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Merge branch 'turbostat' of git://git.kernel.org/pub/scm/linux/kernel/git/lenb/linux
[deliverable/linux.git] / drivers / target / target_core_device.c
CommitLineData
c66ac9db
NB		 1/*******************************************************************************
2 * Filename: target_core_device.c (based on iscsi_target_device.c)
3 *
e3d6f909 4 * This file contains the TCM Virtual Device and Disk Transport
c66ac9db
NB		 5 * agnostic related functions.
6 *
4c76251e 7 * (c) Copyright 2003-2013 Datera, Inc.
c66ac9db
NB		 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>
c66ac9db
NB		 33#include <linux/kthread.h>
34#include <linux/in.h>
c53181af 35#include <linux/export.h>
7bfea53b 36#include <asm/unaligned.h>
c66ac9db
NB		 37#include <net/sock.h>
38#include <net/tcp.h>
39#include <scsi/scsi.h>
1078da16 40#include <scsi/scsi_device.h>
c66ac9db
NB		 41
42#include <target/target_core_base.h>
c4795fb2
CH		 43#include <target/target_core_backend.h>
44#include <target/target_core_fabric.h>
c66ac9db 45
e26d99ae 46#include "target_core_internal.h"
c66ac9db 47#include "target_core_alua.h"
c66ac9db
NB		 48#include "target_core_pr.h"
49#include "target_core_ua.h"
50
d9ea32bf
NB		 51DEFINE_MUTEX(g_device_mutex);
52LIST_HEAD(g_device_list);
53
e3d6f909 54static struct se_hba *lun0_hba;
e3d6f909
AG		 55/* not static, needed by tpg.c */
56struct se_device *g_lun0_dev;
57
de103c93
CH		 58sense_reason_t
59transport_lookup_cmd_lun(struct se_cmd *se_cmd, u32 unpacked_lun)
c66ac9db 60{
c66ac9db 61 struct se_lun *se_lun = NULL;
e3d6f909 62 struct se_session *se_sess = se_cmd->se_sess;
5951146d 63 struct se_device *dev;
c66ac9db 64 unsigned long flags;
c66ac9db 65
de103c93
CH		 66 if (unpacked_lun >= TRANSPORT_MAX_LUNS_PER_TPG)
67 return TCM_NON_EXISTENT_LUN;
d8144955 68
78faae37 69 spin_lock_irqsave(&se_sess->se_node_acl->device_list_lock, flags);
f2083241 70 se_cmd->se_deve = se_sess->se_node_acl->device_list[unpacked_lun];
5951146d
AG		 71 if (se_cmd->se_deve->lun_flags & TRANSPORT_LUNFLAGS_INITIATOR_ACCESS) {
72 struct se_dev_entry *deve = se_cmd->se_deve;
73
74 deve->total_cmds++;
5951146d
AG		 75
76 if ((se_cmd->data_direction == DMA_TO_DEVICE) &&
77 (deve->lun_flags & TRANSPORT_LUNFLAGS_READ_ONLY)) {
6708bb27 78 pr_err("TARGET_CORE[%s]: Detected WRITE_PROTECTED LUN"
5951146d
AG		 79 " Access for 0x%08x\n",
80 se_cmd->se_tfo->get_fabric_name(),
81 unpacked_lun);
78faae37 82 spin_unlock_irqrestore(&se_sess->se_node_acl->device_list_lock, flags);
de103c93 83 return TCM_WRITE_PROTECTED;
c66ac9db 84 }
5951146d
AG		 85
86 if (se_cmd->data_direction == DMA_TO_DEVICE)
87 deve->write_bytes += se_cmd->data_length;
88 else if (se_cmd->data_direction == DMA_FROM_DEVICE)
89 deve->read_bytes += se_cmd->data_length;
90
5951146d
AG		 91 se_lun = deve->se_lun;
92 se_cmd->se_lun = deve->se_lun;
c66ac9db
NB		 93 se_cmd->pr_res_key = deve->pr_res_key;
94 se_cmd->orig_fe_lun = unpacked_lun;
c66ac9db 95 se_cmd->se_cmd_flags |= SCF_SE_LUN_CMD;
5277797d
NB		 96
97 percpu_ref_get(&se_lun->lun_ref);
98 se_cmd->lun_ref_active = true;
c66ac9db 99 }
78faae37 100 spin_unlock_irqrestore(&se_sess->se_node_acl->device_list_lock, flags);
c66ac9db
NB		 101
102 if (!se_lun) {
5951146d
AG		 103 /*
104 * Use the se_portal_group->tpg_virt_lun0 to allow for
105 * REPORT_LUNS, et al to be returned when no active
106 * MappedLUN=0 exists for this Initiator Port.
107 */
108 if (unpacked_lun != 0) {
6708bb27 109 pr_err("TARGET_CORE[%s]: Detected NON_EXISTENT_LUN"
c66ac9db 110 " Access for 0x%08x\n",
e3d6f909 111 se_cmd->se_tfo->get_fabric_name(),
c66ac9db 112 unpacked_lun);
de103c93 113 return TCM_NON_EXISTENT_LUN;
5951146d
AG		 114 }
115 /*
116 * Force WRITE PROTECT for virtual LUN 0
117 */
118 if ((se_cmd->data_direction != DMA_FROM_DEVICE) &&
de103c93
CH		 119 (se_cmd->data_direction != DMA_NONE))
120 return TCM_WRITE_PROTECTED;
5951146d
AG		 121
122 se_lun = &se_sess->se_tpg->tpg_virt_lun0;
123 se_cmd->se_lun = &se_sess->se_tpg->tpg_virt_lun0;
124 se_cmd->orig_fe_lun = 0;
5951146d 125 se_cmd->se_cmd_flags |= SCF_SE_LUN_CMD;
5277797d
NB		 126
127 percpu_ref_get(&se_lun->lun_ref);
128 se_cmd->lun_ref_active = true;
c66ac9db 129 }
c66ac9db 130
5951146d
AG		 131 /* Directly associate cmd with se_dev */
132 se_cmd->se_dev = se_lun->lun_se_dev;
133
5951146d 134 dev = se_lun->lun_se_dev;
ee480683 135 atomic_long_inc(&dev->num_cmds);
c66ac9db 136 if (se_cmd->data_direction == DMA_TO_DEVICE)
ee480683 137 atomic_long_add(se_cmd->data_length, &dev->write_bytes);
c66ac9db 138 else if (se_cmd->data_direction == DMA_FROM_DEVICE)
ee480683 139 atomic_long_add(se_cmd->data_length, &dev->read_bytes);
c66ac9db 140
c66ac9db
NB		 141 return 0;
142}
5951146d 143EXPORT_SYMBOL(transport_lookup_cmd_lun);
c66ac9db 144
5951146d 145int transport_lookup_tmr_lun(struct se_cmd *se_cmd, u32 unpacked_lun)
c66ac9db 146{
c66ac9db
NB		 147 struct se_dev_entry *deve;
148 struct se_lun *se_lun = NULL;
e3d6f909 149 struct se_session *se_sess = se_cmd->se_sess;
c66ac9db 150 struct se_tmr_req *se_tmr = se_cmd->se_tmr_req;
5e1be919 151 unsigned long flags;
c66ac9db 152
de103c93 153 if (unpacked_lun >= TRANSPORT_MAX_LUNS_PER_TPG)
e3d6f909 154 return -ENODEV;
d8144955 155
5e1be919 156 spin_lock_irqsave(&se_sess->se_node_acl->device_list_lock, flags);
f2083241 157 se_cmd->se_deve = se_sess->se_node_acl->device_list[unpacked_lun];
5951146d
AG		 158 deve = se_cmd->se_deve;
159
c66ac9db 160 if (deve->lun_flags & TRANSPORT_LUNFLAGS_INITIATOR_ACCESS) {
5951146d
AG		 161 se_tmr->tmr_lun = deve->se_lun;
162 se_cmd->se_lun = deve->se_lun;
163 se_lun = deve->se_lun;
c66ac9db
NB		 164 se_cmd->pr_res_key = deve->pr_res_key;
165 se_cmd->orig_fe_lun = unpacked_lun;
c66ac9db 166 }
5e1be919 167 spin_unlock_irqrestore(&se_sess->se_node_acl->device_list_lock, flags);
c66ac9db
NB		 168
169 if (!se_lun) {
6708bb27 170 pr_debug("TARGET_CORE[%s]: Detected NON_EXISTENT_LUN"
c66ac9db 171 " Access for 0x%08x\n",
e3d6f909 172 se_cmd->se_tfo->get_fabric_name(),
c66ac9db 173 unpacked_lun);
e3d6f909 174 return -ENODEV;
c66ac9db 175 }
c66ac9db 176
5951146d
AG		 177 /* Directly associate cmd with se_dev */
178 se_cmd->se_dev = se_lun->lun_se_dev;
179 se_tmr->tmr_dev = se_lun->lun_se_dev;
180
5e1be919 181 spin_lock_irqsave(&se_tmr->tmr_dev->se_tmr_lock, flags);
5951146d 182 list_add_tail(&se_tmr->tmr_list, &se_tmr->tmr_dev->dev_tmr_list);
5e1be919 183 spin_unlock_irqrestore(&se_tmr->tmr_dev->se_tmr_lock, flags);
c66ac9db
NB		 184
185 return 0;
186}
5951146d 187EXPORT_SYMBOL(transport_lookup_tmr_lun);
c66ac9db
NB		 188
189/*
190 * This function is called from core_scsi3_emulate_pro_register_and_move()
191 * and core_scsi3_decode_spec_i_port(), and will increment &deve->pr_ref_count
192 * when a matching rtpi is found.
193 */
194struct se_dev_entry *core_get_se_deve_from_rtpi(
195 struct se_node_acl *nacl,
196 u16 rtpi)
197{
198 struct se_dev_entry *deve;
199 struct se_lun *lun;
200 struct se_port *port;
201 struct se_portal_group *tpg = nacl->se_tpg;
202 u32 i;
203
204 spin_lock_irq(&nacl->device_list_lock);
205 for (i = 0; i < TRANSPORT_MAX_LUNS_PER_TPG; i++) {
f2083241 206 deve = nacl->device_list[i];
c66ac9db
NB		 207
208 if (!(deve->lun_flags & TRANSPORT_LUNFLAGS_INITIATOR_ACCESS))
209 continue;
210
211 lun = deve->se_lun;
6708bb27
AG		 212 if (!lun) {
213 pr_err("%s device entries device pointer is"
c66ac9db 214 " NULL, but Initiator has access.\n",
e3d6f909 215 tpg->se_tpg_tfo->get_fabric_name());
c66ac9db
NB		 216 continue;
217 }
218 port = lun->lun_sep;
6708bb27
AG		 219 if (!port) {
220 pr_err("%s device entries device pointer is"
c66ac9db 221 " NULL, but Initiator has access.\n",
e3d6f909 222 tpg->se_tpg_tfo->get_fabric_name());
c66ac9db
NB		 223 continue;
224 }
225 if (port->sep_rtpi != rtpi)
226 continue;
227
33940d09 228 atomic_inc_mb(&deve->pr_ref_count);
c66ac9db
NB		 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
238int 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++) {
f2083241 251 deve = nacl->device_list[i];
c66ac9db
NB		 252
253 if (!(deve->lun_flags & TRANSPORT_LUNFLAGS_INITIATOR_ACCESS))
254 continue;
255
256 if (!deve->se_lun) {
6708bb27 257 pr_err("%s device entries device pointer is"
c66ac9db 258 " NULL, but Initiator has access.\n",
e3d6f909 259 tpg->se_tpg_tfo->get_fabric_name());
c66ac9db
NB		 260 continue;
261 }
262 lun = deve->se_lun;
263
264 spin_unlock_irq(&nacl->device_list_lock);
e80ac6c4
AG		 265 core_disable_device_list_for_node(lun, NULL, deve->mapped_lun,
266 TRANSPORT_LUNFLAGS_NO_ACCESS, nacl, tpg);
c66ac9db
NB		 267 spin_lock_irq(&nacl->device_list_lock);
268 }
269 spin_unlock_irq(&nacl->device_list_lock);
270
f2083241 271 array_free(nacl->device_list, TRANSPORT_MAX_LUNS_PER_TPG);
c66ac9db
NB		 272 nacl->device_list = NULL;
273
274 return 0;
275}
276
c66ac9db
NB		 277void 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);
f2083241 285 deve = nacl->device_list[mapped_lun];
c66ac9db
NB		 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);
c66ac9db
NB		 294}
295
e80ac6c4 296/* core_enable_device_list_for_node():
c66ac9db
NB		 297 *
298 *
299 */
e80ac6c4 300int core_enable_device_list_for_node(
c66ac9db
NB		 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,
e80ac6c4 306 struct se_portal_group *tpg)
c66ac9db
NB		 307{
308 struct se_port *port = lun->lun_sep;
e80ac6c4 309 struct se_dev_entry *deve;
c66ac9db
NB		 310
311 spin_lock_irq(&nacl->device_list_lock);
e80ac6c4
AG		 312
313 deve = nacl->device_list[mapped_lun];
314
315 /*
125d0119 316 * Check if the call is handling demo mode -> explicit LUN ACL
e80ac6c4
AG		 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"
125d0119 323 " already set for demo mode -> explicit"
e80ac6c4
AG		 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"
125d0119 331 " -> explicit LUN ACL transition\n");
e80ac6c4
AG		 332 spin_unlock_irq(&nacl->device_list_lock);
333 return -EINVAL;
c66ac9db 334 }
e80ac6c4 335 deve->se_lun_acl = lun_acl;
c66ac9db
NB		 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
c66ac9db 345 spin_unlock_irq(&nacl->device_list_lock);
e80ac6c4
AG		 346 return 0;
347 }
c66ac9db 348
e80ac6c4
AG		 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;
c66ac9db 353
e80ac6c4
AG		 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;
c66ac9db 360 }
e80ac6c4
AG		 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 */
377int 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;
77d4c745 386 struct se_dev_entry *deve = nacl->device_list[mapped_lun];
e80ac6c4
AG		 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);
c66ac9db
NB		 404 /*
405 * Wait for any in process SPEC_I_PT=1 or REGISTER_AND_MOVE
406 * PR operation to complete.
407 */
c66ac9db
NB		 408 while (atomic_read(&deve->pr_ref_count) != 0)
409 cpu_relax();
77d4c745 410
c66ac9db
NB		 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 */
431void 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
28638887 437 spin_lock_irq(&tpg->acl_node_lock);
c66ac9db 438 list_for_each_entry(nacl, &tpg->acl_node_list, acl_list) {
28638887 439 spin_unlock_irq(&tpg->acl_node_lock);
c66ac9db
NB		 440
441 spin_lock_irq(&nacl->device_list_lock);
442 for (i = 0; i < TRANSPORT_MAX_LUNS_PER_TPG; i++) {
f2083241 443 deve = nacl->device_list[i];
c66ac9db
NB		 444 if (lun != deve->se_lun)
445 continue;
446 spin_unlock_irq(&nacl->device_list_lock);
447
e80ac6c4 448 core_disable_device_list_for_node(lun, NULL,
c66ac9db 449 deve->mapped_lun, TRANSPORT_LUNFLAGS_NO_ACCESS,
e80ac6c4 450 nacl, tpg);
c66ac9db
NB		 451
452 spin_lock_irq(&nacl->device_list_lock);
453 }
454 spin_unlock_irq(&nacl->device_list_lock);
455
28638887 456 spin_lock_irq(&tpg->acl_node_lock);
c66ac9db 457 }
28638887 458 spin_unlock_irq(&tpg->acl_node_lock);
c66ac9db
NB		 459}
460
461static 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);
6708bb27
AG		 466 if (!port) {
467 pr_err("Unable to allocate struct se_port\n");
e3d6f909 468 return ERR_PTR(-ENOMEM);
c66ac9db
NB		 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) {
6708bb27 478 pr_warn("Reached dev->dev_port_count =="
c66ac9db
NB		 479 " 0x0000ffff\n");
480 spin_unlock(&dev->se_port_lock);
e3d6f909 481 return ERR_PTR(-ENOSPC);
c66ac9db
NB		 482 }
483again:
484 /*
35d1efe8 485 * Allocate the next RELATIVE TARGET PORT IDENTIFIER for this struct se_device
c66ac9db
NB		 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++;
6708bb27 497 if (!port->sep_rtpi)
c66ac9db
NB		 498 goto again;
499
500 list_for_each_entry(port_tmp, &dev->dev_sep_list, sep_list) {
501 /*
35d1efe8 502 * Make sure RELATIVE TARGET PORT IDENTIFIER is unique
c66ac9db
NB		 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
513static 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{
c66ac9db
NB		 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
a3541703 531 if (!(dev->transport->transport_flags & TRANSPORT_FLAG_PASSTHROUGH) &&
c87fbd56 532 !(dev->se_hba->hba_flags & HBA_FLAGS_INTERNAL_USE)) {
c66ac9db
NB		 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) {
6708bb27 535 pr_err("Unable to allocate t10_alua_tg_pt"
c66ac9db
NB		 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,
0fd97ccf 541 dev->t10_alua.default_tg_pt_gp);
c66ac9db 542 spin_unlock(&tg_pt_gp_mem->tg_pt_gp_mem_lock);
6708bb27 543 pr_debug("%s/%s: Adding to default ALUA Target Port"
c66ac9db 544 " Group: alua/default_tg_pt_gp\n",
e3d6f909 545 dev->transport->name, tpg->se_tpg_tfo->get_fabric_name());
c66ac9db
NB		 546 }
547
548 dev->dev_port_count++;
35d1efe8 549 port->sep_index = port->sep_rtpi; /* RELATIVE TARGET PORT IDENTIFIER */
c66ac9db
NB		 550}
551
552/*
553 * Called with struct se_device->se_port_lock spinlock held.
554 */
555static void core_release_port(struct se_device *dev, struct se_port *port)
5dd7ed2e 556 __releases(&dev->se_port_lock) __acquires(&dev->se_port_lock)
c66ac9db
NB		 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);
c66ac9db
NB		 572}
573
574int core_dev_export(
575 struct se_device *dev,
576 struct se_portal_group *tpg,
577 struct se_lun *lun)
578{
0fd97ccf 579 struct se_hba *hba = dev->se_hba;
c66ac9db
NB		 580 struct se_port *port;
581
582 port = core_alloc_port(dev);
e3d6f909
AG		 583 if (IS_ERR(port))
584 return PTR_ERR(port);
c66ac9db
NB		 585
586 lun->lun_se_dev = dev;
c66ac9db 587
0fd97ccf
CH		 588 spin_lock(&hba->device_lock);
589 dev->export_count++;
590 spin_unlock(&hba->device_lock);
591
c66ac9db
NB		 592 core_export_port(dev, tpg, port, lun);
593 return 0;
594}
595
596void core_dev_unexport(
597 struct se_device *dev,
598 struct se_portal_group *tpg,
599 struct se_lun *lun)
600{
0fd97ccf 601 struct se_hba *hba = dev->se_hba;
c66ac9db
NB		 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);
c66ac9db
NB		 612 core_release_port(dev, port);
613 spin_unlock(&dev->se_port_lock);
614
0fd97ccf
CH		 615 spin_lock(&hba->device_lock);
616 dev->export_count--;
617 spin_unlock(&hba->device_lock);
618
83ff42fc 619 lun->lun_sep = NULL;
c66ac9db
NB		 620 lun->lun_se_dev = NULL;
621}
622
0fd97ccf 623static void se_release_vpd_for_dev(struct se_device *dev)
c66ac9db
NB		 624{
625 struct t10_vpd *vpd, *vpd_tmp;
626
0fd97ccf 627 spin_lock(&dev->t10_wwn.t10_vpd_lock);
c66ac9db 628 list_for_each_entry_safe(vpd, vpd_tmp,
0fd97ccf 629 &dev->t10_wwn.t10_vpd_list, vpd_list) {
c66ac9db
NB		 630 list_del(&vpd->vpd_list);
631 kfree(vpd);
632 }
0fd97ccf 633 spin_unlock(&dev->t10_wwn.t10_vpd_lock);
c66ac9db
NB		 634}
635
c8045372 636static u32 se_dev_align_max_sectors(u32 max_sectors, u32 block_size)
525a48a2 637{
3e03989b
RD		 638 u32 aligned_max_sectors;
639 u32 alignment;
525a48a2
NB		 640 /*
641 * Limit max_sectors to a PAGE_SIZE aligned value for modern
642 * transport_allocate_data_tasks() operation.
643 */
3e03989b
RD		 644 alignment = max(1ul, PAGE_SIZE / block_size);
645 aligned_max_sectors = rounddown(max_sectors, alignment);
646
647 if (max_sectors != aligned_max_sectors)
648 pr_info("Rounding down aligned max_sectors from %u to %u\n",
649 max_sectors, aligned_max_sectors);
525a48a2 650
3e03989b 651 return aligned_max_sectors;
525a48a2
NB		 652}
653
9bc6548f
CVB		 654bool se_dev_check_wce(struct se_device *dev)
655{
656 bool wce = false;
657
658 if (dev->transport->get_write_cache)
659 wce = dev->transport->get_write_cache(dev);
660 else if (dev->dev_attrib.emulate_write_cache > 0)
661 wce = true;
662
663 return wce;
664}
665
c66ac9db
NB		 666int se_dev_set_max_unmap_lba_count(
667 struct se_device *dev,
668 u32 max_unmap_lba_count)
669{
0fd97ccf 670 dev->dev_attrib.max_unmap_lba_count = max_unmap_lba_count;
6708bb27 671 pr_debug("dev[%p]: Set max_unmap_lba_count: %u\n",
0fd97ccf 672 dev, dev->dev_attrib.max_unmap_lba_count);
c66ac9db
NB		 673 return 0;
674}
d30cd123 675EXPORT_SYMBOL(se_dev_set_max_unmap_lba_count);
c66ac9db
NB		 676
677int se_dev_set_max_unmap_block_desc_count(
678 struct se_device *dev,
679 u32 max_unmap_block_desc_count)
680{
0fd97ccf 681 dev->dev_attrib.max_unmap_block_desc_count =
e3d6f909 682 max_unmap_block_desc_count;
6708bb27 683 pr_debug("dev[%p]: Set max_unmap_block_desc_count: %u\n",
0fd97ccf 684 dev, dev->dev_attrib.max_unmap_block_desc_count);
c66ac9db
NB		 685 return 0;
686}
d30cd123 687EXPORT_SYMBOL(se_dev_set_max_unmap_block_desc_count);
c66ac9db
NB		 688
689int se_dev_set_unmap_granularity(
690 struct se_device *dev,
691 u32 unmap_granularity)
692{
0fd97ccf 693 dev->dev_attrib.unmap_granularity = unmap_granularity;
6708bb27 694 pr_debug("dev[%p]: Set unmap_granularity: %u\n",
0fd97ccf 695 dev, dev->dev_attrib.unmap_granularity);
c66ac9db
NB		 696 return 0;
697}
d30cd123 698EXPORT_SYMBOL(se_dev_set_unmap_granularity);
c66ac9db
NB		 699
700int se_dev_set_unmap_granularity_alignment(
701 struct se_device *dev,
702 u32 unmap_granularity_alignment)
703{
0fd97ccf 704 dev->dev_attrib.unmap_granularity_alignment = unmap_granularity_alignment;
6708bb27 705 pr_debug("dev[%p]: Set unmap_granularity_alignment: %u\n",
0fd97ccf 706 dev, dev->dev_attrib.unmap_granularity_alignment);
c66ac9db
NB		 707 return 0;
708}
d30cd123 709EXPORT_SYMBOL(se_dev_set_unmap_granularity_alignment);
c66ac9db 710
773cbaf7
NB		 711int se_dev_set_max_write_same_len(
712 struct se_device *dev,
713 u32 max_write_same_len)
714{
715 dev->dev_attrib.max_write_same_len = max_write_same_len;
716 pr_debug("dev[%p]: Set max_write_same_len: %u\n",
717 dev, dev->dev_attrib.max_write_same_len);
718 return 0;
719}
d30cd123 720EXPORT_SYMBOL(se_dev_set_max_write_same_len);
773cbaf7 721
adfa9570
TB		 722static void dev_set_t10_wwn_model_alias(struct se_device *dev)
723{
724 const char *configname;
725
726 configname = config_item_name(&dev->dev_group.cg_item);
727 if (strlen(configname) >= 16) {
728 pr_warn("dev[%p]: Backstore name '%s' is too long for "
729 "INQUIRY_MODEL, truncating to 16 bytes\n", dev,
730 configname);
731 }
732 snprintf(&dev->t10_wwn.model[0], 16, "%s", configname);
733}
734
735int se_dev_set_emulate_model_alias(struct se_device *dev, int flag)
736{
737 if (dev->export_count) {
738 pr_err("dev[%p]: Unable to change model alias"
739 " while export_count is %d\n",
740 dev, dev->export_count);
741 return -EINVAL;
742 }
743
744 if (flag != 0 && flag != 1) {
745 pr_err("Illegal value %d\n", flag);
746 return -EINVAL;
747 }
748
749 if (flag) {
750 dev_set_t10_wwn_model_alias(dev);
751 } else {
752 strncpy(&dev->t10_wwn.model[0],
753 dev->transport->inquiry_prod, 16);
754 }
755 dev->dev_attrib.emulate_model_alias = flag;
756
757 return 0;
758}
d30cd123 759EXPORT_SYMBOL(se_dev_set_emulate_model_alias);
adfa9570 760
c66ac9db
NB		 761int se_dev_set_emulate_dpo(struct se_device *dev, int flag)
762{
f55918fa 763 if (flag != 0 && flag != 1) {
6708bb27 764 pr_err("Illegal value %d\n", flag);
e3d6f909 765 return -EINVAL;
c66ac9db 766 }
f55918fa 767
c638830d
AG		 768 if (flag) {
769 pr_err("dpo_emulated not supported\n");
770 return -EINVAL;
771 }
772
773 return 0;
c66ac9db 774}
d30cd123 775EXPORT_SYMBOL(se_dev_set_emulate_dpo);
c66ac9db
NB		 776
777int se_dev_set_emulate_fua_write(struct se_device *dev, int flag)
778{
f55918fa 779 if (flag != 0 && flag != 1) {
6708bb27 780 pr_err("Illegal value %d\n", flag);
e3d6f909 781 return -EINVAL;
c66ac9db 782 }
4b36b68c
NB		 783 if (flag &&
784 dev->transport->get_write_cache) {
86d65dc4
AG		 785 pr_warn("emulate_fua_write not supported for this device, ignoring\n");
786 return 0;
4b36b68c
NB		 787 }
788 if (dev->export_count) {
789 pr_err("emulate_fua_write cannot be changed with active"
790 " exports: %d\n", dev->export_count);
791 return -EINVAL;
792 }
0fd97ccf 793 dev->dev_attrib.emulate_fua_write = flag;
6708bb27 794 pr_debug("dev[%p]: SE Device Forced Unit Access WRITEs: %d\n",
0fd97ccf 795 dev, dev->dev_attrib.emulate_fua_write);
c66ac9db
NB		 796 return 0;
797}
d30cd123 798EXPORT_SYMBOL(se_dev_set_emulate_fua_write);
c66ac9db
NB		 799
800int se_dev_set_emulate_fua_read(struct se_device *dev, int flag)
801{
f55918fa 802 if (flag != 0 && flag != 1) {
6708bb27 803 pr_err("Illegal value %d\n", flag);
e3d6f909 804 return -EINVAL;
c66ac9db 805 }
f55918fa 806
c638830d
AG		 807 if (flag) {
808 pr_err("ua read emulated not supported\n");
809 return -EINVAL;
810 }
811
812 return 0;
c66ac9db 813}
d30cd123 814EXPORT_SYMBOL(se_dev_set_emulate_fua_read);
c66ac9db
NB		 815
816int se_dev_set_emulate_write_cache(struct se_device *dev, int flag)
817{
f55918fa 818 if (flag != 0 && flag != 1) {
6708bb27 819 pr_err("Illegal value %d\n", flag);
e3d6f909 820 return -EINVAL;
c66ac9db 821 }
07b8dae3
AG		 822 if (flag &&
823 dev->transport->get_write_cache) {
824 pr_err("emulate_write_cache not supported for this device\n");
825 return -EINVAL;
d0c8b259 826 }
4b36b68c
NB		 827 if (dev->export_count) {
828 pr_err("emulate_write_cache cannot be changed with active"
829 " exports: %d\n", dev->export_count);
830 return -EINVAL;
831 }
0fd97ccf 832 dev->dev_attrib.emulate_write_cache = flag;
6708bb27 833 pr_debug("dev[%p]: SE Device WRITE_CACHE_EMULATION flag: %d\n",
0fd97ccf 834 dev, dev->dev_attrib.emulate_write_cache);
c66ac9db
NB		 835 return 0;
836}
d30cd123 837EXPORT_SYMBOL(se_dev_set_emulate_write_cache);
c66ac9db
NB		 838
839int se_dev_set_emulate_ua_intlck_ctrl(struct se_device *dev, int flag)
840{
841 if ((flag != 0) && (flag != 1) && (flag != 2)) {
6708bb27 842 pr_err("Illegal value %d\n", flag);
e3d6f909 843 return -EINVAL;
c66ac9db
NB		 844 }
845
0fd97ccf 846 if (dev->export_count) {
6708bb27 847 pr_err("dev[%p]: Unable to change SE Device"
0fd97ccf
CH		 848 " UA_INTRLCK_CTRL while export_count is %d\n",
849 dev, dev->export_count);
e3d6f909 850 return -EINVAL;
c66ac9db 851 }
0fd97ccf 852 dev->dev_attrib.emulate_ua_intlck_ctrl = flag;
6708bb27 853 pr_debug("dev[%p]: SE Device UA_INTRLCK_CTRL flag: %d\n",
0fd97ccf 854 dev, dev->dev_attrib.emulate_ua_intlck_ctrl);
c66ac9db
NB		 855
856 return 0;
857}
d30cd123 858EXPORT_SYMBOL(se_dev_set_emulate_ua_intlck_ctrl);
c66ac9db
NB		 859
860int se_dev_set_emulate_tas(struct se_device *dev, int flag)
861{
862 if ((flag != 0) && (flag != 1)) {
6708bb27 863 pr_err("Illegal value %d\n", flag);
e3d6f909 864 return -EINVAL;
c66ac9db
NB		 865 }
866
0fd97ccf 867 if (dev->export_count) {
6708bb27 868 pr_err("dev[%p]: Unable to change SE Device TAS while"
0fd97ccf
CH		 869 " export_count is %d\n",
870 dev, dev->export_count);
e3d6f909 871 return -EINVAL;
c66ac9db 872 }
0fd97ccf 873 dev->dev_attrib.emulate_tas = flag;
6708bb27 874 pr_debug("dev[%p]: SE Device TASK_ABORTED status bit: %s\n",
0fd97ccf 875 dev, (dev->dev_attrib.emulate_tas) ? "Enabled" : "Disabled");
c66ac9db
NB		 876
877 return 0;
878}
d30cd123 879EXPORT_SYMBOL(se_dev_set_emulate_tas);
c66ac9db
NB		 880
881int se_dev_set_emulate_tpu(struct se_device *dev, int flag)
882{
883 if ((flag != 0) && (flag != 1)) {
6708bb27 884 pr_err("Illegal value %d\n", flag);
e3d6f909 885 return -EINVAL;
c66ac9db
NB		 886 }
887 /*
888 * We expect this value to be non-zero when generic Block Layer
889 * Discard supported is detected iblock_create_virtdevice().
890 */
0fd97ccf 891 if (flag && !dev->dev_attrib.max_unmap_block_desc_count) {
6708bb27 892 pr_err("Generic Block Discard not supported\n");
c66ac9db
NB		 893 return -ENOSYS;
894 }
895
0fd97ccf 896 dev->dev_attrib.emulate_tpu = flag;
6708bb27 897 pr_debug("dev[%p]: SE Device Thin Provisioning UNMAP bit: %d\n",
c66ac9db
NB		 898 dev, flag);
899 return 0;
900}
d30cd123 901EXPORT_SYMBOL(se_dev_set_emulate_tpu);
c66ac9db
NB		 902
903int se_dev_set_emulate_tpws(struct se_device *dev, int flag)
904{
905 if ((flag != 0) && (flag != 1)) {
6708bb27 906 pr_err("Illegal value %d\n", flag);
e3d6f909 907 return -EINVAL;
c66ac9db
NB		 908 }
909 /*
910 * We expect this value to be non-zero when generic Block Layer
911 * Discard supported is detected iblock_create_virtdevice().
912 */
0fd97ccf 913 if (flag && !dev->dev_attrib.max_unmap_block_desc_count) {
6708bb27 914 pr_err("Generic Block Discard not supported\n");
c66ac9db
NB		 915 return -ENOSYS;
916 }
917
0fd97ccf 918 dev->dev_attrib.emulate_tpws = flag;
6708bb27 919 pr_debug("dev[%p]: SE Device Thin Provisioning WRITE_SAME: %d\n",
c66ac9db
NB		 920 dev, flag);
921 return 0;
922}
d30cd123 923EXPORT_SYMBOL(se_dev_set_emulate_tpws);
c66ac9db 924
0123a9ec
NB		 925int se_dev_set_emulate_caw(struct se_device *dev, int flag)
926{
927 if (flag != 0 && flag != 1) {
928 pr_err("Illegal value %d\n", flag);
929 return -EINVAL;
930 }
931 dev->dev_attrib.emulate_caw = flag;
932 pr_debug("dev[%p]: SE Device CompareAndWrite (AtomicTestandSet): %d\n",
933 dev, flag);
934
935 return 0;
936}
d30cd123 937EXPORT_SYMBOL(se_dev_set_emulate_caw);
0123a9ec 938
d397a445
NB		 939int se_dev_set_emulate_3pc(struct se_device *dev, int flag)
940{
941 if (flag != 0 && flag != 1) {
942 pr_err("Illegal value %d\n", flag);
943 return -EINVAL;
944 }
945 dev->dev_attrib.emulate_3pc = flag;
946 pr_debug("dev[%p]: SE Device 3rd Party Copy (EXTENDED_COPY): %d\n",
947 dev, flag);
948
949 return 0;
950}
d30cd123 951EXPORT_SYMBOL(se_dev_set_emulate_3pc);
d397a445 952
2ed22c9c
NB		 953int se_dev_set_pi_prot_type(struct se_device *dev, int flag)
954{
955 int rc, old_prot = dev->dev_attrib.pi_prot_type;
956
957 if (flag != 0 && flag != 1 && flag != 2 && flag != 3) {
958 pr_err("Illegal value %d for pi_prot_type\n", flag);
959 return -EINVAL;
960 }
961 if (flag == 2) {
962 pr_err("DIF TYPE2 protection currently not supported\n");
963 return -ENOSYS;
964 }
965 if (dev->dev_attrib.hw_pi_prot_type) {
966 pr_warn("DIF protection enabled on underlying hardware,"
967 " ignoring\n");
968 return 0;
969 }
970 if (!dev->transport->init_prot || !dev->transport->free_prot) {
448ba904
AG		 971 /* 0 is only allowed value for non-supporting backends */
972 if (flag == 0)
973 return 0;
974
2ed22c9c
NB		 975 pr_err("DIF protection not supported by backend: %s\n",
976 dev->transport->name);
977 return -ENOSYS;
978 }
979 if (!(dev->dev_flags & DF_CONFIGURED)) {
980 pr_err("DIF protection requires device to be configured\n");
981 return -ENODEV;
982 }
983 if (dev->export_count) {
984 pr_err("dev[%p]: Unable to change SE Device PROT type while"
985 " export_count is %d\n", dev, dev->export_count);
986 return -EINVAL;
987 }
988
989 dev->dev_attrib.pi_prot_type = flag;
990
991 if (flag && !old_prot) {
992 rc = dev->transport->init_prot(dev);
993 if (rc) {
994 dev->dev_attrib.pi_prot_type = old_prot;
995 return rc;
996 }
997
998 } else if (!flag && old_prot) {
999 dev->transport->free_prot(dev);
1000 }
1001 pr_debug("dev[%p]: SE Device Protection Type: %d\n", dev, flag);
1002
1003 return 0;
1004}
d30cd123 1005EXPORT_SYMBOL(se_dev_set_pi_prot_type);
2ed22c9c
NB		 1006
1007int se_dev_set_pi_prot_format(struct se_device *dev, int flag)
1008{
1009 int rc;
1010
1011 if (!flag)
1012 return 0;
1013
1014 if (flag != 1) {
1015 pr_err("Illegal value %d for pi_prot_format\n", flag);
1016 return -EINVAL;
1017 }
1018 if (!dev->transport->format_prot) {
1019 pr_err("DIF protection format not supported by backend %s\n",
1020 dev->transport->name);
1021 return -ENOSYS;
1022 }
1023 if (!(dev->dev_flags & DF_CONFIGURED)) {
1024 pr_err("DIF protection format requires device to be configured\n");
1025 return -ENODEV;
1026 }
1027 if (dev->export_count) {
1028 pr_err("dev[%p]: Unable to format SE Device PROT type while"
1029 " export_count is %d\n", dev, dev->export_count);
1030 return -EINVAL;
1031 }
1032
1033 rc = dev->transport->format_prot(dev);
1034 if (rc)
1035 return rc;
1036
1037 pr_debug("dev[%p]: SE Device Protection Format complete\n", dev);
1038
1039 return 0;
1040}
d30cd123 1041EXPORT_SYMBOL(se_dev_set_pi_prot_format);
2ed22c9c 1042
c66ac9db
NB		 1043int se_dev_set_enforce_pr_isids(struct se_device *dev, int flag)
1044{
1045 if ((flag != 0) && (flag != 1)) {
6708bb27 1046 pr_err("Illegal value %d\n", flag);
e3d6f909 1047 return -EINVAL;
c66ac9db 1048 }
0fd97ccf 1049 dev->dev_attrib.enforce_pr_isids = flag;
6708bb27 1050 pr_debug("dev[%p]: SE Device enforce_pr_isids bit: %s\n", dev,
0fd97ccf 1051 (dev->dev_attrib.enforce_pr_isids) ? "Enabled" : "Disabled");
c66ac9db
NB		 1052 return 0;
1053}
d30cd123 1054EXPORT_SYMBOL(se_dev_set_enforce_pr_isids);
c66ac9db 1055
92404e60
NB		 1056int se_dev_set_force_pr_aptpl(struct se_device *dev, int flag)
1057{
1058 if ((flag != 0) && (flag != 1)) {
1059 printk(KERN_ERR "Illegal value %d\n", flag);
1060 return -EINVAL;
1061 }
1062 if (dev->export_count) {
1063 pr_err("dev[%p]: Unable to set force_pr_aptpl while"
1064 " export_count is %d\n", dev, dev->export_count);
1065 return -EINVAL;
1066 }
1067
1068 dev->dev_attrib.force_pr_aptpl = flag;
1069 pr_debug("dev[%p]: SE Device force_pr_aptpl: %d\n", dev, flag);
1070 return 0;
1071}
d30cd123 1072EXPORT_SYMBOL(se_dev_set_force_pr_aptpl);
92404e60 1073
e22a7f07
RD		 1074int se_dev_set_is_nonrot(struct se_device *dev, int flag)
1075{
1076 if ((flag != 0) && (flag != 1)) {
1077 printk(KERN_ERR "Illegal value %d\n", flag);
1078 return -EINVAL;
1079 }
0fd97ccf 1080 dev->dev_attrib.is_nonrot = flag;
5de619a3 1081 pr_debug("dev[%p]: SE Device is_nonrot bit: %d\n",
e22a7f07
RD		 1082 dev, flag);
1083 return 0;
1084}
d30cd123 1085EXPORT_SYMBOL(se_dev_set_is_nonrot);
e22a7f07 1086
5de619a3
NB		 1087int se_dev_set_emulate_rest_reord(struct se_device *dev, int flag)
1088{
1089 if (flag != 0) {
1090 printk(KERN_ERR "dev[%p]: SE Device emulatation of restricted"
1091 " reordering not implemented\n", dev);
1092 return -ENOSYS;
1093 }
0fd97ccf 1094 dev->dev_attrib.emulate_rest_reord = flag;
5de619a3
NB		 1095 pr_debug("dev[%p]: SE Device emulate_rest_reord: %d\n", dev, flag);
1096 return 0;
1097}
d30cd123 1098EXPORT_SYMBOL(se_dev_set_emulate_rest_reord);
5de619a3 1099
c66ac9db
NB		 1100/*
1101 * Note, this can only be called on unexported SE Device Object.
1102 */
1103int se_dev_set_queue_depth(struct se_device *dev, u32 queue_depth)
1104{
0fd97ccf 1105 if (dev->export_count) {
6708bb27 1106 pr_err("dev[%p]: Unable to change SE Device TCQ while"
0fd97ccf
CH		 1107 " export_count is %d\n",
1108 dev, dev->export_count);
e3d6f909 1109 return -EINVAL;
c66ac9db 1110 }
6708bb27
AG		 1111 if (!queue_depth) {
1112 pr_err("dev[%p]: Illegal ZERO value for queue"
c66ac9db 1113 "_depth\n", dev);
e3d6f909 1114 return -EINVAL;
c66ac9db
NB		 1115 }
1116
4b2f57e5 1117 if (queue_depth > dev->dev_attrib.queue_depth) {
0fd97ccf 1118 if (queue_depth > dev->dev_attrib.hw_queue_depth) {
4b2f57e5
NB		 1119 pr_err("dev[%p]: Passed queue_depth:"
1120 " %u exceeds TCM/SE_Device MAX"
1121 " TCQ: %u\n", dev, queue_depth,
0fd97ccf 1122 dev->dev_attrib.hw_queue_depth);
e3d6f909 1123 return -EINVAL;
c66ac9db 1124 }
c66ac9db 1125 }
0fd97ccf 1126 dev->dev_attrib.queue_depth = dev->queue_depth = queue_depth;
6708bb27 1127 pr_debug("dev[%p]: SE Device TCQ Depth changed to: %u\n",
c66ac9db
NB		 1128 dev, queue_depth);
1129 return 0;
1130}
d30cd123 1131EXPORT_SYMBOL(se_dev_set_queue_depth);
c66ac9db 1132
c66ac9db
NB		 1133int se_dev_set_optimal_sectors(struct se_device *dev, u32 optimal_sectors)
1134{
0fd97ccf 1135 if (dev->export_count) {
6708bb27 1136 pr_err("dev[%p]: Unable to change SE Device"
0fd97ccf
CH		 1137 " optimal_sectors while export_count is %d\n",
1138 dev, dev->export_count);
c66ac9db
NB		 1139 return -EINVAL;
1140 }
046ba642 1141 if (optimal_sectors > dev->dev_attrib.hw_max_sectors) {
6708bb27 1142 pr_err("dev[%p]: Passed optimal_sectors %u cannot be"
046ba642
NB		 1143 " greater than hw_max_sectors: %u\n", dev,
1144 optimal_sectors, dev->dev_attrib.hw_max_sectors);
c66ac9db
NB		 1145 return -EINVAL;
1146 }
1147
0fd97ccf 1148 dev->dev_attrib.optimal_sectors = optimal_sectors;
6708bb27 1149 pr_debug("dev[%p]: SE Device optimal_sectors changed to %u\n",
c66ac9db
NB		 1150 dev, optimal_sectors);
1151 return 0;
1152}
d30cd123 1153EXPORT_SYMBOL(se_dev_set_optimal_sectors);
c66ac9db
NB		 1154
1155int se_dev_set_block_size(struct se_device *dev, u32 block_size)
1156{
0fd97ccf 1157 if (dev->export_count) {
6708bb27 1158 pr_err("dev[%p]: Unable to change SE Device block_size"
0fd97ccf
CH		 1159 " while export_count is %d\n",
1160 dev, dev->export_count);
e3d6f909 1161 return -EINVAL;
c66ac9db
NB		 1162 }
1163
1164 if ((block_size != 512) &&
1165 (block_size != 1024) &&
1166 (block_size != 2048) &&
1167 (block_size != 4096)) {
6708bb27 1168 pr_err("dev[%p]: Illegal value for block_device: %u"
c66ac9db
NB		 1169 " for SE device, must be 512, 1024, 2048 or 4096\n",
1170 dev, block_size);
e3d6f909 1171 return -EINVAL;
c66ac9db
NB		 1172 }
1173
0fd97ccf 1174 dev->dev_attrib.block_size = block_size;
6708bb27 1175 pr_debug("dev[%p]: SE Device block_size changed to %u\n",
c66ac9db 1176 dev, block_size);
95cadace
NB		 1177
1178 if (dev->dev_attrib.max_bytes_per_io)
1179 dev->dev_attrib.hw_max_sectors =
1180 dev->dev_attrib.max_bytes_per_io / block_size;
1181
c66ac9db
NB		 1182 return 0;
1183}
d30cd123 1184EXPORT_SYMBOL(se_dev_set_block_size);
c66ac9db
NB		 1185
1186struct se_lun *core_dev_add_lun(
1187 struct se_portal_group *tpg,
c66ac9db 1188 struct se_device *dev,
2af7973a 1189 u32 unpacked_lun)
c66ac9db 1190{
2af7973a 1191 struct se_lun *lun;
8d9efe53 1192 int rc;
c66ac9db 1193
d344f8a1 1194 lun = core_tpg_alloc_lun(tpg, unpacked_lun);
2af7973a
AG		 1195 if (IS_ERR(lun))
1196 return lun;
c66ac9db 1197
d344f8a1 1198 rc = core_tpg_add_lun(tpg, lun,
58d92618 1199 TRANSPORT_LUNFLAGS_READ_WRITE, dev);
8d9efe53
SAS		 1200 if (rc < 0)
1201 return ERR_PTR(rc);
c66ac9db 1202
6708bb27 1203 pr_debug("%s_TPG[%u]_LUN[%u] - Activated %s Logical Unit from"
e3d6f909 1204 " CORE HBA: %u\n", tpg->se_tpg_tfo->get_fabric_name(),
2af7973a 1205 tpg->se_tpg_tfo->tpg_get_tag(tpg), lun->unpacked_lun,
2dca673b 1206 tpg->se_tpg_tfo->get_fabric_name(), dev->se_hba->hba_id);
c66ac9db
NB		 1207 /*
1208 * Update LUN maps for dynamically added initiators when
1209 * generate_node_acl is enabled.
1210 */
e3d6f909 1211 if (tpg->se_tpg_tfo->tpg_check_demo_mode(tpg)) {
c66ac9db 1212 struct se_node_acl *acl;
28638887 1213 spin_lock_irq(&tpg->acl_node_lock);
c66ac9db 1214 list_for_each_entry(acl, &tpg->acl_node_list, acl_list) {
052605c6
NB		 1215 if (acl->dynamic_node_acl &&
1216 (!tpg->se_tpg_tfo->tpg_check_demo_mode_login_only ||
1217 !tpg->se_tpg_tfo->tpg_check_demo_mode_login_only(tpg))) {
28638887 1218 spin_unlock_irq(&tpg->acl_node_lock);
c66ac9db 1219 core_tpg_add_node_to_devs(acl, tpg);
28638887 1220 spin_lock_irq(&tpg->acl_node_lock);
c66ac9db
NB		 1221 }
1222 }
28638887 1223 spin_unlock_irq(&tpg->acl_node_lock);
c66ac9db
NB		 1224 }
1225
2af7973a 1226 return lun;
c66ac9db
NB		 1227}
1228
1229/* core_dev_del_lun():
1230 *
1231 *
1232 */
cd9d7cba 1233void core_dev_del_lun(
c66ac9db 1234 struct se_portal_group *tpg,
cd9d7cba 1235 struct se_lun *lun)
c66ac9db 1236{
cd9d7cba 1237 pr_debug("%s_TPG[%u]_LUN[%u] - Deactivating %s Logical Unit from"
e3d6f909 1238 " device object\n", tpg->se_tpg_tfo->get_fabric_name(),
cd9d7cba 1239 tpg->se_tpg_tfo->tpg_get_tag(tpg), lun->unpacked_lun,
e3d6f909 1240 tpg->se_tpg_tfo->get_fabric_name());
c66ac9db 1241
cd9d7cba 1242 core_tpg_remove_lun(tpg, lun);
c66ac9db
NB		 1243}
1244
1245struct se_lun *core_get_lun_from_tpg(struct se_portal_group *tpg, u32 unpacked_lun)
1246{
1247 struct se_lun *lun;
1248
1249 spin_lock(&tpg->tpg_lun_lock);
1250 if (unpacked_lun > (TRANSPORT_MAX_LUNS_PER_TPG-1)) {
6708bb27 1251 pr_err("%s LUN: %u exceeds TRANSPORT_MAX_LUNS"
c66ac9db 1252 "_PER_TPG-1: %u for Target Portal Group: %hu\n",
e3d6f909 1253 tpg->se_tpg_tfo->get_fabric_name(), unpacked_lun,
c66ac9db 1254 TRANSPORT_MAX_LUNS_PER_TPG-1,
e3d6f909 1255 tpg->se_tpg_tfo->tpg_get_tag(tpg));
c66ac9db
NB		 1256 spin_unlock(&tpg->tpg_lun_lock);
1257 return NULL;
1258 }
4a5a75f3 1259 lun = tpg->tpg_lun_list[unpacked_lun];
c66ac9db
NB		 1260
1261 if (lun->lun_status != TRANSPORT_LUN_STATUS_FREE) {
6708bb27 1262 pr_err("%s Logical Unit Number: %u is not free on"
c66ac9db 1263 " Target Portal Group: %hu, ignoring request.\n",
e3d6f909
AG		 1264 tpg->se_tpg_tfo->get_fabric_name(), unpacked_lun,
1265 tpg->se_tpg_tfo->tpg_get_tag(tpg));
c66ac9db
NB		 1266 spin_unlock(&tpg->tpg_lun_lock);
1267 return NULL;
1268 }
1269 spin_unlock(&tpg->tpg_lun_lock);
1270
1271 return lun;
1272}
1273
1274/* core_dev_get_lun():
1275 *
1276 *
1277 */
1278static struct se_lun *core_dev_get_lun(struct se_portal_group *tpg, u32 unpacked_lun)
1279{
1280 struct se_lun *lun;
1281
1282 spin_lock(&tpg->tpg_lun_lock);
1283 if (unpacked_lun > (TRANSPORT_MAX_LUNS_PER_TPG-1)) {
6708bb27 1284 pr_err("%s LUN: %u exceeds TRANSPORT_MAX_LUNS_PER"
c66ac9db 1285 "_TPG-1: %u for Target Portal Group: %hu\n",
e3d6f909 1286 tpg->se_tpg_tfo->get_fabric_name(), unpacked_lun,
c66ac9db 1287 TRANSPORT_MAX_LUNS_PER_TPG-1,
e3d6f909 1288 tpg->se_tpg_tfo->tpg_get_tag(tpg));
c66ac9db
NB		 1289 spin_unlock(&tpg->tpg_lun_lock);
1290 return NULL;
1291 }
4a5a75f3 1292 lun = tpg->tpg_lun_list[unpacked_lun];
c66ac9db
NB		 1293
1294 if (lun->lun_status != TRANSPORT_LUN_STATUS_ACTIVE) {
6708bb27 1295 pr_err("%s Logical Unit Number: %u is not active on"
c66ac9db 1296 " Target Portal Group: %hu, ignoring request.\n",
e3d6f909
AG		 1297 tpg->se_tpg_tfo->get_fabric_name(), unpacked_lun,
1298 tpg->se_tpg_tfo->tpg_get_tag(tpg));
c66ac9db
NB		 1299 spin_unlock(&tpg->tpg_lun_lock);
1300 return NULL;
1301 }
1302 spin_unlock(&tpg->tpg_lun_lock);
1303
1304 return lun;
1305}
1306
1307struct se_lun_acl *core_dev_init_initiator_node_lun_acl(
1308 struct se_portal_group *tpg,
fcf29481 1309 struct se_node_acl *nacl,
c66ac9db 1310 u32 mapped_lun,
c66ac9db
NB		 1311 int *ret)
1312{
1313 struct se_lun_acl *lacl;
c66ac9db 1314
fcf29481 1315 if (strlen(nacl->initiatorname) >= TRANSPORT_IQN_LEN) {
6708bb27 1316 pr_err("%s InitiatorName exceeds maximum size.\n",
e3d6f909 1317 tpg->se_tpg_tfo->get_fabric_name());
c66ac9db
NB		 1318 *ret = -EOVERFLOW;
1319 return NULL;
1320 }
c66ac9db 1321 lacl = kzalloc(sizeof(struct se_lun_acl), GFP_KERNEL);
6708bb27
AG		 1322 if (!lacl) {
1323 pr_err("Unable to allocate memory for struct se_lun_acl.\n");
c66ac9db
NB		 1324 *ret = -ENOMEM;
1325 return NULL;
1326 }
1327
1328 INIT_LIST_HEAD(&lacl->lacl_list);
1329 lacl->mapped_lun = mapped_lun;
1330 lacl->se_lun_nacl = nacl;
fcf29481
NB		 1331 snprintf(lacl->initiatorname, TRANSPORT_IQN_LEN, "%s",
1332 nacl->initiatorname);
c66ac9db
NB		 1333
1334 return lacl;
1335}
1336
1337int core_dev_add_initiator_node_lun_acl(
1338 struct se_portal_group *tpg,
1339 struct se_lun_acl *lacl,
1340 u32 unpacked_lun,
1341 u32 lun_access)
1342{
1343 struct se_lun *lun;
1344 struct se_node_acl *nacl;
1345
1346 lun = core_dev_get_lun(tpg, unpacked_lun);
6708bb27
AG		 1347 if (!lun) {
1348 pr_err("%s Logical Unit Number: %u is not active on"
c66ac9db 1349 " Target Portal Group: %hu, ignoring request.\n",
e3d6f909
AG		 1350 tpg->se_tpg_tfo->get_fabric_name(), unpacked_lun,
1351 tpg->se_tpg_tfo->tpg_get_tag(tpg));
c66ac9db
NB		 1352 return -EINVAL;
1353 }
1354
1355 nacl = lacl->se_lun_nacl;
6708bb27 1356 if (!nacl)
c66ac9db
NB		 1357 return -EINVAL;
1358
1359 if ((lun->lun_access & TRANSPORT_LUNFLAGS_READ_ONLY) &&
1360 (lun_access & TRANSPORT_LUNFLAGS_READ_WRITE))
1361 lun_access = TRANSPORT_LUNFLAGS_READ_ONLY;
1362
1363 lacl->se_lun = lun;
1364
e80ac6c4
AG		 1365 if (core_enable_device_list_for_node(lun, lacl, lacl->mapped_lun,
1366 lun_access, nacl, tpg) < 0)
c66ac9db
NB		 1367 return -EINVAL;
1368
1369 spin_lock(&lun->lun_acl_lock);
1370 list_add_tail(&lacl->lacl_list, &lun->lun_acl_list);
33940d09 1371 atomic_inc_mb(&lun->lun_acl_count);
c66ac9db
NB		 1372 spin_unlock(&lun->lun_acl_lock);
1373
6708bb27 1374 pr_debug("%s_TPG[%hu]_LUN[%u->%u] - Added %s ACL for "
e3d6f909
AG		 1375 " InitiatorNode: %s\n", tpg->se_tpg_tfo->get_fabric_name(),
1376 tpg->se_tpg_tfo->tpg_get_tag(tpg), unpacked_lun, lacl->mapped_lun,
c66ac9db
NB		 1377 (lun_access & TRANSPORT_LUNFLAGS_READ_WRITE) ? "RW" : "RO",
1378 lacl->initiatorname);
1379 /*
1380 * Check to see if there are any existing persistent reservation APTPL
1381 * pre-registrations that need to be enabled for this LUN ACL..
1382 */
e2480563
NB		 1383 core_scsi3_check_aptpl_registration(lun->lun_se_dev, tpg, lun, nacl,
1384 lacl->mapped_lun);
c66ac9db
NB		 1385 return 0;
1386}
1387
1388/* core_dev_del_initiator_node_lun_acl():
1389 *
1390 *
1391 */
1392int core_dev_del_initiator_node_lun_acl(
1393 struct se_portal_group *tpg,
1394 struct se_lun *lun,
1395 struct se_lun_acl *lacl)
1396{
1397 struct se_node_acl *nacl;
1398
1399 nacl = lacl->se_lun_nacl;
6708bb27 1400 if (!nacl)
c66ac9db
NB		 1401 return -EINVAL;
1402
1403 spin_lock(&lun->lun_acl_lock);
1404 list_del(&lacl->lacl_list);
33940d09 1405 atomic_dec_mb(&lun->lun_acl_count);
c66ac9db
NB		 1406 spin_unlock(&lun->lun_acl_lock);
1407
e80ac6c4
AG		 1408 core_disable_device_list_for_node(lun, NULL, lacl->mapped_lun,
1409 TRANSPORT_LUNFLAGS_NO_ACCESS, nacl, tpg);
c66ac9db
NB		 1410
1411 lacl->se_lun = NULL;
1412
6708bb27 1413 pr_debug("%s_TPG[%hu]_LUN[%u] - Removed ACL for"
c66ac9db 1414 " InitiatorNode: %s Mapped LUN: %u\n",
e3d6f909
AG		 1415 tpg->se_tpg_tfo->get_fabric_name(),
1416 tpg->se_tpg_tfo->tpg_get_tag(tpg), lun->unpacked_lun,
c66ac9db
NB		 1417 lacl->initiatorname, lacl->mapped_lun);
1418
1419 return 0;
1420}
1421
1422void core_dev_free_initiator_node_lun_acl(
1423 struct se_portal_group *tpg,
1424 struct se_lun_acl *lacl)
1425{
6708bb27 1426 pr_debug("%s_TPG[%hu] - Freeing ACL for %s InitiatorNode: %s"
e3d6f909
AG		 1427 " Mapped LUN: %u\n", tpg->se_tpg_tfo->get_fabric_name(),
1428 tpg->se_tpg_tfo->tpg_get_tag(tpg),
1429 tpg->se_tpg_tfo->get_fabric_name(),
c66ac9db
NB		 1430 lacl->initiatorname, lacl->mapped_lun);
1431
1432 kfree(lacl);
1433}
1434
0fd97ccf
CH		 1435static void scsi_dump_inquiry(struct se_device *dev)
1436{
1437 struct t10_wwn *wwn = &dev->t10_wwn;
1438 char buf[17];
1439 int i, device_type;
1440 /*
1441 * Print Linux/SCSI style INQUIRY formatting to the kernel ring buffer
1442 */
1443 for (i = 0; i < 8; i++)
1444 if (wwn->vendor[i] >= 0x20)
1445 buf[i] = wwn->vendor[i];
1446 else
1447 buf[i] = ' ';
1448 buf[i] = '\0';
1449 pr_debug(" Vendor: %s\n", buf);
1450
1451 for (i = 0; i < 16; i++)
1452 if (wwn->model[i] >= 0x20)
1453 buf[i] = wwn->model[i];
1454 else
1455 buf[i] = ' ';
1456 buf[i] = '\0';
1457 pr_debug(" Model: %s\n", buf);
1458
1459 for (i = 0; i < 4; i++)
1460 if (wwn->revision[i] >= 0x20)
1461 buf[i] = wwn->revision[i];
1462 else
1463 buf[i] = ' ';
1464 buf[i] = '\0';
1465 pr_debug(" Revision: %s\n", buf);
1466
1467 device_type = dev->transport->get_device_type(dev);
1468 pr_debug(" Type: %s ", scsi_device_type(device_type));
0fd97ccf
CH		 1469}
1470
1471struct se_device *target_alloc_device(struct se_hba *hba, const char *name)
1472{
1473 struct se_device *dev;
4863e525 1474 struct se_lun *xcopy_lun;
0fd97ccf
CH		 1475
1476 dev = hba->transport->alloc_device(hba, name);
1477 if (!dev)
1478 return NULL;
1479
0ff87549 1480 dev->dev_link_magic = SE_DEV_LINK_MAGIC;
0fd97ccf
CH		 1481 dev->se_hba = hba;
1482 dev->transport = hba->transport;
2ed22c9c 1483 dev->prot_length = sizeof(struct se_dif_v1_tuple);
0fd97ccf
CH		 1484
1485 INIT_LIST_HEAD(&dev->dev_list);
1486 INIT_LIST_HEAD(&dev->dev_sep_list);
1487 INIT_LIST_HEAD(&dev->dev_tmr_list);
1488 INIT_LIST_HEAD(&dev->delayed_cmd_list);
1489 INIT_LIST_HEAD(&dev->state_list);
1490 INIT_LIST_HEAD(&dev->qf_cmd_list);
d9ea32bf 1491 INIT_LIST_HEAD(&dev->g_dev_node);
0fd97ccf
CH		 1492 spin_lock_init(&dev->execute_task_lock);
1493 spin_lock_init(&dev->delayed_cmd_lock);
1494 spin_lock_init(&dev->dev_reservation_lock);
1495 spin_lock_init(&dev->se_port_lock);
1496 spin_lock_init(&dev->se_tmr_lock);
1497 spin_lock_init(&dev->qf_cmd_lock);
68ff9b9b 1498 sema_init(&dev->caw_sem, 1);
0fd97ccf
CH		 1499 atomic_set(&dev->dev_ordered_id, 0);
1500 INIT_LIST_HEAD(&dev->t10_wwn.t10_vpd_list);
1501 spin_lock_init(&dev->t10_wwn.t10_vpd_lock);
1502 INIT_LIST_HEAD(&dev->t10_pr.registration_list);
1503 INIT_LIST_HEAD(&dev->t10_pr.aptpl_reg_list);
1504 spin_lock_init(&dev->t10_pr.registration_lock);
1505 spin_lock_init(&dev->t10_pr.aptpl_reg_lock);
1506 INIT_LIST_HEAD(&dev->t10_alua.tg_pt_gps_list);
1507 spin_lock_init(&dev->t10_alua.tg_pt_gps_lock);
c66094bf
HR		 1508 INIT_LIST_HEAD(&dev->t10_alua.lba_map_list);
1509 spin_lock_init(&dev->t10_alua.lba_map_lock);
0fd97ccf 1510
0fd97ccf
CH		 1511 dev->t10_wwn.t10_dev = dev;
1512 dev->t10_alua.t10_dev = dev;
1513
1514 dev->dev_attrib.da_dev = dev;
adfa9570 1515 dev->dev_attrib.emulate_model_alias = DA_EMULATE_MODEL_ALIAS;
0fd97ccf
CH		 1516 dev->dev_attrib.emulate_dpo = DA_EMULATE_DPO;
1517 dev->dev_attrib.emulate_fua_write = DA_EMULATE_FUA_WRITE;
1518 dev->dev_attrib.emulate_fua_read = DA_EMULATE_FUA_READ;
1519 dev->dev_attrib.emulate_write_cache = DA_EMULATE_WRITE_CACHE;
1520 dev->dev_attrib.emulate_ua_intlck_ctrl = DA_EMULATE_UA_INTLLCK_CTRL;
1521 dev->dev_attrib.emulate_tas = DA_EMULATE_TAS;
1522 dev->dev_attrib.emulate_tpu = DA_EMULATE_TPU;
1523 dev->dev_attrib.emulate_tpws = DA_EMULATE_TPWS;
0123a9ec 1524 dev->dev_attrib.emulate_caw = DA_EMULATE_CAW;
d397a445 1525 dev->dev_attrib.emulate_3pc = DA_EMULATE_3PC;
2ed22c9c 1526 dev->dev_attrib.pi_prot_type = TARGET_DIF_TYPE0_PROT;
0fd97ccf 1527 dev->dev_attrib.enforce_pr_isids = DA_ENFORCE_PR_ISIDS;
92404e60 1528 dev->dev_attrib.force_pr_aptpl = DA_FORCE_PR_APTPL;
0fd97ccf
CH		 1529 dev->dev_attrib.is_nonrot = DA_IS_NONROT;
1530 dev->dev_attrib.emulate_rest_reord = DA_EMULATE_REST_REORD;
1531 dev->dev_attrib.max_unmap_lba_count = DA_MAX_UNMAP_LBA_COUNT;
1532 dev->dev_attrib.max_unmap_block_desc_count =
1533 DA_MAX_UNMAP_BLOCK_DESC_COUNT;
1534 dev->dev_attrib.unmap_granularity = DA_UNMAP_GRANULARITY_DEFAULT;
1535 dev->dev_attrib.unmap_granularity_alignment =
1536 DA_UNMAP_GRANULARITY_ALIGNMENT_DEFAULT;
773cbaf7 1537 dev->dev_attrib.max_write_same_len = DA_MAX_WRITE_SAME_LEN;
0fd97ccf 1538
4863e525
NB		 1539 xcopy_lun = &dev->xcopy_lun;
1540 xcopy_lun->lun_se_dev = dev;
1541 init_completion(&xcopy_lun->lun_shutdown_comp);
1542 INIT_LIST_HEAD(&xcopy_lun->lun_acl_list);
1543 spin_lock_init(&xcopy_lun->lun_acl_lock);
1544 spin_lock_init(&xcopy_lun->lun_sep_lock);
1545 init_completion(&xcopy_lun->lun_ref_comp);
1546
0fd97ccf
CH		 1547 return dev;
1548}
1549
1550int target_configure_device(struct se_device *dev)
1551{
1552 struct se_hba *hba = dev->se_hba;
1553 int ret;
1554
1555 if (dev->dev_flags & DF_CONFIGURED) {
1556 pr_err("se_dev->se_dev_ptr already set for storage"
1557 " object\n");
1558 return -EEXIST;
1559 }
1560
1561 ret = dev->transport->configure_device(dev);
1562 if (ret)
1563 goto out;
0fd97ccf
CH		 1564 /*
1565 * XXX: there is not much point to have two different values here..
1566 */
1567 dev->dev_attrib.block_size = dev->dev_attrib.hw_block_size;
1568 dev->dev_attrib.queue_depth = dev->dev_attrib.hw_queue_depth;
1569
1570 /*
1571 * Align max_hw_sectors down to PAGE_SIZE I/O transfers
1572 */
1573 dev->dev_attrib.hw_max_sectors =
1574 se_dev_align_max_sectors(dev->dev_attrib.hw_max_sectors,
1575 dev->dev_attrib.hw_block_size);
046ba642 1576 dev->dev_attrib.optimal_sectors = dev->dev_attrib.hw_max_sectors;
0fd97ccf
CH		 1577
1578 dev->dev_index = scsi_get_new_index(SCSI_DEVICE_INDEX);
1579 dev->creation_time = get_jiffies_64();
1580
0fd97ccf
CH		 1581 ret = core_setup_alua(dev);
1582 if (ret)
1583 goto out;
1584
1585 /*
1586 * Startup the struct se_device processing thread
1587 */
1588 dev->tmr_wq = alloc_workqueue("tmr-%s", WQ_MEM_RECLAIM | WQ_UNBOUND, 1,
1589 dev->transport->name);
1590 if (!dev->tmr_wq) {
1591 pr_err("Unable to create tmr workqueue for %s\n",
1592 dev->transport->name);
1593 ret = -ENOMEM;
1594 goto out_free_alua;
1595 }
1596
1597 /*
1598 * Setup work_queue for QUEUE_FULL
1599 */
1600 INIT_WORK(&dev->qf_work_queue, target_qf_do_work);
1601
1602 /*
1603 * Preload the initial INQUIRY const values if we are doing
1604 * anything virtual (IBLOCK, FILEIO, RAMDISK), but not for TCM/pSCSI
1605 * passthrough because this is being provided by the backend LLD.
1606 */
a3541703 1607 if (!(dev->transport->transport_flags & TRANSPORT_FLAG_PASSTHROUGH)) {
0fd97ccf
CH		 1608 strncpy(&dev->t10_wwn.vendor[0], "LIO-ORG", 8);
1609 strncpy(&dev->t10_wwn.model[0],
1610 dev->transport->inquiry_prod, 16);
1611 strncpy(&dev->t10_wwn.revision[0],
1612 dev->transport->inquiry_rev, 4);
1613 }
1614
1615 scsi_dump_inquiry(dev);
1616
1617 spin_lock(&hba->device_lock);
1618 hba->dev_count++;
1619 spin_unlock(&hba->device_lock);
d9ea32bf
NB		 1620
1621 mutex_lock(&g_device_mutex);
1622 list_add_tail(&dev->g_dev_node, &g_device_list);
1623 mutex_unlock(&g_device_mutex);
1624
5f7da044
NB		 1625 dev->dev_flags |= DF_CONFIGURED;
1626
0fd97ccf
CH		 1627 return 0;
1628
1629out_free_alua:
1630 core_alua_free_lu_gp_mem(dev);
1631out:
1632 se_release_vpd_for_dev(dev);
1633 return ret;
1634}
1635
1636void target_free_device(struct se_device *dev)
1637{
1638 struct se_hba *hba = dev->se_hba;
1639
1640 WARN_ON(!list_empty(&dev->dev_sep_list));
1641
1642 if (dev->dev_flags & DF_CONFIGURED) {
1643 destroy_workqueue(dev->tmr_wq);
1644
d9ea32bf
NB		 1645 mutex_lock(&g_device_mutex);
1646 list_del(&dev->g_dev_node);
1647 mutex_unlock(&g_device_mutex);
1648
0fd97ccf
CH		 1649 spin_lock(&hba->device_lock);
1650 hba->dev_count--;
1651 spin_unlock(&hba->device_lock);
1652 }
1653
1654 core_alua_free_lu_gp_mem(dev);
229d4f11 1655 core_alua_set_lba_map(dev, NULL, 0, 0);
0fd97ccf
CH		 1656 core_scsi3_free_all_registrations(dev);
1657 se_release_vpd_for_dev(dev);
1658
2ed22c9c
NB		 1659 if (dev->transport->free_prot)
1660 dev->transport->free_prot(dev);
1661
0fd97ccf
CH		 1662 dev->transport->free_device(dev);
1663}
1664
c66ac9db
NB		 1665int core_dev_setup_virtual_lun0(void)
1666{
1667 struct se_hba *hba;
1668 struct se_device *dev;
db5d1c3c 1669 char buf[] = "rd_pages=8,rd_nullio=1";
c66ac9db
NB		 1670 int ret;
1671
6708bb27 1672 hba = core_alloc_hba("rd_mcp", 0, HBA_FLAGS_INTERNAL_USE);
c66ac9db
NB		 1673 if (IS_ERR(hba))
1674 return PTR_ERR(hba);
1675
0fd97ccf
CH		 1676 dev = target_alloc_device(hba, "virt_lun0");
1677 if (!dev) {
c66ac9db 1678 ret = -ENOMEM;
0fd97ccf 1679 goto out_free_hba;
c66ac9db 1680 }
c66ac9db 1681
0fd97ccf 1682 hba->transport->set_configfs_dev_params(dev, buf, sizeof(buf));
c66ac9db 1683
0fd97ccf
CH		 1684 ret = target_configure_device(dev);
1685 if (ret)
1686 goto out_free_se_dev;
c66ac9db 1687
0fd97ccf
CH		 1688 lun0_hba = hba;
1689 g_lun0_dev = dev;
c66ac9db 1690 return 0;
0fd97ccf
CH		 1691
1692out_free_se_dev:
1693 target_free_device(dev);
1694out_free_hba:
1695 core_delete_hba(hba);
c66ac9db
NB		 1696 return ret;
1697}
1698
1699
1700void core_dev_release_virtual_lun0(void)
1701{
e3d6f909 1702 struct se_hba *hba = lun0_hba;
c66ac9db 1703
6708bb27 1704 if (!hba)
c66ac9db
NB		 1705 return;
1706
e3d6f909 1707 if (g_lun0_dev)
0fd97ccf 1708 target_free_device(g_lun0_dev);
c66ac9db
NB		 1709 core_delete_hba(hba);
1710}
7bfea53b
AG		 1711
1712/*
1713 * Common CDB parsing for kernel and user passthrough.
1714 */
1715sense_reason_t
1716passthrough_parse_cdb(struct se_cmd *cmd,
1717 sense_reason_t (*exec_cmd)(struct se_cmd *cmd))
1718{
1719 unsigned char *cdb = cmd->t_task_cdb;
1720
1721 /*
1722 * Clear a lun set in the cdb if the initiator talking to use spoke
1723 * and old standards version, as we can't assume the underlying device
1724 * won't choke up on it.
1725 */
1726 switch (cdb[0]) {
1727 case READ_10: /* SBC - RDProtect */
1728 case READ_12: /* SBC - RDProtect */
1729 case READ_16: /* SBC - RDProtect */
1730 case SEND_DIAGNOSTIC: /* SPC - SELF-TEST Code */
1731 case VERIFY: /* SBC - VRProtect */
1732 case VERIFY_16: /* SBC - VRProtect */
1733 case WRITE_VERIFY: /* SBC - VRProtect */
1734 case WRITE_VERIFY_12: /* SBC - VRProtect */
1735 case MAINTENANCE_IN: /* SPC - Parameter Data Format for SA RTPG */
1736 break;
1737 default:
1738 cdb[1] &= 0x1f; /* clear logical unit number */
1739 break;
1740 }
1741
1742 /*
1743 * For REPORT LUNS we always need to emulate the response, for everything
1744 * else, pass it up.
1745 */
1746 if (cdb[0] == REPORT_LUNS) {
1747 cmd->execute_cmd = spc_emulate_report_luns;
1748 return TCM_NO_SENSE;
1749 }
1750
1751 /* Set DATA_CDB flag for ops that should have it */
1752 switch (cdb[0]) {
1753 case READ_6:
1754 case READ_10:
1755 case READ_12:
1756 case READ_16:
1757 case WRITE_6:
1758 case WRITE_10:
1759 case WRITE_12:
1760 case WRITE_16:
1761 case WRITE_VERIFY:
1762 case WRITE_VERIFY_12:
1763 case 0x8e: /* WRITE_VERIFY_16 */
1764 case COMPARE_AND_WRITE:
1765 case XDWRITEREAD_10:
1766 cmd->se_cmd_flags |= SCF_SCSI_DATA_CDB;
1767 break;
1768 case VARIABLE_LENGTH_CMD:
1769 switch (get_unaligned_be16(&cdb[8])) {
1770 case READ_32:
1771 case WRITE_32:
1772 case 0x0c: /* WRITE_VERIFY_32 */
1773 case XDWRITEREAD_32:
1774 cmd->se_cmd_flags |= SCF_SCSI_DATA_CDB;
1775 break;
1776 }
1777 }
1778
1779 cmd->execute_cmd = exec_cmd;
1780
1781 return TCM_NO_SENSE;
1782}
1783EXPORT_SYMBOL(passthrough_parse_cdb);
Linux kernel - Deliverables
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