target_core_device.c 47 KB

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  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. #include <linux/net.h>
  30. #include <linux/string.h>
  31. #include <linux/delay.h>
  32. #include <linux/timer.h>
  33. #include <linux/slab.h>
  34. #include <linux/spinlock.h>
  35. #include <linux/smp_lock.h>
  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. #include <target/target_core_base.h>
  42. #include <target/target_core_device.h>
  43. #include <target/target_core_tpg.h>
  44. #include <target/target_core_transport.h>
  45. #include <target/target_core_fabric_ops.h>
  46. #include "target_core_alua.h"
  47. #include "target_core_hba.h"
  48. #include "target_core_pr.h"
  49. #include "target_core_ua.h"
  50. static void se_dev_start(struct se_device *dev);
  51. static void se_dev_stop(struct se_device *dev);
  52. int transport_get_lun_for_cmd(
  53. struct se_cmd *se_cmd,
  54. unsigned char *cdb,
  55. u32 unpacked_lun)
  56. {
  57. struct se_dev_entry *deve;
  58. struct se_lun *se_lun = NULL;
  59. struct se_session *se_sess = SE_SESS(se_cmd);
  60. unsigned long flags;
  61. int read_only = 0;
  62. spin_lock_irq(&SE_NODE_ACL(se_sess)->device_list_lock);
  63. deve = se_cmd->se_deve =
  64. &SE_NODE_ACL(se_sess)->device_list[unpacked_lun];
  65. if (deve->lun_flags & TRANSPORT_LUNFLAGS_INITIATOR_ACCESS) {
  66. if (se_cmd) {
  67. deve->total_cmds++;
  68. deve->total_bytes += se_cmd->data_length;
  69. if (se_cmd->data_direction == DMA_TO_DEVICE) {
  70. if (deve->lun_flags &
  71. TRANSPORT_LUNFLAGS_READ_ONLY) {
  72. read_only = 1;
  73. goto out;
  74. }
  75. deve->write_bytes += se_cmd->data_length;
  76. } else if (se_cmd->data_direction ==
  77. DMA_FROM_DEVICE) {
  78. deve->read_bytes += se_cmd->data_length;
  79. }
  80. }
  81. deve->deve_cmds++;
  82. se_lun = se_cmd->se_lun = deve->se_lun;
  83. se_cmd->pr_res_key = deve->pr_res_key;
  84. se_cmd->orig_fe_lun = unpacked_lun;
  85. se_cmd->se_orig_obj_ptr = SE_LUN(se_cmd)->lun_se_dev;
  86. se_cmd->se_cmd_flags |= SCF_SE_LUN_CMD;
  87. }
  88. out:
  89. spin_unlock_irq(&SE_NODE_ACL(se_sess)->device_list_lock);
  90. if (!se_lun) {
  91. if (read_only) {
  92. se_cmd->scsi_sense_reason = TCM_WRITE_PROTECTED;
  93. se_cmd->se_cmd_flags |= SCF_SCSI_CDB_EXCEPTION;
  94. printk("TARGET_CORE[%s]: Detected WRITE_PROTECTED LUN"
  95. " Access for 0x%08x\n",
  96. CMD_TFO(se_cmd)->get_fabric_name(),
  97. unpacked_lun);
  98. return -1;
  99. } else {
  100. /*
  101. * Use the se_portal_group->tpg_virt_lun0 to allow for
  102. * REPORT_LUNS, et al to be returned when no active
  103. * MappedLUN=0 exists for this Initiator Port.
  104. */
  105. if (unpacked_lun != 0) {
  106. se_cmd->scsi_sense_reason = TCM_NON_EXISTENT_LUN;
  107. se_cmd->se_cmd_flags |= SCF_SCSI_CDB_EXCEPTION;
  108. printk("TARGET_CORE[%s]: Detected NON_EXISTENT_LUN"
  109. " Access for 0x%08x\n",
  110. CMD_TFO(se_cmd)->get_fabric_name(),
  111. unpacked_lun);
  112. return -1;
  113. }
  114. /*
  115. * Force WRITE PROTECT for virtual LUN 0
  116. */
  117. if ((se_cmd->data_direction != DMA_FROM_DEVICE) &&
  118. (se_cmd->data_direction != DMA_NONE)) {
  119. se_cmd->scsi_sense_reason = TCM_WRITE_PROTECTED;
  120. se_cmd->se_cmd_flags |= SCF_SCSI_CDB_EXCEPTION;
  121. return -1;
  122. }
  123. #if 0
  124. printk("TARGET_CORE[%s]: Using virtual LUN0! :-)\n",
  125. CMD_TFO(se_cmd)->get_fabric_name());
  126. #endif
  127. se_lun = se_cmd->se_lun = &se_sess->se_tpg->tpg_virt_lun0;
  128. se_cmd->orig_fe_lun = 0;
  129. se_cmd->se_orig_obj_ptr = SE_LUN(se_cmd)->lun_se_dev;
  130. se_cmd->se_cmd_flags |= SCF_SE_LUN_CMD;
  131. }
  132. }
  133. /*
  134. * Determine if the struct se_lun is online.
  135. */
  136. /* #warning FIXME: Check for LUN_RESET + UNIT Attention */
  137. if (se_dev_check_online(se_lun->lun_se_dev) != 0) {
  138. se_cmd->scsi_sense_reason = TCM_NON_EXISTENT_LUN;
  139. se_cmd->se_cmd_flags |= SCF_SCSI_CDB_EXCEPTION;
  140. return -1;
  141. }
  142. {
  143. struct se_device *dev = se_lun->lun_se_dev;
  144. spin_lock(&dev->stats_lock);
  145. dev->num_cmds++;
  146. if (se_cmd->data_direction == DMA_TO_DEVICE)
  147. dev->write_bytes += se_cmd->data_length;
  148. else if (se_cmd->data_direction == DMA_FROM_DEVICE)
  149. dev->read_bytes += se_cmd->data_length;
  150. spin_unlock(&dev->stats_lock);
  151. }
  152. /*
  153. * Add the iscsi_cmd_t to the struct se_lun's cmd list. This list is used
  154. * for tracking state of struct se_cmds during LUN shutdown events.
  155. */
  156. spin_lock_irqsave(&se_lun->lun_cmd_lock, flags);
  157. list_add_tail(&se_cmd->se_lun_list, &se_lun->lun_cmd_list);
  158. atomic_set(&T_TASK(se_cmd)->transport_lun_active, 1);
  159. #if 0
  160. printk(KERN_INFO "Adding ITT: 0x%08x to LUN LIST[%d]\n",
  161. CMD_TFO(se_cmd)->get_task_tag(se_cmd), se_lun->unpacked_lun);
  162. #endif
  163. spin_unlock_irqrestore(&se_lun->lun_cmd_lock, flags);
  164. return 0;
  165. }
  166. EXPORT_SYMBOL(transport_get_lun_for_cmd);
  167. int transport_get_lun_for_tmr(
  168. struct se_cmd *se_cmd,
  169. u32 unpacked_lun)
  170. {
  171. struct se_device *dev = NULL;
  172. struct se_dev_entry *deve;
  173. struct se_lun *se_lun = NULL;
  174. struct se_session *se_sess = SE_SESS(se_cmd);
  175. struct se_tmr_req *se_tmr = se_cmd->se_tmr_req;
  176. spin_lock_irq(&SE_NODE_ACL(se_sess)->device_list_lock);
  177. deve = se_cmd->se_deve =
  178. &SE_NODE_ACL(se_sess)->device_list[unpacked_lun];
  179. if (deve->lun_flags & TRANSPORT_LUNFLAGS_INITIATOR_ACCESS) {
  180. se_lun = se_cmd->se_lun = se_tmr->tmr_lun = deve->se_lun;
  181. dev = se_tmr->tmr_dev = se_lun->lun_se_dev;
  182. se_cmd->pr_res_key = deve->pr_res_key;
  183. se_cmd->orig_fe_lun = unpacked_lun;
  184. se_cmd->se_orig_obj_ptr = SE_LUN(se_cmd)->lun_se_dev;
  185. /* se_cmd->se_cmd_flags |= SCF_SE_LUN_CMD; */
  186. }
  187. spin_unlock_irq(&SE_NODE_ACL(se_sess)->device_list_lock);
  188. if (!se_lun) {
  189. printk(KERN_INFO "TARGET_CORE[%s]: Detected NON_EXISTENT_LUN"
  190. " Access for 0x%08x\n",
  191. CMD_TFO(se_cmd)->get_fabric_name(),
  192. unpacked_lun);
  193. se_cmd->se_cmd_flags |= SCF_SCSI_CDB_EXCEPTION;
  194. return -1;
  195. }
  196. /*
  197. * Determine if the struct se_lun is online.
  198. */
  199. /* #warning FIXME: Check for LUN_RESET + UNIT Attention */
  200. if (se_dev_check_online(se_lun->lun_se_dev) != 0) {
  201. se_cmd->se_cmd_flags |= SCF_SCSI_CDB_EXCEPTION;
  202. return -1;
  203. }
  204. spin_lock(&dev->se_tmr_lock);
  205. list_add_tail(&se_tmr->tmr_list, &dev->dev_tmr_list);
  206. spin_unlock(&dev->se_tmr_lock);
  207. return 0;
  208. }
  209. EXPORT_SYMBOL(transport_get_lun_for_tmr);
  210. /*
  211. * This function is called from core_scsi3_emulate_pro_register_and_move()
  212. * and core_scsi3_decode_spec_i_port(), and will increment &deve->pr_ref_count
  213. * when a matching rtpi is found.
  214. */
  215. struct se_dev_entry *core_get_se_deve_from_rtpi(
  216. struct se_node_acl *nacl,
  217. u16 rtpi)
  218. {
  219. struct se_dev_entry *deve;
  220. struct se_lun *lun;
  221. struct se_port *port;
  222. struct se_portal_group *tpg = nacl->se_tpg;
  223. u32 i;
  224. spin_lock_irq(&nacl->device_list_lock);
  225. for (i = 0; i < TRANSPORT_MAX_LUNS_PER_TPG; i++) {
  226. deve = &nacl->device_list[i];
  227. if (!(deve->lun_flags & TRANSPORT_LUNFLAGS_INITIATOR_ACCESS))
  228. continue;
  229. lun = deve->se_lun;
  230. if (!(lun)) {
  231. printk(KERN_ERR "%s device entries device pointer is"
  232. " NULL, but Initiator has access.\n",
  233. TPG_TFO(tpg)->get_fabric_name());
  234. continue;
  235. }
  236. port = lun->lun_sep;
  237. if (!(port)) {
  238. printk(KERN_ERR "%s device entries device pointer is"
  239. " NULL, but Initiator has access.\n",
  240. TPG_TFO(tpg)->get_fabric_name());
  241. continue;
  242. }
  243. if (port->sep_rtpi != rtpi)
  244. continue;
  245. atomic_inc(&deve->pr_ref_count);
  246. smp_mb__after_atomic_inc();
  247. spin_unlock_irq(&nacl->device_list_lock);
  248. return deve;
  249. }
  250. spin_unlock_irq(&nacl->device_list_lock);
  251. return NULL;
  252. }
  253. int core_free_device_list_for_node(
  254. struct se_node_acl *nacl,
  255. struct se_portal_group *tpg)
  256. {
  257. struct se_dev_entry *deve;
  258. struct se_lun *lun;
  259. u32 i;
  260. if (!nacl->device_list)
  261. return 0;
  262. spin_lock_irq(&nacl->device_list_lock);
  263. for (i = 0; i < TRANSPORT_MAX_LUNS_PER_TPG; i++) {
  264. deve = &nacl->device_list[i];
  265. if (!(deve->lun_flags & TRANSPORT_LUNFLAGS_INITIATOR_ACCESS))
  266. continue;
  267. if (!deve->se_lun) {
  268. printk(KERN_ERR "%s device entries device pointer is"
  269. " NULL, but Initiator has access.\n",
  270. TPG_TFO(tpg)->get_fabric_name());
  271. continue;
  272. }
  273. lun = deve->se_lun;
  274. spin_unlock_irq(&nacl->device_list_lock);
  275. core_update_device_list_for_node(lun, NULL, deve->mapped_lun,
  276. TRANSPORT_LUNFLAGS_NO_ACCESS, nacl, tpg, 0);
  277. spin_lock_irq(&nacl->device_list_lock);
  278. }
  279. spin_unlock_irq(&nacl->device_list_lock);
  280. kfree(nacl->device_list);
  281. nacl->device_list = NULL;
  282. return 0;
  283. }
  284. void core_dec_lacl_count(struct se_node_acl *se_nacl, struct se_cmd *se_cmd)
  285. {
  286. struct se_dev_entry *deve;
  287. spin_lock_irq(&se_nacl->device_list_lock);
  288. deve = &se_nacl->device_list[se_cmd->orig_fe_lun];
  289. deve->deve_cmds--;
  290. spin_unlock_irq(&se_nacl->device_list_lock);
  291. return;
  292. }
  293. void core_update_device_list_access(
  294. u32 mapped_lun,
  295. u32 lun_access,
  296. struct se_node_acl *nacl)
  297. {
  298. struct se_dev_entry *deve;
  299. spin_lock_irq(&nacl->device_list_lock);
  300. deve = &nacl->device_list[mapped_lun];
  301. if (lun_access & TRANSPORT_LUNFLAGS_READ_WRITE) {
  302. deve->lun_flags &= ~TRANSPORT_LUNFLAGS_READ_ONLY;
  303. deve->lun_flags |= TRANSPORT_LUNFLAGS_READ_WRITE;
  304. } else {
  305. deve->lun_flags &= ~TRANSPORT_LUNFLAGS_READ_WRITE;
  306. deve->lun_flags |= TRANSPORT_LUNFLAGS_READ_ONLY;
  307. }
  308. spin_unlock_irq(&nacl->device_list_lock);
  309. return;
  310. }
  311. /* core_update_device_list_for_node():
  312. *
  313. *
  314. */
  315. int core_update_device_list_for_node(
  316. struct se_lun *lun,
  317. struct se_lun_acl *lun_acl,
  318. u32 mapped_lun,
  319. u32 lun_access,
  320. struct se_node_acl *nacl,
  321. struct se_portal_group *tpg,
  322. int enable)
  323. {
  324. struct se_port *port = lun->lun_sep;
  325. struct se_dev_entry *deve = &nacl->device_list[mapped_lun];
  326. int trans = 0;
  327. /*
  328. * If the MappedLUN entry is being disabled, the entry in
  329. * port->sep_alua_list must be removed now before clearing the
  330. * struct se_dev_entry pointers below as logic in
  331. * core_alua_do_transition_tg_pt() depends on these being present.
  332. */
  333. if (!(enable)) {
  334. /*
  335. * deve->se_lun_acl will be NULL for demo-mode created LUNs
  336. * that have not been explictly concerted to MappedLUNs ->
  337. * struct se_lun_acl.
  338. */
  339. if (!(deve->se_lun_acl))
  340. return 0;
  341. spin_lock_bh(&port->sep_alua_lock);
  342. list_del(&deve->alua_port_list);
  343. spin_unlock_bh(&port->sep_alua_lock);
  344. }
  345. spin_lock_irq(&nacl->device_list_lock);
  346. if (enable) {
  347. /*
  348. * Check if the call is handling demo mode -> explict LUN ACL
  349. * transition. This transition must be for the same struct se_lun
  350. * + mapped_lun that was setup in demo mode..
  351. */
  352. if (deve->lun_flags & TRANSPORT_LUNFLAGS_INITIATOR_ACCESS) {
  353. if (deve->se_lun_acl != NULL) {
  354. printk(KERN_ERR "struct se_dev_entry->se_lun_acl"
  355. " already set for demo mode -> explict"
  356. " LUN ACL transition\n");
  357. return -1;
  358. }
  359. if (deve->se_lun != lun) {
  360. printk(KERN_ERR "struct se_dev_entry->se_lun does"
  361. " match passed struct se_lun for demo mode"
  362. " -> explict LUN ACL transition\n");
  363. return -1;
  364. }
  365. deve->se_lun_acl = lun_acl;
  366. trans = 1;
  367. } else {
  368. deve->se_lun = lun;
  369. deve->se_lun_acl = lun_acl;
  370. deve->mapped_lun = mapped_lun;
  371. deve->lun_flags |= TRANSPORT_LUNFLAGS_INITIATOR_ACCESS;
  372. }
  373. if (lun_access & TRANSPORT_LUNFLAGS_READ_WRITE) {
  374. deve->lun_flags &= ~TRANSPORT_LUNFLAGS_READ_ONLY;
  375. deve->lun_flags |= TRANSPORT_LUNFLAGS_READ_WRITE;
  376. } else {
  377. deve->lun_flags &= ~TRANSPORT_LUNFLAGS_READ_WRITE;
  378. deve->lun_flags |= TRANSPORT_LUNFLAGS_READ_ONLY;
  379. }
  380. if (trans) {
  381. spin_unlock_irq(&nacl->device_list_lock);
  382. return 0;
  383. }
  384. deve->creation_time = get_jiffies_64();
  385. deve->attach_count++;
  386. spin_unlock_irq(&nacl->device_list_lock);
  387. spin_lock_bh(&port->sep_alua_lock);
  388. list_add_tail(&deve->alua_port_list, &port->sep_alua_list);
  389. spin_unlock_bh(&port->sep_alua_lock);
  390. return 0;
  391. }
  392. /*
  393. * Wait for any in process SPEC_I_PT=1 or REGISTER_AND_MOVE
  394. * PR operation to complete.
  395. */
  396. spin_unlock_irq(&nacl->device_list_lock);
  397. while (atomic_read(&deve->pr_ref_count) != 0)
  398. cpu_relax();
  399. spin_lock_irq(&nacl->device_list_lock);
  400. /*
  401. * Disable struct se_dev_entry LUN ACL mapping
  402. */
  403. core_scsi3_ua_release_all(deve);
  404. deve->se_lun = NULL;
  405. deve->se_lun_acl = NULL;
  406. deve->lun_flags = 0;
  407. deve->creation_time = 0;
  408. deve->attach_count--;
  409. spin_unlock_irq(&nacl->device_list_lock);
  410. core_scsi3_free_pr_reg_from_nacl(lun->lun_se_dev, nacl);
  411. return 0;
  412. }
  413. /* core_clear_lun_from_tpg():
  414. *
  415. *
  416. */
  417. void core_clear_lun_from_tpg(struct se_lun *lun, struct se_portal_group *tpg)
  418. {
  419. struct se_node_acl *nacl;
  420. struct se_dev_entry *deve;
  421. u32 i;
  422. spin_lock_bh(&tpg->acl_node_lock);
  423. list_for_each_entry(nacl, &tpg->acl_node_list, acl_list) {
  424. spin_unlock_bh(&tpg->acl_node_lock);
  425. spin_lock_irq(&nacl->device_list_lock);
  426. for (i = 0; i < TRANSPORT_MAX_LUNS_PER_TPG; i++) {
  427. deve = &nacl->device_list[i];
  428. if (lun != deve->se_lun)
  429. continue;
  430. spin_unlock_irq(&nacl->device_list_lock);
  431. core_update_device_list_for_node(lun, NULL,
  432. deve->mapped_lun, TRANSPORT_LUNFLAGS_NO_ACCESS,
  433. nacl, tpg, 0);
  434. spin_lock_irq(&nacl->device_list_lock);
  435. }
  436. spin_unlock_irq(&nacl->device_list_lock);
  437. spin_lock_bh(&tpg->acl_node_lock);
  438. }
  439. spin_unlock_bh(&tpg->acl_node_lock);
  440. return;
  441. }
  442. static struct se_port *core_alloc_port(struct se_device *dev)
  443. {
  444. struct se_port *port, *port_tmp;
  445. port = kzalloc(sizeof(struct se_port), GFP_KERNEL);
  446. if (!(port)) {
  447. printk(KERN_ERR "Unable to allocate struct se_port\n");
  448. return NULL;
  449. }
  450. INIT_LIST_HEAD(&port->sep_alua_list);
  451. INIT_LIST_HEAD(&port->sep_list);
  452. atomic_set(&port->sep_tg_pt_secondary_offline, 0);
  453. spin_lock_init(&port->sep_alua_lock);
  454. mutex_init(&port->sep_tg_pt_md_mutex);
  455. spin_lock(&dev->se_port_lock);
  456. if (dev->dev_port_count == 0x0000ffff) {
  457. printk(KERN_WARNING "Reached dev->dev_port_count =="
  458. " 0x0000ffff\n");
  459. spin_unlock(&dev->se_port_lock);
  460. return NULL;
  461. }
  462. again:
  463. /*
  464. * Allocate the next RELATIVE TARGET PORT IDENTIFER for this struct se_device
  465. * Here is the table from spc4r17 section 7.7.3.8.
  466. *
  467. * Table 473 -- RELATIVE TARGET PORT IDENTIFIER field
  468. *
  469. * Code Description
  470. * 0h Reserved
  471. * 1h Relative port 1, historically known as port A
  472. * 2h Relative port 2, historically known as port B
  473. * 3h to FFFFh Relative port 3 through 65 535
  474. */
  475. port->sep_rtpi = dev->dev_rpti_counter++;
  476. if (!(port->sep_rtpi))
  477. goto again;
  478. list_for_each_entry(port_tmp, &dev->dev_sep_list, sep_list) {
  479. /*
  480. * Make sure RELATIVE TARGET PORT IDENTIFER is unique
  481. * for 16-bit wrap..
  482. */
  483. if (port->sep_rtpi == port_tmp->sep_rtpi)
  484. goto again;
  485. }
  486. spin_unlock(&dev->se_port_lock);
  487. return port;
  488. }
  489. static void core_export_port(
  490. struct se_device *dev,
  491. struct se_portal_group *tpg,
  492. struct se_port *port,
  493. struct se_lun *lun)
  494. {
  495. struct se_subsystem_dev *su_dev = SU_DEV(dev);
  496. struct t10_alua_tg_pt_gp_member *tg_pt_gp_mem = NULL;
  497. spin_lock(&dev->se_port_lock);
  498. spin_lock(&lun->lun_sep_lock);
  499. port->sep_tpg = tpg;
  500. port->sep_lun = lun;
  501. lun->lun_sep = port;
  502. spin_unlock(&lun->lun_sep_lock);
  503. list_add_tail(&port->sep_list, &dev->dev_sep_list);
  504. spin_unlock(&dev->se_port_lock);
  505. if (T10_ALUA(su_dev)->alua_type == SPC3_ALUA_EMULATED) {
  506. tg_pt_gp_mem = core_alua_allocate_tg_pt_gp_mem(port);
  507. if (IS_ERR(tg_pt_gp_mem) || !tg_pt_gp_mem) {
  508. printk(KERN_ERR "Unable to allocate t10_alua_tg_pt"
  509. "_gp_member_t\n");
  510. return;
  511. }
  512. spin_lock(&tg_pt_gp_mem->tg_pt_gp_mem_lock);
  513. __core_alua_attach_tg_pt_gp_mem(tg_pt_gp_mem,
  514. T10_ALUA(su_dev)->default_tg_pt_gp);
  515. spin_unlock(&tg_pt_gp_mem->tg_pt_gp_mem_lock);
  516. printk(KERN_INFO "%s/%s: Adding to default ALUA Target Port"
  517. " Group: alua/default_tg_pt_gp\n",
  518. TRANSPORT(dev)->name, TPG_TFO(tpg)->get_fabric_name());
  519. }
  520. dev->dev_port_count++;
  521. port->sep_index = port->sep_rtpi; /* RELATIVE TARGET PORT IDENTIFER */
  522. }
  523. /*
  524. * Called with struct se_device->se_port_lock spinlock held.
  525. */
  526. static void core_release_port(struct se_device *dev, struct se_port *port)
  527. {
  528. /*
  529. * Wait for any port reference for PR ALL_TG_PT=1 operation
  530. * to complete in __core_scsi3_alloc_registration()
  531. */
  532. spin_unlock(&dev->se_port_lock);
  533. if (atomic_read(&port->sep_tg_pt_ref_cnt))
  534. cpu_relax();
  535. spin_lock(&dev->se_port_lock);
  536. core_alua_free_tg_pt_gp_mem(port);
  537. list_del(&port->sep_list);
  538. dev->dev_port_count--;
  539. kfree(port);
  540. return;
  541. }
  542. int core_dev_export(
  543. struct se_device *dev,
  544. struct se_portal_group *tpg,
  545. struct se_lun *lun)
  546. {
  547. struct se_port *port;
  548. port = core_alloc_port(dev);
  549. if (!(port))
  550. return -1;
  551. lun->lun_se_dev = dev;
  552. se_dev_start(dev);
  553. atomic_inc(&dev->dev_export_obj.obj_access_count);
  554. core_export_port(dev, tpg, port, lun);
  555. return 0;
  556. }
  557. void core_dev_unexport(
  558. struct se_device *dev,
  559. struct se_portal_group *tpg,
  560. struct se_lun *lun)
  561. {
  562. struct se_port *port = lun->lun_sep;
  563. spin_lock(&lun->lun_sep_lock);
  564. if (lun->lun_se_dev == NULL) {
  565. spin_unlock(&lun->lun_sep_lock);
  566. return;
  567. }
  568. spin_unlock(&lun->lun_sep_lock);
  569. spin_lock(&dev->se_port_lock);
  570. atomic_dec(&dev->dev_export_obj.obj_access_count);
  571. core_release_port(dev, port);
  572. spin_unlock(&dev->se_port_lock);
  573. se_dev_stop(dev);
  574. lun->lun_se_dev = NULL;
  575. }
  576. int transport_core_report_lun_response(struct se_cmd *se_cmd)
  577. {
  578. struct se_dev_entry *deve;
  579. struct se_lun *se_lun;
  580. struct se_session *se_sess = SE_SESS(se_cmd);
  581. struct se_task *se_task;
  582. unsigned char *buf = (unsigned char *)T_TASK(se_cmd)->t_task_buf;
  583. u32 cdb_offset = 0, lun_count = 0, offset = 8;
  584. u64 i, lun;
  585. list_for_each_entry(se_task, &T_TASK(se_cmd)->t_task_list, t_list)
  586. break;
  587. if (!(se_task)) {
  588. printk(KERN_ERR "Unable to locate struct se_task for struct se_cmd\n");
  589. return PYX_TRANSPORT_LU_COMM_FAILURE;
  590. }
  591. /*
  592. * If no struct se_session pointer is present, this struct se_cmd is
  593. * coming via a target_core_mod PASSTHROUGH op, and not through
  594. * a $FABRIC_MOD. In that case, report LUN=0 only.
  595. */
  596. if (!(se_sess)) {
  597. lun = 0;
  598. buf[offset++] = ((lun >> 56) & 0xff);
  599. buf[offset++] = ((lun >> 48) & 0xff);
  600. buf[offset++] = ((lun >> 40) & 0xff);
  601. buf[offset++] = ((lun >> 32) & 0xff);
  602. buf[offset++] = ((lun >> 24) & 0xff);
  603. buf[offset++] = ((lun >> 16) & 0xff);
  604. buf[offset++] = ((lun >> 8) & 0xff);
  605. buf[offset++] = (lun & 0xff);
  606. lun_count = 1;
  607. goto done;
  608. }
  609. spin_lock_irq(&SE_NODE_ACL(se_sess)->device_list_lock);
  610. for (i = 0; i < TRANSPORT_MAX_LUNS_PER_TPG; i++) {
  611. deve = &SE_NODE_ACL(se_sess)->device_list[i];
  612. if (!(deve->lun_flags & TRANSPORT_LUNFLAGS_INITIATOR_ACCESS))
  613. continue;
  614. se_lun = deve->se_lun;
  615. /*
  616. * We determine the correct LUN LIST LENGTH even once we
  617. * have reached the initial allocation length.
  618. * See SPC2-R20 7.19.
  619. */
  620. lun_count++;
  621. if ((cdb_offset + 8) >= se_cmd->data_length)
  622. continue;
  623. lun = cpu_to_be64(CMD_TFO(se_cmd)->pack_lun(deve->mapped_lun));
  624. buf[offset++] = ((lun >> 56) & 0xff);
  625. buf[offset++] = ((lun >> 48) & 0xff);
  626. buf[offset++] = ((lun >> 40) & 0xff);
  627. buf[offset++] = ((lun >> 32) & 0xff);
  628. buf[offset++] = ((lun >> 24) & 0xff);
  629. buf[offset++] = ((lun >> 16) & 0xff);
  630. buf[offset++] = ((lun >> 8) & 0xff);
  631. buf[offset++] = (lun & 0xff);
  632. cdb_offset += 8;
  633. }
  634. spin_unlock_irq(&SE_NODE_ACL(se_sess)->device_list_lock);
  635. /*
  636. * See SPC3 r07, page 159.
  637. */
  638. done:
  639. lun_count *= 8;
  640. buf[0] = ((lun_count >> 24) & 0xff);
  641. buf[1] = ((lun_count >> 16) & 0xff);
  642. buf[2] = ((lun_count >> 8) & 0xff);
  643. buf[3] = (lun_count & 0xff);
  644. return PYX_TRANSPORT_SENT_TO_TRANSPORT;
  645. }
  646. /* se_release_device_for_hba():
  647. *
  648. *
  649. */
  650. void se_release_device_for_hba(struct se_device *dev)
  651. {
  652. struct se_hba *hba = dev->se_hba;
  653. if ((dev->dev_status & TRANSPORT_DEVICE_ACTIVATED) ||
  654. (dev->dev_status & TRANSPORT_DEVICE_DEACTIVATED) ||
  655. (dev->dev_status & TRANSPORT_DEVICE_SHUTDOWN) ||
  656. (dev->dev_status & TRANSPORT_DEVICE_OFFLINE_ACTIVATED) ||
  657. (dev->dev_status & TRANSPORT_DEVICE_OFFLINE_DEACTIVATED))
  658. se_dev_stop(dev);
  659. if (dev->dev_ptr) {
  660. kthread_stop(dev->process_thread);
  661. if (dev->transport->free_device)
  662. dev->transport->free_device(dev->dev_ptr);
  663. }
  664. spin_lock(&hba->device_lock);
  665. list_del(&dev->dev_list);
  666. hba->dev_count--;
  667. spin_unlock(&hba->device_lock);
  668. core_scsi3_free_all_registrations(dev);
  669. se_release_vpd_for_dev(dev);
  670. kfree(dev->dev_status_queue_obj);
  671. kfree(dev->dev_queue_obj);
  672. kfree(dev);
  673. return;
  674. }
  675. void se_release_vpd_for_dev(struct se_device *dev)
  676. {
  677. struct t10_vpd *vpd, *vpd_tmp;
  678. spin_lock(&DEV_T10_WWN(dev)->t10_vpd_lock);
  679. list_for_each_entry_safe(vpd, vpd_tmp,
  680. &DEV_T10_WWN(dev)->t10_vpd_list, vpd_list) {
  681. list_del(&vpd->vpd_list);
  682. kfree(vpd);
  683. }
  684. spin_unlock(&DEV_T10_WWN(dev)->t10_vpd_lock);
  685. return;
  686. }
  687. /*
  688. * Called with struct se_hba->device_lock held.
  689. */
  690. void se_clear_dev_ports(struct se_device *dev)
  691. {
  692. struct se_hba *hba = dev->se_hba;
  693. struct se_lun *lun;
  694. struct se_portal_group *tpg;
  695. struct se_port *sep, *sep_tmp;
  696. spin_lock(&dev->se_port_lock);
  697. list_for_each_entry_safe(sep, sep_tmp, &dev->dev_sep_list, sep_list) {
  698. spin_unlock(&dev->se_port_lock);
  699. spin_unlock(&hba->device_lock);
  700. lun = sep->sep_lun;
  701. tpg = sep->sep_tpg;
  702. spin_lock(&lun->lun_sep_lock);
  703. if (lun->lun_se_dev == NULL) {
  704. spin_unlock(&lun->lun_sep_lock);
  705. continue;
  706. }
  707. spin_unlock(&lun->lun_sep_lock);
  708. core_dev_del_lun(tpg, lun->unpacked_lun);
  709. spin_lock(&hba->device_lock);
  710. spin_lock(&dev->se_port_lock);
  711. }
  712. spin_unlock(&dev->se_port_lock);
  713. return;
  714. }
  715. /* se_free_virtual_device():
  716. *
  717. * Used for IBLOCK, RAMDISK, and FILEIO Transport Drivers.
  718. */
  719. int se_free_virtual_device(struct se_device *dev, struct se_hba *hba)
  720. {
  721. spin_lock(&hba->device_lock);
  722. se_clear_dev_ports(dev);
  723. spin_unlock(&hba->device_lock);
  724. core_alua_free_lu_gp_mem(dev);
  725. se_release_device_for_hba(dev);
  726. return 0;
  727. }
  728. static void se_dev_start(struct se_device *dev)
  729. {
  730. struct se_hba *hba = dev->se_hba;
  731. spin_lock(&hba->device_lock);
  732. atomic_inc(&dev->dev_obj.obj_access_count);
  733. if (atomic_read(&dev->dev_obj.obj_access_count) == 1) {
  734. if (dev->dev_status & TRANSPORT_DEVICE_DEACTIVATED) {
  735. dev->dev_status &= ~TRANSPORT_DEVICE_DEACTIVATED;
  736. dev->dev_status |= TRANSPORT_DEVICE_ACTIVATED;
  737. } else if (dev->dev_status &
  738. TRANSPORT_DEVICE_OFFLINE_DEACTIVATED) {
  739. dev->dev_status &=
  740. ~TRANSPORT_DEVICE_OFFLINE_DEACTIVATED;
  741. dev->dev_status |= TRANSPORT_DEVICE_OFFLINE_ACTIVATED;
  742. }
  743. }
  744. spin_unlock(&hba->device_lock);
  745. }
  746. static void se_dev_stop(struct se_device *dev)
  747. {
  748. struct se_hba *hba = dev->se_hba;
  749. spin_lock(&hba->device_lock);
  750. atomic_dec(&dev->dev_obj.obj_access_count);
  751. if (atomic_read(&dev->dev_obj.obj_access_count) == 0) {
  752. if (dev->dev_status & TRANSPORT_DEVICE_ACTIVATED) {
  753. dev->dev_status &= ~TRANSPORT_DEVICE_ACTIVATED;
  754. dev->dev_status |= TRANSPORT_DEVICE_DEACTIVATED;
  755. } else if (dev->dev_status &
  756. TRANSPORT_DEVICE_OFFLINE_ACTIVATED) {
  757. dev->dev_status &= ~TRANSPORT_DEVICE_OFFLINE_ACTIVATED;
  758. dev->dev_status |= TRANSPORT_DEVICE_OFFLINE_DEACTIVATED;
  759. }
  760. }
  761. spin_unlock(&hba->device_lock);
  762. while (atomic_read(&hba->dev_mib_access_count))
  763. cpu_relax();
  764. }
  765. int se_dev_check_online(struct se_device *dev)
  766. {
  767. int ret;
  768. spin_lock_irq(&dev->dev_status_lock);
  769. ret = ((dev->dev_status & TRANSPORT_DEVICE_ACTIVATED) ||
  770. (dev->dev_status & TRANSPORT_DEVICE_DEACTIVATED)) ? 0 : 1;
  771. spin_unlock_irq(&dev->dev_status_lock);
  772. return ret;
  773. }
  774. int se_dev_check_shutdown(struct se_device *dev)
  775. {
  776. int ret;
  777. spin_lock_irq(&dev->dev_status_lock);
  778. ret = (dev->dev_status & TRANSPORT_DEVICE_SHUTDOWN);
  779. spin_unlock_irq(&dev->dev_status_lock);
  780. return ret;
  781. }
  782. void se_dev_set_default_attribs(
  783. struct se_device *dev,
  784. struct se_dev_limits *dev_limits)
  785. {
  786. struct queue_limits *limits = &dev_limits->limits;
  787. DEV_ATTRIB(dev)->emulate_dpo = DA_EMULATE_DPO;
  788. DEV_ATTRIB(dev)->emulate_fua_write = DA_EMULATE_FUA_WRITE;
  789. DEV_ATTRIB(dev)->emulate_fua_read = DA_EMULATE_FUA_READ;
  790. DEV_ATTRIB(dev)->emulate_write_cache = DA_EMULATE_WRITE_CACHE;
  791. DEV_ATTRIB(dev)->emulate_ua_intlck_ctrl = DA_EMULATE_UA_INTLLCK_CTRL;
  792. DEV_ATTRIB(dev)->emulate_tas = DA_EMULATE_TAS;
  793. DEV_ATTRIB(dev)->emulate_tpu = DA_EMULATE_TPU;
  794. DEV_ATTRIB(dev)->emulate_tpws = DA_EMULATE_TPWS;
  795. DEV_ATTRIB(dev)->emulate_reservations = DA_EMULATE_RESERVATIONS;
  796. DEV_ATTRIB(dev)->emulate_alua = DA_EMULATE_ALUA;
  797. DEV_ATTRIB(dev)->enforce_pr_isids = DA_ENFORCE_PR_ISIDS;
  798. /*
  799. * The TPU=1 and TPWS=1 settings will be set in TCM/IBLOCK
  800. * iblock_create_virtdevice() from struct queue_limits values
  801. * if blk_queue_discard()==1
  802. */
  803. DEV_ATTRIB(dev)->max_unmap_lba_count = DA_MAX_UNMAP_LBA_COUNT;
  804. DEV_ATTRIB(dev)->max_unmap_block_desc_count =
  805. DA_MAX_UNMAP_BLOCK_DESC_COUNT;
  806. DEV_ATTRIB(dev)->unmap_granularity = DA_UNMAP_GRANULARITY_DEFAULT;
  807. DEV_ATTRIB(dev)->unmap_granularity_alignment =
  808. DA_UNMAP_GRANULARITY_ALIGNMENT_DEFAULT;
  809. /*
  810. * block_size is based on subsystem plugin dependent requirements.
  811. */
  812. DEV_ATTRIB(dev)->hw_block_size = limits->logical_block_size;
  813. DEV_ATTRIB(dev)->block_size = limits->logical_block_size;
  814. /*
  815. * max_sectors is based on subsystem plugin dependent requirements.
  816. */
  817. DEV_ATTRIB(dev)->hw_max_sectors = limits->max_hw_sectors;
  818. DEV_ATTRIB(dev)->max_sectors = limits->max_sectors;
  819. /*
  820. * Set optimal_sectors from max_sectors, which can be lowered via
  821. * configfs.
  822. */
  823. DEV_ATTRIB(dev)->optimal_sectors = limits->max_sectors;
  824. /*
  825. * queue_depth is based on subsystem plugin dependent requirements.
  826. */
  827. DEV_ATTRIB(dev)->hw_queue_depth = dev_limits->hw_queue_depth;
  828. DEV_ATTRIB(dev)->queue_depth = dev_limits->queue_depth;
  829. }
  830. int se_dev_set_task_timeout(struct se_device *dev, u32 task_timeout)
  831. {
  832. if (task_timeout > DA_TASK_TIMEOUT_MAX) {
  833. printk(KERN_ERR "dev[%p]: Passed task_timeout: %u larger then"
  834. " DA_TASK_TIMEOUT_MAX\n", dev, task_timeout);
  835. return -1;
  836. } else {
  837. DEV_ATTRIB(dev)->task_timeout = task_timeout;
  838. printk(KERN_INFO "dev[%p]: Set SE Device task_timeout: %u\n",
  839. dev, task_timeout);
  840. }
  841. return 0;
  842. }
  843. int se_dev_set_max_unmap_lba_count(
  844. struct se_device *dev,
  845. u32 max_unmap_lba_count)
  846. {
  847. DEV_ATTRIB(dev)->max_unmap_lba_count = max_unmap_lba_count;
  848. printk(KERN_INFO "dev[%p]: Set max_unmap_lba_count: %u\n",
  849. dev, DEV_ATTRIB(dev)->max_unmap_lba_count);
  850. return 0;
  851. }
  852. int se_dev_set_max_unmap_block_desc_count(
  853. struct se_device *dev,
  854. u32 max_unmap_block_desc_count)
  855. {
  856. DEV_ATTRIB(dev)->max_unmap_block_desc_count = max_unmap_block_desc_count;
  857. printk(KERN_INFO "dev[%p]: Set max_unmap_block_desc_count: %u\n",
  858. dev, DEV_ATTRIB(dev)->max_unmap_block_desc_count);
  859. return 0;
  860. }
  861. int se_dev_set_unmap_granularity(
  862. struct se_device *dev,
  863. u32 unmap_granularity)
  864. {
  865. DEV_ATTRIB(dev)->unmap_granularity = unmap_granularity;
  866. printk(KERN_INFO "dev[%p]: Set unmap_granularity: %u\n",
  867. dev, DEV_ATTRIB(dev)->unmap_granularity);
  868. return 0;
  869. }
  870. int se_dev_set_unmap_granularity_alignment(
  871. struct se_device *dev,
  872. u32 unmap_granularity_alignment)
  873. {
  874. DEV_ATTRIB(dev)->unmap_granularity_alignment = unmap_granularity_alignment;
  875. printk(KERN_INFO "dev[%p]: Set unmap_granularity_alignment: %u\n",
  876. dev, DEV_ATTRIB(dev)->unmap_granularity_alignment);
  877. return 0;
  878. }
  879. int se_dev_set_emulate_dpo(struct se_device *dev, int flag)
  880. {
  881. if ((flag != 0) && (flag != 1)) {
  882. printk(KERN_ERR "Illegal value %d\n", flag);
  883. return -1;
  884. }
  885. if (TRANSPORT(dev)->dpo_emulated == NULL) {
  886. printk(KERN_ERR "TRANSPORT(dev)->dpo_emulated is NULL\n");
  887. return -1;
  888. }
  889. if (TRANSPORT(dev)->dpo_emulated(dev) == 0) {
  890. printk(KERN_ERR "TRANSPORT(dev)->dpo_emulated not supported\n");
  891. return -1;
  892. }
  893. DEV_ATTRIB(dev)->emulate_dpo = flag;
  894. printk(KERN_INFO "dev[%p]: SE Device Page Out (DPO) Emulation"
  895. " bit: %d\n", dev, DEV_ATTRIB(dev)->emulate_dpo);
  896. return 0;
  897. }
  898. int se_dev_set_emulate_fua_write(struct se_device *dev, int flag)
  899. {
  900. if ((flag != 0) && (flag != 1)) {
  901. printk(KERN_ERR "Illegal value %d\n", flag);
  902. return -1;
  903. }
  904. if (TRANSPORT(dev)->fua_write_emulated == NULL) {
  905. printk(KERN_ERR "TRANSPORT(dev)->fua_write_emulated is NULL\n");
  906. return -1;
  907. }
  908. if (TRANSPORT(dev)->fua_write_emulated(dev) == 0) {
  909. printk(KERN_ERR "TRANSPORT(dev)->fua_write_emulated not supported\n");
  910. return -1;
  911. }
  912. DEV_ATTRIB(dev)->emulate_fua_write = flag;
  913. printk(KERN_INFO "dev[%p]: SE Device Forced Unit Access WRITEs: %d\n",
  914. dev, DEV_ATTRIB(dev)->emulate_fua_write);
  915. return 0;
  916. }
  917. int se_dev_set_emulate_fua_read(struct se_device *dev, int flag)
  918. {
  919. if ((flag != 0) && (flag != 1)) {
  920. printk(KERN_ERR "Illegal value %d\n", flag);
  921. return -1;
  922. }
  923. if (TRANSPORT(dev)->fua_read_emulated == NULL) {
  924. printk(KERN_ERR "TRANSPORT(dev)->fua_read_emulated is NULL\n");
  925. return -1;
  926. }
  927. if (TRANSPORT(dev)->fua_read_emulated(dev) == 0) {
  928. printk(KERN_ERR "TRANSPORT(dev)->fua_read_emulated not supported\n");
  929. return -1;
  930. }
  931. DEV_ATTRIB(dev)->emulate_fua_read = flag;
  932. printk(KERN_INFO "dev[%p]: SE Device Forced Unit Access READs: %d\n",
  933. dev, DEV_ATTRIB(dev)->emulate_fua_read);
  934. return 0;
  935. }
  936. int se_dev_set_emulate_write_cache(struct se_device *dev, int flag)
  937. {
  938. if ((flag != 0) && (flag != 1)) {
  939. printk(KERN_ERR "Illegal value %d\n", flag);
  940. return -1;
  941. }
  942. if (TRANSPORT(dev)->write_cache_emulated == NULL) {
  943. printk(KERN_ERR "TRANSPORT(dev)->write_cache_emulated is NULL\n");
  944. return -1;
  945. }
  946. if (TRANSPORT(dev)->write_cache_emulated(dev) == 0) {
  947. printk(KERN_ERR "TRANSPORT(dev)->write_cache_emulated not supported\n");
  948. return -1;
  949. }
  950. DEV_ATTRIB(dev)->emulate_write_cache = flag;
  951. printk(KERN_INFO "dev[%p]: SE Device WRITE_CACHE_EMULATION flag: %d\n",
  952. dev, DEV_ATTRIB(dev)->emulate_write_cache);
  953. return 0;
  954. }
  955. int se_dev_set_emulate_ua_intlck_ctrl(struct se_device *dev, int flag)
  956. {
  957. if ((flag != 0) && (flag != 1) && (flag != 2)) {
  958. printk(KERN_ERR "Illegal value %d\n", flag);
  959. return -1;
  960. }
  961. if (atomic_read(&dev->dev_export_obj.obj_access_count)) {
  962. printk(KERN_ERR "dev[%p]: Unable to change SE Device"
  963. " UA_INTRLCK_CTRL while dev_export_obj: %d count"
  964. " exists\n", dev,
  965. atomic_read(&dev->dev_export_obj.obj_access_count));
  966. return -1;
  967. }
  968. DEV_ATTRIB(dev)->emulate_ua_intlck_ctrl = flag;
  969. printk(KERN_INFO "dev[%p]: SE Device UA_INTRLCK_CTRL flag: %d\n",
  970. dev, DEV_ATTRIB(dev)->emulate_ua_intlck_ctrl);
  971. return 0;
  972. }
  973. int se_dev_set_emulate_tas(struct se_device *dev, int flag)
  974. {
  975. if ((flag != 0) && (flag != 1)) {
  976. printk(KERN_ERR "Illegal value %d\n", flag);
  977. return -1;
  978. }
  979. if (atomic_read(&dev->dev_export_obj.obj_access_count)) {
  980. printk(KERN_ERR "dev[%p]: Unable to change SE Device TAS while"
  981. " dev_export_obj: %d count exists\n", dev,
  982. atomic_read(&dev->dev_export_obj.obj_access_count));
  983. return -1;
  984. }
  985. DEV_ATTRIB(dev)->emulate_tas = flag;
  986. printk(KERN_INFO "dev[%p]: SE Device TASK_ABORTED status bit: %s\n",
  987. dev, (DEV_ATTRIB(dev)->emulate_tas) ? "Enabled" : "Disabled");
  988. return 0;
  989. }
  990. int se_dev_set_emulate_tpu(struct se_device *dev, int flag)
  991. {
  992. if ((flag != 0) && (flag != 1)) {
  993. printk(KERN_ERR "Illegal value %d\n", flag);
  994. return -1;
  995. }
  996. /*
  997. * We expect this value to be non-zero when generic Block Layer
  998. * Discard supported is detected iblock_create_virtdevice().
  999. */
  1000. if (!(DEV_ATTRIB(dev)->max_unmap_block_desc_count)) {
  1001. printk(KERN_ERR "Generic Block Discard not supported\n");
  1002. return -ENOSYS;
  1003. }
  1004. DEV_ATTRIB(dev)->emulate_tpu = flag;
  1005. printk(KERN_INFO "dev[%p]: SE Device Thin Provisioning UNMAP bit: %d\n",
  1006. dev, flag);
  1007. return 0;
  1008. }
  1009. int se_dev_set_emulate_tpws(struct se_device *dev, int flag)
  1010. {
  1011. if ((flag != 0) && (flag != 1)) {
  1012. printk(KERN_ERR "Illegal value %d\n", flag);
  1013. return -1;
  1014. }
  1015. /*
  1016. * We expect this value to be non-zero when generic Block Layer
  1017. * Discard supported is detected iblock_create_virtdevice().
  1018. */
  1019. if (!(DEV_ATTRIB(dev)->max_unmap_block_desc_count)) {
  1020. printk(KERN_ERR "Generic Block Discard not supported\n");
  1021. return -ENOSYS;
  1022. }
  1023. DEV_ATTRIB(dev)->emulate_tpws = flag;
  1024. printk(KERN_INFO "dev[%p]: SE Device Thin Provisioning WRITE_SAME: %d\n",
  1025. dev, flag);
  1026. return 0;
  1027. }
  1028. int se_dev_set_enforce_pr_isids(struct se_device *dev, int flag)
  1029. {
  1030. if ((flag != 0) && (flag != 1)) {
  1031. printk(KERN_ERR "Illegal value %d\n", flag);
  1032. return -1;
  1033. }
  1034. DEV_ATTRIB(dev)->enforce_pr_isids = flag;
  1035. printk(KERN_INFO "dev[%p]: SE Device enforce_pr_isids bit: %s\n", dev,
  1036. (DEV_ATTRIB(dev)->enforce_pr_isids) ? "Enabled" : "Disabled");
  1037. return 0;
  1038. }
  1039. /*
  1040. * Note, this can only be called on unexported SE Device Object.
  1041. */
  1042. int se_dev_set_queue_depth(struct se_device *dev, u32 queue_depth)
  1043. {
  1044. u32 orig_queue_depth = dev->queue_depth;
  1045. if (atomic_read(&dev->dev_export_obj.obj_access_count)) {
  1046. printk(KERN_ERR "dev[%p]: Unable to change SE Device TCQ while"
  1047. " dev_export_obj: %d count exists\n", dev,
  1048. atomic_read(&dev->dev_export_obj.obj_access_count));
  1049. return -1;
  1050. }
  1051. if (!(queue_depth)) {
  1052. printk(KERN_ERR "dev[%p]: Illegal ZERO value for queue"
  1053. "_depth\n", dev);
  1054. return -1;
  1055. }
  1056. if (TRANSPORT(dev)->transport_type == TRANSPORT_PLUGIN_PHBA_PDEV) {
  1057. if (queue_depth > DEV_ATTRIB(dev)->hw_queue_depth) {
  1058. printk(KERN_ERR "dev[%p]: Passed queue_depth: %u"
  1059. " exceeds TCM/SE_Device TCQ: %u\n",
  1060. dev, queue_depth,
  1061. DEV_ATTRIB(dev)->hw_queue_depth);
  1062. return -1;
  1063. }
  1064. } else {
  1065. if (queue_depth > DEV_ATTRIB(dev)->queue_depth) {
  1066. if (queue_depth > DEV_ATTRIB(dev)->hw_queue_depth) {
  1067. printk(KERN_ERR "dev[%p]: Passed queue_depth:"
  1068. " %u exceeds TCM/SE_Device MAX"
  1069. " TCQ: %u\n", dev, queue_depth,
  1070. DEV_ATTRIB(dev)->hw_queue_depth);
  1071. return -1;
  1072. }
  1073. }
  1074. }
  1075. DEV_ATTRIB(dev)->queue_depth = dev->queue_depth = queue_depth;
  1076. if (queue_depth > orig_queue_depth)
  1077. atomic_add(queue_depth - orig_queue_depth, &dev->depth_left);
  1078. else if (queue_depth < orig_queue_depth)
  1079. atomic_sub(orig_queue_depth - queue_depth, &dev->depth_left);
  1080. printk(KERN_INFO "dev[%p]: SE Device TCQ Depth changed to: %u\n",
  1081. dev, queue_depth);
  1082. return 0;
  1083. }
  1084. int se_dev_set_max_sectors(struct se_device *dev, u32 max_sectors)
  1085. {
  1086. int force = 0; /* Force setting for VDEVS */
  1087. if (atomic_read(&dev->dev_export_obj.obj_access_count)) {
  1088. printk(KERN_ERR "dev[%p]: Unable to change SE Device"
  1089. " max_sectors while dev_export_obj: %d count exists\n",
  1090. dev, atomic_read(&dev->dev_export_obj.obj_access_count));
  1091. return -1;
  1092. }
  1093. if (!(max_sectors)) {
  1094. printk(KERN_ERR "dev[%p]: Illegal ZERO value for"
  1095. " max_sectors\n", dev);
  1096. return -1;
  1097. }
  1098. if (max_sectors < DA_STATUS_MAX_SECTORS_MIN) {
  1099. printk(KERN_ERR "dev[%p]: Passed max_sectors: %u less than"
  1100. " DA_STATUS_MAX_SECTORS_MIN: %u\n", dev, max_sectors,
  1101. DA_STATUS_MAX_SECTORS_MIN);
  1102. return -1;
  1103. }
  1104. if (TRANSPORT(dev)->transport_type == TRANSPORT_PLUGIN_PHBA_PDEV) {
  1105. if (max_sectors > DEV_ATTRIB(dev)->hw_max_sectors) {
  1106. printk(KERN_ERR "dev[%p]: Passed max_sectors: %u"
  1107. " greater than TCM/SE_Device max_sectors:"
  1108. " %u\n", dev, max_sectors,
  1109. DEV_ATTRIB(dev)->hw_max_sectors);
  1110. return -1;
  1111. }
  1112. } else {
  1113. if (!(force) && (max_sectors >
  1114. DEV_ATTRIB(dev)->hw_max_sectors)) {
  1115. printk(KERN_ERR "dev[%p]: Passed max_sectors: %u"
  1116. " greater than TCM/SE_Device max_sectors"
  1117. ": %u, use force=1 to override.\n", dev,
  1118. max_sectors, DEV_ATTRIB(dev)->hw_max_sectors);
  1119. return -1;
  1120. }
  1121. if (max_sectors > DA_STATUS_MAX_SECTORS_MAX) {
  1122. printk(KERN_ERR "dev[%p]: Passed max_sectors: %u"
  1123. " greater than DA_STATUS_MAX_SECTORS_MAX:"
  1124. " %u\n", dev, max_sectors,
  1125. DA_STATUS_MAX_SECTORS_MAX);
  1126. return -1;
  1127. }
  1128. }
  1129. DEV_ATTRIB(dev)->max_sectors = max_sectors;
  1130. printk("dev[%p]: SE Device max_sectors changed to %u\n",
  1131. dev, max_sectors);
  1132. return 0;
  1133. }
  1134. int se_dev_set_optimal_sectors(struct se_device *dev, u32 optimal_sectors)
  1135. {
  1136. if (atomic_read(&dev->dev_export_obj.obj_access_count)) {
  1137. printk(KERN_ERR "dev[%p]: Unable to change SE Device"
  1138. " optimal_sectors while dev_export_obj: %d count exists\n",
  1139. dev, atomic_read(&dev->dev_export_obj.obj_access_count));
  1140. return -EINVAL;
  1141. }
  1142. if (TRANSPORT(dev)->transport_type == TRANSPORT_PLUGIN_PHBA_PDEV) {
  1143. printk(KERN_ERR "dev[%p]: Passed optimal_sectors cannot be"
  1144. " changed for TCM/pSCSI\n", dev);
  1145. return -EINVAL;
  1146. }
  1147. if (optimal_sectors > DEV_ATTRIB(dev)->max_sectors) {
  1148. printk(KERN_ERR "dev[%p]: Passed optimal_sectors %u cannot be"
  1149. " greater than max_sectors: %u\n", dev,
  1150. optimal_sectors, DEV_ATTRIB(dev)->max_sectors);
  1151. return -EINVAL;
  1152. }
  1153. DEV_ATTRIB(dev)->optimal_sectors = optimal_sectors;
  1154. printk(KERN_INFO "dev[%p]: SE Device optimal_sectors changed to %u\n",
  1155. dev, optimal_sectors);
  1156. return 0;
  1157. }
  1158. int se_dev_set_block_size(struct se_device *dev, u32 block_size)
  1159. {
  1160. if (atomic_read(&dev->dev_export_obj.obj_access_count)) {
  1161. printk(KERN_ERR "dev[%p]: Unable to change SE Device block_size"
  1162. " while dev_export_obj: %d count exists\n", dev,
  1163. atomic_read(&dev->dev_export_obj.obj_access_count));
  1164. return -1;
  1165. }
  1166. if ((block_size != 512) &&
  1167. (block_size != 1024) &&
  1168. (block_size != 2048) &&
  1169. (block_size != 4096)) {
  1170. printk(KERN_ERR "dev[%p]: Illegal value for block_device: %u"
  1171. " for SE device, must be 512, 1024, 2048 or 4096\n",
  1172. dev, block_size);
  1173. return -1;
  1174. }
  1175. if (TRANSPORT(dev)->transport_type == TRANSPORT_PLUGIN_PHBA_PDEV) {
  1176. printk(KERN_ERR "dev[%p]: Not allowed to change block_size for"
  1177. " Physical Device, use for Linux/SCSI to change"
  1178. " block_size for underlying hardware\n", dev);
  1179. return -1;
  1180. }
  1181. DEV_ATTRIB(dev)->block_size = block_size;
  1182. printk(KERN_INFO "dev[%p]: SE Device block_size changed to %u\n",
  1183. dev, block_size);
  1184. return 0;
  1185. }
  1186. struct se_lun *core_dev_add_lun(
  1187. struct se_portal_group *tpg,
  1188. struct se_hba *hba,
  1189. struct se_device *dev,
  1190. u32 lun)
  1191. {
  1192. struct se_lun *lun_p;
  1193. u32 lun_access = 0;
  1194. if (atomic_read(&dev->dev_access_obj.obj_access_count) != 0) {
  1195. printk(KERN_ERR "Unable to export struct se_device while dev_access_obj: %d\n",
  1196. atomic_read(&dev->dev_access_obj.obj_access_count));
  1197. return NULL;
  1198. }
  1199. lun_p = core_tpg_pre_addlun(tpg, lun);
  1200. if ((IS_ERR(lun_p)) || !(lun_p))
  1201. return NULL;
  1202. if (dev->dev_flags & DF_READ_ONLY)
  1203. lun_access = TRANSPORT_LUNFLAGS_READ_ONLY;
  1204. else
  1205. lun_access = TRANSPORT_LUNFLAGS_READ_WRITE;
  1206. if (core_tpg_post_addlun(tpg, lun_p, lun_access, dev) < 0)
  1207. return NULL;
  1208. printk(KERN_INFO "%s_TPG[%u]_LUN[%u] - Activated %s Logical Unit from"
  1209. " CORE HBA: %u\n", TPG_TFO(tpg)->get_fabric_name(),
  1210. TPG_TFO(tpg)->tpg_get_tag(tpg), lun_p->unpacked_lun,
  1211. TPG_TFO(tpg)->get_fabric_name(), hba->hba_id);
  1212. /*
  1213. * Update LUN maps for dynamically added initiators when
  1214. * generate_node_acl is enabled.
  1215. */
  1216. if (TPG_TFO(tpg)->tpg_check_demo_mode(tpg)) {
  1217. struct se_node_acl *acl;
  1218. spin_lock_bh(&tpg->acl_node_lock);
  1219. list_for_each_entry(acl, &tpg->acl_node_list, acl_list) {
  1220. if (acl->dynamic_node_acl) {
  1221. spin_unlock_bh(&tpg->acl_node_lock);
  1222. core_tpg_add_node_to_devs(acl, tpg);
  1223. spin_lock_bh(&tpg->acl_node_lock);
  1224. }
  1225. }
  1226. spin_unlock_bh(&tpg->acl_node_lock);
  1227. }
  1228. return lun_p;
  1229. }
  1230. /* core_dev_del_lun():
  1231. *
  1232. *
  1233. */
  1234. int core_dev_del_lun(
  1235. struct se_portal_group *tpg,
  1236. u32 unpacked_lun)
  1237. {
  1238. struct se_lun *lun;
  1239. int ret = 0;
  1240. lun = core_tpg_pre_dellun(tpg, unpacked_lun, &ret);
  1241. if (!(lun))
  1242. return ret;
  1243. core_tpg_post_dellun(tpg, lun);
  1244. printk(KERN_INFO "%s_TPG[%u]_LUN[%u] - Deactivated %s Logical Unit from"
  1245. " device object\n", TPG_TFO(tpg)->get_fabric_name(),
  1246. TPG_TFO(tpg)->tpg_get_tag(tpg), unpacked_lun,
  1247. TPG_TFO(tpg)->get_fabric_name());
  1248. return 0;
  1249. }
  1250. struct se_lun *core_get_lun_from_tpg(struct se_portal_group *tpg, u32 unpacked_lun)
  1251. {
  1252. struct se_lun *lun;
  1253. spin_lock(&tpg->tpg_lun_lock);
  1254. if (unpacked_lun > (TRANSPORT_MAX_LUNS_PER_TPG-1)) {
  1255. printk(KERN_ERR "%s LUN: %u exceeds TRANSPORT_MAX_LUNS"
  1256. "_PER_TPG-1: %u for Target Portal Group: %hu\n",
  1257. TPG_TFO(tpg)->get_fabric_name(), unpacked_lun,
  1258. TRANSPORT_MAX_LUNS_PER_TPG-1,
  1259. TPG_TFO(tpg)->tpg_get_tag(tpg));
  1260. spin_unlock(&tpg->tpg_lun_lock);
  1261. return NULL;
  1262. }
  1263. lun = &tpg->tpg_lun_list[unpacked_lun];
  1264. if (lun->lun_status != TRANSPORT_LUN_STATUS_FREE) {
  1265. printk(KERN_ERR "%s Logical Unit Number: %u is not free on"
  1266. " Target Portal Group: %hu, ignoring request.\n",
  1267. TPG_TFO(tpg)->get_fabric_name(), unpacked_lun,
  1268. TPG_TFO(tpg)->tpg_get_tag(tpg));
  1269. spin_unlock(&tpg->tpg_lun_lock);
  1270. return NULL;
  1271. }
  1272. spin_unlock(&tpg->tpg_lun_lock);
  1273. return lun;
  1274. }
  1275. /* core_dev_get_lun():
  1276. *
  1277. *
  1278. */
  1279. static struct se_lun *core_dev_get_lun(struct se_portal_group *tpg, u32 unpacked_lun)
  1280. {
  1281. struct se_lun *lun;
  1282. spin_lock(&tpg->tpg_lun_lock);
  1283. if (unpacked_lun > (TRANSPORT_MAX_LUNS_PER_TPG-1)) {
  1284. printk(KERN_ERR "%s LUN: %u exceeds TRANSPORT_MAX_LUNS_PER"
  1285. "_TPG-1: %u for Target Portal Group: %hu\n",
  1286. TPG_TFO(tpg)->get_fabric_name(), unpacked_lun,
  1287. TRANSPORT_MAX_LUNS_PER_TPG-1,
  1288. TPG_TFO(tpg)->tpg_get_tag(tpg));
  1289. spin_unlock(&tpg->tpg_lun_lock);
  1290. return NULL;
  1291. }
  1292. lun = &tpg->tpg_lun_list[unpacked_lun];
  1293. if (lun->lun_status != TRANSPORT_LUN_STATUS_ACTIVE) {
  1294. printk(KERN_ERR "%s Logical Unit Number: %u is not active on"
  1295. " Target Portal Group: %hu, ignoring request.\n",
  1296. TPG_TFO(tpg)->get_fabric_name(), unpacked_lun,
  1297. TPG_TFO(tpg)->tpg_get_tag(tpg));
  1298. spin_unlock(&tpg->tpg_lun_lock);
  1299. return NULL;
  1300. }
  1301. spin_unlock(&tpg->tpg_lun_lock);
  1302. return lun;
  1303. }
  1304. struct se_lun_acl *core_dev_init_initiator_node_lun_acl(
  1305. struct se_portal_group *tpg,
  1306. u32 mapped_lun,
  1307. char *initiatorname,
  1308. int *ret)
  1309. {
  1310. struct se_lun_acl *lacl;
  1311. struct se_node_acl *nacl;
  1312. if (strlen(initiatorname) > TRANSPORT_IQN_LEN) {
  1313. printk(KERN_ERR "%s InitiatorName exceeds maximum size.\n",
  1314. TPG_TFO(tpg)->get_fabric_name());
  1315. *ret = -EOVERFLOW;
  1316. return NULL;
  1317. }
  1318. nacl = core_tpg_get_initiator_node_acl(tpg, initiatorname);
  1319. if (!(nacl)) {
  1320. *ret = -EINVAL;
  1321. return NULL;
  1322. }
  1323. lacl = kzalloc(sizeof(struct se_lun_acl), GFP_KERNEL);
  1324. if (!(lacl)) {
  1325. printk(KERN_ERR "Unable to allocate memory for struct se_lun_acl.\n");
  1326. *ret = -ENOMEM;
  1327. return NULL;
  1328. }
  1329. INIT_LIST_HEAD(&lacl->lacl_list);
  1330. lacl->mapped_lun = mapped_lun;
  1331. lacl->se_lun_nacl = nacl;
  1332. snprintf(lacl->initiatorname, TRANSPORT_IQN_LEN, "%s", initiatorname);
  1333. return lacl;
  1334. }
  1335. int core_dev_add_initiator_node_lun_acl(
  1336. struct se_portal_group *tpg,
  1337. struct se_lun_acl *lacl,
  1338. u32 unpacked_lun,
  1339. u32 lun_access)
  1340. {
  1341. struct se_lun *lun;
  1342. struct se_node_acl *nacl;
  1343. lun = core_dev_get_lun(tpg, unpacked_lun);
  1344. if (!(lun)) {
  1345. printk(KERN_ERR "%s Logical Unit Number: %u is not active on"
  1346. " Target Portal Group: %hu, ignoring request.\n",
  1347. TPG_TFO(tpg)->get_fabric_name(), unpacked_lun,
  1348. TPG_TFO(tpg)->tpg_get_tag(tpg));
  1349. return -EINVAL;
  1350. }
  1351. nacl = lacl->se_lun_nacl;
  1352. if (!(nacl))
  1353. return -EINVAL;
  1354. if ((lun->lun_access & TRANSPORT_LUNFLAGS_READ_ONLY) &&
  1355. (lun_access & TRANSPORT_LUNFLAGS_READ_WRITE))
  1356. lun_access = TRANSPORT_LUNFLAGS_READ_ONLY;
  1357. lacl->se_lun = lun;
  1358. if (core_update_device_list_for_node(lun, lacl, lacl->mapped_lun,
  1359. lun_access, nacl, tpg, 1) < 0)
  1360. return -EINVAL;
  1361. spin_lock(&lun->lun_acl_lock);
  1362. list_add_tail(&lacl->lacl_list, &lun->lun_acl_list);
  1363. atomic_inc(&lun->lun_acl_count);
  1364. smp_mb__after_atomic_inc();
  1365. spin_unlock(&lun->lun_acl_lock);
  1366. printk(KERN_INFO "%s_TPG[%hu]_LUN[%u->%u] - Added %s ACL for "
  1367. " InitiatorNode: %s\n", TPG_TFO(tpg)->get_fabric_name(),
  1368. TPG_TFO(tpg)->tpg_get_tag(tpg), unpacked_lun, lacl->mapped_lun,
  1369. (lun_access & TRANSPORT_LUNFLAGS_READ_WRITE) ? "RW" : "RO",
  1370. lacl->initiatorname);
  1371. /*
  1372. * Check to see if there are any existing persistent reservation APTPL
  1373. * pre-registrations that need to be enabled for this LUN ACL..
  1374. */
  1375. core_scsi3_check_aptpl_registration(lun->lun_se_dev, tpg, lun, lacl);
  1376. return 0;
  1377. }
  1378. /* core_dev_del_initiator_node_lun_acl():
  1379. *
  1380. *
  1381. */
  1382. int core_dev_del_initiator_node_lun_acl(
  1383. struct se_portal_group *tpg,
  1384. struct se_lun *lun,
  1385. struct se_lun_acl *lacl)
  1386. {
  1387. struct se_node_acl *nacl;
  1388. nacl = lacl->se_lun_nacl;
  1389. if (!(nacl))
  1390. return -EINVAL;
  1391. spin_lock(&lun->lun_acl_lock);
  1392. list_del(&lacl->lacl_list);
  1393. atomic_dec(&lun->lun_acl_count);
  1394. smp_mb__after_atomic_dec();
  1395. spin_unlock(&lun->lun_acl_lock);
  1396. core_update_device_list_for_node(lun, NULL, lacl->mapped_lun,
  1397. TRANSPORT_LUNFLAGS_NO_ACCESS, nacl, tpg, 0);
  1398. lacl->se_lun = NULL;
  1399. printk(KERN_INFO "%s_TPG[%hu]_LUN[%u] - Removed ACL for"
  1400. " InitiatorNode: %s Mapped LUN: %u\n",
  1401. TPG_TFO(tpg)->get_fabric_name(),
  1402. TPG_TFO(tpg)->tpg_get_tag(tpg), lun->unpacked_lun,
  1403. lacl->initiatorname, lacl->mapped_lun);
  1404. return 0;
  1405. }
  1406. void core_dev_free_initiator_node_lun_acl(
  1407. struct se_portal_group *tpg,
  1408. struct se_lun_acl *lacl)
  1409. {
  1410. printk("%s_TPG[%hu] - Freeing ACL for %s InitiatorNode: %s"
  1411. " Mapped LUN: %u\n", TPG_TFO(tpg)->get_fabric_name(),
  1412. TPG_TFO(tpg)->tpg_get_tag(tpg),
  1413. TPG_TFO(tpg)->get_fabric_name(),
  1414. lacl->initiatorname, lacl->mapped_lun);
  1415. kfree(lacl);
  1416. }
  1417. int core_dev_setup_virtual_lun0(void)
  1418. {
  1419. struct se_hba *hba;
  1420. struct se_device *dev;
  1421. struct se_subsystem_dev *se_dev = NULL;
  1422. struct se_subsystem_api *t;
  1423. char buf[16];
  1424. int ret;
  1425. hba = core_alloc_hba("rd_dr", 0, HBA_FLAGS_INTERNAL_USE);
  1426. if (IS_ERR(hba))
  1427. return PTR_ERR(hba);
  1428. se_global->g_lun0_hba = hba;
  1429. t = hba->transport;
  1430. se_dev = kzalloc(sizeof(struct se_subsystem_dev), GFP_KERNEL);
  1431. if (!(se_dev)) {
  1432. printk(KERN_ERR "Unable to allocate memory for"
  1433. " struct se_subsystem_dev\n");
  1434. ret = -ENOMEM;
  1435. goto out;
  1436. }
  1437. INIT_LIST_HEAD(&se_dev->g_se_dev_list);
  1438. INIT_LIST_HEAD(&se_dev->t10_wwn.t10_vpd_list);
  1439. spin_lock_init(&se_dev->t10_wwn.t10_vpd_lock);
  1440. INIT_LIST_HEAD(&se_dev->t10_reservation.registration_list);
  1441. INIT_LIST_HEAD(&se_dev->t10_reservation.aptpl_reg_list);
  1442. spin_lock_init(&se_dev->t10_reservation.registration_lock);
  1443. spin_lock_init(&se_dev->t10_reservation.aptpl_reg_lock);
  1444. INIT_LIST_HEAD(&se_dev->t10_alua.tg_pt_gps_list);
  1445. spin_lock_init(&se_dev->t10_alua.tg_pt_gps_lock);
  1446. spin_lock_init(&se_dev->se_dev_lock);
  1447. se_dev->t10_reservation.pr_aptpl_buf_len = PR_APTPL_BUF_LEN;
  1448. se_dev->t10_wwn.t10_sub_dev = se_dev;
  1449. se_dev->t10_alua.t10_sub_dev = se_dev;
  1450. se_dev->se_dev_attrib.da_sub_dev = se_dev;
  1451. se_dev->se_dev_hba = hba;
  1452. se_dev->se_dev_su_ptr = t->allocate_virtdevice(hba, "virt_lun0");
  1453. if (!(se_dev->se_dev_su_ptr)) {
  1454. printk(KERN_ERR "Unable to locate subsystem dependent pointer"
  1455. " from allocate_virtdevice()\n");
  1456. ret = -ENOMEM;
  1457. goto out;
  1458. }
  1459. se_global->g_lun0_su_dev = se_dev;
  1460. memset(buf, 0, 16);
  1461. sprintf(buf, "rd_pages=8");
  1462. t->set_configfs_dev_params(hba, se_dev, buf, sizeof(buf));
  1463. dev = t->create_virtdevice(hba, se_dev, se_dev->se_dev_su_ptr);
  1464. if (!(dev) || IS_ERR(dev)) {
  1465. ret = -ENOMEM;
  1466. goto out;
  1467. }
  1468. se_dev->se_dev_ptr = dev;
  1469. se_global->g_lun0_dev = dev;
  1470. return 0;
  1471. out:
  1472. se_global->g_lun0_su_dev = NULL;
  1473. kfree(se_dev);
  1474. if (se_global->g_lun0_hba) {
  1475. core_delete_hba(se_global->g_lun0_hba);
  1476. se_global->g_lun0_hba = NULL;
  1477. }
  1478. return ret;
  1479. }
  1480. void core_dev_release_virtual_lun0(void)
  1481. {
  1482. struct se_hba *hba = se_global->g_lun0_hba;
  1483. struct se_subsystem_dev *su_dev = se_global->g_lun0_su_dev;
  1484. if (!(hba))
  1485. return;
  1486. if (se_global->g_lun0_dev)
  1487. se_free_virtual_device(se_global->g_lun0_dev, hba);
  1488. kfree(su_dev);
  1489. core_delete_hba(hba);
  1490. }