| 266 | acl = core_tpg_get_initiator_node_acl(tpg, initiatorname); |
Andy Grover | 6708bb2 | 2011-06-08 10:36:43 -0700 | [diff] [blame] | 267 | if (acl) |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 268 | return acl; |
| 269 | |
Andy Grover | 6708bb2 | 2011-06-08 10:36:43 -0700 | [diff] [blame] | 270 | if (!tpg->se_tpg_tfo->tpg_check_demo_mode(tpg)) |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 271 | return NULL; |
| 272 | |
Andy Grover | e3d6f90 | 2011-07-19 08:55:10 +0000 | [diff] [blame] | 273 | acl = tpg->se_tpg_tfo->tpg_alloc_fabric_acl(tpg); |
Andy Grover | 6708bb2 | 2011-06-08 10:36:43 -0700 | [diff] [blame] | 274 | if (!acl) |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 275 | return NULL; |
| 276 | |
| 277 | INIT_LIST_HEAD(&acl->acl_list); |
| 278 | INIT_LIST_HEAD(&acl->acl_sess_list); |
| 279 | spin_lock_init(&acl->device_list_lock); |
| 280 | spin_lock_init(&acl->nacl_sess_lock); |
| 281 | atomic_set(&acl->acl_pr_ref_count, 0); |
Andy Grover | e3d6f90 | 2011-07-19 08:55:10 +0000 | [diff] [blame] | 282 | acl->queue_depth = tpg->se_tpg_tfo->tpg_get_default_depth(tpg); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 283 | snprintf(acl->initiatorname, TRANSPORT_IQN_LEN, "%s", initiatorname); |
| 284 | acl->se_tpg = tpg; |
| 285 | acl->acl_index = scsi_get_new_index(SCSI_AUTH_INTR_INDEX); |
| 286 | spin_lock_init(&acl->stats_lock); |
| 287 | acl->dynamic_node_acl = 1; |
| 288 | |
Andy Grover | e3d6f90 | 2011-07-19 08:55:10 +0000 | [diff] [blame] | 289 | tpg->se_tpg_tfo->set_default_node_attributes(acl); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 290 | |
| 291 | if (core_create_device_list_for_node(acl) < 0) { |
Andy Grover | e3d6f90 | 2011-07-19 08:55:10 +0000 | [diff] [blame] | 292 | tpg->se_tpg_tfo->tpg_release_fabric_acl(tpg, acl); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 293 | return NULL; |
| 294 | } |
| 295 | |
| 296 | if (core_set_queue_depth_for_node(tpg, acl) < 0) { |
| 297 | core_free_device_list_for_node(acl, tpg); |
Andy Grover | e3d6f90 | 2011-07-19 08:55:10 +0000 | [diff] [blame] | 298 | tpg->se_tpg_tfo->tpg_release_fabric_acl(tpg, acl); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 299 | return NULL; |
| 300 | } |
Nicholas Bellinger | 052605c | 2011-07-26 17:48:43 -0700 | [diff] [blame] | 301 | /* |
| 302 | * Here we only create demo-mode MappedLUNs from the active |
| 303 | * TPG LUNs if the fabric is not explictly asking for |
| 304 | * tpg_check_demo_mode_login_only() == 1. |
| 305 | */ |
| 306 | if ((tpg->se_tpg_tfo->tpg_check_demo_mode_login_only != NULL) && |
| 307 | (tpg->se_tpg_tfo->tpg_check_demo_mode_login_only(tpg) == 1)) |
| 308 | do { ; } while (0); |
| 309 | else |
| 310 | core_tpg_add_node_to_devs(acl, tpg); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 311 | |
| 312 | spin_lock_bh(&tpg->acl_node_lock); |
| 313 | list_add_tail(&acl->acl_list, &tpg->acl_node_list); |
| 314 | tpg->num_node_acls++; |
| 315 | spin_unlock_bh(&tpg->acl_node_lock); |
| 316 | |
Andy Grover | 6708bb2 | 2011-06-08 10:36:43 -0700 | [diff] [blame] | 317 | pr_debug("%s_TPG[%u] - Added DYNAMIC ACL with TCQ Depth: %d for %s" |
Andy Grover | e3d6f90 | 2011-07-19 08:55:10 +0000 | [diff] [blame] | 318 | " Initiator Node: %s\n", tpg->se_tpg_tfo->get_fabric_name(), |
| 319 | tpg->se_tpg_tfo->tpg_get_tag(tpg), acl->queue_depth, |
| 320 | tpg->se_tpg_tfo->get_fabric_name(), initiatorname); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 321 | |
| 322 | return acl; |
| 323 | } |
| 324 | EXPORT_SYMBOL(core_tpg_check_initiator_node_acl); |
| 325 | |
| 326 | void core_tpg_wait_for_nacl_pr_ref(struct se_node_acl *nacl) |
| 327 | { |
| 328 | while (atomic_read(&nacl->acl_pr_ref_count) != 0) |
| 329 | cpu_relax(); |
| 330 | } |
| 331 | |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 332 | void core_tpg_clear_object_luns(struct se_portal_group *tpg) |
| 333 | { |
| 334 | int i, ret; |
| 335 | struct se_lun *lun; |
| 336 | |
| 337 | spin_lock(&tpg->tpg_lun_lock); |
| 338 | for (i = 0; i < TRANSPORT_MAX_LUNS_PER_TPG; i++) { |
| 339 | lun = &tpg->tpg_lun_list[i]; |
| 340 | |
| 341 | if ((lun->lun_status != TRANSPORT_LUN_STATUS_ACTIVE) || |
| 342 | (lun->lun_se_dev == NULL)) |
| 343 | continue; |
| 344 | |
| 345 | spin_unlock(&tpg->tpg_lun_lock); |
| 346 | ret = core_dev_del_lun(tpg, lun->unpacked_lun); |
| 347 | spin_lock(&tpg->tpg_lun_lock); |
| 348 | } |
| 349 | spin_unlock(&tpg->tpg_lun_lock); |
| 350 | } |
| 351 | EXPORT_SYMBOL(core_tpg_clear_object_luns); |
| 352 | |
| 353 | /* core_tpg_add_initiator_node_acl(): |
| 354 | * |
| 355 | * |
| 356 | */ |
| 357 | struct se_node_acl *core_tpg_add_initiator_node_acl( |
| 358 | struct se_portal_group *tpg, |
| 359 | struct se_node_acl *se_nacl, |
| 360 | const char *initiatorname, |
| 361 | u32 queue_depth) |
| 362 | { |
| 363 | struct se_node_acl *acl = NULL; |
| 364 | |
| 365 | spin_lock_bh(&tpg->acl_node_lock); |
| 366 | acl = __core_tpg_get_initiator_node_acl(tpg, initiatorname); |
Andy Grover | 6708bb2 | 2011-06-08 10:36:43 -0700 | [diff] [blame] | 367 | if (acl) { |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 368 | if (acl->dynamic_node_acl) { |
| 369 | acl->dynamic_node_acl = 0; |
Andy Grover | 6708bb2 | 2011-06-08 10:36:43 -0700 | [diff] [blame] | 370 | pr_debug("%s_TPG[%u] - Replacing dynamic ACL" |
Andy Grover | e3d6f90 | 2011-07-19 08:55:10 +0000 | [diff] [blame] | 371 | " for %s\n", tpg->se_tpg_tfo->get_fabric_name(), |
| 372 | tpg->se_tpg_tfo->tpg_get_tag(tpg), initiatorname); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 373 | spin_unlock_bh(&tpg->acl_node_lock); |
| 374 | /* |
| 375 | * Release the locally allocated struct se_node_acl |
| 376 | * because * core_tpg_add_initiator_node_acl() returned |
| 377 | * a pointer to an existing demo mode node ACL. |
| 378 | */ |
| 379 | if (se_nacl) |
Andy Grover | e3d6f90 | 2011-07-19 08:55:10 +0000 | [diff] [blame] | 380 | tpg->se_tpg_tfo->tpg_release_fabric_acl(tpg, |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 381 | se_nacl); |
| 382 | goto done; |
| 383 | } |
| 384 | |
Andy Grover | 6708bb2 | 2011-06-08 10:36:43 -0700 | [diff] [blame] | 385 | pr_err("ACL entry for %s Initiator" |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 386 | " Node %s already exists for TPG %u, ignoring" |
Andy Grover | e3d6f90 | 2011-07-19 08:55:10 +0000 | [diff] [blame] | 387 | " request.\n", tpg->se_tpg_tfo->get_fabric_name(), |
| 388 | initiatorname, tpg->se_tpg_tfo->tpg_get_tag(tpg)); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 389 | spin_unlock_bh(&tpg->acl_node_lock); |
| 390 | return ERR_PTR(-EEXIST); |
| 391 | } |
| 392 | spin_unlock_bh(&tpg->acl_node_lock); |
| 393 | |
Andy Grover | 6708bb2 | 2011-06-08 10:36:43 -0700 | [diff] [blame] | 394 | if (!se_nacl) { |
| 395 | pr_err("struct se_node_acl pointer is NULL\n"); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 396 | return ERR_PTR(-EINVAL); |
| 397 | } |
| 398 | /* |
| 399 | * For v4.x logic the se_node_acl_s is hanging off a fabric |
| 400 | * dependent structure allocated via |
| 401 | * struct target_core_fabric_ops->fabric_make_nodeacl() |
| 402 | */ |
| 403 | acl = se_nacl; |
| 404 | |
| 405 | INIT_LIST_HEAD(&acl->acl_list); |
| 406 | INIT_LIST_HEAD(&acl->acl_sess_list); |
| 407 | spin_lock_init(&acl->device_list_lock); |
| 408 | spin_lock_init(&acl->nacl_sess_lock); |
| 409 | atomic_set(&acl->acl_pr_ref_count, 0); |
| 410 | acl->queue_depth = queue_depth; |
| 411 | snprintf(acl->initiatorname, TRANSPORT_IQN_LEN, "%s", initiatorname); |
| 412 | acl->se_tpg = tpg; |
| 413 | acl->acl_index = scsi_get_new_index(SCSI_AUTH_INTR_INDEX); |
| 414 | spin_lock_init(&acl->stats_lock); |
| 415 | |
Andy Grover | e3d6f90 | 2011-07-19 08:55:10 +0000 | [diff] [blame] | 416 | tpg->se_tpg_tfo->set_default_node_attributes(acl); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 417 | |
| 418 | if (core_create_device_list_for_node(acl) < 0) { |
Andy Grover | e3d6f90 | 2011-07-19 08:55:10 +0000 | [diff] [blame] | 419 | tpg->se_tpg_tfo->tpg_release_fabric_acl(tpg, acl); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 420 | return ERR_PTR(-ENOMEM); |
| 421 | } |
| 422 | |
| 423 | if (core_set_queue_depth_for_node(tpg, acl) < 0) { |
| 424 | core_free_device_list_for_node(acl, tpg); |
Andy Grover | e3d6f90 | 2011-07-19 08:55:10 +0000 | [diff] [blame] | 425 | tpg->se_tpg_tfo->tpg_release_fabric_acl(tpg, acl); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 426 | return ERR_PTR(-EINVAL); |
| 427 | } |
| 428 | |
| 429 | spin_lock_bh(&tpg->acl_node_lock); |
| 430 | list_add_tail(&acl->acl_list, &tpg->acl_node_list); |
| 431 | tpg->num_node_acls++; |
| 432 | spin_unlock_bh(&tpg->acl_node_lock); |
| 433 | |
| 434 | done: |
Andy Grover | 6708bb2 | 2011-06-08 10:36:43 -0700 | [diff] [blame] | 435 | pr_debug("%s_TPG[%hu] - Added ACL with TCQ Depth: %d for %s" |
Andy Grover | e3d6f90 | 2011-07-19 08:55:10 +0000 | [diff] [blame] | 436 | " Initiator Node: %s\n", tpg->se_tpg_tfo->get_fabric_name(), |
| 437 | tpg->se_tpg_tfo->tpg_get_tag(tpg), acl->queue_depth, |
| 438 | tpg->se_tpg_tfo->get_fabric_name(), initiatorname); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 439 | |
| 440 | return acl; |
| 441 | } |
| 442 | EXPORT_SYMBOL(core_tpg_add_initiator_node_acl); |
| 443 | |
| 444 | /* core_tpg_del_initiator_node_acl(): |
| 445 | * |
| 446 | * |
| 447 | */ |
| 448 | int core_tpg_del_initiator_node_acl( |
| 449 | struct se_portal_group *tpg, |
| 450 | struct se_node_acl *acl, |
| 451 | int force) |
| 452 | { |
| 453 | struct se_session *sess, *sess_tmp; |
| 454 | int dynamic_acl = 0; |
| 455 | |
| 456 | spin_lock_bh(&tpg->acl_node_lock); |
| 457 | if (acl->dynamic_node_acl) { |
| 458 | acl->dynamic_node_acl = 0; |
| 459 | dynamic_acl = 1; |
| 460 | } |
| 461 | list_del(&acl->acl_list); |
| 462 | tpg->num_node_acls--; |
| 463 | spin_unlock_bh(&tpg->acl_node_lock); |
| 464 | |
| 465 | spin_lock_bh(&tpg->session_lock); |
| 466 | list_for_each_entry_safe(sess, sess_tmp, |
| 467 | &tpg->tpg_sess_list, sess_list) { |
| 468 | if (sess->se_node_acl != acl) |
| 469 | continue; |
| 470 | /* |
| 471 | * Determine if the session needs to be closed by our context. |
| 472 | */ |
Andy Grover | 6708bb2 | 2011-06-08 10:36:43 -0700 | [diff] [blame] | 473 | if (!tpg->se_tpg_tfo->shutdown_session(sess)) |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 474 | continue; |
| 475 | |
| 476 | spin_unlock_bh(&tpg->session_lock); |
| 477 | /* |
| 478 | * If the $FABRIC_MOD session for the Initiator Node ACL exists, |
| 479 | * forcefully shutdown the $FABRIC_MOD session/nexus. |
| 480 | */ |
Andy Grover | e3d6f90 | 2011-07-19 08:55:10 +0000 | [diff] [blame] | 481 | tpg->se_tpg_tfo->close_session(sess); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 482 | |
| 483 | spin_lock_bh(&tpg->session_lock); |
| 484 | } |
| 485 | spin_unlock_bh(&tpg->session_lock); |
| 486 | |
| 487 | core_tpg_wait_for_nacl_pr_ref(acl); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 488 | core_clear_initiator_node_from_tpg(acl, tpg); |
| 489 | core_free_device_list_for_node(acl, tpg); |
| 490 | |
Andy Grover | 6708bb2 | 2011-06-08 10:36:43 -0700 | [diff] [blame] | 491 | 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] | 492 | " Initiator Node: %s\n", tpg->se_tpg_tfo->get_fabric_name(), |
| 493 | tpg->se_tpg_tfo->tpg_get_tag(tpg), acl->queue_depth, |
| 494 | tpg->se_tpg_tfo->get_fabric_name(), acl->initiatorname); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 495 | |
| 496 | return 0; |
| 497 | } |
| 498 | EXPORT_SYMBOL(core_tpg_del_initiator_node_acl); |
| 499 | |
| 500 | /* core_tpg_set_initiator_node_queue_depth(): |
| 501 | * |
| 502 | * |
| 503 | */ |
| 504 | int core_tpg_set_initiator_node_queue_depth( |
| 505 | struct se_portal_group *tpg, |
| 506 | unsigned char *initiatorname, |
| 507 | u32 queue_depth, |
| 508 | int force) |
| 509 | { |
| 510 | struct se_session *sess, *init_sess = NULL; |
| 511 | struct se_node_acl *acl; |
| 512 | int dynamic_acl = 0; |
| 513 | |
| 514 | spin_lock_bh(&tpg->acl_node_lock); |
| 515 | acl = __core_tpg_get_initiator_node_acl(tpg, initiatorname); |
Andy Grover | 6708bb2 | 2011-06-08 10:36:43 -0700 | [diff] [blame] | 516 | if (!acl) { |
| 517 | pr_err("Access Control List entry for %s Initiator" |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 518 | " Node %s does not exists for TPG %hu, ignoring" |
Andy Grover | e3d6f90 | 2011-07-19 08:55:10 +0000 | [diff] [blame] | 519 | " request.\n", tpg->se_tpg_tfo->get_fabric_name(), |
| 520 | initiatorname, tpg->se_tpg_tfo->tpg_get_tag(tpg)); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 521 | spin_unlock_bh(&tpg->acl_node_lock); |
| 522 | return -ENODEV; |
| 523 | } |
| 524 | if (acl->dynamic_node_acl) { |
| 525 | acl->dynamic_node_acl = 0; |
| 526 | dynamic_acl = 1; |
| 527 | } |
| 528 | spin_unlock_bh(&tpg->acl_node_lock); |
| 529 | |
| 530 | spin_lock_bh(&tpg->session_lock); |
| 531 | list_for_each_entry(sess, &tpg->tpg_sess_list, sess_list) { |
| 532 | if (sess->se_node_acl != acl) |
| 533 | continue; |
| 534 | |
| 535 | if (!force) { |
Andy Grover | 6708bb2 | 2011-06-08 10:36:43 -0700 | [diff] [blame] | 536 | pr_err("Unable to change queue depth for %s" |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 537 | " Initiator Node: %s while session is" |
| 538 | " operational. To forcefully change the queue" |
| 539 | " depth and force session reinstatement" |
| 540 | " use the \"force=1\" parameter.\n", |
Andy Grover | e3d6f90 | 2011-07-19 08:55:10 +0000 | [diff] [blame] | 541 | tpg->se_tpg_tfo->get_fabric_name(), initiatorname); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 542 | spin_unlock_bh(&tpg->session_lock); |
| 543 | |
| 544 | spin_lock_bh(&tpg->acl_node_lock); |
| 545 | if (dynamic_acl) |
| 546 | acl->dynamic_node_acl = 1; |
| 547 | spin_unlock_bh(&tpg->acl_node_lock); |
| 548 | return -EEXIST; |
| 549 | } |
| 550 | /* |
| 551 | * Determine if the session needs to be closed by our context. |
| 552 | */ |
Andy Grover | 6708bb2 | 2011-06-08 10:36:43 -0700 | [diff] [blame] | 553 | if (!tpg->se_tpg_tfo->shutdown_session(sess)) |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 554 | continue; |
| 555 | |
| 556 | init_sess = sess; |
| 557 | break; |
| 558 | } |
| 559 | |
| 560 | /* |
| 561 | * User has requested to change the queue depth for a Initiator Node. |
| 562 | * Change the value in the Node's struct se_node_acl, and call |
| 563 | * core_set_queue_depth_for_node() to add the requested queue depth. |
| 564 | * |
Andy Grover | e3d6f90 | 2011-07-19 08:55:10 +0000 | [diff] [blame] | 565 | * Finally call tpg->se_tpg_tfo->close_session() to force session |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 566 | * reinstatement to occur if there is an active session for the |
| 567 | * $FABRIC_MOD Initiator Node in question. |
| 568 | */ |
| 569 | acl->queue_depth = queue_depth; |
| 570 | |
| 571 | if (core_set_queue_depth_for_node(tpg, acl) < 0) { |
| 572 | spin_unlock_bh(&tpg->session_lock); |
| 573 | /* |
| 574 | * Force session reinstatement if |
| 575 | * core_set_queue_depth_for_node() failed, because we assume |
| 576 | * the $FABRIC_MOD has already the set session reinstatement |
Andy Grover | e3d6f90 | 2011-07-19 08:55:10 +0000 | [diff] [blame] | 577 | * bit from tpg->se_tpg_tfo->shutdown_session() called above. |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 578 | */ |
| 579 | if (init_sess) |
Andy Grover | e3d6f90 | 2011-07-19 08:55:10 +0000 | [diff] [blame] | 580 | tpg->se_tpg_tfo->close_session(init_sess); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 581 | |
| 582 | spin_lock_bh(&tpg->acl_node_lock); |
| 583 | if (dynamic_acl) |
| 584 | acl->dynamic_node_acl = 1; |
| 585 | spin_unlock_bh(&tpg->acl_node_lock); |
| 586 | return -EINVAL; |
| 587 | } |
| 588 | spin_unlock_bh(&tpg->session_lock); |
| 589 | /* |
| 590 | * If the $FABRIC_MOD session for the Initiator Node ACL exists, |
| 591 | * forcefully shutdown the $FABRIC_MOD session/nexus. |
| 592 | */ |
| 593 | if (init_sess) |
Andy Grover | e3d6f90 | 2011-07-19 08:55:10 +0000 | [diff] [blame] | 594 | tpg->se_tpg_tfo->close_session(init_sess); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 595 | |
Andy Grover | 6708bb2 | 2011-06-08 10:36:43 -0700 | [diff] [blame] | 596 | pr_debug("Successfuly changed queue depth to: %d for Initiator" |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 597 | " Node: %s on %s Target Portal Group: %u\n", queue_depth, |
Andy Grover | e3d6f90 | 2011-07-19 08:55:10 +0000 | [diff] [blame] | 598 | initiatorname, tpg->se_tpg_tfo->get_fabric_name(), |
| 599 | tpg->se_tpg_tfo->tpg_get_tag(tpg)); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 600 | |
| 601 | spin_lock_bh(&tpg->acl_node_lock); |
| 602 | if (dynamic_acl) |
| 603 | acl->dynamic_node_acl = 1; |
| 604 | spin_unlock_bh(&tpg->acl_node_lock); |
| 605 | |
| 606 | return 0; |
| 607 | } |
| 608 | EXPORT_SYMBOL(core_tpg_set_initiator_node_queue_depth); |
| 609 | |
| 610 | static int core_tpg_setup_virtual_lun0(struct se_portal_group *se_tpg) |
| 611 | { |
| 612 | /* Set in core_dev_setup_virtual_lun0() */ |
Andy Grover | e3d6f90 | 2011-07-19 08:55:10 +0000 | [diff] [blame] | 613 | struct se_device *dev = g_lun0_dev; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 614 | struct se_lun *lun = &se_tpg->tpg_virt_lun0; |
| 615 | u32 lun_access = TRANSPORT_LUNFLAGS_READ_ONLY; |
| 616 | int ret; |
| 617 | |
| 618 | lun->unpacked_lun = 0; |
| 619 | lun->lun_status = TRANSPORT_LUN_STATUS_FREE; |
| 620 | atomic_set(&lun->lun_acl_count, 0); |
| 621 | init_completion(&lun->lun_shutdown_comp); |
| 622 | INIT_LIST_HEAD(&lun->lun_acl_list); |
| 623 | INIT_LIST_HEAD(&lun->lun_cmd_list); |
| 624 | spin_lock_init(&lun->lun_acl_lock); |
| 625 | spin_lock_init(&lun->lun_cmd_lock); |
| 626 | spin_lock_init(&lun->lun_sep_lock); |
| 627 | |
| 628 | ret = core_tpg_post_addlun(se_tpg, lun, lun_access, dev); |
| 629 | if (ret < 0) |
Andy Grover | e3d6f90 | 2011-07-19 08:55:10 +0000 | [diff] [blame] | 630 | return ret; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 631 | |
| 632 | return 0; |
| 633 | } |
| 634 | |
| 635 | static void core_tpg_release_virtual_lun0(struct se_portal_group *se_tpg) |
| 636 | { |
| 637 | struct se_lun *lun = &se_tpg->tpg_virt_lun0; |
| 638 | |
| 639 | core_tpg_post_dellun(se_tpg, lun); |
| 640 | } |
| 641 | |
| 642 | int core_tpg_register( |
| 643 | struct target_core_fabric_ops *tfo, |
| 644 | struct se_wwn *se_wwn, |
| 645 | struct se_portal_group *se_tpg, |
| 646 | void *tpg_fabric_ptr, |
| 647 | int se_tpg_type) |
| 648 | { |
| 649 | struct se_lun *lun; |
| 650 | u32 i; |
| 651 | |
| 652 | se_tpg->tpg_lun_list = kzalloc((sizeof(struct se_lun) * |
| 653 | TRANSPORT_MAX_LUNS_PER_TPG), GFP_KERNEL); |
Andy Grover | 6708bb2 | 2011-06-08 10:36:43 -0700 | [diff] [blame] | 654 | if (!se_tpg->tpg_lun_list) { |
| 655 | pr_err("Unable to allocate struct se_portal_group->" |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 656 | "tpg_lun_list\n"); |
| 657 | return -ENOMEM; |
| 658 | } |
| 659 | |
| 660 | for (i = 0; i < TRANSPORT_MAX_LUNS_PER_TPG; i++) { |
| 661 | lun = &se_tpg->tpg_lun_list[i]; |
| 662 | lun->unpacked_lun = i; |
| 663 | lun->lun_status = TRANSPORT_LUN_STATUS_FREE; |
| 664 | atomic_set(&lun->lun_acl_count, 0); |
| 665 | init_completion(&lun->lun_shutdown_comp); |
| 666 | INIT_LIST_HEAD(&lun->lun_acl_list); |
| 667 | INIT_LIST_HEAD(&lun->lun_cmd_list); |
| 668 | spin_lock_init(&lun->lun_acl_lock); |
| 669 | spin_lock_init(&lun->lun_cmd_lock); |
| 670 | spin_lock_init(&lun->lun_sep_lock); |
| 671 | } |
| 672 | |
| 673 | se_tpg->se_tpg_type = se_tpg_type; |
| 674 | se_tpg->se_tpg_fabric_ptr = tpg_fabric_ptr; |
| 675 | se_tpg->se_tpg_tfo = tfo; |
| 676 | se_tpg->se_tpg_wwn = se_wwn; |
| 677 | atomic_set(&se_tpg->tpg_pr_ref_count, 0); |
| 678 | INIT_LIST_HEAD(&se_tpg->acl_node_list); |
Andy Grover | e3d6f90 | 2011-07-19 08:55:10 +0000 | [diff] [blame] | 679 | INIT_LIST_HEAD(&se_tpg->se_tpg_node); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 680 | INIT_LIST_HEAD(&se_tpg->tpg_sess_list); |
| 681 | spin_lock_init(&se_tpg->acl_node_lock); |
| 682 | spin_lock_init(&se_tpg->session_lock); |
| 683 | spin_lock_init(&se_tpg->tpg_lun_lock); |
| 684 | |
| 685 | if (se_tpg->se_tpg_type == TRANSPORT_TPG_TYPE_NORMAL) { |
| 686 | if (core_tpg_setup_virtual_lun0(se_tpg) < 0) { |
| 687 | kfree(se_tpg); |
| 688 | return -ENOMEM; |
| 689 | } |
| 690 | } |
| 691 | |
Andy Grover | e3d6f90 | 2011-07-19 08:55:10 +0000 | [diff] [blame] | 692 | spin_lock_bh(&tpg_lock); |
| 693 | list_add_tail(&se_tpg->se_tpg_node, &tpg_list); |
| 694 | spin_unlock_bh(&tpg_lock); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 695 | |
Andy Grover | 6708bb2 | 2011-06-08 10:36:43 -0700 | [diff] [blame] | 696 | pr_debug("TARGET_CORE[%s]: Allocated %s struct se_portal_group for" |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 697 | " endpoint: %s, Portal Tag: %u\n", tfo->get_fabric_name(), |
| 698 | (se_tpg->se_tpg_type == TRANSPORT_TPG_TYPE_NORMAL) ? |
| 699 | "Normal" : "Discovery", (tfo->tpg_get_wwn(se_tpg) == NULL) ? |
| 700 | "None" : tfo->tpg_get_wwn(se_tpg), tfo->tpg_get_tag(se_tpg)); |
| 701 | |
| 702 | return 0; |
| 703 | } |
| 704 | EXPORT_SYMBOL(core_tpg_register); |
| 705 | |
| 706 | int core_tpg_deregister(struct se_portal_group *se_tpg) |
| 707 | { |
Nicholas Bellinger | e89d15e | 2011-02-09 15:35:03 -0800 | [diff] [blame] | 708 | struct se_node_acl *nacl, *nacl_tmp; |
| 709 | |
Andy Grover | 6708bb2 | 2011-06-08 10:36:43 -0700 | [diff] [blame] | 710 | pr_debug("TARGET_CORE[%s]: Deallocating %s struct se_portal_group" |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 711 | " for endpoint: %s Portal Tag %u\n", |
| 712 | (se_tpg->se_tpg_type == TRANSPORT_TPG_TYPE_NORMAL) ? |
Andy Grover | e3d6f90 | 2011-07-19 08:55:10 +0000 | [diff] [blame] | 713 | "Normal" : "Discovery", se_tpg->se_tpg_tfo->get_fabric_name(), |
| 714 | se_tpg->se_tpg_tfo->tpg_get_wwn(se_tpg), |
| 715 | se_tpg->se_tpg_tfo->tpg_get_tag(se_tpg)); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 716 | |
Andy Grover | e3d6f90 | 2011-07-19 08:55:10 +0000 | [diff] [blame] | 717 | spin_lock_bh(&tpg_lock); |
| 718 | list_del(&se_tpg->se_tpg_node); |
| 719 | spin_unlock_bh(&tpg_lock); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 720 | |
| 721 | while (atomic_read(&se_tpg->tpg_pr_ref_count) != 0) |
| 722 | cpu_relax(); |
Nicholas Bellinger | e89d15e | 2011-02-09 15:35:03 -0800 | [diff] [blame] | 723 | /* |
| 724 | * Release any remaining demo-mode generated se_node_acl that have |
| 725 | * not been released because of TFO->tpg_check_demo_mode_cache() == 1 |
| 726 | * in transport_deregister_session(). |
| 727 | */ |
| 728 | spin_lock_bh(&se_tpg->acl_node_lock); |
| 729 | list_for_each_entry_safe(nacl, nacl_tmp, &se_tpg->acl_node_list, |
| 730 | acl_list) { |
| 731 | list_del(&nacl->acl_list); |
| 732 | se_tpg->num_node_acls--; |
| 733 | spin_unlock_bh(&se_tpg->acl_node_lock); |
| 734 | |
| 735 | core_tpg_wait_for_nacl_pr_ref(nacl); |
| 736 | core_free_device_list_for_node(nacl, se_tpg); |
Andy Grover | e3d6f90 | 2011-07-19 08:55:10 +0000 | [diff] [blame] | 737 | se_tpg->se_tpg_tfo->tpg_release_fabric_acl(se_tpg, nacl); |
Nicholas Bellinger | e89d15e | 2011-02-09 15:35:03 -0800 | [diff] [blame] | 738 | |
| 739 | spin_lock_bh(&se_tpg->acl_node_lock); |
| 740 | } |
| 741 | spin_unlock_bh(&se_tpg->acl_node_lock); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 742 | |
| 743 | if (se_tpg->se_tpg_type == TRANSPORT_TPG_TYPE_NORMAL) |
| 744 | core_tpg_release_virtual_lun0(se_tpg); |
| 745 | |
| 746 | se_tpg->se_tpg_fabric_ptr = NULL; |
| 747 | kfree(se_tpg->tpg_lun_list); |
| 748 | return 0; |
| 749 | } |
| 750 | EXPORT_SYMBOL(core_tpg_deregister); |
| 751 | |
| 752 | struct se_lun *core_tpg_pre_addlun( |
| 753 | struct se_portal_group *tpg, |
| 754 | u32 unpacked_lun) |
| 755 | { |
| 756 | struct se_lun *lun; |
| 757 | |
| 758 | if (unpacked_lun > (TRANSPORT_MAX_LUNS_PER_TPG-1)) { |
Andy Grover | 6708bb2 | 2011-06-08 10:36:43 -0700 | [diff] [blame] | 759 | pr_err("%s LUN: %u exceeds TRANSPORT_MAX_LUNS_PER_TPG" |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 760 | "-1: %u for Target Portal Group: %u\n", |
Andy Grover | e3d6f90 | 2011-07-19 08:55:10 +0000 | [diff] [blame] | 761 | tpg->se_tpg_tfo->get_fabric_name(), |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 762 | unpacked_lun, TRANSPORT_MAX_LUNS_PER_TPG-1, |
Andy Grover | e3d6f90 | 2011-07-19 08:55:10 +0000 | [diff] [blame] | 763 | tpg->se_tpg_tfo->tpg_get_tag(tpg)); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 764 | return ERR_PTR(-EOVERFLOW); |
| 765 | } |
| 766 | |
| 767 | spin_lock(&tpg->tpg_lun_lock); |
| 768 | lun = &tpg->tpg_lun_list[unpacked_lun]; |
| 769 | if (lun->lun_status == TRANSPORT_LUN_STATUS_ACTIVE) { |
Andy Grover | 6708bb2 | 2011-06-08 10:36:43 -0700 | [diff] [blame] | 770 | pr_err("TPG Logical Unit Number: %u is already active" |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 771 | " on %s Target Portal Group: %u, ignoring request.\n", |
Andy Grover | e3d6f90 | 2011-07-19 08:55:10 +0000 | [diff] [blame] | 772 | unpacked_lun, tpg->se_tpg_tfo->get_fabric_name(), |
| 773 | tpg->se_tpg_tfo->tpg_get_tag(tpg)); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 774 | spin_unlock(&tpg->tpg_lun_lock); |
| 775 | return ERR_PTR(-EINVAL); |
| 776 | } |
| 777 | spin_unlock(&tpg->tpg_lun_lock); |
| 778 | |
| 779 | return lun; |
| 780 | } |
| 781 | |
| 782 | int core_tpg_post_addlun( |
| 783 | struct se_portal_group *tpg, |
| 784 | struct se_lun *lun, |
| 785 | u32 lun_access, |
| 786 | void *lun_ptr) |
| 787 | { |
Andy Grover | e3d6f90 | 2011-07-19 08:55:10 +0000 | [diff] [blame] | 788 | int ret; |
| 789 | |
| 790 | ret = core_dev_export(lun_ptr, tpg, lun); |
| 791 | if (ret < 0) |
| 792 | return ret; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 793 | |
| 794 | spin_lock(&tpg->tpg_lun_lock); |
| 795 | lun->lun_access = lun_access; |
| 796 | lun->lun_status = TRANSPORT_LUN_STATUS_ACTIVE; |
| 797 | spin_unlock(&tpg->tpg_lun_lock); |
| 798 | |
| 799 | return 0; |
| 800 | } |
| 801 | |
| 802 | static void core_tpg_shutdown_lun( |
| 803 | struct se_portal_group *tpg, |
| 804 | struct se_lun *lun) |
| 805 | { |
| 806 | core_clear_lun_from_tpg(lun, tpg); |
| 807 | transport_clear_lun_from_sessions(lun); |
| 808 | } |
| 809 | |
| 810 | struct se_lun *core_tpg_pre_dellun( |
| 811 | struct se_portal_group *tpg, |
| 812 | u32 unpacked_lun, |
| 813 | int *ret) |
| 814 | { |
| 815 | struct se_lun *lun; |
| 816 | |
| 817 | if (unpacked_lun > (TRANSPORT_MAX_LUNS_PER_TPG-1)) { |
Andy Grover | 6708bb2 | 2011-06-08 10:36:43 -0700 | [diff] [blame] | 818 | pr_err("%s LUN: %u exceeds TRANSPORT_MAX_LUNS_PER_TPG" |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 819 | "-1: %u for Target Portal Group: %u\n", |
Andy Grover | e3d6f90 | 2011-07-19 08:55:10 +0000 | [diff] [blame] | 820 | tpg->se_tpg_tfo->get_fabric_name(), unpacked_lun, |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 821 | TRANSPORT_MAX_LUNS_PER_TPG-1, |
Andy Grover | e3d6f90 | 2011-07-19 08:55:10 +0000 | [diff] [blame] | 822 | tpg->se_tpg_tfo->tpg_get_tag(tpg)); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 823 | return ERR_PTR(-EOVERFLOW); |
| 824 | } |
| 825 | |
| 826 | spin_lock(&tpg->tpg_lun_lock); |
| 827 | lun = &tpg->tpg_lun_list[unpacked_lun]; |
| 828 | if (lun->lun_status != TRANSPORT_LUN_STATUS_ACTIVE) { |
Andy Grover | 6708bb2 | 2011-06-08 10:36:43 -0700 | [diff] [blame] | 829 | pr_err("%s Logical Unit Number: %u is not active on" |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 830 | " Target Portal Group: %u, ignoring request.\n", |
Andy Grover | e3d6f90 | 2011-07-19 08:55:10 +0000 | [diff] [blame] | 831 | tpg->se_tpg_tfo->get_fabric_name(), unpacked_lun, |
| 832 | tpg->se_tpg_tfo->tpg_get_tag(tpg)); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 833 | spin_unlock(&tpg->tpg_lun_lock); |
| 834 | return ERR_PTR(-ENODEV); |
| 835 | } |
| 836 | spin_unlock(&tpg->tpg_lun_lock); |
| 837 | |
| 838 | return lun; |
| 839 | } |
| 840 | |
| 841 | int core_tpg_post_dellun( |
| 842 | struct se_portal_group *tpg, |
| 843 | struct se_lun *lun) |
| 844 | { |
| 845 | core_tpg_shutdown_lun(tpg, lun); |
| 846 | |
| 847 | core_dev_unexport(lun->lun_se_dev, tpg, lun); |
| 848 | |
| 849 | spin_lock(&tpg->tpg_lun_lock); |
| 850 | lun->lun_status = TRANSPORT_LUN_STATUS_FREE; |
| 851 | spin_unlock(&tpg->tpg_lun_lock); |
| 852 | |
| 853 | return 0; |
| 854 | } |