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c66ac9db NB |
1 | /******************************************************************************* |
2 | * Filename: target_core_device.c (based on iscsi_target_device.c) | |
3 | * | |
4 | * This file contains the iSCSI Virtual Device and Disk Transport | |
5 | * agnostic related functions. | |
6 | * | |
7 | * Copyright (c) 2003, 2004, 2005 PyX Technologies, Inc. | |
8 | * Copyright (c) 2005-2006 SBE, Inc. All Rights Reserved. | |
9 | * Copyright (c) 2007-2010 Rising Tide Systems | |
10 | * Copyright (c) 2008-2010 Linux-iSCSI.org | |
11 | * | |
12 | * Nicholas A. Bellinger <nab@kernel.org> | |
13 | * | |
14 | * This program is free software; you can redistribute it and/or modify | |
15 | * it under the terms of the GNU General Public License as published by | |
16 | * the Free Software Foundation; either version 2 of the License, or | |
17 | * (at your option) any later version. | |
18 | * | |
19 | * This program is distributed in the hope that it will be useful, | |
20 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
21 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
22 | * GNU General Public License for more details. | |
23 | * | |
24 | * You should have received a copy of the GNU General Public License | |
25 | * along with this program; if not, write to the Free Software | |
26 | * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. | |
27 | * | |
28 | ******************************************************************************/ | |
29 | ||
30 | #include <linux/net.h> | |
31 | #include <linux/string.h> | |
32 | #include <linux/delay.h> | |
33 | #include <linux/timer.h> | |
34 | #include <linux/slab.h> | |
35 | #include <linux/spinlock.h> | |
36 | #include <linux/smp_lock.h> | |
37 | #include <linux/kthread.h> | |
38 | #include <linux/in.h> | |
39 | #include <net/sock.h> | |
40 | #include <net/tcp.h> | |
41 | #include <scsi/scsi.h> | |
42 | ||
43 | #include <target/target_core_base.h> | |
44 | #include <target/target_core_device.h> | |
45 | #include <target/target_core_tpg.h> | |
46 | #include <target/target_core_transport.h> | |
47 | #include <target/target_core_fabric_ops.h> | |
48 | ||
49 | #include "target_core_alua.h" | |
50 | #include "target_core_hba.h" | |
51 | #include "target_core_pr.h" | |
52 | #include "target_core_ua.h" | |
53 | ||
54 | static void se_dev_start(struct se_device *dev); | |
55 | static void se_dev_stop(struct se_device *dev); | |
56 | ||
57 | int transport_get_lun_for_cmd( | |
58 | struct se_cmd *se_cmd, | |
59 | unsigned char *cdb, | |
60 | u32 unpacked_lun) | |
61 | { | |
62 | struct se_dev_entry *deve; | |
63 | struct se_lun *se_lun = NULL; | |
64 | struct se_session *se_sess = SE_SESS(se_cmd); | |
65 | unsigned long flags; | |
66 | int read_only = 0; | |
67 | ||
68 | spin_lock_irq(&SE_NODE_ACL(se_sess)->device_list_lock); | |
69 | deve = se_cmd->se_deve = | |
70 | &SE_NODE_ACL(se_sess)->device_list[unpacked_lun]; | |
71 | if (deve->lun_flags & TRANSPORT_LUNFLAGS_INITIATOR_ACCESS) { | |
72 | if (se_cmd) { | |
73 | deve->total_cmds++; | |
74 | deve->total_bytes += se_cmd->data_length; | |
75 | ||
76 | if (se_cmd->data_direction == DMA_TO_DEVICE) { | |
77 | if (deve->lun_flags & | |
78 | TRANSPORT_LUNFLAGS_READ_ONLY) { | |
79 | read_only = 1; | |
80 | goto out; | |
81 | } | |
82 | deve->write_bytes += se_cmd->data_length; | |
83 | } else if (se_cmd->data_direction == | |
84 | DMA_FROM_DEVICE) { | |
85 | deve->read_bytes += se_cmd->data_length; | |
86 | } | |
87 | } | |
88 | deve->deve_cmds++; | |
89 | ||
90 | se_lun = se_cmd->se_lun = deve->se_lun; | |
91 | se_cmd->pr_res_key = deve->pr_res_key; | |
92 | se_cmd->orig_fe_lun = unpacked_lun; | |
93 | se_cmd->se_orig_obj_ptr = SE_LUN(se_cmd)->lun_se_dev; | |
94 | se_cmd->se_cmd_flags |= SCF_SE_LUN_CMD; | |
95 | } | |
96 | out: | |
97 | spin_unlock_irq(&SE_NODE_ACL(se_sess)->device_list_lock); | |
98 | ||
99 | if (!se_lun) { | |
100 | if (read_only) { | |
101 | se_cmd->scsi_sense_reason = TCM_WRITE_PROTECTED; | |
102 | se_cmd->se_cmd_flags |= SCF_SCSI_CDB_EXCEPTION; | |
103 | printk("TARGET_CORE[%s]: Detected WRITE_PROTECTED LUN" | |
104 | " Access for 0x%08x\n", | |
105 | CMD_TFO(se_cmd)->get_fabric_name(), | |
106 | unpacked_lun); | |
107 | return -1; | |
108 | } else { | |
109 | /* | |
110 | * Use the se_portal_group->tpg_virt_lun0 to allow for | |
111 | * REPORT_LUNS, et al to be returned when no active | |
112 | * MappedLUN=0 exists for this Initiator Port. | |
113 | */ | |
114 | if (unpacked_lun != 0) { | |
115 | se_cmd->scsi_sense_reason = TCM_NON_EXISTENT_LUN; | |
116 | se_cmd->se_cmd_flags |= SCF_SCSI_CDB_EXCEPTION; | |
117 | printk("TARGET_CORE[%s]: Detected NON_EXISTENT_LUN" | |
118 | " Access for 0x%08x\n", | |
119 | CMD_TFO(se_cmd)->get_fabric_name(), | |
120 | unpacked_lun); | |
121 | return -1; | |
122 | } | |
123 | /* | |
124 | * Force WRITE PROTECT for virtual LUN 0 | |
125 | */ | |
126 | if ((se_cmd->data_direction != DMA_FROM_DEVICE) && | |
127 | (se_cmd->data_direction != DMA_NONE)) { | |
128 | se_cmd->scsi_sense_reason = TCM_WRITE_PROTECTED; | |
129 | se_cmd->se_cmd_flags |= SCF_SCSI_CDB_EXCEPTION; | |
130 | return -1; | |
131 | } | |
132 | #if 0 | |
133 | printk("TARGET_CORE[%s]: Using virtual LUN0! :-)\n", | |
134 | CMD_TFO(se_cmd)->get_fabric_name()); | |
135 | #endif | |
136 | se_lun = se_cmd->se_lun = &se_sess->se_tpg->tpg_virt_lun0; | |
137 | se_cmd->orig_fe_lun = 0; | |
138 | se_cmd->se_orig_obj_ptr = SE_LUN(se_cmd)->lun_se_dev; | |
139 | se_cmd->se_cmd_flags |= SCF_SE_LUN_CMD; | |
140 | } | |
141 | } | |
142 | /* | |
143 | * Determine if the struct se_lun is online. | |
144 | */ | |
145 | /* #warning FIXME: Check for LUN_RESET + UNIT Attention */ | |
146 | if (se_dev_check_online(se_lun->lun_se_dev) != 0) { | |
147 | se_cmd->scsi_sense_reason = TCM_NON_EXISTENT_LUN; | |
148 | se_cmd->se_cmd_flags |= SCF_SCSI_CDB_EXCEPTION; | |
149 | return -1; | |
150 | } | |
151 | ||
152 | { | |
153 | struct se_device *dev = se_lun->lun_se_dev; | |
154 | spin_lock(&dev->stats_lock); | |
155 | dev->num_cmds++; | |
156 | if (se_cmd->data_direction == DMA_TO_DEVICE) | |
157 | dev->write_bytes += se_cmd->data_length; | |
158 | else if (se_cmd->data_direction == DMA_FROM_DEVICE) | |
159 | dev->read_bytes += se_cmd->data_length; | |
160 | spin_unlock(&dev->stats_lock); | |
161 | } | |
162 | ||
163 | /* | |
164 | * Add the iscsi_cmd_t to the struct se_lun's cmd list. This list is used | |
165 | * for tracking state of struct se_cmds during LUN shutdown events. | |
166 | */ | |
167 | spin_lock_irqsave(&se_lun->lun_cmd_lock, flags); | |
168 | list_add_tail(&se_cmd->se_lun_list, &se_lun->lun_cmd_list); | |
169 | atomic_set(&T_TASK(se_cmd)->transport_lun_active, 1); | |
170 | #if 0 | |
171 | printk(KERN_INFO "Adding ITT: 0x%08x to LUN LIST[%d]\n", | |
172 | CMD_TFO(se_cmd)->get_task_tag(se_cmd), se_lun->unpacked_lun); | |
173 | #endif | |
174 | spin_unlock_irqrestore(&se_lun->lun_cmd_lock, flags); | |
175 | ||
176 | return 0; | |
177 | } | |
178 | EXPORT_SYMBOL(transport_get_lun_for_cmd); | |
179 | ||
180 | int transport_get_lun_for_tmr( | |
181 | struct se_cmd *se_cmd, | |
182 | u32 unpacked_lun) | |
183 | { | |
184 | struct se_device *dev = NULL; | |
185 | struct se_dev_entry *deve; | |
186 | struct se_lun *se_lun = NULL; | |
187 | struct se_session *se_sess = SE_SESS(se_cmd); | |
188 | struct se_tmr_req *se_tmr = se_cmd->se_tmr_req; | |
189 | ||
190 | spin_lock_irq(&SE_NODE_ACL(se_sess)->device_list_lock); | |
191 | deve = se_cmd->se_deve = | |
192 | &SE_NODE_ACL(se_sess)->device_list[unpacked_lun]; | |
193 | if (deve->lun_flags & TRANSPORT_LUNFLAGS_INITIATOR_ACCESS) { | |
194 | se_lun = se_cmd->se_lun = se_tmr->tmr_lun = deve->se_lun; | |
195 | dev = se_tmr->tmr_dev = se_lun->lun_se_dev; | |
196 | se_cmd->pr_res_key = deve->pr_res_key; | |
197 | se_cmd->orig_fe_lun = unpacked_lun; | |
198 | se_cmd->se_orig_obj_ptr = SE_LUN(se_cmd)->lun_se_dev; | |
199 | /* se_cmd->se_cmd_flags |= SCF_SE_LUN_CMD; */ | |
200 | } | |
201 | spin_unlock_irq(&SE_NODE_ACL(se_sess)->device_list_lock); | |
202 | ||
203 | if (!se_lun) { | |
204 | printk(KERN_INFO "TARGET_CORE[%s]: Detected NON_EXISTENT_LUN" | |
205 | " Access for 0x%08x\n", | |
206 | CMD_TFO(se_cmd)->get_fabric_name(), | |
207 | unpacked_lun); | |
208 | se_cmd->se_cmd_flags |= SCF_SCSI_CDB_EXCEPTION; | |
209 | return -1; | |
210 | } | |
211 | /* | |
212 | * Determine if the struct se_lun is online. | |
213 | */ | |
214 | /* #warning FIXME: Check for LUN_RESET + UNIT Attention */ | |
215 | if (se_dev_check_online(se_lun->lun_se_dev) != 0) { | |
216 | se_cmd->se_cmd_flags |= SCF_SCSI_CDB_EXCEPTION; | |
217 | return -1; | |
218 | } | |
219 | ||
220 | spin_lock(&dev->se_tmr_lock); | |
221 | list_add_tail(&se_tmr->tmr_list, &dev->dev_tmr_list); | |
222 | spin_unlock(&dev->se_tmr_lock); | |
223 | ||
224 | return 0; | |
225 | } | |
226 | EXPORT_SYMBOL(transport_get_lun_for_tmr); | |
227 | ||
228 | /* | |
229 | * This function is called from core_scsi3_emulate_pro_register_and_move() | |
230 | * and core_scsi3_decode_spec_i_port(), and will increment &deve->pr_ref_count | |
231 | * when a matching rtpi is found. | |
232 | */ | |
233 | struct se_dev_entry *core_get_se_deve_from_rtpi( | |
234 | struct se_node_acl *nacl, | |
235 | u16 rtpi) | |
236 | { | |
237 | struct se_dev_entry *deve; | |
238 | struct se_lun *lun; | |
239 | struct se_port *port; | |
240 | struct se_portal_group *tpg = nacl->se_tpg; | |
241 | u32 i; | |
242 | ||
243 | spin_lock_irq(&nacl->device_list_lock); | |
244 | for (i = 0; i < TRANSPORT_MAX_LUNS_PER_TPG; i++) { | |
245 | deve = &nacl->device_list[i]; | |
246 | ||
247 | if (!(deve->lun_flags & TRANSPORT_LUNFLAGS_INITIATOR_ACCESS)) | |
248 | continue; | |
249 | ||
250 | lun = deve->se_lun; | |
251 | if (!(lun)) { | |
252 | printk(KERN_ERR "%s device entries device pointer is" | |
253 | " NULL, but Initiator has access.\n", | |
254 | TPG_TFO(tpg)->get_fabric_name()); | |
255 | continue; | |
256 | } | |
257 | port = lun->lun_sep; | |
258 | if (!(port)) { | |
259 | printk(KERN_ERR "%s device entries device pointer is" | |
260 | " NULL, but Initiator has access.\n", | |
261 | TPG_TFO(tpg)->get_fabric_name()); | |
262 | continue; | |
263 | } | |
264 | if (port->sep_rtpi != rtpi) | |
265 | continue; | |
266 | ||
267 | atomic_inc(&deve->pr_ref_count); | |
268 | smp_mb__after_atomic_inc(); | |
269 | spin_unlock_irq(&nacl->device_list_lock); | |
270 | ||
271 | return deve; | |
272 | } | |
273 | spin_unlock_irq(&nacl->device_list_lock); | |
274 | ||
275 | return NULL; | |
276 | } | |
277 | ||
278 | int core_free_device_list_for_node( | |
279 | struct se_node_acl *nacl, | |
280 | struct se_portal_group *tpg) | |
281 | { | |
282 | struct se_dev_entry *deve; | |
283 | struct se_lun *lun; | |
284 | u32 i; | |
285 | ||
286 | if (!nacl->device_list) | |
287 | return 0; | |
288 | ||
289 | spin_lock_irq(&nacl->device_list_lock); | |
290 | for (i = 0; i < TRANSPORT_MAX_LUNS_PER_TPG; i++) { | |
291 | deve = &nacl->device_list[i]; | |
292 | ||
293 | if (!(deve->lun_flags & TRANSPORT_LUNFLAGS_INITIATOR_ACCESS)) | |
294 | continue; | |
295 | ||
296 | if (!deve->se_lun) { | |
297 | printk(KERN_ERR "%s device entries device pointer is" | |
298 | " NULL, but Initiator has access.\n", | |
299 | TPG_TFO(tpg)->get_fabric_name()); | |
300 | continue; | |
301 | } | |
302 | lun = deve->se_lun; | |
303 | ||
304 | spin_unlock_irq(&nacl->device_list_lock); | |
305 | core_update_device_list_for_node(lun, NULL, deve->mapped_lun, | |
306 | TRANSPORT_LUNFLAGS_NO_ACCESS, nacl, tpg, 0); | |
307 | spin_lock_irq(&nacl->device_list_lock); | |
308 | } | |
309 | spin_unlock_irq(&nacl->device_list_lock); | |
310 | ||
311 | kfree(nacl->device_list); | |
312 | nacl->device_list = NULL; | |
313 | ||
314 | return 0; | |
315 | } | |
316 | ||
317 | void core_dec_lacl_count(struct se_node_acl *se_nacl, struct se_cmd *se_cmd) | |
318 | { | |
319 | struct se_dev_entry *deve; | |
320 | ||
321 | spin_lock_irq(&se_nacl->device_list_lock); | |
322 | deve = &se_nacl->device_list[se_cmd->orig_fe_lun]; | |
323 | deve->deve_cmds--; | |
324 | spin_unlock_irq(&se_nacl->device_list_lock); | |
325 | ||
326 | return; | |
327 | } | |
328 | ||
329 | void core_update_device_list_access( | |
330 | u32 mapped_lun, | |
331 | u32 lun_access, | |
332 | struct se_node_acl *nacl) | |
333 | { | |
334 | struct se_dev_entry *deve; | |
335 | ||
336 | spin_lock_irq(&nacl->device_list_lock); | |
337 | deve = &nacl->device_list[mapped_lun]; | |
338 | if (lun_access & TRANSPORT_LUNFLAGS_READ_WRITE) { | |
339 | deve->lun_flags &= ~TRANSPORT_LUNFLAGS_READ_ONLY; | |
340 | deve->lun_flags |= TRANSPORT_LUNFLAGS_READ_WRITE; | |
341 | } else { | |
342 | deve->lun_flags &= ~TRANSPORT_LUNFLAGS_READ_WRITE; | |
343 | deve->lun_flags |= TRANSPORT_LUNFLAGS_READ_ONLY; | |
344 | } | |
345 | spin_unlock_irq(&nacl->device_list_lock); | |
346 | ||
347 | return; | |
348 | } | |
349 | ||
350 | /* core_update_device_list_for_node(): | |
351 | * | |
352 | * | |
353 | */ | |
354 | int core_update_device_list_for_node( | |
355 | struct se_lun *lun, | |
356 | struct se_lun_acl *lun_acl, | |
357 | u32 mapped_lun, | |
358 | u32 lun_access, | |
359 | struct se_node_acl *nacl, | |
360 | struct se_portal_group *tpg, | |
361 | int enable) | |
362 | { | |
363 | struct se_port *port = lun->lun_sep; | |
364 | struct se_dev_entry *deve = &nacl->device_list[mapped_lun]; | |
365 | int trans = 0; | |
366 | /* | |
367 | * If the MappedLUN entry is being disabled, the entry in | |
368 | * port->sep_alua_list must be removed now before clearing the | |
369 | * struct se_dev_entry pointers below as logic in | |
370 | * core_alua_do_transition_tg_pt() depends on these being present. | |
371 | */ | |
372 | if (!(enable)) { | |
373 | /* | |
374 | * deve->se_lun_acl will be NULL for demo-mode created LUNs | |
375 | * that have not been explictly concerted to MappedLUNs -> | |
29fe609d NB |
376 | * struct se_lun_acl, but we remove deve->alua_port_list from |
377 | * port->sep_alua_list. This also means that active UAs and | |
378 | * NodeACL context specific PR metadata for demo-mode | |
379 | * MappedLUN *deve will be released below.. | |
c66ac9db | 380 | */ |
c66ac9db NB |
381 | spin_lock_bh(&port->sep_alua_lock); |
382 | list_del(&deve->alua_port_list); | |
383 | spin_unlock_bh(&port->sep_alua_lock); | |
384 | } | |
385 | ||
386 | spin_lock_irq(&nacl->device_list_lock); | |
387 | if (enable) { | |
388 | /* | |
389 | * Check if the call is handling demo mode -> explict LUN ACL | |
390 | * transition. This transition must be for the same struct se_lun | |
391 | * + mapped_lun that was setup in demo mode.. | |
392 | */ | |
393 | if (deve->lun_flags & TRANSPORT_LUNFLAGS_INITIATOR_ACCESS) { | |
394 | if (deve->se_lun_acl != NULL) { | |
395 | printk(KERN_ERR "struct se_dev_entry->se_lun_acl" | |
396 | " already set for demo mode -> explict" | |
397 | " LUN ACL transition\n"); | |
85dc98d9 | 398 | spin_unlock_irq(&nacl->device_list_lock); |
c66ac9db NB |
399 | return -1; |
400 | } | |
401 | if (deve->se_lun != lun) { | |
402 | printk(KERN_ERR "struct se_dev_entry->se_lun does" | |
403 | " match passed struct se_lun for demo mode" | |
404 | " -> explict LUN ACL transition\n"); | |
85dc98d9 | 405 | spin_unlock_irq(&nacl->device_list_lock); |
c66ac9db NB |
406 | return -1; |
407 | } | |
408 | deve->se_lun_acl = lun_acl; | |
409 | trans = 1; | |
410 | } else { | |
411 | deve->se_lun = lun; | |
412 | deve->se_lun_acl = lun_acl; | |
413 | deve->mapped_lun = mapped_lun; | |
414 | deve->lun_flags |= TRANSPORT_LUNFLAGS_INITIATOR_ACCESS; | |
415 | } | |
416 | ||
417 | if (lun_access & TRANSPORT_LUNFLAGS_READ_WRITE) { | |
418 | deve->lun_flags &= ~TRANSPORT_LUNFLAGS_READ_ONLY; | |
419 | deve->lun_flags |= TRANSPORT_LUNFLAGS_READ_WRITE; | |
420 | } else { | |
421 | deve->lun_flags &= ~TRANSPORT_LUNFLAGS_READ_WRITE; | |
422 | deve->lun_flags |= TRANSPORT_LUNFLAGS_READ_ONLY; | |
423 | } | |
424 | ||
425 | if (trans) { | |
426 | spin_unlock_irq(&nacl->device_list_lock); | |
427 | return 0; | |
428 | } | |
429 | deve->creation_time = get_jiffies_64(); | |
430 | deve->attach_count++; | |
431 | spin_unlock_irq(&nacl->device_list_lock); | |
432 | ||
433 | spin_lock_bh(&port->sep_alua_lock); | |
434 | list_add_tail(&deve->alua_port_list, &port->sep_alua_list); | |
435 | spin_unlock_bh(&port->sep_alua_lock); | |
436 | ||
437 | return 0; | |
438 | } | |
439 | /* | |
440 | * Wait for any in process SPEC_I_PT=1 or REGISTER_AND_MOVE | |
441 | * PR operation to complete. | |
442 | */ | |
443 | spin_unlock_irq(&nacl->device_list_lock); | |
444 | while (atomic_read(&deve->pr_ref_count) != 0) | |
445 | cpu_relax(); | |
446 | spin_lock_irq(&nacl->device_list_lock); | |
447 | /* | |
448 | * Disable struct se_dev_entry LUN ACL mapping | |
449 | */ | |
450 | core_scsi3_ua_release_all(deve); | |
451 | deve->se_lun = NULL; | |
452 | deve->se_lun_acl = NULL; | |
453 | deve->lun_flags = 0; | |
454 | deve->creation_time = 0; | |
455 | deve->attach_count--; | |
456 | spin_unlock_irq(&nacl->device_list_lock); | |
457 | ||
458 | core_scsi3_free_pr_reg_from_nacl(lun->lun_se_dev, nacl); | |
459 | return 0; | |
460 | } | |
461 | ||
462 | /* core_clear_lun_from_tpg(): | |
463 | * | |
464 | * | |
465 | */ | |
466 | void core_clear_lun_from_tpg(struct se_lun *lun, struct se_portal_group *tpg) | |
467 | { | |
468 | struct se_node_acl *nacl; | |
469 | struct se_dev_entry *deve; | |
470 | u32 i; | |
471 | ||
472 | spin_lock_bh(&tpg->acl_node_lock); | |
473 | list_for_each_entry(nacl, &tpg->acl_node_list, acl_list) { | |
474 | spin_unlock_bh(&tpg->acl_node_lock); | |
475 | ||
476 | spin_lock_irq(&nacl->device_list_lock); | |
477 | for (i = 0; i < TRANSPORT_MAX_LUNS_PER_TPG; i++) { | |
478 | deve = &nacl->device_list[i]; | |
479 | if (lun != deve->se_lun) | |
480 | continue; | |
481 | spin_unlock_irq(&nacl->device_list_lock); | |
482 | ||
483 | core_update_device_list_for_node(lun, NULL, | |
484 | deve->mapped_lun, TRANSPORT_LUNFLAGS_NO_ACCESS, | |
485 | nacl, tpg, 0); | |
486 | ||
487 | spin_lock_irq(&nacl->device_list_lock); | |
488 | } | |
489 | spin_unlock_irq(&nacl->device_list_lock); | |
490 | ||
491 | spin_lock_bh(&tpg->acl_node_lock); | |
492 | } | |
493 | spin_unlock_bh(&tpg->acl_node_lock); | |
494 | ||
495 | return; | |
496 | } | |
497 | ||
498 | static struct se_port *core_alloc_port(struct se_device *dev) | |
499 | { | |
500 | struct se_port *port, *port_tmp; | |
501 | ||
502 | port = kzalloc(sizeof(struct se_port), GFP_KERNEL); | |
503 | if (!(port)) { | |
504 | printk(KERN_ERR "Unable to allocate struct se_port\n"); | |
505 | return NULL; | |
506 | } | |
507 | INIT_LIST_HEAD(&port->sep_alua_list); | |
508 | INIT_LIST_HEAD(&port->sep_list); | |
509 | atomic_set(&port->sep_tg_pt_secondary_offline, 0); | |
510 | spin_lock_init(&port->sep_alua_lock); | |
511 | mutex_init(&port->sep_tg_pt_md_mutex); | |
512 | ||
513 | spin_lock(&dev->se_port_lock); | |
514 | if (dev->dev_port_count == 0x0000ffff) { | |
515 | printk(KERN_WARNING "Reached dev->dev_port_count ==" | |
516 | " 0x0000ffff\n"); | |
517 | spin_unlock(&dev->se_port_lock); | |
518 | return NULL; | |
519 | } | |
520 | again: | |
521 | /* | |
522 | * Allocate the next RELATIVE TARGET PORT IDENTIFER for this struct se_device | |
523 | * Here is the table from spc4r17 section 7.7.3.8. | |
524 | * | |
525 | * Table 473 -- RELATIVE TARGET PORT IDENTIFIER field | |
526 | * | |
527 | * Code Description | |
528 | * 0h Reserved | |
529 | * 1h Relative port 1, historically known as port A | |
530 | * 2h Relative port 2, historically known as port B | |
531 | * 3h to FFFFh Relative port 3 through 65 535 | |
532 | */ | |
533 | port->sep_rtpi = dev->dev_rpti_counter++; | |
534 | if (!(port->sep_rtpi)) | |
535 | goto again; | |
536 | ||
537 | list_for_each_entry(port_tmp, &dev->dev_sep_list, sep_list) { | |
538 | /* | |
539 | * Make sure RELATIVE TARGET PORT IDENTIFER is unique | |
540 | * for 16-bit wrap.. | |
541 | */ | |
542 | if (port->sep_rtpi == port_tmp->sep_rtpi) | |
543 | goto again; | |
544 | } | |
545 | spin_unlock(&dev->se_port_lock); | |
546 | ||
547 | return port; | |
548 | } | |
549 | ||
550 | static void core_export_port( | |
551 | struct se_device *dev, | |
552 | struct se_portal_group *tpg, | |
553 | struct se_port *port, | |
554 | struct se_lun *lun) | |
555 | { | |
556 | struct se_subsystem_dev *su_dev = SU_DEV(dev); | |
557 | struct t10_alua_tg_pt_gp_member *tg_pt_gp_mem = NULL; | |
558 | ||
559 | spin_lock(&dev->se_port_lock); | |
560 | spin_lock(&lun->lun_sep_lock); | |
561 | port->sep_tpg = tpg; | |
562 | port->sep_lun = lun; | |
563 | lun->lun_sep = port; | |
564 | spin_unlock(&lun->lun_sep_lock); | |
565 | ||
566 | list_add_tail(&port->sep_list, &dev->dev_sep_list); | |
567 | spin_unlock(&dev->se_port_lock); | |
568 | ||
569 | if (T10_ALUA(su_dev)->alua_type == SPC3_ALUA_EMULATED) { | |
570 | tg_pt_gp_mem = core_alua_allocate_tg_pt_gp_mem(port); | |
571 | if (IS_ERR(tg_pt_gp_mem) || !tg_pt_gp_mem) { | |
572 | printk(KERN_ERR "Unable to allocate t10_alua_tg_pt" | |
573 | "_gp_member_t\n"); | |
574 | return; | |
575 | } | |
576 | spin_lock(&tg_pt_gp_mem->tg_pt_gp_mem_lock); | |
577 | __core_alua_attach_tg_pt_gp_mem(tg_pt_gp_mem, | |
578 | T10_ALUA(su_dev)->default_tg_pt_gp); | |
579 | spin_unlock(&tg_pt_gp_mem->tg_pt_gp_mem_lock); | |
580 | printk(KERN_INFO "%s/%s: Adding to default ALUA Target Port" | |
581 | " Group: alua/default_tg_pt_gp\n", | |
582 | TRANSPORT(dev)->name, TPG_TFO(tpg)->get_fabric_name()); | |
583 | } | |
584 | ||
585 | dev->dev_port_count++; | |
586 | port->sep_index = port->sep_rtpi; /* RELATIVE TARGET PORT IDENTIFER */ | |
587 | } | |
588 | ||
589 | /* | |
590 | * Called with struct se_device->se_port_lock spinlock held. | |
591 | */ | |
592 | static void core_release_port(struct se_device *dev, struct se_port *port) | |
593 | { | |
594 | /* | |
595 | * Wait for any port reference for PR ALL_TG_PT=1 operation | |
596 | * to complete in __core_scsi3_alloc_registration() | |
597 | */ | |
598 | spin_unlock(&dev->se_port_lock); | |
599 | if (atomic_read(&port->sep_tg_pt_ref_cnt)) | |
600 | cpu_relax(); | |
601 | spin_lock(&dev->se_port_lock); | |
602 | ||
603 | core_alua_free_tg_pt_gp_mem(port); | |
604 | ||
605 | list_del(&port->sep_list); | |
606 | dev->dev_port_count--; | |
607 | kfree(port); | |
608 | ||
609 | return; | |
610 | } | |
611 | ||
612 | int core_dev_export( | |
613 | struct se_device *dev, | |
614 | struct se_portal_group *tpg, | |
615 | struct se_lun *lun) | |
616 | { | |
617 | struct se_port *port; | |
618 | ||
619 | port = core_alloc_port(dev); | |
620 | if (!(port)) | |
621 | return -1; | |
622 | ||
623 | lun->lun_se_dev = dev; | |
624 | se_dev_start(dev); | |
625 | ||
626 | atomic_inc(&dev->dev_export_obj.obj_access_count); | |
627 | core_export_port(dev, tpg, port, lun); | |
628 | return 0; | |
629 | } | |
630 | ||
631 | void core_dev_unexport( | |
632 | struct se_device *dev, | |
633 | struct se_portal_group *tpg, | |
634 | struct se_lun *lun) | |
635 | { | |
636 | struct se_port *port = lun->lun_sep; | |
637 | ||
638 | spin_lock(&lun->lun_sep_lock); | |
639 | if (lun->lun_se_dev == NULL) { | |
640 | spin_unlock(&lun->lun_sep_lock); | |
641 | return; | |
642 | } | |
643 | spin_unlock(&lun->lun_sep_lock); | |
644 | ||
645 | spin_lock(&dev->se_port_lock); | |
646 | atomic_dec(&dev->dev_export_obj.obj_access_count); | |
647 | core_release_port(dev, port); | |
648 | spin_unlock(&dev->se_port_lock); | |
649 | ||
650 | se_dev_stop(dev); | |
651 | lun->lun_se_dev = NULL; | |
652 | } | |
653 | ||
654 | int transport_core_report_lun_response(struct se_cmd *se_cmd) | |
655 | { | |
656 | struct se_dev_entry *deve; | |
657 | struct se_lun *se_lun; | |
658 | struct se_session *se_sess = SE_SESS(se_cmd); | |
659 | struct se_task *se_task; | |
660 | unsigned char *buf = (unsigned char *)T_TASK(se_cmd)->t_task_buf; | |
661 | u32 cdb_offset = 0, lun_count = 0, offset = 8; | |
662 | u64 i, lun; | |
663 | ||
664 | list_for_each_entry(se_task, &T_TASK(se_cmd)->t_task_list, t_list) | |
665 | break; | |
666 | ||
667 | if (!(se_task)) { | |
668 | printk(KERN_ERR "Unable to locate struct se_task for struct se_cmd\n"); | |
669 | return PYX_TRANSPORT_LU_COMM_FAILURE; | |
670 | } | |
671 | ||
672 | /* | |
673 | * If no struct se_session pointer is present, this struct se_cmd is | |
674 | * coming via a target_core_mod PASSTHROUGH op, and not through | |
675 | * a $FABRIC_MOD. In that case, report LUN=0 only. | |
676 | */ | |
677 | if (!(se_sess)) { | |
678 | lun = 0; | |
679 | buf[offset++] = ((lun >> 56) & 0xff); | |
680 | buf[offset++] = ((lun >> 48) & 0xff); | |
681 | buf[offset++] = ((lun >> 40) & 0xff); | |
682 | buf[offset++] = ((lun >> 32) & 0xff); | |
683 | buf[offset++] = ((lun >> 24) & 0xff); | |
684 | buf[offset++] = ((lun >> 16) & 0xff); | |
685 | buf[offset++] = ((lun >> 8) & 0xff); | |
686 | buf[offset++] = (lun & 0xff); | |
687 | lun_count = 1; | |
688 | goto done; | |
689 | } | |
690 | ||
691 | spin_lock_irq(&SE_NODE_ACL(se_sess)->device_list_lock); | |
692 | for (i = 0; i < TRANSPORT_MAX_LUNS_PER_TPG; i++) { | |
693 | deve = &SE_NODE_ACL(se_sess)->device_list[i]; | |
694 | if (!(deve->lun_flags & TRANSPORT_LUNFLAGS_INITIATOR_ACCESS)) | |
695 | continue; | |
696 | se_lun = deve->se_lun; | |
697 | /* | |
698 | * We determine the correct LUN LIST LENGTH even once we | |
699 | * have reached the initial allocation length. | |
700 | * See SPC2-R20 7.19. | |
701 | */ | |
702 | lun_count++; | |
703 | if ((cdb_offset + 8) >= se_cmd->data_length) | |
704 | continue; | |
705 | ||
706 | lun = cpu_to_be64(CMD_TFO(se_cmd)->pack_lun(deve->mapped_lun)); | |
707 | buf[offset++] = ((lun >> 56) & 0xff); | |
708 | buf[offset++] = ((lun >> 48) & 0xff); | |
709 | buf[offset++] = ((lun >> 40) & 0xff); | |
710 | buf[offset++] = ((lun >> 32) & 0xff); | |
711 | buf[offset++] = ((lun >> 24) & 0xff); | |
712 | buf[offset++] = ((lun >> 16) & 0xff); | |
713 | buf[offset++] = ((lun >> 8) & 0xff); | |
714 | buf[offset++] = (lun & 0xff); | |
715 | cdb_offset += 8; | |
716 | } | |
717 | spin_unlock_irq(&SE_NODE_ACL(se_sess)->device_list_lock); | |
718 | ||
719 | /* | |
720 | * See SPC3 r07, page 159. | |
721 | */ | |
722 | done: | |
723 | lun_count *= 8; | |
724 | buf[0] = ((lun_count >> 24) & 0xff); | |
725 | buf[1] = ((lun_count >> 16) & 0xff); | |
726 | buf[2] = ((lun_count >> 8) & 0xff); | |
727 | buf[3] = (lun_count & 0xff); | |
728 | ||
729 | return PYX_TRANSPORT_SENT_TO_TRANSPORT; | |
730 | } | |
731 | ||
732 | /* se_release_device_for_hba(): | |
733 | * | |
734 | * | |
735 | */ | |
736 | void se_release_device_for_hba(struct se_device *dev) | |
737 | { | |
738 | struct se_hba *hba = dev->se_hba; | |
739 | ||
740 | if ((dev->dev_status & TRANSPORT_DEVICE_ACTIVATED) || | |
741 | (dev->dev_status & TRANSPORT_DEVICE_DEACTIVATED) || | |
742 | (dev->dev_status & TRANSPORT_DEVICE_SHUTDOWN) || | |
743 | (dev->dev_status & TRANSPORT_DEVICE_OFFLINE_ACTIVATED) || | |
744 | (dev->dev_status & TRANSPORT_DEVICE_OFFLINE_DEACTIVATED)) | |
745 | se_dev_stop(dev); | |
746 | ||
747 | if (dev->dev_ptr) { | |
748 | kthread_stop(dev->process_thread); | |
749 | if (dev->transport->free_device) | |
750 | dev->transport->free_device(dev->dev_ptr); | |
751 | } | |
752 | ||
753 | spin_lock(&hba->device_lock); | |
754 | list_del(&dev->dev_list); | |
755 | hba->dev_count--; | |
756 | spin_unlock(&hba->device_lock); | |
757 | ||
758 | core_scsi3_free_all_registrations(dev); | |
759 | se_release_vpd_for_dev(dev); | |
760 | ||
761 | kfree(dev->dev_status_queue_obj); | |
762 | kfree(dev->dev_queue_obj); | |
763 | kfree(dev); | |
764 | ||
765 | return; | |
766 | } | |
767 | ||
768 | void se_release_vpd_for_dev(struct se_device *dev) | |
769 | { | |
770 | struct t10_vpd *vpd, *vpd_tmp; | |
771 | ||
772 | spin_lock(&DEV_T10_WWN(dev)->t10_vpd_lock); | |
773 | list_for_each_entry_safe(vpd, vpd_tmp, | |
774 | &DEV_T10_WWN(dev)->t10_vpd_list, vpd_list) { | |
775 | list_del(&vpd->vpd_list); | |
776 | kfree(vpd); | |
777 | } | |
778 | spin_unlock(&DEV_T10_WWN(dev)->t10_vpd_lock); | |
779 | ||
780 | return; | |
781 | } | |
782 | ||
783 | /* | |
784 | * Called with struct se_hba->device_lock held. | |
785 | */ | |
786 | void se_clear_dev_ports(struct se_device *dev) | |
787 | { | |
788 | struct se_hba *hba = dev->se_hba; | |
789 | struct se_lun *lun; | |
790 | struct se_portal_group *tpg; | |
791 | struct se_port *sep, *sep_tmp; | |
792 | ||
793 | spin_lock(&dev->se_port_lock); | |
794 | list_for_each_entry_safe(sep, sep_tmp, &dev->dev_sep_list, sep_list) { | |
795 | spin_unlock(&dev->se_port_lock); | |
796 | spin_unlock(&hba->device_lock); | |
797 | ||
798 | lun = sep->sep_lun; | |
799 | tpg = sep->sep_tpg; | |
800 | spin_lock(&lun->lun_sep_lock); | |
801 | if (lun->lun_se_dev == NULL) { | |
802 | spin_unlock(&lun->lun_sep_lock); | |
803 | continue; | |
804 | } | |
805 | spin_unlock(&lun->lun_sep_lock); | |
806 | ||
807 | core_dev_del_lun(tpg, lun->unpacked_lun); | |
808 | ||
809 | spin_lock(&hba->device_lock); | |
810 | spin_lock(&dev->se_port_lock); | |
811 | } | |
812 | spin_unlock(&dev->se_port_lock); | |
813 | ||
814 | return; | |
815 | } | |
816 | ||
817 | /* se_free_virtual_device(): | |
818 | * | |
819 | * Used for IBLOCK, RAMDISK, and FILEIO Transport Drivers. | |
820 | */ | |
821 | int se_free_virtual_device(struct se_device *dev, struct se_hba *hba) | |
822 | { | |
823 | spin_lock(&hba->device_lock); | |
824 | se_clear_dev_ports(dev); | |
825 | spin_unlock(&hba->device_lock); | |
826 | ||
827 | core_alua_free_lu_gp_mem(dev); | |
828 | se_release_device_for_hba(dev); | |
829 | ||
830 | return 0; | |
831 | } | |
832 | ||
833 | static void se_dev_start(struct se_device *dev) | |
834 | { | |
835 | struct se_hba *hba = dev->se_hba; | |
836 | ||
837 | spin_lock(&hba->device_lock); | |
838 | atomic_inc(&dev->dev_obj.obj_access_count); | |
839 | if (atomic_read(&dev->dev_obj.obj_access_count) == 1) { | |
840 | if (dev->dev_status & TRANSPORT_DEVICE_DEACTIVATED) { | |
841 | dev->dev_status &= ~TRANSPORT_DEVICE_DEACTIVATED; | |
842 | dev->dev_status |= TRANSPORT_DEVICE_ACTIVATED; | |
843 | } else if (dev->dev_status & | |
844 | TRANSPORT_DEVICE_OFFLINE_DEACTIVATED) { | |
845 | dev->dev_status &= | |
846 | ~TRANSPORT_DEVICE_OFFLINE_DEACTIVATED; | |
847 | dev->dev_status |= TRANSPORT_DEVICE_OFFLINE_ACTIVATED; | |
848 | } | |
849 | } | |
850 | spin_unlock(&hba->device_lock); | |
851 | } | |
852 | ||
853 | static void se_dev_stop(struct se_device *dev) | |
854 | { | |
855 | struct se_hba *hba = dev->se_hba; | |
856 | ||
857 | spin_lock(&hba->device_lock); | |
858 | atomic_dec(&dev->dev_obj.obj_access_count); | |
859 | if (atomic_read(&dev->dev_obj.obj_access_count) == 0) { | |
860 | if (dev->dev_status & TRANSPORT_DEVICE_ACTIVATED) { | |
861 | dev->dev_status &= ~TRANSPORT_DEVICE_ACTIVATED; | |
862 | dev->dev_status |= TRANSPORT_DEVICE_DEACTIVATED; | |
863 | } else if (dev->dev_status & | |
864 | TRANSPORT_DEVICE_OFFLINE_ACTIVATED) { | |
865 | dev->dev_status &= ~TRANSPORT_DEVICE_OFFLINE_ACTIVATED; | |
866 | dev->dev_status |= TRANSPORT_DEVICE_OFFLINE_DEACTIVATED; | |
867 | } | |
868 | } | |
869 | spin_unlock(&hba->device_lock); | |
c66ac9db NB |
870 | } |
871 | ||
872 | int se_dev_check_online(struct se_device *dev) | |
873 | { | |
874 | int ret; | |
875 | ||
876 | spin_lock_irq(&dev->dev_status_lock); | |
877 | ret = ((dev->dev_status & TRANSPORT_DEVICE_ACTIVATED) || | |
878 | (dev->dev_status & TRANSPORT_DEVICE_DEACTIVATED)) ? 0 : 1; | |
879 | spin_unlock_irq(&dev->dev_status_lock); | |
880 | ||
881 | return ret; | |
882 | } | |
883 | ||
884 | int se_dev_check_shutdown(struct se_device *dev) | |
885 | { | |
886 | int ret; | |
887 | ||
888 | spin_lock_irq(&dev->dev_status_lock); | |
889 | ret = (dev->dev_status & TRANSPORT_DEVICE_SHUTDOWN); | |
890 | spin_unlock_irq(&dev->dev_status_lock); | |
891 | ||
892 | return ret; | |
893 | } | |
894 | ||
895 | void se_dev_set_default_attribs( | |
896 | struct se_device *dev, | |
897 | struct se_dev_limits *dev_limits) | |
898 | { | |
899 | struct queue_limits *limits = &dev_limits->limits; | |
900 | ||
901 | DEV_ATTRIB(dev)->emulate_dpo = DA_EMULATE_DPO; | |
902 | DEV_ATTRIB(dev)->emulate_fua_write = DA_EMULATE_FUA_WRITE; | |
903 | DEV_ATTRIB(dev)->emulate_fua_read = DA_EMULATE_FUA_READ; | |
904 | DEV_ATTRIB(dev)->emulate_write_cache = DA_EMULATE_WRITE_CACHE; | |
905 | DEV_ATTRIB(dev)->emulate_ua_intlck_ctrl = DA_EMULATE_UA_INTLLCK_CTRL; | |
906 | DEV_ATTRIB(dev)->emulate_tas = DA_EMULATE_TAS; | |
907 | DEV_ATTRIB(dev)->emulate_tpu = DA_EMULATE_TPU; | |
908 | DEV_ATTRIB(dev)->emulate_tpws = DA_EMULATE_TPWS; | |
909 | DEV_ATTRIB(dev)->emulate_reservations = DA_EMULATE_RESERVATIONS; | |
910 | DEV_ATTRIB(dev)->emulate_alua = DA_EMULATE_ALUA; | |
911 | DEV_ATTRIB(dev)->enforce_pr_isids = DA_ENFORCE_PR_ISIDS; | |
912 | /* | |
913 | * The TPU=1 and TPWS=1 settings will be set in TCM/IBLOCK | |
914 | * iblock_create_virtdevice() from struct queue_limits values | |
915 | * if blk_queue_discard()==1 | |
916 | */ | |
917 | DEV_ATTRIB(dev)->max_unmap_lba_count = DA_MAX_UNMAP_LBA_COUNT; | |
918 | DEV_ATTRIB(dev)->max_unmap_block_desc_count = | |
919 | DA_MAX_UNMAP_BLOCK_DESC_COUNT; | |
920 | DEV_ATTRIB(dev)->unmap_granularity = DA_UNMAP_GRANULARITY_DEFAULT; | |
921 | DEV_ATTRIB(dev)->unmap_granularity_alignment = | |
922 | DA_UNMAP_GRANULARITY_ALIGNMENT_DEFAULT; | |
923 | /* | |
924 | * block_size is based on subsystem plugin dependent requirements. | |
925 | */ | |
926 | DEV_ATTRIB(dev)->hw_block_size = limits->logical_block_size; | |
927 | DEV_ATTRIB(dev)->block_size = limits->logical_block_size; | |
928 | /* | |
929 | * max_sectors is based on subsystem plugin dependent requirements. | |
930 | */ | |
931 | DEV_ATTRIB(dev)->hw_max_sectors = limits->max_hw_sectors; | |
932 | DEV_ATTRIB(dev)->max_sectors = limits->max_sectors; | |
933 | /* | |
934 | * Set optimal_sectors from max_sectors, which can be lowered via | |
935 | * configfs. | |
936 | */ | |
937 | DEV_ATTRIB(dev)->optimal_sectors = limits->max_sectors; | |
938 | /* | |
939 | * queue_depth is based on subsystem plugin dependent requirements. | |
940 | */ | |
941 | DEV_ATTRIB(dev)->hw_queue_depth = dev_limits->hw_queue_depth; | |
942 | DEV_ATTRIB(dev)->queue_depth = dev_limits->queue_depth; | |
943 | } | |
944 | ||
945 | int se_dev_set_task_timeout(struct se_device *dev, u32 task_timeout) | |
946 | { | |
947 | if (task_timeout > DA_TASK_TIMEOUT_MAX) { | |
948 | printk(KERN_ERR "dev[%p]: Passed task_timeout: %u larger then" | |
949 | " DA_TASK_TIMEOUT_MAX\n", dev, task_timeout); | |
950 | return -1; | |
951 | } else { | |
952 | DEV_ATTRIB(dev)->task_timeout = task_timeout; | |
953 | printk(KERN_INFO "dev[%p]: Set SE Device task_timeout: %u\n", | |
954 | dev, task_timeout); | |
955 | } | |
956 | ||
957 | return 0; | |
958 | } | |
959 | ||
960 | int se_dev_set_max_unmap_lba_count( | |
961 | struct se_device *dev, | |
962 | u32 max_unmap_lba_count) | |
963 | { | |
964 | DEV_ATTRIB(dev)->max_unmap_lba_count = max_unmap_lba_count; | |
965 | printk(KERN_INFO "dev[%p]: Set max_unmap_lba_count: %u\n", | |
966 | dev, DEV_ATTRIB(dev)->max_unmap_lba_count); | |
967 | return 0; | |
968 | } | |
969 | ||
970 | int se_dev_set_max_unmap_block_desc_count( | |
971 | struct se_device *dev, | |
972 | u32 max_unmap_block_desc_count) | |
973 | { | |
974 | DEV_ATTRIB(dev)->max_unmap_block_desc_count = max_unmap_block_desc_count; | |
975 | printk(KERN_INFO "dev[%p]: Set max_unmap_block_desc_count: %u\n", | |
976 | dev, DEV_ATTRIB(dev)->max_unmap_block_desc_count); | |
977 | return 0; | |
978 | } | |
979 | ||
980 | int se_dev_set_unmap_granularity( | |
981 | struct se_device *dev, | |
982 | u32 unmap_granularity) | |
983 | { | |
984 | DEV_ATTRIB(dev)->unmap_granularity = unmap_granularity; | |
985 | printk(KERN_INFO "dev[%p]: Set unmap_granularity: %u\n", | |
986 | dev, DEV_ATTRIB(dev)->unmap_granularity); | |
987 | return 0; | |
988 | } | |
989 | ||
990 | int se_dev_set_unmap_granularity_alignment( | |
991 | struct se_device *dev, | |
992 | u32 unmap_granularity_alignment) | |
993 | { | |
994 | DEV_ATTRIB(dev)->unmap_granularity_alignment = unmap_granularity_alignment; | |
995 | printk(KERN_INFO "dev[%p]: Set unmap_granularity_alignment: %u\n", | |
996 | dev, DEV_ATTRIB(dev)->unmap_granularity_alignment); | |
997 | return 0; | |
998 | } | |
999 | ||
1000 | int se_dev_set_emulate_dpo(struct se_device *dev, int flag) | |
1001 | { | |
1002 | if ((flag != 0) && (flag != 1)) { | |
1003 | printk(KERN_ERR "Illegal value %d\n", flag); | |
1004 | return -1; | |
1005 | } | |
1006 | if (TRANSPORT(dev)->dpo_emulated == NULL) { | |
1007 | printk(KERN_ERR "TRANSPORT(dev)->dpo_emulated is NULL\n"); | |
1008 | return -1; | |
1009 | } | |
1010 | if (TRANSPORT(dev)->dpo_emulated(dev) == 0) { | |
1011 | printk(KERN_ERR "TRANSPORT(dev)->dpo_emulated not supported\n"); | |
1012 | return -1; | |
1013 | } | |
1014 | DEV_ATTRIB(dev)->emulate_dpo = flag; | |
1015 | printk(KERN_INFO "dev[%p]: SE Device Page Out (DPO) Emulation" | |
1016 | " bit: %d\n", dev, DEV_ATTRIB(dev)->emulate_dpo); | |
1017 | return 0; | |
1018 | } | |
1019 | ||
1020 | int se_dev_set_emulate_fua_write(struct se_device *dev, int flag) | |
1021 | { | |
1022 | if ((flag != 0) && (flag != 1)) { | |
1023 | printk(KERN_ERR "Illegal value %d\n", flag); | |
1024 | return -1; | |
1025 | } | |
1026 | if (TRANSPORT(dev)->fua_write_emulated == NULL) { | |
1027 | printk(KERN_ERR "TRANSPORT(dev)->fua_write_emulated is NULL\n"); | |
1028 | return -1; | |
1029 | } | |
1030 | if (TRANSPORT(dev)->fua_write_emulated(dev) == 0) { | |
1031 | printk(KERN_ERR "TRANSPORT(dev)->fua_write_emulated not supported\n"); | |
1032 | return -1; | |
1033 | } | |
1034 | DEV_ATTRIB(dev)->emulate_fua_write = flag; | |
1035 | printk(KERN_INFO "dev[%p]: SE Device Forced Unit Access WRITEs: %d\n", | |
1036 | dev, DEV_ATTRIB(dev)->emulate_fua_write); | |
1037 | return 0; | |
1038 | } | |
1039 | ||
1040 | int se_dev_set_emulate_fua_read(struct se_device *dev, int flag) | |
1041 | { | |
1042 | if ((flag != 0) && (flag != 1)) { | |
1043 | printk(KERN_ERR "Illegal value %d\n", flag); | |
1044 | return -1; | |
1045 | } | |
1046 | if (TRANSPORT(dev)->fua_read_emulated == NULL) { | |
1047 | printk(KERN_ERR "TRANSPORT(dev)->fua_read_emulated is NULL\n"); | |
1048 | return -1; | |
1049 | } | |
1050 | if (TRANSPORT(dev)->fua_read_emulated(dev) == 0) { | |
1051 | printk(KERN_ERR "TRANSPORT(dev)->fua_read_emulated not supported\n"); | |
1052 | return -1; | |
1053 | } | |
1054 | DEV_ATTRIB(dev)->emulate_fua_read = flag; | |
1055 | printk(KERN_INFO "dev[%p]: SE Device Forced Unit Access READs: %d\n", | |
1056 | dev, DEV_ATTRIB(dev)->emulate_fua_read); | |
1057 | return 0; | |
1058 | } | |
1059 | ||
1060 | int se_dev_set_emulate_write_cache(struct se_device *dev, int flag) | |
1061 | { | |
1062 | if ((flag != 0) && (flag != 1)) { | |
1063 | printk(KERN_ERR "Illegal value %d\n", flag); | |
1064 | return -1; | |
1065 | } | |
1066 | if (TRANSPORT(dev)->write_cache_emulated == NULL) { | |
1067 | printk(KERN_ERR "TRANSPORT(dev)->write_cache_emulated is NULL\n"); | |
1068 | return -1; | |
1069 | } | |
1070 | if (TRANSPORT(dev)->write_cache_emulated(dev) == 0) { | |
1071 | printk(KERN_ERR "TRANSPORT(dev)->write_cache_emulated not supported\n"); | |
1072 | return -1; | |
1073 | } | |
1074 | DEV_ATTRIB(dev)->emulate_write_cache = flag; | |
1075 | printk(KERN_INFO "dev[%p]: SE Device WRITE_CACHE_EMULATION flag: %d\n", | |
1076 | dev, DEV_ATTRIB(dev)->emulate_write_cache); | |
1077 | return 0; | |
1078 | } | |
1079 | ||
1080 | int se_dev_set_emulate_ua_intlck_ctrl(struct se_device *dev, int flag) | |
1081 | { | |
1082 | if ((flag != 0) && (flag != 1) && (flag != 2)) { | |
1083 | printk(KERN_ERR "Illegal value %d\n", flag); | |
1084 | return -1; | |
1085 | } | |
1086 | ||
1087 | if (atomic_read(&dev->dev_export_obj.obj_access_count)) { | |
1088 | printk(KERN_ERR "dev[%p]: Unable to change SE Device" | |
1089 | " UA_INTRLCK_CTRL while dev_export_obj: %d count" | |
1090 | " exists\n", dev, | |
1091 | atomic_read(&dev->dev_export_obj.obj_access_count)); | |
1092 | return -1; | |
1093 | } | |
1094 | DEV_ATTRIB(dev)->emulate_ua_intlck_ctrl = flag; | |
1095 | printk(KERN_INFO "dev[%p]: SE Device UA_INTRLCK_CTRL flag: %d\n", | |
1096 | dev, DEV_ATTRIB(dev)->emulate_ua_intlck_ctrl); | |
1097 | ||
1098 | return 0; | |
1099 | } | |
1100 | ||
1101 | int se_dev_set_emulate_tas(struct se_device *dev, int flag) | |
1102 | { | |
1103 | if ((flag != 0) && (flag != 1)) { | |
1104 | printk(KERN_ERR "Illegal value %d\n", flag); | |
1105 | return -1; | |
1106 | } | |
1107 | ||
1108 | if (atomic_read(&dev->dev_export_obj.obj_access_count)) { | |
1109 | printk(KERN_ERR "dev[%p]: Unable to change SE Device TAS while" | |
1110 | " dev_export_obj: %d count exists\n", dev, | |
1111 | atomic_read(&dev->dev_export_obj.obj_access_count)); | |
1112 | return -1; | |
1113 | } | |
1114 | DEV_ATTRIB(dev)->emulate_tas = flag; | |
1115 | printk(KERN_INFO "dev[%p]: SE Device TASK_ABORTED status bit: %s\n", | |
1116 | dev, (DEV_ATTRIB(dev)->emulate_tas) ? "Enabled" : "Disabled"); | |
1117 | ||
1118 | return 0; | |
1119 | } | |
1120 | ||
1121 | int se_dev_set_emulate_tpu(struct se_device *dev, int flag) | |
1122 | { | |
1123 | if ((flag != 0) && (flag != 1)) { | |
1124 | printk(KERN_ERR "Illegal value %d\n", flag); | |
1125 | return -1; | |
1126 | } | |
1127 | /* | |
1128 | * We expect this value to be non-zero when generic Block Layer | |
1129 | * Discard supported is detected iblock_create_virtdevice(). | |
1130 | */ | |
1131 | if (!(DEV_ATTRIB(dev)->max_unmap_block_desc_count)) { | |
1132 | printk(KERN_ERR "Generic Block Discard not supported\n"); | |
1133 | return -ENOSYS; | |
1134 | } | |
1135 | ||
1136 | DEV_ATTRIB(dev)->emulate_tpu = flag; | |
1137 | printk(KERN_INFO "dev[%p]: SE Device Thin Provisioning UNMAP bit: %d\n", | |
1138 | dev, flag); | |
1139 | return 0; | |
1140 | } | |
1141 | ||
1142 | int se_dev_set_emulate_tpws(struct se_device *dev, int flag) | |
1143 | { | |
1144 | if ((flag != 0) && (flag != 1)) { | |
1145 | printk(KERN_ERR "Illegal value %d\n", flag); | |
1146 | return -1; | |
1147 | } | |
1148 | /* | |
1149 | * We expect this value to be non-zero when generic Block Layer | |
1150 | * Discard supported is detected iblock_create_virtdevice(). | |
1151 | */ | |
1152 | if (!(DEV_ATTRIB(dev)->max_unmap_block_desc_count)) { | |
1153 | printk(KERN_ERR "Generic Block Discard not supported\n"); | |
1154 | return -ENOSYS; | |
1155 | } | |
1156 | ||
1157 | DEV_ATTRIB(dev)->emulate_tpws = flag; | |
1158 | printk(KERN_INFO "dev[%p]: SE Device Thin Provisioning WRITE_SAME: %d\n", | |
1159 | dev, flag); | |
1160 | return 0; | |
1161 | } | |
1162 | ||
1163 | int se_dev_set_enforce_pr_isids(struct se_device *dev, int flag) | |
1164 | { | |
1165 | if ((flag != 0) && (flag != 1)) { | |
1166 | printk(KERN_ERR "Illegal value %d\n", flag); | |
1167 | return -1; | |
1168 | } | |
1169 | DEV_ATTRIB(dev)->enforce_pr_isids = flag; | |
1170 | printk(KERN_INFO "dev[%p]: SE Device enforce_pr_isids bit: %s\n", dev, | |
1171 | (DEV_ATTRIB(dev)->enforce_pr_isids) ? "Enabled" : "Disabled"); | |
1172 | return 0; | |
1173 | } | |
1174 | ||
1175 | /* | |
1176 | * Note, this can only be called on unexported SE Device Object. | |
1177 | */ | |
1178 | int se_dev_set_queue_depth(struct se_device *dev, u32 queue_depth) | |
1179 | { | |
1180 | u32 orig_queue_depth = dev->queue_depth; | |
1181 | ||
1182 | if (atomic_read(&dev->dev_export_obj.obj_access_count)) { | |
1183 | printk(KERN_ERR "dev[%p]: Unable to change SE Device TCQ while" | |
1184 | " dev_export_obj: %d count exists\n", dev, | |
1185 | atomic_read(&dev->dev_export_obj.obj_access_count)); | |
1186 | return -1; | |
1187 | } | |
1188 | if (!(queue_depth)) { | |
1189 | printk(KERN_ERR "dev[%p]: Illegal ZERO value for queue" | |
1190 | "_depth\n", dev); | |
1191 | return -1; | |
1192 | } | |
1193 | ||
1194 | if (TRANSPORT(dev)->transport_type == TRANSPORT_PLUGIN_PHBA_PDEV) { | |
1195 | if (queue_depth > DEV_ATTRIB(dev)->hw_queue_depth) { | |
1196 | printk(KERN_ERR "dev[%p]: Passed queue_depth: %u" | |
1197 | " exceeds TCM/SE_Device TCQ: %u\n", | |
1198 | dev, queue_depth, | |
1199 | DEV_ATTRIB(dev)->hw_queue_depth); | |
1200 | return -1; | |
1201 | } | |
1202 | } else { | |
1203 | if (queue_depth > DEV_ATTRIB(dev)->queue_depth) { | |
1204 | if (queue_depth > DEV_ATTRIB(dev)->hw_queue_depth) { | |
1205 | printk(KERN_ERR "dev[%p]: Passed queue_depth:" | |
1206 | " %u exceeds TCM/SE_Device MAX" | |
1207 | " TCQ: %u\n", dev, queue_depth, | |
1208 | DEV_ATTRIB(dev)->hw_queue_depth); | |
1209 | return -1; | |
1210 | } | |
1211 | } | |
1212 | } | |
1213 | ||
1214 | DEV_ATTRIB(dev)->queue_depth = dev->queue_depth = queue_depth; | |
1215 | if (queue_depth > orig_queue_depth) | |
1216 | atomic_add(queue_depth - orig_queue_depth, &dev->depth_left); | |
1217 | else if (queue_depth < orig_queue_depth) | |
1218 | atomic_sub(orig_queue_depth - queue_depth, &dev->depth_left); | |
1219 | ||
1220 | printk(KERN_INFO "dev[%p]: SE Device TCQ Depth changed to: %u\n", | |
1221 | dev, queue_depth); | |
1222 | return 0; | |
1223 | } | |
1224 | ||
1225 | int se_dev_set_max_sectors(struct se_device *dev, u32 max_sectors) | |
1226 | { | |
1227 | int force = 0; /* Force setting for VDEVS */ | |
1228 | ||
1229 | if (atomic_read(&dev->dev_export_obj.obj_access_count)) { | |
1230 | printk(KERN_ERR "dev[%p]: Unable to change SE Device" | |
1231 | " max_sectors while dev_export_obj: %d count exists\n", | |
1232 | dev, atomic_read(&dev->dev_export_obj.obj_access_count)); | |
1233 | return -1; | |
1234 | } | |
1235 | if (!(max_sectors)) { | |
1236 | printk(KERN_ERR "dev[%p]: Illegal ZERO value for" | |
1237 | " max_sectors\n", dev); | |
1238 | return -1; | |
1239 | } | |
1240 | if (max_sectors < DA_STATUS_MAX_SECTORS_MIN) { | |
1241 | printk(KERN_ERR "dev[%p]: Passed max_sectors: %u less than" | |
1242 | " DA_STATUS_MAX_SECTORS_MIN: %u\n", dev, max_sectors, | |
1243 | DA_STATUS_MAX_SECTORS_MIN); | |
1244 | return -1; | |
1245 | } | |
1246 | if (TRANSPORT(dev)->transport_type == TRANSPORT_PLUGIN_PHBA_PDEV) { | |
1247 | if (max_sectors > DEV_ATTRIB(dev)->hw_max_sectors) { | |
1248 | printk(KERN_ERR "dev[%p]: Passed max_sectors: %u" | |
1249 | " greater than TCM/SE_Device max_sectors:" | |
1250 | " %u\n", dev, max_sectors, | |
1251 | DEV_ATTRIB(dev)->hw_max_sectors); | |
1252 | return -1; | |
1253 | } | |
1254 | } else { | |
1255 | if (!(force) && (max_sectors > | |
1256 | DEV_ATTRIB(dev)->hw_max_sectors)) { | |
1257 | printk(KERN_ERR "dev[%p]: Passed max_sectors: %u" | |
1258 | " greater than TCM/SE_Device max_sectors" | |
1259 | ": %u, use force=1 to override.\n", dev, | |
1260 | max_sectors, DEV_ATTRIB(dev)->hw_max_sectors); | |
1261 | return -1; | |
1262 | } | |
1263 | if (max_sectors > DA_STATUS_MAX_SECTORS_MAX) { | |
1264 | printk(KERN_ERR "dev[%p]: Passed max_sectors: %u" | |
1265 | " greater than DA_STATUS_MAX_SECTORS_MAX:" | |
1266 | " %u\n", dev, max_sectors, | |
1267 | DA_STATUS_MAX_SECTORS_MAX); | |
1268 | return -1; | |
1269 | } | |
1270 | } | |
1271 | ||
1272 | DEV_ATTRIB(dev)->max_sectors = max_sectors; | |
1273 | printk("dev[%p]: SE Device max_sectors changed to %u\n", | |
1274 | dev, max_sectors); | |
1275 | return 0; | |
1276 | } | |
1277 | ||
1278 | int se_dev_set_optimal_sectors(struct se_device *dev, u32 optimal_sectors) | |
1279 | { | |
1280 | if (atomic_read(&dev->dev_export_obj.obj_access_count)) { | |
1281 | printk(KERN_ERR "dev[%p]: Unable to change SE Device" | |
1282 | " optimal_sectors while dev_export_obj: %d count exists\n", | |
1283 | dev, atomic_read(&dev->dev_export_obj.obj_access_count)); | |
1284 | return -EINVAL; | |
1285 | } | |
1286 | if (TRANSPORT(dev)->transport_type == TRANSPORT_PLUGIN_PHBA_PDEV) { | |
1287 | printk(KERN_ERR "dev[%p]: Passed optimal_sectors cannot be" | |
1288 | " changed for TCM/pSCSI\n", dev); | |
1289 | return -EINVAL; | |
1290 | } | |
1291 | if (optimal_sectors > DEV_ATTRIB(dev)->max_sectors) { | |
1292 | printk(KERN_ERR "dev[%p]: Passed optimal_sectors %u cannot be" | |
1293 | " greater than max_sectors: %u\n", dev, | |
1294 | optimal_sectors, DEV_ATTRIB(dev)->max_sectors); | |
1295 | return -EINVAL; | |
1296 | } | |
1297 | ||
1298 | DEV_ATTRIB(dev)->optimal_sectors = optimal_sectors; | |
1299 | printk(KERN_INFO "dev[%p]: SE Device optimal_sectors changed to %u\n", | |
1300 | dev, optimal_sectors); | |
1301 | return 0; | |
1302 | } | |
1303 | ||
1304 | int se_dev_set_block_size(struct se_device *dev, u32 block_size) | |
1305 | { | |
1306 | if (atomic_read(&dev->dev_export_obj.obj_access_count)) { | |
1307 | printk(KERN_ERR "dev[%p]: Unable to change SE Device block_size" | |
1308 | " while dev_export_obj: %d count exists\n", dev, | |
1309 | atomic_read(&dev->dev_export_obj.obj_access_count)); | |
1310 | return -1; | |
1311 | } | |
1312 | ||
1313 | if ((block_size != 512) && | |
1314 | (block_size != 1024) && | |
1315 | (block_size != 2048) && | |
1316 | (block_size != 4096)) { | |
1317 | printk(KERN_ERR "dev[%p]: Illegal value for block_device: %u" | |
1318 | " for SE device, must be 512, 1024, 2048 or 4096\n", | |
1319 | dev, block_size); | |
1320 | return -1; | |
1321 | } | |
1322 | ||
1323 | if (TRANSPORT(dev)->transport_type == TRANSPORT_PLUGIN_PHBA_PDEV) { | |
1324 | printk(KERN_ERR "dev[%p]: Not allowed to change block_size for" | |
1325 | " Physical Device, use for Linux/SCSI to change" | |
1326 | " block_size for underlying hardware\n", dev); | |
1327 | return -1; | |
1328 | } | |
1329 | ||
1330 | DEV_ATTRIB(dev)->block_size = block_size; | |
1331 | printk(KERN_INFO "dev[%p]: SE Device block_size changed to %u\n", | |
1332 | dev, block_size); | |
1333 | return 0; | |
1334 | } | |
1335 | ||
1336 | struct se_lun *core_dev_add_lun( | |
1337 | struct se_portal_group *tpg, | |
1338 | struct se_hba *hba, | |
1339 | struct se_device *dev, | |
1340 | u32 lun) | |
1341 | { | |
1342 | struct se_lun *lun_p; | |
1343 | u32 lun_access = 0; | |
1344 | ||
1345 | if (atomic_read(&dev->dev_access_obj.obj_access_count) != 0) { | |
1346 | printk(KERN_ERR "Unable to export struct se_device while dev_access_obj: %d\n", | |
1347 | atomic_read(&dev->dev_access_obj.obj_access_count)); | |
1348 | return NULL; | |
1349 | } | |
1350 | ||
1351 | lun_p = core_tpg_pre_addlun(tpg, lun); | |
1352 | if ((IS_ERR(lun_p)) || !(lun_p)) | |
1353 | return NULL; | |
1354 | ||
1355 | if (dev->dev_flags & DF_READ_ONLY) | |
1356 | lun_access = TRANSPORT_LUNFLAGS_READ_ONLY; | |
1357 | else | |
1358 | lun_access = TRANSPORT_LUNFLAGS_READ_WRITE; | |
1359 | ||
1360 | if (core_tpg_post_addlun(tpg, lun_p, lun_access, dev) < 0) | |
1361 | return NULL; | |
1362 | ||
1363 | printk(KERN_INFO "%s_TPG[%u]_LUN[%u] - Activated %s Logical Unit from" | |
1364 | " CORE HBA: %u\n", TPG_TFO(tpg)->get_fabric_name(), | |
1365 | TPG_TFO(tpg)->tpg_get_tag(tpg), lun_p->unpacked_lun, | |
1366 | TPG_TFO(tpg)->get_fabric_name(), hba->hba_id); | |
1367 | /* | |
1368 | * Update LUN maps for dynamically added initiators when | |
1369 | * generate_node_acl is enabled. | |
1370 | */ | |
1371 | if (TPG_TFO(tpg)->tpg_check_demo_mode(tpg)) { | |
1372 | struct se_node_acl *acl; | |
1373 | spin_lock_bh(&tpg->acl_node_lock); | |
1374 | list_for_each_entry(acl, &tpg->acl_node_list, acl_list) { | |
1375 | if (acl->dynamic_node_acl) { | |
1376 | spin_unlock_bh(&tpg->acl_node_lock); | |
1377 | core_tpg_add_node_to_devs(acl, tpg); | |
1378 | spin_lock_bh(&tpg->acl_node_lock); | |
1379 | } | |
1380 | } | |
1381 | spin_unlock_bh(&tpg->acl_node_lock); | |
1382 | } | |
1383 | ||
1384 | return lun_p; | |
1385 | } | |
1386 | ||
1387 | /* core_dev_del_lun(): | |
1388 | * | |
1389 | * | |
1390 | */ | |
1391 | int core_dev_del_lun( | |
1392 | struct se_portal_group *tpg, | |
1393 | u32 unpacked_lun) | |
1394 | { | |
1395 | struct se_lun *lun; | |
1396 | int ret = 0; | |
1397 | ||
1398 | lun = core_tpg_pre_dellun(tpg, unpacked_lun, &ret); | |
1399 | if (!(lun)) | |
1400 | return ret; | |
1401 | ||
1402 | core_tpg_post_dellun(tpg, lun); | |
1403 | ||
1404 | printk(KERN_INFO "%s_TPG[%u]_LUN[%u] - Deactivated %s Logical Unit from" | |
1405 | " device object\n", TPG_TFO(tpg)->get_fabric_name(), | |
1406 | TPG_TFO(tpg)->tpg_get_tag(tpg), unpacked_lun, | |
1407 | TPG_TFO(tpg)->get_fabric_name()); | |
1408 | ||
1409 | return 0; | |
1410 | } | |
1411 | ||
1412 | struct se_lun *core_get_lun_from_tpg(struct se_portal_group *tpg, u32 unpacked_lun) | |
1413 | { | |
1414 | struct se_lun *lun; | |
1415 | ||
1416 | spin_lock(&tpg->tpg_lun_lock); | |
1417 | if (unpacked_lun > (TRANSPORT_MAX_LUNS_PER_TPG-1)) { | |
1418 | printk(KERN_ERR "%s LUN: %u exceeds TRANSPORT_MAX_LUNS" | |
1419 | "_PER_TPG-1: %u for Target Portal Group: %hu\n", | |
1420 | TPG_TFO(tpg)->get_fabric_name(), unpacked_lun, | |
1421 | TRANSPORT_MAX_LUNS_PER_TPG-1, | |
1422 | TPG_TFO(tpg)->tpg_get_tag(tpg)); | |
1423 | spin_unlock(&tpg->tpg_lun_lock); | |
1424 | return NULL; | |
1425 | } | |
1426 | lun = &tpg->tpg_lun_list[unpacked_lun]; | |
1427 | ||
1428 | if (lun->lun_status != TRANSPORT_LUN_STATUS_FREE) { | |
1429 | printk(KERN_ERR "%s Logical Unit Number: %u is not free on" | |
1430 | " Target Portal Group: %hu, ignoring request.\n", | |
1431 | TPG_TFO(tpg)->get_fabric_name(), unpacked_lun, | |
1432 | TPG_TFO(tpg)->tpg_get_tag(tpg)); | |
1433 | spin_unlock(&tpg->tpg_lun_lock); | |
1434 | return NULL; | |
1435 | } | |
1436 | spin_unlock(&tpg->tpg_lun_lock); | |
1437 | ||
1438 | return lun; | |
1439 | } | |
1440 | ||
1441 | /* core_dev_get_lun(): | |
1442 | * | |
1443 | * | |
1444 | */ | |
1445 | static struct se_lun *core_dev_get_lun(struct se_portal_group *tpg, u32 unpacked_lun) | |
1446 | { | |
1447 | struct se_lun *lun; | |
1448 | ||
1449 | spin_lock(&tpg->tpg_lun_lock); | |
1450 | if (unpacked_lun > (TRANSPORT_MAX_LUNS_PER_TPG-1)) { | |
1451 | printk(KERN_ERR "%s LUN: %u exceeds TRANSPORT_MAX_LUNS_PER" | |
1452 | "_TPG-1: %u for Target Portal Group: %hu\n", | |
1453 | TPG_TFO(tpg)->get_fabric_name(), unpacked_lun, | |
1454 | TRANSPORT_MAX_LUNS_PER_TPG-1, | |
1455 | TPG_TFO(tpg)->tpg_get_tag(tpg)); | |
1456 | spin_unlock(&tpg->tpg_lun_lock); | |
1457 | return NULL; | |
1458 | } | |
1459 | lun = &tpg->tpg_lun_list[unpacked_lun]; | |
1460 | ||
1461 | if (lun->lun_status != TRANSPORT_LUN_STATUS_ACTIVE) { | |
1462 | printk(KERN_ERR "%s Logical Unit Number: %u is not active on" | |
1463 | " Target Portal Group: %hu, ignoring request.\n", | |
1464 | TPG_TFO(tpg)->get_fabric_name(), unpacked_lun, | |
1465 | TPG_TFO(tpg)->tpg_get_tag(tpg)); | |
1466 | spin_unlock(&tpg->tpg_lun_lock); | |
1467 | return NULL; | |
1468 | } | |
1469 | spin_unlock(&tpg->tpg_lun_lock); | |
1470 | ||
1471 | return lun; | |
1472 | } | |
1473 | ||
1474 | struct se_lun_acl *core_dev_init_initiator_node_lun_acl( | |
1475 | struct se_portal_group *tpg, | |
1476 | u32 mapped_lun, | |
1477 | char *initiatorname, | |
1478 | int *ret) | |
1479 | { | |
1480 | struct se_lun_acl *lacl; | |
1481 | struct se_node_acl *nacl; | |
1482 | ||
1483 | if (strlen(initiatorname) > TRANSPORT_IQN_LEN) { | |
1484 | printk(KERN_ERR "%s InitiatorName exceeds maximum size.\n", | |
1485 | TPG_TFO(tpg)->get_fabric_name()); | |
1486 | *ret = -EOVERFLOW; | |
1487 | return NULL; | |
1488 | } | |
1489 | nacl = core_tpg_get_initiator_node_acl(tpg, initiatorname); | |
1490 | if (!(nacl)) { | |
1491 | *ret = -EINVAL; | |
1492 | return NULL; | |
1493 | } | |
1494 | lacl = kzalloc(sizeof(struct se_lun_acl), GFP_KERNEL); | |
1495 | if (!(lacl)) { | |
1496 | printk(KERN_ERR "Unable to allocate memory for struct se_lun_acl.\n"); | |
1497 | *ret = -ENOMEM; | |
1498 | return NULL; | |
1499 | } | |
1500 | ||
1501 | INIT_LIST_HEAD(&lacl->lacl_list); | |
1502 | lacl->mapped_lun = mapped_lun; | |
1503 | lacl->se_lun_nacl = nacl; | |
1504 | snprintf(lacl->initiatorname, TRANSPORT_IQN_LEN, "%s", initiatorname); | |
1505 | ||
1506 | return lacl; | |
1507 | } | |
1508 | ||
1509 | int core_dev_add_initiator_node_lun_acl( | |
1510 | struct se_portal_group *tpg, | |
1511 | struct se_lun_acl *lacl, | |
1512 | u32 unpacked_lun, | |
1513 | u32 lun_access) | |
1514 | { | |
1515 | struct se_lun *lun; | |
1516 | struct se_node_acl *nacl; | |
1517 | ||
1518 | lun = core_dev_get_lun(tpg, unpacked_lun); | |
1519 | if (!(lun)) { | |
1520 | printk(KERN_ERR "%s Logical Unit Number: %u is not active on" | |
1521 | " Target Portal Group: %hu, ignoring request.\n", | |
1522 | TPG_TFO(tpg)->get_fabric_name(), unpacked_lun, | |
1523 | TPG_TFO(tpg)->tpg_get_tag(tpg)); | |
1524 | return -EINVAL; | |
1525 | } | |
1526 | ||
1527 | nacl = lacl->se_lun_nacl; | |
1528 | if (!(nacl)) | |
1529 | return -EINVAL; | |
1530 | ||
1531 | if ((lun->lun_access & TRANSPORT_LUNFLAGS_READ_ONLY) && | |
1532 | (lun_access & TRANSPORT_LUNFLAGS_READ_WRITE)) | |
1533 | lun_access = TRANSPORT_LUNFLAGS_READ_ONLY; | |
1534 | ||
1535 | lacl->se_lun = lun; | |
1536 | ||
1537 | if (core_update_device_list_for_node(lun, lacl, lacl->mapped_lun, | |
1538 | lun_access, nacl, tpg, 1) < 0) | |
1539 | return -EINVAL; | |
1540 | ||
1541 | spin_lock(&lun->lun_acl_lock); | |
1542 | list_add_tail(&lacl->lacl_list, &lun->lun_acl_list); | |
1543 | atomic_inc(&lun->lun_acl_count); | |
1544 | smp_mb__after_atomic_inc(); | |
1545 | spin_unlock(&lun->lun_acl_lock); | |
1546 | ||
1547 | printk(KERN_INFO "%s_TPG[%hu]_LUN[%u->%u] - Added %s ACL for " | |
1548 | " InitiatorNode: %s\n", TPG_TFO(tpg)->get_fabric_name(), | |
1549 | TPG_TFO(tpg)->tpg_get_tag(tpg), unpacked_lun, lacl->mapped_lun, | |
1550 | (lun_access & TRANSPORT_LUNFLAGS_READ_WRITE) ? "RW" : "RO", | |
1551 | lacl->initiatorname); | |
1552 | /* | |
1553 | * Check to see if there are any existing persistent reservation APTPL | |
1554 | * pre-registrations that need to be enabled for this LUN ACL.. | |
1555 | */ | |
1556 | core_scsi3_check_aptpl_registration(lun->lun_se_dev, tpg, lun, lacl); | |
1557 | return 0; | |
1558 | } | |
1559 | ||
1560 | /* core_dev_del_initiator_node_lun_acl(): | |
1561 | * | |
1562 | * | |
1563 | */ | |
1564 | int core_dev_del_initiator_node_lun_acl( | |
1565 | struct se_portal_group *tpg, | |
1566 | struct se_lun *lun, | |
1567 | struct se_lun_acl *lacl) | |
1568 | { | |
1569 | struct se_node_acl *nacl; | |
1570 | ||
1571 | nacl = lacl->se_lun_nacl; | |
1572 | if (!(nacl)) | |
1573 | return -EINVAL; | |
1574 | ||
1575 | spin_lock(&lun->lun_acl_lock); | |
1576 | list_del(&lacl->lacl_list); | |
1577 | atomic_dec(&lun->lun_acl_count); | |
1578 | smp_mb__after_atomic_dec(); | |
1579 | spin_unlock(&lun->lun_acl_lock); | |
1580 | ||
1581 | core_update_device_list_for_node(lun, NULL, lacl->mapped_lun, | |
1582 | TRANSPORT_LUNFLAGS_NO_ACCESS, nacl, tpg, 0); | |
1583 | ||
1584 | lacl->se_lun = NULL; | |
1585 | ||
1586 | printk(KERN_INFO "%s_TPG[%hu]_LUN[%u] - Removed ACL for" | |
1587 | " InitiatorNode: %s Mapped LUN: %u\n", | |
1588 | TPG_TFO(tpg)->get_fabric_name(), | |
1589 | TPG_TFO(tpg)->tpg_get_tag(tpg), lun->unpacked_lun, | |
1590 | lacl->initiatorname, lacl->mapped_lun); | |
1591 | ||
1592 | return 0; | |
1593 | } | |
1594 | ||
1595 | void core_dev_free_initiator_node_lun_acl( | |
1596 | struct se_portal_group *tpg, | |
1597 | struct se_lun_acl *lacl) | |
1598 | { | |
1599 | printk("%s_TPG[%hu] - Freeing ACL for %s InitiatorNode: %s" | |
1600 | " Mapped LUN: %u\n", TPG_TFO(tpg)->get_fabric_name(), | |
1601 | TPG_TFO(tpg)->tpg_get_tag(tpg), | |
1602 | TPG_TFO(tpg)->get_fabric_name(), | |
1603 | lacl->initiatorname, lacl->mapped_lun); | |
1604 | ||
1605 | kfree(lacl); | |
1606 | } | |
1607 | ||
1608 | int core_dev_setup_virtual_lun0(void) | |
1609 | { | |
1610 | struct se_hba *hba; | |
1611 | struct se_device *dev; | |
1612 | struct se_subsystem_dev *se_dev = NULL; | |
1613 | struct se_subsystem_api *t; | |
1614 | char buf[16]; | |
1615 | int ret; | |
1616 | ||
1617 | hba = core_alloc_hba("rd_dr", 0, HBA_FLAGS_INTERNAL_USE); | |
1618 | if (IS_ERR(hba)) | |
1619 | return PTR_ERR(hba); | |
1620 | ||
1621 | se_global->g_lun0_hba = hba; | |
1622 | t = hba->transport; | |
1623 | ||
1624 | se_dev = kzalloc(sizeof(struct se_subsystem_dev), GFP_KERNEL); | |
1625 | if (!(se_dev)) { | |
1626 | printk(KERN_ERR "Unable to allocate memory for" | |
1627 | " struct se_subsystem_dev\n"); | |
1628 | ret = -ENOMEM; | |
1629 | goto out; | |
1630 | } | |
1631 | INIT_LIST_HEAD(&se_dev->g_se_dev_list); | |
1632 | INIT_LIST_HEAD(&se_dev->t10_wwn.t10_vpd_list); | |
1633 | spin_lock_init(&se_dev->t10_wwn.t10_vpd_lock); | |
1634 | INIT_LIST_HEAD(&se_dev->t10_reservation.registration_list); | |
1635 | INIT_LIST_HEAD(&se_dev->t10_reservation.aptpl_reg_list); | |
1636 | spin_lock_init(&se_dev->t10_reservation.registration_lock); | |
1637 | spin_lock_init(&se_dev->t10_reservation.aptpl_reg_lock); | |
1638 | INIT_LIST_HEAD(&se_dev->t10_alua.tg_pt_gps_list); | |
1639 | spin_lock_init(&se_dev->t10_alua.tg_pt_gps_lock); | |
1640 | spin_lock_init(&se_dev->se_dev_lock); | |
1641 | se_dev->t10_reservation.pr_aptpl_buf_len = PR_APTPL_BUF_LEN; | |
1642 | se_dev->t10_wwn.t10_sub_dev = se_dev; | |
1643 | se_dev->t10_alua.t10_sub_dev = se_dev; | |
1644 | se_dev->se_dev_attrib.da_sub_dev = se_dev; | |
1645 | se_dev->se_dev_hba = hba; | |
1646 | ||
1647 | se_dev->se_dev_su_ptr = t->allocate_virtdevice(hba, "virt_lun0"); | |
1648 | if (!(se_dev->se_dev_su_ptr)) { | |
1649 | printk(KERN_ERR "Unable to locate subsystem dependent pointer" | |
1650 | " from allocate_virtdevice()\n"); | |
1651 | ret = -ENOMEM; | |
1652 | goto out; | |
1653 | } | |
1654 | se_global->g_lun0_su_dev = se_dev; | |
1655 | ||
1656 | memset(buf, 0, 16); | |
1657 | sprintf(buf, "rd_pages=8"); | |
1658 | t->set_configfs_dev_params(hba, se_dev, buf, sizeof(buf)); | |
1659 | ||
1660 | dev = t->create_virtdevice(hba, se_dev, se_dev->se_dev_su_ptr); | |
1661 | if (!(dev) || IS_ERR(dev)) { | |
1662 | ret = -ENOMEM; | |
1663 | goto out; | |
1664 | } | |
1665 | se_dev->se_dev_ptr = dev; | |
1666 | se_global->g_lun0_dev = dev; | |
1667 | ||
1668 | return 0; | |
1669 | out: | |
1670 | se_global->g_lun0_su_dev = NULL; | |
1671 | kfree(se_dev); | |
1672 | if (se_global->g_lun0_hba) { | |
1673 | core_delete_hba(se_global->g_lun0_hba); | |
1674 | se_global->g_lun0_hba = NULL; | |
1675 | } | |
1676 | return ret; | |
1677 | } | |
1678 | ||
1679 | ||
1680 | void core_dev_release_virtual_lun0(void) | |
1681 | { | |
1682 | struct se_hba *hba = se_global->g_lun0_hba; | |
1683 | struct se_subsystem_dev *su_dev = se_global->g_lun0_su_dev; | |
1684 | ||
1685 | if (!(hba)) | |
1686 | return; | |
1687 | ||
1688 | if (se_global->g_lun0_dev) | |
1689 | se_free_virtual_device(se_global->g_lun0_dev, hba); | |
1690 | ||
1691 | kfree(su_dev); | |
1692 | core_delete_hba(hba); | |
1693 | } |