Merge tag 'arm-fixes-6.11-3' of git://git.kernel.org/pub/scm/linux/kernel/git/soc/soc
[linux-block.git] / drivers / target / target_core_pscsi.c
CommitLineData
1a59d1b8 1// SPDX-License-Identifier: GPL-2.0-or-later
c66ac9db
NB
2/*******************************************************************************
3 * Filename: target_core_pscsi.c
4 *
5 * This file contains the generic target mode <-> Linux SCSI subsystem plugin.
6 *
4c76251e 7 * (c) Copyright 2003-2013 Datera, Inc.
c66ac9db
NB
8 *
9 * Nicholas A. Bellinger <nab@kernel.org>
10 *
c66ac9db
NB
11 ******************************************************************************/
12
c66ac9db
NB
13#include <linux/string.h>
14#include <linux/parser.h>
15#include <linux/timer.h>
16#include <linux/blkdev.h>
17#include <linux/blk_types.h>
18#include <linux/slab.h>
19#include <linux/spinlock.h>
c66ac9db 20#include <linux/cdrom.h>
d6e0175c 21#include <linux/ratelimit.h>
827509e3 22#include <linux/module.h>
d6e0175c
CH
23#include <asm/unaligned.h>
24
c66ac9db 25#include <scsi/scsi_device.h>
c66ac9db 26#include <scsi/scsi_host.h>
e66ecd50 27#include <scsi/scsi_tcq.h>
c66ac9db
NB
28
29#include <target/target_core_base.h>
c4795fb2 30#include <target/target_core_backend.h>
c66ac9db 31
d6e0175c 32#include "target_core_alua.h"
29a05dee 33#include "target_core_internal.h"
c66ac9db
NB
34#include "target_core_pscsi.h"
35
0fd97ccf
CH
36static inline struct pscsi_dev_virt *PSCSI_DEV(struct se_device *dev)
37{
38 return container_of(dev, struct pscsi_dev_virt, dev);
39}
40
de103c93 41static sense_reason_t pscsi_execute_cmd(struct se_cmd *cmd);
de671d61 42static enum rq_end_io_ret pscsi_req_done(struct request *, blk_status_t);
c66ac9db 43
c66ac9db
NB
44/* pscsi_attach_hba():
45 *
46 * pscsi_get_sh() used scsi_host_lookup() to locate struct Scsi_Host.
47 * from the passed SCSI Host ID.
48 */
49static int pscsi_attach_hba(struct se_hba *hba, u32 host_id)
50{
c66ac9db
NB
51 struct pscsi_hba_virt *phv;
52
53 phv = kzalloc(sizeof(struct pscsi_hba_virt), GFP_KERNEL);
6708bb27
AG
54 if (!phv) {
55 pr_err("Unable to allocate struct pscsi_hba_virt\n");
e3d6f909 56 return -ENOMEM;
c66ac9db
NB
57 }
58 phv->phv_host_id = host_id;
e6a8a41a 59 phv->phv_mode = PHV_VIRTUAL_HOST_ID;
c66ac9db 60
5951146d 61 hba->hba_ptr = phv;
c66ac9db 62
6708bb27 63 pr_debug("CORE_HBA[%d] - TCM SCSI HBA Driver %s on"
c66ac9db 64 " Generic Target Core Stack %s\n", hba->hba_id,
ce8dd25d 65 PSCSI_VERSION, TARGET_CORE_VERSION);
6708bb27 66 pr_debug("CORE_HBA[%d] - Attached SCSI HBA to Generic\n",
e3d6f909 67 hba->hba_id);
c66ac9db
NB
68
69 return 0;
70}
71
72static void pscsi_detach_hba(struct se_hba *hba)
73{
74 struct pscsi_hba_virt *phv = hba->hba_ptr;
75 struct Scsi_Host *scsi_host = phv->phv_lld_host;
76
77 if (scsi_host) {
78 scsi_host_put(scsi_host);
79
6708bb27 80 pr_debug("CORE_HBA[%d] - Detached SCSI HBA: %s from"
c66ac9db
NB
81 " Generic Target Core\n", hba->hba_id,
82 (scsi_host->hostt->name) ? (scsi_host->hostt->name) :
83 "Unknown");
84 } else
6708bb27 85 pr_debug("CORE_HBA[%d] - Detached Virtual SCSI HBA"
c66ac9db
NB
86 " from Generic Target Core\n", hba->hba_id);
87
88 kfree(phv);
89 hba->hba_ptr = NULL;
90}
91
92static int pscsi_pmode_enable_hba(struct se_hba *hba, unsigned long mode_flag)
93{
8359cf43 94 struct pscsi_hba_virt *phv = hba->hba_ptr;
c66ac9db 95 struct Scsi_Host *sh = phv->phv_lld_host;
c66ac9db
NB
96 /*
97 * Release the struct Scsi_Host
98 */
6708bb27
AG
99 if (!mode_flag) {
100 if (!sh)
c66ac9db
NB
101 return 0;
102
103 phv->phv_lld_host = NULL;
e6a8a41a 104 phv->phv_mode = PHV_VIRTUAL_HOST_ID;
c66ac9db 105
6708bb27 106 pr_debug("CORE_HBA[%d] - Disabled pSCSI HBA Passthrough"
c66ac9db
NB
107 " %s\n", hba->hba_id, (sh->hostt->name) ?
108 (sh->hostt->name) : "Unknown");
109
110 scsi_host_put(sh);
111 return 0;
112 }
113 /*
114 * Otherwise, locate struct Scsi_Host from the original passed
115 * pSCSI Host ID and enable for phba mode
116 */
e3d6f909 117 sh = scsi_host_lookup(phv->phv_host_id);
58932e96 118 if (!sh) {
6708bb27 119 pr_err("pSCSI: Unable to locate SCSI Host for"
c66ac9db 120 " phv_host_id: %d\n", phv->phv_host_id);
58932e96 121 return -EINVAL;
c66ac9db 122 }
c66ac9db
NB
123
124 phv->phv_lld_host = sh;
125 phv->phv_mode = PHV_LLD_SCSI_HOST_NO;
126
6708bb27 127 pr_debug("CORE_HBA[%d] - Enabled pSCSI HBA Passthrough %s\n",
c66ac9db
NB
128 hba->hba_id, (sh->hostt->name) ? (sh->hostt->name) : "Unknown");
129
130 return 1;
131}
132
133static void pscsi_tape_read_blocksize(struct se_device *dev,
134 struct scsi_device *sdev)
135{
136 unsigned char cdb[MAX_COMMAND_SIZE], *buf;
137 int ret;
138
139 buf = kzalloc(12, GFP_KERNEL);
140 if (!buf)
a04e54f2 141 goto out_free;
c66ac9db
NB
142
143 memset(cdb, 0, MAX_COMMAND_SIZE);
144 cdb[0] = MODE_SENSE;
145 cdb[4] = 0x0c; /* 12 bytes */
146
e335795f 147 ret = scsi_execute_cmd(sdev, cdb, REQ_OP_DRV_IN, buf, 12, HZ, 1, NULL);
c66ac9db
NB
148 if (ret)
149 goto out_free;
150
151 /*
152 * If MODE_SENSE still returns zero, set the default value to 1024.
153 */
a85d667e 154 sdev->sector_size = get_unaligned_be24(&buf[9]);
a04e54f2 155out_free:
c66ac9db
NB
156 if (!sdev->sector_size)
157 sdev->sector_size = 1024;
a04e54f2 158
c66ac9db
NB
159 kfree(buf);
160}
161
162static void
163pscsi_set_inquiry_info(struct scsi_device *sdev, struct t10_wwn *wwn)
164{
c66ac9db
NB
165 if (sdev->inquiry_len < INQUIRY_LEN)
166 return;
c66ac9db 167 /*
b2da4abf 168 * Use sdev->inquiry data from drivers/scsi/scsi_scan.c:scsi_add_lun()
c66ac9db 169 */
b2da4abf
DD
170 BUILD_BUG_ON(sizeof(wwn->vendor) != INQUIRY_VENDOR_LEN + 1);
171 snprintf(wwn->vendor, sizeof(wwn->vendor),
172 "%." __stringify(INQUIRY_VENDOR_LEN) "s", sdev->vendor);
173 BUILD_BUG_ON(sizeof(wwn->model) != INQUIRY_MODEL_LEN + 1);
174 snprintf(wwn->model, sizeof(wwn->model),
175 "%." __stringify(INQUIRY_MODEL_LEN) "s", sdev->model);
176 BUILD_BUG_ON(sizeof(wwn->revision) != INQUIRY_REVISION_LEN + 1);
177 snprintf(wwn->revision, sizeof(wwn->revision),
178 "%." __stringify(INQUIRY_REVISION_LEN) "s", sdev->rev);
c66ac9db
NB
179}
180
181static int
182pscsi_get_inquiry_vpd_serial(struct scsi_device *sdev, struct t10_wwn *wwn)
183{
184 unsigned char cdb[MAX_COMMAND_SIZE], *buf;
185 int ret;
186
187 buf = kzalloc(INQUIRY_VPD_SERIAL_LEN, GFP_KERNEL);
188 if (!buf)
e3d6f909 189 return -ENOMEM;
c66ac9db
NB
190
191 memset(cdb, 0, MAX_COMMAND_SIZE);
192 cdb[0] = INQUIRY;
193 cdb[1] = 0x01; /* Query VPD */
194 cdb[2] = 0x80; /* Unit Serial Number */
a85d667e 195 put_unaligned_be16(INQUIRY_VPD_SERIAL_LEN, &cdb[3]);
c66ac9db 196
e335795f
MC
197 ret = scsi_execute_cmd(sdev, cdb, REQ_OP_DRV_IN, buf,
198 INQUIRY_VPD_SERIAL_LEN, HZ, 1, NULL);
c66ac9db
NB
199 if (ret)
200 goto out_free;
201
202 snprintf(&wwn->unit_serial[0], INQUIRY_VPD_SERIAL_LEN, "%s", &buf[4]);
203
0fd97ccf 204 wwn->t10_dev->dev_flags |= DF_FIRMWARE_VPD_UNIT_SERIAL;
c66ac9db
NB
205
206 kfree(buf);
207 return 0;
208
209out_free:
210 kfree(buf);
e3d6f909 211 return -EPERM;
c66ac9db
NB
212}
213
214static void
215pscsi_get_inquiry_vpd_device_ident(struct scsi_device *sdev,
216 struct t10_wwn *wwn)
217{
218 unsigned char cdb[MAX_COMMAND_SIZE], *buf, *page_83;
219 int ident_len, page_len, off = 4, ret;
220 struct t10_vpd *vpd;
221
222 buf = kzalloc(INQUIRY_VPD_SERIAL_LEN, GFP_KERNEL);
223 if (!buf)
224 return;
225
226 memset(cdb, 0, MAX_COMMAND_SIZE);
227 cdb[0] = INQUIRY;
228 cdb[1] = 0x01; /* Query VPD */
229 cdb[2] = 0x83; /* Device Identifier */
a85d667e 230 put_unaligned_be16(INQUIRY_VPD_DEVICE_IDENTIFIER_LEN, &cdb[3]);
c66ac9db 231
e335795f
MC
232 ret = scsi_execute_cmd(sdev, cdb, REQ_OP_DRV_IN, buf,
233 INQUIRY_VPD_DEVICE_IDENTIFIER_LEN, HZ, 1, NULL);
c66ac9db
NB
234 if (ret)
235 goto out;
236
a85d667e 237 page_len = get_unaligned_be16(&buf[2]);
c66ac9db
NB
238 while (page_len > 0) {
239 /* Grab a pointer to the Identification descriptor */
240 page_83 = &buf[off];
241 ident_len = page_83[3];
242 if (!ident_len) {
6708bb27 243 pr_err("page_83[3]: identifier"
c66ac9db
NB
244 " length zero!\n");
245 break;
246 }
35d1efe8 247 pr_debug("T10 VPD Identifier Length: %d\n", ident_len);
c66ac9db
NB
248
249 vpd = kzalloc(sizeof(struct t10_vpd), GFP_KERNEL);
250 if (!vpd) {
6708bb27 251 pr_err("Unable to allocate memory for"
c66ac9db
NB
252 " struct t10_vpd\n");
253 goto out;
254 }
255 INIT_LIST_HEAD(&vpd->vpd_list);
256
257 transport_set_vpd_proto_id(vpd, page_83);
258 transport_set_vpd_assoc(vpd, page_83);
259
260 if (transport_set_vpd_ident_type(vpd, page_83) < 0) {
261 off += (ident_len + 4);
262 page_len -= (ident_len + 4);
263 kfree(vpd);
264 continue;
265 }
266 if (transport_set_vpd_ident(vpd, page_83) < 0) {
267 off += (ident_len + 4);
268 page_len -= (ident_len + 4);
269 kfree(vpd);
270 continue;
271 }
272
273 list_add_tail(&vpd->vpd_list, &wwn->t10_vpd_list);
274 off += (ident_len + 4);
275 page_len -= (ident_len + 4);
276 }
277
278out:
279 kfree(buf);
280}
281
0fd97ccf
CH
282static int pscsi_add_device_to_list(struct se_device *dev,
283 struct scsi_device *sd)
c66ac9db 284{
0fd97ccf
CH
285 struct pscsi_dev_virt *pdv = PSCSI_DEV(dev);
286 struct request_queue *q = sd->request_queue;
c66ac9db 287
0fd97ccf 288 pdv->pdv_sd = sd;
c66ac9db
NB
289
290 if (!sd->queue_depth) {
291 sd->queue_depth = PSCSI_DEFAULT_QUEUEDEPTH;
292
9cb78c16 293 pr_err("Set broken SCSI Device %d:%d:%llu"
c66ac9db
NB
294 " queue_depth to %d\n", sd->channel, sd->id,
295 sd->lun, sd->queue_depth);
296 }
0fd97ccf 297
a04e54f2
NB
298 dev->dev_attrib.hw_block_size =
299 min_not_zero((int)sd->sector_size, 512);
0fd97ccf 300 dev->dev_attrib.hw_max_sectors =
a04e54f2 301 min_not_zero(sd->host->max_sectors, queue_max_hw_sectors(q));
0fd97ccf
CH
302 dev->dev_attrib.hw_queue_depth = sd->queue_depth;
303
c66ac9db
NB
304 /*
305 * Setup our standard INQUIRY info into se_dev->t10_wwn
306 */
0fd97ccf 307 pscsi_set_inquiry_info(sd, &dev->t10_wwn);
c66ac9db
NB
308
309 /*
310 * Locate VPD WWN Information used for various purposes within
311 * the Storage Engine.
312 */
0fd97ccf 313 if (!pscsi_get_inquiry_vpd_serial(sd, &dev->t10_wwn)) {
c66ac9db
NB
314 /*
315 * If VPD Unit Serial returned GOOD status, try
316 * VPD Device Identification page (0x83).
317 */
0fd97ccf 318 pscsi_get_inquiry_vpd_device_ident(sd, &dev->t10_wwn);
c66ac9db
NB
319 }
320
321 /*
322 * For TYPE_TAPE, attempt to determine blocksize with MODE_SENSE.
323 */
a04e54f2 324 if (sd->type == TYPE_TAPE) {
c66ac9db 325 pscsi_tape_read_blocksize(dev, sd);
a04e54f2
NB
326 dev->dev_attrib.hw_block_size = sd->sector_size;
327 }
0fd97ccf 328 return 0;
c66ac9db
NB
329}
330
0fd97ccf
CH
331static struct se_device *pscsi_alloc_device(struct se_hba *hba,
332 const char *name)
c66ac9db
NB
333{
334 struct pscsi_dev_virt *pdv;
335
336 pdv = kzalloc(sizeof(struct pscsi_dev_virt), GFP_KERNEL);
6708bb27
AG
337 if (!pdv) {
338 pr_err("Unable to allocate memory for struct pscsi_dev_virt\n");
c66ac9db
NB
339 return NULL;
340 }
c66ac9db 341
6708bb27 342 pr_debug("PSCSI: Allocated pdv: %p for %s\n", pdv, name);
0fd97ccf 343 return &pdv->dev;
c66ac9db
NB
344}
345
346/*
347 * Called with struct Scsi_Host->host_lock called.
348 */
0fd97ccf 349static int pscsi_create_type_disk(struct se_device *dev, struct scsi_device *sd)
5dd7ed2e 350 __releases(sh->host_lock)
c66ac9db 351{
0fd97ccf
CH
352 struct pscsi_hba_virt *phv = dev->se_hba->hba_ptr;
353 struct pscsi_dev_virt *pdv = PSCSI_DEV(dev);
c66ac9db 354 struct Scsi_Host *sh = sd->host;
034f0cf8 355 struct file *bdev_file;
0fd97ccf 356 int ret;
c66ac9db
NB
357
358 if (scsi_device_get(sd)) {
9cb78c16 359 pr_err("scsi_device_get() failed for %d:%d:%d:%llu\n",
c66ac9db
NB
360 sh->host_no, sd->channel, sd->id, sd->lun);
361 spin_unlock_irq(sh->host_lock);
0fd97ccf 362 return -EIO;
c66ac9db
NB
363 }
364 spin_unlock_irq(sh->host_lock);
365 /*
366 * Claim exclusive struct block_device access to struct scsi_device
016a5fec 367 * for TYPE_DISK and TYPE_ZBC using supplied udev_path
c66ac9db 368 */
034f0cf8 369 bdev_file = bdev_file_open_by_path(dev->udev_path,
e6aafdc8 370 BLK_OPEN_WRITE | BLK_OPEN_READ, pdv, NULL);
034f0cf8 371 if (IS_ERR(bdev_file)) {
e6aafdc8 372 pr_err("pSCSI: bdev_open_by_path() failed\n");
c66ac9db 373 scsi_device_put(sd);
034f0cf8 374 return PTR_ERR(bdev_file);
c66ac9db 375 }
034f0cf8 376 pdv->pdv_bdev_file = bdev_file;
c66ac9db 377
0fd97ccf
CH
378 ret = pscsi_add_device_to_list(dev, sd);
379 if (ret) {
034f0cf8 380 fput(bdev_file);
c66ac9db 381 scsi_device_put(sd);
0fd97ccf 382 return ret;
c66ac9db 383 }
0fd97ccf 384
016a5fec
DLM
385 pr_debug("CORE_PSCSI[%d] - Added TYPE_%s for %d:%d:%d:%llu\n",
386 phv->phv_host_id, sd->type == TYPE_DISK ? "DISK" : "ZBC",
387 sh->host_no, sd->channel, sd->id, sd->lun);
0fd97ccf 388 return 0;
c66ac9db
NB
389}
390
391/*
392 * Called with struct Scsi_Host->host_lock called.
393 */
a04e54f2 394static int pscsi_create_type_nondisk(struct se_device *dev, struct scsi_device *sd)
5dd7ed2e 395 __releases(sh->host_lock)
c66ac9db 396{
0fd97ccf 397 struct pscsi_hba_virt *phv = dev->se_hba->hba_ptr;
c66ac9db 398 struct Scsi_Host *sh = sd->host;
0fd97ccf 399 int ret;
c66ac9db
NB
400
401 if (scsi_device_get(sd)) {
9cb78c16 402 pr_err("scsi_device_get() failed for %d:%d:%d:%llu\n",
c66ac9db
NB
403 sh->host_no, sd->channel, sd->id, sd->lun);
404 spin_unlock_irq(sh->host_lock);
0fd97ccf 405 return -EIO;
c66ac9db
NB
406 }
407 spin_unlock_irq(sh->host_lock);
408
0fd97ccf
CH
409 ret = pscsi_add_device_to_list(dev, sd);
410 if (ret) {
c66ac9db 411 scsi_device_put(sd);
0fd97ccf 412 return ret;
c66ac9db 413 }
9cb78c16 414 pr_debug("CORE_PSCSI[%d] - Added Type: %s for %d:%d:%d:%llu\n",
c66ac9db
NB
415 phv->phv_host_id, scsi_device_type(sd->type), sh->host_no,
416 sd->channel, sd->id, sd->lun);
417
0fd97ccf 418 return 0;
c66ac9db
NB
419}
420
ecf0dd66 421static int pscsi_configure_device(struct se_device *dev)
c66ac9db 422{
0fd97ccf
CH
423 struct se_hba *hba = dev->se_hba;
424 struct pscsi_dev_virt *pdv = PSCSI_DEV(dev);
c66ac9db 425 struct scsi_device *sd;
0fd97ccf 426 struct pscsi_hba_virt *phv = dev->se_hba->hba_ptr;
c66ac9db
NB
427 struct Scsi_Host *sh = phv->phv_lld_host;
428 int legacy_mode_enable = 0;
0fd97ccf 429 int ret;
c66ac9db 430
0fd97ccf
CH
431 if (!(pdv->pdv_flags & PDF_HAS_CHANNEL_ID) ||
432 !(pdv->pdv_flags & PDF_HAS_TARGET_ID) ||
433 !(pdv->pdv_flags & PDF_HAS_LUN_ID)) {
434 pr_err("Missing scsi_channel_id=, scsi_target_id= and"
435 " scsi_lun_id= parameters\n");
436 return -EINVAL;
c66ac9db 437 }
0fd97ccf 438
c66ac9db
NB
439 /*
440 * If not running in PHV_LLD_SCSI_HOST_NO mode, locate the
441 * struct Scsi_Host we will need to bring the TCM/pSCSI object online
442 */
6708bb27 443 if (!sh) {
c66ac9db 444 if (phv->phv_mode == PHV_LLD_SCSI_HOST_NO) {
6708bb27 445 pr_err("pSCSI: Unable to locate struct"
c66ac9db 446 " Scsi_Host for PHV_LLD_SCSI_HOST_NO\n");
0fd97ccf 447 return -ENODEV;
c66ac9db
NB
448 }
449 /*
e6a8a41a 450 * For the newer PHV_VIRTUAL_HOST_ID struct scsi_device
c66ac9db
NB
451 * reference, we enforce that udev_path has been set
452 */
0fd97ccf 453 if (!(dev->dev_flags & DF_USING_UDEV_PATH)) {
6708bb27 454 pr_err("pSCSI: udev_path attribute has not"
c66ac9db 455 " been set before ENABLE=1\n");
0fd97ccf 456 return -EINVAL;
c66ac9db
NB
457 }
458 /*
e6a8a41a 459 * If no scsi_host_id= was passed for PHV_VIRTUAL_HOST_ID,
c66ac9db
NB
460 * use the original TCM hba ID to reference Linux/SCSI Host No
461 * and enable for PHV_LLD_SCSI_HOST_NO mode.
462 */
463 if (!(pdv->pdv_flags & PDF_HAS_VIRT_HOST_ID)) {
0fd97ccf 464 if (hba->dev_count) {
6708bb27 465 pr_err("pSCSI: Unable to set hba_mode"
c66ac9db 466 " with active devices\n");
0fd97ccf 467 return -EEXIST;
c66ac9db 468 }
c66ac9db
NB
469
470 if (pscsi_pmode_enable_hba(hba, 1) != 1)
0fd97ccf 471 return -ENODEV;
c66ac9db
NB
472
473 legacy_mode_enable = 1;
474 hba->hba_flags |= HBA_FLAGS_PSCSI_MODE;
475 sh = phv->phv_lld_host;
476 } else {
e3d6f909 477 sh = scsi_host_lookup(pdv->pdv_host_id);
58932e96 478 if (!sh) {
6708bb27 479 pr_err("pSCSI: Unable to locate"
c66ac9db 480 " pdv_host_id: %d\n", pdv->pdv_host_id);
58932e96 481 return -EINVAL;
c66ac9db 482 }
5a7125c6 483 pdv->pdv_lld_host = sh;
c66ac9db
NB
484 }
485 } else {
e6a8a41a
SH
486 if (phv->phv_mode == PHV_VIRTUAL_HOST_ID) {
487 pr_err("pSCSI: PHV_VIRTUAL_HOST_ID set while"
c66ac9db 488 " struct Scsi_Host exists\n");
0fd97ccf 489 return -EEXIST;
c66ac9db
NB
490 }
491 }
492
493 spin_lock_irq(sh->host_lock);
494 list_for_each_entry(sd, &sh->__devices, siblings) {
495 if ((pdv->pdv_channel_id != sd->channel) ||
496 (pdv->pdv_target_id != sd->id) ||
497 (pdv->pdv_lun_id != sd->lun))
498 continue;
499 /*
500 * Functions will release the held struct scsi_host->host_lock
e699bb97 501 * before calling pscsi_add_device_to_list() to register
c66ac9db
NB
502 * struct scsi_device with target_core_mod.
503 */
504 switch (sd->type) {
505 case TYPE_DISK:
016a5fec 506 case TYPE_ZBC:
0fd97ccf 507 ret = pscsi_create_type_disk(dev, sd);
c66ac9db 508 break;
c66ac9db 509 default:
a04e54f2 510 ret = pscsi_create_type_nondisk(dev, sd);
c66ac9db
NB
511 break;
512 }
513
0fd97ccf 514 if (ret) {
e6a8a41a 515 if (phv->phv_mode == PHV_VIRTUAL_HOST_ID)
c66ac9db
NB
516 scsi_host_put(sh);
517 else if (legacy_mode_enable) {
518 pscsi_pmode_enable_hba(hba, 0);
519 hba->hba_flags &= ~HBA_FLAGS_PSCSI_MODE;
520 }
521 pdv->pdv_sd = NULL;
0fd97ccf 522 return ret;
c66ac9db 523 }
0fd97ccf 524 return 0;
c66ac9db
NB
525 }
526 spin_unlock_irq(sh->host_lock);
527
6708bb27 528 pr_err("pSCSI: Unable to locate %d:%d:%d:%d\n", sh->host_no,
c66ac9db
NB
529 pdv->pdv_channel_id, pdv->pdv_target_id, pdv->pdv_lun_id);
530
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
0fd97ccf 538 return -ENODEV;
c66ac9db
NB
539}
540
4cc987ea
NB
541static void pscsi_dev_call_rcu(struct rcu_head *p)
542{
543 struct se_device *dev = container_of(p, struct se_device, rcu_head);
544 struct pscsi_dev_virt *pdv = PSCSI_DEV(dev);
545
546 kfree(pdv);
547}
548
0fd97ccf 549static void pscsi_free_device(struct se_device *dev)
92634706
MC
550{
551 call_rcu(&dev->rcu_head, pscsi_dev_call_rcu);
552}
553
554static void pscsi_destroy_device(struct se_device *dev)
c66ac9db 555{
0fd97ccf
CH
556 struct pscsi_dev_virt *pdv = PSCSI_DEV(dev);
557 struct pscsi_hba_virt *phv = dev->se_hba->hba_ptr;
c66ac9db
NB
558 struct scsi_device *sd = pdv->pdv_sd;
559
560 if (sd) {
561 /*
562 * Release exclusive pSCSI internal struct block_device claim for
016a5fec
DLM
563 * struct scsi_device with TYPE_DISK or TYPE_ZBC
564 * from pscsi_create_type_disk()
c66ac9db 565 */
016a5fec 566 if ((sd->type == TYPE_DISK || sd->type == TYPE_ZBC) &&
034f0cf8
CB
567 pdv->pdv_bdev_file) {
568 fput(pdv->pdv_bdev_file);
569 pdv->pdv_bdev_file = NULL;
c66ac9db
NB
570 }
571 /*
572 * For HBA mode PHV_LLD_SCSI_HOST_NO, release the reference
573 * to struct Scsi_Host now.
574 */
575 if ((phv->phv_mode == PHV_LLD_SCSI_HOST_NO) &&
576 (phv->phv_lld_host != NULL))
577 scsi_host_put(phv->phv_lld_host);
5a7125c6
AG
578 else if (pdv->pdv_lld_host)
579 scsi_host_put(pdv->pdv_lld_host);
c66ac9db 580
a04e54f2 581 scsi_device_put(sd);
c66ac9db
NB
582
583 pdv->pdv_sd = NULL;
584 }
c66ac9db
NB
585}
586
dce6ce8c 587static void pscsi_complete_cmd(struct se_cmd *cmd, u8 scsi_status,
8be70a84 588 unsigned char *req_sense, int valid_data)
c66ac9db 589{
0fd97ccf 590 struct pscsi_dev_virt *pdv = PSCSI_DEV(cmd->se_dev);
c66ac9db 591 struct scsi_device *sd = pdv->pdv_sd;
c49ff72c
CH
592 unsigned char *cdb = cmd->priv;
593
1d2a2cd9 594 /*
c49ff72c 595 * Special case for REPORT_LUNs which is emulated and not passed on.
1d2a2cd9 596 */
c49ff72c 597 if (!cdb)
d5829eac 598 return;
c66ac9db 599
c66ac9db
NB
600 /*
601 * Hack to make sure that Write-Protect modepage is set if R/O mode is
602 * forced.
603 */
29a05dee 604 if (!cmd->data_length)
306c11b2
PB
605 goto after_mode_sense;
606
c66ac9db 607 if (((cdb[0] == MODE_SENSE) || (cdb[0] == MODE_SENSE_10)) &&
dce6ce8c 608 scsi_status == SAM_STAT_GOOD) {
29a05dee
NB
609 bool read_only = target_lun_is_rdonly(cmd);
610
611 if (read_only) {
de103c93
CH
612 unsigned char *buf;
613
614 buf = transport_kmap_data_sg(cmd);
fd48c056 615 if (!buf) {
de103c93 616 ; /* XXX: TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE */
c66ac9db 617 } else {
0f99792c
TL
618 if (cdb[0] == MODE_SENSE_10) {
619 if (!(buf[3] & 0x80))
620 buf[3] |= 0x80;
621 } else {
622 if (!(buf[2] & 0x80))
623 buf[2] |= 0x80;
624 }
625
626 transport_kunmap_data_sg(cmd);
c66ac9db
NB
627 }
628 }
629 }
630after_mode_sense:
631
306c11b2 632 if (sd->type != TYPE_TAPE || !cmd->data_length)
c66ac9db
NB
633 goto after_mode_select;
634
635 /*
636 * Hack to correctly obtain the initiator requested blocksize for
637 * TYPE_TAPE. Since this value is dependent upon each tape media,
638 * struct scsi_device->sector_size will not contain the correct value
639 * by default, so we go ahead and set it so
640 * TRANSPORT(dev)->get_blockdev() returns the correct value to the
641 * storage engine.
642 */
643 if (((cdb[0] == MODE_SELECT) || (cdb[0] == MODE_SELECT_10)) &&
dce6ce8c 644 scsi_status == SAM_STAT_GOOD) {
c66ac9db 645 unsigned char *buf;
c66ac9db
NB
646 u16 bdl;
647 u32 blocksize;
648
dce6ce8c 649 buf = sg_virt(&cmd->t_data_sg[0]);
6708bb27
AG
650 if (!buf) {
651 pr_err("Unable to get buf for scatterlist\n");
c66ac9db
NB
652 goto after_mode_select;
653 }
654
655 if (cdb[0] == MODE_SELECT)
a85d667e 656 bdl = buf[3];
c66ac9db 657 else
a85d667e 658 bdl = get_unaligned_be16(&buf[6]);
c66ac9db
NB
659
660 if (!bdl)
661 goto after_mode_select;
662
663 if (cdb[0] == MODE_SELECT)
a85d667e 664 blocksize = get_unaligned_be24(&buf[9]);
c66ac9db 665 else
a85d667e 666 blocksize = get_unaligned_be24(&buf[13]);
c66ac9db
NB
667
668 sd->sector_size = blocksize;
669 }
670after_mode_select:
671
bd813720 672 if (scsi_status == SAM_STAT_CHECK_CONDITION) {
dce6ce8c 673 transport_copy_sense_to_cmd(cmd, req_sense);
bd813720
LD
674
675 /*
676 * check for TAPE device reads with
677 * FM/EOM/ILI set, so that we can get data
678 * back despite framework assumption that a
679 * check condition means there is no data
680 */
8be70a84 681 if (sd->type == TYPE_TAPE && valid_data &&
bd813720
LD
682 cmd->data_direction == DMA_FROM_DEVICE) {
683 /*
684 * is sense data valid, fixed format,
685 * and have FM, EOM, or ILI set?
686 */
687 if (req_sense[0] == 0xf0 && /* valid, fixed format */
688 req_sense[2] & 0xe0 && /* FM, EOM, or ILI */
689 (req_sense[2] & 0xf) == 0) { /* key==NO_SENSE */
690 pr_debug("Tape FM/EOM/ILI status detected. Treat as normal read.\n");
691 cmd->se_cmd_flags |= SCF_TREAT_READ_AS_NORMAL;
692 }
693 }
694 }
c66ac9db
NB
695}
696
c66ac9db
NB
697enum {
698 Opt_scsi_host_id, Opt_scsi_channel_id, Opt_scsi_target_id,
699 Opt_scsi_lun_id, Opt_err
700};
701
702static match_table_t tokens = {
703 {Opt_scsi_host_id, "scsi_host_id=%d"},
704 {Opt_scsi_channel_id, "scsi_channel_id=%d"},
705 {Opt_scsi_target_id, "scsi_target_id=%d"},
706 {Opt_scsi_lun_id, "scsi_lun_id=%d"},
707 {Opt_err, NULL}
708};
709
0fd97ccf
CH
710static ssize_t pscsi_set_configfs_dev_params(struct se_device *dev,
711 const char *page, ssize_t count)
c66ac9db 712{
0fd97ccf
CH
713 struct pscsi_dev_virt *pdv = PSCSI_DEV(dev);
714 struct pscsi_hba_virt *phv = dev->se_hba->hba_ptr;
c66ac9db
NB
715 char *orig, *ptr, *opts;
716 substring_t args[MAX_OPT_ARGS];
717 int ret = 0, arg, token;
718
719 opts = kstrdup(page, GFP_KERNEL);
720 if (!opts)
721 return -ENOMEM;
722
723 orig = opts;
724
90c161b6 725 while ((ptr = strsep(&opts, ",\n")) != NULL) {
c66ac9db
NB
726 if (!*ptr)
727 continue;
728
729 token = match_token(ptr, tokens, args);
730 switch (token) {
731 case Opt_scsi_host_id:
732 if (phv->phv_mode == PHV_LLD_SCSI_HOST_NO) {
6708bb27 733 pr_err("PSCSI[%d]: Unable to accept"
c66ac9db
NB
734 " scsi_host_id while phv_mode =="
735 " PHV_LLD_SCSI_HOST_NO\n",
736 phv->phv_host_id);
737 ret = -EINVAL;
738 goto out;
739 }
ce31c1b0
JE
740 ret = match_int(args, &arg);
741 if (ret)
742 goto out;
c66ac9db 743 pdv->pdv_host_id = arg;
6708bb27 744 pr_debug("PSCSI[%d]: Referencing SCSI Host ID:"
c66ac9db
NB
745 " %d\n", phv->phv_host_id, pdv->pdv_host_id);
746 pdv->pdv_flags |= PDF_HAS_VIRT_HOST_ID;
747 break;
748 case Opt_scsi_channel_id:
ce31c1b0
JE
749 ret = match_int(args, &arg);
750 if (ret)
751 goto out;
c66ac9db 752 pdv->pdv_channel_id = arg;
6708bb27 753 pr_debug("PSCSI[%d]: Referencing SCSI Channel"
c66ac9db
NB
754 " ID: %d\n", phv->phv_host_id,
755 pdv->pdv_channel_id);
756 pdv->pdv_flags |= PDF_HAS_CHANNEL_ID;
757 break;
758 case Opt_scsi_target_id:
ce31c1b0
JE
759 ret = match_int(args, &arg);
760 if (ret)
761 goto out;
c66ac9db 762 pdv->pdv_target_id = arg;
6708bb27 763 pr_debug("PSCSI[%d]: Referencing SCSI Target"
c66ac9db
NB
764 " ID: %d\n", phv->phv_host_id,
765 pdv->pdv_target_id);
766 pdv->pdv_flags |= PDF_HAS_TARGET_ID;
767 break;
768 case Opt_scsi_lun_id:
ce31c1b0
JE
769 ret = match_int(args, &arg);
770 if (ret)
771 goto out;
c66ac9db 772 pdv->pdv_lun_id = arg;
6708bb27 773 pr_debug("PSCSI[%d]: Referencing SCSI LUN ID:"
c66ac9db
NB
774 " %d\n", phv->phv_host_id, pdv->pdv_lun_id);
775 pdv->pdv_flags |= PDF_HAS_LUN_ID;
776 break;
777 default:
778 break;
779 }
780 }
781
782out:
783 kfree(orig);
784 return (!ret) ? count : ret;
785}
786
0fd97ccf 787static ssize_t pscsi_show_configfs_dev_params(struct se_device *dev, char *b)
c66ac9db 788{
0fd97ccf
CH
789 struct pscsi_hba_virt *phv = dev->se_hba->hba_ptr;
790 struct pscsi_dev_virt *pdv = PSCSI_DEV(dev);
c66ac9db
NB
791 struct scsi_device *sd = pdv->pdv_sd;
792 unsigned char host_id[16];
793 ssize_t bl;
c66ac9db 794
e6a8a41a 795 if (phv->phv_mode == PHV_VIRTUAL_HOST_ID)
c66ac9db
NB
796 snprintf(host_id, 16, "%d", pdv->pdv_host_id);
797 else
798 snprintf(host_id, 16, "PHBA Mode");
799
800 bl = sprintf(b, "SCSI Device Bus Location:"
801 " Channel ID: %d Target ID: %d LUN: %d Host ID: %s\n",
802 pdv->pdv_channel_id, pdv->pdv_target_id, pdv->pdv_lun_id,
803 host_id);
804
805 if (sd) {
b2da4abf
DD
806 bl += sprintf(b + bl, " Vendor: %."
807 __stringify(INQUIRY_VENDOR_LEN) "s", sd->vendor);
808 bl += sprintf(b + bl, " Model: %."
809 __stringify(INQUIRY_MODEL_LEN) "s", sd->model);
810 bl += sprintf(b + bl, " Rev: %."
811 __stringify(INQUIRY_REVISION_LEN) "s\n", sd->rev);
c66ac9db
NB
812 }
813 return bl;
814}
815
4246a0b6 816static void pscsi_bi_endio(struct bio *bio)
c66ac9db 817{
066ff571
CH
818 bio_uninit(bio);
819 kfree(bio);
c66ac9db
NB
820}
821
de103c93
CH
822static sense_reason_t
823pscsi_map_sg(struct se_cmd *cmd, struct scatterlist *sgl, u32 sgl_nents,
dd9cf046 824 struct request *req)
c66ac9db 825{
0fd97ccf 826 struct pscsi_dev_virt *pdv = PSCSI_DEV(cmd->se_dev);
dd9cf046 827 struct bio *bio = NULL;
c66ac9db
NB
828 struct page *page;
829 struct scatterlist *sg;
7a83aa4e 830 u32 data_len = cmd->data_length, i, len, bytes, off;
5787cacd 831 int nr_pages = (cmd->data_length + sgl[0].offset +
c66ac9db 832 PAGE_SIZE - 1) >> PAGE_SHIFT;
03e98c9e 833 int nr_vecs = 0, rc;
dd9cf046 834 int rw = (cmd->data_direction == DMA_TO_DEVICE);
c66ac9db 835
dd9cf046 836 BUG_ON(!cmd->data_length);
02b1a746 837
6708bb27 838 pr_debug("PSCSI: nr_pages: %d\n", nr_pages);
c66ac9db 839
5787cacd 840 for_each_sg(sgl, sg, sgl_nents, i) {
c66ac9db
NB
841 page = sg_page(sg);
842 off = sg->offset;
843 len = sg->length;
844
6708bb27 845 pr_debug("PSCSI: i: %d page: %p len: %d off: %d\n", i,
c66ac9db
NB
846 page, len, off);
847
8f27d487
AH
848 /*
849 * We only have one page of data in each sg element,
850 * we can not cross a page boundary.
851 */
852 if (off + len > PAGE_SIZE)
853 goto fail;
854
855 if (len > 0 && data_len > 0) {
c66ac9db
NB
856 bytes = min_t(unsigned int, len, PAGE_SIZE - off);
857 bytes = min(bytes, data_len);
858
6708bb27 859 if (!bio) {
8e1ceafe 860new_bio:
5f7136db 861 nr_vecs = bio_max_segs(nr_pages);
066ff571 862 bio = bio_kmalloc(nr_vecs, GFP_KERNEL);
6708bb27 863 if (!bio)
c66ac9db 864 goto fail;
066ff571
CH
865 bio_init(bio, NULL, bio->bi_inline_vecs, nr_vecs,
866 rw ? REQ_OP_WRITE : REQ_OP_READ);
7655db80 867 bio->bi_end_io = pscsi_bi_endio;
c66ac9db 868
6708bb27 869 pr_debug("PSCSI: Allocated bio: %p,"
c66ac9db
NB
870 " dir: %s nr_vecs: %d\n", bio,
871 (rw) ? "rw" : "r", nr_vecs);
c66ac9db
NB
872 }
873
6708bb27 874 pr_debug("PSCSI: Calling bio_add_pc_page() i: %d"
c66ac9db
NB
875 " bio: %p page: %p len: %d off: %d\n", i, bio,
876 page, len, off);
877
878 rc = bio_add_pc_page(pdv->pdv_sd->request_queue,
879 bio, page, bytes, off);
6708bb27 880 pr_debug("PSCSI: bio->bi_vcnt: %d nr_vecs: %d\n",
84c85906
ML
881 bio_segments(bio), nr_vecs);
882 if (rc != bytes) {
6708bb27 883 pr_debug("PSCSI: Reached bio->bi_vcnt max:"
c66ac9db
NB
884 " %d i: %d bio: %p, allocating another"
885 " bio\n", bio->bi_vcnt, i, bio);
dd9cf046 886
393bb12e 887 rc = blk_rq_append_bio(req, bio);
dd9cf046
CH
888 if (rc) {
889 pr_err("pSCSI: failed to append bio\n");
890 goto fail;
891 }
892
8e1ceafe 893 goto new_bio;
c66ac9db
NB
894 }
895
c66ac9db 896 data_len -= bytes;
c66ac9db
NB
897 }
898 }
c66ac9db 899
dd9cf046 900 if (bio) {
393bb12e 901 rc = blk_rq_append_bio(req, bio);
dd9cf046
CH
902 if (rc) {
903 pr_err("pSCSI: failed to append bio\n");
904 goto fail;
905 }
906 }
907
de103c93 908 return 0;
c66ac9db 909fail:
de959094
NA
910 if (bio) {
911 bio_uninit(bio);
912 kfree(bio);
913 }
36fa766f
MW
914 while (req->bio) {
915 bio = req->bio;
916 req->bio = bio->bi_next;
de959094
NA
917 bio_uninit(bio);
918 kfree(bio);
36fa766f
MW
919 }
920 req->biotail = NULL;
de103c93 921 return TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE;
c66ac9db
NB
922}
923
de103c93
CH
924static sense_reason_t
925pscsi_parse_cdb(struct se_cmd *cmd)
d6e0175c 926{
de103c93
CH
927 if (cmd->se_cmd_flags & SCF_BIDI)
928 return TCM_UNSUPPORTED_SCSI_OPCODE;
d6e0175c 929
7bfea53b 930 return passthrough_parse_cdb(cmd, pscsi_execute_cmd);
d6e0175c
CH
931}
932
de103c93
CH
933static sense_reason_t
934pscsi_execute_cmd(struct se_cmd *cmd)
c66ac9db 935{
0c2ad7d1
CH
936 struct scatterlist *sgl = cmd->t_data_sg;
937 u32 sgl_nents = cmd->t_data_nents;
0fd97ccf 938 struct pscsi_dev_virt *pdv = PSCSI_DEV(cmd->se_dev);
ce70fd9a 939 struct scsi_cmnd *scmd;
02b1a746 940 struct request *req;
de103c93 941 sense_reason_t ret;
c66ac9db 942
68ec3b81 943 req = scsi_alloc_request(pdv->pdv_sd->request_queue,
aebf526b 944 cmd->data_direction == DMA_TO_DEVICE ?
da6269da 945 REQ_OP_DRV_OUT : REQ_OP_DRV_IN, 0);
c49ff72c
CH
946 if (IS_ERR(req))
947 return TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE;
f27b087b 948
dd9cf046
CH
949 if (sgl) {
950 ret = pscsi_map_sg(cmd, sgl, sgl_nents, req);
de103c93 951 if (ret)
dd9cf046 952 goto fail_put_request;
c66ac9db
NB
953 }
954
02b1a746 955 req->end_io = pscsi_req_done;
5787cacd 956 req->end_io_data = cmd;
ce70fd9a
CH
957
958 scmd = blk_mq_rq_to_pdu(req);
959 scmd->cmd_len = scsi_command_size(cmd->t_task_cdb);
960 if (scmd->cmd_len > sizeof(scmd->cmnd)) {
c49ff72c
CH
961 ret = TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE;
962 goto fail_put_request;
963 }
ce70fd9a
CH
964 memcpy(scmd->cmnd, cmd->t_task_cdb, scmd->cmd_len);
965
016a5fec
DLM
966 if (pdv->pdv_sd->type == TYPE_DISK ||
967 pdv->pdv_sd->type == TYPE_ZBC)
02b1a746
CH
968 req->timeout = PS_TIMEOUT_DISK;
969 else
970 req->timeout = PS_TIMEOUT_OTHER;
6aded12b 971 scmd->allowed = PS_RETRY;
c66ac9db 972
ce70fd9a 973 cmd->priv = scmd->cmnd;
c66ac9db 974
e2e53086 975 blk_execute_rq_nowait(req, cmd->sam_task_attr == TCM_HEAD_TAG);
02b1a746 976
03e98c9e 977 return 0;
02b1a746 978
dd9cf046 979fail_put_request:
0bf6d96c 980 blk_mq_free_request(req);
de103c93 981 return ret;
c66ac9db
NB
982}
983
c66ac9db
NB
984/* pscsi_get_device_type():
985 *
986 *
987 */
988static u32 pscsi_get_device_type(struct se_device *dev)
989{
0fd97ccf 990 struct pscsi_dev_virt *pdv = PSCSI_DEV(dev);
c66ac9db
NB
991 struct scsi_device *sd = pdv->pdv_sd;
992
215a8fe4 993 return (sd) ? sd->type : TYPE_NO_LUN;
c66ac9db
NB
994}
995
996static sector_t pscsi_get_blocks(struct se_device *dev)
997{
0fd97ccf 998 struct pscsi_dev_virt *pdv = PSCSI_DEV(dev);
c66ac9db 999
034f0cf8
CB
1000 if (pdv->pdv_bdev_file)
1001 return bdev_nr_sectors(file_bdev(pdv->pdv_bdev_file));
c66ac9db
NB
1002 return 0;
1003}
1004
de671d61
JA
1005static enum rq_end_io_ret pscsi_req_done(struct request *req,
1006 blk_status_t status)
c66ac9db 1007{
5787cacd 1008 struct se_cmd *cmd = req->end_io_data;
5b794f98 1009 struct scsi_cmnd *scmd = blk_mq_rq_to_pdu(req);
dbb4c84d 1010 enum sam_status scsi_status = scmd->result & 0xff;
8be70a84 1011 int valid_data = cmd->data_length - scmd->resid_len;
c49ff72c 1012 u8 *cdb = cmd->priv;
5787cacd 1013
15df85e0 1014 if (scsi_status != SAM_STAT_GOOD) {
5787cacd 1015 pr_debug("PSCSI Status Byte exception at cmd: %p CDB:"
dbb4c84d 1016 " 0x%02x Result: 0x%08x\n", cmd, cdb[0], scmd->result);
c66ac9db
NB
1017 }
1018
8be70a84 1019 pscsi_complete_cmd(cmd, scsi_status, scmd->sense_buffer, valid_data);
dce6ce8c 1020
dbb4c84d 1021 switch (host_byte(scmd->result)) {
c66ac9db 1022 case DID_OK:
8be70a84 1023 target_complete_cmd_with_length(cmd, scsi_status, valid_data);
c66ac9db
NB
1024 break;
1025 default:
5787cacd 1026 pr_debug("PSCSI Host Byte exception at cmd: %p CDB:"
dbb4c84d 1027 " 0x%02x Result: 0x%08x\n", cmd, cdb[0], scmd->result);
5787cacd 1028 target_complete_cmd(cmd, SAM_STAT_CHECK_CONDITION);
c66ac9db
NB
1029 break;
1030 }
c66ac9db 1031
0bf6d96c 1032 blk_mq_free_request(req);
de671d61 1033 return RQ_END_IO_NONE;
c66ac9db
NB
1034}
1035
0a06d430 1036static const struct target_backend_ops pscsi_ops = {
c66ac9db
NB
1037 .name = "pscsi",
1038 .owner = THIS_MODULE,
69088a04
BS
1039 .transport_flags_default = TRANSPORT_FLAG_PASSTHROUGH |
1040 TRANSPORT_FLAG_PASSTHROUGH_ALUA |
1041 TRANSPORT_FLAG_PASSTHROUGH_PGR,
c66ac9db
NB
1042 .attach_hba = pscsi_attach_hba,
1043 .detach_hba = pscsi_detach_hba,
1044 .pmode_enable_hba = pscsi_pmode_enable_hba,
0fd97ccf
CH
1045 .alloc_device = pscsi_alloc_device,
1046 .configure_device = pscsi_configure_device,
92634706 1047 .destroy_device = pscsi_destroy_device,
c66ac9db 1048 .free_device = pscsi_free_device,
d6e0175c 1049 .parse_cdb = pscsi_parse_cdb,
c66ac9db
NB
1050 .set_configfs_dev_params = pscsi_set_configfs_dev_params,
1051 .show_configfs_dev_params = pscsi_show_configfs_dev_params,
c66ac9db
NB
1052 .get_device_type = pscsi_get_device_type,
1053 .get_blocks = pscsi_get_blocks,
5873c4d1 1054 .tb_dev_attrib_attrs = passthrough_attrib_attrs,
c66ac9db
NB
1055};
1056
1057static int __init pscsi_module_init(void)
1058{
0a06d430 1059 return transport_backend_register(&pscsi_ops);
c66ac9db
NB
1060}
1061
63b91d5a 1062static void __exit pscsi_module_exit(void)
c66ac9db 1063{
0a06d430 1064 target_backend_unregister(&pscsi_ops);
c66ac9db
NB
1065}
1066
1067MODULE_DESCRIPTION("TCM PSCSI subsystem plugin");
1068MODULE_AUTHOR("nab@Linux-iSCSI.org");
1069MODULE_LICENSE("GPL");
1070
1071module_init(pscsi_module_init);
1072module_exit(pscsi_module_exit);