target: Use {get,put}_unaligned_be*() instead of open coding these functions
[linux-2.6-block.git] / drivers / target / target_core_pscsi.c
CommitLineData
c66ac9db
NB
1/*******************************************************************************
2 * Filename: target_core_pscsi.c
3 *
4 * This file contains the generic target mode <-> Linux SCSI subsystem plugin.
5 *
4c76251e 6 * (c) Copyright 2003-2013 Datera, Inc.
c66ac9db
NB
7 *
8 * Nicholas A. Bellinger <nab@kernel.org>
9 *
10 * This program is free software; you can redistribute it and/or modify
11 * it under the terms of the GNU General Public License as published by
12 * the Free Software Foundation; either version 2 of the License, or
13 * (at your option) any later version.
14 *
15 * This program is distributed in the hope that it will be useful,
16 * but WITHOUT ANY WARRANTY; without even the implied warranty of
17 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
18 * GNU General Public License for more details.
19 *
20 * You should have received a copy of the GNU General Public License
21 * along with this program; if not, write to the Free Software
22 * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
23 *
24 ******************************************************************************/
25
c66ac9db
NB
26#include <linux/string.h>
27#include <linux/parser.h>
28#include <linux/timer.h>
29#include <linux/blkdev.h>
30#include <linux/blk_types.h>
31#include <linux/slab.h>
32#include <linux/spinlock.h>
c66ac9db
NB
33#include <linux/genhd.h>
34#include <linux/cdrom.h>
d6e0175c 35#include <linux/ratelimit.h>
827509e3 36#include <linux/module.h>
d6e0175c
CH
37#include <asm/unaligned.h>
38
c66ac9db 39#include <scsi/scsi_device.h>
c66ac9db 40#include <scsi/scsi_host.h>
e66ecd50 41#include <scsi/scsi_tcq.h>
c66ac9db
NB
42
43#include <target/target_core_base.h>
c4795fb2 44#include <target/target_core_backend.h>
c66ac9db 45
d6e0175c 46#include "target_core_alua.h"
29a05dee 47#include "target_core_internal.h"
c66ac9db
NB
48#include "target_core_pscsi.h"
49
50#define ISPRINT(a) ((a >= ' ') && (a <= '~'))
51
0fd97ccf
CH
52static inline struct pscsi_dev_virt *PSCSI_DEV(struct se_device *dev)
53{
54 return container_of(dev, struct pscsi_dev_virt, dev);
55}
56
de103c93 57static sense_reason_t pscsi_execute_cmd(struct se_cmd *cmd);
c66ac9db
NB
58static void pscsi_req_done(struct request *, int);
59
c66ac9db
NB
60/* pscsi_attach_hba():
61 *
62 * pscsi_get_sh() used scsi_host_lookup() to locate struct Scsi_Host.
63 * from the passed SCSI Host ID.
64 */
65static int pscsi_attach_hba(struct se_hba *hba, u32 host_id)
66{
c66ac9db
NB
67 struct pscsi_hba_virt *phv;
68
69 phv = kzalloc(sizeof(struct pscsi_hba_virt), GFP_KERNEL);
6708bb27
AG
70 if (!phv) {
71 pr_err("Unable to allocate struct pscsi_hba_virt\n");
e3d6f909 72 return -ENOMEM;
c66ac9db
NB
73 }
74 phv->phv_host_id = host_id;
e6a8a41a 75 phv->phv_mode = PHV_VIRTUAL_HOST_ID;
c66ac9db 76
5951146d 77 hba->hba_ptr = phv;
c66ac9db 78
6708bb27 79 pr_debug("CORE_HBA[%d] - TCM SCSI HBA Driver %s on"
c66ac9db 80 " Generic Target Core Stack %s\n", hba->hba_id,
ce8dd25d 81 PSCSI_VERSION, TARGET_CORE_VERSION);
6708bb27 82 pr_debug("CORE_HBA[%d] - Attached SCSI HBA to Generic\n",
e3d6f909 83 hba->hba_id);
c66ac9db
NB
84
85 return 0;
86}
87
88static void pscsi_detach_hba(struct se_hba *hba)
89{
90 struct pscsi_hba_virt *phv = hba->hba_ptr;
91 struct Scsi_Host *scsi_host = phv->phv_lld_host;
92
93 if (scsi_host) {
94 scsi_host_put(scsi_host);
95
6708bb27 96 pr_debug("CORE_HBA[%d] - Detached SCSI HBA: %s from"
c66ac9db
NB
97 " Generic Target Core\n", hba->hba_id,
98 (scsi_host->hostt->name) ? (scsi_host->hostt->name) :
99 "Unknown");
100 } else
6708bb27 101 pr_debug("CORE_HBA[%d] - Detached Virtual SCSI HBA"
c66ac9db
NB
102 " from Generic Target Core\n", hba->hba_id);
103
104 kfree(phv);
105 hba->hba_ptr = NULL;
106}
107
108static int pscsi_pmode_enable_hba(struct se_hba *hba, unsigned long mode_flag)
109{
8359cf43 110 struct pscsi_hba_virt *phv = hba->hba_ptr;
c66ac9db 111 struct Scsi_Host *sh = phv->phv_lld_host;
c66ac9db
NB
112 /*
113 * Release the struct Scsi_Host
114 */
6708bb27
AG
115 if (!mode_flag) {
116 if (!sh)
c66ac9db
NB
117 return 0;
118
119 phv->phv_lld_host = NULL;
e6a8a41a 120 phv->phv_mode = PHV_VIRTUAL_HOST_ID;
c66ac9db 121
6708bb27 122 pr_debug("CORE_HBA[%d] - Disabled pSCSI HBA Passthrough"
c66ac9db
NB
123 " %s\n", hba->hba_id, (sh->hostt->name) ?
124 (sh->hostt->name) : "Unknown");
125
126 scsi_host_put(sh);
127 return 0;
128 }
129 /*
130 * Otherwise, locate struct Scsi_Host from the original passed
131 * pSCSI Host ID and enable for phba mode
132 */
e3d6f909 133 sh = scsi_host_lookup(phv->phv_host_id);
58932e96 134 if (!sh) {
6708bb27 135 pr_err("pSCSI: Unable to locate SCSI Host for"
c66ac9db 136 " phv_host_id: %d\n", phv->phv_host_id);
58932e96 137 return -EINVAL;
c66ac9db 138 }
c66ac9db
NB
139
140 phv->phv_lld_host = sh;
141 phv->phv_mode = PHV_LLD_SCSI_HOST_NO;
142
6708bb27 143 pr_debug("CORE_HBA[%d] - Enabled pSCSI HBA Passthrough %s\n",
c66ac9db
NB
144 hba->hba_id, (sh->hostt->name) ? (sh->hostt->name) : "Unknown");
145
146 return 1;
147}
148
149static void pscsi_tape_read_blocksize(struct se_device *dev,
150 struct scsi_device *sdev)
151{
152 unsigned char cdb[MAX_COMMAND_SIZE], *buf;
153 int ret;
154
155 buf = kzalloc(12, GFP_KERNEL);
156 if (!buf)
a04e54f2 157 goto out_free;
c66ac9db
NB
158
159 memset(cdb, 0, MAX_COMMAND_SIZE);
160 cdb[0] = MODE_SENSE;
161 cdb[4] = 0x0c; /* 12 bytes */
162
163 ret = scsi_execute_req(sdev, cdb, DMA_FROM_DEVICE, buf, 12, NULL,
164 HZ, 1, NULL);
165 if (ret)
166 goto out_free;
167
168 /*
169 * If MODE_SENSE still returns zero, set the default value to 1024.
170 */
a85d667e 171 sdev->sector_size = get_unaligned_be24(&buf[9]);
a04e54f2 172out_free:
c66ac9db
NB
173 if (!sdev->sector_size)
174 sdev->sector_size = 1024;
a04e54f2 175
c66ac9db
NB
176 kfree(buf);
177}
178
179static void
180pscsi_set_inquiry_info(struct scsi_device *sdev, struct t10_wwn *wwn)
181{
182 unsigned char *buf;
183
184 if (sdev->inquiry_len < INQUIRY_LEN)
185 return;
186
187 buf = sdev->inquiry;
188 if (!buf)
189 return;
190 /*
191 * Use sdev->inquiry from drivers/scsi/scsi_scan.c:scsi_alloc_sdev()
192 */
193 memcpy(&wwn->vendor[0], &buf[8], sizeof(wwn->vendor));
194 memcpy(&wwn->model[0], &buf[16], sizeof(wwn->model));
195 memcpy(&wwn->revision[0], &buf[32], sizeof(wwn->revision));
196}
197
198static int
199pscsi_get_inquiry_vpd_serial(struct scsi_device *sdev, struct t10_wwn *wwn)
200{
201 unsigned char cdb[MAX_COMMAND_SIZE], *buf;
202 int ret;
203
204 buf = kzalloc(INQUIRY_VPD_SERIAL_LEN, GFP_KERNEL);
205 if (!buf)
e3d6f909 206 return -ENOMEM;
c66ac9db
NB
207
208 memset(cdb, 0, MAX_COMMAND_SIZE);
209 cdb[0] = INQUIRY;
210 cdb[1] = 0x01; /* Query VPD */
211 cdb[2] = 0x80; /* Unit Serial Number */
a85d667e 212 put_unaligned_be16(INQUIRY_VPD_SERIAL_LEN, &cdb[3]);
c66ac9db
NB
213
214 ret = scsi_execute_req(sdev, cdb, DMA_FROM_DEVICE, buf,
215 INQUIRY_VPD_SERIAL_LEN, NULL, HZ, 1, NULL);
216 if (ret)
217 goto out_free;
218
219 snprintf(&wwn->unit_serial[0], INQUIRY_VPD_SERIAL_LEN, "%s", &buf[4]);
220
0fd97ccf 221 wwn->t10_dev->dev_flags |= DF_FIRMWARE_VPD_UNIT_SERIAL;
c66ac9db
NB
222
223 kfree(buf);
224 return 0;
225
226out_free:
227 kfree(buf);
e3d6f909 228 return -EPERM;
c66ac9db
NB
229}
230
231static void
232pscsi_get_inquiry_vpd_device_ident(struct scsi_device *sdev,
233 struct t10_wwn *wwn)
234{
235 unsigned char cdb[MAX_COMMAND_SIZE], *buf, *page_83;
236 int ident_len, page_len, off = 4, ret;
237 struct t10_vpd *vpd;
238
239 buf = kzalloc(INQUIRY_VPD_SERIAL_LEN, GFP_KERNEL);
240 if (!buf)
241 return;
242
243 memset(cdb, 0, MAX_COMMAND_SIZE);
244 cdb[0] = INQUIRY;
245 cdb[1] = 0x01; /* Query VPD */
246 cdb[2] = 0x83; /* Device Identifier */
a85d667e 247 put_unaligned_be16(INQUIRY_VPD_DEVICE_IDENTIFIER_LEN, &cdb[3]);
c66ac9db
NB
248
249 ret = scsi_execute_req(sdev, cdb, DMA_FROM_DEVICE, buf,
250 INQUIRY_VPD_DEVICE_IDENTIFIER_LEN,
251 NULL, HZ, 1, NULL);
252 if (ret)
253 goto out;
254
a85d667e 255 page_len = get_unaligned_be16(&buf[2]);
c66ac9db
NB
256 while (page_len > 0) {
257 /* Grab a pointer to the Identification descriptor */
258 page_83 = &buf[off];
259 ident_len = page_83[3];
260 if (!ident_len) {
6708bb27 261 pr_err("page_83[3]: identifier"
c66ac9db
NB
262 " length zero!\n");
263 break;
264 }
35d1efe8 265 pr_debug("T10 VPD Identifier Length: %d\n", ident_len);
c66ac9db
NB
266
267 vpd = kzalloc(sizeof(struct t10_vpd), GFP_KERNEL);
268 if (!vpd) {
6708bb27 269 pr_err("Unable to allocate memory for"
c66ac9db
NB
270 " struct t10_vpd\n");
271 goto out;
272 }
273 INIT_LIST_HEAD(&vpd->vpd_list);
274
275 transport_set_vpd_proto_id(vpd, page_83);
276 transport_set_vpd_assoc(vpd, page_83);
277
278 if (transport_set_vpd_ident_type(vpd, page_83) < 0) {
279 off += (ident_len + 4);
280 page_len -= (ident_len + 4);
281 kfree(vpd);
282 continue;
283 }
284 if (transport_set_vpd_ident(vpd, page_83) < 0) {
285 off += (ident_len + 4);
286 page_len -= (ident_len + 4);
287 kfree(vpd);
288 continue;
289 }
290
291 list_add_tail(&vpd->vpd_list, &wwn->t10_vpd_list);
292 off += (ident_len + 4);
293 page_len -= (ident_len + 4);
294 }
295
296out:
297 kfree(buf);
298}
299
0fd97ccf
CH
300static int pscsi_add_device_to_list(struct se_device *dev,
301 struct scsi_device *sd)
c66ac9db 302{
0fd97ccf
CH
303 struct pscsi_dev_virt *pdv = PSCSI_DEV(dev);
304 struct request_queue *q = sd->request_queue;
c66ac9db 305
0fd97ccf 306 pdv->pdv_sd = sd;
c66ac9db
NB
307
308 if (!sd->queue_depth) {
309 sd->queue_depth = PSCSI_DEFAULT_QUEUEDEPTH;
310
9cb78c16 311 pr_err("Set broken SCSI Device %d:%d:%llu"
c66ac9db
NB
312 " queue_depth to %d\n", sd->channel, sd->id,
313 sd->lun, sd->queue_depth);
314 }
0fd97ccf 315
a04e54f2
NB
316 dev->dev_attrib.hw_block_size =
317 min_not_zero((int)sd->sector_size, 512);
0fd97ccf 318 dev->dev_attrib.hw_max_sectors =
a04e54f2 319 min_not_zero(sd->host->max_sectors, queue_max_hw_sectors(q));
0fd97ccf
CH
320 dev->dev_attrib.hw_queue_depth = sd->queue_depth;
321
c66ac9db
NB
322 /*
323 * Setup our standard INQUIRY info into se_dev->t10_wwn
324 */
0fd97ccf 325 pscsi_set_inquiry_info(sd, &dev->t10_wwn);
c66ac9db
NB
326
327 /*
328 * Locate VPD WWN Information used for various purposes within
329 * the Storage Engine.
330 */
0fd97ccf 331 if (!pscsi_get_inquiry_vpd_serial(sd, &dev->t10_wwn)) {
c66ac9db
NB
332 /*
333 * If VPD Unit Serial returned GOOD status, try
334 * VPD Device Identification page (0x83).
335 */
0fd97ccf 336 pscsi_get_inquiry_vpd_device_ident(sd, &dev->t10_wwn);
c66ac9db
NB
337 }
338
339 /*
340 * For TYPE_TAPE, attempt to determine blocksize with MODE_SENSE.
341 */
a04e54f2 342 if (sd->type == TYPE_TAPE) {
c66ac9db 343 pscsi_tape_read_blocksize(dev, sd);
a04e54f2
NB
344 dev->dev_attrib.hw_block_size = sd->sector_size;
345 }
0fd97ccf 346 return 0;
c66ac9db
NB
347}
348
0fd97ccf
CH
349static struct se_device *pscsi_alloc_device(struct se_hba *hba,
350 const char *name)
c66ac9db
NB
351{
352 struct pscsi_dev_virt *pdv;
353
354 pdv = kzalloc(sizeof(struct pscsi_dev_virt), GFP_KERNEL);
6708bb27
AG
355 if (!pdv) {
356 pr_err("Unable to allocate memory for struct pscsi_dev_virt\n");
c66ac9db
NB
357 return NULL;
358 }
c66ac9db 359
6708bb27 360 pr_debug("PSCSI: Allocated pdv: %p for %s\n", pdv, name);
0fd97ccf 361 return &pdv->dev;
c66ac9db
NB
362}
363
364/*
365 * Called with struct Scsi_Host->host_lock called.
366 */
0fd97ccf 367static int pscsi_create_type_disk(struct se_device *dev, struct scsi_device *sd)
5dd7ed2e 368 __releases(sh->host_lock)
c66ac9db 369{
0fd97ccf
CH
370 struct pscsi_hba_virt *phv = dev->se_hba->hba_ptr;
371 struct pscsi_dev_virt *pdv = PSCSI_DEV(dev);
c66ac9db
NB
372 struct Scsi_Host *sh = sd->host;
373 struct block_device *bd;
0fd97ccf 374 int ret;
c66ac9db
NB
375
376 if (scsi_device_get(sd)) {
9cb78c16 377 pr_err("scsi_device_get() failed for %d:%d:%d:%llu\n",
c66ac9db
NB
378 sh->host_no, sd->channel, sd->id, sd->lun);
379 spin_unlock_irq(sh->host_lock);
0fd97ccf 380 return -EIO;
c66ac9db
NB
381 }
382 spin_unlock_irq(sh->host_lock);
383 /*
384 * Claim exclusive struct block_device access to struct scsi_device
385 * for TYPE_DISK using supplied udev_path
386 */
0fd97ccf 387 bd = blkdev_get_by_path(dev->udev_path,
c66ac9db 388 FMODE_WRITE|FMODE_READ|FMODE_EXCL, pdv);
3ae279d2 389 if (IS_ERR(bd)) {
6708bb27 390 pr_err("pSCSI: blkdev_get_by_path() failed\n");
c66ac9db 391 scsi_device_put(sd);
0fd97ccf 392 return PTR_ERR(bd);
c66ac9db
NB
393 }
394 pdv->pdv_bd = bd;
395
0fd97ccf
CH
396 ret = pscsi_add_device_to_list(dev, sd);
397 if (ret) {
c66ac9db
NB
398 blkdev_put(pdv->pdv_bd, FMODE_WRITE|FMODE_READ|FMODE_EXCL);
399 scsi_device_put(sd);
0fd97ccf 400 return ret;
c66ac9db 401 }
0fd97ccf 402
9cb78c16 403 pr_debug("CORE_PSCSI[%d] - Added TYPE_DISK for %d:%d:%d:%llu\n",
c66ac9db 404 phv->phv_host_id, sh->host_no, sd->channel, sd->id, sd->lun);
0fd97ccf 405 return 0;
c66ac9db
NB
406}
407
408/*
409 * Called with struct Scsi_Host->host_lock called.
410 */
a04e54f2 411static int pscsi_create_type_nondisk(struct se_device *dev, struct scsi_device *sd)
5dd7ed2e 412 __releases(sh->host_lock)
c66ac9db 413{
0fd97ccf 414 struct pscsi_hba_virt *phv = dev->se_hba->hba_ptr;
c66ac9db 415 struct Scsi_Host *sh = sd->host;
0fd97ccf 416 int ret;
c66ac9db
NB
417
418 if (scsi_device_get(sd)) {
9cb78c16 419 pr_err("scsi_device_get() failed for %d:%d:%d:%llu\n",
c66ac9db
NB
420 sh->host_no, sd->channel, sd->id, sd->lun);
421 spin_unlock_irq(sh->host_lock);
0fd97ccf 422 return -EIO;
c66ac9db
NB
423 }
424 spin_unlock_irq(sh->host_lock);
425
0fd97ccf
CH
426 ret = pscsi_add_device_to_list(dev, sd);
427 if (ret) {
c66ac9db 428 scsi_device_put(sd);
0fd97ccf 429 return ret;
c66ac9db 430 }
9cb78c16 431 pr_debug("CORE_PSCSI[%d] - Added Type: %s for %d:%d:%d:%llu\n",
c66ac9db
NB
432 phv->phv_host_id, scsi_device_type(sd->type), sh->host_no,
433 sd->channel, sd->id, sd->lun);
434
0fd97ccf 435 return 0;
c66ac9db
NB
436}
437
ecf0dd66 438static int pscsi_configure_device(struct se_device *dev)
c66ac9db 439{
0fd97ccf
CH
440 struct se_hba *hba = dev->se_hba;
441 struct pscsi_dev_virt *pdv = PSCSI_DEV(dev);
c66ac9db 442 struct scsi_device *sd;
0fd97ccf 443 struct pscsi_hba_virt *phv = dev->se_hba->hba_ptr;
c66ac9db
NB
444 struct Scsi_Host *sh = phv->phv_lld_host;
445 int legacy_mode_enable = 0;
0fd97ccf 446 int ret;
c66ac9db 447
0fd97ccf
CH
448 if (!(pdv->pdv_flags & PDF_HAS_CHANNEL_ID) ||
449 !(pdv->pdv_flags & PDF_HAS_TARGET_ID) ||
450 !(pdv->pdv_flags & PDF_HAS_LUN_ID)) {
451 pr_err("Missing scsi_channel_id=, scsi_target_id= and"
452 " scsi_lun_id= parameters\n");
453 return -EINVAL;
c66ac9db 454 }
0fd97ccf 455
c66ac9db
NB
456 /*
457 * If not running in PHV_LLD_SCSI_HOST_NO mode, locate the
458 * struct Scsi_Host we will need to bring the TCM/pSCSI object online
459 */
6708bb27 460 if (!sh) {
c66ac9db 461 if (phv->phv_mode == PHV_LLD_SCSI_HOST_NO) {
6708bb27 462 pr_err("pSCSI: Unable to locate struct"
c66ac9db 463 " Scsi_Host for PHV_LLD_SCSI_HOST_NO\n");
0fd97ccf 464 return -ENODEV;
c66ac9db
NB
465 }
466 /*
e6a8a41a 467 * For the newer PHV_VIRTUAL_HOST_ID struct scsi_device
c66ac9db
NB
468 * reference, we enforce that udev_path has been set
469 */
0fd97ccf 470 if (!(dev->dev_flags & DF_USING_UDEV_PATH)) {
6708bb27 471 pr_err("pSCSI: udev_path attribute has not"
c66ac9db 472 " been set before ENABLE=1\n");
0fd97ccf 473 return -EINVAL;
c66ac9db
NB
474 }
475 /*
e6a8a41a 476 * If no scsi_host_id= was passed for PHV_VIRTUAL_HOST_ID,
c66ac9db
NB
477 * use the original TCM hba ID to reference Linux/SCSI Host No
478 * and enable for PHV_LLD_SCSI_HOST_NO mode.
479 */
480 if (!(pdv->pdv_flags & PDF_HAS_VIRT_HOST_ID)) {
0fd97ccf 481 if (hba->dev_count) {
6708bb27 482 pr_err("pSCSI: Unable to set hba_mode"
c66ac9db 483 " with active devices\n");
0fd97ccf 484 return -EEXIST;
c66ac9db 485 }
c66ac9db
NB
486
487 if (pscsi_pmode_enable_hba(hba, 1) != 1)
0fd97ccf 488 return -ENODEV;
c66ac9db
NB
489
490 legacy_mode_enable = 1;
491 hba->hba_flags |= HBA_FLAGS_PSCSI_MODE;
492 sh = phv->phv_lld_host;
493 } else {
e3d6f909 494 sh = scsi_host_lookup(pdv->pdv_host_id);
58932e96 495 if (!sh) {
6708bb27 496 pr_err("pSCSI: Unable to locate"
c66ac9db 497 " pdv_host_id: %d\n", pdv->pdv_host_id);
58932e96 498 return -EINVAL;
c66ac9db 499 }
5a7125c6 500 pdv->pdv_lld_host = sh;
c66ac9db
NB
501 }
502 } else {
e6a8a41a
SH
503 if (phv->phv_mode == PHV_VIRTUAL_HOST_ID) {
504 pr_err("pSCSI: PHV_VIRTUAL_HOST_ID set while"
c66ac9db 505 " struct Scsi_Host exists\n");
0fd97ccf 506 return -EEXIST;
c66ac9db
NB
507 }
508 }
509
510 spin_lock_irq(sh->host_lock);
511 list_for_each_entry(sd, &sh->__devices, siblings) {
512 if ((pdv->pdv_channel_id != sd->channel) ||
513 (pdv->pdv_target_id != sd->id) ||
514 (pdv->pdv_lun_id != sd->lun))
515 continue;
516 /*
517 * Functions will release the held struct scsi_host->host_lock
518 * before calling calling pscsi_add_device_to_list() to register
519 * struct scsi_device with target_core_mod.
520 */
521 switch (sd->type) {
522 case TYPE_DISK:
0fd97ccf 523 ret = pscsi_create_type_disk(dev, sd);
c66ac9db 524 break;
c66ac9db 525 default:
a04e54f2 526 ret = pscsi_create_type_nondisk(dev, sd);
c66ac9db
NB
527 break;
528 }
529
0fd97ccf 530 if (ret) {
e6a8a41a 531 if (phv->phv_mode == PHV_VIRTUAL_HOST_ID)
c66ac9db
NB
532 scsi_host_put(sh);
533 else if (legacy_mode_enable) {
534 pscsi_pmode_enable_hba(hba, 0);
535 hba->hba_flags &= ~HBA_FLAGS_PSCSI_MODE;
536 }
537 pdv->pdv_sd = NULL;
0fd97ccf 538 return ret;
c66ac9db 539 }
0fd97ccf 540 return 0;
c66ac9db
NB
541 }
542 spin_unlock_irq(sh->host_lock);
543
6708bb27 544 pr_err("pSCSI: Unable to locate %d:%d:%d:%d\n", sh->host_no,
c66ac9db
NB
545 pdv->pdv_channel_id, pdv->pdv_target_id, pdv->pdv_lun_id);
546
e6a8a41a 547 if (phv->phv_mode == PHV_VIRTUAL_HOST_ID)
c66ac9db
NB
548 scsi_host_put(sh);
549 else if (legacy_mode_enable) {
550 pscsi_pmode_enable_hba(hba, 0);
551 hba->hba_flags &= ~HBA_FLAGS_PSCSI_MODE;
552 }
553
0fd97ccf 554 return -ENODEV;
c66ac9db
NB
555}
556
4cc987ea
NB
557static void pscsi_dev_call_rcu(struct rcu_head *p)
558{
559 struct se_device *dev = container_of(p, struct se_device, rcu_head);
560 struct pscsi_dev_virt *pdv = PSCSI_DEV(dev);
561
562 kfree(pdv);
563}
564
0fd97ccf 565static void pscsi_free_device(struct se_device *dev)
c66ac9db 566{
0fd97ccf
CH
567 struct pscsi_dev_virt *pdv = PSCSI_DEV(dev);
568 struct pscsi_hba_virt *phv = dev->se_hba->hba_ptr;
c66ac9db
NB
569 struct scsi_device *sd = pdv->pdv_sd;
570
571 if (sd) {
572 /*
573 * Release exclusive pSCSI internal struct block_device claim for
574 * struct scsi_device with TYPE_DISK from pscsi_create_type_disk()
575 */
576 if ((sd->type == TYPE_DISK) && pdv->pdv_bd) {
577 blkdev_put(pdv->pdv_bd,
578 FMODE_WRITE|FMODE_READ|FMODE_EXCL);
579 pdv->pdv_bd = NULL;
580 }
581 /*
582 * For HBA mode PHV_LLD_SCSI_HOST_NO, release the reference
583 * to struct Scsi_Host now.
584 */
585 if ((phv->phv_mode == PHV_LLD_SCSI_HOST_NO) &&
586 (phv->phv_lld_host != NULL))
587 scsi_host_put(phv->phv_lld_host);
5a7125c6
AG
588 else if (pdv->pdv_lld_host)
589 scsi_host_put(pdv->pdv_lld_host);
c66ac9db 590
a04e54f2 591 scsi_device_put(sd);
c66ac9db
NB
592
593 pdv->pdv_sd = NULL;
594 }
4cc987ea 595 call_rcu(&dev->rcu_head, pscsi_dev_call_rcu);
c66ac9db
NB
596}
597
d5829eac
PB
598static void pscsi_transport_complete(struct se_cmd *cmd, struct scatterlist *sg,
599 unsigned char *sense_buffer)
c66ac9db 600{
0fd97ccf 601 struct pscsi_dev_virt *pdv = PSCSI_DEV(cmd->se_dev);
c66ac9db
NB
602 struct scsi_device *sd = pdv->pdv_sd;
603 int result;
5787cacd 604 struct pscsi_plugin_task *pt = cmd->priv;
1d2a2cd9
NB
605 unsigned char *cdb;
606 /*
607 * Special case for REPORT_LUNs handling where pscsi_plugin_task has
608 * not been allocated because TCM is handling the emulation directly.
609 */
610 if (!pt)
d5829eac 611 return;
c66ac9db 612
1d2a2cd9 613 cdb = &pt->pscsi_cdb[0];
c66ac9db
NB
614 result = pt->pscsi_result;
615 /*
616 * Hack to make sure that Write-Protect modepage is set if R/O mode is
617 * forced.
618 */
29a05dee 619 if (!cmd->data_length)
306c11b2
PB
620 goto after_mode_sense;
621
c66ac9db
NB
622 if (((cdb[0] == MODE_SENSE) || (cdb[0] == MODE_SENSE_10)) &&
623 (status_byte(result) << 1) == SAM_STAT_GOOD) {
29a05dee
NB
624 bool read_only = target_lun_is_rdonly(cmd);
625
626 if (read_only) {
de103c93
CH
627 unsigned char *buf;
628
629 buf = transport_kmap_data_sg(cmd);
630 if (!buf)
631 ; /* XXX: TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE */
c66ac9db
NB
632
633 if (cdb[0] == MODE_SENSE_10) {
634 if (!(buf[3] & 0x80))
635 buf[3] |= 0x80;
636 } else {
637 if (!(buf[2] & 0x80))
638 buf[2] |= 0x80;
639 }
05d1c7c0 640
5787cacd 641 transport_kunmap_data_sg(cmd);
c66ac9db
NB
642 }
643 }
644after_mode_sense:
645
306c11b2 646 if (sd->type != TYPE_TAPE || !cmd->data_length)
c66ac9db
NB
647 goto after_mode_select;
648
649 /*
650 * Hack to correctly obtain the initiator requested blocksize for
651 * TYPE_TAPE. Since this value is dependent upon each tape media,
652 * struct scsi_device->sector_size will not contain the correct value
653 * by default, so we go ahead and set it so
654 * TRANSPORT(dev)->get_blockdev() returns the correct value to the
655 * storage engine.
656 */
657 if (((cdb[0] == MODE_SELECT) || (cdb[0] == MODE_SELECT_10)) &&
658 (status_byte(result) << 1) == SAM_STAT_GOOD) {
659 unsigned char *buf;
c66ac9db
NB
660 u16 bdl;
661 u32 blocksize;
662
663 buf = sg_virt(&sg[0]);
6708bb27
AG
664 if (!buf) {
665 pr_err("Unable to get buf for scatterlist\n");
c66ac9db
NB
666 goto after_mode_select;
667 }
668
669 if (cdb[0] == MODE_SELECT)
a85d667e 670 bdl = buf[3];
c66ac9db 671 else
a85d667e 672 bdl = get_unaligned_be16(&buf[6]);
c66ac9db
NB
673
674 if (!bdl)
675 goto after_mode_select;
676
677 if (cdb[0] == MODE_SELECT)
a85d667e 678 blocksize = get_unaligned_be24(&buf[9]);
c66ac9db 679 else
a85d667e 680 blocksize = get_unaligned_be24(&buf[13]);
c66ac9db
NB
681
682 sd->sector_size = blocksize;
683 }
684after_mode_select:
685
d5829eac
PB
686 if (sense_buffer && (status_byte(result) & CHECK_CONDITION)) {
687 memcpy(sense_buffer, pt->pscsi_sense, TRANSPORT_SENSE_BUFFER);
688 cmd->se_cmd_flags |= SCF_TRANSPORT_TASK_SENSE;
689 }
c66ac9db
NB
690}
691
c66ac9db
NB
692enum {
693 Opt_scsi_host_id, Opt_scsi_channel_id, Opt_scsi_target_id,
694 Opt_scsi_lun_id, Opt_err
695};
696
697static match_table_t tokens = {
698 {Opt_scsi_host_id, "scsi_host_id=%d"},
699 {Opt_scsi_channel_id, "scsi_channel_id=%d"},
700 {Opt_scsi_target_id, "scsi_target_id=%d"},
701 {Opt_scsi_lun_id, "scsi_lun_id=%d"},
702 {Opt_err, NULL}
703};
704
0fd97ccf
CH
705static ssize_t pscsi_set_configfs_dev_params(struct se_device *dev,
706 const char *page, ssize_t count)
c66ac9db 707{
0fd97ccf
CH
708 struct pscsi_dev_virt *pdv = PSCSI_DEV(dev);
709 struct pscsi_hba_virt *phv = dev->se_hba->hba_ptr;
c66ac9db
NB
710 char *orig, *ptr, *opts;
711 substring_t args[MAX_OPT_ARGS];
712 int ret = 0, arg, token;
713
714 opts = kstrdup(page, GFP_KERNEL);
715 if (!opts)
716 return -ENOMEM;
717
718 orig = opts;
719
90c161b6 720 while ((ptr = strsep(&opts, ",\n")) != NULL) {
c66ac9db
NB
721 if (!*ptr)
722 continue;
723
724 token = match_token(ptr, tokens, args);
725 switch (token) {
726 case Opt_scsi_host_id:
727 if (phv->phv_mode == PHV_LLD_SCSI_HOST_NO) {
6708bb27 728 pr_err("PSCSI[%d]: Unable to accept"
c66ac9db
NB
729 " scsi_host_id while phv_mode =="
730 " PHV_LLD_SCSI_HOST_NO\n",
731 phv->phv_host_id);
732 ret = -EINVAL;
733 goto out;
734 }
ce31c1b0
JE
735 ret = match_int(args, &arg);
736 if (ret)
737 goto out;
c66ac9db 738 pdv->pdv_host_id = arg;
6708bb27 739 pr_debug("PSCSI[%d]: Referencing SCSI Host ID:"
c66ac9db
NB
740 " %d\n", phv->phv_host_id, pdv->pdv_host_id);
741 pdv->pdv_flags |= PDF_HAS_VIRT_HOST_ID;
742 break;
743 case Opt_scsi_channel_id:
ce31c1b0
JE
744 ret = match_int(args, &arg);
745 if (ret)
746 goto out;
c66ac9db 747 pdv->pdv_channel_id = arg;
6708bb27 748 pr_debug("PSCSI[%d]: Referencing SCSI Channel"
c66ac9db
NB
749 " ID: %d\n", phv->phv_host_id,
750 pdv->pdv_channel_id);
751 pdv->pdv_flags |= PDF_HAS_CHANNEL_ID;
752 break;
753 case Opt_scsi_target_id:
ce31c1b0
JE
754 ret = match_int(args, &arg);
755 if (ret)
756 goto out;
c66ac9db 757 pdv->pdv_target_id = arg;
6708bb27 758 pr_debug("PSCSI[%d]: Referencing SCSI Target"
c66ac9db
NB
759 " ID: %d\n", phv->phv_host_id,
760 pdv->pdv_target_id);
761 pdv->pdv_flags |= PDF_HAS_TARGET_ID;
762 break;
763 case Opt_scsi_lun_id:
ce31c1b0
JE
764 ret = match_int(args, &arg);
765 if (ret)
766 goto out;
c66ac9db 767 pdv->pdv_lun_id = arg;
6708bb27 768 pr_debug("PSCSI[%d]: Referencing SCSI LUN ID:"
c66ac9db
NB
769 " %d\n", phv->phv_host_id, pdv->pdv_lun_id);
770 pdv->pdv_flags |= PDF_HAS_LUN_ID;
771 break;
772 default:
773 break;
774 }
775 }
776
777out:
778 kfree(orig);
779 return (!ret) ? count : ret;
780}
781
0fd97ccf 782static ssize_t pscsi_show_configfs_dev_params(struct se_device *dev, char *b)
c66ac9db 783{
0fd97ccf
CH
784 struct pscsi_hba_virt *phv = dev->se_hba->hba_ptr;
785 struct pscsi_dev_virt *pdv = PSCSI_DEV(dev);
c66ac9db
NB
786 struct scsi_device *sd = pdv->pdv_sd;
787 unsigned char host_id[16];
788 ssize_t bl;
789 int i;
790
e6a8a41a 791 if (phv->phv_mode == PHV_VIRTUAL_HOST_ID)
c66ac9db
NB
792 snprintf(host_id, 16, "%d", pdv->pdv_host_id);
793 else
794 snprintf(host_id, 16, "PHBA Mode");
795
796 bl = sprintf(b, "SCSI Device Bus Location:"
797 " Channel ID: %d Target ID: %d LUN: %d Host ID: %s\n",
798 pdv->pdv_channel_id, pdv->pdv_target_id, pdv->pdv_lun_id,
799 host_id);
800
801 if (sd) {
802 bl += sprintf(b + bl, " ");
803 bl += sprintf(b + bl, "Vendor: ");
804 for (i = 0; i < 8; i++) {
805 if (ISPRINT(sd->vendor[i])) /* printable character? */
806 bl += sprintf(b + bl, "%c", sd->vendor[i]);
807 else
808 bl += sprintf(b + bl, " ");
809 }
810 bl += sprintf(b + bl, " Model: ");
811 for (i = 0; i < 16; i++) {
812 if (ISPRINT(sd->model[i])) /* printable character ? */
813 bl += sprintf(b + bl, "%c", sd->model[i]);
814 else
815 bl += sprintf(b + bl, " ");
816 }
817 bl += sprintf(b + bl, " Rev: ");
818 for (i = 0; i < 4; i++) {
819 if (ISPRINT(sd->rev[i])) /* printable character ? */
820 bl += sprintf(b + bl, "%c", sd->rev[i]);
821 else
822 bl += sprintf(b + bl, " ");
823 }
824 bl += sprintf(b + bl, "\n");
825 }
826 return bl;
827}
828
4246a0b6 829static void pscsi_bi_endio(struct bio *bio)
c66ac9db
NB
830{
831 bio_put(bio);
832}
833
2dbe10a2 834static inline struct bio *pscsi_get_bio(int nr_vecs)
c66ac9db
NB
835{
836 struct bio *bio;
837 /*
838 * Use bio_malloc() following the comment in for bio -> struct request
839 * in block/blk-core.c:blk_make_request()
840 */
2dbe10a2 841 bio = bio_kmalloc(GFP_KERNEL, nr_vecs);
6708bb27
AG
842 if (!bio) {
843 pr_err("PSCSI: bio_kmalloc() failed\n");
c66ac9db
NB
844 return NULL;
845 }
846 bio->bi_end_io = pscsi_bi_endio;
847
848 return bio;
849}
850
de103c93
CH
851static sense_reason_t
852pscsi_map_sg(struct se_cmd *cmd, struct scatterlist *sgl, u32 sgl_nents,
dd9cf046 853 struct request *req)
c66ac9db 854{
0fd97ccf 855 struct pscsi_dev_virt *pdv = PSCSI_DEV(cmd->se_dev);
dd9cf046 856 struct bio *bio = NULL;
c66ac9db
NB
857 struct page *page;
858 struct scatterlist *sg;
7a83aa4e 859 u32 data_len = cmd->data_length, i, len, bytes, off;
5787cacd 860 int nr_pages = (cmd->data_length + sgl[0].offset +
c66ac9db 861 PAGE_SIZE - 1) >> PAGE_SHIFT;
03e98c9e 862 int nr_vecs = 0, rc;
dd9cf046 863 int rw = (cmd->data_direction == DMA_TO_DEVICE);
c66ac9db 864
dd9cf046 865 BUG_ON(!cmd->data_length);
02b1a746 866
6708bb27 867 pr_debug("PSCSI: nr_pages: %d\n", nr_pages);
c66ac9db 868
5787cacd 869 for_each_sg(sgl, sg, sgl_nents, i) {
c66ac9db
NB
870 page = sg_page(sg);
871 off = sg->offset;
872 len = sg->length;
873
6708bb27 874 pr_debug("PSCSI: i: %d page: %p len: %d off: %d\n", i,
c66ac9db
NB
875 page, len, off);
876
8f27d487
AH
877 /*
878 * We only have one page of data in each sg element,
879 * we can not cross a page boundary.
880 */
881 if (off + len > PAGE_SIZE)
882 goto fail;
883
884 if (len > 0 && data_len > 0) {
c66ac9db
NB
885 bytes = min_t(unsigned int, len, PAGE_SIZE - off);
886 bytes = min(bytes, data_len);
887
6708bb27 888 if (!bio) {
c66ac9db
NB
889 nr_vecs = min_t(int, BIO_MAX_PAGES, nr_pages);
890 nr_pages -= nr_vecs;
891 /*
892 * Calls bio_kmalloc() and sets bio->bi_end_io()
893 */
a1d8b49a 894 bio = pscsi_get_bio(nr_vecs);
6708bb27 895 if (!bio)
c66ac9db
NB
896 goto fail;
897
898 if (rw)
e742fc32 899 bio_set_op_attrs(bio, REQ_OP_WRITE, 0);
c66ac9db 900
6708bb27 901 pr_debug("PSCSI: Allocated bio: %p,"
c66ac9db
NB
902 " dir: %s nr_vecs: %d\n", bio,
903 (rw) ? "rw" : "r", nr_vecs);
c66ac9db
NB
904 }
905
6708bb27 906 pr_debug("PSCSI: Calling bio_add_pc_page() i: %d"
c66ac9db
NB
907 " bio: %p page: %p len: %d off: %d\n", i, bio,
908 page, len, off);
909
910 rc = bio_add_pc_page(pdv->pdv_sd->request_queue,
911 bio, page, bytes, off);
6708bb27 912 pr_debug("PSCSI: bio->bi_vcnt: %d nr_vecs: %d\n",
84c85906
ML
913 bio_segments(bio), nr_vecs);
914 if (rc != bytes) {
6708bb27 915 pr_debug("PSCSI: Reached bio->bi_vcnt max:"
c66ac9db
NB
916 " %d i: %d bio: %p, allocating another"
917 " bio\n", bio->bi_vcnt, i, bio);
dd9cf046
CH
918
919 rc = blk_rq_append_bio(req, bio);
920 if (rc) {
921 pr_err("pSCSI: failed to append bio\n");
922 goto fail;
923 }
924
c66ac9db
NB
925 /*
926 * Clear the pointer so that another bio will
dd9cf046 927 * be allocated with pscsi_get_bio() above.
c66ac9db
NB
928 */
929 bio = NULL;
930 }
931
c66ac9db 932 data_len -= bytes;
c66ac9db
NB
933 }
934 }
c66ac9db 935
dd9cf046
CH
936 if (bio) {
937 rc = blk_rq_append_bio(req, bio);
938 if (rc) {
939 pr_err("pSCSI: failed to append bio\n");
940 goto fail;
941 }
942 }
943
de103c93 944 return 0;
c66ac9db 945fail:
de103c93 946 return TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE;
c66ac9db
NB
947}
948
de103c93
CH
949static sense_reason_t
950pscsi_parse_cdb(struct se_cmd *cmd)
d6e0175c 951{
de103c93
CH
952 if (cmd->se_cmd_flags & SCF_BIDI)
953 return TCM_UNSUPPORTED_SCSI_OPCODE;
d6e0175c 954
7bfea53b 955 return passthrough_parse_cdb(cmd, pscsi_execute_cmd);
d6e0175c
CH
956}
957
de103c93
CH
958static sense_reason_t
959pscsi_execute_cmd(struct se_cmd *cmd)
c66ac9db 960{
0c2ad7d1
CH
961 struct scatterlist *sgl = cmd->t_data_sg;
962 u32 sgl_nents = cmd->t_data_nents;
0fd97ccf 963 struct pscsi_dev_virt *pdv = PSCSI_DEV(cmd->se_dev);
5787cacd 964 struct pscsi_plugin_task *pt;
02b1a746 965 struct request *req;
de103c93 966 sense_reason_t ret;
c66ac9db 967
5787cacd
CH
968 /*
969 * Dynamically alloc cdb space, since it may be larger than
970 * TCM_MAX_COMMAND_SIZE
971 */
972 pt = kzalloc(sizeof(*pt) + scsi_command_size(cmd->t_task_cdb), GFP_KERNEL);
973 if (!pt) {
de103c93 974 return TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE;
5787cacd
CH
975 }
976 cmd->priv = pt;
977
ed3102c6
CH
978 memcpy(pt->pscsi_cdb, cmd->t_task_cdb,
979 scsi_command_size(cmd->t_task_cdb));
485fd0d1 980
dd9cf046 981 req = blk_get_request(pdv->pdv_sd->request_queue,
aebf526b
CH
982 cmd->data_direction == DMA_TO_DEVICE ?
983 REQ_OP_SCSI_OUT : REQ_OP_SCSI_IN,
dd9cf046
CH
984 GFP_KERNEL);
985 if (IS_ERR(req)) {
986 pr_err("PSCSI: blk_get_request() failed\n");
987 ret = TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE;
988 goto fail;
989 }
f27b087b 990
82ed4db4 991 scsi_req_init(req);
c66ac9db 992
dd9cf046
CH
993 if (sgl) {
994 ret = pscsi_map_sg(cmd, sgl, sgl_nents, req);
de103c93 995 if (ret)
dd9cf046 996 goto fail_put_request;
c66ac9db
NB
997 }
998
02b1a746 999 req->end_io = pscsi_req_done;
5787cacd 1000 req->end_io_data = cmd;
82ed4db4
CH
1001 scsi_req(req)->cmd_len = scsi_command_size(pt->pscsi_cdb);
1002 scsi_req(req)->cmd = &pt->pscsi_cdb[0];
02b1a746
CH
1003 if (pdv->pdv_sd->type == TYPE_DISK)
1004 req->timeout = PS_TIMEOUT_DISK;
1005 else
1006 req->timeout = PS_TIMEOUT_OTHER;
64c7f1d1 1007 scsi_req(req)->retries = PS_RETRY;
c66ac9db 1008
02b1a746 1009 blk_execute_rq_nowait(pdv->pdv_sd->request_queue, NULL, req,
68d81f40 1010 (cmd->sam_task_attr == TCM_HEAD_TAG),
02b1a746
CH
1011 pscsi_req_done);
1012
03e98c9e 1013 return 0;
02b1a746 1014
dd9cf046
CH
1015fail_put_request:
1016 blk_put_request(req);
5787cacd
CH
1017fail:
1018 kfree(pt);
de103c93 1019 return ret;
c66ac9db
NB
1020}
1021
c66ac9db
NB
1022/* pscsi_get_device_type():
1023 *
1024 *
1025 */
1026static u32 pscsi_get_device_type(struct se_device *dev)
1027{
0fd97ccf 1028 struct pscsi_dev_virt *pdv = PSCSI_DEV(dev);
c66ac9db
NB
1029 struct scsi_device *sd = pdv->pdv_sd;
1030
215a8fe4 1031 return (sd) ? sd->type : TYPE_NO_LUN;
c66ac9db
NB
1032}
1033
1034static sector_t pscsi_get_blocks(struct se_device *dev)
1035{
0fd97ccf 1036 struct pscsi_dev_virt *pdv = PSCSI_DEV(dev);
c66ac9db
NB
1037
1038 if (pdv->pdv_bd && pdv->pdv_bd->bd_part)
1039 return pdv->pdv_bd->bd_part->nr_sects;
1040
c66ac9db
NB
1041 return 0;
1042}
1043
5787cacd 1044static void pscsi_req_done(struct request *req, int uptodate)
c66ac9db 1045{
5787cacd
CH
1046 struct se_cmd *cmd = req->end_io_data;
1047 struct pscsi_plugin_task *pt = cmd->priv;
1048
17d5363b 1049 pt->pscsi_result = scsi_req(req)->result;
82ed4db4 1050 pt->pscsi_resid = scsi_req(req)->resid_len;
5787cacd
CH
1051
1052 cmd->scsi_status = status_byte(pt->pscsi_result) << 1;
1053 if (cmd->scsi_status) {
1054 pr_debug("PSCSI Status Byte exception at cmd: %p CDB:"
1055 " 0x%02x Result: 0x%08x\n", cmd, pt->pscsi_cdb[0],
c66ac9db
NB
1056 pt->pscsi_result);
1057 }
1058
1059 switch (host_byte(pt->pscsi_result)) {
1060 case DID_OK:
5787cacd 1061 target_complete_cmd(cmd, cmd->scsi_status);
c66ac9db
NB
1062 break;
1063 default:
5787cacd
CH
1064 pr_debug("PSCSI Host Byte exception at cmd: %p CDB:"
1065 " 0x%02x Result: 0x%08x\n", cmd, pt->pscsi_cdb[0],
c66ac9db 1066 pt->pscsi_result);
5787cacd 1067 target_complete_cmd(cmd, SAM_STAT_CHECK_CONDITION);
c66ac9db
NB
1068 break;
1069 }
c66ac9db 1070
82ed4db4 1071 memcpy(pt->pscsi_sense, scsi_req(req)->sense, TRANSPORT_SENSE_BUFFER);
c66ac9db 1072 __blk_put_request(req->q, req);
5787cacd 1073 kfree(pt);
c66ac9db
NB
1074}
1075
0a06d430 1076static const struct target_backend_ops pscsi_ops = {
c66ac9db
NB
1077 .name = "pscsi",
1078 .owner = THIS_MODULE,
530c6891 1079 .transport_flags = TRANSPORT_FLAG_PASSTHROUGH |
4ec5bf0e
BL
1080 TRANSPORT_FLAG_PASSTHROUGH_ALUA |
1081 TRANSPORT_FLAG_PASSTHROUGH_PGR,
c66ac9db
NB
1082 .attach_hba = pscsi_attach_hba,
1083 .detach_hba = pscsi_detach_hba,
1084 .pmode_enable_hba = pscsi_pmode_enable_hba,
0fd97ccf
CH
1085 .alloc_device = pscsi_alloc_device,
1086 .configure_device = pscsi_configure_device,
c66ac9db
NB
1087 .free_device = pscsi_free_device,
1088 .transport_complete = pscsi_transport_complete,
d6e0175c 1089 .parse_cdb = pscsi_parse_cdb,
c66ac9db
NB
1090 .set_configfs_dev_params = pscsi_set_configfs_dev_params,
1091 .show_configfs_dev_params = pscsi_show_configfs_dev_params,
c66ac9db
NB
1092 .get_device_type = pscsi_get_device_type,
1093 .get_blocks = pscsi_get_blocks,
5873c4d1 1094 .tb_dev_attrib_attrs = passthrough_attrib_attrs,
c66ac9db
NB
1095};
1096
1097static int __init pscsi_module_init(void)
1098{
0a06d430 1099 return transport_backend_register(&pscsi_ops);
c66ac9db
NB
1100}
1101
63b91d5a 1102static void __exit pscsi_module_exit(void)
c66ac9db 1103{
0a06d430 1104 target_backend_unregister(&pscsi_ops);
c66ac9db
NB
1105}
1106
1107MODULE_DESCRIPTION("TCM PSCSI subsystem plugin");
1108MODULE_AUTHOR("nab@Linux-iSCSI.org");
1109MODULE_LICENSE("GPL");
1110
1111module_init(pscsi_module_init);
1112module_exit(pscsi_module_exit);