target_core_device.c 48 KB

123456789101112131415161718192021222324252627282930313233343536373839404142434445464748495051525354555657585960616263646566676869707172737475767778798081828384858687888990919293949596979899100101102103104105106107108109110111112113114115116117118119120121122123124125126127128129130131132133134135136137138139140141142143144145146147148149150151152153154155156157158159160161162163164165166167168169170171172173174175176177178179180181182183184185186187188189190191192193194195196197198199200201202203204205206207208209210211212213214215216217218219220221222223224225226227228229230231232233234235236237238239240241242243244245246247248249250251252253254255256257258259260261262263264265266267268269270271272273274275276277278279280281282283284285286287288289290291292293294295296297298299300301302303304305306307308309310311312313314315316317318319320321322323324325326327328329330331332333334335336337338339340341342343344345346347348349350351352353354355356357358359360361362363364365366367368369370371372373374375376377378379380381382383384385386387388389390391392393394395396397398399400401402403404405406407408409410411412413414415416417418419420421422423424425426427428429430431432433434435436437438439440441442443444445446447448449450451452453454455456457458459460461462463464465466467468469470471472473474475476477478479480481482483484485486487488489490491492493494495496497498499500501502503504505506507508509510511512513514515516517518519520521522523524525526527528529530531532533534535536537538539540541542543544545546547548549550551552553554555556557558559560561562563564565566567568569570571572573574575576577578579580581582583584585586587588589590591592593594595596597598599600601602603604605606607608609610611612613614615616617618619620621622623624625626627628629630631632633634635636637638639640641642643644645646647648649650651652653654655656657658659660661662663664665666667668669670671672673674675676677678679680681682683684685686687688689690691692693694695696697698699700701702703704705706707708709710711712713714715716717718719720721722723724725726727728729730731732733734735736737738739740741742743744745746747748749750751752753754755756757758759760761762763764765766767768769770771772773774775776777778779780781782783784785786787788789790791792793794795796797798799800801802803804805806807808809810811812813814815816817818819820821822823824825826827828829830831832833834835836837838839840841842843844845846847848849850851852853854855856857858859860861862863864865866867868869870871872873874875876877878879880881882883884885886887888889890891892893894895896897898899900901902903904905906907908909910911912913914915916917918919920921922923924925926927928929930931932933934935936937938939940941942943944945946947948949950951952953954955956957958959960961962963964965966967968969970971972973974975976977978979980981982983984985986987988989990991992993994995996997998999100010011002100310041005100610071008100910101011101210131014101510161017101810191020102110221023102410251026102710281029103010311032103310341035103610371038103910401041104210431044104510461047104810491050105110521053105410551056105710581059106010611062106310641065106610671068106910701071107210731074107510761077107810791080108110821083108410851086108710881089109010911092109310941095109610971098109911001101110211031104110511061107110811091110111111121113111411151116111711181119112011211122112311241125112611271128112911301131113211331134113511361137113811391140114111421143114411451146114711481149115011511152115311541155115611571158115911601161116211631164116511661167116811691170117111721173117411751176117711781179118011811182118311841185118611871188118911901191119211931194119511961197119811991200120112021203120412051206120712081209121012111212121312141215121612171218121912201221122212231224122512261227122812291230123112321233123412351236123712381239124012411242124312441245124612471248124912501251125212531254125512561257125812591260126112621263126412651266126712681269127012711272127312741275127612771278127912801281128212831284128512861287128812891290129112921293129412951296129712981299130013011302130313041305130613071308130913101311131213131314131513161317131813191320132113221323132413251326132713281329133013311332133313341335133613371338133913401341134213431344134513461347134813491350135113521353135413551356135713581359136013611362136313641365136613671368136913701371137213731374137513761377137813791380138113821383138413851386138713881389139013911392139313941395139613971398139914001401140214031404140514061407140814091410141114121413141414151416141714181419142014211422142314241425142614271428142914301431143214331434143514361437143814391440144114421443144414451446144714481449145014511452145314541455145614571458145914601461146214631464146514661467146814691470147114721473147414751476147714781479148014811482148314841485148614871488148914901491149214931494149514961497149814991500150115021503150415051506150715081509151015111512151315141515151615171518151915201521152215231524152515261527152815291530153115321533153415351536153715381539154015411542154315441545154615471548154915501551155215531554155515561557155815591560156115621563156415651566156715681569157015711572157315741575157615771578157915801581158215831584158515861587158815891590159115921593159415951596159715981599160016011602160316041605160616071608160916101611161216131614161516161617161816191620162116221623162416251626162716281629163016311632163316341635163616371638163916401641164216431644164516461647164816491650165116521653165416551656165716581659166016611662166316641665166616671668166916701671167216731674167516761677167816791680168116821683168416851686168716881689169016911692169316941695169616971698
  1. /*******************************************************************************
  2. * Filename: target_core_device.c (based on iscsi_target_device.c)
  3. *
  4. * This file contains the TCM Virtual Device and Disk Transport
  5. * agnostic related functions.
  6. *
  7. * 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/kthread.h>
  36. #include <linux/in.h>
  37. #include <linux/export.h>
  38. #include <net/sock.h>
  39. #include <net/tcp.h>
  40. #include <scsi/scsi.h>
  41. #include <scsi/scsi_device.h>
  42. #include <target/target_core_base.h>
  43. #include <target/target_core_backend.h>
  44. #include <target/target_core_fabric.h>
  45. #include "target_core_internal.h"
  46. #include "target_core_alua.h"
  47. #include "target_core_pr.h"
  48. #include "target_core_ua.h"
  49. static void se_dev_start(struct se_device *dev);
  50. static void se_dev_stop(struct se_device *dev);
  51. static struct se_hba *lun0_hba;
  52. static struct se_subsystem_dev *lun0_su_dev;
  53. /* not static, needed by tpg.c */
  54. struct se_device *g_lun0_dev;
  55. int transport_lookup_cmd_lun(struct se_cmd *se_cmd, u32 unpacked_lun)
  56. {
  57. struct se_lun *se_lun = NULL;
  58. struct se_session *se_sess = se_cmd->se_sess;
  59. struct se_device *dev;
  60. unsigned long flags;
  61. if (unpacked_lun >= TRANSPORT_MAX_LUNS_PER_TPG) {
  62. se_cmd->scsi_sense_reason = TCM_NON_EXISTENT_LUN;
  63. se_cmd->se_cmd_flags |= SCF_SCSI_CDB_EXCEPTION;
  64. return -ENODEV;
  65. }
  66. spin_lock_irqsave(&se_sess->se_node_acl->device_list_lock, flags);
  67. se_cmd->se_deve = &se_sess->se_node_acl->device_list[unpacked_lun];
  68. if (se_cmd->se_deve->lun_flags & TRANSPORT_LUNFLAGS_INITIATOR_ACCESS) {
  69. struct se_dev_entry *deve = se_cmd->se_deve;
  70. deve->total_cmds++;
  71. deve->total_bytes += se_cmd->data_length;
  72. if ((se_cmd->data_direction == DMA_TO_DEVICE) &&
  73. (deve->lun_flags & TRANSPORT_LUNFLAGS_READ_ONLY)) {
  74. se_cmd->scsi_sense_reason = TCM_WRITE_PROTECTED;
  75. se_cmd->se_cmd_flags |= SCF_SCSI_CDB_EXCEPTION;
  76. pr_err("TARGET_CORE[%s]: Detected WRITE_PROTECTED LUN"
  77. " Access for 0x%08x\n",
  78. se_cmd->se_tfo->get_fabric_name(),
  79. unpacked_lun);
  80. spin_unlock_irqrestore(&se_sess->se_node_acl->device_list_lock, flags);
  81. return -EACCES;
  82. }
  83. if (se_cmd->data_direction == DMA_TO_DEVICE)
  84. deve->write_bytes += se_cmd->data_length;
  85. else if (se_cmd->data_direction == DMA_FROM_DEVICE)
  86. deve->read_bytes += se_cmd->data_length;
  87. deve->deve_cmds++;
  88. se_lun = deve->se_lun;
  89. se_cmd->se_lun = deve->se_lun;
  90. se_cmd->pr_res_key = deve->pr_res_key;
  91. se_cmd->orig_fe_lun = unpacked_lun;
  92. se_cmd->se_cmd_flags |= SCF_SE_LUN_CMD;
  93. }
  94. spin_unlock_irqrestore(&se_sess->se_node_acl->device_list_lock, flags);
  95. if (!se_lun) {
  96. /*
  97. * Use the se_portal_group->tpg_virt_lun0 to allow for
  98. * REPORT_LUNS, et al to be returned when no active
  99. * MappedLUN=0 exists for this Initiator Port.
  100. */
  101. if (unpacked_lun != 0) {
  102. se_cmd->scsi_sense_reason = TCM_NON_EXISTENT_LUN;
  103. se_cmd->se_cmd_flags |= SCF_SCSI_CDB_EXCEPTION;
  104. pr_err("TARGET_CORE[%s]: Detected NON_EXISTENT_LUN"
  105. " Access for 0x%08x\n",
  106. se_cmd->se_tfo->get_fabric_name(),
  107. unpacked_lun);
  108. return -ENODEV;
  109. }
  110. /*
  111. * Force WRITE PROTECT for virtual LUN 0
  112. */
  113. if ((se_cmd->data_direction != DMA_FROM_DEVICE) &&
  114. (se_cmd->data_direction != DMA_NONE)) {
  115. se_cmd->scsi_sense_reason = TCM_WRITE_PROTECTED;
  116. se_cmd->se_cmd_flags |= SCF_SCSI_CDB_EXCEPTION;
  117. return -EACCES;
  118. }
  119. se_lun = &se_sess->se_tpg->tpg_virt_lun0;
  120. se_cmd->se_lun = &se_sess->se_tpg->tpg_virt_lun0;
  121. se_cmd->orig_fe_lun = 0;
  122. se_cmd->se_cmd_flags |= SCF_SE_LUN_CMD;
  123. }
  124. /*
  125. * Determine if the struct se_lun is online.
  126. * FIXME: Check for LUN_RESET + UNIT Attention
  127. */
  128. if (se_dev_check_online(se_lun->lun_se_dev) != 0) {
  129. se_cmd->scsi_sense_reason = TCM_NON_EXISTENT_LUN;
  130. se_cmd->se_cmd_flags |= SCF_SCSI_CDB_EXCEPTION;
  131. return -ENODEV;
  132. }
  133. /* Directly associate cmd with se_dev */
  134. se_cmd->se_dev = se_lun->lun_se_dev;
  135. /* TODO: get rid of this and use atomics for stats */
  136. dev = se_lun->lun_se_dev;
  137. spin_lock_irqsave(&dev->stats_lock, flags);
  138. dev->num_cmds++;
  139. if (se_cmd->data_direction == DMA_TO_DEVICE)
  140. dev->write_bytes += se_cmd->data_length;
  141. else if (se_cmd->data_direction == DMA_FROM_DEVICE)
  142. dev->read_bytes += se_cmd->data_length;
  143. spin_unlock_irqrestore(&dev->stats_lock, flags);
  144. spin_lock_irqsave(&se_lun->lun_cmd_lock, flags);
  145. list_add_tail(&se_cmd->se_lun_node, &se_lun->lun_cmd_list);
  146. spin_unlock_irqrestore(&se_lun->lun_cmd_lock, flags);
  147. return 0;
  148. }
  149. EXPORT_SYMBOL(transport_lookup_cmd_lun);
  150. int transport_lookup_tmr_lun(struct se_cmd *se_cmd, u32 unpacked_lun)
  151. {
  152. struct se_dev_entry *deve;
  153. struct se_lun *se_lun = NULL;
  154. struct se_session *se_sess = se_cmd->se_sess;
  155. struct se_tmr_req *se_tmr = se_cmd->se_tmr_req;
  156. unsigned long flags;
  157. if (unpacked_lun >= TRANSPORT_MAX_LUNS_PER_TPG) {
  158. se_cmd->scsi_sense_reason = TCM_NON_EXISTENT_LUN;
  159. se_cmd->se_cmd_flags |= SCF_SCSI_CDB_EXCEPTION;
  160. return -ENODEV;
  161. }
  162. spin_lock_irqsave(&se_sess->se_node_acl->device_list_lock, flags);
  163. se_cmd->se_deve = &se_sess->se_node_acl->device_list[unpacked_lun];
  164. deve = se_cmd->se_deve;
  165. if (deve->lun_flags & TRANSPORT_LUNFLAGS_INITIATOR_ACCESS) {
  166. se_tmr->tmr_lun = deve->se_lun;
  167. se_cmd->se_lun = deve->se_lun;
  168. se_lun = deve->se_lun;
  169. se_cmd->pr_res_key = deve->pr_res_key;
  170. se_cmd->orig_fe_lun = unpacked_lun;
  171. }
  172. spin_unlock_irqrestore(&se_sess->se_node_acl->device_list_lock, flags);
  173. if (!se_lun) {
  174. pr_debug("TARGET_CORE[%s]: Detected NON_EXISTENT_LUN"
  175. " Access for 0x%08x\n",
  176. se_cmd->se_tfo->get_fabric_name(),
  177. unpacked_lun);
  178. se_cmd->se_cmd_flags |= SCF_SCSI_CDB_EXCEPTION;
  179. return -ENODEV;
  180. }
  181. /*
  182. * Determine if the struct se_lun is online.
  183. * FIXME: Check for LUN_RESET + UNIT Attention
  184. */
  185. if (se_dev_check_online(se_lun->lun_se_dev) != 0) {
  186. se_cmd->se_cmd_flags |= SCF_SCSI_CDB_EXCEPTION;
  187. return -ENODEV;
  188. }
  189. /* Directly associate cmd with se_dev */
  190. se_cmd->se_dev = se_lun->lun_se_dev;
  191. se_tmr->tmr_dev = se_lun->lun_se_dev;
  192. spin_lock_irqsave(&se_tmr->tmr_dev->se_tmr_lock, flags);
  193. list_add_tail(&se_tmr->tmr_list, &se_tmr->tmr_dev->dev_tmr_list);
  194. spin_unlock_irqrestore(&se_tmr->tmr_dev->se_tmr_lock, flags);
  195. return 0;
  196. }
  197. EXPORT_SYMBOL(transport_lookup_tmr_lun);
  198. /*
  199. * This function is called from core_scsi3_emulate_pro_register_and_move()
  200. * and core_scsi3_decode_spec_i_port(), and will increment &deve->pr_ref_count
  201. * when a matching rtpi is found.
  202. */
  203. struct se_dev_entry *core_get_se_deve_from_rtpi(
  204. struct se_node_acl *nacl,
  205. u16 rtpi)
  206. {
  207. struct se_dev_entry *deve;
  208. struct se_lun *lun;
  209. struct se_port *port;
  210. struct se_portal_group *tpg = nacl->se_tpg;
  211. u32 i;
  212. spin_lock_irq(&nacl->device_list_lock);
  213. for (i = 0; i < TRANSPORT_MAX_LUNS_PER_TPG; i++) {
  214. deve = &nacl->device_list[i];
  215. if (!(deve->lun_flags & TRANSPORT_LUNFLAGS_INITIATOR_ACCESS))
  216. continue;
  217. lun = deve->se_lun;
  218. if (!lun) {
  219. pr_err("%s device entries device pointer is"
  220. " NULL, but Initiator has access.\n",
  221. tpg->se_tpg_tfo->get_fabric_name());
  222. continue;
  223. }
  224. port = lun->lun_sep;
  225. if (!port) {
  226. pr_err("%s device entries device pointer is"
  227. " NULL, but Initiator has access.\n",
  228. tpg->se_tpg_tfo->get_fabric_name());
  229. continue;
  230. }
  231. if (port->sep_rtpi != rtpi)
  232. continue;
  233. atomic_inc(&deve->pr_ref_count);
  234. smp_mb__after_atomic_inc();
  235. spin_unlock_irq(&nacl->device_list_lock);
  236. return deve;
  237. }
  238. spin_unlock_irq(&nacl->device_list_lock);
  239. return NULL;
  240. }
  241. int core_free_device_list_for_node(
  242. struct se_node_acl *nacl,
  243. struct se_portal_group *tpg)
  244. {
  245. struct se_dev_entry *deve;
  246. struct se_lun *lun;
  247. u32 i;
  248. if (!nacl->device_list)
  249. return 0;
  250. spin_lock_irq(&nacl->device_list_lock);
  251. for (i = 0; i < TRANSPORT_MAX_LUNS_PER_TPG; i++) {
  252. deve = &nacl->device_list[i];
  253. if (!(deve->lun_flags & TRANSPORT_LUNFLAGS_INITIATOR_ACCESS))
  254. continue;
  255. if (!deve->se_lun) {
  256. pr_err("%s device entries device pointer is"
  257. " NULL, but Initiator has access.\n",
  258. tpg->se_tpg_tfo->get_fabric_name());
  259. continue;
  260. }
  261. lun = deve->se_lun;
  262. spin_unlock_irq(&nacl->device_list_lock);
  263. core_update_device_list_for_node(lun, NULL, deve->mapped_lun,
  264. TRANSPORT_LUNFLAGS_NO_ACCESS, nacl, tpg, 0);
  265. spin_lock_irq(&nacl->device_list_lock);
  266. }
  267. spin_unlock_irq(&nacl->device_list_lock);
  268. kfree(nacl->device_list);
  269. nacl->device_list = NULL;
  270. return 0;
  271. }
  272. void core_dec_lacl_count(struct se_node_acl *se_nacl, struct se_cmd *se_cmd)
  273. {
  274. struct se_dev_entry *deve;
  275. unsigned long flags;
  276. spin_lock_irqsave(&se_nacl->device_list_lock, flags);
  277. deve = &se_nacl->device_list[se_cmd->orig_fe_lun];
  278. deve->deve_cmds--;
  279. spin_unlock_irqrestore(&se_nacl->device_list_lock, flags);
  280. }
  281. void core_update_device_list_access(
  282. u32 mapped_lun,
  283. u32 lun_access,
  284. struct se_node_acl *nacl)
  285. {
  286. struct se_dev_entry *deve;
  287. spin_lock_irq(&nacl->device_list_lock);
  288. deve = &nacl->device_list[mapped_lun];
  289. if (lun_access & TRANSPORT_LUNFLAGS_READ_WRITE) {
  290. deve->lun_flags &= ~TRANSPORT_LUNFLAGS_READ_ONLY;
  291. deve->lun_flags |= TRANSPORT_LUNFLAGS_READ_WRITE;
  292. } else {
  293. deve->lun_flags &= ~TRANSPORT_LUNFLAGS_READ_WRITE;
  294. deve->lun_flags |= TRANSPORT_LUNFLAGS_READ_ONLY;
  295. }
  296. spin_unlock_irq(&nacl->device_list_lock);
  297. }
  298. /* core_update_device_list_for_node():
  299. *
  300. *
  301. */
  302. int core_update_device_list_for_node(
  303. struct se_lun *lun,
  304. struct se_lun_acl *lun_acl,
  305. u32 mapped_lun,
  306. u32 lun_access,
  307. struct se_node_acl *nacl,
  308. struct se_portal_group *tpg,
  309. int enable)
  310. {
  311. struct se_port *port = lun->lun_sep;
  312. struct se_dev_entry *deve = &nacl->device_list[mapped_lun];
  313. int trans = 0;
  314. /*
  315. * If the MappedLUN entry is being disabled, the entry in
  316. * port->sep_alua_list must be removed now before clearing the
  317. * struct se_dev_entry pointers below as logic in
  318. * core_alua_do_transition_tg_pt() depends on these being present.
  319. */
  320. if (!enable) {
  321. /*
  322. * deve->se_lun_acl will be NULL for demo-mode created LUNs
  323. * that have not been explicitly concerted to MappedLUNs ->
  324. * struct se_lun_acl, but we remove deve->alua_port_list from
  325. * port->sep_alua_list. This also means that active UAs and
  326. * NodeACL context specific PR metadata for demo-mode
  327. * MappedLUN *deve will be released below..
  328. */
  329. spin_lock_bh(&port->sep_alua_lock);
  330. list_del(&deve->alua_port_list);
  331. spin_unlock_bh(&port->sep_alua_lock);
  332. }
  333. spin_lock_irq(&nacl->device_list_lock);
  334. if (enable) {
  335. /*
  336. * Check if the call is handling demo mode -> explict LUN ACL
  337. * transition. This transition must be for the same struct se_lun
  338. * + mapped_lun that was setup in demo mode..
  339. */
  340. if (deve->lun_flags & TRANSPORT_LUNFLAGS_INITIATOR_ACCESS) {
  341. if (deve->se_lun_acl != NULL) {
  342. pr_err("struct se_dev_entry->se_lun_acl"
  343. " already set for demo mode -> explict"
  344. " LUN ACL transition\n");
  345. spin_unlock_irq(&nacl->device_list_lock);
  346. return -EINVAL;
  347. }
  348. if (deve->se_lun != lun) {
  349. pr_err("struct se_dev_entry->se_lun does"
  350. " match passed struct se_lun for demo mode"
  351. " -> explict LUN ACL transition\n");
  352. spin_unlock_irq(&nacl->device_list_lock);
  353. return -EINVAL;
  354. }
  355. deve->se_lun_acl = lun_acl;
  356. trans = 1;
  357. } else {
  358. deve->se_lun = lun;
  359. deve->se_lun_acl = lun_acl;
  360. deve->mapped_lun = mapped_lun;
  361. deve->lun_flags |= TRANSPORT_LUNFLAGS_INITIATOR_ACCESS;
  362. }
  363. if (lun_access & TRANSPORT_LUNFLAGS_READ_WRITE) {
  364. deve->lun_flags &= ~TRANSPORT_LUNFLAGS_READ_ONLY;
  365. deve->lun_flags |= TRANSPORT_LUNFLAGS_READ_WRITE;
  366. } else {
  367. deve->lun_flags &= ~TRANSPORT_LUNFLAGS_READ_WRITE;
  368. deve->lun_flags |= TRANSPORT_LUNFLAGS_READ_ONLY;
  369. }
  370. if (trans) {
  371. spin_unlock_irq(&nacl->device_list_lock);
  372. return 0;
  373. }
  374. deve->creation_time = get_jiffies_64();
  375. deve->attach_count++;
  376. spin_unlock_irq(&nacl->device_list_lock);
  377. spin_lock_bh(&port->sep_alua_lock);
  378. list_add_tail(&deve->alua_port_list, &port->sep_alua_list);
  379. spin_unlock_bh(&port->sep_alua_lock);
  380. return 0;
  381. }
  382. /*
  383. * Wait for any in process SPEC_I_PT=1 or REGISTER_AND_MOVE
  384. * PR operation to complete.
  385. */
  386. spin_unlock_irq(&nacl->device_list_lock);
  387. while (atomic_read(&deve->pr_ref_count) != 0)
  388. cpu_relax();
  389. spin_lock_irq(&nacl->device_list_lock);
  390. /*
  391. * Disable struct se_dev_entry LUN ACL mapping
  392. */
  393. core_scsi3_ua_release_all(deve);
  394. deve->se_lun = NULL;
  395. deve->se_lun_acl = NULL;
  396. deve->lun_flags = 0;
  397. deve->creation_time = 0;
  398. deve->attach_count--;
  399. spin_unlock_irq(&nacl->device_list_lock);
  400. core_scsi3_free_pr_reg_from_nacl(lun->lun_se_dev, nacl);
  401. return 0;
  402. }
  403. /* core_clear_lun_from_tpg():
  404. *
  405. *
  406. */
  407. void core_clear_lun_from_tpg(struct se_lun *lun, struct se_portal_group *tpg)
  408. {
  409. struct se_node_acl *nacl;
  410. struct se_dev_entry *deve;
  411. u32 i;
  412. spin_lock_irq(&tpg->acl_node_lock);
  413. list_for_each_entry(nacl, &tpg->acl_node_list, acl_list) {
  414. spin_unlock_irq(&tpg->acl_node_lock);
  415. spin_lock_irq(&nacl->device_list_lock);
  416. for (i = 0; i < TRANSPORT_MAX_LUNS_PER_TPG; i++) {
  417. deve = &nacl->device_list[i];
  418. if (lun != deve->se_lun)
  419. continue;
  420. spin_unlock_irq(&nacl->device_list_lock);
  421. core_update_device_list_for_node(lun, NULL,
  422. deve->mapped_lun, TRANSPORT_LUNFLAGS_NO_ACCESS,
  423. nacl, tpg, 0);
  424. spin_lock_irq(&nacl->device_list_lock);
  425. }
  426. spin_unlock_irq(&nacl->device_list_lock);
  427. spin_lock_irq(&tpg->acl_node_lock);
  428. }
  429. spin_unlock_irq(&tpg->acl_node_lock);
  430. }
  431. static struct se_port *core_alloc_port(struct se_device *dev)
  432. {
  433. struct se_port *port, *port_tmp;
  434. port = kzalloc(sizeof(struct se_port), GFP_KERNEL);
  435. if (!port) {
  436. pr_err("Unable to allocate struct se_port\n");
  437. return ERR_PTR(-ENOMEM);
  438. }
  439. INIT_LIST_HEAD(&port->sep_alua_list);
  440. INIT_LIST_HEAD(&port->sep_list);
  441. atomic_set(&port->sep_tg_pt_secondary_offline, 0);
  442. spin_lock_init(&port->sep_alua_lock);
  443. mutex_init(&port->sep_tg_pt_md_mutex);
  444. spin_lock(&dev->se_port_lock);
  445. if (dev->dev_port_count == 0x0000ffff) {
  446. pr_warn("Reached dev->dev_port_count =="
  447. " 0x0000ffff\n");
  448. spin_unlock(&dev->se_port_lock);
  449. return ERR_PTR(-ENOSPC);
  450. }
  451. again:
  452. /*
  453. * Allocate the next RELATIVE TARGET PORT IDENTIFER for this struct se_device
  454. * Here is the table from spc4r17 section 7.7.3.8.
  455. *
  456. * Table 473 -- RELATIVE TARGET PORT IDENTIFIER field
  457. *
  458. * Code Description
  459. * 0h Reserved
  460. * 1h Relative port 1, historically known as port A
  461. * 2h Relative port 2, historically known as port B
  462. * 3h to FFFFh Relative port 3 through 65 535
  463. */
  464. port->sep_rtpi = dev->dev_rpti_counter++;
  465. if (!port->sep_rtpi)
  466. goto again;
  467. list_for_each_entry(port_tmp, &dev->dev_sep_list, sep_list) {
  468. /*
  469. * Make sure RELATIVE TARGET PORT IDENTIFER is unique
  470. * for 16-bit wrap..
  471. */
  472. if (port->sep_rtpi == port_tmp->sep_rtpi)
  473. goto again;
  474. }
  475. spin_unlock(&dev->se_port_lock);
  476. return port;
  477. }
  478. static void core_export_port(
  479. struct se_device *dev,
  480. struct se_portal_group *tpg,
  481. struct se_port *port,
  482. struct se_lun *lun)
  483. {
  484. struct se_subsystem_dev *su_dev = dev->se_sub_dev;
  485. struct t10_alua_tg_pt_gp_member *tg_pt_gp_mem = NULL;
  486. spin_lock(&dev->se_port_lock);
  487. spin_lock(&lun->lun_sep_lock);
  488. port->sep_tpg = tpg;
  489. port->sep_lun = lun;
  490. lun->lun_sep = port;
  491. spin_unlock(&lun->lun_sep_lock);
  492. list_add_tail(&port->sep_list, &dev->dev_sep_list);
  493. spin_unlock(&dev->se_port_lock);
  494. if (su_dev->t10_alua.alua_type == SPC3_ALUA_EMULATED) {
  495. tg_pt_gp_mem = core_alua_allocate_tg_pt_gp_mem(port);
  496. if (IS_ERR(tg_pt_gp_mem) || !tg_pt_gp_mem) {
  497. pr_err("Unable to allocate t10_alua_tg_pt"
  498. "_gp_member_t\n");
  499. return;
  500. }
  501. spin_lock(&tg_pt_gp_mem->tg_pt_gp_mem_lock);
  502. __core_alua_attach_tg_pt_gp_mem(tg_pt_gp_mem,
  503. su_dev->t10_alua.default_tg_pt_gp);
  504. spin_unlock(&tg_pt_gp_mem->tg_pt_gp_mem_lock);
  505. pr_debug("%s/%s: Adding to default ALUA Target Port"
  506. " Group: alua/default_tg_pt_gp\n",
  507. dev->transport->name, tpg->se_tpg_tfo->get_fabric_name());
  508. }
  509. dev->dev_port_count++;
  510. port->sep_index = port->sep_rtpi; /* RELATIVE TARGET PORT IDENTIFER */
  511. }
  512. /*
  513. * Called with struct se_device->se_port_lock spinlock held.
  514. */
  515. static void core_release_port(struct se_device *dev, struct se_port *port)
  516. __releases(&dev->se_port_lock) __acquires(&dev->se_port_lock)
  517. {
  518. /*
  519. * Wait for any port reference for PR ALL_TG_PT=1 operation
  520. * to complete in __core_scsi3_alloc_registration()
  521. */
  522. spin_unlock(&dev->se_port_lock);
  523. if (atomic_read(&port->sep_tg_pt_ref_cnt))
  524. cpu_relax();
  525. spin_lock(&dev->se_port_lock);
  526. core_alua_free_tg_pt_gp_mem(port);
  527. list_del(&port->sep_list);
  528. dev->dev_port_count--;
  529. kfree(port);
  530. }
  531. int core_dev_export(
  532. struct se_device *dev,
  533. struct se_portal_group *tpg,
  534. struct se_lun *lun)
  535. {
  536. struct se_port *port;
  537. port = core_alloc_port(dev);
  538. if (IS_ERR(port))
  539. return PTR_ERR(port);
  540. lun->lun_se_dev = dev;
  541. se_dev_start(dev);
  542. atomic_inc(&dev->dev_export_obj.obj_access_count);
  543. core_export_port(dev, tpg, port, lun);
  544. return 0;
  545. }
  546. void core_dev_unexport(
  547. struct se_device *dev,
  548. struct se_portal_group *tpg,
  549. struct se_lun *lun)
  550. {
  551. struct se_port *port = lun->lun_sep;
  552. spin_lock(&lun->lun_sep_lock);
  553. if (lun->lun_se_dev == NULL) {
  554. spin_unlock(&lun->lun_sep_lock);
  555. return;
  556. }
  557. spin_unlock(&lun->lun_sep_lock);
  558. spin_lock(&dev->se_port_lock);
  559. atomic_dec(&dev->dev_export_obj.obj_access_count);
  560. core_release_port(dev, port);
  561. spin_unlock(&dev->se_port_lock);
  562. se_dev_stop(dev);
  563. lun->lun_se_dev = NULL;
  564. }
  565. int target_report_luns(struct se_task *se_task)
  566. {
  567. struct se_cmd *se_cmd = se_task->task_se_cmd;
  568. struct se_dev_entry *deve;
  569. struct se_lun *se_lun;
  570. struct se_session *se_sess = se_cmd->se_sess;
  571. unsigned char *buf;
  572. u32 lun_count = 0, offset = 8, i;
  573. buf = transport_kmap_data_sg(se_cmd);
  574. if (!buf)
  575. return -ENOMEM;
  576. /*
  577. * If no struct se_session pointer is present, this struct se_cmd is
  578. * coming via a target_core_mod PASSTHROUGH op, and not through
  579. * a $FABRIC_MOD. In that case, report LUN=0 only.
  580. */
  581. if (!se_sess) {
  582. int_to_scsilun(0, (struct scsi_lun *)&buf[offset]);
  583. lun_count = 1;
  584. goto done;
  585. }
  586. spin_lock_irq(&se_sess->se_node_acl->device_list_lock);
  587. for (i = 0; i < TRANSPORT_MAX_LUNS_PER_TPG; i++) {
  588. deve = &se_sess->se_node_acl->device_list[i];
  589. if (!(deve->lun_flags & TRANSPORT_LUNFLAGS_INITIATOR_ACCESS))
  590. continue;
  591. se_lun = deve->se_lun;
  592. /*
  593. * We determine the correct LUN LIST LENGTH even once we
  594. * have reached the initial allocation length.
  595. * See SPC2-R20 7.19.
  596. */
  597. lun_count++;
  598. if ((offset + 8) > se_cmd->data_length)
  599. continue;
  600. int_to_scsilun(deve->mapped_lun, (struct scsi_lun *)&buf[offset]);
  601. offset += 8;
  602. }
  603. spin_unlock_irq(&se_sess->se_node_acl->device_list_lock);
  604. /*
  605. * See SPC3 r07, page 159.
  606. */
  607. done:
  608. lun_count *= 8;
  609. buf[0] = ((lun_count >> 24) & 0xff);
  610. buf[1] = ((lun_count >> 16) & 0xff);
  611. buf[2] = ((lun_count >> 8) & 0xff);
  612. buf[3] = (lun_count & 0xff);
  613. transport_kunmap_data_sg(se_cmd);
  614. se_task->task_scsi_status = GOOD;
  615. transport_complete_task(se_task, 1);
  616. return 0;
  617. }
  618. /* se_release_device_for_hba():
  619. *
  620. *
  621. */
  622. void se_release_device_for_hba(struct se_device *dev)
  623. {
  624. struct se_hba *hba = dev->se_hba;
  625. if ((dev->dev_status & TRANSPORT_DEVICE_ACTIVATED) ||
  626. (dev->dev_status & TRANSPORT_DEVICE_DEACTIVATED) ||
  627. (dev->dev_status & TRANSPORT_DEVICE_SHUTDOWN) ||
  628. (dev->dev_status & TRANSPORT_DEVICE_OFFLINE_ACTIVATED) ||
  629. (dev->dev_status & TRANSPORT_DEVICE_OFFLINE_DEACTIVATED))
  630. se_dev_stop(dev);
  631. if (dev->dev_ptr) {
  632. kthread_stop(dev->process_thread);
  633. if (dev->transport->free_device)
  634. dev->transport->free_device(dev->dev_ptr);
  635. }
  636. spin_lock(&hba->device_lock);
  637. list_del(&dev->dev_list);
  638. hba->dev_count--;
  639. spin_unlock(&hba->device_lock);
  640. core_scsi3_free_all_registrations(dev);
  641. se_release_vpd_for_dev(dev);
  642. kfree(dev);
  643. }
  644. void se_release_vpd_for_dev(struct se_device *dev)
  645. {
  646. struct t10_vpd *vpd, *vpd_tmp;
  647. spin_lock(&dev->se_sub_dev->t10_wwn.t10_vpd_lock);
  648. list_for_each_entry_safe(vpd, vpd_tmp,
  649. &dev->se_sub_dev->t10_wwn.t10_vpd_list, vpd_list) {
  650. list_del(&vpd->vpd_list);
  651. kfree(vpd);
  652. }
  653. spin_unlock(&dev->se_sub_dev->t10_wwn.t10_vpd_lock);
  654. }
  655. /* se_free_virtual_device():
  656. *
  657. * Used for IBLOCK, RAMDISK, and FILEIO Transport Drivers.
  658. */
  659. int se_free_virtual_device(struct se_device *dev, struct se_hba *hba)
  660. {
  661. if (!list_empty(&dev->dev_sep_list))
  662. dump_stack();
  663. core_alua_free_lu_gp_mem(dev);
  664. se_release_device_for_hba(dev);
  665. return 0;
  666. }
  667. static void se_dev_start(struct se_device *dev)
  668. {
  669. struct se_hba *hba = dev->se_hba;
  670. spin_lock(&hba->device_lock);
  671. atomic_inc(&dev->dev_obj.obj_access_count);
  672. if (atomic_read(&dev->dev_obj.obj_access_count) == 1) {
  673. if (dev->dev_status & TRANSPORT_DEVICE_DEACTIVATED) {
  674. dev->dev_status &= ~TRANSPORT_DEVICE_DEACTIVATED;
  675. dev->dev_status |= TRANSPORT_DEVICE_ACTIVATED;
  676. } else if (dev->dev_status &
  677. TRANSPORT_DEVICE_OFFLINE_DEACTIVATED) {
  678. dev->dev_status &=
  679. ~TRANSPORT_DEVICE_OFFLINE_DEACTIVATED;
  680. dev->dev_status |= TRANSPORT_DEVICE_OFFLINE_ACTIVATED;
  681. }
  682. }
  683. spin_unlock(&hba->device_lock);
  684. }
  685. static void se_dev_stop(struct se_device *dev)
  686. {
  687. struct se_hba *hba = dev->se_hba;
  688. spin_lock(&hba->device_lock);
  689. atomic_dec(&dev->dev_obj.obj_access_count);
  690. if (atomic_read(&dev->dev_obj.obj_access_count) == 0) {
  691. if (dev->dev_status & TRANSPORT_DEVICE_ACTIVATED) {
  692. dev->dev_status &= ~TRANSPORT_DEVICE_ACTIVATED;
  693. dev->dev_status |= TRANSPORT_DEVICE_DEACTIVATED;
  694. } else if (dev->dev_status &
  695. TRANSPORT_DEVICE_OFFLINE_ACTIVATED) {
  696. dev->dev_status &= ~TRANSPORT_DEVICE_OFFLINE_ACTIVATED;
  697. dev->dev_status |= TRANSPORT_DEVICE_OFFLINE_DEACTIVATED;
  698. }
  699. }
  700. spin_unlock(&hba->device_lock);
  701. }
  702. int se_dev_check_online(struct se_device *dev)
  703. {
  704. unsigned long flags;
  705. int ret;
  706. spin_lock_irqsave(&dev->dev_status_lock, flags);
  707. ret = ((dev->dev_status & TRANSPORT_DEVICE_ACTIVATED) ||
  708. (dev->dev_status & TRANSPORT_DEVICE_DEACTIVATED)) ? 0 : 1;
  709. spin_unlock_irqrestore(&dev->dev_status_lock, flags);
  710. return ret;
  711. }
  712. int se_dev_check_shutdown(struct se_device *dev)
  713. {
  714. int ret;
  715. spin_lock_irq(&dev->dev_status_lock);
  716. ret = (dev->dev_status & TRANSPORT_DEVICE_SHUTDOWN);
  717. spin_unlock_irq(&dev->dev_status_lock);
  718. return ret;
  719. }
  720. u32 se_dev_align_max_sectors(u32 max_sectors, u32 block_size)
  721. {
  722. u32 tmp, aligned_max_sectors;
  723. /*
  724. * Limit max_sectors to a PAGE_SIZE aligned value for modern
  725. * transport_allocate_data_tasks() operation.
  726. */
  727. tmp = rounddown((max_sectors * block_size), PAGE_SIZE);
  728. aligned_max_sectors = (tmp / block_size);
  729. if (max_sectors != aligned_max_sectors) {
  730. printk(KERN_INFO "Rounding down aligned max_sectors from %u"
  731. " to %u\n", max_sectors, aligned_max_sectors);
  732. return aligned_max_sectors;
  733. }
  734. return max_sectors;
  735. }
  736. void se_dev_set_default_attribs(
  737. struct se_device *dev,
  738. struct se_dev_limits *dev_limits)
  739. {
  740. struct queue_limits *limits = &dev_limits->limits;
  741. dev->se_sub_dev->se_dev_attrib.emulate_dpo = DA_EMULATE_DPO;
  742. dev->se_sub_dev->se_dev_attrib.emulate_fua_write = DA_EMULATE_FUA_WRITE;
  743. dev->se_sub_dev->se_dev_attrib.emulate_fua_read = DA_EMULATE_FUA_READ;
  744. dev->se_sub_dev->se_dev_attrib.emulate_write_cache = DA_EMULATE_WRITE_CACHE;
  745. dev->se_sub_dev->se_dev_attrib.emulate_ua_intlck_ctrl = DA_EMULATE_UA_INTLLCK_CTRL;
  746. dev->se_sub_dev->se_dev_attrib.emulate_tas = DA_EMULATE_TAS;
  747. dev->se_sub_dev->se_dev_attrib.emulate_tpu = DA_EMULATE_TPU;
  748. dev->se_sub_dev->se_dev_attrib.emulate_tpws = DA_EMULATE_TPWS;
  749. dev->se_sub_dev->se_dev_attrib.emulate_reservations = DA_EMULATE_RESERVATIONS;
  750. dev->se_sub_dev->se_dev_attrib.emulate_alua = DA_EMULATE_ALUA;
  751. dev->se_sub_dev->se_dev_attrib.enforce_pr_isids = DA_ENFORCE_PR_ISIDS;
  752. dev->se_sub_dev->se_dev_attrib.is_nonrot = DA_IS_NONROT;
  753. dev->se_sub_dev->se_dev_attrib.emulate_rest_reord = DA_EMULATE_REST_REORD;
  754. /*
  755. * The TPU=1 and TPWS=1 settings will be set in TCM/IBLOCK
  756. * iblock_create_virtdevice() from struct queue_limits values
  757. * if blk_queue_discard()==1
  758. */
  759. dev->se_sub_dev->se_dev_attrib.max_unmap_lba_count = DA_MAX_UNMAP_LBA_COUNT;
  760. dev->se_sub_dev->se_dev_attrib.max_unmap_block_desc_count =
  761. DA_MAX_UNMAP_BLOCK_DESC_COUNT;
  762. dev->se_sub_dev->se_dev_attrib.unmap_granularity = DA_UNMAP_GRANULARITY_DEFAULT;
  763. dev->se_sub_dev->se_dev_attrib.unmap_granularity_alignment =
  764. DA_UNMAP_GRANULARITY_ALIGNMENT_DEFAULT;
  765. /*
  766. * block_size is based on subsystem plugin dependent requirements.
  767. */
  768. dev->se_sub_dev->se_dev_attrib.hw_block_size = limits->logical_block_size;
  769. dev->se_sub_dev->se_dev_attrib.block_size = limits->logical_block_size;
  770. /*
  771. * max_sectors is based on subsystem plugin dependent requirements.
  772. */
  773. dev->se_sub_dev->se_dev_attrib.hw_max_sectors = limits->max_hw_sectors;
  774. /*
  775. * Align max_sectors down to PAGE_SIZE to follow transport_allocate_data_tasks()
  776. */
  777. limits->max_sectors = se_dev_align_max_sectors(limits->max_sectors,
  778. limits->logical_block_size);
  779. dev->se_sub_dev->se_dev_attrib.max_sectors = limits->max_sectors;
  780. /*
  781. * Set fabric_max_sectors, which is reported in block limits
  782. * VPD page (B0h).
  783. */
  784. dev->se_sub_dev->se_dev_attrib.fabric_max_sectors = DA_FABRIC_MAX_SECTORS;
  785. /*
  786. * Set optimal_sectors from fabric_max_sectors, which can be
  787. * lowered via configfs.
  788. */
  789. dev->se_sub_dev->se_dev_attrib.optimal_sectors = DA_FABRIC_MAX_SECTORS;
  790. /*
  791. * queue_depth is based on subsystem plugin dependent requirements.
  792. */
  793. dev->se_sub_dev->se_dev_attrib.hw_queue_depth = dev_limits->hw_queue_depth;
  794. dev->se_sub_dev->se_dev_attrib.queue_depth = dev_limits->queue_depth;
  795. }
  796. int se_dev_set_max_unmap_lba_count(
  797. struct se_device *dev,
  798. u32 max_unmap_lba_count)
  799. {
  800. dev->se_sub_dev->se_dev_attrib.max_unmap_lba_count = max_unmap_lba_count;
  801. pr_debug("dev[%p]: Set max_unmap_lba_count: %u\n",
  802. dev, dev->se_sub_dev->se_dev_attrib.max_unmap_lba_count);
  803. return 0;
  804. }
  805. int se_dev_set_max_unmap_block_desc_count(
  806. struct se_device *dev,
  807. u32 max_unmap_block_desc_count)
  808. {
  809. dev->se_sub_dev->se_dev_attrib.max_unmap_block_desc_count =
  810. max_unmap_block_desc_count;
  811. pr_debug("dev[%p]: Set max_unmap_block_desc_count: %u\n",
  812. dev, dev->se_sub_dev->se_dev_attrib.max_unmap_block_desc_count);
  813. return 0;
  814. }
  815. int se_dev_set_unmap_granularity(
  816. struct se_device *dev,
  817. u32 unmap_granularity)
  818. {
  819. dev->se_sub_dev->se_dev_attrib.unmap_granularity = unmap_granularity;
  820. pr_debug("dev[%p]: Set unmap_granularity: %u\n",
  821. dev, dev->se_sub_dev->se_dev_attrib.unmap_granularity);
  822. return 0;
  823. }
  824. int se_dev_set_unmap_granularity_alignment(
  825. struct se_device *dev,
  826. u32 unmap_granularity_alignment)
  827. {
  828. dev->se_sub_dev->se_dev_attrib.unmap_granularity_alignment = unmap_granularity_alignment;
  829. pr_debug("dev[%p]: Set unmap_granularity_alignment: %u\n",
  830. dev, dev->se_sub_dev->se_dev_attrib.unmap_granularity_alignment);
  831. return 0;
  832. }
  833. int se_dev_set_emulate_dpo(struct se_device *dev, int flag)
  834. {
  835. if (flag != 0 && flag != 1) {
  836. pr_err("Illegal value %d\n", flag);
  837. return -EINVAL;
  838. }
  839. if (flag) {
  840. pr_err("dpo_emulated not supported\n");
  841. return -EINVAL;
  842. }
  843. return 0;
  844. }
  845. int se_dev_set_emulate_fua_write(struct se_device *dev, int flag)
  846. {
  847. if (flag != 0 && flag != 1) {
  848. pr_err("Illegal value %d\n", flag);
  849. return -EINVAL;
  850. }
  851. if (flag && dev->transport->fua_write_emulated == 0) {
  852. pr_err("fua_write_emulated not supported\n");
  853. return -EINVAL;
  854. }
  855. dev->se_sub_dev->se_dev_attrib.emulate_fua_write = flag;
  856. pr_debug("dev[%p]: SE Device Forced Unit Access WRITEs: %d\n",
  857. dev, dev->se_sub_dev->se_dev_attrib.emulate_fua_write);
  858. return 0;
  859. }
  860. int se_dev_set_emulate_fua_read(struct se_device *dev, int flag)
  861. {
  862. if (flag != 0 && flag != 1) {
  863. pr_err("Illegal value %d\n", flag);
  864. return -EINVAL;
  865. }
  866. if (flag) {
  867. pr_err("ua read emulated not supported\n");
  868. return -EINVAL;
  869. }
  870. return 0;
  871. }
  872. int se_dev_set_emulate_write_cache(struct se_device *dev, int flag)
  873. {
  874. if (flag != 0 && flag != 1) {
  875. pr_err("Illegal value %d\n", flag);
  876. return -EINVAL;
  877. }
  878. if (flag && dev->transport->write_cache_emulated == 0) {
  879. pr_err("write_cache_emulated not supported\n");
  880. return -EINVAL;
  881. }
  882. dev->se_sub_dev->se_dev_attrib.emulate_write_cache = flag;
  883. pr_debug("dev[%p]: SE Device WRITE_CACHE_EMULATION flag: %d\n",
  884. dev, dev->se_sub_dev->se_dev_attrib.emulate_write_cache);
  885. return 0;
  886. }
  887. int se_dev_set_emulate_ua_intlck_ctrl(struct se_device *dev, int flag)
  888. {
  889. if ((flag != 0) && (flag != 1) && (flag != 2)) {
  890. pr_err("Illegal value %d\n", flag);
  891. return -EINVAL;
  892. }
  893. if (atomic_read(&dev->dev_export_obj.obj_access_count)) {
  894. pr_err("dev[%p]: Unable to change SE Device"
  895. " UA_INTRLCK_CTRL while dev_export_obj: %d count"
  896. " exists\n", dev,
  897. atomic_read(&dev->dev_export_obj.obj_access_count));
  898. return -EINVAL;
  899. }
  900. dev->se_sub_dev->se_dev_attrib.emulate_ua_intlck_ctrl = flag;
  901. pr_debug("dev[%p]: SE Device UA_INTRLCK_CTRL flag: %d\n",
  902. dev, dev->se_sub_dev->se_dev_attrib.emulate_ua_intlck_ctrl);
  903. return 0;
  904. }
  905. int se_dev_set_emulate_tas(struct se_device *dev, int flag)
  906. {
  907. if ((flag != 0) && (flag != 1)) {
  908. pr_err("Illegal value %d\n", flag);
  909. return -EINVAL;
  910. }
  911. if (atomic_read(&dev->dev_export_obj.obj_access_count)) {
  912. pr_err("dev[%p]: Unable to change SE Device TAS while"
  913. " dev_export_obj: %d count exists\n", dev,
  914. atomic_read(&dev->dev_export_obj.obj_access_count));
  915. return -EINVAL;
  916. }
  917. dev->se_sub_dev->se_dev_attrib.emulate_tas = flag;
  918. pr_debug("dev[%p]: SE Device TASK_ABORTED status bit: %s\n",
  919. dev, (dev->se_sub_dev->se_dev_attrib.emulate_tas) ? "Enabled" : "Disabled");
  920. return 0;
  921. }
  922. int se_dev_set_emulate_tpu(struct se_device *dev, int flag)
  923. {
  924. if ((flag != 0) && (flag != 1)) {
  925. pr_err("Illegal value %d\n", flag);
  926. return -EINVAL;
  927. }
  928. /*
  929. * We expect this value to be non-zero when generic Block Layer
  930. * Discard supported is detected iblock_create_virtdevice().
  931. */
  932. if (flag && !dev->se_sub_dev->se_dev_attrib.max_unmap_block_desc_count) {
  933. pr_err("Generic Block Discard not supported\n");
  934. return -ENOSYS;
  935. }
  936. dev->se_sub_dev->se_dev_attrib.emulate_tpu = flag;
  937. pr_debug("dev[%p]: SE Device Thin Provisioning UNMAP bit: %d\n",
  938. dev, flag);
  939. return 0;
  940. }
  941. int se_dev_set_emulate_tpws(struct se_device *dev, int flag)
  942. {
  943. if ((flag != 0) && (flag != 1)) {
  944. pr_err("Illegal value %d\n", flag);
  945. return -EINVAL;
  946. }
  947. /*
  948. * We expect this value to be non-zero when generic Block Layer
  949. * Discard supported is detected iblock_create_virtdevice().
  950. */
  951. if (flag && !dev->se_sub_dev->se_dev_attrib.max_unmap_block_desc_count) {
  952. pr_err("Generic Block Discard not supported\n");
  953. return -ENOSYS;
  954. }
  955. dev->se_sub_dev->se_dev_attrib.emulate_tpws = flag;
  956. pr_debug("dev[%p]: SE Device Thin Provisioning WRITE_SAME: %d\n",
  957. dev, flag);
  958. return 0;
  959. }
  960. int se_dev_set_enforce_pr_isids(struct se_device *dev, int flag)
  961. {
  962. if ((flag != 0) && (flag != 1)) {
  963. pr_err("Illegal value %d\n", flag);
  964. return -EINVAL;
  965. }
  966. dev->se_sub_dev->se_dev_attrib.enforce_pr_isids = flag;
  967. pr_debug("dev[%p]: SE Device enforce_pr_isids bit: %s\n", dev,
  968. (dev->se_sub_dev->se_dev_attrib.enforce_pr_isids) ? "Enabled" : "Disabled");
  969. return 0;
  970. }
  971. int se_dev_set_is_nonrot(struct se_device *dev, int flag)
  972. {
  973. if ((flag != 0) && (flag != 1)) {
  974. printk(KERN_ERR "Illegal value %d\n", flag);
  975. return -EINVAL;
  976. }
  977. dev->se_sub_dev->se_dev_attrib.is_nonrot = flag;
  978. pr_debug("dev[%p]: SE Device is_nonrot bit: %d\n",
  979. dev, flag);
  980. return 0;
  981. }
  982. int se_dev_set_emulate_rest_reord(struct se_device *dev, int flag)
  983. {
  984. if (flag != 0) {
  985. printk(KERN_ERR "dev[%p]: SE Device emulatation of restricted"
  986. " reordering not implemented\n", dev);
  987. return -ENOSYS;
  988. }
  989. dev->se_sub_dev->se_dev_attrib.emulate_rest_reord = flag;
  990. pr_debug("dev[%p]: SE Device emulate_rest_reord: %d\n", dev, flag);
  991. return 0;
  992. }
  993. /*
  994. * Note, this can only be called on unexported SE Device Object.
  995. */
  996. int se_dev_set_queue_depth(struct se_device *dev, u32 queue_depth)
  997. {
  998. if (atomic_read(&dev->dev_export_obj.obj_access_count)) {
  999. pr_err("dev[%p]: Unable to change SE Device TCQ while"
  1000. " dev_export_obj: %d count exists\n", dev,
  1001. atomic_read(&dev->dev_export_obj.obj_access_count));
  1002. return -EINVAL;
  1003. }
  1004. if (!queue_depth) {
  1005. pr_err("dev[%p]: Illegal ZERO value for queue"
  1006. "_depth\n", dev);
  1007. return -EINVAL;
  1008. }
  1009. if (dev->transport->transport_type == TRANSPORT_PLUGIN_PHBA_PDEV) {
  1010. if (queue_depth > dev->se_sub_dev->se_dev_attrib.hw_queue_depth) {
  1011. pr_err("dev[%p]: Passed queue_depth: %u"
  1012. " exceeds TCM/SE_Device TCQ: %u\n",
  1013. dev, queue_depth,
  1014. dev->se_sub_dev->se_dev_attrib.hw_queue_depth);
  1015. return -EINVAL;
  1016. }
  1017. } else {
  1018. if (queue_depth > dev->se_sub_dev->se_dev_attrib.queue_depth) {
  1019. if (queue_depth > dev->se_sub_dev->se_dev_attrib.hw_queue_depth) {
  1020. pr_err("dev[%p]: Passed queue_depth:"
  1021. " %u exceeds TCM/SE_Device MAX"
  1022. " TCQ: %u\n", dev, queue_depth,
  1023. dev->se_sub_dev->se_dev_attrib.hw_queue_depth);
  1024. return -EINVAL;
  1025. }
  1026. }
  1027. }
  1028. dev->se_sub_dev->se_dev_attrib.queue_depth = dev->queue_depth = queue_depth;
  1029. pr_debug("dev[%p]: SE Device TCQ Depth changed to: %u\n",
  1030. dev, queue_depth);
  1031. return 0;
  1032. }
  1033. int se_dev_set_max_sectors(struct se_device *dev, u32 max_sectors)
  1034. {
  1035. int force = 0; /* Force setting for VDEVS */
  1036. if (atomic_read(&dev->dev_export_obj.obj_access_count)) {
  1037. pr_err("dev[%p]: Unable to change SE Device"
  1038. " max_sectors while dev_export_obj: %d count exists\n",
  1039. dev, atomic_read(&dev->dev_export_obj.obj_access_count));
  1040. return -EINVAL;
  1041. }
  1042. if (!max_sectors) {
  1043. pr_err("dev[%p]: Illegal ZERO value for"
  1044. " max_sectors\n", dev);
  1045. return -EINVAL;
  1046. }
  1047. if (max_sectors < DA_STATUS_MAX_SECTORS_MIN) {
  1048. pr_err("dev[%p]: Passed max_sectors: %u less than"
  1049. " DA_STATUS_MAX_SECTORS_MIN: %u\n", dev, max_sectors,
  1050. DA_STATUS_MAX_SECTORS_MIN);
  1051. return -EINVAL;
  1052. }
  1053. if (dev->transport->transport_type == TRANSPORT_PLUGIN_PHBA_PDEV) {
  1054. if (max_sectors > dev->se_sub_dev->se_dev_attrib.hw_max_sectors) {
  1055. pr_err("dev[%p]: Passed max_sectors: %u"
  1056. " greater than TCM/SE_Device max_sectors:"
  1057. " %u\n", dev, max_sectors,
  1058. dev->se_sub_dev->se_dev_attrib.hw_max_sectors);
  1059. return -EINVAL;
  1060. }
  1061. } else {
  1062. if (!force && (max_sectors >
  1063. dev->se_sub_dev->se_dev_attrib.hw_max_sectors)) {
  1064. pr_err("dev[%p]: Passed max_sectors: %u"
  1065. " greater than TCM/SE_Device max_sectors"
  1066. ": %u, use force=1 to override.\n", dev,
  1067. max_sectors, dev->se_sub_dev->se_dev_attrib.hw_max_sectors);
  1068. return -EINVAL;
  1069. }
  1070. if (max_sectors > DA_STATUS_MAX_SECTORS_MAX) {
  1071. pr_err("dev[%p]: Passed max_sectors: %u"
  1072. " greater than DA_STATUS_MAX_SECTORS_MAX:"
  1073. " %u\n", dev, max_sectors,
  1074. DA_STATUS_MAX_SECTORS_MAX);
  1075. return -EINVAL;
  1076. }
  1077. }
  1078. /*
  1079. * Align max_sectors down to PAGE_SIZE to follow transport_allocate_data_tasks()
  1080. */
  1081. max_sectors = se_dev_align_max_sectors(max_sectors,
  1082. dev->se_sub_dev->se_dev_attrib.block_size);
  1083. dev->se_sub_dev->se_dev_attrib.max_sectors = max_sectors;
  1084. pr_debug("dev[%p]: SE Device max_sectors changed to %u\n",
  1085. dev, max_sectors);
  1086. return 0;
  1087. }
  1088. int se_dev_set_fabric_max_sectors(struct se_device *dev, u32 fabric_max_sectors)
  1089. {
  1090. if (atomic_read(&dev->dev_export_obj.obj_access_count)) {
  1091. pr_err("dev[%p]: Unable to change SE Device"
  1092. " fabric_max_sectors while dev_export_obj: %d count exists\n",
  1093. dev, atomic_read(&dev->dev_export_obj.obj_access_count));
  1094. return -EINVAL;
  1095. }
  1096. if (!fabric_max_sectors) {
  1097. pr_err("dev[%p]: Illegal ZERO value for"
  1098. " fabric_max_sectors\n", dev);
  1099. return -EINVAL;
  1100. }
  1101. if (fabric_max_sectors < DA_STATUS_MAX_SECTORS_MIN) {
  1102. pr_err("dev[%p]: Passed fabric_max_sectors: %u less than"
  1103. " DA_STATUS_MAX_SECTORS_MIN: %u\n", dev, fabric_max_sectors,
  1104. DA_STATUS_MAX_SECTORS_MIN);
  1105. return -EINVAL;
  1106. }
  1107. if (dev->transport->transport_type == TRANSPORT_PLUGIN_PHBA_PDEV) {
  1108. if (fabric_max_sectors > dev->se_sub_dev->se_dev_attrib.hw_max_sectors) {
  1109. pr_err("dev[%p]: Passed fabric_max_sectors: %u"
  1110. " greater than TCM/SE_Device max_sectors:"
  1111. " %u\n", dev, fabric_max_sectors,
  1112. dev->se_sub_dev->se_dev_attrib.hw_max_sectors);
  1113. return -EINVAL;
  1114. }
  1115. } else {
  1116. if (fabric_max_sectors > DA_STATUS_MAX_SECTORS_MAX) {
  1117. pr_err("dev[%p]: Passed fabric_max_sectors: %u"
  1118. " greater than DA_STATUS_MAX_SECTORS_MAX:"
  1119. " %u\n", dev, fabric_max_sectors,
  1120. DA_STATUS_MAX_SECTORS_MAX);
  1121. return -EINVAL;
  1122. }
  1123. }
  1124. /*
  1125. * Align max_sectors down to PAGE_SIZE to follow transport_allocate_data_tasks()
  1126. */
  1127. fabric_max_sectors = se_dev_align_max_sectors(fabric_max_sectors,
  1128. dev->se_sub_dev->se_dev_attrib.block_size);
  1129. dev->se_sub_dev->se_dev_attrib.fabric_max_sectors = fabric_max_sectors;
  1130. pr_debug("dev[%p]: SE Device max_sectors changed to %u\n",
  1131. dev, fabric_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. pr_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 (dev->transport->transport_type == TRANSPORT_PLUGIN_PHBA_PDEV) {
  1143. pr_err("dev[%p]: Passed optimal_sectors cannot be"
  1144. " changed for TCM/pSCSI\n", dev);
  1145. return -EINVAL;
  1146. }
  1147. if (optimal_sectors > dev->se_sub_dev->se_dev_attrib.fabric_max_sectors) {
  1148. pr_err("dev[%p]: Passed optimal_sectors %u cannot be"
  1149. " greater than fabric_max_sectors: %u\n", dev,
  1150. optimal_sectors, dev->se_sub_dev->se_dev_attrib.fabric_max_sectors);
  1151. return -EINVAL;
  1152. }
  1153. dev->se_sub_dev->se_dev_attrib.optimal_sectors = optimal_sectors;
  1154. pr_debug("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. pr_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 -EINVAL;
  1165. }
  1166. if ((block_size != 512) &&
  1167. (block_size != 1024) &&
  1168. (block_size != 2048) &&
  1169. (block_size != 4096)) {
  1170. pr_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 -EINVAL;
  1174. }
  1175. if (dev->transport->transport_type == TRANSPORT_PLUGIN_PHBA_PDEV) {
  1176. pr_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 -EINVAL;
  1180. }
  1181. dev->se_sub_dev->se_dev_attrib.block_size = block_size;
  1182. pr_debug("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. int rc;
  1195. if (atomic_read(&dev->dev_access_obj.obj_access_count) != 0) {
  1196. pr_err("Unable to export struct se_device while dev_access_obj: %d\n",
  1197. atomic_read(&dev->dev_access_obj.obj_access_count));
  1198. return ERR_PTR(-EACCES);
  1199. }
  1200. lun_p = core_tpg_pre_addlun(tpg, lun);
  1201. if (IS_ERR(lun_p))
  1202. return lun_p;
  1203. if (dev->dev_flags & DF_READ_ONLY)
  1204. lun_access = TRANSPORT_LUNFLAGS_READ_ONLY;
  1205. else
  1206. lun_access = TRANSPORT_LUNFLAGS_READ_WRITE;
  1207. rc = core_tpg_post_addlun(tpg, lun_p, lun_access, dev);
  1208. if (rc < 0)
  1209. return ERR_PTR(rc);
  1210. pr_debug("%s_TPG[%u]_LUN[%u] - Activated %s Logical Unit from"
  1211. " CORE HBA: %u\n", tpg->se_tpg_tfo->get_fabric_name(),
  1212. tpg->se_tpg_tfo->tpg_get_tag(tpg), lun_p->unpacked_lun,
  1213. tpg->se_tpg_tfo->get_fabric_name(), hba->hba_id);
  1214. /*
  1215. * Update LUN maps for dynamically added initiators when
  1216. * generate_node_acl is enabled.
  1217. */
  1218. if (tpg->se_tpg_tfo->tpg_check_demo_mode(tpg)) {
  1219. struct se_node_acl *acl;
  1220. spin_lock_irq(&tpg->acl_node_lock);
  1221. list_for_each_entry(acl, &tpg->acl_node_list, acl_list) {
  1222. if (acl->dynamic_node_acl &&
  1223. (!tpg->se_tpg_tfo->tpg_check_demo_mode_login_only ||
  1224. !tpg->se_tpg_tfo->tpg_check_demo_mode_login_only(tpg))) {
  1225. spin_unlock_irq(&tpg->acl_node_lock);
  1226. core_tpg_add_node_to_devs(acl, tpg);
  1227. spin_lock_irq(&tpg->acl_node_lock);
  1228. }
  1229. }
  1230. spin_unlock_irq(&tpg->acl_node_lock);
  1231. }
  1232. return lun_p;
  1233. }
  1234. /* core_dev_del_lun():
  1235. *
  1236. *
  1237. */
  1238. int core_dev_del_lun(
  1239. struct se_portal_group *tpg,
  1240. u32 unpacked_lun)
  1241. {
  1242. struct se_lun *lun;
  1243. lun = core_tpg_pre_dellun(tpg, unpacked_lun);
  1244. if (IS_ERR(lun))
  1245. return PTR_ERR(lun);
  1246. core_tpg_post_dellun(tpg, lun);
  1247. pr_debug("%s_TPG[%u]_LUN[%u] - Deactivated %s Logical Unit from"
  1248. " device object\n", tpg->se_tpg_tfo->get_fabric_name(),
  1249. tpg->se_tpg_tfo->tpg_get_tag(tpg), unpacked_lun,
  1250. tpg->se_tpg_tfo->get_fabric_name());
  1251. return 0;
  1252. }
  1253. struct se_lun *core_get_lun_from_tpg(struct se_portal_group *tpg, u32 unpacked_lun)
  1254. {
  1255. struct se_lun *lun;
  1256. spin_lock(&tpg->tpg_lun_lock);
  1257. if (unpacked_lun > (TRANSPORT_MAX_LUNS_PER_TPG-1)) {
  1258. pr_err("%s LUN: %u exceeds TRANSPORT_MAX_LUNS"
  1259. "_PER_TPG-1: %u for Target Portal Group: %hu\n",
  1260. tpg->se_tpg_tfo->get_fabric_name(), unpacked_lun,
  1261. TRANSPORT_MAX_LUNS_PER_TPG-1,
  1262. tpg->se_tpg_tfo->tpg_get_tag(tpg));
  1263. spin_unlock(&tpg->tpg_lun_lock);
  1264. return NULL;
  1265. }
  1266. lun = &tpg->tpg_lun_list[unpacked_lun];
  1267. if (lun->lun_status != TRANSPORT_LUN_STATUS_FREE) {
  1268. pr_err("%s Logical Unit Number: %u is not free on"
  1269. " Target Portal Group: %hu, ignoring request.\n",
  1270. tpg->se_tpg_tfo->get_fabric_name(), unpacked_lun,
  1271. tpg->se_tpg_tfo->tpg_get_tag(tpg));
  1272. spin_unlock(&tpg->tpg_lun_lock);
  1273. return NULL;
  1274. }
  1275. spin_unlock(&tpg->tpg_lun_lock);
  1276. return lun;
  1277. }
  1278. /* core_dev_get_lun():
  1279. *
  1280. *
  1281. */
  1282. static struct se_lun *core_dev_get_lun(struct se_portal_group *tpg, u32 unpacked_lun)
  1283. {
  1284. struct se_lun *lun;
  1285. spin_lock(&tpg->tpg_lun_lock);
  1286. if (unpacked_lun > (TRANSPORT_MAX_LUNS_PER_TPG-1)) {
  1287. pr_err("%s LUN: %u exceeds TRANSPORT_MAX_LUNS_PER"
  1288. "_TPG-1: %u for Target Portal Group: %hu\n",
  1289. tpg->se_tpg_tfo->get_fabric_name(), unpacked_lun,
  1290. TRANSPORT_MAX_LUNS_PER_TPG-1,
  1291. tpg->se_tpg_tfo->tpg_get_tag(tpg));
  1292. spin_unlock(&tpg->tpg_lun_lock);
  1293. return NULL;
  1294. }
  1295. lun = &tpg->tpg_lun_list[unpacked_lun];
  1296. if (lun->lun_status != TRANSPORT_LUN_STATUS_ACTIVE) {
  1297. pr_err("%s Logical Unit Number: %u is not active on"
  1298. " Target Portal Group: %hu, ignoring request.\n",
  1299. tpg->se_tpg_tfo->get_fabric_name(), unpacked_lun,
  1300. tpg->se_tpg_tfo->tpg_get_tag(tpg));
  1301. spin_unlock(&tpg->tpg_lun_lock);
  1302. return NULL;
  1303. }
  1304. spin_unlock(&tpg->tpg_lun_lock);
  1305. return lun;
  1306. }
  1307. struct se_lun_acl *core_dev_init_initiator_node_lun_acl(
  1308. struct se_portal_group *tpg,
  1309. u32 mapped_lun,
  1310. char *initiatorname,
  1311. int *ret)
  1312. {
  1313. struct se_lun_acl *lacl;
  1314. struct se_node_acl *nacl;
  1315. if (strlen(initiatorname) >= TRANSPORT_IQN_LEN) {
  1316. pr_err("%s InitiatorName exceeds maximum size.\n",
  1317. tpg->se_tpg_tfo->get_fabric_name());
  1318. *ret = -EOVERFLOW;
  1319. return NULL;
  1320. }
  1321. nacl = core_tpg_get_initiator_node_acl(tpg, initiatorname);
  1322. if (!nacl) {
  1323. *ret = -EINVAL;
  1324. return NULL;
  1325. }
  1326. lacl = kzalloc(sizeof(struct se_lun_acl), GFP_KERNEL);
  1327. if (!lacl) {
  1328. pr_err("Unable to allocate memory for struct se_lun_acl.\n");
  1329. *ret = -ENOMEM;
  1330. return NULL;
  1331. }
  1332. INIT_LIST_HEAD(&lacl->lacl_list);
  1333. lacl->mapped_lun = mapped_lun;
  1334. lacl->se_lun_nacl = nacl;
  1335. snprintf(lacl->initiatorname, TRANSPORT_IQN_LEN, "%s", initiatorname);
  1336. return lacl;
  1337. }
  1338. int core_dev_add_initiator_node_lun_acl(
  1339. struct se_portal_group *tpg,
  1340. struct se_lun_acl *lacl,
  1341. u32 unpacked_lun,
  1342. u32 lun_access)
  1343. {
  1344. struct se_lun *lun;
  1345. struct se_node_acl *nacl;
  1346. lun = core_dev_get_lun(tpg, unpacked_lun);
  1347. if (!lun) {
  1348. pr_err("%s Logical Unit Number: %u is not active on"
  1349. " Target Portal Group: %hu, ignoring request.\n",
  1350. tpg->se_tpg_tfo->get_fabric_name(), unpacked_lun,
  1351. tpg->se_tpg_tfo->tpg_get_tag(tpg));
  1352. return -EINVAL;
  1353. }
  1354. nacl = lacl->se_lun_nacl;
  1355. if (!nacl)
  1356. return -EINVAL;
  1357. if ((lun->lun_access & TRANSPORT_LUNFLAGS_READ_ONLY) &&
  1358. (lun_access & TRANSPORT_LUNFLAGS_READ_WRITE))
  1359. lun_access = TRANSPORT_LUNFLAGS_READ_ONLY;
  1360. lacl->se_lun = lun;
  1361. if (core_update_device_list_for_node(lun, lacl, lacl->mapped_lun,
  1362. lun_access, nacl, tpg, 1) < 0)
  1363. return -EINVAL;
  1364. spin_lock(&lun->lun_acl_lock);
  1365. list_add_tail(&lacl->lacl_list, &lun->lun_acl_list);
  1366. atomic_inc(&lun->lun_acl_count);
  1367. smp_mb__after_atomic_inc();
  1368. spin_unlock(&lun->lun_acl_lock);
  1369. pr_debug("%s_TPG[%hu]_LUN[%u->%u] - Added %s ACL for "
  1370. " InitiatorNode: %s\n", tpg->se_tpg_tfo->get_fabric_name(),
  1371. tpg->se_tpg_tfo->tpg_get_tag(tpg), unpacked_lun, lacl->mapped_lun,
  1372. (lun_access & TRANSPORT_LUNFLAGS_READ_WRITE) ? "RW" : "RO",
  1373. lacl->initiatorname);
  1374. /*
  1375. * Check to see if there are any existing persistent reservation APTPL
  1376. * pre-registrations that need to be enabled for this LUN ACL..
  1377. */
  1378. core_scsi3_check_aptpl_registration(lun->lun_se_dev, tpg, lun, lacl);
  1379. return 0;
  1380. }
  1381. /* core_dev_del_initiator_node_lun_acl():
  1382. *
  1383. *
  1384. */
  1385. int core_dev_del_initiator_node_lun_acl(
  1386. struct se_portal_group *tpg,
  1387. struct se_lun *lun,
  1388. struct se_lun_acl *lacl)
  1389. {
  1390. struct se_node_acl *nacl;
  1391. nacl = lacl->se_lun_nacl;
  1392. if (!nacl)
  1393. return -EINVAL;
  1394. spin_lock(&lun->lun_acl_lock);
  1395. list_del(&lacl->lacl_list);
  1396. atomic_dec(&lun->lun_acl_count);
  1397. smp_mb__after_atomic_dec();
  1398. spin_unlock(&lun->lun_acl_lock);
  1399. core_update_device_list_for_node(lun, NULL, lacl->mapped_lun,
  1400. TRANSPORT_LUNFLAGS_NO_ACCESS, nacl, tpg, 0);
  1401. lacl->se_lun = NULL;
  1402. pr_debug("%s_TPG[%hu]_LUN[%u] - Removed ACL for"
  1403. " InitiatorNode: %s Mapped LUN: %u\n",
  1404. tpg->se_tpg_tfo->get_fabric_name(),
  1405. tpg->se_tpg_tfo->tpg_get_tag(tpg), lun->unpacked_lun,
  1406. lacl->initiatorname, lacl->mapped_lun);
  1407. return 0;
  1408. }
  1409. void core_dev_free_initiator_node_lun_acl(
  1410. struct se_portal_group *tpg,
  1411. struct se_lun_acl *lacl)
  1412. {
  1413. pr_debug("%s_TPG[%hu] - Freeing ACL for %s InitiatorNode: %s"
  1414. " Mapped LUN: %u\n", tpg->se_tpg_tfo->get_fabric_name(),
  1415. tpg->se_tpg_tfo->tpg_get_tag(tpg),
  1416. tpg->se_tpg_tfo->get_fabric_name(),
  1417. lacl->initiatorname, lacl->mapped_lun);
  1418. kfree(lacl);
  1419. }
  1420. int core_dev_setup_virtual_lun0(void)
  1421. {
  1422. struct se_hba *hba;
  1423. struct se_device *dev;
  1424. struct se_subsystem_dev *se_dev = NULL;
  1425. struct se_subsystem_api *t;
  1426. char buf[16];
  1427. int ret;
  1428. hba = core_alloc_hba("rd_mcp", 0, HBA_FLAGS_INTERNAL_USE);
  1429. if (IS_ERR(hba))
  1430. return PTR_ERR(hba);
  1431. lun0_hba = hba;
  1432. t = hba->transport;
  1433. se_dev = kzalloc(sizeof(struct se_subsystem_dev), GFP_KERNEL);
  1434. if (!se_dev) {
  1435. pr_err("Unable to allocate memory for"
  1436. " struct se_subsystem_dev\n");
  1437. ret = -ENOMEM;
  1438. goto out;
  1439. }
  1440. INIT_LIST_HEAD(&se_dev->t10_wwn.t10_vpd_list);
  1441. spin_lock_init(&se_dev->t10_wwn.t10_vpd_lock);
  1442. INIT_LIST_HEAD(&se_dev->t10_pr.registration_list);
  1443. INIT_LIST_HEAD(&se_dev->t10_pr.aptpl_reg_list);
  1444. spin_lock_init(&se_dev->t10_pr.registration_lock);
  1445. spin_lock_init(&se_dev->t10_pr.aptpl_reg_lock);
  1446. INIT_LIST_HEAD(&se_dev->t10_alua.tg_pt_gps_list);
  1447. spin_lock_init(&se_dev->t10_alua.tg_pt_gps_lock);
  1448. spin_lock_init(&se_dev->se_dev_lock);
  1449. se_dev->t10_pr.pr_aptpl_buf_len = PR_APTPL_BUF_LEN;
  1450. se_dev->t10_wwn.t10_sub_dev = se_dev;
  1451. se_dev->t10_alua.t10_sub_dev = se_dev;
  1452. se_dev->se_dev_attrib.da_sub_dev = se_dev;
  1453. se_dev->se_dev_hba = hba;
  1454. se_dev->se_dev_su_ptr = t->allocate_virtdevice(hba, "virt_lun0");
  1455. if (!se_dev->se_dev_su_ptr) {
  1456. pr_err("Unable to locate subsystem dependent pointer"
  1457. " from allocate_virtdevice()\n");
  1458. ret = -ENOMEM;
  1459. goto out;
  1460. }
  1461. lun0_su_dev = se_dev;
  1462. memset(buf, 0, 16);
  1463. sprintf(buf, "rd_pages=8");
  1464. t->set_configfs_dev_params(hba, se_dev, buf, sizeof(buf));
  1465. dev = t->create_virtdevice(hba, se_dev, se_dev->se_dev_su_ptr);
  1466. if (IS_ERR(dev)) {
  1467. ret = PTR_ERR(dev);
  1468. goto out;
  1469. }
  1470. se_dev->se_dev_ptr = dev;
  1471. g_lun0_dev = dev;
  1472. return 0;
  1473. out:
  1474. lun0_su_dev = NULL;
  1475. kfree(se_dev);
  1476. if (lun0_hba) {
  1477. core_delete_hba(lun0_hba);
  1478. lun0_hba = NULL;
  1479. }
  1480. return ret;
  1481. }
  1482. void core_dev_release_virtual_lun0(void)
  1483. {
  1484. struct se_hba *hba = lun0_hba;
  1485. struct se_subsystem_dev *su_dev = lun0_su_dev;
  1486. if (!hba)
  1487. return;
  1488. if (g_lun0_dev)
  1489. se_free_virtual_device(g_lun0_dev, hba);
  1490. kfree(su_dev);
  1491. core_delete_hba(hba);
  1492. }