Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 1 | /******************************************************************************* |
| 2 | * Filename: target_core_device.c (based on iscsi_target_device.c) |
| 3 | * |
| 4 | * This file contains the iSCSI Virtual Device and Disk Transport |
| 5 | * agnostic related functions. |
| 6 | * |
| 7 | * Copyright (c) 2003, 2004, 2005 PyX Technologies, Inc. |
| 8 | * Copyright (c) 2005-2006 SBE, Inc. All Rights Reserved. |
| 9 | * Copyright (c) 2007-2010 Rising Tide Systems |
| 10 | * Copyright (c) 2008-2010 Linux-iSCSI.org |
| 11 | * |
| 12 | * Nicholas A. Bellinger <nab@kernel.org> |
| 13 | * |
| 14 | * This program is free software; you can redistribute it and/or modify |
| 15 | * it under the terms of the GNU General Public License as published by |
| 16 | * the Free Software Foundation; either version 2 of the License, or |
| 17 | * (at your option) any later version. |
| 18 | * |
| 19 | * This program is distributed in the hope that it will be useful, |
| 20 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 21 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 22 | * GNU General Public License for more details. |
| 23 | * |
| 24 | * You should have received a copy of the GNU General Public License |
| 25 | * along with this program; if not, write to the Free Software |
| 26 | * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. |
| 27 | * |
| 28 | ******************************************************************************/ |
| 29 | |
| 30 | #include <linux/net.h> |
| 31 | #include <linux/string.h> |
| 32 | #include <linux/delay.h> |
| 33 | #include <linux/timer.h> |
| 34 | #include <linux/slab.h> |
| 35 | #include <linux/spinlock.h> |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 36 | #include <linux/kthread.h> |
| 37 | #include <linux/in.h> |
| 38 | #include <net/sock.h> |
| 39 | #include <net/tcp.h> |
| 40 | #include <scsi/scsi.h> |
| 41 | |
| 42 | #include <target/target_core_base.h> |
| 43 | #include <target/target_core_device.h> |
| 44 | #include <target/target_core_tpg.h> |
| 45 | #include <target/target_core_transport.h> |
| 46 | #include <target/target_core_fabric_ops.h> |
| 47 | |
| 48 | #include "target_core_alua.h" |
| 49 | #include "target_core_hba.h" |
| 50 | #include "target_core_pr.h" |
| 51 | #include "target_core_ua.h" |
| 52 | |
| 53 | static void se_dev_start(struct se_device *dev); |
| 54 | static void se_dev_stop(struct se_device *dev); |
| 55 | |
| 56 | int transport_get_lun_for_cmd( |
| 57 | struct se_cmd *se_cmd, |
| 58 | unsigned char *cdb, |
| 59 | u32 unpacked_lun) |
| 60 | { |
| 61 | struct se_dev_entry *deve; |
| 62 | struct se_lun *se_lun = NULL; |
| 63 | struct se_session *se_sess = SE_SESS(se_cmd); |
| 64 | unsigned long flags; |
| 65 | int read_only = 0; |
| 66 | |
| 67 | spin_lock_irq(&SE_NODE_ACL(se_sess)->device_list_lock); |
| 68 | deve = se_cmd->se_deve = |
| 69 | &SE_NODE_ACL(se_sess)->device_list[unpacked_lun]; |
| 70 | if (deve->lun_flags & TRANSPORT_LUNFLAGS_INITIATOR_ACCESS) { |
| 71 | if (se_cmd) { |
| 72 | deve->total_cmds++; |
| 73 | deve->total_bytes += se_cmd->data_length; |
| 74 | |
| 75 | if (se_cmd->data_direction == DMA_TO_DEVICE) { |
| 76 | if (deve->lun_flags & |
| 77 | TRANSPORT_LUNFLAGS_READ_ONLY) { |
| 78 | read_only = 1; |
| 79 | goto out; |
| 80 | } |
| 81 | deve->write_bytes += se_cmd->data_length; |
| 82 | } else if (se_cmd->data_direction == |
| 83 | DMA_FROM_DEVICE) { |
| 84 | deve->read_bytes += se_cmd->data_length; |
| 85 | } |
| 86 | } |
| 87 | deve->deve_cmds++; |
| 88 | |
| 89 | se_lun = se_cmd->se_lun = deve->se_lun; |
| 90 | se_cmd->pr_res_key = deve->pr_res_key; |
| 91 | se_cmd->orig_fe_lun = unpacked_lun; |
| 92 | se_cmd->se_orig_obj_ptr = SE_LUN(se_cmd)->lun_se_dev; |
| 93 | se_cmd->se_cmd_flags |= SCF_SE_LUN_CMD; |
| 94 | } |
| 95 | out: |
| 96 | spin_unlock_irq(&SE_NODE_ACL(se_sess)->device_list_lock); |
| 97 | |
| 98 | if (!se_lun) { |
| 99 | if (read_only) { |
| 100 | se_cmd->scsi_sense_reason = TCM_WRITE_PROTECTED; |
| 101 | se_cmd->se_cmd_flags |= SCF_SCSI_CDB_EXCEPTION; |
| 102 | printk("TARGET_CORE[%s]: Detected WRITE_PROTECTED LUN" |
| 103 | " Access for 0x%08x\n", |
| 104 | CMD_TFO(se_cmd)->get_fabric_name(), |
| 105 | unpacked_lun); |
| 106 | return -1; |
| 107 | } else { |
| 108 | /* |
| 109 | * Use the se_portal_group->tpg_virt_lun0 to allow for |
| 110 | * REPORT_LUNS, et al to be returned when no active |
| 111 | * MappedLUN=0 exists for this Initiator Port. |
| 112 | */ |
| 113 | if (unpacked_lun != 0) { |
| 114 | se_cmd->scsi_sense_reason = TCM_NON_EXISTENT_LUN; |
| 115 | se_cmd->se_cmd_flags |= SCF_SCSI_CDB_EXCEPTION; |
| 116 | printk("TARGET_CORE[%s]: Detected NON_EXISTENT_LUN" |
| 117 | " Access for 0x%08x\n", |
| 118 | CMD_TFO(se_cmd)->get_fabric_name(), |
| 119 | unpacked_lun); |
| 120 | return -1; |
| 121 | } |
| 122 | /* |
| 123 | * Force WRITE PROTECT for virtual LUN 0 |
| 124 | */ |
| 125 | if ((se_cmd->data_direction != DMA_FROM_DEVICE) && |
| 126 | (se_cmd->data_direction != DMA_NONE)) { |
| 127 | se_cmd->scsi_sense_reason = TCM_WRITE_PROTECTED; |
| 128 | se_cmd->se_cmd_flags |= SCF_SCSI_CDB_EXCEPTION; |
| 129 | return -1; |
| 130 | } |
| 131 | #if 0 |
| 132 | printk("TARGET_CORE[%s]: Using virtual LUN0! :-)\n", |
| 133 | CMD_TFO(se_cmd)->get_fabric_name()); |
| 134 | #endif |
| 135 | se_lun = se_cmd->se_lun = &se_sess->se_tpg->tpg_virt_lun0; |
| 136 | se_cmd->orig_fe_lun = 0; |
| 137 | se_cmd->se_orig_obj_ptr = SE_LUN(se_cmd)->lun_se_dev; |
| 138 | se_cmd->se_cmd_flags |= SCF_SE_LUN_CMD; |
| 139 | } |
| 140 | } |
| 141 | /* |
| 142 | * Determine if the struct se_lun is online. |
| 143 | */ |
| 144 | /* #warning FIXME: Check for LUN_RESET + UNIT Attention */ |
| 145 | if (se_dev_check_online(se_lun->lun_se_dev) != 0) { |
| 146 | se_cmd->scsi_sense_reason = TCM_NON_EXISTENT_LUN; |
| 147 | se_cmd->se_cmd_flags |= SCF_SCSI_CDB_EXCEPTION; |
| 148 | return -1; |
| 149 | } |
| 150 | |
| 151 | { |
| 152 | struct se_device *dev = se_lun->lun_se_dev; |
| 153 | spin_lock(&dev->stats_lock); |
| 154 | dev->num_cmds++; |
| 155 | if (se_cmd->data_direction == DMA_TO_DEVICE) |
| 156 | dev->write_bytes += se_cmd->data_length; |
| 157 | else if (se_cmd->data_direction == DMA_FROM_DEVICE) |
| 158 | dev->read_bytes += se_cmd->data_length; |
| 159 | spin_unlock(&dev->stats_lock); |
| 160 | } |
| 161 | |
| 162 | /* |
| 163 | * Add the iscsi_cmd_t to the struct se_lun's cmd list. This list is used |
| 164 | * for tracking state of struct se_cmds during LUN shutdown events. |
| 165 | */ |
| 166 | spin_lock_irqsave(&se_lun->lun_cmd_lock, flags); |
| 167 | list_add_tail(&se_cmd->se_lun_list, &se_lun->lun_cmd_list); |
| 168 | atomic_set(&T_TASK(se_cmd)->transport_lun_active, 1); |
| 169 | #if 0 |
| 170 | printk(KERN_INFO "Adding ITT: 0x%08x to LUN LIST[%d]\n", |
| 171 | CMD_TFO(se_cmd)->get_task_tag(se_cmd), se_lun->unpacked_lun); |
| 172 | #endif |
| 173 | spin_unlock_irqrestore(&se_lun->lun_cmd_lock, flags); |
| 174 | |
| 175 | return 0; |
| 176 | } |
| 177 | EXPORT_SYMBOL(transport_get_lun_for_cmd); |
| 178 | |
| 179 | int transport_get_lun_for_tmr( |
| 180 | struct se_cmd *se_cmd, |
| 181 | u32 unpacked_lun) |
| 182 | { |
| 183 | struct se_device *dev = NULL; |
| 184 | struct se_dev_entry *deve; |
| 185 | struct se_lun *se_lun = NULL; |
| 186 | struct se_session *se_sess = SE_SESS(se_cmd); |
| 187 | struct se_tmr_req *se_tmr = se_cmd->se_tmr_req; |
| 188 | |
| 189 | spin_lock_irq(&SE_NODE_ACL(se_sess)->device_list_lock); |
| 190 | deve = se_cmd->se_deve = |
| 191 | &SE_NODE_ACL(se_sess)->device_list[unpacked_lun]; |
| 192 | if (deve->lun_flags & TRANSPORT_LUNFLAGS_INITIATOR_ACCESS) { |
| 193 | se_lun = se_cmd->se_lun = se_tmr->tmr_lun = deve->se_lun; |
| 194 | dev = se_tmr->tmr_dev = se_lun->lun_se_dev; |
| 195 | se_cmd->pr_res_key = deve->pr_res_key; |
| 196 | se_cmd->orig_fe_lun = unpacked_lun; |
| 197 | se_cmd->se_orig_obj_ptr = SE_LUN(se_cmd)->lun_se_dev; |
| 198 | /* se_cmd->se_cmd_flags |= SCF_SE_LUN_CMD; */ |
| 199 | } |
| 200 | spin_unlock_irq(&SE_NODE_ACL(se_sess)->device_list_lock); |
| 201 | |
| 202 | if (!se_lun) { |
| 203 | printk(KERN_INFO "TARGET_CORE[%s]: Detected NON_EXISTENT_LUN" |
| 204 | " Access for 0x%08x\n", |
| 205 | CMD_TFO(se_cmd)->get_fabric_name(), |
| 206 | unpacked_lun); |
| 207 | se_cmd->se_cmd_flags |= SCF_SCSI_CDB_EXCEPTION; |
| 208 | return -1; |
| 209 | } |
| 210 | /* |
| 211 | * Determine if the struct se_lun is online. |
| 212 | */ |
| 213 | /* #warning FIXME: Check for LUN_RESET + UNIT Attention */ |
| 214 | if (se_dev_check_online(se_lun->lun_se_dev) != 0) { |
| 215 | se_cmd->se_cmd_flags |= SCF_SCSI_CDB_EXCEPTION; |
| 216 | return -1; |
| 217 | } |
| 218 | |
| 219 | spin_lock(&dev->se_tmr_lock); |
| 220 | list_add_tail(&se_tmr->tmr_list, &dev->dev_tmr_list); |
| 221 | spin_unlock(&dev->se_tmr_lock); |
| 222 | |
| 223 | return 0; |
| 224 | } |
| 225 | EXPORT_SYMBOL(transport_get_lun_for_tmr); |
| 226 | |
| 227 | /* |
| 228 | * This function is called from core_scsi3_emulate_pro_register_and_move() |
| 229 | * and core_scsi3_decode_spec_i_port(), and will increment &deve->pr_ref_count |
| 230 | * when a matching rtpi is found. |
| 231 | */ |
| 232 | struct se_dev_entry *core_get_se_deve_from_rtpi( |
| 233 | struct se_node_acl *nacl, |
| 234 | u16 rtpi) |
| 235 | { |
| 236 | struct se_dev_entry *deve; |
| 237 | struct se_lun *lun; |
| 238 | struct se_port *port; |
| 239 | struct se_portal_group *tpg = nacl->se_tpg; |
| 240 | u32 i; |
| 241 | |
| 242 | spin_lock_irq(&nacl->device_list_lock); |
| 243 | for (i = 0; i < TRANSPORT_MAX_LUNS_PER_TPG; i++) { |
| 244 | deve = &nacl->device_list[i]; |
| 245 | |
| 246 | if (!(deve->lun_flags & TRANSPORT_LUNFLAGS_INITIATOR_ACCESS)) |
| 247 | continue; |
| 248 | |
| 249 | lun = deve->se_lun; |
| 250 | if (!(lun)) { |
| 251 | printk(KERN_ERR "%s device entries device pointer is" |
| 252 | " NULL, but Initiator has access.\n", |
| 253 | TPG_TFO(tpg)->get_fabric_name()); |
| 254 | continue; |
| 255 | } |
| 256 | port = lun->lun_sep; |
| 257 | if (!(port)) { |
| 258 | printk(KERN_ERR "%s device entries device pointer is" |
| 259 | " NULL, but Initiator has access.\n", |
| 260 | TPG_TFO(tpg)->get_fabric_name()); |
| 261 | continue; |
| 262 | } |
| 263 | if (port->sep_rtpi != rtpi) |
| 264 | continue; |
| 265 | |
| 266 | atomic_inc(&deve->pr_ref_count); |
| 267 | smp_mb__after_atomic_inc(); |
| 268 | spin_unlock_irq(&nacl->device_list_lock); |
| 269 | |
| 270 | return deve; |
| 271 | } |
| 272 | spin_unlock_irq(&nacl->device_list_lock); |
| 273 | |
| 274 | return NULL; |
| 275 | } |
| 276 | |
| 277 | int core_free_device_list_for_node( |
| 278 | struct se_node_acl *nacl, |
| 279 | struct se_portal_group *tpg) |
| 280 | { |
| 281 | struct se_dev_entry *deve; |
| 282 | struct se_lun *lun; |
| 283 | u32 i; |
| 284 | |
| 285 | if (!nacl->device_list) |
| 286 | return 0; |
| 287 | |
| 288 | spin_lock_irq(&nacl->device_list_lock); |
| 289 | for (i = 0; i < TRANSPORT_MAX_LUNS_PER_TPG; i++) { |
| 290 | deve = &nacl->device_list[i]; |
| 291 | |
| 292 | if (!(deve->lun_flags & TRANSPORT_LUNFLAGS_INITIATOR_ACCESS)) |
| 293 | continue; |
| 294 | |
| 295 | if (!deve->se_lun) { |
| 296 | printk(KERN_ERR "%s device entries device pointer is" |
| 297 | " NULL, but Initiator has access.\n", |
| 298 | TPG_TFO(tpg)->get_fabric_name()); |
| 299 | continue; |
| 300 | } |
| 301 | lun = deve->se_lun; |
| 302 | |
| 303 | spin_unlock_irq(&nacl->device_list_lock); |
| 304 | core_update_device_list_for_node(lun, NULL, deve->mapped_lun, |
| 305 | TRANSPORT_LUNFLAGS_NO_ACCESS, nacl, tpg, 0); |
| 306 | spin_lock_irq(&nacl->device_list_lock); |
| 307 | } |
| 308 | spin_unlock_irq(&nacl->device_list_lock); |
| 309 | |
| 310 | kfree(nacl->device_list); |
| 311 | nacl->device_list = NULL; |
| 312 | |
| 313 | return 0; |
| 314 | } |
| 315 | |
| 316 | void core_dec_lacl_count(struct se_node_acl *se_nacl, struct se_cmd *se_cmd) |
| 317 | { |
| 318 | struct se_dev_entry *deve; |
| 319 | |
| 320 | spin_lock_irq(&se_nacl->device_list_lock); |
| 321 | deve = &se_nacl->device_list[se_cmd->orig_fe_lun]; |
| 322 | deve->deve_cmds--; |
| 323 | spin_unlock_irq(&se_nacl->device_list_lock); |
| 324 | |
| 325 | return; |
| 326 | } |
| 327 | |
| 328 | void core_update_device_list_access( |
| 329 | u32 mapped_lun, |
| 330 | u32 lun_access, |
| 331 | struct se_node_acl *nacl) |
| 332 | { |
| 333 | struct se_dev_entry *deve; |
| 334 | |
| 335 | spin_lock_irq(&nacl->device_list_lock); |
| 336 | deve = &nacl->device_list[mapped_lun]; |
| 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 | spin_unlock_irq(&nacl->device_list_lock); |
| 345 | |
| 346 | return; |
| 347 | } |
| 348 | |
| 349 | /* core_update_device_list_for_node(): |
| 350 | * |
| 351 | * |
| 352 | */ |
| 353 | int core_update_device_list_for_node( |
| 354 | struct se_lun *lun, |
| 355 | struct se_lun_acl *lun_acl, |
| 356 | u32 mapped_lun, |
| 357 | u32 lun_access, |
| 358 | struct se_node_acl *nacl, |
| 359 | struct se_portal_group *tpg, |
| 360 | int enable) |
| 361 | { |
| 362 | struct se_port *port = lun->lun_sep; |
| 363 | struct se_dev_entry *deve = &nacl->device_list[mapped_lun]; |
| 364 | int trans = 0; |
| 365 | /* |
| 366 | * If the MappedLUN entry is being disabled, the entry in |
| 367 | * port->sep_alua_list must be removed now before clearing the |
| 368 | * struct se_dev_entry pointers below as logic in |
| 369 | * core_alua_do_transition_tg_pt() depends on these being present. |
| 370 | */ |
| 371 | if (!(enable)) { |
| 372 | /* |
| 373 | * deve->se_lun_acl will be NULL for demo-mode created LUNs |
| 374 | * that have not been explictly concerted to MappedLUNs -> |
Nicholas Bellinger | 29fe609 | 2011-02-09 15:34:43 -0800 | [diff] [blame] | 375 | * struct se_lun_acl, but we remove deve->alua_port_list from |
| 376 | * port->sep_alua_list. This also means that active UAs and |
| 377 | * NodeACL context specific PR metadata for demo-mode |
| 378 | * MappedLUN *deve will be released below.. |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 379 | */ |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 380 | spin_lock_bh(&port->sep_alua_lock); |
| 381 | list_del(&deve->alua_port_list); |
| 382 | spin_unlock_bh(&port->sep_alua_lock); |
| 383 | } |
| 384 | |
| 385 | spin_lock_irq(&nacl->device_list_lock); |
| 386 | if (enable) { |
| 387 | /* |
| 388 | * Check if the call is handling demo mode -> explict LUN ACL |
| 389 | * transition. This transition must be for the same struct se_lun |
| 390 | * + mapped_lun that was setup in demo mode.. |
| 391 | */ |
| 392 | if (deve->lun_flags & TRANSPORT_LUNFLAGS_INITIATOR_ACCESS) { |
| 393 | if (deve->se_lun_acl != NULL) { |
| 394 | printk(KERN_ERR "struct se_dev_entry->se_lun_acl" |
| 395 | " already set for demo mode -> explict" |
| 396 | " LUN ACL transition\n"); |
Fubo Chen | 85dc98d | 2011-02-09 15:34:48 -0800 | [diff] [blame] | 397 | spin_unlock_irq(&nacl->device_list_lock); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 398 | return -1; |
| 399 | } |
| 400 | if (deve->se_lun != lun) { |
| 401 | printk(KERN_ERR "struct se_dev_entry->se_lun does" |
| 402 | " match passed struct se_lun for demo mode" |
| 403 | " -> explict LUN ACL transition\n"); |
Fubo Chen | 85dc98d | 2011-02-09 15:34:48 -0800 | [diff] [blame] | 404 | spin_unlock_irq(&nacl->device_list_lock); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 405 | return -1; |
| 406 | } |
| 407 | deve->se_lun_acl = lun_acl; |
| 408 | trans = 1; |
| 409 | } else { |
| 410 | deve->se_lun = lun; |
| 411 | deve->se_lun_acl = lun_acl; |
| 412 | deve->mapped_lun = mapped_lun; |
| 413 | deve->lun_flags |= TRANSPORT_LUNFLAGS_INITIATOR_ACCESS; |
| 414 | } |
| 415 | |
| 416 | if (lun_access & TRANSPORT_LUNFLAGS_READ_WRITE) { |
| 417 | deve->lun_flags &= ~TRANSPORT_LUNFLAGS_READ_ONLY; |
| 418 | deve->lun_flags |= TRANSPORT_LUNFLAGS_READ_WRITE; |
| 419 | } else { |
| 420 | deve->lun_flags &= ~TRANSPORT_LUNFLAGS_READ_WRITE; |
| 421 | deve->lun_flags |= TRANSPORT_LUNFLAGS_READ_ONLY; |
| 422 | } |
| 423 | |
| 424 | if (trans) { |
| 425 | spin_unlock_irq(&nacl->device_list_lock); |
| 426 | return 0; |
| 427 | } |
| 428 | deve->creation_time = get_jiffies_64(); |
| 429 | deve->attach_count++; |
| 430 | spin_unlock_irq(&nacl->device_list_lock); |
| 431 | |
| 432 | spin_lock_bh(&port->sep_alua_lock); |
| 433 | list_add_tail(&deve->alua_port_list, &port->sep_alua_list); |
| 434 | spin_unlock_bh(&port->sep_alua_lock); |
| 435 | |
| 436 | return 0; |
| 437 | } |
| 438 | /* |
| 439 | * Wait for any in process SPEC_I_PT=1 or REGISTER_AND_MOVE |
| 440 | * PR operation to complete. |
| 441 | */ |
| 442 | spin_unlock_irq(&nacl->device_list_lock); |
| 443 | while (atomic_read(&deve->pr_ref_count) != 0) |
| 444 | cpu_relax(); |
| 445 | spin_lock_irq(&nacl->device_list_lock); |
| 446 | /* |
| 447 | * Disable struct se_dev_entry LUN ACL mapping |
| 448 | */ |
| 449 | core_scsi3_ua_release_all(deve); |
| 450 | deve->se_lun = NULL; |
| 451 | deve->se_lun_acl = NULL; |
| 452 | deve->lun_flags = 0; |
| 453 | deve->creation_time = 0; |
| 454 | deve->attach_count--; |
| 455 | spin_unlock_irq(&nacl->device_list_lock); |
| 456 | |
| 457 | core_scsi3_free_pr_reg_from_nacl(lun->lun_se_dev, nacl); |
| 458 | return 0; |
| 459 | } |
| 460 | |
| 461 | /* core_clear_lun_from_tpg(): |
| 462 | * |
| 463 | * |
| 464 | */ |
| 465 | void core_clear_lun_from_tpg(struct se_lun *lun, struct se_portal_group *tpg) |
| 466 | { |
| 467 | struct se_node_acl *nacl; |
| 468 | struct se_dev_entry *deve; |
| 469 | u32 i; |
| 470 | |
| 471 | spin_lock_bh(&tpg->acl_node_lock); |
| 472 | list_for_each_entry(nacl, &tpg->acl_node_list, acl_list) { |
| 473 | spin_unlock_bh(&tpg->acl_node_lock); |
| 474 | |
| 475 | spin_lock_irq(&nacl->device_list_lock); |
| 476 | for (i = 0; i < TRANSPORT_MAX_LUNS_PER_TPG; i++) { |
| 477 | deve = &nacl->device_list[i]; |
| 478 | if (lun != deve->se_lun) |
| 479 | continue; |
| 480 | spin_unlock_irq(&nacl->device_list_lock); |
| 481 | |
| 482 | core_update_device_list_for_node(lun, NULL, |
| 483 | deve->mapped_lun, TRANSPORT_LUNFLAGS_NO_ACCESS, |
| 484 | nacl, tpg, 0); |
| 485 | |
| 486 | spin_lock_irq(&nacl->device_list_lock); |
| 487 | } |
| 488 | spin_unlock_irq(&nacl->device_list_lock); |
| 489 | |
| 490 | spin_lock_bh(&tpg->acl_node_lock); |
| 491 | } |
| 492 | spin_unlock_bh(&tpg->acl_node_lock); |
| 493 | |
| 494 | return; |
| 495 | } |
| 496 | |
| 497 | static struct se_port *core_alloc_port(struct se_device *dev) |
| 498 | { |
| 499 | struct se_port *port, *port_tmp; |
| 500 | |
| 501 | port = kzalloc(sizeof(struct se_port), GFP_KERNEL); |
| 502 | if (!(port)) { |
| 503 | printk(KERN_ERR "Unable to allocate struct se_port\n"); |
| 504 | return NULL; |
| 505 | } |
| 506 | INIT_LIST_HEAD(&port->sep_alua_list); |
| 507 | INIT_LIST_HEAD(&port->sep_list); |
| 508 | atomic_set(&port->sep_tg_pt_secondary_offline, 0); |
| 509 | spin_lock_init(&port->sep_alua_lock); |
| 510 | mutex_init(&port->sep_tg_pt_md_mutex); |
| 511 | |
| 512 | spin_lock(&dev->se_port_lock); |
| 513 | if (dev->dev_port_count == 0x0000ffff) { |
| 514 | printk(KERN_WARNING "Reached dev->dev_port_count ==" |
| 515 | " 0x0000ffff\n"); |
| 516 | spin_unlock(&dev->se_port_lock); |
| 517 | return NULL; |
| 518 | } |
| 519 | again: |
| 520 | /* |
| 521 | * Allocate the next RELATIVE TARGET PORT IDENTIFER for this struct se_device |
| 522 | * Here is the table from spc4r17 section 7.7.3.8. |
| 523 | * |
| 524 | * Table 473 -- RELATIVE TARGET PORT IDENTIFIER field |
| 525 | * |
| 526 | * Code Description |
| 527 | * 0h Reserved |
| 528 | * 1h Relative port 1, historically known as port A |
| 529 | * 2h Relative port 2, historically known as port B |
| 530 | * 3h to FFFFh Relative port 3 through 65 535 |
| 531 | */ |
| 532 | port->sep_rtpi = dev->dev_rpti_counter++; |
| 533 | if (!(port->sep_rtpi)) |
| 534 | goto again; |
| 535 | |
| 536 | list_for_each_entry(port_tmp, &dev->dev_sep_list, sep_list) { |
| 537 | /* |
| 538 | * Make sure RELATIVE TARGET PORT IDENTIFER is unique |
| 539 | * for 16-bit wrap.. |
| 540 | */ |
| 541 | if (port->sep_rtpi == port_tmp->sep_rtpi) |
| 542 | goto again; |
| 543 | } |
| 544 | spin_unlock(&dev->se_port_lock); |
| 545 | |
| 546 | return port; |
| 547 | } |
| 548 | |
| 549 | static void core_export_port( |
| 550 | struct se_device *dev, |
| 551 | struct se_portal_group *tpg, |
| 552 | struct se_port *port, |
| 553 | struct se_lun *lun) |
| 554 | { |
| 555 | struct se_subsystem_dev *su_dev = SU_DEV(dev); |
| 556 | struct t10_alua_tg_pt_gp_member *tg_pt_gp_mem = NULL; |
| 557 | |
| 558 | spin_lock(&dev->se_port_lock); |
| 559 | spin_lock(&lun->lun_sep_lock); |
| 560 | port->sep_tpg = tpg; |
| 561 | port->sep_lun = lun; |
| 562 | lun->lun_sep = port; |
| 563 | spin_unlock(&lun->lun_sep_lock); |
| 564 | |
| 565 | list_add_tail(&port->sep_list, &dev->dev_sep_list); |
| 566 | spin_unlock(&dev->se_port_lock); |
| 567 | |
| 568 | if (T10_ALUA(su_dev)->alua_type == SPC3_ALUA_EMULATED) { |
| 569 | tg_pt_gp_mem = core_alua_allocate_tg_pt_gp_mem(port); |
| 570 | if (IS_ERR(tg_pt_gp_mem) || !tg_pt_gp_mem) { |
| 571 | printk(KERN_ERR "Unable to allocate t10_alua_tg_pt" |
| 572 | "_gp_member_t\n"); |
| 573 | return; |
| 574 | } |
| 575 | spin_lock(&tg_pt_gp_mem->tg_pt_gp_mem_lock); |
| 576 | __core_alua_attach_tg_pt_gp_mem(tg_pt_gp_mem, |
| 577 | T10_ALUA(su_dev)->default_tg_pt_gp); |
| 578 | spin_unlock(&tg_pt_gp_mem->tg_pt_gp_mem_lock); |
| 579 | printk(KERN_INFO "%s/%s: Adding to default ALUA Target Port" |
| 580 | " Group: alua/default_tg_pt_gp\n", |
| 581 | TRANSPORT(dev)->name, TPG_TFO(tpg)->get_fabric_name()); |
| 582 | } |
| 583 | |
| 584 | dev->dev_port_count++; |
| 585 | port->sep_index = port->sep_rtpi; /* RELATIVE TARGET PORT IDENTIFER */ |
| 586 | } |
| 587 | |
| 588 | /* |
| 589 | * Called with struct se_device->se_port_lock spinlock held. |
| 590 | */ |
| 591 | static void core_release_port(struct se_device *dev, struct se_port *port) |
| 592 | { |
| 593 | /* |
| 594 | * Wait for any port reference for PR ALL_TG_PT=1 operation |
| 595 | * to complete in __core_scsi3_alloc_registration() |
| 596 | */ |
| 597 | spin_unlock(&dev->se_port_lock); |
| 598 | if (atomic_read(&port->sep_tg_pt_ref_cnt)) |
| 599 | cpu_relax(); |
| 600 | spin_lock(&dev->se_port_lock); |
| 601 | |
| 602 | core_alua_free_tg_pt_gp_mem(port); |
| 603 | |
| 604 | list_del(&port->sep_list); |
| 605 | dev->dev_port_count--; |
| 606 | kfree(port); |
| 607 | |
| 608 | return; |
| 609 | } |
| 610 | |
| 611 | int core_dev_export( |
| 612 | struct se_device *dev, |
| 613 | struct se_portal_group *tpg, |
| 614 | struct se_lun *lun) |
| 615 | { |
| 616 | struct se_port *port; |
| 617 | |
| 618 | port = core_alloc_port(dev); |
| 619 | if (!(port)) |
| 620 | return -1; |
| 621 | |
| 622 | lun->lun_se_dev = dev; |
| 623 | se_dev_start(dev); |
| 624 | |
| 625 | atomic_inc(&dev->dev_export_obj.obj_access_count); |
| 626 | core_export_port(dev, tpg, port, lun); |
| 627 | return 0; |
| 628 | } |
| 629 | |
| 630 | void core_dev_unexport( |
| 631 | struct se_device *dev, |
| 632 | struct se_portal_group *tpg, |
| 633 | struct se_lun *lun) |
| 634 | { |
| 635 | struct se_port *port = lun->lun_sep; |
| 636 | |
| 637 | spin_lock(&lun->lun_sep_lock); |
| 638 | if (lun->lun_se_dev == NULL) { |
| 639 | spin_unlock(&lun->lun_sep_lock); |
| 640 | return; |
| 641 | } |
| 642 | spin_unlock(&lun->lun_sep_lock); |
| 643 | |
| 644 | spin_lock(&dev->se_port_lock); |
| 645 | atomic_dec(&dev->dev_export_obj.obj_access_count); |
| 646 | core_release_port(dev, port); |
| 647 | spin_unlock(&dev->se_port_lock); |
| 648 | |
| 649 | se_dev_stop(dev); |
| 650 | lun->lun_se_dev = NULL; |
| 651 | } |
| 652 | |
| 653 | int transport_core_report_lun_response(struct se_cmd *se_cmd) |
| 654 | { |
| 655 | struct se_dev_entry *deve; |
| 656 | struct se_lun *se_lun; |
| 657 | struct se_session *se_sess = SE_SESS(se_cmd); |
| 658 | struct se_task *se_task; |
| 659 | unsigned char *buf = (unsigned char *)T_TASK(se_cmd)->t_task_buf; |
| 660 | u32 cdb_offset = 0, lun_count = 0, offset = 8; |
| 661 | u64 i, lun; |
| 662 | |
| 663 | list_for_each_entry(se_task, &T_TASK(se_cmd)->t_task_list, t_list) |
| 664 | break; |
| 665 | |
| 666 | if (!(se_task)) { |
| 667 | printk(KERN_ERR "Unable to locate struct se_task for struct se_cmd\n"); |
| 668 | return PYX_TRANSPORT_LU_COMM_FAILURE; |
| 669 | } |
| 670 | |
| 671 | /* |
| 672 | * If no struct se_session pointer is present, this struct se_cmd is |
| 673 | * coming via a target_core_mod PASSTHROUGH op, and not through |
| 674 | * a $FABRIC_MOD. In that case, report LUN=0 only. |
| 675 | */ |
| 676 | if (!(se_sess)) { |
| 677 | lun = 0; |
| 678 | buf[offset++] = ((lun >> 56) & 0xff); |
| 679 | buf[offset++] = ((lun >> 48) & 0xff); |
| 680 | buf[offset++] = ((lun >> 40) & 0xff); |
| 681 | buf[offset++] = ((lun >> 32) & 0xff); |
| 682 | buf[offset++] = ((lun >> 24) & 0xff); |
| 683 | buf[offset++] = ((lun >> 16) & 0xff); |
| 684 | buf[offset++] = ((lun >> 8) & 0xff); |
| 685 | buf[offset++] = (lun & 0xff); |
| 686 | lun_count = 1; |
| 687 | goto done; |
| 688 | } |
| 689 | |
| 690 | spin_lock_irq(&SE_NODE_ACL(se_sess)->device_list_lock); |
| 691 | for (i = 0; i < TRANSPORT_MAX_LUNS_PER_TPG; i++) { |
| 692 | deve = &SE_NODE_ACL(se_sess)->device_list[i]; |
| 693 | if (!(deve->lun_flags & TRANSPORT_LUNFLAGS_INITIATOR_ACCESS)) |
| 694 | continue; |
| 695 | se_lun = deve->se_lun; |
| 696 | /* |
| 697 | * We determine the correct LUN LIST LENGTH even once we |
| 698 | * have reached the initial allocation length. |
| 699 | * See SPC2-R20 7.19. |
| 700 | */ |
| 701 | lun_count++; |
| 702 | if ((cdb_offset + 8) >= se_cmd->data_length) |
| 703 | continue; |
| 704 | |
| 705 | lun = cpu_to_be64(CMD_TFO(se_cmd)->pack_lun(deve->mapped_lun)); |
| 706 | buf[offset++] = ((lun >> 56) & 0xff); |
| 707 | buf[offset++] = ((lun >> 48) & 0xff); |
| 708 | buf[offset++] = ((lun >> 40) & 0xff); |
| 709 | buf[offset++] = ((lun >> 32) & 0xff); |
| 710 | buf[offset++] = ((lun >> 24) & 0xff); |
| 711 | buf[offset++] = ((lun >> 16) & 0xff); |
| 712 | buf[offset++] = ((lun >> 8) & 0xff); |
| 713 | buf[offset++] = (lun & 0xff); |
| 714 | cdb_offset += 8; |
| 715 | } |
| 716 | spin_unlock_irq(&SE_NODE_ACL(se_sess)->device_list_lock); |
| 717 | |
| 718 | /* |
| 719 | * See SPC3 r07, page 159. |
| 720 | */ |
| 721 | done: |
| 722 | lun_count *= 8; |
| 723 | buf[0] = ((lun_count >> 24) & 0xff); |
| 724 | buf[1] = ((lun_count >> 16) & 0xff); |
| 725 | buf[2] = ((lun_count >> 8) & 0xff); |
| 726 | buf[3] = (lun_count & 0xff); |
| 727 | |
| 728 | return PYX_TRANSPORT_SENT_TO_TRANSPORT; |
| 729 | } |
| 730 | |
| 731 | /* se_release_device_for_hba(): |
| 732 | * |
| 733 | * |
| 734 | */ |
| 735 | void se_release_device_for_hba(struct se_device *dev) |
| 736 | { |
| 737 | struct se_hba *hba = dev->se_hba; |
| 738 | |
| 739 | if ((dev->dev_status & TRANSPORT_DEVICE_ACTIVATED) || |
| 740 | (dev->dev_status & TRANSPORT_DEVICE_DEACTIVATED) || |
| 741 | (dev->dev_status & TRANSPORT_DEVICE_SHUTDOWN) || |
| 742 | (dev->dev_status & TRANSPORT_DEVICE_OFFLINE_ACTIVATED) || |
| 743 | (dev->dev_status & TRANSPORT_DEVICE_OFFLINE_DEACTIVATED)) |
| 744 | se_dev_stop(dev); |
| 745 | |
| 746 | if (dev->dev_ptr) { |
| 747 | kthread_stop(dev->process_thread); |
| 748 | if (dev->transport->free_device) |
| 749 | dev->transport->free_device(dev->dev_ptr); |
| 750 | } |
| 751 | |
| 752 | spin_lock(&hba->device_lock); |
| 753 | list_del(&dev->dev_list); |
| 754 | hba->dev_count--; |
| 755 | spin_unlock(&hba->device_lock); |
| 756 | |
| 757 | core_scsi3_free_all_registrations(dev); |
| 758 | se_release_vpd_for_dev(dev); |
| 759 | |
| 760 | kfree(dev->dev_status_queue_obj); |
| 761 | kfree(dev->dev_queue_obj); |
| 762 | kfree(dev); |
| 763 | |
| 764 | return; |
| 765 | } |
| 766 | |
| 767 | void se_release_vpd_for_dev(struct se_device *dev) |
| 768 | { |
| 769 | struct t10_vpd *vpd, *vpd_tmp; |
| 770 | |
| 771 | spin_lock(&DEV_T10_WWN(dev)->t10_vpd_lock); |
| 772 | list_for_each_entry_safe(vpd, vpd_tmp, |
| 773 | &DEV_T10_WWN(dev)->t10_vpd_list, vpd_list) { |
| 774 | list_del(&vpd->vpd_list); |
| 775 | kfree(vpd); |
| 776 | } |
| 777 | spin_unlock(&DEV_T10_WWN(dev)->t10_vpd_lock); |
| 778 | |
| 779 | return; |
| 780 | } |
| 781 | |
| 782 | /* |
| 783 | * Called with struct se_hba->device_lock held. |
| 784 | */ |
| 785 | void se_clear_dev_ports(struct se_device *dev) |
| 786 | { |
| 787 | struct se_hba *hba = dev->se_hba; |
| 788 | struct se_lun *lun; |
| 789 | struct se_portal_group *tpg; |
| 790 | struct se_port *sep, *sep_tmp; |
| 791 | |
| 792 | spin_lock(&dev->se_port_lock); |
| 793 | list_for_each_entry_safe(sep, sep_tmp, &dev->dev_sep_list, sep_list) { |
| 794 | spin_unlock(&dev->se_port_lock); |
| 795 | spin_unlock(&hba->device_lock); |
| 796 | |
| 797 | lun = sep->sep_lun; |
| 798 | tpg = sep->sep_tpg; |
| 799 | spin_lock(&lun->lun_sep_lock); |
| 800 | if (lun->lun_se_dev == NULL) { |
| 801 | spin_unlock(&lun->lun_sep_lock); |
| 802 | continue; |
| 803 | } |
| 804 | spin_unlock(&lun->lun_sep_lock); |
| 805 | |
| 806 | core_dev_del_lun(tpg, lun->unpacked_lun); |
| 807 | |
| 808 | spin_lock(&hba->device_lock); |
| 809 | spin_lock(&dev->se_port_lock); |
| 810 | } |
| 811 | spin_unlock(&dev->se_port_lock); |
| 812 | |
| 813 | return; |
| 814 | } |
| 815 | |
| 816 | /* se_free_virtual_device(): |
| 817 | * |
| 818 | * Used for IBLOCK, RAMDISK, and FILEIO Transport Drivers. |
| 819 | */ |
| 820 | int se_free_virtual_device(struct se_device *dev, struct se_hba *hba) |
| 821 | { |
| 822 | spin_lock(&hba->device_lock); |
| 823 | se_clear_dev_ports(dev); |
| 824 | spin_unlock(&hba->device_lock); |
| 825 | |
| 826 | core_alua_free_lu_gp_mem(dev); |
| 827 | se_release_device_for_hba(dev); |
| 828 | |
| 829 | return 0; |
| 830 | } |
| 831 | |
| 832 | static void se_dev_start(struct se_device *dev) |
| 833 | { |
| 834 | struct se_hba *hba = dev->se_hba; |
| 835 | |
| 836 | spin_lock(&hba->device_lock); |
| 837 | atomic_inc(&dev->dev_obj.obj_access_count); |
| 838 | if (atomic_read(&dev->dev_obj.obj_access_count) == 1) { |
| 839 | if (dev->dev_status & TRANSPORT_DEVICE_DEACTIVATED) { |
| 840 | dev->dev_status &= ~TRANSPORT_DEVICE_DEACTIVATED; |
| 841 | dev->dev_status |= TRANSPORT_DEVICE_ACTIVATED; |
| 842 | } else if (dev->dev_status & |
| 843 | TRANSPORT_DEVICE_OFFLINE_DEACTIVATED) { |
| 844 | dev->dev_status &= |
| 845 | ~TRANSPORT_DEVICE_OFFLINE_DEACTIVATED; |
| 846 | dev->dev_status |= TRANSPORT_DEVICE_OFFLINE_ACTIVATED; |
| 847 | } |
| 848 | } |
| 849 | spin_unlock(&hba->device_lock); |
| 850 | } |
| 851 | |
| 852 | static void se_dev_stop(struct se_device *dev) |
| 853 | { |
| 854 | struct se_hba *hba = dev->se_hba; |
| 855 | |
| 856 | spin_lock(&hba->device_lock); |
| 857 | atomic_dec(&dev->dev_obj.obj_access_count); |
| 858 | if (atomic_read(&dev->dev_obj.obj_access_count) == 0) { |
| 859 | if (dev->dev_status & TRANSPORT_DEVICE_ACTIVATED) { |
| 860 | dev->dev_status &= ~TRANSPORT_DEVICE_ACTIVATED; |
| 861 | dev->dev_status |= TRANSPORT_DEVICE_DEACTIVATED; |
| 862 | } else if (dev->dev_status & |
| 863 | TRANSPORT_DEVICE_OFFLINE_ACTIVATED) { |
| 864 | dev->dev_status &= ~TRANSPORT_DEVICE_OFFLINE_ACTIVATED; |
| 865 | dev->dev_status |= TRANSPORT_DEVICE_OFFLINE_DEACTIVATED; |
| 866 | } |
| 867 | } |
| 868 | spin_unlock(&hba->device_lock); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 869 | } |
| 870 | |
| 871 | int se_dev_check_online(struct se_device *dev) |
| 872 | { |
| 873 | int ret; |
| 874 | |
| 875 | spin_lock_irq(&dev->dev_status_lock); |
| 876 | ret = ((dev->dev_status & TRANSPORT_DEVICE_ACTIVATED) || |
| 877 | (dev->dev_status & TRANSPORT_DEVICE_DEACTIVATED)) ? 0 : 1; |
| 878 | spin_unlock_irq(&dev->dev_status_lock); |
| 879 | |
| 880 | return ret; |
| 881 | } |
| 882 | |
| 883 | int se_dev_check_shutdown(struct se_device *dev) |
| 884 | { |
| 885 | int ret; |
| 886 | |
| 887 | spin_lock_irq(&dev->dev_status_lock); |
| 888 | ret = (dev->dev_status & TRANSPORT_DEVICE_SHUTDOWN); |
| 889 | spin_unlock_irq(&dev->dev_status_lock); |
| 890 | |
| 891 | return ret; |
| 892 | } |
| 893 | |
| 894 | void se_dev_set_default_attribs( |
| 895 | struct se_device *dev, |
| 896 | struct se_dev_limits *dev_limits) |
| 897 | { |
| 898 | struct queue_limits *limits = &dev_limits->limits; |
| 899 | |
| 900 | DEV_ATTRIB(dev)->emulate_dpo = DA_EMULATE_DPO; |
| 901 | DEV_ATTRIB(dev)->emulate_fua_write = DA_EMULATE_FUA_WRITE; |
| 902 | DEV_ATTRIB(dev)->emulate_fua_read = DA_EMULATE_FUA_READ; |
| 903 | DEV_ATTRIB(dev)->emulate_write_cache = DA_EMULATE_WRITE_CACHE; |
| 904 | DEV_ATTRIB(dev)->emulate_ua_intlck_ctrl = DA_EMULATE_UA_INTLLCK_CTRL; |
| 905 | DEV_ATTRIB(dev)->emulate_tas = DA_EMULATE_TAS; |
| 906 | DEV_ATTRIB(dev)->emulate_tpu = DA_EMULATE_TPU; |
| 907 | DEV_ATTRIB(dev)->emulate_tpws = DA_EMULATE_TPWS; |
| 908 | DEV_ATTRIB(dev)->emulate_reservations = DA_EMULATE_RESERVATIONS; |
| 909 | DEV_ATTRIB(dev)->emulate_alua = DA_EMULATE_ALUA; |
| 910 | DEV_ATTRIB(dev)->enforce_pr_isids = DA_ENFORCE_PR_ISIDS; |
| 911 | /* |
| 912 | * The TPU=1 and TPWS=1 settings will be set in TCM/IBLOCK |
| 913 | * iblock_create_virtdevice() from struct queue_limits values |
| 914 | * if blk_queue_discard()==1 |
| 915 | */ |
| 916 | DEV_ATTRIB(dev)->max_unmap_lba_count = DA_MAX_UNMAP_LBA_COUNT; |
| 917 | DEV_ATTRIB(dev)->max_unmap_block_desc_count = |
| 918 | DA_MAX_UNMAP_BLOCK_DESC_COUNT; |
| 919 | DEV_ATTRIB(dev)->unmap_granularity = DA_UNMAP_GRANULARITY_DEFAULT; |
| 920 | DEV_ATTRIB(dev)->unmap_granularity_alignment = |
| 921 | DA_UNMAP_GRANULARITY_ALIGNMENT_DEFAULT; |
| 922 | /* |
| 923 | * block_size is based on subsystem plugin dependent requirements. |
| 924 | */ |
| 925 | DEV_ATTRIB(dev)->hw_block_size = limits->logical_block_size; |
| 926 | DEV_ATTRIB(dev)->block_size = limits->logical_block_size; |
| 927 | /* |
| 928 | * max_sectors is based on subsystem plugin dependent requirements. |
| 929 | */ |
| 930 | DEV_ATTRIB(dev)->hw_max_sectors = limits->max_hw_sectors; |
| 931 | DEV_ATTRIB(dev)->max_sectors = limits->max_sectors; |
| 932 | /* |
| 933 | * Set optimal_sectors from max_sectors, which can be lowered via |
| 934 | * configfs. |
| 935 | */ |
| 936 | DEV_ATTRIB(dev)->optimal_sectors = limits->max_sectors; |
| 937 | /* |
| 938 | * queue_depth is based on subsystem plugin dependent requirements. |
| 939 | */ |
| 940 | DEV_ATTRIB(dev)->hw_queue_depth = dev_limits->hw_queue_depth; |
| 941 | DEV_ATTRIB(dev)->queue_depth = dev_limits->queue_depth; |
| 942 | } |
| 943 | |
| 944 | int se_dev_set_task_timeout(struct se_device *dev, u32 task_timeout) |
| 945 | { |
| 946 | if (task_timeout > DA_TASK_TIMEOUT_MAX) { |
| 947 | printk(KERN_ERR "dev[%p]: Passed task_timeout: %u larger then" |
| 948 | " DA_TASK_TIMEOUT_MAX\n", dev, task_timeout); |
| 949 | return -1; |
| 950 | } else { |
| 951 | DEV_ATTRIB(dev)->task_timeout = task_timeout; |
| 952 | printk(KERN_INFO "dev[%p]: Set SE Device task_timeout: %u\n", |
| 953 | dev, task_timeout); |
| 954 | } |
| 955 | |
| 956 | return 0; |
| 957 | } |
| 958 | |
| 959 | int se_dev_set_max_unmap_lba_count( |
| 960 | struct se_device *dev, |
| 961 | u32 max_unmap_lba_count) |
| 962 | { |
| 963 | DEV_ATTRIB(dev)->max_unmap_lba_count = max_unmap_lba_count; |
| 964 | printk(KERN_INFO "dev[%p]: Set max_unmap_lba_count: %u\n", |
| 965 | dev, DEV_ATTRIB(dev)->max_unmap_lba_count); |
| 966 | return 0; |
| 967 | } |
| 968 | |
| 969 | int se_dev_set_max_unmap_block_desc_count( |
| 970 | struct se_device *dev, |
| 971 | u32 max_unmap_block_desc_count) |
| 972 | { |
| 973 | DEV_ATTRIB(dev)->max_unmap_block_desc_count = max_unmap_block_desc_count; |
| 974 | printk(KERN_INFO "dev[%p]: Set max_unmap_block_desc_count: %u\n", |
| 975 | dev, DEV_ATTRIB(dev)->max_unmap_block_desc_count); |
| 976 | return 0; |
| 977 | } |
| 978 | |
| 979 | int se_dev_set_unmap_granularity( |
| 980 | struct se_device *dev, |
| 981 | u32 unmap_granularity) |
| 982 | { |
| 983 | DEV_ATTRIB(dev)->unmap_granularity = unmap_granularity; |
| 984 | printk(KERN_INFO "dev[%p]: Set unmap_granularity: %u\n", |
| 985 | dev, DEV_ATTRIB(dev)->unmap_granularity); |
| 986 | return 0; |
| 987 | } |
| 988 | |
| 989 | int se_dev_set_unmap_granularity_alignment( |
| 990 | struct se_device *dev, |
| 991 | u32 unmap_granularity_alignment) |
| 992 | { |
| 993 | DEV_ATTRIB(dev)->unmap_granularity_alignment = unmap_granularity_alignment; |
| 994 | printk(KERN_INFO "dev[%p]: Set unmap_granularity_alignment: %u\n", |
| 995 | dev, DEV_ATTRIB(dev)->unmap_granularity_alignment); |
| 996 | return 0; |
| 997 | } |
| 998 | |
| 999 | int se_dev_set_emulate_dpo(struct se_device *dev, int flag) |
| 1000 | { |
| 1001 | if ((flag != 0) && (flag != 1)) { |
| 1002 | printk(KERN_ERR "Illegal value %d\n", flag); |
| 1003 | return -1; |
| 1004 | } |
| 1005 | if (TRANSPORT(dev)->dpo_emulated == NULL) { |
| 1006 | printk(KERN_ERR "TRANSPORT(dev)->dpo_emulated is NULL\n"); |
| 1007 | return -1; |
| 1008 | } |
| 1009 | if (TRANSPORT(dev)->dpo_emulated(dev) == 0) { |
| 1010 | printk(KERN_ERR "TRANSPORT(dev)->dpo_emulated not supported\n"); |
| 1011 | return -1; |
| 1012 | } |
| 1013 | DEV_ATTRIB(dev)->emulate_dpo = flag; |
| 1014 | printk(KERN_INFO "dev[%p]: SE Device Page Out (DPO) Emulation" |
| 1015 | " bit: %d\n", dev, DEV_ATTRIB(dev)->emulate_dpo); |
| 1016 | return 0; |
| 1017 | } |
| 1018 | |
| 1019 | int se_dev_set_emulate_fua_write(struct se_device *dev, int flag) |
| 1020 | { |
| 1021 | if ((flag != 0) && (flag != 1)) { |
| 1022 | printk(KERN_ERR "Illegal value %d\n", flag); |
| 1023 | return -1; |
| 1024 | } |
| 1025 | if (TRANSPORT(dev)->fua_write_emulated == NULL) { |
| 1026 | printk(KERN_ERR "TRANSPORT(dev)->fua_write_emulated is NULL\n"); |
| 1027 | return -1; |
| 1028 | } |
| 1029 | if (TRANSPORT(dev)->fua_write_emulated(dev) == 0) { |
| 1030 | printk(KERN_ERR "TRANSPORT(dev)->fua_write_emulated not supported\n"); |
| 1031 | return -1; |
| 1032 | } |
| 1033 | DEV_ATTRIB(dev)->emulate_fua_write = flag; |
| 1034 | printk(KERN_INFO "dev[%p]: SE Device Forced Unit Access WRITEs: %d\n", |
| 1035 | dev, DEV_ATTRIB(dev)->emulate_fua_write); |
| 1036 | return 0; |
| 1037 | } |
| 1038 | |
| 1039 | int se_dev_set_emulate_fua_read(struct se_device *dev, int flag) |
| 1040 | { |
| 1041 | if ((flag != 0) && (flag != 1)) { |
| 1042 | printk(KERN_ERR "Illegal value %d\n", flag); |
| 1043 | return -1; |
| 1044 | } |
| 1045 | if (TRANSPORT(dev)->fua_read_emulated == NULL) { |
| 1046 | printk(KERN_ERR "TRANSPORT(dev)->fua_read_emulated is NULL\n"); |
| 1047 | return -1; |
| 1048 | } |
| 1049 | if (TRANSPORT(dev)->fua_read_emulated(dev) == 0) { |
| 1050 | printk(KERN_ERR "TRANSPORT(dev)->fua_read_emulated not supported\n"); |
| 1051 | return -1; |
| 1052 | } |
| 1053 | DEV_ATTRIB(dev)->emulate_fua_read = flag; |
| 1054 | printk(KERN_INFO "dev[%p]: SE Device Forced Unit Access READs: %d\n", |
| 1055 | dev, DEV_ATTRIB(dev)->emulate_fua_read); |
| 1056 | return 0; |
| 1057 | } |
| 1058 | |
| 1059 | int se_dev_set_emulate_write_cache(struct se_device *dev, int flag) |
| 1060 | { |
| 1061 | if ((flag != 0) && (flag != 1)) { |
| 1062 | printk(KERN_ERR "Illegal value %d\n", flag); |
| 1063 | return -1; |
| 1064 | } |
| 1065 | if (TRANSPORT(dev)->write_cache_emulated == NULL) { |
| 1066 | printk(KERN_ERR "TRANSPORT(dev)->write_cache_emulated is NULL\n"); |
| 1067 | return -1; |
| 1068 | } |
| 1069 | if (TRANSPORT(dev)->write_cache_emulated(dev) == 0) { |
| 1070 | printk(KERN_ERR "TRANSPORT(dev)->write_cache_emulated not supported\n"); |
| 1071 | return -1; |
| 1072 | } |
| 1073 | DEV_ATTRIB(dev)->emulate_write_cache = flag; |
| 1074 | printk(KERN_INFO "dev[%p]: SE Device WRITE_CACHE_EMULATION flag: %d\n", |
| 1075 | dev, DEV_ATTRIB(dev)->emulate_write_cache); |
| 1076 | return 0; |
| 1077 | } |
| 1078 | |
| 1079 | int se_dev_set_emulate_ua_intlck_ctrl(struct se_device *dev, int flag) |
| 1080 | { |
| 1081 | if ((flag != 0) && (flag != 1) && (flag != 2)) { |
| 1082 | printk(KERN_ERR "Illegal value %d\n", flag); |
| 1083 | return -1; |
| 1084 | } |
| 1085 | |
| 1086 | if (atomic_read(&dev->dev_export_obj.obj_access_count)) { |
| 1087 | printk(KERN_ERR "dev[%p]: Unable to change SE Device" |
| 1088 | " UA_INTRLCK_CTRL while dev_export_obj: %d count" |
| 1089 | " exists\n", dev, |
| 1090 | atomic_read(&dev->dev_export_obj.obj_access_count)); |
| 1091 | return -1; |
| 1092 | } |
| 1093 | DEV_ATTRIB(dev)->emulate_ua_intlck_ctrl = flag; |
| 1094 | printk(KERN_INFO "dev[%p]: SE Device UA_INTRLCK_CTRL flag: %d\n", |
| 1095 | dev, DEV_ATTRIB(dev)->emulate_ua_intlck_ctrl); |
| 1096 | |
| 1097 | return 0; |
| 1098 | } |
| 1099 | |
| 1100 | int se_dev_set_emulate_tas(struct se_device *dev, int flag) |
| 1101 | { |
| 1102 | if ((flag != 0) && (flag != 1)) { |
| 1103 | printk(KERN_ERR "Illegal value %d\n", flag); |
| 1104 | return -1; |
| 1105 | } |
| 1106 | |
| 1107 | if (atomic_read(&dev->dev_export_obj.obj_access_count)) { |
| 1108 | printk(KERN_ERR "dev[%p]: Unable to change SE Device TAS while" |
| 1109 | " dev_export_obj: %d count exists\n", dev, |
| 1110 | atomic_read(&dev->dev_export_obj.obj_access_count)); |
| 1111 | return -1; |
| 1112 | } |
| 1113 | DEV_ATTRIB(dev)->emulate_tas = flag; |
| 1114 | printk(KERN_INFO "dev[%p]: SE Device TASK_ABORTED status bit: %s\n", |
| 1115 | dev, (DEV_ATTRIB(dev)->emulate_tas) ? "Enabled" : "Disabled"); |
| 1116 | |
| 1117 | return 0; |
| 1118 | } |
| 1119 | |
| 1120 | int se_dev_set_emulate_tpu(struct se_device *dev, int flag) |
| 1121 | { |
| 1122 | if ((flag != 0) && (flag != 1)) { |
| 1123 | printk(KERN_ERR "Illegal value %d\n", flag); |
| 1124 | return -1; |
| 1125 | } |
| 1126 | /* |
| 1127 | * We expect this value to be non-zero when generic Block Layer |
| 1128 | * Discard supported is detected iblock_create_virtdevice(). |
| 1129 | */ |
| 1130 | if (!(DEV_ATTRIB(dev)->max_unmap_block_desc_count)) { |
| 1131 | printk(KERN_ERR "Generic Block Discard not supported\n"); |
| 1132 | return -ENOSYS; |
| 1133 | } |
| 1134 | |
| 1135 | DEV_ATTRIB(dev)->emulate_tpu = flag; |
| 1136 | printk(KERN_INFO "dev[%p]: SE Device Thin Provisioning UNMAP bit: %d\n", |
| 1137 | dev, flag); |
| 1138 | return 0; |
| 1139 | } |
| 1140 | |
| 1141 | int se_dev_set_emulate_tpws(struct se_device *dev, int flag) |
| 1142 | { |
| 1143 | if ((flag != 0) && (flag != 1)) { |
| 1144 | printk(KERN_ERR "Illegal value %d\n", flag); |
| 1145 | return -1; |
| 1146 | } |
| 1147 | /* |
| 1148 | * We expect this value to be non-zero when generic Block Layer |
| 1149 | * Discard supported is detected iblock_create_virtdevice(). |
| 1150 | */ |
| 1151 | if (!(DEV_ATTRIB(dev)->max_unmap_block_desc_count)) { |
| 1152 | printk(KERN_ERR "Generic Block Discard not supported\n"); |
| 1153 | return -ENOSYS; |
| 1154 | } |
| 1155 | |
| 1156 | DEV_ATTRIB(dev)->emulate_tpws = flag; |
| 1157 | printk(KERN_INFO "dev[%p]: SE Device Thin Provisioning WRITE_SAME: %d\n", |
| 1158 | dev, flag); |
| 1159 | return 0; |
| 1160 | } |
| 1161 | |
| 1162 | int se_dev_set_enforce_pr_isids(struct se_device *dev, int flag) |
| 1163 | { |
| 1164 | if ((flag != 0) && (flag != 1)) { |
| 1165 | printk(KERN_ERR "Illegal value %d\n", flag); |
| 1166 | return -1; |
| 1167 | } |
| 1168 | DEV_ATTRIB(dev)->enforce_pr_isids = flag; |
| 1169 | printk(KERN_INFO "dev[%p]: SE Device enforce_pr_isids bit: %s\n", dev, |
| 1170 | (DEV_ATTRIB(dev)->enforce_pr_isids) ? "Enabled" : "Disabled"); |
| 1171 | return 0; |
| 1172 | } |
| 1173 | |
| 1174 | /* |
| 1175 | * Note, this can only be called on unexported SE Device Object. |
| 1176 | */ |
| 1177 | int se_dev_set_queue_depth(struct se_device *dev, u32 queue_depth) |
| 1178 | { |
| 1179 | u32 orig_queue_depth = dev->queue_depth; |
| 1180 | |
| 1181 | if (atomic_read(&dev->dev_export_obj.obj_access_count)) { |
| 1182 | printk(KERN_ERR "dev[%p]: Unable to change SE Device TCQ while" |
| 1183 | " dev_export_obj: %d count exists\n", dev, |
| 1184 | atomic_read(&dev->dev_export_obj.obj_access_count)); |
| 1185 | return -1; |
| 1186 | } |
| 1187 | if (!(queue_depth)) { |
| 1188 | printk(KERN_ERR "dev[%p]: Illegal ZERO value for queue" |
| 1189 | "_depth\n", dev); |
| 1190 | return -1; |
| 1191 | } |
| 1192 | |
| 1193 | if (TRANSPORT(dev)->transport_type == TRANSPORT_PLUGIN_PHBA_PDEV) { |
| 1194 | if (queue_depth > DEV_ATTRIB(dev)->hw_queue_depth) { |
| 1195 | printk(KERN_ERR "dev[%p]: Passed queue_depth: %u" |
| 1196 | " exceeds TCM/SE_Device TCQ: %u\n", |
| 1197 | dev, queue_depth, |
| 1198 | DEV_ATTRIB(dev)->hw_queue_depth); |
| 1199 | return -1; |
| 1200 | } |
| 1201 | } else { |
| 1202 | if (queue_depth > DEV_ATTRIB(dev)->queue_depth) { |
| 1203 | if (queue_depth > DEV_ATTRIB(dev)->hw_queue_depth) { |
| 1204 | printk(KERN_ERR "dev[%p]: Passed queue_depth:" |
| 1205 | " %u exceeds TCM/SE_Device MAX" |
| 1206 | " TCQ: %u\n", dev, queue_depth, |
| 1207 | DEV_ATTRIB(dev)->hw_queue_depth); |
| 1208 | return -1; |
| 1209 | } |
| 1210 | } |
| 1211 | } |
| 1212 | |
| 1213 | DEV_ATTRIB(dev)->queue_depth = dev->queue_depth = queue_depth; |
| 1214 | if (queue_depth > orig_queue_depth) |
| 1215 | atomic_add(queue_depth - orig_queue_depth, &dev->depth_left); |
| 1216 | else if (queue_depth < orig_queue_depth) |
| 1217 | atomic_sub(orig_queue_depth - queue_depth, &dev->depth_left); |
| 1218 | |
| 1219 | printk(KERN_INFO "dev[%p]: SE Device TCQ Depth changed to: %u\n", |
| 1220 | dev, queue_depth); |
| 1221 | return 0; |
| 1222 | } |
| 1223 | |
| 1224 | int se_dev_set_max_sectors(struct se_device *dev, u32 max_sectors) |
| 1225 | { |
| 1226 | int force = 0; /* Force setting for VDEVS */ |
| 1227 | |
| 1228 | if (atomic_read(&dev->dev_export_obj.obj_access_count)) { |
| 1229 | printk(KERN_ERR "dev[%p]: Unable to change SE Device" |
| 1230 | " max_sectors while dev_export_obj: %d count exists\n", |
| 1231 | dev, atomic_read(&dev->dev_export_obj.obj_access_count)); |
| 1232 | return -1; |
| 1233 | } |
| 1234 | if (!(max_sectors)) { |
| 1235 | printk(KERN_ERR "dev[%p]: Illegal ZERO value for" |
| 1236 | " max_sectors\n", dev); |
| 1237 | return -1; |
| 1238 | } |
| 1239 | if (max_sectors < DA_STATUS_MAX_SECTORS_MIN) { |
| 1240 | printk(KERN_ERR "dev[%p]: Passed max_sectors: %u less than" |
| 1241 | " DA_STATUS_MAX_SECTORS_MIN: %u\n", dev, max_sectors, |
| 1242 | DA_STATUS_MAX_SECTORS_MIN); |
| 1243 | return -1; |
| 1244 | } |
| 1245 | if (TRANSPORT(dev)->transport_type == TRANSPORT_PLUGIN_PHBA_PDEV) { |
| 1246 | if (max_sectors > DEV_ATTRIB(dev)->hw_max_sectors) { |
| 1247 | printk(KERN_ERR "dev[%p]: Passed max_sectors: %u" |
| 1248 | " greater than TCM/SE_Device max_sectors:" |
| 1249 | " %u\n", dev, max_sectors, |
| 1250 | DEV_ATTRIB(dev)->hw_max_sectors); |
| 1251 | return -1; |
| 1252 | } |
| 1253 | } else { |
| 1254 | if (!(force) && (max_sectors > |
| 1255 | DEV_ATTRIB(dev)->hw_max_sectors)) { |
| 1256 | printk(KERN_ERR "dev[%p]: Passed max_sectors: %u" |
| 1257 | " greater than TCM/SE_Device max_sectors" |
| 1258 | ": %u, use force=1 to override.\n", dev, |
| 1259 | max_sectors, DEV_ATTRIB(dev)->hw_max_sectors); |
| 1260 | return -1; |
| 1261 | } |
| 1262 | if (max_sectors > DA_STATUS_MAX_SECTORS_MAX) { |
| 1263 | printk(KERN_ERR "dev[%p]: Passed max_sectors: %u" |
| 1264 | " greater than DA_STATUS_MAX_SECTORS_MAX:" |
| 1265 | " %u\n", dev, max_sectors, |
| 1266 | DA_STATUS_MAX_SECTORS_MAX); |
| 1267 | return -1; |
| 1268 | } |
| 1269 | } |
| 1270 | |
| 1271 | DEV_ATTRIB(dev)->max_sectors = max_sectors; |
| 1272 | printk("dev[%p]: SE Device max_sectors changed to %u\n", |
| 1273 | dev, max_sectors); |
| 1274 | return 0; |
| 1275 | } |
| 1276 | |
| 1277 | int se_dev_set_optimal_sectors(struct se_device *dev, u32 optimal_sectors) |
| 1278 | { |
| 1279 | if (atomic_read(&dev->dev_export_obj.obj_access_count)) { |
| 1280 | printk(KERN_ERR "dev[%p]: Unable to change SE Device" |
| 1281 | " optimal_sectors while dev_export_obj: %d count exists\n", |
| 1282 | dev, atomic_read(&dev->dev_export_obj.obj_access_count)); |
| 1283 | return -EINVAL; |
| 1284 | } |
| 1285 | if (TRANSPORT(dev)->transport_type == TRANSPORT_PLUGIN_PHBA_PDEV) { |
| 1286 | printk(KERN_ERR "dev[%p]: Passed optimal_sectors cannot be" |
| 1287 | " changed for TCM/pSCSI\n", dev); |
| 1288 | return -EINVAL; |
| 1289 | } |
| 1290 | if (optimal_sectors > DEV_ATTRIB(dev)->max_sectors) { |
| 1291 | printk(KERN_ERR "dev[%p]: Passed optimal_sectors %u cannot be" |
| 1292 | " greater than max_sectors: %u\n", dev, |
| 1293 | optimal_sectors, DEV_ATTRIB(dev)->max_sectors); |
| 1294 | return -EINVAL; |
| 1295 | } |
| 1296 | |
| 1297 | DEV_ATTRIB(dev)->optimal_sectors = optimal_sectors; |
| 1298 | printk(KERN_INFO "dev[%p]: SE Device optimal_sectors changed to %u\n", |
| 1299 | dev, optimal_sectors); |
| 1300 | return 0; |
| 1301 | } |
| 1302 | |
| 1303 | int se_dev_set_block_size(struct se_device *dev, u32 block_size) |
| 1304 | { |
| 1305 | if (atomic_read(&dev->dev_export_obj.obj_access_count)) { |
| 1306 | printk(KERN_ERR "dev[%p]: Unable to change SE Device block_size" |
| 1307 | " while dev_export_obj: %d count exists\n", dev, |
| 1308 | atomic_read(&dev->dev_export_obj.obj_access_count)); |
| 1309 | return -1; |
| 1310 | } |
| 1311 | |
| 1312 | if ((block_size != 512) && |
| 1313 | (block_size != 1024) && |
| 1314 | (block_size != 2048) && |
| 1315 | (block_size != 4096)) { |
| 1316 | printk(KERN_ERR "dev[%p]: Illegal value for block_device: %u" |
| 1317 | " for SE device, must be 512, 1024, 2048 or 4096\n", |
| 1318 | dev, block_size); |
| 1319 | return -1; |
| 1320 | } |
| 1321 | |
| 1322 | if (TRANSPORT(dev)->transport_type == TRANSPORT_PLUGIN_PHBA_PDEV) { |
| 1323 | printk(KERN_ERR "dev[%p]: Not allowed to change block_size for" |
| 1324 | " Physical Device, use for Linux/SCSI to change" |
| 1325 | " block_size for underlying hardware\n", dev); |
| 1326 | return -1; |
| 1327 | } |
| 1328 | |
| 1329 | DEV_ATTRIB(dev)->block_size = block_size; |
| 1330 | printk(KERN_INFO "dev[%p]: SE Device block_size changed to %u\n", |
| 1331 | dev, block_size); |
| 1332 | return 0; |
| 1333 | } |
| 1334 | |
| 1335 | struct se_lun *core_dev_add_lun( |
| 1336 | struct se_portal_group *tpg, |
| 1337 | struct se_hba *hba, |
| 1338 | struct se_device *dev, |
| 1339 | u32 lun) |
| 1340 | { |
| 1341 | struct se_lun *lun_p; |
| 1342 | u32 lun_access = 0; |
| 1343 | |
| 1344 | if (atomic_read(&dev->dev_access_obj.obj_access_count) != 0) { |
| 1345 | printk(KERN_ERR "Unable to export struct se_device while dev_access_obj: %d\n", |
| 1346 | atomic_read(&dev->dev_access_obj.obj_access_count)); |
| 1347 | return NULL; |
| 1348 | } |
| 1349 | |
| 1350 | lun_p = core_tpg_pre_addlun(tpg, lun); |
| 1351 | if ((IS_ERR(lun_p)) || !(lun_p)) |
| 1352 | return NULL; |
| 1353 | |
| 1354 | if (dev->dev_flags & DF_READ_ONLY) |
| 1355 | lun_access = TRANSPORT_LUNFLAGS_READ_ONLY; |
| 1356 | else |
| 1357 | lun_access = TRANSPORT_LUNFLAGS_READ_WRITE; |
| 1358 | |
| 1359 | if (core_tpg_post_addlun(tpg, lun_p, lun_access, dev) < 0) |
| 1360 | return NULL; |
| 1361 | |
| 1362 | printk(KERN_INFO "%s_TPG[%u]_LUN[%u] - Activated %s Logical Unit from" |
| 1363 | " CORE HBA: %u\n", TPG_TFO(tpg)->get_fabric_name(), |
| 1364 | TPG_TFO(tpg)->tpg_get_tag(tpg), lun_p->unpacked_lun, |
| 1365 | TPG_TFO(tpg)->get_fabric_name(), hba->hba_id); |
| 1366 | /* |
| 1367 | * Update LUN maps for dynamically added initiators when |
| 1368 | * generate_node_acl is enabled. |
| 1369 | */ |
| 1370 | if (TPG_TFO(tpg)->tpg_check_demo_mode(tpg)) { |
| 1371 | struct se_node_acl *acl; |
| 1372 | spin_lock_bh(&tpg->acl_node_lock); |
| 1373 | list_for_each_entry(acl, &tpg->acl_node_list, acl_list) { |
| 1374 | if (acl->dynamic_node_acl) { |
| 1375 | spin_unlock_bh(&tpg->acl_node_lock); |
| 1376 | core_tpg_add_node_to_devs(acl, tpg); |
| 1377 | spin_lock_bh(&tpg->acl_node_lock); |
| 1378 | } |
| 1379 | } |
| 1380 | spin_unlock_bh(&tpg->acl_node_lock); |
| 1381 | } |
| 1382 | |
| 1383 | return lun_p; |
| 1384 | } |
| 1385 | |
| 1386 | /* core_dev_del_lun(): |
| 1387 | * |
| 1388 | * |
| 1389 | */ |
| 1390 | int core_dev_del_lun( |
| 1391 | struct se_portal_group *tpg, |
| 1392 | u32 unpacked_lun) |
| 1393 | { |
| 1394 | struct se_lun *lun; |
| 1395 | int ret = 0; |
| 1396 | |
| 1397 | lun = core_tpg_pre_dellun(tpg, unpacked_lun, &ret); |
| 1398 | if (!(lun)) |
| 1399 | return ret; |
| 1400 | |
| 1401 | core_tpg_post_dellun(tpg, lun); |
| 1402 | |
| 1403 | printk(KERN_INFO "%s_TPG[%u]_LUN[%u] - Deactivated %s Logical Unit from" |
| 1404 | " device object\n", TPG_TFO(tpg)->get_fabric_name(), |
| 1405 | TPG_TFO(tpg)->tpg_get_tag(tpg), unpacked_lun, |
| 1406 | TPG_TFO(tpg)->get_fabric_name()); |
| 1407 | |
| 1408 | return 0; |
| 1409 | } |
| 1410 | |
| 1411 | struct se_lun *core_get_lun_from_tpg(struct se_portal_group *tpg, u32 unpacked_lun) |
| 1412 | { |
| 1413 | struct se_lun *lun; |
| 1414 | |
| 1415 | spin_lock(&tpg->tpg_lun_lock); |
| 1416 | if (unpacked_lun > (TRANSPORT_MAX_LUNS_PER_TPG-1)) { |
| 1417 | printk(KERN_ERR "%s LUN: %u exceeds TRANSPORT_MAX_LUNS" |
| 1418 | "_PER_TPG-1: %u for Target Portal Group: %hu\n", |
| 1419 | TPG_TFO(tpg)->get_fabric_name(), unpacked_lun, |
| 1420 | TRANSPORT_MAX_LUNS_PER_TPG-1, |
| 1421 | TPG_TFO(tpg)->tpg_get_tag(tpg)); |
| 1422 | spin_unlock(&tpg->tpg_lun_lock); |
| 1423 | return NULL; |
| 1424 | } |
| 1425 | lun = &tpg->tpg_lun_list[unpacked_lun]; |
| 1426 | |
| 1427 | if (lun->lun_status != TRANSPORT_LUN_STATUS_FREE) { |
| 1428 | printk(KERN_ERR "%s Logical Unit Number: %u is not free on" |
| 1429 | " Target Portal Group: %hu, ignoring request.\n", |
| 1430 | TPG_TFO(tpg)->get_fabric_name(), unpacked_lun, |
| 1431 | TPG_TFO(tpg)->tpg_get_tag(tpg)); |
| 1432 | spin_unlock(&tpg->tpg_lun_lock); |
| 1433 | return NULL; |
| 1434 | } |
| 1435 | spin_unlock(&tpg->tpg_lun_lock); |
| 1436 | |
| 1437 | return lun; |
| 1438 | } |
| 1439 | |
| 1440 | /* core_dev_get_lun(): |
| 1441 | * |
| 1442 | * |
| 1443 | */ |
| 1444 | static struct se_lun *core_dev_get_lun(struct se_portal_group *tpg, u32 unpacked_lun) |
| 1445 | { |
| 1446 | struct se_lun *lun; |
| 1447 | |
| 1448 | spin_lock(&tpg->tpg_lun_lock); |
| 1449 | if (unpacked_lun > (TRANSPORT_MAX_LUNS_PER_TPG-1)) { |
| 1450 | printk(KERN_ERR "%s LUN: %u exceeds TRANSPORT_MAX_LUNS_PER" |
| 1451 | "_TPG-1: %u for Target Portal Group: %hu\n", |
| 1452 | TPG_TFO(tpg)->get_fabric_name(), unpacked_lun, |
| 1453 | TRANSPORT_MAX_LUNS_PER_TPG-1, |
| 1454 | TPG_TFO(tpg)->tpg_get_tag(tpg)); |
| 1455 | spin_unlock(&tpg->tpg_lun_lock); |
| 1456 | return NULL; |
| 1457 | } |
| 1458 | lun = &tpg->tpg_lun_list[unpacked_lun]; |
| 1459 | |
| 1460 | if (lun->lun_status != TRANSPORT_LUN_STATUS_ACTIVE) { |
| 1461 | printk(KERN_ERR "%s Logical Unit Number: %u is not active on" |
| 1462 | " Target Portal Group: %hu, ignoring request.\n", |
| 1463 | TPG_TFO(tpg)->get_fabric_name(), unpacked_lun, |
| 1464 | TPG_TFO(tpg)->tpg_get_tag(tpg)); |
| 1465 | spin_unlock(&tpg->tpg_lun_lock); |
| 1466 | return NULL; |
| 1467 | } |
| 1468 | spin_unlock(&tpg->tpg_lun_lock); |
| 1469 | |
| 1470 | return lun; |
| 1471 | } |
| 1472 | |
| 1473 | struct se_lun_acl *core_dev_init_initiator_node_lun_acl( |
| 1474 | struct se_portal_group *tpg, |
| 1475 | u32 mapped_lun, |
| 1476 | char *initiatorname, |
| 1477 | int *ret) |
| 1478 | { |
| 1479 | struct se_lun_acl *lacl; |
| 1480 | struct se_node_acl *nacl; |
| 1481 | |
| 1482 | if (strlen(initiatorname) > TRANSPORT_IQN_LEN) { |
| 1483 | printk(KERN_ERR "%s InitiatorName exceeds maximum size.\n", |
| 1484 | TPG_TFO(tpg)->get_fabric_name()); |
| 1485 | *ret = -EOVERFLOW; |
| 1486 | return NULL; |
| 1487 | } |
| 1488 | nacl = core_tpg_get_initiator_node_acl(tpg, initiatorname); |
| 1489 | if (!(nacl)) { |
| 1490 | *ret = -EINVAL; |
| 1491 | return NULL; |
| 1492 | } |
| 1493 | lacl = kzalloc(sizeof(struct se_lun_acl), GFP_KERNEL); |
| 1494 | if (!(lacl)) { |
| 1495 | printk(KERN_ERR "Unable to allocate memory for struct se_lun_acl.\n"); |
| 1496 | *ret = -ENOMEM; |
| 1497 | return NULL; |
| 1498 | } |
| 1499 | |
| 1500 | INIT_LIST_HEAD(&lacl->lacl_list); |
| 1501 | lacl->mapped_lun = mapped_lun; |
| 1502 | lacl->se_lun_nacl = nacl; |
| 1503 | snprintf(lacl->initiatorname, TRANSPORT_IQN_LEN, "%s", initiatorname); |
| 1504 | |
| 1505 | return lacl; |
| 1506 | } |
| 1507 | |
| 1508 | int core_dev_add_initiator_node_lun_acl( |
| 1509 | struct se_portal_group *tpg, |
| 1510 | struct se_lun_acl *lacl, |
| 1511 | u32 unpacked_lun, |
| 1512 | u32 lun_access) |
| 1513 | { |
| 1514 | struct se_lun *lun; |
| 1515 | struct se_node_acl *nacl; |
| 1516 | |
| 1517 | lun = core_dev_get_lun(tpg, unpacked_lun); |
| 1518 | if (!(lun)) { |
| 1519 | printk(KERN_ERR "%s Logical Unit Number: %u is not active on" |
| 1520 | " Target Portal Group: %hu, ignoring request.\n", |
| 1521 | TPG_TFO(tpg)->get_fabric_name(), unpacked_lun, |
| 1522 | TPG_TFO(tpg)->tpg_get_tag(tpg)); |
| 1523 | return -EINVAL; |
| 1524 | } |
| 1525 | |
| 1526 | nacl = lacl->se_lun_nacl; |
| 1527 | if (!(nacl)) |
| 1528 | return -EINVAL; |
| 1529 | |
| 1530 | if ((lun->lun_access & TRANSPORT_LUNFLAGS_READ_ONLY) && |
| 1531 | (lun_access & TRANSPORT_LUNFLAGS_READ_WRITE)) |
| 1532 | lun_access = TRANSPORT_LUNFLAGS_READ_ONLY; |
| 1533 | |
| 1534 | lacl->se_lun = lun; |
| 1535 | |
| 1536 | if (core_update_device_list_for_node(lun, lacl, lacl->mapped_lun, |
| 1537 | lun_access, nacl, tpg, 1) < 0) |
| 1538 | return -EINVAL; |
| 1539 | |
| 1540 | spin_lock(&lun->lun_acl_lock); |
| 1541 | list_add_tail(&lacl->lacl_list, &lun->lun_acl_list); |
| 1542 | atomic_inc(&lun->lun_acl_count); |
| 1543 | smp_mb__after_atomic_inc(); |
| 1544 | spin_unlock(&lun->lun_acl_lock); |
| 1545 | |
| 1546 | printk(KERN_INFO "%s_TPG[%hu]_LUN[%u->%u] - Added %s ACL for " |
| 1547 | " InitiatorNode: %s\n", TPG_TFO(tpg)->get_fabric_name(), |
| 1548 | TPG_TFO(tpg)->tpg_get_tag(tpg), unpacked_lun, lacl->mapped_lun, |
| 1549 | (lun_access & TRANSPORT_LUNFLAGS_READ_WRITE) ? "RW" : "RO", |
| 1550 | lacl->initiatorname); |
| 1551 | /* |
| 1552 | * Check to see if there are any existing persistent reservation APTPL |
| 1553 | * pre-registrations that need to be enabled for this LUN ACL.. |
| 1554 | */ |
| 1555 | core_scsi3_check_aptpl_registration(lun->lun_se_dev, tpg, lun, lacl); |
| 1556 | return 0; |
| 1557 | } |
| 1558 | |
| 1559 | /* core_dev_del_initiator_node_lun_acl(): |
| 1560 | * |
| 1561 | * |
| 1562 | */ |
| 1563 | int core_dev_del_initiator_node_lun_acl( |
| 1564 | struct se_portal_group *tpg, |
| 1565 | struct se_lun *lun, |
| 1566 | struct se_lun_acl *lacl) |
| 1567 | { |
| 1568 | struct se_node_acl *nacl; |
| 1569 | |
| 1570 | nacl = lacl->se_lun_nacl; |
| 1571 | if (!(nacl)) |
| 1572 | return -EINVAL; |
| 1573 | |
| 1574 | spin_lock(&lun->lun_acl_lock); |
| 1575 | list_del(&lacl->lacl_list); |
| 1576 | atomic_dec(&lun->lun_acl_count); |
| 1577 | smp_mb__after_atomic_dec(); |
| 1578 | spin_unlock(&lun->lun_acl_lock); |
| 1579 | |
| 1580 | core_update_device_list_for_node(lun, NULL, lacl->mapped_lun, |
| 1581 | TRANSPORT_LUNFLAGS_NO_ACCESS, nacl, tpg, 0); |
| 1582 | |
| 1583 | lacl->se_lun = NULL; |
| 1584 | |
| 1585 | printk(KERN_INFO "%s_TPG[%hu]_LUN[%u] - Removed ACL for" |
| 1586 | " InitiatorNode: %s Mapped LUN: %u\n", |
| 1587 | TPG_TFO(tpg)->get_fabric_name(), |
| 1588 | TPG_TFO(tpg)->tpg_get_tag(tpg), lun->unpacked_lun, |
| 1589 | lacl->initiatorname, lacl->mapped_lun); |
| 1590 | |
| 1591 | return 0; |
| 1592 | } |
| 1593 | |
| 1594 | void core_dev_free_initiator_node_lun_acl( |
| 1595 | struct se_portal_group *tpg, |
| 1596 | struct se_lun_acl *lacl) |
| 1597 | { |
| 1598 | printk("%s_TPG[%hu] - Freeing ACL for %s InitiatorNode: %s" |
| 1599 | " Mapped LUN: %u\n", TPG_TFO(tpg)->get_fabric_name(), |
| 1600 | TPG_TFO(tpg)->tpg_get_tag(tpg), |
| 1601 | TPG_TFO(tpg)->get_fabric_name(), |
| 1602 | lacl->initiatorname, lacl->mapped_lun); |
| 1603 | |
| 1604 | kfree(lacl); |
| 1605 | } |
| 1606 | |
| 1607 | int core_dev_setup_virtual_lun0(void) |
| 1608 | { |
| 1609 | struct se_hba *hba; |
| 1610 | struct se_device *dev; |
| 1611 | struct se_subsystem_dev *se_dev = NULL; |
| 1612 | struct se_subsystem_api *t; |
| 1613 | char buf[16]; |
| 1614 | int ret; |
| 1615 | |
| 1616 | hba = core_alloc_hba("rd_dr", 0, HBA_FLAGS_INTERNAL_USE); |
| 1617 | if (IS_ERR(hba)) |
| 1618 | return PTR_ERR(hba); |
| 1619 | |
| 1620 | se_global->g_lun0_hba = hba; |
| 1621 | t = hba->transport; |
| 1622 | |
| 1623 | se_dev = kzalloc(sizeof(struct se_subsystem_dev), GFP_KERNEL); |
| 1624 | if (!(se_dev)) { |
| 1625 | printk(KERN_ERR "Unable to allocate memory for" |
| 1626 | " struct se_subsystem_dev\n"); |
| 1627 | ret = -ENOMEM; |
| 1628 | goto out; |
| 1629 | } |
| 1630 | INIT_LIST_HEAD(&se_dev->g_se_dev_list); |
| 1631 | INIT_LIST_HEAD(&se_dev->t10_wwn.t10_vpd_list); |
| 1632 | spin_lock_init(&se_dev->t10_wwn.t10_vpd_lock); |
| 1633 | INIT_LIST_HEAD(&se_dev->t10_reservation.registration_list); |
| 1634 | INIT_LIST_HEAD(&se_dev->t10_reservation.aptpl_reg_list); |
| 1635 | spin_lock_init(&se_dev->t10_reservation.registration_lock); |
| 1636 | spin_lock_init(&se_dev->t10_reservation.aptpl_reg_lock); |
| 1637 | INIT_LIST_HEAD(&se_dev->t10_alua.tg_pt_gps_list); |
| 1638 | spin_lock_init(&se_dev->t10_alua.tg_pt_gps_lock); |
| 1639 | spin_lock_init(&se_dev->se_dev_lock); |
| 1640 | se_dev->t10_reservation.pr_aptpl_buf_len = PR_APTPL_BUF_LEN; |
| 1641 | se_dev->t10_wwn.t10_sub_dev = se_dev; |
| 1642 | se_dev->t10_alua.t10_sub_dev = se_dev; |
| 1643 | se_dev->se_dev_attrib.da_sub_dev = se_dev; |
| 1644 | se_dev->se_dev_hba = hba; |
| 1645 | |
| 1646 | se_dev->se_dev_su_ptr = t->allocate_virtdevice(hba, "virt_lun0"); |
| 1647 | if (!(se_dev->se_dev_su_ptr)) { |
| 1648 | printk(KERN_ERR "Unable to locate subsystem dependent pointer" |
| 1649 | " from allocate_virtdevice()\n"); |
| 1650 | ret = -ENOMEM; |
| 1651 | goto out; |
| 1652 | } |
| 1653 | se_global->g_lun0_su_dev = se_dev; |
| 1654 | |
| 1655 | memset(buf, 0, 16); |
| 1656 | sprintf(buf, "rd_pages=8"); |
| 1657 | t->set_configfs_dev_params(hba, se_dev, buf, sizeof(buf)); |
| 1658 | |
| 1659 | dev = t->create_virtdevice(hba, se_dev, se_dev->se_dev_su_ptr); |
| 1660 | if (!(dev) || IS_ERR(dev)) { |
| 1661 | ret = -ENOMEM; |
| 1662 | goto out; |
| 1663 | } |
| 1664 | se_dev->se_dev_ptr = dev; |
| 1665 | se_global->g_lun0_dev = dev; |
| 1666 | |
| 1667 | return 0; |
| 1668 | out: |
| 1669 | se_global->g_lun0_su_dev = NULL; |
| 1670 | kfree(se_dev); |
| 1671 | if (se_global->g_lun0_hba) { |
| 1672 | core_delete_hba(se_global->g_lun0_hba); |
| 1673 | se_global->g_lun0_hba = NULL; |
| 1674 | } |
| 1675 | return ret; |
| 1676 | } |
| 1677 | |
| 1678 | |
| 1679 | void core_dev_release_virtual_lun0(void) |
| 1680 | { |
| 1681 | struct se_hba *hba = se_global->g_lun0_hba; |
| 1682 | struct se_subsystem_dev *su_dev = se_global->g_lun0_su_dev; |
| 1683 | |
| 1684 | if (!(hba)) |
| 1685 | return; |
| 1686 | |
| 1687 | if (se_global->g_lun0_dev) |
| 1688 | se_free_virtual_device(se_global->g_lun0_dev, hba); |
| 1689 | |
| 1690 | kfree(su_dev); |
| 1691 | core_delete_hba(hba); |
| 1692 | } |