[SCSI] target: Convert REPORT_LUNs to use int_to_scsilun
[linux-2.6.git] / drivers / target / target_core_device.c
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/kthread.h>
37 #include <linux/in.h>
38 #include <net/sock.h>
39 #include <net/tcp.h>
40 #include <scsi/scsi.h>
41 #include <scsi/scsi_device.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_irq(&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_irq(&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 explicitly concerted to MappedLUNs ->
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..
380                  */
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");
398                                 spin_unlock_irq(&nacl->device_list_lock);
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");
405                                 spin_unlock_irq(&nacl->device_list_lock);
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         __releases(&dev->se_port_lock) __acquires(&dev->se_port_lock)
594 {
595         /*
596          * Wait for any port reference for PR ALL_TG_PT=1 operation
597          * to complete in __core_scsi3_alloc_registration()
598          */
599         spin_unlock(&dev->se_port_lock);
600         if (atomic_read(&port->sep_tg_pt_ref_cnt))
601                 cpu_relax();
602         spin_lock(&dev->se_port_lock);
603
604         core_alua_free_tg_pt_gp_mem(port);
605
606         list_del(&port->sep_list);
607         dev->dev_port_count--;
608         kfree(port);
609
610         return;
611 }
612
613 int core_dev_export(
614         struct se_device *dev,
615         struct se_portal_group *tpg,
616         struct se_lun *lun)
617 {
618         struct se_port *port;
619
620         port = core_alloc_port(dev);
621         if (!(port))
622                 return -1;
623
624         lun->lun_se_dev = dev;
625         se_dev_start(dev);
626
627         atomic_inc(&dev->dev_export_obj.obj_access_count);
628         core_export_port(dev, tpg, port, lun);
629         return 0;
630 }
631
632 void core_dev_unexport(
633         struct se_device *dev,
634         struct se_portal_group *tpg,
635         struct se_lun *lun)
636 {
637         struct se_port *port = lun->lun_sep;
638
639         spin_lock(&lun->lun_sep_lock);
640         if (lun->lun_se_dev == NULL) {
641                 spin_unlock(&lun->lun_sep_lock);
642                 return;
643         }
644         spin_unlock(&lun->lun_sep_lock);
645
646         spin_lock(&dev->se_port_lock);
647         atomic_dec(&dev->dev_export_obj.obj_access_count);
648         core_release_port(dev, port);
649         spin_unlock(&dev->se_port_lock);
650
651         se_dev_stop(dev);
652         lun->lun_se_dev = NULL;
653 }
654
655 int transport_core_report_lun_response(struct se_cmd *se_cmd)
656 {
657         struct se_dev_entry *deve;
658         struct se_lun *se_lun;
659         struct se_session *se_sess = SE_SESS(se_cmd);
660         struct se_task *se_task;
661         unsigned char *buf = (unsigned char *)T_TASK(se_cmd)->t_task_buf;
662         u32 cdb_offset = 0, lun_count = 0, offset = 8, i;
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                 int_to_scsilun(0, (struct scsi_lun *)&buf[offset]);
679                 lun_count = 1;
680                 goto done;
681         }
682
683         spin_lock_irq(&SE_NODE_ACL(se_sess)->device_list_lock);
684         for (i = 0; i < TRANSPORT_MAX_LUNS_PER_TPG; i++) {
685                 deve = &SE_NODE_ACL(se_sess)->device_list[i];
686                 if (!(deve->lun_flags & TRANSPORT_LUNFLAGS_INITIATOR_ACCESS))
687                         continue;
688                 se_lun = deve->se_lun;
689                 /*
690                  * We determine the correct LUN LIST LENGTH even once we
691                  * have reached the initial allocation length.
692                  * See SPC2-R20 7.19.
693                  */
694                 lun_count++;
695                 if ((cdb_offset + 8) >= se_cmd->data_length)
696                         continue;
697
698                 int_to_scsilun(deve->mapped_lun, (struct scsi_lun *)&buf[offset]);
699                 offset += 8;
700                 cdb_offset += 8;
701         }
702         spin_unlock_irq(&SE_NODE_ACL(se_sess)->device_list_lock);
703
704         /*
705          * See SPC3 r07, page 159.
706          */
707 done:
708         lun_count *= 8;
709         buf[0] = ((lun_count >> 24) & 0xff);
710         buf[1] = ((lun_count >> 16) & 0xff);
711         buf[2] = ((lun_count >> 8) & 0xff);
712         buf[3] = (lun_count & 0xff);
713
714         return PYX_TRANSPORT_SENT_TO_TRANSPORT;
715 }
716
717 /*      se_release_device_for_hba():
718  *
719  *
720  */
721 void se_release_device_for_hba(struct se_device *dev)
722 {
723         struct se_hba *hba = dev->se_hba;
724
725         if ((dev->dev_status & TRANSPORT_DEVICE_ACTIVATED) ||
726             (dev->dev_status & TRANSPORT_DEVICE_DEACTIVATED) ||
727             (dev->dev_status & TRANSPORT_DEVICE_SHUTDOWN) ||
728             (dev->dev_status & TRANSPORT_DEVICE_OFFLINE_ACTIVATED) ||
729             (dev->dev_status & TRANSPORT_DEVICE_OFFLINE_DEACTIVATED))
730                 se_dev_stop(dev);
731
732         if (dev->dev_ptr) {
733                 kthread_stop(dev->process_thread);
734                 if (dev->transport->free_device)
735                         dev->transport->free_device(dev->dev_ptr);
736         }
737
738         spin_lock(&hba->device_lock);
739         list_del(&dev->dev_list);
740         hba->dev_count--;
741         spin_unlock(&hba->device_lock);
742
743         core_scsi3_free_all_registrations(dev);
744         se_release_vpd_for_dev(dev);
745
746         kfree(dev->dev_status_queue_obj);
747         kfree(dev->dev_queue_obj);
748         kfree(dev);
749
750         return;
751 }
752
753 void se_release_vpd_for_dev(struct se_device *dev)
754 {
755         struct t10_vpd *vpd, *vpd_tmp;
756
757         spin_lock(&DEV_T10_WWN(dev)->t10_vpd_lock);
758         list_for_each_entry_safe(vpd, vpd_tmp,
759                         &DEV_T10_WWN(dev)->t10_vpd_list, vpd_list) {
760                 list_del(&vpd->vpd_list);
761                 kfree(vpd);
762         }
763         spin_unlock(&DEV_T10_WWN(dev)->t10_vpd_lock);
764
765         return;
766 }
767
768 /*      se_free_virtual_device():
769  *
770  *      Used for IBLOCK, RAMDISK, and FILEIO Transport Drivers.
771  */
772 int se_free_virtual_device(struct se_device *dev, struct se_hba *hba)
773 {
774         if (!list_empty(&dev->dev_sep_list))
775                 dump_stack();
776
777         core_alua_free_lu_gp_mem(dev);
778         se_release_device_for_hba(dev);
779
780         return 0;
781 }
782
783 static void se_dev_start(struct se_device *dev)
784 {
785         struct se_hba *hba = dev->se_hba;
786
787         spin_lock(&hba->device_lock);
788         atomic_inc(&dev->dev_obj.obj_access_count);
789         if (atomic_read(&dev->dev_obj.obj_access_count) == 1) {
790                 if (dev->dev_status & TRANSPORT_DEVICE_DEACTIVATED) {
791                         dev->dev_status &= ~TRANSPORT_DEVICE_DEACTIVATED;
792                         dev->dev_status |= TRANSPORT_DEVICE_ACTIVATED;
793                 } else if (dev->dev_status &
794                            TRANSPORT_DEVICE_OFFLINE_DEACTIVATED) {
795                         dev->dev_status &=
796                                 ~TRANSPORT_DEVICE_OFFLINE_DEACTIVATED;
797                         dev->dev_status |= TRANSPORT_DEVICE_OFFLINE_ACTIVATED;
798                 }
799         }
800         spin_unlock(&hba->device_lock);
801 }
802
803 static void se_dev_stop(struct se_device *dev)
804 {
805         struct se_hba *hba = dev->se_hba;
806
807         spin_lock(&hba->device_lock);
808         atomic_dec(&dev->dev_obj.obj_access_count);
809         if (atomic_read(&dev->dev_obj.obj_access_count) == 0) {
810                 if (dev->dev_status & TRANSPORT_DEVICE_ACTIVATED) {
811                         dev->dev_status &= ~TRANSPORT_DEVICE_ACTIVATED;
812                         dev->dev_status |= TRANSPORT_DEVICE_DEACTIVATED;
813                 } else if (dev->dev_status &
814                            TRANSPORT_DEVICE_OFFLINE_ACTIVATED) {
815                         dev->dev_status &= ~TRANSPORT_DEVICE_OFFLINE_ACTIVATED;
816                         dev->dev_status |= TRANSPORT_DEVICE_OFFLINE_DEACTIVATED;
817                 }
818         }
819         spin_unlock(&hba->device_lock);
820 }
821
822 int se_dev_check_online(struct se_device *dev)
823 {
824         int ret;
825
826         spin_lock_irq(&dev->dev_status_lock);
827         ret = ((dev->dev_status & TRANSPORT_DEVICE_ACTIVATED) ||
828                (dev->dev_status & TRANSPORT_DEVICE_DEACTIVATED)) ? 0 : 1;
829         spin_unlock_irq(&dev->dev_status_lock);
830
831         return ret;
832 }
833
834 int se_dev_check_shutdown(struct se_device *dev)
835 {
836         int ret;
837
838         spin_lock_irq(&dev->dev_status_lock);
839         ret = (dev->dev_status & TRANSPORT_DEVICE_SHUTDOWN);
840         spin_unlock_irq(&dev->dev_status_lock);
841
842         return ret;
843 }
844
845 void se_dev_set_default_attribs(
846         struct se_device *dev,
847         struct se_dev_limits *dev_limits)
848 {
849         struct queue_limits *limits = &dev_limits->limits;
850
851         DEV_ATTRIB(dev)->emulate_dpo = DA_EMULATE_DPO;
852         DEV_ATTRIB(dev)->emulate_fua_write = DA_EMULATE_FUA_WRITE;
853         DEV_ATTRIB(dev)->emulate_fua_read = DA_EMULATE_FUA_READ;
854         DEV_ATTRIB(dev)->emulate_write_cache = DA_EMULATE_WRITE_CACHE;
855         DEV_ATTRIB(dev)->emulate_ua_intlck_ctrl = DA_EMULATE_UA_INTLLCK_CTRL;
856         DEV_ATTRIB(dev)->emulate_tas = DA_EMULATE_TAS;
857         DEV_ATTRIB(dev)->emulate_tpu = DA_EMULATE_TPU;
858         DEV_ATTRIB(dev)->emulate_tpws = DA_EMULATE_TPWS;
859         DEV_ATTRIB(dev)->emulate_reservations = DA_EMULATE_RESERVATIONS;
860         DEV_ATTRIB(dev)->emulate_alua = DA_EMULATE_ALUA;
861         DEV_ATTRIB(dev)->enforce_pr_isids = DA_ENFORCE_PR_ISIDS;
862         /*
863          * The TPU=1 and TPWS=1 settings will be set in TCM/IBLOCK
864          * iblock_create_virtdevice() from struct queue_limits values
865          * if blk_queue_discard()==1
866          */
867         DEV_ATTRIB(dev)->max_unmap_lba_count = DA_MAX_UNMAP_LBA_COUNT;
868         DEV_ATTRIB(dev)->max_unmap_block_desc_count =
869                                 DA_MAX_UNMAP_BLOCK_DESC_COUNT;
870         DEV_ATTRIB(dev)->unmap_granularity = DA_UNMAP_GRANULARITY_DEFAULT;
871         DEV_ATTRIB(dev)->unmap_granularity_alignment =
872                                 DA_UNMAP_GRANULARITY_ALIGNMENT_DEFAULT;
873         /*
874          * block_size is based on subsystem plugin dependent requirements.
875          */
876         DEV_ATTRIB(dev)->hw_block_size = limits->logical_block_size;
877         DEV_ATTRIB(dev)->block_size = limits->logical_block_size;
878         /*
879          * max_sectors is based on subsystem plugin dependent requirements.
880          */
881         DEV_ATTRIB(dev)->hw_max_sectors = limits->max_hw_sectors;
882         DEV_ATTRIB(dev)->max_sectors = limits->max_sectors;
883         /*
884          * Set optimal_sectors from max_sectors, which can be lowered via
885          * configfs.
886          */
887         DEV_ATTRIB(dev)->optimal_sectors = limits->max_sectors;
888         /*
889          * queue_depth is based on subsystem plugin dependent requirements.
890          */
891         DEV_ATTRIB(dev)->hw_queue_depth = dev_limits->hw_queue_depth;
892         DEV_ATTRIB(dev)->queue_depth = dev_limits->queue_depth;
893 }
894
895 int se_dev_set_task_timeout(struct se_device *dev, u32 task_timeout)
896 {
897         if (task_timeout > DA_TASK_TIMEOUT_MAX) {
898                 printk(KERN_ERR "dev[%p]: Passed task_timeout: %u larger then"
899                         " DA_TASK_TIMEOUT_MAX\n", dev, task_timeout);
900                 return -1;
901         } else {
902                 DEV_ATTRIB(dev)->task_timeout = task_timeout;
903                 printk(KERN_INFO "dev[%p]: Set SE Device task_timeout: %u\n",
904                         dev, task_timeout);
905         }
906
907         return 0;
908 }
909
910 int se_dev_set_max_unmap_lba_count(
911         struct se_device *dev,
912         u32 max_unmap_lba_count)
913 {
914         DEV_ATTRIB(dev)->max_unmap_lba_count = max_unmap_lba_count;
915         printk(KERN_INFO "dev[%p]: Set max_unmap_lba_count: %u\n",
916                         dev, DEV_ATTRIB(dev)->max_unmap_lba_count);
917         return 0;
918 }
919
920 int se_dev_set_max_unmap_block_desc_count(
921         struct se_device *dev,
922         u32 max_unmap_block_desc_count)
923 {
924         DEV_ATTRIB(dev)->max_unmap_block_desc_count = max_unmap_block_desc_count;
925         printk(KERN_INFO "dev[%p]: Set max_unmap_block_desc_count: %u\n",
926                         dev, DEV_ATTRIB(dev)->max_unmap_block_desc_count);
927         return 0;
928 }
929
930 int se_dev_set_unmap_granularity(
931         struct se_device *dev,
932         u32 unmap_granularity)
933 {
934         DEV_ATTRIB(dev)->unmap_granularity = unmap_granularity;
935         printk(KERN_INFO "dev[%p]: Set unmap_granularity: %u\n",
936                         dev, DEV_ATTRIB(dev)->unmap_granularity);
937         return 0;
938 }
939
940 int se_dev_set_unmap_granularity_alignment(
941         struct se_device *dev,
942         u32 unmap_granularity_alignment)
943 {
944         DEV_ATTRIB(dev)->unmap_granularity_alignment = unmap_granularity_alignment;
945         printk(KERN_INFO "dev[%p]: Set unmap_granularity_alignment: %u\n",
946                         dev, DEV_ATTRIB(dev)->unmap_granularity_alignment);
947         return 0;
948 }
949
950 int se_dev_set_emulate_dpo(struct se_device *dev, int flag)
951 {
952         if ((flag != 0) && (flag != 1)) {
953                 printk(KERN_ERR "Illegal value %d\n", flag);
954                 return -1;
955         }
956         if (TRANSPORT(dev)->dpo_emulated == NULL) {
957                 printk(KERN_ERR "TRANSPORT(dev)->dpo_emulated is NULL\n");
958                 return -1;
959         }
960         if (TRANSPORT(dev)->dpo_emulated(dev) == 0) {
961                 printk(KERN_ERR "TRANSPORT(dev)->dpo_emulated not supported\n");
962                 return -1;
963         }
964         DEV_ATTRIB(dev)->emulate_dpo = flag;
965         printk(KERN_INFO "dev[%p]: SE Device Page Out (DPO) Emulation"
966                         " bit: %d\n", dev, DEV_ATTRIB(dev)->emulate_dpo);
967         return 0;
968 }
969
970 int se_dev_set_emulate_fua_write(struct se_device *dev, int flag)
971 {
972         if ((flag != 0) && (flag != 1)) {
973                 printk(KERN_ERR "Illegal value %d\n", flag);
974                 return -1;
975         }
976         if (TRANSPORT(dev)->fua_write_emulated == NULL) {
977                 printk(KERN_ERR "TRANSPORT(dev)->fua_write_emulated is NULL\n");
978                 return -1;
979         }
980         if (TRANSPORT(dev)->fua_write_emulated(dev) == 0) {
981                 printk(KERN_ERR "TRANSPORT(dev)->fua_write_emulated not supported\n");
982                 return -1;
983         }
984         DEV_ATTRIB(dev)->emulate_fua_write = flag;
985         printk(KERN_INFO "dev[%p]: SE Device Forced Unit Access WRITEs: %d\n",
986                         dev, DEV_ATTRIB(dev)->emulate_fua_write);
987         return 0;
988 }
989
990 int se_dev_set_emulate_fua_read(struct se_device *dev, int flag)
991 {
992         if ((flag != 0) && (flag != 1)) {
993                 printk(KERN_ERR "Illegal value %d\n", flag);
994                 return -1;
995         }
996         if (TRANSPORT(dev)->fua_read_emulated == NULL) {
997                 printk(KERN_ERR "TRANSPORT(dev)->fua_read_emulated is NULL\n");
998                 return -1;
999         }
1000         if (TRANSPORT(dev)->fua_read_emulated(dev) == 0) {
1001                 printk(KERN_ERR "TRANSPORT(dev)->fua_read_emulated not supported\n");
1002                 return -1;
1003         }
1004         DEV_ATTRIB(dev)->emulate_fua_read = flag;
1005         printk(KERN_INFO "dev[%p]: SE Device Forced Unit Access READs: %d\n",
1006                         dev, DEV_ATTRIB(dev)->emulate_fua_read);
1007         return 0;
1008 }
1009
1010 int se_dev_set_emulate_write_cache(struct se_device *dev, int flag)
1011 {
1012         if ((flag != 0) && (flag != 1)) {
1013                 printk(KERN_ERR "Illegal value %d\n", flag);
1014                 return -1;
1015         }
1016         if (TRANSPORT(dev)->write_cache_emulated == NULL) {
1017                 printk(KERN_ERR "TRANSPORT(dev)->write_cache_emulated is NULL\n");
1018                 return -1;
1019         }
1020         if (TRANSPORT(dev)->write_cache_emulated(dev) == 0) {
1021                 printk(KERN_ERR "TRANSPORT(dev)->write_cache_emulated not supported\n");
1022                 return -1;
1023         }
1024         DEV_ATTRIB(dev)->emulate_write_cache = flag;
1025         printk(KERN_INFO "dev[%p]: SE Device WRITE_CACHE_EMULATION flag: %d\n",
1026                         dev, DEV_ATTRIB(dev)->emulate_write_cache);
1027         return 0;
1028 }
1029
1030 int se_dev_set_emulate_ua_intlck_ctrl(struct se_device *dev, int flag)
1031 {
1032         if ((flag != 0) && (flag != 1) && (flag != 2)) {
1033                 printk(KERN_ERR "Illegal value %d\n", flag);
1034                 return -1;
1035         }
1036
1037         if (atomic_read(&dev->dev_export_obj.obj_access_count)) {
1038                 printk(KERN_ERR "dev[%p]: Unable to change SE Device"
1039                         " UA_INTRLCK_CTRL while dev_export_obj: %d count"
1040                         " exists\n", dev,
1041                         atomic_read(&dev->dev_export_obj.obj_access_count));
1042                 return -1;
1043         }
1044         DEV_ATTRIB(dev)->emulate_ua_intlck_ctrl = flag;
1045         printk(KERN_INFO "dev[%p]: SE Device UA_INTRLCK_CTRL flag: %d\n",
1046                 dev, DEV_ATTRIB(dev)->emulate_ua_intlck_ctrl);
1047
1048         return 0;
1049 }
1050
1051 int se_dev_set_emulate_tas(struct se_device *dev, int flag)
1052 {
1053         if ((flag != 0) && (flag != 1)) {
1054                 printk(KERN_ERR "Illegal value %d\n", flag);
1055                 return -1;
1056         }
1057
1058         if (atomic_read(&dev->dev_export_obj.obj_access_count)) {
1059                 printk(KERN_ERR "dev[%p]: Unable to change SE Device TAS while"
1060                         " dev_export_obj: %d count exists\n", dev,
1061                         atomic_read(&dev->dev_export_obj.obj_access_count));
1062                 return -1;
1063         }
1064         DEV_ATTRIB(dev)->emulate_tas = flag;
1065         printk(KERN_INFO "dev[%p]: SE Device TASK_ABORTED status bit: %s\n",
1066                 dev, (DEV_ATTRIB(dev)->emulate_tas) ? "Enabled" : "Disabled");
1067
1068         return 0;
1069 }
1070
1071 int se_dev_set_emulate_tpu(struct se_device *dev, int flag)
1072 {
1073         if ((flag != 0) && (flag != 1)) {
1074                 printk(KERN_ERR "Illegal value %d\n", flag);
1075                 return -1;
1076         }
1077         /*
1078          * We expect this value to be non-zero when generic Block Layer
1079          * Discard supported is detected iblock_create_virtdevice().
1080          */
1081         if (!(DEV_ATTRIB(dev)->max_unmap_block_desc_count)) {
1082                 printk(KERN_ERR "Generic Block Discard not supported\n");
1083                 return -ENOSYS;
1084         }
1085
1086         DEV_ATTRIB(dev)->emulate_tpu = flag;
1087         printk(KERN_INFO "dev[%p]: SE Device Thin Provisioning UNMAP bit: %d\n",
1088                                 dev, flag);
1089         return 0;
1090 }
1091
1092 int se_dev_set_emulate_tpws(struct se_device *dev, int flag)
1093 {
1094         if ((flag != 0) && (flag != 1)) {
1095                 printk(KERN_ERR "Illegal value %d\n", flag);
1096                 return -1;
1097         }
1098         /*
1099          * We expect this value to be non-zero when generic Block Layer
1100          * Discard supported is detected iblock_create_virtdevice().
1101          */
1102         if (!(DEV_ATTRIB(dev)->max_unmap_block_desc_count)) {
1103                 printk(KERN_ERR "Generic Block Discard not supported\n");
1104                 return -ENOSYS;
1105         }
1106
1107         DEV_ATTRIB(dev)->emulate_tpws = flag;
1108         printk(KERN_INFO "dev[%p]: SE Device Thin Provisioning WRITE_SAME: %d\n",
1109                                 dev, flag);
1110         return 0;
1111 }
1112
1113 int se_dev_set_enforce_pr_isids(struct se_device *dev, int flag)
1114 {
1115         if ((flag != 0) && (flag != 1)) {
1116                 printk(KERN_ERR "Illegal value %d\n", flag);
1117                 return -1;
1118         }
1119         DEV_ATTRIB(dev)->enforce_pr_isids = flag;
1120         printk(KERN_INFO "dev[%p]: SE Device enforce_pr_isids bit: %s\n", dev,
1121                 (DEV_ATTRIB(dev)->enforce_pr_isids) ? "Enabled" : "Disabled");
1122         return 0;
1123 }
1124
1125 /*
1126  * Note, this can only be called on unexported SE Device Object.
1127  */
1128 int se_dev_set_queue_depth(struct se_device *dev, u32 queue_depth)
1129 {
1130         u32 orig_queue_depth = dev->queue_depth;
1131
1132         if (atomic_read(&dev->dev_export_obj.obj_access_count)) {
1133                 printk(KERN_ERR "dev[%p]: Unable to change SE Device TCQ while"
1134                         " dev_export_obj: %d count exists\n", dev,
1135                         atomic_read(&dev->dev_export_obj.obj_access_count));
1136                 return -1;
1137         }
1138         if (!(queue_depth)) {
1139                 printk(KERN_ERR "dev[%p]: Illegal ZERO value for queue"
1140                         "_depth\n", dev);
1141                 return -1;
1142         }
1143
1144         if (TRANSPORT(dev)->transport_type == TRANSPORT_PLUGIN_PHBA_PDEV) {
1145                 if (queue_depth > DEV_ATTRIB(dev)->hw_queue_depth) {
1146                         printk(KERN_ERR "dev[%p]: Passed queue_depth: %u"
1147                                 " exceeds TCM/SE_Device TCQ: %u\n",
1148                                 dev, queue_depth,
1149                                 DEV_ATTRIB(dev)->hw_queue_depth);
1150                         return -1;
1151                 }
1152         } else {
1153                 if (queue_depth > DEV_ATTRIB(dev)->queue_depth) {
1154                         if (queue_depth > DEV_ATTRIB(dev)->hw_queue_depth) {
1155                                 printk(KERN_ERR "dev[%p]: Passed queue_depth:"
1156                                         " %u exceeds TCM/SE_Device MAX"
1157                                         " TCQ: %u\n", dev, queue_depth,
1158                                         DEV_ATTRIB(dev)->hw_queue_depth);
1159                                 return -1;
1160                         }
1161                 }
1162         }
1163
1164         DEV_ATTRIB(dev)->queue_depth = dev->queue_depth = queue_depth;
1165         if (queue_depth > orig_queue_depth)
1166                 atomic_add(queue_depth - orig_queue_depth, &dev->depth_left);
1167         else if (queue_depth < orig_queue_depth)
1168                 atomic_sub(orig_queue_depth - queue_depth, &dev->depth_left);
1169
1170         printk(KERN_INFO "dev[%p]: SE Device TCQ Depth changed to: %u\n",
1171                         dev, queue_depth);
1172         return 0;
1173 }
1174
1175 int se_dev_set_max_sectors(struct se_device *dev, u32 max_sectors)
1176 {
1177         int force = 0; /* Force setting for VDEVS */
1178
1179         if (atomic_read(&dev->dev_export_obj.obj_access_count)) {
1180                 printk(KERN_ERR "dev[%p]: Unable to change SE Device"
1181                         " max_sectors while dev_export_obj: %d count exists\n",
1182                         dev, atomic_read(&dev->dev_export_obj.obj_access_count));
1183                 return -1;
1184         }
1185         if (!(max_sectors)) {
1186                 printk(KERN_ERR "dev[%p]: Illegal ZERO value for"
1187                         " max_sectors\n", dev);
1188                 return -1;
1189         }
1190         if (max_sectors < DA_STATUS_MAX_SECTORS_MIN) {
1191                 printk(KERN_ERR "dev[%p]: Passed max_sectors: %u less than"
1192                         " DA_STATUS_MAX_SECTORS_MIN: %u\n", dev, max_sectors,
1193                                 DA_STATUS_MAX_SECTORS_MIN);
1194                 return -1;
1195         }
1196         if (TRANSPORT(dev)->transport_type == TRANSPORT_PLUGIN_PHBA_PDEV) {
1197                 if (max_sectors > DEV_ATTRIB(dev)->hw_max_sectors) {
1198                         printk(KERN_ERR "dev[%p]: Passed max_sectors: %u"
1199                                 " greater than TCM/SE_Device max_sectors:"
1200                                 " %u\n", dev, max_sectors,
1201                                 DEV_ATTRIB(dev)->hw_max_sectors);
1202                          return -1;
1203                 }
1204         } else {
1205                 if (!(force) && (max_sectors >
1206                                  DEV_ATTRIB(dev)->hw_max_sectors)) {
1207                         printk(KERN_ERR "dev[%p]: Passed max_sectors: %u"
1208                                 " greater than TCM/SE_Device max_sectors"
1209                                 ": %u, use force=1 to override.\n", dev,
1210                                 max_sectors, DEV_ATTRIB(dev)->hw_max_sectors);
1211                         return -1;
1212                 }
1213                 if (max_sectors > DA_STATUS_MAX_SECTORS_MAX) {
1214                         printk(KERN_ERR "dev[%p]: Passed max_sectors: %u"
1215                                 " greater than DA_STATUS_MAX_SECTORS_MAX:"
1216                                 " %u\n", dev, max_sectors,
1217                                 DA_STATUS_MAX_SECTORS_MAX);
1218                         return -1;
1219                 }
1220         }
1221
1222         DEV_ATTRIB(dev)->max_sectors = max_sectors;
1223         printk("dev[%p]: SE Device max_sectors changed to %u\n",
1224                         dev, max_sectors);
1225         return 0;
1226 }
1227
1228 int se_dev_set_optimal_sectors(struct se_device *dev, u32 optimal_sectors)
1229 {
1230         if (atomic_read(&dev->dev_export_obj.obj_access_count)) {
1231                 printk(KERN_ERR "dev[%p]: Unable to change SE Device"
1232                         " optimal_sectors while dev_export_obj: %d count exists\n",
1233                         dev, atomic_read(&dev->dev_export_obj.obj_access_count));
1234                 return -EINVAL;
1235         }
1236         if (TRANSPORT(dev)->transport_type == TRANSPORT_PLUGIN_PHBA_PDEV) {
1237                 printk(KERN_ERR "dev[%p]: Passed optimal_sectors cannot be"
1238                                 " changed for TCM/pSCSI\n", dev);
1239                 return -EINVAL;
1240         }
1241         if (optimal_sectors > DEV_ATTRIB(dev)->max_sectors) {
1242                 printk(KERN_ERR "dev[%p]: Passed optimal_sectors %u cannot be"
1243                         " greater than max_sectors: %u\n", dev,
1244                         optimal_sectors, DEV_ATTRIB(dev)->max_sectors);
1245                 return -EINVAL;
1246         }
1247
1248         DEV_ATTRIB(dev)->optimal_sectors = optimal_sectors;
1249         printk(KERN_INFO "dev[%p]: SE Device optimal_sectors changed to %u\n",
1250                         dev, optimal_sectors);
1251         return 0;
1252 }
1253
1254 int se_dev_set_block_size(struct se_device *dev, u32 block_size)
1255 {
1256         if (atomic_read(&dev->dev_export_obj.obj_access_count)) {
1257                 printk(KERN_ERR "dev[%p]: Unable to change SE Device block_size"
1258                         " while dev_export_obj: %d count exists\n", dev,
1259                         atomic_read(&dev->dev_export_obj.obj_access_count));
1260                 return -1;
1261         }
1262
1263         if ((block_size != 512) &&
1264             (block_size != 1024) &&
1265             (block_size != 2048) &&
1266             (block_size != 4096)) {
1267                 printk(KERN_ERR "dev[%p]: Illegal value for block_device: %u"
1268                         " for SE device, must be 512, 1024, 2048 or 4096\n",
1269                         dev, block_size);
1270                 return -1;
1271         }
1272
1273         if (TRANSPORT(dev)->transport_type == TRANSPORT_PLUGIN_PHBA_PDEV) {
1274                 printk(KERN_ERR "dev[%p]: Not allowed to change block_size for"
1275                         " Physical Device, use for Linux/SCSI to change"
1276                         " block_size for underlying hardware\n", dev);
1277                 return -1;
1278         }
1279
1280         DEV_ATTRIB(dev)->block_size = block_size;
1281         printk(KERN_INFO "dev[%p]: SE Device block_size changed to %u\n",
1282                         dev, block_size);
1283         return 0;
1284 }
1285
1286 struct se_lun *core_dev_add_lun(
1287         struct se_portal_group *tpg,
1288         struct se_hba *hba,
1289         struct se_device *dev,
1290         u32 lun)
1291 {
1292         struct se_lun *lun_p;
1293         u32 lun_access = 0;
1294
1295         if (atomic_read(&dev->dev_access_obj.obj_access_count) != 0) {
1296                 printk(KERN_ERR "Unable to export struct se_device while dev_access_obj: %d\n",
1297                         atomic_read(&dev->dev_access_obj.obj_access_count));
1298                 return NULL;
1299         }
1300
1301         lun_p = core_tpg_pre_addlun(tpg, lun);
1302         if ((IS_ERR(lun_p)) || !(lun_p))
1303                 return NULL;
1304
1305         if (dev->dev_flags & DF_READ_ONLY)
1306                 lun_access = TRANSPORT_LUNFLAGS_READ_ONLY;
1307         else
1308                 lun_access = TRANSPORT_LUNFLAGS_READ_WRITE;
1309
1310         if (core_tpg_post_addlun(tpg, lun_p, lun_access, dev) < 0)
1311                 return NULL;
1312
1313         printk(KERN_INFO "%s_TPG[%u]_LUN[%u] - Activated %s Logical Unit from"
1314                 " CORE HBA: %u\n", TPG_TFO(tpg)->get_fabric_name(),
1315                 TPG_TFO(tpg)->tpg_get_tag(tpg), lun_p->unpacked_lun,
1316                 TPG_TFO(tpg)->get_fabric_name(), hba->hba_id);
1317         /*
1318          * Update LUN maps for dynamically added initiators when
1319          * generate_node_acl is enabled.
1320          */
1321         if (TPG_TFO(tpg)->tpg_check_demo_mode(tpg)) {
1322                 struct se_node_acl *acl;
1323                 spin_lock_bh(&tpg->acl_node_lock);
1324                 list_for_each_entry(acl, &tpg->acl_node_list, acl_list) {
1325                         if (acl->dynamic_node_acl) {
1326                                 spin_unlock_bh(&tpg->acl_node_lock);
1327                                 core_tpg_add_node_to_devs(acl, tpg);
1328                                 spin_lock_bh(&tpg->acl_node_lock);
1329                         }
1330                 }
1331                 spin_unlock_bh(&tpg->acl_node_lock);
1332         }
1333
1334         return lun_p;
1335 }
1336
1337 /*      core_dev_del_lun():
1338  *
1339  *
1340  */
1341 int core_dev_del_lun(
1342         struct se_portal_group *tpg,
1343         u32 unpacked_lun)
1344 {
1345         struct se_lun *lun;
1346         int ret = 0;
1347
1348         lun = core_tpg_pre_dellun(tpg, unpacked_lun, &ret);
1349         if (!(lun))
1350                 return ret;
1351
1352         core_tpg_post_dellun(tpg, lun);
1353
1354         printk(KERN_INFO "%s_TPG[%u]_LUN[%u] - Deactivated %s Logical Unit from"
1355                 " device object\n", TPG_TFO(tpg)->get_fabric_name(),
1356                 TPG_TFO(tpg)->tpg_get_tag(tpg), unpacked_lun,
1357                 TPG_TFO(tpg)->get_fabric_name());
1358
1359         return 0;
1360 }
1361
1362 struct se_lun *core_get_lun_from_tpg(struct se_portal_group *tpg, u32 unpacked_lun)
1363 {
1364         struct se_lun *lun;
1365
1366         spin_lock(&tpg->tpg_lun_lock);
1367         if (unpacked_lun > (TRANSPORT_MAX_LUNS_PER_TPG-1)) {
1368                 printk(KERN_ERR "%s LUN: %u exceeds TRANSPORT_MAX_LUNS"
1369                         "_PER_TPG-1: %u for Target Portal Group: %hu\n",
1370                         TPG_TFO(tpg)->get_fabric_name(), unpacked_lun,
1371                         TRANSPORT_MAX_LUNS_PER_TPG-1,
1372                         TPG_TFO(tpg)->tpg_get_tag(tpg));
1373                 spin_unlock(&tpg->tpg_lun_lock);
1374                 return NULL;
1375         }
1376         lun = &tpg->tpg_lun_list[unpacked_lun];
1377
1378         if (lun->lun_status != TRANSPORT_LUN_STATUS_FREE) {
1379                 printk(KERN_ERR "%s Logical Unit Number: %u is not free on"
1380                         " Target Portal Group: %hu, ignoring request.\n",
1381                         TPG_TFO(tpg)->get_fabric_name(), unpacked_lun,
1382                         TPG_TFO(tpg)->tpg_get_tag(tpg));
1383                 spin_unlock(&tpg->tpg_lun_lock);
1384                 return NULL;
1385         }
1386         spin_unlock(&tpg->tpg_lun_lock);
1387
1388         return lun;
1389 }
1390
1391 /*      core_dev_get_lun():
1392  *
1393  *
1394  */
1395 static struct se_lun *core_dev_get_lun(struct se_portal_group *tpg, u32 unpacked_lun)
1396 {
1397         struct se_lun *lun;
1398
1399         spin_lock(&tpg->tpg_lun_lock);
1400         if (unpacked_lun > (TRANSPORT_MAX_LUNS_PER_TPG-1)) {
1401                 printk(KERN_ERR "%s LUN: %u exceeds TRANSPORT_MAX_LUNS_PER"
1402                         "_TPG-1: %u for Target Portal Group: %hu\n",
1403                         TPG_TFO(tpg)->get_fabric_name(), unpacked_lun,
1404                         TRANSPORT_MAX_LUNS_PER_TPG-1,
1405                         TPG_TFO(tpg)->tpg_get_tag(tpg));
1406                 spin_unlock(&tpg->tpg_lun_lock);
1407                 return NULL;
1408         }
1409         lun = &tpg->tpg_lun_list[unpacked_lun];
1410
1411         if (lun->lun_status != TRANSPORT_LUN_STATUS_ACTIVE) {
1412                 printk(KERN_ERR "%s Logical Unit Number: %u is not active on"
1413                         " Target Portal Group: %hu, ignoring request.\n",
1414                         TPG_TFO(tpg)->get_fabric_name(), unpacked_lun,
1415                         TPG_TFO(tpg)->tpg_get_tag(tpg));
1416                 spin_unlock(&tpg->tpg_lun_lock);
1417                 return NULL;
1418         }
1419         spin_unlock(&tpg->tpg_lun_lock);
1420
1421         return lun;
1422 }
1423
1424 struct se_lun_acl *core_dev_init_initiator_node_lun_acl(
1425         struct se_portal_group *tpg,
1426         u32 mapped_lun,
1427         char *initiatorname,
1428         int *ret)
1429 {
1430         struct se_lun_acl *lacl;
1431         struct se_node_acl *nacl;
1432
1433         if (strlen(initiatorname) > TRANSPORT_IQN_LEN) {
1434                 printk(KERN_ERR "%s InitiatorName exceeds maximum size.\n",
1435                         TPG_TFO(tpg)->get_fabric_name());
1436                 *ret = -EOVERFLOW;
1437                 return NULL;
1438         }
1439         nacl = core_tpg_get_initiator_node_acl(tpg, initiatorname);
1440         if (!(nacl)) {
1441                 *ret = -EINVAL;
1442                 return NULL;
1443         }
1444         lacl = kzalloc(sizeof(struct se_lun_acl), GFP_KERNEL);
1445         if (!(lacl)) {
1446                 printk(KERN_ERR "Unable to allocate memory for struct se_lun_acl.\n");
1447                 *ret = -ENOMEM;
1448                 return NULL;
1449         }
1450
1451         INIT_LIST_HEAD(&lacl->lacl_list);
1452         lacl->mapped_lun = mapped_lun;
1453         lacl->se_lun_nacl = nacl;
1454         snprintf(lacl->initiatorname, TRANSPORT_IQN_LEN, "%s", initiatorname);
1455
1456         return lacl;
1457 }
1458
1459 int core_dev_add_initiator_node_lun_acl(
1460         struct se_portal_group *tpg,
1461         struct se_lun_acl *lacl,
1462         u32 unpacked_lun,
1463         u32 lun_access)
1464 {
1465         struct se_lun *lun;
1466         struct se_node_acl *nacl;
1467
1468         lun = core_dev_get_lun(tpg, unpacked_lun);
1469         if (!(lun)) {
1470                 printk(KERN_ERR "%s Logical Unit Number: %u is not active on"
1471                         " Target Portal Group: %hu, ignoring request.\n",
1472                         TPG_TFO(tpg)->get_fabric_name(), unpacked_lun,
1473                         TPG_TFO(tpg)->tpg_get_tag(tpg));
1474                 return -EINVAL;
1475         }
1476
1477         nacl = lacl->se_lun_nacl;
1478         if (!(nacl))
1479                 return -EINVAL;
1480
1481         if ((lun->lun_access & TRANSPORT_LUNFLAGS_READ_ONLY) &&
1482             (lun_access & TRANSPORT_LUNFLAGS_READ_WRITE))
1483                 lun_access = TRANSPORT_LUNFLAGS_READ_ONLY;
1484
1485         lacl->se_lun = lun;
1486
1487         if (core_update_device_list_for_node(lun, lacl, lacl->mapped_lun,
1488                         lun_access, nacl, tpg, 1) < 0)
1489                 return -EINVAL;
1490
1491         spin_lock(&lun->lun_acl_lock);
1492         list_add_tail(&lacl->lacl_list, &lun->lun_acl_list);
1493         atomic_inc(&lun->lun_acl_count);
1494         smp_mb__after_atomic_inc();
1495         spin_unlock(&lun->lun_acl_lock);
1496
1497         printk(KERN_INFO "%s_TPG[%hu]_LUN[%u->%u] - Added %s ACL for "
1498                 " InitiatorNode: %s\n", TPG_TFO(tpg)->get_fabric_name(),
1499                 TPG_TFO(tpg)->tpg_get_tag(tpg), unpacked_lun, lacl->mapped_lun,
1500                 (lun_access & TRANSPORT_LUNFLAGS_READ_WRITE) ? "RW" : "RO",
1501                 lacl->initiatorname);
1502         /*
1503          * Check to see if there are any existing persistent reservation APTPL
1504          * pre-registrations that need to be enabled for this LUN ACL..
1505          */
1506         core_scsi3_check_aptpl_registration(lun->lun_se_dev, tpg, lun, lacl);
1507         return 0;
1508 }
1509
1510 /*      core_dev_del_initiator_node_lun_acl():
1511  *
1512  *
1513  */
1514 int core_dev_del_initiator_node_lun_acl(
1515         struct se_portal_group *tpg,
1516         struct se_lun *lun,
1517         struct se_lun_acl *lacl)
1518 {
1519         struct se_node_acl *nacl;
1520
1521         nacl = lacl->se_lun_nacl;
1522         if (!(nacl))
1523                 return -EINVAL;
1524
1525         spin_lock(&lun->lun_acl_lock);
1526         list_del(&lacl->lacl_list);
1527         atomic_dec(&lun->lun_acl_count);
1528         smp_mb__after_atomic_dec();
1529         spin_unlock(&lun->lun_acl_lock);
1530
1531         core_update_device_list_for_node(lun, NULL, lacl->mapped_lun,
1532                 TRANSPORT_LUNFLAGS_NO_ACCESS, nacl, tpg, 0);
1533
1534         lacl->se_lun = NULL;
1535
1536         printk(KERN_INFO "%s_TPG[%hu]_LUN[%u] - Removed ACL for"
1537                 " InitiatorNode: %s Mapped LUN: %u\n",
1538                 TPG_TFO(tpg)->get_fabric_name(),
1539                 TPG_TFO(tpg)->tpg_get_tag(tpg), lun->unpacked_lun,
1540                 lacl->initiatorname, lacl->mapped_lun);
1541
1542         return 0;
1543 }
1544
1545 void core_dev_free_initiator_node_lun_acl(
1546         struct se_portal_group *tpg,
1547         struct se_lun_acl *lacl)
1548 {
1549         printk("%s_TPG[%hu] - Freeing ACL for %s InitiatorNode: %s"
1550                 " Mapped LUN: %u\n", TPG_TFO(tpg)->get_fabric_name(),
1551                 TPG_TFO(tpg)->tpg_get_tag(tpg),
1552                 TPG_TFO(tpg)->get_fabric_name(),
1553                 lacl->initiatorname, lacl->mapped_lun);
1554
1555         kfree(lacl);
1556 }
1557
1558 int core_dev_setup_virtual_lun0(void)
1559 {
1560         struct se_hba *hba;
1561         struct se_device *dev;
1562         struct se_subsystem_dev *se_dev = NULL;
1563         struct se_subsystem_api *t;
1564         char buf[16];
1565         int ret;
1566
1567         hba = core_alloc_hba("rd_dr", 0, HBA_FLAGS_INTERNAL_USE);
1568         if (IS_ERR(hba))
1569                 return PTR_ERR(hba);
1570
1571         se_global->g_lun0_hba = hba;
1572         t = hba->transport;
1573
1574         se_dev = kzalloc(sizeof(struct se_subsystem_dev), GFP_KERNEL);
1575         if (!(se_dev)) {
1576                 printk(KERN_ERR "Unable to allocate memory for"
1577                                 " struct se_subsystem_dev\n");
1578                 ret = -ENOMEM;
1579                 goto out;
1580         }
1581         INIT_LIST_HEAD(&se_dev->g_se_dev_list);
1582         INIT_LIST_HEAD(&se_dev->t10_wwn.t10_vpd_list);
1583         spin_lock_init(&se_dev->t10_wwn.t10_vpd_lock);
1584         INIT_LIST_HEAD(&se_dev->t10_reservation.registration_list);
1585         INIT_LIST_HEAD(&se_dev->t10_reservation.aptpl_reg_list);
1586         spin_lock_init(&se_dev->t10_reservation.registration_lock);
1587         spin_lock_init(&se_dev->t10_reservation.aptpl_reg_lock);
1588         INIT_LIST_HEAD(&se_dev->t10_alua.tg_pt_gps_list);
1589         spin_lock_init(&se_dev->t10_alua.tg_pt_gps_lock);
1590         spin_lock_init(&se_dev->se_dev_lock);
1591         se_dev->t10_reservation.pr_aptpl_buf_len = PR_APTPL_BUF_LEN;
1592         se_dev->t10_wwn.t10_sub_dev = se_dev;
1593         se_dev->t10_alua.t10_sub_dev = se_dev;
1594         se_dev->se_dev_attrib.da_sub_dev = se_dev;
1595         se_dev->se_dev_hba = hba;
1596
1597         se_dev->se_dev_su_ptr = t->allocate_virtdevice(hba, "virt_lun0");
1598         if (!(se_dev->se_dev_su_ptr)) {
1599                 printk(KERN_ERR "Unable to locate subsystem dependent pointer"
1600                         " from allocate_virtdevice()\n");
1601                 ret = -ENOMEM;
1602                 goto out;
1603         }
1604         se_global->g_lun0_su_dev = se_dev;
1605
1606         memset(buf, 0, 16);
1607         sprintf(buf, "rd_pages=8");
1608         t->set_configfs_dev_params(hba, se_dev, buf, sizeof(buf));
1609
1610         dev = t->create_virtdevice(hba, se_dev, se_dev->se_dev_su_ptr);
1611         if (!(dev) || IS_ERR(dev)) {
1612                 ret = -ENOMEM;
1613                 goto out;
1614         }
1615         se_dev->se_dev_ptr = dev;
1616         se_global->g_lun0_dev = dev;
1617
1618         return 0;
1619 out:
1620         se_global->g_lun0_su_dev = NULL;
1621         kfree(se_dev);
1622         if (se_global->g_lun0_hba) {
1623                 core_delete_hba(se_global->g_lun0_hba);
1624                 se_global->g_lun0_hba = NULL;
1625         }
1626         return ret;
1627 }
1628
1629
1630 void core_dev_release_virtual_lun0(void)
1631 {
1632         struct se_hba *hba = se_global->g_lun0_hba;
1633         struct se_subsystem_dev *su_dev = se_global->g_lun0_su_dev;
1634
1635         if (!(hba))
1636                 return;
1637
1638         if (se_global->g_lun0_dev)
1639                 se_free_virtual_device(se_global->g_lun0_dev, hba);
1640
1641         kfree(su_dev);
1642         core_delete_hba(hba);
1643 }