| 1 | /******************************************************************************* |
| 2 | * Filename: target_core_device.c (based on iscsi_target_device.c) |
| 3 | * |
| 4 | * This file contains the TCM Virtual Device and Disk Transport |
| 5 | * agnostic related functions. |
| 6 | * |
| 7 | * (c) Copyright 2003-2013 Datera, Inc. |
| 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 | |
| 27 | #include <linux/net.h> |
| 28 | #include <linux/string.h> |
| 29 | #include <linux/delay.h> |
| 30 | #include <linux/timer.h> |
| 31 | #include <linux/slab.h> |
| 32 | #include <linux/spinlock.h> |
| 33 | #include <linux/kthread.h> |
| 34 | #include <linux/in.h> |
| 35 | #include <linux/export.h> |
| 36 | #include <net/sock.h> |
| 37 | #include <net/tcp.h> |
| 38 | #include <scsi/scsi.h> |
| 39 | #include <scsi/scsi_device.h> |
| 40 | |
| 41 | #include <target/target_core_base.h> |
| 42 | #include <target/target_core_backend.h> |
| 43 | #include <target/target_core_fabric.h> |
| 44 | |
| 45 | #include "target_core_internal.h" |
| 46 | #include "target_core_alua.h" |
| 47 | #include "target_core_pr.h" |
| 48 | #include "target_core_ua.h" |
| 49 | |
| 50 | DEFINE_MUTEX(g_device_mutex); |
| 51 | LIST_HEAD(g_device_list); |
| 52 | |
| 53 | static struct se_hba *lun0_hba; |
| 54 | /* not static, needed by tpg.c */ |
| 55 | struct se_device *g_lun0_dev; |
| 56 | |
| 57 | sense_reason_t |
| 58 | transport_lookup_cmd_lun(struct se_cmd *se_cmd, u32 unpacked_lun) |
| 59 | { |
| 60 | struct se_lun *se_lun = NULL; |
| 61 | struct se_session *se_sess = se_cmd->se_sess; |
| 62 | struct se_device *dev; |
| 63 | unsigned long flags; |
| 64 | |
| 65 | if (unpacked_lun >= TRANSPORT_MAX_LUNS_PER_TPG) |
| 66 | return TCM_NON_EXISTENT_LUN; |
| 67 | |
| 68 | spin_lock_irqsave(&se_sess->se_node_acl->device_list_lock, flags); |
| 69 | se_cmd->se_deve = se_sess->se_node_acl->device_list[unpacked_lun]; |
| 70 | if (se_cmd->se_deve->lun_flags & TRANSPORT_LUNFLAGS_INITIATOR_ACCESS) { |
| 71 | struct se_dev_entry *deve = se_cmd->se_deve; |
| 72 | |
| 73 | deve->total_cmds++; |
| 74 | |
| 75 | if ((se_cmd->data_direction == DMA_TO_DEVICE) && |
| 76 | (deve->lun_flags & TRANSPORT_LUNFLAGS_READ_ONLY)) { |
| 77 | pr_err("TARGET_CORE[%s]: Detected WRITE_PROTECTED LUN" |
| 78 | " Access for 0x%08x\n", |
| 79 | se_cmd->se_tfo->get_fabric_name(), |
| 80 | unpacked_lun); |
| 81 | spin_unlock_irqrestore(&se_sess->se_node_acl->device_list_lock, flags); |
| 82 | return TCM_WRITE_PROTECTED; |
| 83 | } |
| 84 | |
| 85 | if (se_cmd->data_direction == DMA_TO_DEVICE) |
| 86 | deve->write_bytes += se_cmd->data_length; |
| 87 | else if (se_cmd->data_direction == DMA_FROM_DEVICE) |
| 88 | deve->read_bytes += se_cmd->data_length; |
| 89 | |
| 90 | se_lun = deve->se_lun; |
| 91 | se_cmd->se_lun = deve->se_lun; |
| 92 | se_cmd->pr_res_key = deve->pr_res_key; |
| 93 | se_cmd->orig_fe_lun = unpacked_lun; |
| 94 | se_cmd->se_cmd_flags |= SCF_SE_LUN_CMD; |
| 95 | |
| 96 | percpu_ref_get(&se_lun->lun_ref); |
| 97 | se_cmd->lun_ref_active = true; |
| 98 | } |
| 99 | spin_unlock_irqrestore(&se_sess->se_node_acl->device_list_lock, flags); |
| 100 | |
| 101 | if (!se_lun) { |
| 102 | /* |
| 103 | * Use the se_portal_group->tpg_virt_lun0 to allow for |
| 104 | * REPORT_LUNS, et al to be returned when no active |
| 105 | * MappedLUN=0 exists for this Initiator Port. |
| 106 | */ |
| 107 | if (unpacked_lun != 0) { |
| 108 | pr_err("TARGET_CORE[%s]: Detected NON_EXISTENT_LUN" |
| 109 | " Access for 0x%08x\n", |
| 110 | se_cmd->se_tfo->get_fabric_name(), |
| 111 | unpacked_lun); |
| 112 | return TCM_NON_EXISTENT_LUN; |
| 113 | } |
| 114 | /* |
| 115 | * Force WRITE PROTECT for virtual LUN 0 |
| 116 | */ |
| 117 | if ((se_cmd->data_direction != DMA_FROM_DEVICE) && |
| 118 | (se_cmd->data_direction != DMA_NONE)) |
| 119 | return TCM_WRITE_PROTECTED; |
| 120 | |
| 121 | se_lun = &se_sess->se_tpg->tpg_virt_lun0; |
| 122 | se_cmd->se_lun = &se_sess->se_tpg->tpg_virt_lun0; |
| 123 | se_cmd->orig_fe_lun = 0; |
| 124 | se_cmd->se_cmd_flags |= SCF_SE_LUN_CMD; |
| 125 | |
| 126 | percpu_ref_get(&se_lun->lun_ref); |
| 127 | se_cmd->lun_ref_active = true; |
| 128 | } |
| 129 | |
| 130 | /* Directly associate cmd with se_dev */ |
| 131 | se_cmd->se_dev = se_lun->lun_se_dev; |
| 132 | |
| 133 | dev = se_lun->lun_se_dev; |
| 134 | atomic_long_inc(&dev->num_cmds); |
| 135 | if (se_cmd->data_direction == DMA_TO_DEVICE) |
| 136 | atomic_long_add(se_cmd->data_length, &dev->write_bytes); |
| 137 | else if (se_cmd->data_direction == DMA_FROM_DEVICE) |
| 138 | atomic_long_add(se_cmd->data_length, &dev->read_bytes); |
| 139 | |
| 140 | return 0; |
| 141 | } |
| 142 | EXPORT_SYMBOL(transport_lookup_cmd_lun); |
| 143 | |
| 144 | int transport_lookup_tmr_lun(struct se_cmd *se_cmd, u32 unpacked_lun) |
| 145 | { |
| 146 | struct se_dev_entry *deve; |
| 147 | struct se_lun *se_lun = NULL; |
| 148 | struct se_session *se_sess = se_cmd->se_sess; |
| 149 | struct se_tmr_req *se_tmr = se_cmd->se_tmr_req; |
| 150 | unsigned long flags; |
| 151 | |
| 152 | if (unpacked_lun >= TRANSPORT_MAX_LUNS_PER_TPG) |
| 153 | return -ENODEV; |
| 154 | |
| 155 | spin_lock_irqsave(&se_sess->se_node_acl->device_list_lock, flags); |
| 156 | se_cmd->se_deve = se_sess->se_node_acl->device_list[unpacked_lun]; |
| 157 | deve = se_cmd->se_deve; |
| 158 | |
| 159 | if (deve->lun_flags & TRANSPORT_LUNFLAGS_INITIATOR_ACCESS) { |
| 160 | se_tmr->tmr_lun = deve->se_lun; |
| 161 | se_cmd->se_lun = deve->se_lun; |
| 162 | se_lun = deve->se_lun; |
| 163 | se_cmd->pr_res_key = deve->pr_res_key; |
| 164 | se_cmd->orig_fe_lun = unpacked_lun; |
| 165 | } |
| 166 | spin_unlock_irqrestore(&se_sess->se_node_acl->device_list_lock, flags); |
| 167 | |
| 168 | if (!se_lun) { |
| 169 | pr_debug("TARGET_CORE[%s]: Detected NON_EXISTENT_LUN" |
| 170 | " Access for 0x%08x\n", |
| 171 | se_cmd->se_tfo->get_fabric_name(), |
| 172 | unpacked_lun); |
| 173 | return -ENODEV; |
| 174 | } |
| 175 | |
| 176 | /* Directly associate cmd with se_dev */ |
| 177 | se_cmd->se_dev = se_lun->lun_se_dev; |
| 178 | se_tmr->tmr_dev = se_lun->lun_se_dev; |
| 179 | |
| 180 | spin_lock_irqsave(&se_tmr->tmr_dev->se_tmr_lock, flags); |
| 181 | list_add_tail(&se_tmr->tmr_list, &se_tmr->tmr_dev->dev_tmr_list); |
| 182 | spin_unlock_irqrestore(&se_tmr->tmr_dev->se_tmr_lock, flags); |
| 183 | |
| 184 | return 0; |
| 185 | } |
| 186 | EXPORT_SYMBOL(transport_lookup_tmr_lun); |
| 187 | |
| 188 | /* |
| 189 | * This function is called from core_scsi3_emulate_pro_register_and_move() |
| 190 | * and core_scsi3_decode_spec_i_port(), and will increment &deve->pr_ref_count |
| 191 | * when a matching rtpi is found. |
| 192 | */ |
| 193 | struct se_dev_entry *core_get_se_deve_from_rtpi( |
| 194 | struct se_node_acl *nacl, |
| 195 | u16 rtpi) |
| 196 | { |
| 197 | struct se_dev_entry *deve; |
| 198 | struct se_lun *lun; |
| 199 | struct se_port *port; |
| 200 | struct se_portal_group *tpg = nacl->se_tpg; |
| 201 | u32 i; |
| 202 | |
| 203 | spin_lock_irq(&nacl->device_list_lock); |
| 204 | for (i = 0; i < TRANSPORT_MAX_LUNS_PER_TPG; i++) { |
| 205 | deve = nacl->device_list[i]; |
| 206 | |
| 207 | if (!(deve->lun_flags & TRANSPORT_LUNFLAGS_INITIATOR_ACCESS)) |
| 208 | continue; |
| 209 | |
| 210 | lun = deve->se_lun; |
| 211 | if (!lun) { |
| 212 | pr_err("%s device entries device pointer is" |
| 213 | " NULL, but Initiator has access.\n", |
| 214 | tpg->se_tpg_tfo->get_fabric_name()); |
| 215 | continue; |
| 216 | } |
| 217 | port = lun->lun_sep; |
| 218 | if (!port) { |
| 219 | pr_err("%s device entries device pointer is" |
| 220 | " NULL, but Initiator has access.\n", |
| 221 | tpg->se_tpg_tfo->get_fabric_name()); |
| 222 | continue; |
| 223 | } |
| 224 | if (port->sep_rtpi != rtpi) |
| 225 | continue; |
| 226 | |
| 227 | atomic_inc(&deve->pr_ref_count); |
| 228 | smp_mb__after_atomic_inc(); |
| 229 | spin_unlock_irq(&nacl->device_list_lock); |
| 230 | |
| 231 | return deve; |
| 232 | } |
| 233 | spin_unlock_irq(&nacl->device_list_lock); |
| 234 | |
| 235 | return NULL; |
| 236 | } |
| 237 | |
| 238 | int core_free_device_list_for_node( |
| 239 | struct se_node_acl *nacl, |
| 240 | struct se_portal_group *tpg) |
| 241 | { |
| 242 | struct se_dev_entry *deve; |
| 243 | struct se_lun *lun; |
| 244 | u32 i; |
| 245 | |
| 246 | if (!nacl->device_list) |
| 247 | return 0; |
| 248 | |
| 249 | spin_lock_irq(&nacl->device_list_lock); |
| 250 | for (i = 0; i < TRANSPORT_MAX_LUNS_PER_TPG; i++) { |
| 251 | deve = nacl->device_list[i]; |
| 252 | |
| 253 | if (!(deve->lun_flags & TRANSPORT_LUNFLAGS_INITIATOR_ACCESS)) |
| 254 | continue; |
| 255 | |
| 256 | if (!deve->se_lun) { |
| 257 | pr_err("%s device entries device pointer is" |
| 258 | " NULL, but Initiator has access.\n", |
| 259 | tpg->se_tpg_tfo->get_fabric_name()); |
| 260 | continue; |
| 261 | } |
| 262 | lun = deve->se_lun; |
| 263 | |
| 264 | spin_unlock_irq(&nacl->device_list_lock); |
| 265 | core_disable_device_list_for_node(lun, NULL, deve->mapped_lun, |
| 266 | TRANSPORT_LUNFLAGS_NO_ACCESS, nacl, tpg); |
| 267 | spin_lock_irq(&nacl->device_list_lock); |
| 268 | } |
| 269 | spin_unlock_irq(&nacl->device_list_lock); |
| 270 | |
| 271 | array_free(nacl->device_list, TRANSPORT_MAX_LUNS_PER_TPG); |
| 272 | nacl->device_list = NULL; |
| 273 | |
| 274 | return 0; |
| 275 | } |
| 276 | |
| 277 | void core_update_device_list_access( |
| 278 | u32 mapped_lun, |
| 279 | u32 lun_access, |
| 280 | struct se_node_acl *nacl) |
| 281 | { |
| 282 | struct se_dev_entry *deve; |
| 283 | |
| 284 | spin_lock_irq(&nacl->device_list_lock); |
| 285 | deve = nacl->device_list[mapped_lun]; |
| 286 | if (lun_access & TRANSPORT_LUNFLAGS_READ_WRITE) { |
| 287 | deve->lun_flags &= ~TRANSPORT_LUNFLAGS_READ_ONLY; |
| 288 | deve->lun_flags |= TRANSPORT_LUNFLAGS_READ_WRITE; |
| 289 | } else { |
| 290 | deve->lun_flags &= ~TRANSPORT_LUNFLAGS_READ_WRITE; |
| 291 | deve->lun_flags |= TRANSPORT_LUNFLAGS_READ_ONLY; |
| 292 | } |
| 293 | spin_unlock_irq(&nacl->device_list_lock); |
| 294 | } |
| 295 | |
| 296 | /* core_enable_device_list_for_node(): |
| 297 | * |
| 298 | * |
| 299 | */ |
| 300 | int core_enable_device_list_for_node( |
| 301 | struct se_lun *lun, |
| 302 | struct se_lun_acl *lun_acl, |
| 303 | u32 mapped_lun, |
| 304 | u32 lun_access, |
| 305 | struct se_node_acl *nacl, |
| 306 | struct se_portal_group *tpg) |
| 307 | { |
| 308 | struct se_port *port = lun->lun_sep; |
| 309 | struct se_dev_entry *deve; |
| 310 | |
| 311 | spin_lock_irq(&nacl->device_list_lock); |
| 312 | |
| 313 | deve = nacl->device_list[mapped_lun]; |
| 314 | |
| 315 | /* |
| 316 | * Check if the call is handling demo mode -> explicit LUN ACL |
| 317 | * transition. This transition must be for the same struct se_lun |
| 318 | * + mapped_lun that was setup in demo mode.. |
| 319 | */ |
| 320 | if (deve->lun_flags & TRANSPORT_LUNFLAGS_INITIATOR_ACCESS) { |
| 321 | if (deve->se_lun_acl != NULL) { |
| 322 | pr_err("struct se_dev_entry->se_lun_acl" |
| 323 | " already set for demo mode -> explicit" |
| 324 | " LUN ACL transition\n"); |
| 325 | spin_unlock_irq(&nacl->device_list_lock); |
| 326 | return -EINVAL; |
| 327 | } |
| 328 | if (deve->se_lun != lun) { |
| 329 | pr_err("struct se_dev_entry->se_lun does" |
| 330 | " match passed struct se_lun for demo mode" |
| 331 | " -> explicit LUN ACL transition\n"); |
| 332 | spin_unlock_irq(&nacl->device_list_lock); |
| 333 | return -EINVAL; |
| 334 | } |
| 335 | deve->se_lun_acl = lun_acl; |
| 336 | |
| 337 | if (lun_access & TRANSPORT_LUNFLAGS_READ_WRITE) { |
| 338 | deve->lun_flags &= ~TRANSPORT_LUNFLAGS_READ_ONLY; |
| 339 | deve->lun_flags |= TRANSPORT_LUNFLAGS_READ_WRITE; |
| 340 | } else { |
| 341 | deve->lun_flags &= ~TRANSPORT_LUNFLAGS_READ_WRITE; |
| 342 | deve->lun_flags |= TRANSPORT_LUNFLAGS_READ_ONLY; |
| 343 | } |
| 344 | |
| 345 | spin_unlock_irq(&nacl->device_list_lock); |
| 346 | return 0; |
| 347 | } |
| 348 | |
| 349 | deve->se_lun = lun; |
| 350 | deve->se_lun_acl = lun_acl; |
| 351 | deve->mapped_lun = mapped_lun; |
| 352 | deve->lun_flags |= TRANSPORT_LUNFLAGS_INITIATOR_ACCESS; |
| 353 | |
| 354 | if (lun_access & TRANSPORT_LUNFLAGS_READ_WRITE) { |
| 355 | deve->lun_flags &= ~TRANSPORT_LUNFLAGS_READ_ONLY; |
| 356 | deve->lun_flags |= TRANSPORT_LUNFLAGS_READ_WRITE; |
| 357 | } else { |
| 358 | deve->lun_flags &= ~TRANSPORT_LUNFLAGS_READ_WRITE; |
| 359 | deve->lun_flags |= TRANSPORT_LUNFLAGS_READ_ONLY; |
| 360 | } |
| 361 | |
| 362 | deve->creation_time = get_jiffies_64(); |
| 363 | deve->attach_count++; |
| 364 | spin_unlock_irq(&nacl->device_list_lock); |
| 365 | |
| 366 | spin_lock_bh(&port->sep_alua_lock); |
| 367 | list_add_tail(&deve->alua_port_list, &port->sep_alua_list); |
| 368 | spin_unlock_bh(&port->sep_alua_lock); |
| 369 | |
| 370 | return 0; |
| 371 | } |
| 372 | |
| 373 | /* core_disable_device_list_for_node(): |
| 374 | * |
| 375 | * |
| 376 | */ |
| 377 | int core_disable_device_list_for_node( |
| 378 | struct se_lun *lun, |
| 379 | struct se_lun_acl *lun_acl, |
| 380 | u32 mapped_lun, |
| 381 | u32 lun_access, |
| 382 | struct se_node_acl *nacl, |
| 383 | struct se_portal_group *tpg) |
| 384 | { |
| 385 | struct se_port *port = lun->lun_sep; |
| 386 | struct se_dev_entry *deve = nacl->device_list[mapped_lun]; |
| 387 | |
| 388 | /* |
| 389 | * If the MappedLUN entry is being disabled, the entry in |
| 390 | * port->sep_alua_list must be removed now before clearing the |
| 391 | * struct se_dev_entry pointers below as logic in |
| 392 | * core_alua_do_transition_tg_pt() depends on these being present. |
| 393 | * |
| 394 | * deve->se_lun_acl will be NULL for demo-mode created LUNs |
| 395 | * that have not been explicitly converted to MappedLUNs -> |
| 396 | * struct se_lun_acl, but we remove deve->alua_port_list from |
| 397 | * port->sep_alua_list. This also means that active UAs and |
| 398 | * NodeACL context specific PR metadata for demo-mode |
| 399 | * MappedLUN *deve will be released below.. |
| 400 | */ |
| 401 | spin_lock_bh(&port->sep_alua_lock); |
| 402 | list_del(&deve->alua_port_list); |
| 403 | spin_unlock_bh(&port->sep_alua_lock); |
| 404 | /* |
| 405 | * Wait for any in process SPEC_I_PT=1 or REGISTER_AND_MOVE |
| 406 | * PR operation to complete. |
| 407 | */ |
| 408 | while (atomic_read(&deve->pr_ref_count) != 0) |
| 409 | cpu_relax(); |
| 410 | |
| 411 | spin_lock_irq(&nacl->device_list_lock); |
| 412 | /* |
| 413 | * Disable struct se_dev_entry LUN ACL mapping |
| 414 | */ |
| 415 | core_scsi3_ua_release_all(deve); |
| 416 | deve->se_lun = NULL; |
| 417 | deve->se_lun_acl = NULL; |
| 418 | deve->lun_flags = 0; |
| 419 | deve->creation_time = 0; |
| 420 | deve->attach_count--; |
| 421 | spin_unlock_irq(&nacl->device_list_lock); |
| 422 | |
| 423 | core_scsi3_free_pr_reg_from_nacl(lun->lun_se_dev, nacl); |
| 424 | return 0; |
| 425 | } |
| 426 | |
| 427 | /* core_clear_lun_from_tpg(): |
| 428 | * |
| 429 | * |
| 430 | */ |
| 431 | void core_clear_lun_from_tpg(struct se_lun *lun, struct se_portal_group *tpg) |
| 432 | { |
| 433 | struct se_node_acl *nacl; |
| 434 | struct se_dev_entry *deve; |
| 435 | u32 i; |
| 436 | |
| 437 | spin_lock_irq(&tpg->acl_node_lock); |
| 438 | list_for_each_entry(nacl, &tpg->acl_node_list, acl_list) { |
| 439 | spin_unlock_irq(&tpg->acl_node_lock); |
| 440 | |
| 441 | spin_lock_irq(&nacl->device_list_lock); |
| 442 | for (i = 0; i < TRANSPORT_MAX_LUNS_PER_TPG; i++) { |
| 443 | deve = nacl->device_list[i]; |
| 444 | if (lun != deve->se_lun) |
| 445 | continue; |
| 446 | spin_unlock_irq(&nacl->device_list_lock); |
| 447 | |
| 448 | core_disable_device_list_for_node(lun, NULL, |
| 449 | deve->mapped_lun, TRANSPORT_LUNFLAGS_NO_ACCESS, |
| 450 | nacl, tpg); |
| 451 | |
| 452 | spin_lock_irq(&nacl->device_list_lock); |
| 453 | } |
| 454 | spin_unlock_irq(&nacl->device_list_lock); |
| 455 | |
| 456 | spin_lock_irq(&tpg->acl_node_lock); |
| 457 | } |
| 458 | spin_unlock_irq(&tpg->acl_node_lock); |
| 459 | } |
| 460 | |
| 461 | static struct se_port *core_alloc_port(struct se_device *dev) |
| 462 | { |
| 463 | struct se_port *port, *port_tmp; |
| 464 | |
| 465 | port = kzalloc(sizeof(struct se_port), GFP_KERNEL); |
| 466 | if (!port) { |
| 467 | pr_err("Unable to allocate struct se_port\n"); |
| 468 | return ERR_PTR(-ENOMEM); |
| 469 | } |
| 470 | INIT_LIST_HEAD(&port->sep_alua_list); |
| 471 | INIT_LIST_HEAD(&port->sep_list); |
| 472 | atomic_set(&port->sep_tg_pt_secondary_offline, 0); |
| 473 | spin_lock_init(&port->sep_alua_lock); |
| 474 | mutex_init(&port->sep_tg_pt_md_mutex); |
| 475 | |
| 476 | spin_lock(&dev->se_port_lock); |
| 477 | if (dev->dev_port_count == 0x0000ffff) { |
| 478 | pr_warn("Reached dev->dev_port_count ==" |
| 479 | " 0x0000ffff\n"); |
| 480 | spin_unlock(&dev->se_port_lock); |
| 481 | return ERR_PTR(-ENOSPC); |
| 482 | } |
| 483 | again: |
| 484 | /* |
| 485 | * Allocate the next RELATIVE TARGET PORT IDENTIFIER for this struct se_device |
| 486 | * Here is the table from spc4r17 section 7.7.3.8. |
| 487 | * |
| 488 | * Table 473 -- RELATIVE TARGET PORT IDENTIFIER field |
| 489 | * |
| 490 | * Code Description |
| 491 | * 0h Reserved |
| 492 | * 1h Relative port 1, historically known as port A |
| 493 | * 2h Relative port 2, historically known as port B |
| 494 | * 3h to FFFFh Relative port 3 through 65 535 |
| 495 | */ |
| 496 | port->sep_rtpi = dev->dev_rpti_counter++; |
| 497 | if (!port->sep_rtpi) |
| 498 | goto again; |
| 499 | |
| 500 | list_for_each_entry(port_tmp, &dev->dev_sep_list, sep_list) { |
| 501 | /* |
| 502 | * Make sure RELATIVE TARGET PORT IDENTIFIER is unique |
| 503 | * for 16-bit wrap.. |
| 504 | */ |
| 505 | if (port->sep_rtpi == port_tmp->sep_rtpi) |
| 506 | goto again; |
| 507 | } |
| 508 | spin_unlock(&dev->se_port_lock); |
| 509 | |
| 510 | return port; |
| 511 | } |
| 512 | |
| 513 | static void core_export_port( |
| 514 | struct se_device *dev, |
| 515 | struct se_portal_group *tpg, |
| 516 | struct se_port *port, |
| 517 | struct se_lun *lun) |
| 518 | { |
| 519 | struct t10_alua_tg_pt_gp_member *tg_pt_gp_mem = NULL; |
| 520 | |
| 521 | spin_lock(&dev->se_port_lock); |
| 522 | spin_lock(&lun->lun_sep_lock); |
| 523 | port->sep_tpg = tpg; |
| 524 | port->sep_lun = lun; |
| 525 | lun->lun_sep = port; |
| 526 | spin_unlock(&lun->lun_sep_lock); |
| 527 | |
| 528 | list_add_tail(&port->sep_list, &dev->dev_sep_list); |
| 529 | spin_unlock(&dev->se_port_lock); |
| 530 | |
| 531 | if (dev->transport->transport_type != TRANSPORT_PLUGIN_PHBA_PDEV && |
| 532 | !(dev->se_hba->hba_flags & HBA_FLAGS_INTERNAL_USE)) { |
| 533 | tg_pt_gp_mem = core_alua_allocate_tg_pt_gp_mem(port); |
| 534 | if (IS_ERR(tg_pt_gp_mem) || !tg_pt_gp_mem) { |
| 535 | pr_err("Unable to allocate t10_alua_tg_pt" |
| 536 | "_gp_member_t\n"); |
| 537 | return; |
| 538 | } |
| 539 | spin_lock(&tg_pt_gp_mem->tg_pt_gp_mem_lock); |
| 540 | __core_alua_attach_tg_pt_gp_mem(tg_pt_gp_mem, |
| 541 | dev->t10_alua.default_tg_pt_gp); |
| 542 | spin_unlock(&tg_pt_gp_mem->tg_pt_gp_mem_lock); |
| 543 | pr_debug("%s/%s: Adding to default ALUA Target Port" |
| 544 | " Group: alua/default_tg_pt_gp\n", |
| 545 | dev->transport->name, tpg->se_tpg_tfo->get_fabric_name()); |
| 546 | } |
| 547 | |
| 548 | dev->dev_port_count++; |
| 549 | port->sep_index = port->sep_rtpi; /* RELATIVE TARGET PORT IDENTIFIER */ |
| 550 | } |
| 551 | |
| 552 | /* |
| 553 | * Called with struct se_device->se_port_lock spinlock held. |
| 554 | */ |
| 555 | static void core_release_port(struct se_device *dev, struct se_port *port) |
| 556 | __releases(&dev->se_port_lock) __acquires(&dev->se_port_lock) |
| 557 | { |
| 558 | /* |
| 559 | * Wait for any port reference for PR ALL_TG_PT=1 operation |
| 560 | * to complete in __core_scsi3_alloc_registration() |
| 561 | */ |
| 562 | spin_unlock(&dev->se_port_lock); |
| 563 | if (atomic_read(&port->sep_tg_pt_ref_cnt)) |
| 564 | cpu_relax(); |
| 565 | spin_lock(&dev->se_port_lock); |
| 566 | |
| 567 | core_alua_free_tg_pt_gp_mem(port); |
| 568 | |
| 569 | list_del(&port->sep_list); |
| 570 | dev->dev_port_count--; |
| 571 | kfree(port); |
| 572 | } |
| 573 | |
| 574 | int core_dev_export( |
| 575 | struct se_device *dev, |
| 576 | struct se_portal_group *tpg, |
| 577 | struct se_lun *lun) |
| 578 | { |
| 579 | struct se_hba *hba = dev->se_hba; |
| 580 | struct se_port *port; |
| 581 | |
| 582 | port = core_alloc_port(dev); |
| 583 | if (IS_ERR(port)) |
| 584 | return PTR_ERR(port); |
| 585 | |
| 586 | lun->lun_se_dev = dev; |
| 587 | |
| 588 | spin_lock(&hba->device_lock); |
| 589 | dev->export_count++; |
| 590 | spin_unlock(&hba->device_lock); |
| 591 | |
| 592 | core_export_port(dev, tpg, port, lun); |
| 593 | return 0; |
| 594 | } |
| 595 | |
| 596 | void core_dev_unexport( |
| 597 | struct se_device *dev, |
| 598 | struct se_portal_group *tpg, |
| 599 | struct se_lun *lun) |
| 600 | { |
| 601 | struct se_hba *hba = dev->se_hba; |
| 602 | struct se_port *port = lun->lun_sep; |
| 603 | |
| 604 | spin_lock(&lun->lun_sep_lock); |
| 605 | if (lun->lun_se_dev == NULL) { |
| 606 | spin_unlock(&lun->lun_sep_lock); |
| 607 | return; |
| 608 | } |
| 609 | spin_unlock(&lun->lun_sep_lock); |
| 610 | |
| 611 | spin_lock(&dev->se_port_lock); |
| 612 | core_release_port(dev, port); |
| 613 | spin_unlock(&dev->se_port_lock); |
| 614 | |
| 615 | spin_lock(&hba->device_lock); |
| 616 | dev->export_count--; |
| 617 | spin_unlock(&hba->device_lock); |
| 618 | |
| 619 | lun->lun_se_dev = NULL; |
| 620 | } |
| 621 | |
| 622 | static void se_release_vpd_for_dev(struct se_device *dev) |
| 623 | { |
| 624 | struct t10_vpd *vpd, *vpd_tmp; |
| 625 | |
| 626 | spin_lock(&dev->t10_wwn.t10_vpd_lock); |
| 627 | list_for_each_entry_safe(vpd, vpd_tmp, |
| 628 | &dev->t10_wwn.t10_vpd_list, vpd_list) { |
| 629 | list_del(&vpd->vpd_list); |
| 630 | kfree(vpd); |
| 631 | } |
| 632 | spin_unlock(&dev->t10_wwn.t10_vpd_lock); |
| 633 | } |
| 634 | |
| 635 | static u32 se_dev_align_max_sectors(u32 max_sectors, u32 block_size) |
| 636 | { |
| 637 | u32 aligned_max_sectors; |
| 638 | u32 alignment; |
| 639 | /* |
| 640 | * Limit max_sectors to a PAGE_SIZE aligned value for modern |
| 641 | * transport_allocate_data_tasks() operation. |
| 642 | */ |
| 643 | alignment = max(1ul, PAGE_SIZE / block_size); |
| 644 | aligned_max_sectors = rounddown(max_sectors, alignment); |
| 645 | |
| 646 | if (max_sectors != aligned_max_sectors) |
| 647 | pr_info("Rounding down aligned max_sectors from %u to %u\n", |
| 648 | max_sectors, aligned_max_sectors); |
| 649 | |
| 650 | return aligned_max_sectors; |
| 651 | } |
| 652 | |
| 653 | int se_dev_set_max_unmap_lba_count( |
| 654 | struct se_device *dev, |
| 655 | u32 max_unmap_lba_count) |
| 656 | { |
| 657 | dev->dev_attrib.max_unmap_lba_count = max_unmap_lba_count; |
| 658 | pr_debug("dev[%p]: Set max_unmap_lba_count: %u\n", |
| 659 | dev, dev->dev_attrib.max_unmap_lba_count); |
| 660 | return 0; |
| 661 | } |
| 662 | |
| 663 | int se_dev_set_max_unmap_block_desc_count( |
| 664 | struct se_device *dev, |
| 665 | u32 max_unmap_block_desc_count) |
| 666 | { |
| 667 | dev->dev_attrib.max_unmap_block_desc_count = |
| 668 | max_unmap_block_desc_count; |
| 669 | pr_debug("dev[%p]: Set max_unmap_block_desc_count: %u\n", |
| 670 | dev, dev->dev_attrib.max_unmap_block_desc_count); |
| 671 | return 0; |
| 672 | } |
| 673 | |
| 674 | int se_dev_set_unmap_granularity( |
| 675 | struct se_device *dev, |
| 676 | u32 unmap_granularity) |
| 677 | { |
| 678 | dev->dev_attrib.unmap_granularity = unmap_granularity; |
| 679 | pr_debug("dev[%p]: Set unmap_granularity: %u\n", |
| 680 | dev, dev->dev_attrib.unmap_granularity); |
| 681 | return 0; |
| 682 | } |
| 683 | |
| 684 | int se_dev_set_unmap_granularity_alignment( |
| 685 | struct se_device *dev, |
| 686 | u32 unmap_granularity_alignment) |
| 687 | { |
| 688 | dev->dev_attrib.unmap_granularity_alignment = unmap_granularity_alignment; |
| 689 | pr_debug("dev[%p]: Set unmap_granularity_alignment: %u\n", |
| 690 | dev, dev->dev_attrib.unmap_granularity_alignment); |
| 691 | return 0; |
| 692 | } |
| 693 | |
| 694 | int se_dev_set_max_write_same_len( |
| 695 | struct se_device *dev, |
| 696 | u32 max_write_same_len) |
| 697 | { |
| 698 | dev->dev_attrib.max_write_same_len = max_write_same_len; |
| 699 | pr_debug("dev[%p]: Set max_write_same_len: %u\n", |
| 700 | dev, dev->dev_attrib.max_write_same_len); |
| 701 | return 0; |
| 702 | } |
| 703 | |
| 704 | static void dev_set_t10_wwn_model_alias(struct se_device *dev) |
| 705 | { |
| 706 | const char *configname; |
| 707 | |
| 708 | configname = config_item_name(&dev->dev_group.cg_item); |
| 709 | if (strlen(configname) >= 16) { |
| 710 | pr_warn("dev[%p]: Backstore name '%s' is too long for " |
| 711 | "INQUIRY_MODEL, truncating to 16 bytes\n", dev, |
| 712 | configname); |
| 713 | } |
| 714 | snprintf(&dev->t10_wwn.model[0], 16, "%s", configname); |
| 715 | } |
| 716 | |
| 717 | int se_dev_set_emulate_model_alias(struct se_device *dev, int flag) |
| 718 | { |
| 719 | if (dev->export_count) { |
| 720 | pr_err("dev[%p]: Unable to change model alias" |
| 721 | " while export_count is %d\n", |
| 722 | dev, dev->export_count); |
| 723 | return -EINVAL; |
| 724 | } |
| 725 | |
| 726 | if (flag != 0 && flag != 1) { |
| 727 | pr_err("Illegal value %d\n", flag); |
| 728 | return -EINVAL; |
| 729 | } |
| 730 | |
| 731 | if (flag) { |
| 732 | dev_set_t10_wwn_model_alias(dev); |
| 733 | } else { |
| 734 | strncpy(&dev->t10_wwn.model[0], |
| 735 | dev->transport->inquiry_prod, 16); |
| 736 | } |
| 737 | dev->dev_attrib.emulate_model_alias = flag; |
| 738 | |
| 739 | return 0; |
| 740 | } |
| 741 | |
| 742 | int se_dev_set_emulate_dpo(struct se_device *dev, int flag) |
| 743 | { |
| 744 | if (flag != 0 && flag != 1) { |
| 745 | pr_err("Illegal value %d\n", flag); |
| 746 | return -EINVAL; |
| 747 | } |
| 748 | |
| 749 | if (flag) { |
| 750 | pr_err("dpo_emulated not supported\n"); |
| 751 | return -EINVAL; |
| 752 | } |
| 753 | |
| 754 | return 0; |
| 755 | } |
| 756 | |
| 757 | int se_dev_set_emulate_fua_write(struct se_device *dev, int flag) |
| 758 | { |
| 759 | if (flag != 0 && flag != 1) { |
| 760 | pr_err("Illegal value %d\n", flag); |
| 761 | return -EINVAL; |
| 762 | } |
| 763 | |
| 764 | if (flag && |
| 765 | dev->transport->transport_type == TRANSPORT_PLUGIN_PHBA_PDEV) { |
| 766 | pr_err("emulate_fua_write not supported for pSCSI\n"); |
| 767 | return -EINVAL; |
| 768 | } |
| 769 | dev->dev_attrib.emulate_fua_write = flag; |
| 770 | pr_debug("dev[%p]: SE Device Forced Unit Access WRITEs: %d\n", |
| 771 | dev, dev->dev_attrib.emulate_fua_write); |
| 772 | return 0; |
| 773 | } |
| 774 | |
| 775 | int se_dev_set_emulate_fua_read(struct se_device *dev, int flag) |
| 776 | { |
| 777 | if (flag != 0 && flag != 1) { |
| 778 | pr_err("Illegal value %d\n", flag); |
| 779 | return -EINVAL; |
| 780 | } |
| 781 | |
| 782 | if (flag) { |
| 783 | pr_err("ua read emulated not supported\n"); |
| 784 | return -EINVAL; |
| 785 | } |
| 786 | |
| 787 | return 0; |
| 788 | } |
| 789 | |
| 790 | int se_dev_set_emulate_write_cache(struct se_device *dev, int flag) |
| 791 | { |
| 792 | if (flag != 0 && flag != 1) { |
| 793 | pr_err("Illegal value %d\n", flag); |
| 794 | return -EINVAL; |
| 795 | } |
| 796 | if (flag && |
| 797 | dev->transport->transport_type == TRANSPORT_PLUGIN_PHBA_PDEV) { |
| 798 | pr_err("emulate_write_cache not supported for pSCSI\n"); |
| 799 | return -EINVAL; |
| 800 | } |
| 801 | if (dev->transport->get_write_cache) { |
| 802 | pr_warn("emulate_write_cache cannot be changed when underlying" |
| 803 | " HW reports WriteCacheEnabled, ignoring request\n"); |
| 804 | return 0; |
| 805 | } |
| 806 | |
| 807 | dev->dev_attrib.emulate_write_cache = flag; |
| 808 | pr_debug("dev[%p]: SE Device WRITE_CACHE_EMULATION flag: %d\n", |
| 809 | dev, dev->dev_attrib.emulate_write_cache); |
| 810 | return 0; |
| 811 | } |
| 812 | |
| 813 | int se_dev_set_emulate_ua_intlck_ctrl(struct se_device *dev, int flag) |
| 814 | { |
| 815 | if ((flag != 0) && (flag != 1) && (flag != 2)) { |
| 816 | pr_err("Illegal value %d\n", flag); |
| 817 | return -EINVAL; |
| 818 | } |
| 819 | |
| 820 | if (dev->export_count) { |
| 821 | pr_err("dev[%p]: Unable to change SE Device" |
| 822 | " UA_INTRLCK_CTRL while export_count is %d\n", |
| 823 | dev, dev->export_count); |
| 824 | return -EINVAL; |
| 825 | } |
| 826 | dev->dev_attrib.emulate_ua_intlck_ctrl = flag; |
| 827 | pr_debug("dev[%p]: SE Device UA_INTRLCK_CTRL flag: %d\n", |
| 828 | dev, dev->dev_attrib.emulate_ua_intlck_ctrl); |
| 829 | |
| 830 | return 0; |
| 831 | } |
| 832 | |
| 833 | int se_dev_set_emulate_tas(struct se_device *dev, int flag) |
| 834 | { |
| 835 | if ((flag != 0) && (flag != 1)) { |
| 836 | pr_err("Illegal value %d\n", flag); |
| 837 | return -EINVAL; |
| 838 | } |
| 839 | |
| 840 | if (dev->export_count) { |
| 841 | pr_err("dev[%p]: Unable to change SE Device TAS while" |
| 842 | " export_count is %d\n", |
| 843 | dev, dev->export_count); |
| 844 | return -EINVAL; |
| 845 | } |
| 846 | dev->dev_attrib.emulate_tas = flag; |
| 847 | pr_debug("dev[%p]: SE Device TASK_ABORTED status bit: %s\n", |
| 848 | dev, (dev->dev_attrib.emulate_tas) ? "Enabled" : "Disabled"); |
| 849 | |
| 850 | return 0; |
| 851 | } |
| 852 | |
| 853 | int se_dev_set_emulate_tpu(struct se_device *dev, int flag) |
| 854 | { |
| 855 | if ((flag != 0) && (flag != 1)) { |
| 856 | pr_err("Illegal value %d\n", flag); |
| 857 | return -EINVAL; |
| 858 | } |
| 859 | /* |
| 860 | * We expect this value to be non-zero when generic Block Layer |
| 861 | * Discard supported is detected iblock_create_virtdevice(). |
| 862 | */ |
| 863 | if (flag && !dev->dev_attrib.max_unmap_block_desc_count) { |
| 864 | pr_err("Generic Block Discard not supported\n"); |
| 865 | return -ENOSYS; |
| 866 | } |
| 867 | |
| 868 | dev->dev_attrib.emulate_tpu = flag; |
| 869 | pr_debug("dev[%p]: SE Device Thin Provisioning UNMAP bit: %d\n", |
| 870 | dev, flag); |
| 871 | return 0; |
| 872 | } |
| 873 | |
| 874 | int se_dev_set_emulate_tpws(struct se_device *dev, int flag) |
| 875 | { |
| 876 | if ((flag != 0) && (flag != 1)) { |
| 877 | pr_err("Illegal value %d\n", flag); |
| 878 | return -EINVAL; |
| 879 | } |
| 880 | /* |
| 881 | * We expect this value to be non-zero when generic Block Layer |
| 882 | * Discard supported is detected iblock_create_virtdevice(). |
| 883 | */ |
| 884 | if (flag && !dev->dev_attrib.max_unmap_block_desc_count) { |
| 885 | pr_err("Generic Block Discard not supported\n"); |
| 886 | return -ENOSYS; |
| 887 | } |
| 888 | |
| 889 | dev->dev_attrib.emulate_tpws = flag; |
| 890 | pr_debug("dev[%p]: SE Device Thin Provisioning WRITE_SAME: %d\n", |
| 891 | dev, flag); |
| 892 | return 0; |
| 893 | } |
| 894 | |
| 895 | int se_dev_set_emulate_caw(struct se_device *dev, int flag) |
| 896 | { |
| 897 | if (flag != 0 && flag != 1) { |
| 898 | pr_err("Illegal value %d\n", flag); |
| 899 | return -EINVAL; |
| 900 | } |
| 901 | dev->dev_attrib.emulate_caw = flag; |
| 902 | pr_debug("dev[%p]: SE Device CompareAndWrite (AtomicTestandSet): %d\n", |
| 903 | dev, flag); |
| 904 | |
| 905 | return 0; |
| 906 | } |
| 907 | |
| 908 | int se_dev_set_emulate_3pc(struct se_device *dev, int flag) |
| 909 | { |
| 910 | if (flag != 0 && flag != 1) { |
| 911 | pr_err("Illegal value %d\n", flag); |
| 912 | return -EINVAL; |
| 913 | } |
| 914 | dev->dev_attrib.emulate_3pc = flag; |
| 915 | pr_debug("dev[%p]: SE Device 3rd Party Copy (EXTENDED_COPY): %d\n", |
| 916 | dev, flag); |
| 917 | |
| 918 | return 0; |
| 919 | } |
| 920 | |
| 921 | int se_dev_set_enforce_pr_isids(struct se_device *dev, int flag) |
| 922 | { |
| 923 | if ((flag != 0) && (flag != 1)) { |
| 924 | pr_err("Illegal value %d\n", flag); |
| 925 | return -EINVAL; |
| 926 | } |
| 927 | dev->dev_attrib.enforce_pr_isids = flag; |
| 928 | pr_debug("dev[%p]: SE Device enforce_pr_isids bit: %s\n", dev, |
| 929 | (dev->dev_attrib.enforce_pr_isids) ? "Enabled" : "Disabled"); |
| 930 | return 0; |
| 931 | } |
| 932 | |
| 933 | int se_dev_set_is_nonrot(struct se_device *dev, int flag) |
| 934 | { |
| 935 | if ((flag != 0) && (flag != 1)) { |
| 936 | printk(KERN_ERR "Illegal value %d\n", flag); |
| 937 | return -EINVAL; |
| 938 | } |
| 939 | dev->dev_attrib.is_nonrot = flag; |
| 940 | pr_debug("dev[%p]: SE Device is_nonrot bit: %d\n", |
| 941 | dev, flag); |
| 942 | return 0; |
| 943 | } |
| 944 | |
| 945 | int se_dev_set_emulate_rest_reord(struct se_device *dev, int flag) |
| 946 | { |
| 947 | if (flag != 0) { |
| 948 | printk(KERN_ERR "dev[%p]: SE Device emulatation of restricted" |
| 949 | " reordering not implemented\n", dev); |
| 950 | return -ENOSYS; |
| 951 | } |
| 952 | dev->dev_attrib.emulate_rest_reord = flag; |
| 953 | pr_debug("dev[%p]: SE Device emulate_rest_reord: %d\n", dev, flag); |
| 954 | return 0; |
| 955 | } |
| 956 | |
| 957 | /* |
| 958 | * Note, this can only be called on unexported SE Device Object. |
| 959 | */ |
| 960 | int se_dev_set_queue_depth(struct se_device *dev, u32 queue_depth) |
| 961 | { |
| 962 | if (dev->export_count) { |
| 963 | pr_err("dev[%p]: Unable to change SE Device TCQ while" |
| 964 | " export_count is %d\n", |
| 965 | dev, dev->export_count); |
| 966 | return -EINVAL; |
| 967 | } |
| 968 | if (!queue_depth) { |
| 969 | pr_err("dev[%p]: Illegal ZERO value for queue" |
| 970 | "_depth\n", dev); |
| 971 | return -EINVAL; |
| 972 | } |
| 973 | |
| 974 | if (dev->transport->transport_type == TRANSPORT_PLUGIN_PHBA_PDEV) { |
| 975 | if (queue_depth > dev->dev_attrib.hw_queue_depth) { |
| 976 | pr_err("dev[%p]: Passed queue_depth: %u" |
| 977 | " exceeds TCM/SE_Device TCQ: %u\n", |
| 978 | dev, queue_depth, |
| 979 | dev->dev_attrib.hw_queue_depth); |
| 980 | return -EINVAL; |
| 981 | } |
| 982 | } else { |
| 983 | if (queue_depth > dev->dev_attrib.queue_depth) { |
| 984 | if (queue_depth > dev->dev_attrib.hw_queue_depth) { |
| 985 | pr_err("dev[%p]: Passed queue_depth:" |
| 986 | " %u exceeds TCM/SE_Device MAX" |
| 987 | " TCQ: %u\n", dev, queue_depth, |
| 988 | dev->dev_attrib.hw_queue_depth); |
| 989 | return -EINVAL; |
| 990 | } |
| 991 | } |
| 992 | } |
| 993 | |
| 994 | dev->dev_attrib.queue_depth = dev->queue_depth = queue_depth; |
| 995 | pr_debug("dev[%p]: SE Device TCQ Depth changed to: %u\n", |
| 996 | dev, queue_depth); |
| 997 | return 0; |
| 998 | } |
| 999 | |
| 1000 | int se_dev_set_fabric_max_sectors(struct se_device *dev, u32 fabric_max_sectors) |
| 1001 | { |
| 1002 | int block_size = dev->dev_attrib.block_size; |
| 1003 | |
| 1004 | if (dev->export_count) { |
| 1005 | pr_err("dev[%p]: Unable to change SE Device" |
| 1006 | " fabric_max_sectors while export_count is %d\n", |
| 1007 | dev, dev->export_count); |
| 1008 | return -EINVAL; |
| 1009 | } |
| 1010 | if (!fabric_max_sectors) { |
| 1011 | pr_err("dev[%p]: Illegal ZERO value for" |
| 1012 | " fabric_max_sectors\n", dev); |
| 1013 | return -EINVAL; |
| 1014 | } |
| 1015 | if (fabric_max_sectors < DA_STATUS_MAX_SECTORS_MIN) { |
| 1016 | pr_err("dev[%p]: Passed fabric_max_sectors: %u less than" |
| 1017 | " DA_STATUS_MAX_SECTORS_MIN: %u\n", dev, fabric_max_sectors, |
| 1018 | DA_STATUS_MAX_SECTORS_MIN); |
| 1019 | return -EINVAL; |
| 1020 | } |
| 1021 | if (dev->transport->transport_type == TRANSPORT_PLUGIN_PHBA_PDEV) { |
| 1022 | if (fabric_max_sectors > dev->dev_attrib.hw_max_sectors) { |
| 1023 | pr_err("dev[%p]: Passed fabric_max_sectors: %u" |
| 1024 | " greater than TCM/SE_Device max_sectors:" |
| 1025 | " %u\n", dev, fabric_max_sectors, |
| 1026 | dev->dev_attrib.hw_max_sectors); |
| 1027 | return -EINVAL; |
| 1028 | } |
| 1029 | } else { |
| 1030 | if (fabric_max_sectors > DA_STATUS_MAX_SECTORS_MAX) { |
| 1031 | pr_err("dev[%p]: Passed fabric_max_sectors: %u" |
| 1032 | " greater than DA_STATUS_MAX_SECTORS_MAX:" |
| 1033 | " %u\n", dev, fabric_max_sectors, |
| 1034 | DA_STATUS_MAX_SECTORS_MAX); |
| 1035 | return -EINVAL; |
| 1036 | } |
| 1037 | } |
| 1038 | /* |
| 1039 | * Align max_sectors down to PAGE_SIZE to follow transport_allocate_data_tasks() |
| 1040 | */ |
| 1041 | if (!block_size) { |
| 1042 | block_size = 512; |
| 1043 | pr_warn("Defaulting to 512 for zero block_size\n"); |
| 1044 | } |
| 1045 | fabric_max_sectors = se_dev_align_max_sectors(fabric_max_sectors, |
| 1046 | block_size); |
| 1047 | |
| 1048 | dev->dev_attrib.fabric_max_sectors = fabric_max_sectors; |
| 1049 | pr_debug("dev[%p]: SE Device max_sectors changed to %u\n", |
| 1050 | dev, fabric_max_sectors); |
| 1051 | return 0; |
| 1052 | } |
| 1053 | |
| 1054 | int se_dev_set_optimal_sectors(struct se_device *dev, u32 optimal_sectors) |
| 1055 | { |
| 1056 | if (dev->export_count) { |
| 1057 | pr_err("dev[%p]: Unable to change SE Device" |
| 1058 | " optimal_sectors while export_count is %d\n", |
| 1059 | dev, dev->export_count); |
| 1060 | return -EINVAL; |
| 1061 | } |
| 1062 | if (dev->transport->transport_type == TRANSPORT_PLUGIN_PHBA_PDEV) { |
| 1063 | pr_err("dev[%p]: Passed optimal_sectors cannot be" |
| 1064 | " changed for TCM/pSCSI\n", dev); |
| 1065 | return -EINVAL; |
| 1066 | } |
| 1067 | if (optimal_sectors > dev->dev_attrib.fabric_max_sectors) { |
| 1068 | pr_err("dev[%p]: Passed optimal_sectors %u cannot be" |
| 1069 | " greater than fabric_max_sectors: %u\n", dev, |
| 1070 | optimal_sectors, dev->dev_attrib.fabric_max_sectors); |
| 1071 | return -EINVAL; |
| 1072 | } |
| 1073 | |
| 1074 | dev->dev_attrib.optimal_sectors = optimal_sectors; |
| 1075 | pr_debug("dev[%p]: SE Device optimal_sectors changed to %u\n", |
| 1076 | dev, optimal_sectors); |
| 1077 | return 0; |
| 1078 | } |
| 1079 | |
| 1080 | int se_dev_set_block_size(struct se_device *dev, u32 block_size) |
| 1081 | { |
| 1082 | if (dev->export_count) { |
| 1083 | pr_err("dev[%p]: Unable to change SE Device block_size" |
| 1084 | " while export_count is %d\n", |
| 1085 | dev, dev->export_count); |
| 1086 | return -EINVAL; |
| 1087 | } |
| 1088 | |
| 1089 | if ((block_size != 512) && |
| 1090 | (block_size != 1024) && |
| 1091 | (block_size != 2048) && |
| 1092 | (block_size != 4096)) { |
| 1093 | pr_err("dev[%p]: Illegal value for block_device: %u" |
| 1094 | " for SE device, must be 512, 1024, 2048 or 4096\n", |
| 1095 | dev, block_size); |
| 1096 | return -EINVAL; |
| 1097 | } |
| 1098 | |
| 1099 | if (dev->transport->transport_type == TRANSPORT_PLUGIN_PHBA_PDEV) { |
| 1100 | pr_err("dev[%p]: Not allowed to change block_size for" |
| 1101 | " Physical Device, use for Linux/SCSI to change" |
| 1102 | " block_size for underlying hardware\n", dev); |
| 1103 | return -EINVAL; |
| 1104 | } |
| 1105 | |
| 1106 | dev->dev_attrib.block_size = block_size; |
| 1107 | pr_debug("dev[%p]: SE Device block_size changed to %u\n", |
| 1108 | dev, block_size); |
| 1109 | |
| 1110 | if (dev->dev_attrib.max_bytes_per_io) |
| 1111 | dev->dev_attrib.hw_max_sectors = |
| 1112 | dev->dev_attrib.max_bytes_per_io / block_size; |
| 1113 | |
| 1114 | return 0; |
| 1115 | } |
| 1116 | |
| 1117 | struct se_lun *core_dev_add_lun( |
| 1118 | struct se_portal_group *tpg, |
| 1119 | struct se_device *dev, |
| 1120 | u32 lun) |
| 1121 | { |
| 1122 | struct se_lun *lun_p; |
| 1123 | int rc; |
| 1124 | |
| 1125 | lun_p = core_tpg_pre_addlun(tpg, lun); |
| 1126 | if (IS_ERR(lun_p)) |
| 1127 | return lun_p; |
| 1128 | |
| 1129 | rc = core_tpg_post_addlun(tpg, lun_p, |
| 1130 | TRANSPORT_LUNFLAGS_READ_WRITE, dev); |
| 1131 | if (rc < 0) |
| 1132 | return ERR_PTR(rc); |
| 1133 | |
| 1134 | pr_debug("%s_TPG[%u]_LUN[%u] - Activated %s Logical Unit from" |
| 1135 | " CORE HBA: %u\n", tpg->se_tpg_tfo->get_fabric_name(), |
| 1136 | tpg->se_tpg_tfo->tpg_get_tag(tpg), lun_p->unpacked_lun, |
| 1137 | tpg->se_tpg_tfo->get_fabric_name(), dev->se_hba->hba_id); |
| 1138 | /* |
| 1139 | * Update LUN maps for dynamically added initiators when |
| 1140 | * generate_node_acl is enabled. |
| 1141 | */ |
| 1142 | if (tpg->se_tpg_tfo->tpg_check_demo_mode(tpg)) { |
| 1143 | struct se_node_acl *acl; |
| 1144 | spin_lock_irq(&tpg->acl_node_lock); |
| 1145 | list_for_each_entry(acl, &tpg->acl_node_list, acl_list) { |
| 1146 | if (acl->dynamic_node_acl && |
| 1147 | (!tpg->se_tpg_tfo->tpg_check_demo_mode_login_only || |
| 1148 | !tpg->se_tpg_tfo->tpg_check_demo_mode_login_only(tpg))) { |
| 1149 | spin_unlock_irq(&tpg->acl_node_lock); |
| 1150 | core_tpg_add_node_to_devs(acl, tpg); |
| 1151 | spin_lock_irq(&tpg->acl_node_lock); |
| 1152 | } |
| 1153 | } |
| 1154 | spin_unlock_irq(&tpg->acl_node_lock); |
| 1155 | } |
| 1156 | |
| 1157 | return lun_p; |
| 1158 | } |
| 1159 | |
| 1160 | /* core_dev_del_lun(): |
| 1161 | * |
| 1162 | * |
| 1163 | */ |
| 1164 | int core_dev_del_lun( |
| 1165 | struct se_portal_group *tpg, |
| 1166 | u32 unpacked_lun) |
| 1167 | { |
| 1168 | struct se_lun *lun; |
| 1169 | |
| 1170 | lun = core_tpg_pre_dellun(tpg, unpacked_lun); |
| 1171 | if (IS_ERR(lun)) |
| 1172 | return PTR_ERR(lun); |
| 1173 | |
| 1174 | core_tpg_post_dellun(tpg, lun); |
| 1175 | |
| 1176 | pr_debug("%s_TPG[%u]_LUN[%u] - Deactivated %s Logical Unit from" |
| 1177 | " device object\n", tpg->se_tpg_tfo->get_fabric_name(), |
| 1178 | tpg->se_tpg_tfo->tpg_get_tag(tpg), unpacked_lun, |
| 1179 | tpg->se_tpg_tfo->get_fabric_name()); |
| 1180 | |
| 1181 | return 0; |
| 1182 | } |
| 1183 | |
| 1184 | struct se_lun *core_get_lun_from_tpg(struct se_portal_group *tpg, u32 unpacked_lun) |
| 1185 | { |
| 1186 | struct se_lun *lun; |
| 1187 | |
| 1188 | spin_lock(&tpg->tpg_lun_lock); |
| 1189 | if (unpacked_lun > (TRANSPORT_MAX_LUNS_PER_TPG-1)) { |
| 1190 | pr_err("%s LUN: %u exceeds TRANSPORT_MAX_LUNS" |
| 1191 | "_PER_TPG-1: %u for Target Portal Group: %hu\n", |
| 1192 | tpg->se_tpg_tfo->get_fabric_name(), unpacked_lun, |
| 1193 | TRANSPORT_MAX_LUNS_PER_TPG-1, |
| 1194 | tpg->se_tpg_tfo->tpg_get_tag(tpg)); |
| 1195 | spin_unlock(&tpg->tpg_lun_lock); |
| 1196 | return NULL; |
| 1197 | } |
| 1198 | lun = tpg->tpg_lun_list[unpacked_lun]; |
| 1199 | |
| 1200 | if (lun->lun_status != TRANSPORT_LUN_STATUS_FREE) { |
| 1201 | pr_err("%s Logical Unit Number: %u is not free on" |
| 1202 | " Target Portal Group: %hu, ignoring request.\n", |
| 1203 | tpg->se_tpg_tfo->get_fabric_name(), unpacked_lun, |
| 1204 | tpg->se_tpg_tfo->tpg_get_tag(tpg)); |
| 1205 | spin_unlock(&tpg->tpg_lun_lock); |
| 1206 | return NULL; |
| 1207 | } |
| 1208 | spin_unlock(&tpg->tpg_lun_lock); |
| 1209 | |
| 1210 | return lun; |
| 1211 | } |
| 1212 | |
| 1213 | /* core_dev_get_lun(): |
| 1214 | * |
| 1215 | * |
| 1216 | */ |
| 1217 | static struct se_lun *core_dev_get_lun(struct se_portal_group *tpg, u32 unpacked_lun) |
| 1218 | { |
| 1219 | struct se_lun *lun; |
| 1220 | |
| 1221 | spin_lock(&tpg->tpg_lun_lock); |
| 1222 | if (unpacked_lun > (TRANSPORT_MAX_LUNS_PER_TPG-1)) { |
| 1223 | pr_err("%s LUN: %u exceeds TRANSPORT_MAX_LUNS_PER" |
| 1224 | "_TPG-1: %u for Target Portal Group: %hu\n", |
| 1225 | tpg->se_tpg_tfo->get_fabric_name(), unpacked_lun, |
| 1226 | TRANSPORT_MAX_LUNS_PER_TPG-1, |
| 1227 | tpg->se_tpg_tfo->tpg_get_tag(tpg)); |
| 1228 | spin_unlock(&tpg->tpg_lun_lock); |
| 1229 | return NULL; |
| 1230 | } |
| 1231 | lun = tpg->tpg_lun_list[unpacked_lun]; |
| 1232 | |
| 1233 | if (lun->lun_status != TRANSPORT_LUN_STATUS_ACTIVE) { |
| 1234 | pr_err("%s Logical Unit Number: %u is not active on" |
| 1235 | " Target Portal Group: %hu, ignoring request.\n", |
| 1236 | tpg->se_tpg_tfo->get_fabric_name(), unpacked_lun, |
| 1237 | tpg->se_tpg_tfo->tpg_get_tag(tpg)); |
| 1238 | spin_unlock(&tpg->tpg_lun_lock); |
| 1239 | return NULL; |
| 1240 | } |
| 1241 | spin_unlock(&tpg->tpg_lun_lock); |
| 1242 | |
| 1243 | return lun; |
| 1244 | } |
| 1245 | |
| 1246 | struct se_lun_acl *core_dev_init_initiator_node_lun_acl( |
| 1247 | struct se_portal_group *tpg, |
| 1248 | struct se_node_acl *nacl, |
| 1249 | u32 mapped_lun, |
| 1250 | int *ret) |
| 1251 | { |
| 1252 | struct se_lun_acl *lacl; |
| 1253 | |
| 1254 | if (strlen(nacl->initiatorname) >= TRANSPORT_IQN_LEN) { |
| 1255 | pr_err("%s InitiatorName exceeds maximum size.\n", |
| 1256 | tpg->se_tpg_tfo->get_fabric_name()); |
| 1257 | *ret = -EOVERFLOW; |
| 1258 | return NULL; |
| 1259 | } |
| 1260 | lacl = kzalloc(sizeof(struct se_lun_acl), GFP_KERNEL); |
| 1261 | if (!lacl) { |
| 1262 | pr_err("Unable to allocate memory for struct se_lun_acl.\n"); |
| 1263 | *ret = -ENOMEM; |
| 1264 | return NULL; |
| 1265 | } |
| 1266 | |
| 1267 | INIT_LIST_HEAD(&lacl->lacl_list); |
| 1268 | lacl->mapped_lun = mapped_lun; |
| 1269 | lacl->se_lun_nacl = nacl; |
| 1270 | snprintf(lacl->initiatorname, TRANSPORT_IQN_LEN, "%s", |
| 1271 | nacl->initiatorname); |
| 1272 | |
| 1273 | return lacl; |
| 1274 | } |
| 1275 | |
| 1276 | int core_dev_add_initiator_node_lun_acl( |
| 1277 | struct se_portal_group *tpg, |
| 1278 | struct se_lun_acl *lacl, |
| 1279 | u32 unpacked_lun, |
| 1280 | u32 lun_access) |
| 1281 | { |
| 1282 | struct se_lun *lun; |
| 1283 | struct se_node_acl *nacl; |
| 1284 | |
| 1285 | lun = core_dev_get_lun(tpg, unpacked_lun); |
| 1286 | if (!lun) { |
| 1287 | pr_err("%s Logical Unit Number: %u is not active on" |
| 1288 | " Target Portal Group: %hu, ignoring request.\n", |
| 1289 | tpg->se_tpg_tfo->get_fabric_name(), unpacked_lun, |
| 1290 | tpg->se_tpg_tfo->tpg_get_tag(tpg)); |
| 1291 | return -EINVAL; |
| 1292 | } |
| 1293 | |
| 1294 | nacl = lacl->se_lun_nacl; |
| 1295 | if (!nacl) |
| 1296 | return -EINVAL; |
| 1297 | |
| 1298 | if ((lun->lun_access & TRANSPORT_LUNFLAGS_READ_ONLY) && |
| 1299 | (lun_access & TRANSPORT_LUNFLAGS_READ_WRITE)) |
| 1300 | lun_access = TRANSPORT_LUNFLAGS_READ_ONLY; |
| 1301 | |
| 1302 | lacl->se_lun = lun; |
| 1303 | |
| 1304 | if (core_enable_device_list_for_node(lun, lacl, lacl->mapped_lun, |
| 1305 | lun_access, nacl, tpg) < 0) |
| 1306 | return -EINVAL; |
| 1307 | |
| 1308 | spin_lock(&lun->lun_acl_lock); |
| 1309 | list_add_tail(&lacl->lacl_list, &lun->lun_acl_list); |
| 1310 | atomic_inc(&lun->lun_acl_count); |
| 1311 | smp_mb__after_atomic_inc(); |
| 1312 | spin_unlock(&lun->lun_acl_lock); |
| 1313 | |
| 1314 | pr_debug("%s_TPG[%hu]_LUN[%u->%u] - Added %s ACL for " |
| 1315 | " InitiatorNode: %s\n", tpg->se_tpg_tfo->get_fabric_name(), |
| 1316 | tpg->se_tpg_tfo->tpg_get_tag(tpg), unpacked_lun, lacl->mapped_lun, |
| 1317 | (lun_access & TRANSPORT_LUNFLAGS_READ_WRITE) ? "RW" : "RO", |
| 1318 | lacl->initiatorname); |
| 1319 | /* |
| 1320 | * Check to see if there are any existing persistent reservation APTPL |
| 1321 | * pre-registrations that need to be enabled for this LUN ACL.. |
| 1322 | */ |
| 1323 | core_scsi3_check_aptpl_registration(lun->lun_se_dev, tpg, lun, lacl); |
| 1324 | return 0; |
| 1325 | } |
| 1326 | |
| 1327 | /* core_dev_del_initiator_node_lun_acl(): |
| 1328 | * |
| 1329 | * |
| 1330 | */ |
| 1331 | int core_dev_del_initiator_node_lun_acl( |
| 1332 | struct se_portal_group *tpg, |
| 1333 | struct se_lun *lun, |
| 1334 | struct se_lun_acl *lacl) |
| 1335 | { |
| 1336 | struct se_node_acl *nacl; |
| 1337 | |
| 1338 | nacl = lacl->se_lun_nacl; |
| 1339 | if (!nacl) |
| 1340 | return -EINVAL; |
| 1341 | |
| 1342 | spin_lock(&lun->lun_acl_lock); |
| 1343 | list_del(&lacl->lacl_list); |
| 1344 | atomic_dec(&lun->lun_acl_count); |
| 1345 | smp_mb__after_atomic_dec(); |
| 1346 | spin_unlock(&lun->lun_acl_lock); |
| 1347 | |
| 1348 | core_disable_device_list_for_node(lun, NULL, lacl->mapped_lun, |
| 1349 | TRANSPORT_LUNFLAGS_NO_ACCESS, nacl, tpg); |
| 1350 | |
| 1351 | lacl->se_lun = NULL; |
| 1352 | |
| 1353 | pr_debug("%s_TPG[%hu]_LUN[%u] - Removed ACL for" |
| 1354 | " InitiatorNode: %s Mapped LUN: %u\n", |
| 1355 | tpg->se_tpg_tfo->get_fabric_name(), |
| 1356 | tpg->se_tpg_tfo->tpg_get_tag(tpg), lun->unpacked_lun, |
| 1357 | lacl->initiatorname, lacl->mapped_lun); |
| 1358 | |
| 1359 | return 0; |
| 1360 | } |
| 1361 | |
| 1362 | void core_dev_free_initiator_node_lun_acl( |
| 1363 | struct se_portal_group *tpg, |
| 1364 | struct se_lun_acl *lacl) |
| 1365 | { |
| 1366 | pr_debug("%s_TPG[%hu] - Freeing ACL for %s InitiatorNode: %s" |
| 1367 | " Mapped LUN: %u\n", tpg->se_tpg_tfo->get_fabric_name(), |
| 1368 | tpg->se_tpg_tfo->tpg_get_tag(tpg), |
| 1369 | tpg->se_tpg_tfo->get_fabric_name(), |
| 1370 | lacl->initiatorname, lacl->mapped_lun); |
| 1371 | |
| 1372 | kfree(lacl); |
| 1373 | } |
| 1374 | |
| 1375 | static void scsi_dump_inquiry(struct se_device *dev) |
| 1376 | { |
| 1377 | struct t10_wwn *wwn = &dev->t10_wwn; |
| 1378 | char buf[17]; |
| 1379 | int i, device_type; |
| 1380 | /* |
| 1381 | * Print Linux/SCSI style INQUIRY formatting to the kernel ring buffer |
| 1382 | */ |
| 1383 | for (i = 0; i < 8; i++) |
| 1384 | if (wwn->vendor[i] >= 0x20) |
| 1385 | buf[i] = wwn->vendor[i]; |
| 1386 | else |
| 1387 | buf[i] = ' '; |
| 1388 | buf[i] = '\0'; |
| 1389 | pr_debug(" Vendor: %s\n", buf); |
| 1390 | |
| 1391 | for (i = 0; i < 16; i++) |
| 1392 | if (wwn->model[i] >= 0x20) |
| 1393 | buf[i] = wwn->model[i]; |
| 1394 | else |
| 1395 | buf[i] = ' '; |
| 1396 | buf[i] = '\0'; |
| 1397 | pr_debug(" Model: %s\n", buf); |
| 1398 | |
| 1399 | for (i = 0; i < 4; i++) |
| 1400 | if (wwn->revision[i] >= 0x20) |
| 1401 | buf[i] = wwn->revision[i]; |
| 1402 | else |
| 1403 | buf[i] = ' '; |
| 1404 | buf[i] = '\0'; |
| 1405 | pr_debug(" Revision: %s\n", buf); |
| 1406 | |
| 1407 | device_type = dev->transport->get_device_type(dev); |
| 1408 | pr_debug(" Type: %s ", scsi_device_type(device_type)); |
| 1409 | } |
| 1410 | |
| 1411 | struct se_device *target_alloc_device(struct se_hba *hba, const char *name) |
| 1412 | { |
| 1413 | struct se_device *dev; |
| 1414 | struct se_lun *xcopy_lun; |
| 1415 | |
| 1416 | dev = hba->transport->alloc_device(hba, name); |
| 1417 | if (!dev) |
| 1418 | return NULL; |
| 1419 | |
| 1420 | dev->dev_link_magic = SE_DEV_LINK_MAGIC; |
| 1421 | dev->se_hba = hba; |
| 1422 | dev->transport = hba->transport; |
| 1423 | |
| 1424 | INIT_LIST_HEAD(&dev->dev_list); |
| 1425 | INIT_LIST_HEAD(&dev->dev_sep_list); |
| 1426 | INIT_LIST_HEAD(&dev->dev_tmr_list); |
| 1427 | INIT_LIST_HEAD(&dev->delayed_cmd_list); |
| 1428 | INIT_LIST_HEAD(&dev->state_list); |
| 1429 | INIT_LIST_HEAD(&dev->qf_cmd_list); |
| 1430 | INIT_LIST_HEAD(&dev->g_dev_node); |
| 1431 | spin_lock_init(&dev->execute_task_lock); |
| 1432 | spin_lock_init(&dev->delayed_cmd_lock); |
| 1433 | spin_lock_init(&dev->dev_reservation_lock); |
| 1434 | spin_lock_init(&dev->se_port_lock); |
| 1435 | spin_lock_init(&dev->se_tmr_lock); |
| 1436 | spin_lock_init(&dev->qf_cmd_lock); |
| 1437 | sema_init(&dev->caw_sem, 1); |
| 1438 | atomic_set(&dev->dev_ordered_id, 0); |
| 1439 | INIT_LIST_HEAD(&dev->t10_wwn.t10_vpd_list); |
| 1440 | spin_lock_init(&dev->t10_wwn.t10_vpd_lock); |
| 1441 | INIT_LIST_HEAD(&dev->t10_pr.registration_list); |
| 1442 | INIT_LIST_HEAD(&dev->t10_pr.aptpl_reg_list); |
| 1443 | spin_lock_init(&dev->t10_pr.registration_lock); |
| 1444 | spin_lock_init(&dev->t10_pr.aptpl_reg_lock); |
| 1445 | INIT_LIST_HEAD(&dev->t10_alua.tg_pt_gps_list); |
| 1446 | spin_lock_init(&dev->t10_alua.tg_pt_gps_lock); |
| 1447 | |
| 1448 | dev->t10_wwn.t10_dev = dev; |
| 1449 | dev->t10_alua.t10_dev = dev; |
| 1450 | |
| 1451 | dev->dev_attrib.da_dev = dev; |
| 1452 | dev->dev_attrib.emulate_model_alias = DA_EMULATE_MODEL_ALIAS; |
| 1453 | dev->dev_attrib.emulate_dpo = DA_EMULATE_DPO; |
| 1454 | dev->dev_attrib.emulate_fua_write = DA_EMULATE_FUA_WRITE; |
| 1455 | dev->dev_attrib.emulate_fua_read = DA_EMULATE_FUA_READ; |
| 1456 | dev->dev_attrib.emulate_write_cache = DA_EMULATE_WRITE_CACHE; |
| 1457 | dev->dev_attrib.emulate_ua_intlck_ctrl = DA_EMULATE_UA_INTLLCK_CTRL; |
| 1458 | dev->dev_attrib.emulate_tas = DA_EMULATE_TAS; |
| 1459 | dev->dev_attrib.emulate_tpu = DA_EMULATE_TPU; |
| 1460 | dev->dev_attrib.emulate_tpws = DA_EMULATE_TPWS; |
| 1461 | dev->dev_attrib.emulate_caw = DA_EMULATE_CAW; |
| 1462 | dev->dev_attrib.emulate_3pc = DA_EMULATE_3PC; |
| 1463 | dev->dev_attrib.enforce_pr_isids = DA_ENFORCE_PR_ISIDS; |
| 1464 | dev->dev_attrib.is_nonrot = DA_IS_NONROT; |
| 1465 | dev->dev_attrib.emulate_rest_reord = DA_EMULATE_REST_REORD; |
| 1466 | dev->dev_attrib.max_unmap_lba_count = DA_MAX_UNMAP_LBA_COUNT; |
| 1467 | dev->dev_attrib.max_unmap_block_desc_count = |
| 1468 | DA_MAX_UNMAP_BLOCK_DESC_COUNT; |
| 1469 | dev->dev_attrib.unmap_granularity = DA_UNMAP_GRANULARITY_DEFAULT; |
| 1470 | dev->dev_attrib.unmap_granularity_alignment = |
| 1471 | DA_UNMAP_GRANULARITY_ALIGNMENT_DEFAULT; |
| 1472 | dev->dev_attrib.max_write_same_len = DA_MAX_WRITE_SAME_LEN; |
| 1473 | dev->dev_attrib.fabric_max_sectors = DA_FABRIC_MAX_SECTORS; |
| 1474 | dev->dev_attrib.optimal_sectors = DA_FABRIC_MAX_SECTORS; |
| 1475 | |
| 1476 | xcopy_lun = &dev->xcopy_lun; |
| 1477 | xcopy_lun->lun_se_dev = dev; |
| 1478 | init_completion(&xcopy_lun->lun_shutdown_comp); |
| 1479 | INIT_LIST_HEAD(&xcopy_lun->lun_acl_list); |
| 1480 | spin_lock_init(&xcopy_lun->lun_acl_lock); |
| 1481 | spin_lock_init(&xcopy_lun->lun_sep_lock); |
| 1482 | init_completion(&xcopy_lun->lun_ref_comp); |
| 1483 | |
| 1484 | return dev; |
| 1485 | } |
| 1486 | |
| 1487 | int target_configure_device(struct se_device *dev) |
| 1488 | { |
| 1489 | struct se_hba *hba = dev->se_hba; |
| 1490 | int ret; |
| 1491 | |
| 1492 | if (dev->dev_flags & DF_CONFIGURED) { |
| 1493 | pr_err("se_dev->se_dev_ptr already set for storage" |
| 1494 | " object\n"); |
| 1495 | return -EEXIST; |
| 1496 | } |
| 1497 | |
| 1498 | ret = dev->transport->configure_device(dev); |
| 1499 | if (ret) |
| 1500 | goto out; |
| 1501 | dev->dev_flags |= DF_CONFIGURED; |
| 1502 | |
| 1503 | /* |
| 1504 | * XXX: there is not much point to have two different values here.. |
| 1505 | */ |
| 1506 | dev->dev_attrib.block_size = dev->dev_attrib.hw_block_size; |
| 1507 | dev->dev_attrib.queue_depth = dev->dev_attrib.hw_queue_depth; |
| 1508 | |
| 1509 | /* |
| 1510 | * Align max_hw_sectors down to PAGE_SIZE I/O transfers |
| 1511 | */ |
| 1512 | dev->dev_attrib.hw_max_sectors = |
| 1513 | se_dev_align_max_sectors(dev->dev_attrib.hw_max_sectors, |
| 1514 | dev->dev_attrib.hw_block_size); |
| 1515 | |
| 1516 | dev->dev_index = scsi_get_new_index(SCSI_DEVICE_INDEX); |
| 1517 | dev->creation_time = get_jiffies_64(); |
| 1518 | |
| 1519 | ret = core_setup_alua(dev); |
| 1520 | if (ret) |
| 1521 | goto out; |
| 1522 | |
| 1523 | /* |
| 1524 | * Startup the struct se_device processing thread |
| 1525 | */ |
| 1526 | dev->tmr_wq = alloc_workqueue("tmr-%s", WQ_MEM_RECLAIM | WQ_UNBOUND, 1, |
| 1527 | dev->transport->name); |
| 1528 | if (!dev->tmr_wq) { |
| 1529 | pr_err("Unable to create tmr workqueue for %s\n", |
| 1530 | dev->transport->name); |
| 1531 | ret = -ENOMEM; |
| 1532 | goto out_free_alua; |
| 1533 | } |
| 1534 | |
| 1535 | /* |
| 1536 | * Setup work_queue for QUEUE_FULL |
| 1537 | */ |
| 1538 | INIT_WORK(&dev->qf_work_queue, target_qf_do_work); |
| 1539 | |
| 1540 | /* |
| 1541 | * Preload the initial INQUIRY const values if we are doing |
| 1542 | * anything virtual (IBLOCK, FILEIO, RAMDISK), but not for TCM/pSCSI |
| 1543 | * passthrough because this is being provided by the backend LLD. |
| 1544 | */ |
| 1545 | if (dev->transport->transport_type != TRANSPORT_PLUGIN_PHBA_PDEV) { |
| 1546 | strncpy(&dev->t10_wwn.vendor[0], "LIO-ORG", 8); |
| 1547 | strncpy(&dev->t10_wwn.model[0], |
| 1548 | dev->transport->inquiry_prod, 16); |
| 1549 | strncpy(&dev->t10_wwn.revision[0], |
| 1550 | dev->transport->inquiry_rev, 4); |
| 1551 | } |
| 1552 | |
| 1553 | scsi_dump_inquiry(dev); |
| 1554 | |
| 1555 | spin_lock(&hba->device_lock); |
| 1556 | hba->dev_count++; |
| 1557 | spin_unlock(&hba->device_lock); |
| 1558 | |
| 1559 | mutex_lock(&g_device_mutex); |
| 1560 | list_add_tail(&dev->g_dev_node, &g_device_list); |
| 1561 | mutex_unlock(&g_device_mutex); |
| 1562 | |
| 1563 | return 0; |
| 1564 | |
| 1565 | out_free_alua: |
| 1566 | core_alua_free_lu_gp_mem(dev); |
| 1567 | out: |
| 1568 | se_release_vpd_for_dev(dev); |
| 1569 | return ret; |
| 1570 | } |
| 1571 | |
| 1572 | void target_free_device(struct se_device *dev) |
| 1573 | { |
| 1574 | struct se_hba *hba = dev->se_hba; |
| 1575 | |
| 1576 | WARN_ON(!list_empty(&dev->dev_sep_list)); |
| 1577 | |
| 1578 | if (dev->dev_flags & DF_CONFIGURED) { |
| 1579 | destroy_workqueue(dev->tmr_wq); |
| 1580 | |
| 1581 | mutex_lock(&g_device_mutex); |
| 1582 | list_del(&dev->g_dev_node); |
| 1583 | mutex_unlock(&g_device_mutex); |
| 1584 | |
| 1585 | spin_lock(&hba->device_lock); |
| 1586 | hba->dev_count--; |
| 1587 | spin_unlock(&hba->device_lock); |
| 1588 | } |
| 1589 | |
| 1590 | core_alua_free_lu_gp_mem(dev); |
| 1591 | core_scsi3_free_all_registrations(dev); |
| 1592 | se_release_vpd_for_dev(dev); |
| 1593 | |
| 1594 | dev->transport->free_device(dev); |
| 1595 | } |
| 1596 | |
| 1597 | int core_dev_setup_virtual_lun0(void) |
| 1598 | { |
| 1599 | struct se_hba *hba; |
| 1600 | struct se_device *dev; |
| 1601 | char buf[] = "rd_pages=8,rd_nullio=1"; |
| 1602 | int ret; |
| 1603 | |
| 1604 | hba = core_alloc_hba("rd_mcp", 0, HBA_FLAGS_INTERNAL_USE); |
| 1605 | if (IS_ERR(hba)) |
| 1606 | return PTR_ERR(hba); |
| 1607 | |
| 1608 | dev = target_alloc_device(hba, "virt_lun0"); |
| 1609 | if (!dev) { |
| 1610 | ret = -ENOMEM; |
| 1611 | goto out_free_hba; |
| 1612 | } |
| 1613 | |
| 1614 | hba->transport->set_configfs_dev_params(dev, buf, sizeof(buf)); |
| 1615 | |
| 1616 | ret = target_configure_device(dev); |
| 1617 | if (ret) |
| 1618 | goto out_free_se_dev; |
| 1619 | |
| 1620 | lun0_hba = hba; |
| 1621 | g_lun0_dev = dev; |
| 1622 | return 0; |
| 1623 | |
| 1624 | out_free_se_dev: |
| 1625 | target_free_device(dev); |
| 1626 | out_free_hba: |
| 1627 | core_delete_hba(hba); |
| 1628 | return ret; |
| 1629 | } |
| 1630 | |
| 1631 | |
| 1632 | void core_dev_release_virtual_lun0(void) |
| 1633 | { |
| 1634 | struct se_hba *hba = lun0_hba; |
| 1635 | |
| 1636 | if (!hba) |
| 1637 | return; |
| 1638 | |
| 1639 | if (g_lun0_dev) |
| 1640 | target_free_device(g_lun0_dev); |
| 1641 | core_delete_hba(hba); |
| 1642 | } |