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Merge tag 'v3.8-rc7' into regulator-core
[deliverable/linux.git] / drivers / target / target_core_spc.c
1 /*
2 * SCSI Primary Commands (SPC) parsing and emulation.
3 *
4 * (c) Copyright 2002-2012 RisingTide Systems LLC.
5 *
6 * Nicholas A. Bellinger <nab@kernel.org>
7 *
8 * This program is free software; you can redistribute it and/or modify
9 * it under the terms of the GNU General Public License as published by
10 * the Free Software Foundation; either version 2 of the License, or
11 * (at your option) any later version.
12 *
13 * This program is distributed in the hope that it will be useful,
14 * but WITHOUT ANY WARRANTY; without even the implied warranty of
15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 * GNU General Public License for more details.
17 *
18 * You should have received a copy of the GNU General Public License
19 * along with this program; if not, write to the Free Software
20 * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
21 */
22
23 #include <linux/kernel.h>
24 #include <linux/module.h>
25 #include <asm/unaligned.h>
26
27 #include <scsi/scsi.h>
28 #include <scsi/scsi_tcq.h>
29
30 #include <target/target_core_base.h>
31 #include <target/target_core_backend.h>
32 #include <target/target_core_fabric.h>
33
34 #include "target_core_internal.h"
35 #include "target_core_alua.h"
36 #include "target_core_pr.h"
37 #include "target_core_ua.h"
38
39
40 static void spc_fill_alua_data(struct se_port *port, unsigned char *buf)
41 {
42 struct t10_alua_tg_pt_gp *tg_pt_gp;
43 struct t10_alua_tg_pt_gp_member *tg_pt_gp_mem;
44
45 /*
46 * Set SCCS for MAINTENANCE_IN + REPORT_TARGET_PORT_GROUPS.
47 */
48 buf[5] = 0x80;
49
50 /*
51 * Set TPGS field for explict and/or implict ALUA access type
52 * and opteration.
53 *
54 * See spc4r17 section 6.4.2 Table 135
55 */
56 if (!port)
57 return;
58 tg_pt_gp_mem = port->sep_alua_tg_pt_gp_mem;
59 if (!tg_pt_gp_mem)
60 return;
61
62 spin_lock(&tg_pt_gp_mem->tg_pt_gp_mem_lock);
63 tg_pt_gp = tg_pt_gp_mem->tg_pt_gp;
64 if (tg_pt_gp)
65 buf[5] |= tg_pt_gp->tg_pt_gp_alua_access_type;
66 spin_unlock(&tg_pt_gp_mem->tg_pt_gp_mem_lock);
67 }
68
69 static sense_reason_t
70 spc_emulate_inquiry_std(struct se_cmd *cmd, char *buf)
71 {
72 struct se_lun *lun = cmd->se_lun;
73 struct se_device *dev = cmd->se_dev;
74
75 /* Set RMB (removable media) for tape devices */
76 if (dev->transport->get_device_type(dev) == TYPE_TAPE)
77 buf[1] = 0x80;
78
79 buf[2] = 0x05; /* SPC-3 */
80
81 /*
82 * NORMACA and HISUP = 0, RESPONSE DATA FORMAT = 2
83 *
84 * SPC4 says:
85 * A RESPONSE DATA FORMAT field set to 2h indicates that the
86 * standard INQUIRY data is in the format defined in this
87 * standard. Response data format values less than 2h are
88 * obsolete. Response data format values greater than 2h are
89 * reserved.
90 */
91 buf[3] = 2;
92
93 /*
94 * Enable SCCS and TPGS fields for Emulated ALUA
95 */
96 spc_fill_alua_data(lun->lun_sep, buf);
97
98 buf[7] = 0x2; /* CmdQue=1 */
99
100 snprintf(&buf[8], 8, "LIO-ORG");
101 snprintf(&buf[16], 16, "%s", dev->t10_wwn.model);
102 snprintf(&buf[32], 4, "%s", dev->t10_wwn.revision);
103 buf[4] = 31; /* Set additional length to 31 */
104
105 return 0;
106 }
107
108 /* unit serial number */
109 static sense_reason_t
110 spc_emulate_evpd_80(struct se_cmd *cmd, unsigned char *buf)
111 {
112 struct se_device *dev = cmd->se_dev;
113 u16 len = 0;
114
115 if (dev->dev_flags & DF_EMULATED_VPD_UNIT_SERIAL) {
116 u32 unit_serial_len;
117
118 unit_serial_len = strlen(dev->t10_wwn.unit_serial);
119 unit_serial_len++; /* For NULL Terminator */
120
121 len += sprintf(&buf[4], "%s", dev->t10_wwn.unit_serial);
122 len++; /* Extra Byte for NULL Terminator */
123 buf[3] = len;
124 }
125 return 0;
126 }
127
128 static void spc_parse_naa_6h_vendor_specific(struct se_device *dev,
129 unsigned char *buf)
130 {
131 unsigned char *p = &dev->t10_wwn.unit_serial[0];
132 int cnt;
133 bool next = true;
134
135 /*
136 * Generate up to 36 bits of VENDOR SPECIFIC IDENTIFIER starting on
137 * byte 3 bit 3-0 for NAA IEEE Registered Extended DESIGNATOR field
138 * format, followed by 64 bits of VENDOR SPECIFIC IDENTIFIER EXTENSION
139 * to complete the payload. These are based from VPD=0x80 PRODUCT SERIAL
140 * NUMBER set via vpd_unit_serial in target_core_configfs.c to ensure
141 * per device uniqeness.
142 */
143 for (cnt = 0; *p && cnt < 13; p++) {
144 int val = hex_to_bin(*p);
145
146 if (val < 0)
147 continue;
148
149 if (next) {
150 next = false;
151 buf[cnt++] |= val;
152 } else {
153 next = true;
154 buf[cnt] = val << 4;
155 }
156 }
157 }
158
159 /*
160 * Device identification VPD, for a complete list of
161 * DESIGNATOR TYPEs see spc4r17 Table 459.
162 */
163 static sense_reason_t
164 spc_emulate_evpd_83(struct se_cmd *cmd, unsigned char *buf)
165 {
166 struct se_device *dev = cmd->se_dev;
167 struct se_lun *lun = cmd->se_lun;
168 struct se_port *port = NULL;
169 struct se_portal_group *tpg = NULL;
170 struct t10_alua_lu_gp_member *lu_gp_mem;
171 struct t10_alua_tg_pt_gp *tg_pt_gp;
172 struct t10_alua_tg_pt_gp_member *tg_pt_gp_mem;
173 unsigned char *prod = &dev->t10_wwn.model[0];
174 u32 prod_len;
175 u32 unit_serial_len, off = 0;
176 u16 len = 0, id_len;
177
178 off = 4;
179
180 /*
181 * NAA IEEE Registered Extended Assigned designator format, see
182 * spc4r17 section 7.7.3.6.5
183 *
184 * We depend upon a target_core_mod/ConfigFS provided
185 * /sys/kernel/config/target/core/$HBA/$DEV/wwn/vpd_unit_serial
186 * value in order to return the NAA id.
187 */
188 if (!(dev->dev_flags & DF_EMULATED_VPD_UNIT_SERIAL))
189 goto check_t10_vend_desc;
190
191 /* CODE SET == Binary */
192 buf[off++] = 0x1;
193
194 /* Set ASSOCIATION == addressed logical unit: 0)b */
195 buf[off] = 0x00;
196
197 /* Identifier/Designator type == NAA identifier */
198 buf[off++] |= 0x3;
199 off++;
200
201 /* Identifier/Designator length */
202 buf[off++] = 0x10;
203
204 /*
205 * Start NAA IEEE Registered Extended Identifier/Designator
206 */
207 buf[off++] = (0x6 << 4);
208
209 /*
210 * Use OpenFabrics IEEE Company ID: 00 14 05
211 */
212 buf[off++] = 0x01;
213 buf[off++] = 0x40;
214 buf[off] = (0x5 << 4);
215
216 /*
217 * Return ConfigFS Unit Serial Number information for
218 * VENDOR_SPECIFIC_IDENTIFIER and
219 * VENDOR_SPECIFIC_IDENTIFIER_EXTENTION
220 */
221 spc_parse_naa_6h_vendor_specific(dev, &buf[off]);
222
223 len = 20;
224 off = (len + 4);
225
226 check_t10_vend_desc:
227 /*
228 * T10 Vendor Identifier Page, see spc4r17 section 7.7.3.4
229 */
230 id_len = 8; /* For Vendor field */
231 prod_len = 4; /* For VPD Header */
232 prod_len += 8; /* For Vendor field */
233 prod_len += strlen(prod);
234 prod_len++; /* For : */
235
236 if (dev->dev_flags & DF_EMULATED_VPD_UNIT_SERIAL) {
237 unit_serial_len = strlen(&dev->t10_wwn.unit_serial[0]);
238 unit_serial_len++; /* For NULL Terminator */
239
240 id_len += sprintf(&buf[off+12], "%s:%s", prod,
241 &dev->t10_wwn.unit_serial[0]);
242 }
243 buf[off] = 0x2; /* ASCII */
244 buf[off+1] = 0x1; /* T10 Vendor ID */
245 buf[off+2] = 0x0;
246 memcpy(&buf[off+4], "LIO-ORG", 8);
247 /* Extra Byte for NULL Terminator */
248 id_len++;
249 /* Identifier Length */
250 buf[off+3] = id_len;
251 /* Header size for Designation descriptor */
252 len += (id_len + 4);
253 off += (id_len + 4);
254 /*
255 * struct se_port is only set for INQUIRY VPD=1 through $FABRIC_MOD
256 */
257 port = lun->lun_sep;
258 if (port) {
259 struct t10_alua_lu_gp *lu_gp;
260 u32 padding, scsi_name_len;
261 u16 lu_gp_id = 0;
262 u16 tg_pt_gp_id = 0;
263 u16 tpgt;
264
265 tpg = port->sep_tpg;
266 /*
267 * Relative target port identifer, see spc4r17
268 * section 7.7.3.7
269 *
270 * Get the PROTOCOL IDENTIFIER as defined by spc4r17
271 * section 7.5.1 Table 362
272 */
273 buf[off] =
274 (tpg->se_tpg_tfo->get_fabric_proto_ident(tpg) << 4);
275 buf[off++] |= 0x1; /* CODE SET == Binary */
276 buf[off] = 0x80; /* Set PIV=1 */
277 /* Set ASSOCIATION == target port: 01b */
278 buf[off] |= 0x10;
279 /* DESIGNATOR TYPE == Relative target port identifer */
280 buf[off++] |= 0x4;
281 off++; /* Skip over Reserved */
282 buf[off++] = 4; /* DESIGNATOR LENGTH */
283 /* Skip over Obsolete field in RTPI payload
284 * in Table 472 */
285 off += 2;
286 buf[off++] = ((port->sep_rtpi >> 8) & 0xff);
287 buf[off++] = (port->sep_rtpi & 0xff);
288 len += 8; /* Header size + Designation descriptor */
289 /*
290 * Target port group identifier, see spc4r17
291 * section 7.7.3.8
292 *
293 * Get the PROTOCOL IDENTIFIER as defined by spc4r17
294 * section 7.5.1 Table 362
295 */
296 tg_pt_gp_mem = port->sep_alua_tg_pt_gp_mem;
297 if (!tg_pt_gp_mem)
298 goto check_lu_gp;
299
300 spin_lock(&tg_pt_gp_mem->tg_pt_gp_mem_lock);
301 tg_pt_gp = tg_pt_gp_mem->tg_pt_gp;
302 if (!tg_pt_gp) {
303 spin_unlock(&tg_pt_gp_mem->tg_pt_gp_mem_lock);
304 goto check_lu_gp;
305 }
306 tg_pt_gp_id = tg_pt_gp->tg_pt_gp_id;
307 spin_unlock(&tg_pt_gp_mem->tg_pt_gp_mem_lock);
308
309 buf[off] =
310 (tpg->se_tpg_tfo->get_fabric_proto_ident(tpg) << 4);
311 buf[off++] |= 0x1; /* CODE SET == Binary */
312 buf[off] = 0x80; /* Set PIV=1 */
313 /* Set ASSOCIATION == target port: 01b */
314 buf[off] |= 0x10;
315 /* DESIGNATOR TYPE == Target port group identifier */
316 buf[off++] |= 0x5;
317 off++; /* Skip over Reserved */
318 buf[off++] = 4; /* DESIGNATOR LENGTH */
319 off += 2; /* Skip over Reserved Field */
320 buf[off++] = ((tg_pt_gp_id >> 8) & 0xff);
321 buf[off++] = (tg_pt_gp_id & 0xff);
322 len += 8; /* Header size + Designation descriptor */
323 /*
324 * Logical Unit Group identifier, see spc4r17
325 * section 7.7.3.8
326 */
327 check_lu_gp:
328 lu_gp_mem = dev->dev_alua_lu_gp_mem;
329 if (!lu_gp_mem)
330 goto check_scsi_name;
331
332 spin_lock(&lu_gp_mem->lu_gp_mem_lock);
333 lu_gp = lu_gp_mem->lu_gp;
334 if (!lu_gp) {
335 spin_unlock(&lu_gp_mem->lu_gp_mem_lock);
336 goto check_scsi_name;
337 }
338 lu_gp_id = lu_gp->lu_gp_id;
339 spin_unlock(&lu_gp_mem->lu_gp_mem_lock);
340
341 buf[off++] |= 0x1; /* CODE SET == Binary */
342 /* DESIGNATOR TYPE == Logical Unit Group identifier */
343 buf[off++] |= 0x6;
344 off++; /* Skip over Reserved */
345 buf[off++] = 4; /* DESIGNATOR LENGTH */
346 off += 2; /* Skip over Reserved Field */
347 buf[off++] = ((lu_gp_id >> 8) & 0xff);
348 buf[off++] = (lu_gp_id & 0xff);
349 len += 8; /* Header size + Designation descriptor */
350 /*
351 * SCSI name string designator, see spc4r17
352 * section 7.7.3.11
353 *
354 * Get the PROTOCOL IDENTIFIER as defined by spc4r17
355 * section 7.5.1 Table 362
356 */
357 check_scsi_name:
358 scsi_name_len = strlen(tpg->se_tpg_tfo->tpg_get_wwn(tpg));
359 /* UTF-8 ",t,0x<16-bit TPGT>" + NULL Terminator */
360 scsi_name_len += 10;
361 /* Check for 4-byte padding */
362 padding = ((-scsi_name_len) & 3);
363 if (padding != 0)
364 scsi_name_len += padding;
365 /* Header size + Designation descriptor */
366 scsi_name_len += 4;
367
368 buf[off] =
369 (tpg->se_tpg_tfo->get_fabric_proto_ident(tpg) << 4);
370 buf[off++] |= 0x3; /* CODE SET == UTF-8 */
371 buf[off] = 0x80; /* Set PIV=1 */
372 /* Set ASSOCIATION == target port: 01b */
373 buf[off] |= 0x10;
374 /* DESIGNATOR TYPE == SCSI name string */
375 buf[off++] |= 0x8;
376 off += 2; /* Skip over Reserved and length */
377 /*
378 * SCSI name string identifer containing, $FABRIC_MOD
379 * dependent information. For LIO-Target and iSCSI
380 * Target Port, this means "<iSCSI name>,t,0x<TPGT> in
381 * UTF-8 encoding.
382 */
383 tpgt = tpg->se_tpg_tfo->tpg_get_tag(tpg);
384 scsi_name_len = sprintf(&buf[off], "%s,t,0x%04x",
385 tpg->se_tpg_tfo->tpg_get_wwn(tpg), tpgt);
386 scsi_name_len += 1 /* Include NULL terminator */;
387 /*
388 * The null-terminated, null-padded (see 4.4.2) SCSI
389 * NAME STRING field contains a UTF-8 format string.
390 * The number of bytes in the SCSI NAME STRING field
391 * (i.e., the value in the DESIGNATOR LENGTH field)
392 * shall be no larger than 256 and shall be a multiple
393 * of four.
394 */
395 if (padding)
396 scsi_name_len += padding;
397
398 buf[off-1] = scsi_name_len;
399 off += scsi_name_len;
400 /* Header size + Designation descriptor */
401 len += (scsi_name_len + 4);
402 }
403 buf[2] = ((len >> 8) & 0xff);
404 buf[3] = (len & 0xff); /* Page Length for VPD 0x83 */
405 return 0;
406 }
407
408 /* Extended INQUIRY Data VPD Page */
409 static sense_reason_t
410 spc_emulate_evpd_86(struct se_cmd *cmd, unsigned char *buf)
411 {
412 buf[3] = 0x3c;
413 /* Set HEADSUP, ORDSUP, SIMPSUP */
414 buf[5] = 0x07;
415
416 /* If WriteCache emulation is enabled, set V_SUP */
417 if (cmd->se_dev->dev_attrib.emulate_write_cache > 0)
418 buf[6] = 0x01;
419 return 0;
420 }
421
422 /* Block Limits VPD page */
423 static sense_reason_t
424 spc_emulate_evpd_b0(struct se_cmd *cmd, unsigned char *buf)
425 {
426 struct se_device *dev = cmd->se_dev;
427 u32 max_sectors;
428 int have_tp = 0;
429
430 /*
431 * Following spc3r22 section 6.5.3 Block Limits VPD page, when
432 * emulate_tpu=1 or emulate_tpws=1 we will be expect a
433 * different page length for Thin Provisioning.
434 */
435 if (dev->dev_attrib.emulate_tpu || dev->dev_attrib.emulate_tpws)
436 have_tp = 1;
437
438 buf[0] = dev->transport->get_device_type(dev);
439 buf[3] = have_tp ? 0x3c : 0x10;
440
441 /* Set WSNZ to 1 */
442 buf[4] = 0x01;
443
444 /*
445 * Set OPTIMAL TRANSFER LENGTH GRANULARITY
446 */
447 put_unaligned_be16(1, &buf[6]);
448
449 /*
450 * Set MAXIMUM TRANSFER LENGTH
451 */
452 max_sectors = min(dev->dev_attrib.fabric_max_sectors,
453 dev->dev_attrib.hw_max_sectors);
454 put_unaligned_be32(max_sectors, &buf[8]);
455
456 /*
457 * Set OPTIMAL TRANSFER LENGTH
458 */
459 put_unaligned_be32(dev->dev_attrib.optimal_sectors, &buf[12]);
460
461 /*
462 * Exit now if we don't support TP.
463 */
464 if (!have_tp)
465 goto max_write_same;
466
467 /*
468 * Set MAXIMUM UNMAP LBA COUNT
469 */
470 put_unaligned_be32(dev->dev_attrib.max_unmap_lba_count, &buf[20]);
471
472 /*
473 * Set MAXIMUM UNMAP BLOCK DESCRIPTOR COUNT
474 */
475 put_unaligned_be32(dev->dev_attrib.max_unmap_block_desc_count,
476 &buf[24]);
477
478 /*
479 * Set OPTIMAL UNMAP GRANULARITY
480 */
481 put_unaligned_be32(dev->dev_attrib.unmap_granularity, &buf[28]);
482
483 /*
484 * UNMAP GRANULARITY ALIGNMENT
485 */
486 put_unaligned_be32(dev->dev_attrib.unmap_granularity_alignment,
487 &buf[32]);
488 if (dev->dev_attrib.unmap_granularity_alignment != 0)
489 buf[32] |= 0x80; /* Set the UGAVALID bit */
490
491 /*
492 * MAXIMUM WRITE SAME LENGTH
493 */
494 max_write_same:
495 put_unaligned_be64(dev->dev_attrib.max_write_same_len, &buf[36]);
496
497 return 0;
498 }
499
500 /* Block Device Characteristics VPD page */
501 static sense_reason_t
502 spc_emulate_evpd_b1(struct se_cmd *cmd, unsigned char *buf)
503 {
504 struct se_device *dev = cmd->se_dev;
505
506 buf[0] = dev->transport->get_device_type(dev);
507 buf[3] = 0x3c;
508 buf[5] = dev->dev_attrib.is_nonrot ? 1 : 0;
509
510 return 0;
511 }
512
513 /* Thin Provisioning VPD */
514 static sense_reason_t
515 spc_emulate_evpd_b2(struct se_cmd *cmd, unsigned char *buf)
516 {
517 struct se_device *dev = cmd->se_dev;
518
519 /*
520 * From spc3r22 section 6.5.4 Thin Provisioning VPD page:
521 *
522 * The PAGE LENGTH field is defined in SPC-4. If the DP bit is set to
523 * zero, then the page length shall be set to 0004h. If the DP bit
524 * is set to one, then the page length shall be set to the value
525 * defined in table 162.
526 */
527 buf[0] = dev->transport->get_device_type(dev);
528
529 /*
530 * Set Hardcoded length mentioned above for DP=0
531 */
532 put_unaligned_be16(0x0004, &buf[2]);
533
534 /*
535 * The THRESHOLD EXPONENT field indicates the threshold set size in
536 * LBAs as a power of 2 (i.e., the threshold set size is equal to
537 * 2(threshold exponent)).
538 *
539 * Note that this is currently set to 0x00 as mkp says it will be
540 * changing again. We can enable this once it has settled in T10
541 * and is actually used by Linux/SCSI ML code.
542 */
543 buf[4] = 0x00;
544
545 /*
546 * A TPU bit set to one indicates that the device server supports
547 * the UNMAP command (see 5.25). A TPU bit set to zero indicates
548 * that the device server does not support the UNMAP command.
549 */
550 if (dev->dev_attrib.emulate_tpu != 0)
551 buf[5] = 0x80;
552
553 /*
554 * A TPWS bit set to one indicates that the device server supports
555 * the use of the WRITE SAME (16) command (see 5.42) to unmap LBAs.
556 * A TPWS bit set to zero indicates that the device server does not
557 * support the use of the WRITE SAME (16) command to unmap LBAs.
558 */
559 if (dev->dev_attrib.emulate_tpws != 0)
560 buf[5] |= 0x40;
561
562 return 0;
563 }
564
565 static sense_reason_t
566 spc_emulate_evpd_00(struct se_cmd *cmd, unsigned char *buf);
567
568 static struct {
569 uint8_t page;
570 sense_reason_t (*emulate)(struct se_cmd *, unsigned char *);
571 } evpd_handlers[] = {
572 { .page = 0x00, .emulate = spc_emulate_evpd_00 },
573 { .page = 0x80, .emulate = spc_emulate_evpd_80 },
574 { .page = 0x83, .emulate = spc_emulate_evpd_83 },
575 { .page = 0x86, .emulate = spc_emulate_evpd_86 },
576 { .page = 0xb0, .emulate = spc_emulate_evpd_b0 },
577 { .page = 0xb1, .emulate = spc_emulate_evpd_b1 },
578 { .page = 0xb2, .emulate = spc_emulate_evpd_b2 },
579 };
580
581 /* supported vital product data pages */
582 static sense_reason_t
583 spc_emulate_evpd_00(struct se_cmd *cmd, unsigned char *buf)
584 {
585 int p;
586
587 /*
588 * Only report the INQUIRY EVPD=1 pages after a valid NAA
589 * Registered Extended LUN WWN has been set via ConfigFS
590 * during device creation/restart.
591 */
592 if (cmd->se_dev->dev_flags & DF_EMULATED_VPD_UNIT_SERIAL) {
593 buf[3] = ARRAY_SIZE(evpd_handlers);
594 for (p = 0; p < ARRAY_SIZE(evpd_handlers); ++p)
595 buf[p + 4] = evpd_handlers[p].page;
596 }
597
598 return 0;
599 }
600
601 static sense_reason_t
602 spc_emulate_inquiry(struct se_cmd *cmd)
603 {
604 struct se_device *dev = cmd->se_dev;
605 struct se_portal_group *tpg = cmd->se_lun->lun_sep->sep_tpg;
606 unsigned char *rbuf;
607 unsigned char *cdb = cmd->t_task_cdb;
608 unsigned char buf[SE_INQUIRY_BUF];
609 sense_reason_t ret;
610 int p;
611
612 memset(buf, 0, SE_INQUIRY_BUF);
613
614 if (dev == tpg->tpg_virt_lun0.lun_se_dev)
615 buf[0] = 0x3f; /* Not connected */
616 else
617 buf[0] = dev->transport->get_device_type(dev);
618
619 if (!(cdb[1] & 0x1)) {
620 if (cdb[2]) {
621 pr_err("INQUIRY with EVPD==0 but PAGE CODE=%02x\n",
622 cdb[2]);
623 ret = TCM_INVALID_CDB_FIELD;
624 goto out;
625 }
626
627 ret = spc_emulate_inquiry_std(cmd, buf);
628 goto out;
629 }
630
631 for (p = 0; p < ARRAY_SIZE(evpd_handlers); ++p) {
632 if (cdb[2] == evpd_handlers[p].page) {
633 buf[1] = cdb[2];
634 ret = evpd_handlers[p].emulate(cmd, buf);
635 goto out;
636 }
637 }
638
639 pr_err("Unknown VPD Code: 0x%02x\n", cdb[2]);
640 ret = TCM_INVALID_CDB_FIELD;
641
642 out:
643 rbuf = transport_kmap_data_sg(cmd);
644 if (rbuf) {
645 memcpy(rbuf, buf, min_t(u32, sizeof(buf), cmd->data_length));
646 transport_kunmap_data_sg(cmd);
647 }
648
649 if (!ret)
650 target_complete_cmd(cmd, GOOD);
651 return ret;
652 }
653
654 static int spc_modesense_rwrecovery(struct se_device *dev, u8 pc, u8 *p)
655 {
656 p[0] = 0x01;
657 p[1] = 0x0a;
658
659 /* No changeable values for now */
660 if (pc == 1)
661 goto out;
662
663 out:
664 return 12;
665 }
666
667 static int spc_modesense_control(struct se_device *dev, u8 pc, u8 *p)
668 {
669 p[0] = 0x0a;
670 p[1] = 0x0a;
671
672 /* No changeable values for now */
673 if (pc == 1)
674 goto out;
675
676 p[2] = 2;
677 /*
678 * From spc4r23, 7.4.7 Control mode page
679 *
680 * The QUEUE ALGORITHM MODIFIER field (see table 368) specifies
681 * restrictions on the algorithm used for reordering commands
682 * having the SIMPLE task attribute (see SAM-4).
683 *
684 * Table 368 -- QUEUE ALGORITHM MODIFIER field
685 * Code Description
686 * 0h Restricted reordering
687 * 1h Unrestricted reordering allowed
688 * 2h to 7h Reserved
689 * 8h to Fh Vendor specific
690 *
691 * A value of zero in the QUEUE ALGORITHM MODIFIER field specifies that
692 * the device server shall order the processing sequence of commands
693 * having the SIMPLE task attribute such that data integrity is maintained
694 * for that I_T nexus (i.e., if the transmission of new SCSI transport protocol
695 * requests is halted at any time, the final value of all data observable
696 * on the medium shall be the same as if all the commands had been processed
697 * with the ORDERED task attribute).
698 *
699 * A value of one in the QUEUE ALGORITHM MODIFIER field specifies that the
700 * device server may reorder the processing sequence of commands having the
701 * SIMPLE task attribute in any manner. Any data integrity exposures related to
702 * command sequence order shall be explicitly handled by the application client
703 * through the selection of appropriate ommands and task attributes.
704 */
705 p[3] = (dev->dev_attrib.emulate_rest_reord == 1) ? 0x00 : 0x10;
706 /*
707 * From spc4r17, section 7.4.6 Control mode Page
708 *
709 * Unit Attention interlocks control (UN_INTLCK_CTRL) to code 00b
710 *
711 * 00b: The logical unit shall clear any unit attention condition
712 * reported in the same I_T_L_Q nexus transaction as a CHECK CONDITION
713 * status and shall not establish a unit attention condition when a com-
714 * mand is completed with BUSY, TASK SET FULL, or RESERVATION CONFLICT
715 * status.
716 *
717 * 10b: The logical unit shall not clear any unit attention condition
718 * reported in the same I_T_L_Q nexus transaction as a CHECK CONDITION
719 * status and shall not establish a unit attention condition when
720 * a command is completed with BUSY, TASK SET FULL, or RESERVATION
721 * CONFLICT status.
722 *
723 * 11b a The logical unit shall not clear any unit attention condition
724 * reported in the same I_T_L_Q nexus transaction as a CHECK CONDITION
725 * status and shall establish a unit attention condition for the
726 * initiator port associated with the I_T nexus on which the BUSY,
727 * TASK SET FULL, or RESERVATION CONFLICT status is being returned.
728 * Depending on the status, the additional sense code shall be set to
729 * PREVIOUS BUSY STATUS, PREVIOUS TASK SET FULL STATUS, or PREVIOUS
730 * RESERVATION CONFLICT STATUS. Until it is cleared by a REQUEST SENSE
731 * command, a unit attention condition shall be established only once
732 * for a BUSY, TASK SET FULL, or RESERVATION CONFLICT status regardless
733 * to the number of commands completed with one of those status codes.
734 */
735 p[4] = (dev->dev_attrib.emulate_ua_intlck_ctrl == 2) ? 0x30 :
736 (dev->dev_attrib.emulate_ua_intlck_ctrl == 1) ? 0x20 : 0x00;
737 /*
738 * From spc4r17, section 7.4.6 Control mode Page
739 *
740 * Task Aborted Status (TAS) bit set to zero.
741 *
742 * A task aborted status (TAS) bit set to zero specifies that aborted
743 * tasks shall be terminated by the device server without any response
744 * to the application client. A TAS bit set to one specifies that tasks
745 * aborted by the actions of an I_T nexus other than the I_T nexus on
746 * which the command was received shall be completed with TASK ABORTED
747 * status (see SAM-4).
748 */
749 p[5] = (dev->dev_attrib.emulate_tas) ? 0x40 : 0x00;
750 p[8] = 0xff;
751 p[9] = 0xff;
752 p[11] = 30;
753
754 out:
755 return 12;
756 }
757
758 static int spc_modesense_caching(struct se_device *dev, u8 pc, u8 *p)
759 {
760 p[0] = 0x08;
761 p[1] = 0x12;
762
763 /* No changeable values for now */
764 if (pc == 1)
765 goto out;
766
767 if (dev->dev_attrib.emulate_write_cache > 0)
768 p[2] = 0x04; /* Write Cache Enable */
769 p[12] = 0x20; /* Disabled Read Ahead */
770
771 out:
772 return 20;
773 }
774
775 static int spc_modesense_informational_exceptions(struct se_device *dev, u8 pc, unsigned char *p)
776 {
777 p[0] = 0x1c;
778 p[1] = 0x0a;
779
780 /* No changeable values for now */
781 if (pc == 1)
782 goto out;
783
784 out:
785 return 12;
786 }
787
788 static struct {
789 uint8_t page;
790 uint8_t subpage;
791 int (*emulate)(struct se_device *, u8, unsigned char *);
792 } modesense_handlers[] = {
793 { .page = 0x01, .subpage = 0x00, .emulate = spc_modesense_rwrecovery },
794 { .page = 0x08, .subpage = 0x00, .emulate = spc_modesense_caching },
795 { .page = 0x0a, .subpage = 0x00, .emulate = spc_modesense_control },
796 { .page = 0x1c, .subpage = 0x00, .emulate = spc_modesense_informational_exceptions },
797 };
798
799 static void spc_modesense_write_protect(unsigned char *buf, int type)
800 {
801 /*
802 * I believe that the WP bit (bit 7) in the mode header is the same for
803 * all device types..
804 */
805 switch (type) {
806 case TYPE_DISK:
807 case TYPE_TAPE:
808 default:
809 buf[0] |= 0x80; /* WP bit */
810 break;
811 }
812 }
813
814 static void spc_modesense_dpofua(unsigned char *buf, int type)
815 {
816 switch (type) {
817 case TYPE_DISK:
818 buf[0] |= 0x10; /* DPOFUA bit */
819 break;
820 default:
821 break;
822 }
823 }
824
825 static int spc_modesense_blockdesc(unsigned char *buf, u64 blocks, u32 block_size)
826 {
827 *buf++ = 8;
828 put_unaligned_be32(min(blocks, 0xffffffffull), buf);
829 buf += 4;
830 put_unaligned_be32(block_size, buf);
831 return 9;
832 }
833
834 static int spc_modesense_long_blockdesc(unsigned char *buf, u64 blocks, u32 block_size)
835 {
836 if (blocks <= 0xffffffff)
837 return spc_modesense_blockdesc(buf + 3, blocks, block_size) + 3;
838
839 *buf++ = 1; /* LONGLBA */
840 buf += 2;
841 *buf++ = 16;
842 put_unaligned_be64(blocks, buf);
843 buf += 12;
844 put_unaligned_be32(block_size, buf);
845
846 return 17;
847 }
848
849 static sense_reason_t spc_emulate_modesense(struct se_cmd *cmd)
850 {
851 struct se_device *dev = cmd->se_dev;
852 char *cdb = cmd->t_task_cdb;
853 unsigned char buf[SE_MODE_PAGE_BUF], *rbuf;
854 int type = dev->transport->get_device_type(dev);
855 int ten = (cmd->t_task_cdb[0] == MODE_SENSE_10);
856 bool dbd = !!(cdb[1] & 0x08);
857 bool llba = ten ? !!(cdb[1] & 0x10) : false;
858 u8 pc = cdb[2] >> 6;
859 u8 page = cdb[2] & 0x3f;
860 u8 subpage = cdb[3];
861 int length = 0;
862 int ret;
863 int i;
864
865 memset(buf, 0, SE_MODE_PAGE_BUF);
866
867 /*
868 * Skip over MODE DATA LENGTH + MEDIUM TYPE fields to byte 3 for
869 * MODE_SENSE_10 and byte 2 for MODE_SENSE (6).
870 */
871 length = ten ? 3 : 2;
872
873 /* DEVICE-SPECIFIC PARAMETER */
874 if ((cmd->se_lun->lun_access & TRANSPORT_LUNFLAGS_READ_ONLY) ||
875 (cmd->se_deve &&
876 (cmd->se_deve->lun_flags & TRANSPORT_LUNFLAGS_READ_ONLY)))
877 spc_modesense_write_protect(&buf[length], type);
878
879 if ((dev->dev_attrib.emulate_write_cache > 0) &&
880 (dev->dev_attrib.emulate_fua_write > 0))
881 spc_modesense_dpofua(&buf[length], type);
882
883 ++length;
884
885 /* BLOCK DESCRIPTOR */
886
887 /*
888 * For now we only include a block descriptor for disk (SBC)
889 * devices; other command sets use a slightly different format.
890 */
891 if (!dbd && type == TYPE_DISK) {
892 u64 blocks = dev->transport->get_blocks(dev);
893 u32 block_size = dev->dev_attrib.block_size;
894
895 if (ten) {
896 if (llba) {
897 length += spc_modesense_long_blockdesc(&buf[length],
898 blocks, block_size);
899 } else {
900 length += 3;
901 length += spc_modesense_blockdesc(&buf[length],
902 blocks, block_size);
903 }
904 } else {
905 length += spc_modesense_blockdesc(&buf[length], blocks,
906 block_size);
907 }
908 } else {
909 if (ten)
910 length += 4;
911 else
912 length += 1;
913 }
914
915 if (page == 0x3f) {
916 if (subpage != 0x00 && subpage != 0xff) {
917 pr_warn("MODE_SENSE: Invalid subpage code: 0x%02x\n", subpage);
918 return TCM_INVALID_CDB_FIELD;
919 }
920
921 for (i = 0; i < ARRAY_SIZE(modesense_handlers); ++i) {
922 /*
923 * Tricky way to say all subpage 00h for
924 * subpage==0, all subpages for subpage==0xff
925 * (and we just checked above that those are
926 * the only two possibilities).
927 */
928 if ((modesense_handlers[i].subpage & ~subpage) == 0) {
929 ret = modesense_handlers[i].emulate(dev, pc, &buf[length]);
930 if (!ten && length + ret >= 255)
931 break;
932 length += ret;
933 }
934 }
935
936 goto set_length;
937 }
938
939 for (i = 0; i < ARRAY_SIZE(modesense_handlers); ++i)
940 if (modesense_handlers[i].page == page &&
941 modesense_handlers[i].subpage == subpage) {
942 length += modesense_handlers[i].emulate(dev, pc, &buf[length]);
943 goto set_length;
944 }
945
946 /*
947 * We don't intend to implement:
948 * - obsolete page 03h "format parameters" (checked by Solaris)
949 */
950 if (page != 0x03)
951 pr_err("MODE SENSE: unimplemented page/subpage: 0x%02x/0x%02x\n",
952 page, subpage);
953
954 return TCM_UNKNOWN_MODE_PAGE;
955
956 set_length:
957 if (ten)
958 put_unaligned_be16(length - 2, buf);
959 else
960 buf[0] = length - 1;
961
962 rbuf = transport_kmap_data_sg(cmd);
963 if (rbuf) {
964 memcpy(rbuf, buf, min_t(u32, SE_MODE_PAGE_BUF, cmd->data_length));
965 transport_kunmap_data_sg(cmd);
966 }
967
968 target_complete_cmd(cmd, GOOD);
969 return 0;
970 }
971
972 static sense_reason_t spc_emulate_modeselect(struct se_cmd *cmd)
973 {
974 struct se_device *dev = cmd->se_dev;
975 char *cdb = cmd->t_task_cdb;
976 bool ten = cdb[0] == MODE_SELECT_10;
977 int off = ten ? 8 : 4;
978 bool pf = !!(cdb[1] & 0x10);
979 u8 page, subpage;
980 unsigned char *buf;
981 unsigned char tbuf[SE_MODE_PAGE_BUF];
982 int length;
983 int ret = 0;
984 int i;
985
986 buf = transport_kmap_data_sg(cmd);
987 if (!buf)
988 return TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE;
989
990 if (!pf) {
991 ret = TCM_INVALID_CDB_FIELD;
992 goto out;
993 }
994
995 page = buf[off] & 0x3f;
996 subpage = buf[off] & 0x40 ? buf[off + 1] : 0;
997
998 for (i = 0; i < ARRAY_SIZE(modesense_handlers); ++i)
999 if (modesense_handlers[i].page == page &&
1000 modesense_handlers[i].subpage == subpage) {
1001 memset(tbuf, 0, SE_MODE_PAGE_BUF);
1002 length = modesense_handlers[i].emulate(dev, 0, tbuf);
1003 goto check_contents;
1004 }
1005
1006 ret = TCM_UNKNOWN_MODE_PAGE;
1007 goto out;
1008
1009 check_contents:
1010 if (memcmp(buf + off, tbuf, length))
1011 ret = TCM_INVALID_PARAMETER_LIST;
1012
1013 out:
1014 transport_kunmap_data_sg(cmd);
1015
1016 if (!ret)
1017 target_complete_cmd(cmd, GOOD);
1018 return ret;
1019 }
1020
1021 static sense_reason_t spc_emulate_request_sense(struct se_cmd *cmd)
1022 {
1023 unsigned char *cdb = cmd->t_task_cdb;
1024 unsigned char *rbuf;
1025 u8 ua_asc = 0, ua_ascq = 0;
1026 unsigned char buf[SE_SENSE_BUF];
1027
1028 memset(buf, 0, SE_SENSE_BUF);
1029
1030 if (cdb[1] & 0x01) {
1031 pr_err("REQUEST_SENSE description emulation not"
1032 " supported\n");
1033 return TCM_INVALID_CDB_FIELD;
1034 }
1035
1036 rbuf = transport_kmap_data_sg(cmd);
1037 if (!rbuf)
1038 return TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE;
1039
1040 if (!core_scsi3_ua_clear_for_request_sense(cmd, &ua_asc, &ua_ascq)) {
1041 /*
1042 * CURRENT ERROR, UNIT ATTENTION
1043 */
1044 buf[0] = 0x70;
1045 buf[SPC_SENSE_KEY_OFFSET] = UNIT_ATTENTION;
1046
1047 /*
1048 * The Additional Sense Code (ASC) from the UNIT ATTENTION
1049 */
1050 buf[SPC_ASC_KEY_OFFSET] = ua_asc;
1051 buf[SPC_ASCQ_KEY_OFFSET] = ua_ascq;
1052 buf[7] = 0x0A;
1053 } else {
1054 /*
1055 * CURRENT ERROR, NO SENSE
1056 */
1057 buf[0] = 0x70;
1058 buf[SPC_SENSE_KEY_OFFSET] = NO_SENSE;
1059
1060 /*
1061 * NO ADDITIONAL SENSE INFORMATION
1062 */
1063 buf[SPC_ASC_KEY_OFFSET] = 0x00;
1064 buf[7] = 0x0A;
1065 }
1066
1067 memcpy(rbuf, buf, min_t(u32, sizeof(buf), cmd->data_length));
1068 transport_kunmap_data_sg(cmd);
1069
1070 target_complete_cmd(cmd, GOOD);
1071 return 0;
1072 }
1073
1074 sense_reason_t spc_emulate_report_luns(struct se_cmd *cmd)
1075 {
1076 struct se_dev_entry *deve;
1077 struct se_session *sess = cmd->se_sess;
1078 unsigned char *buf;
1079 u32 lun_count = 0, offset = 8, i;
1080
1081 if (cmd->data_length < 16) {
1082 pr_warn("REPORT LUNS allocation length %u too small\n",
1083 cmd->data_length);
1084 return TCM_INVALID_CDB_FIELD;
1085 }
1086
1087 buf = transport_kmap_data_sg(cmd);
1088 if (!buf)
1089 return TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE;
1090
1091 /*
1092 * If no struct se_session pointer is present, this struct se_cmd is
1093 * coming via a target_core_mod PASSTHROUGH op, and not through
1094 * a $FABRIC_MOD. In that case, report LUN=0 only.
1095 */
1096 if (!sess) {
1097 int_to_scsilun(0, (struct scsi_lun *)&buf[offset]);
1098 lun_count = 1;
1099 goto done;
1100 }
1101
1102 spin_lock_irq(&sess->se_node_acl->device_list_lock);
1103 for (i = 0; i < TRANSPORT_MAX_LUNS_PER_TPG; i++) {
1104 deve = sess->se_node_acl->device_list[i];
1105 if (!(deve->lun_flags & TRANSPORT_LUNFLAGS_INITIATOR_ACCESS))
1106 continue;
1107 /*
1108 * We determine the correct LUN LIST LENGTH even once we
1109 * have reached the initial allocation length.
1110 * See SPC2-R20 7.19.
1111 */
1112 lun_count++;
1113 if ((offset + 8) > cmd->data_length)
1114 continue;
1115
1116 int_to_scsilun(deve->mapped_lun, (struct scsi_lun *)&buf[offset]);
1117 offset += 8;
1118 }
1119 spin_unlock_irq(&sess->se_node_acl->device_list_lock);
1120
1121 /*
1122 * See SPC3 r07, page 159.
1123 */
1124 done:
1125 lun_count *= 8;
1126 buf[0] = ((lun_count >> 24) & 0xff);
1127 buf[1] = ((lun_count >> 16) & 0xff);
1128 buf[2] = ((lun_count >> 8) & 0xff);
1129 buf[3] = (lun_count & 0xff);
1130 transport_kunmap_data_sg(cmd);
1131
1132 target_complete_cmd(cmd, GOOD);
1133 return 0;
1134 }
1135 EXPORT_SYMBOL(spc_emulate_report_luns);
1136
1137 static sense_reason_t
1138 spc_emulate_testunitready(struct se_cmd *cmd)
1139 {
1140 target_complete_cmd(cmd, GOOD);
1141 return 0;
1142 }
1143
1144 sense_reason_t
1145 spc_parse_cdb(struct se_cmd *cmd, unsigned int *size)
1146 {
1147 struct se_device *dev = cmd->se_dev;
1148 unsigned char *cdb = cmd->t_task_cdb;
1149
1150 switch (cdb[0]) {
1151 case MODE_SELECT:
1152 *size = cdb[4];
1153 cmd->execute_cmd = spc_emulate_modeselect;
1154 break;
1155 case MODE_SELECT_10:
1156 *size = (cdb[7] << 8) + cdb[8];
1157 cmd->execute_cmd = spc_emulate_modeselect;
1158 break;
1159 case MODE_SENSE:
1160 *size = cdb[4];
1161 cmd->execute_cmd = spc_emulate_modesense;
1162 break;
1163 case MODE_SENSE_10:
1164 *size = (cdb[7] << 8) + cdb[8];
1165 cmd->execute_cmd = spc_emulate_modesense;
1166 break;
1167 case LOG_SELECT:
1168 case LOG_SENSE:
1169 *size = (cdb[7] << 8) + cdb[8];
1170 break;
1171 case PERSISTENT_RESERVE_IN:
1172 *size = (cdb[7] << 8) + cdb[8];
1173 cmd->execute_cmd = target_scsi3_emulate_pr_in;
1174 break;
1175 case PERSISTENT_RESERVE_OUT:
1176 *size = (cdb[7] << 8) + cdb[8];
1177 cmd->execute_cmd = target_scsi3_emulate_pr_out;
1178 break;
1179 case RELEASE:
1180 case RELEASE_10:
1181 if (cdb[0] == RELEASE_10)
1182 *size = (cdb[7] << 8) | cdb[8];
1183 else
1184 *size = cmd->data_length;
1185
1186 cmd->execute_cmd = target_scsi2_reservation_release;
1187 break;
1188 case RESERVE:
1189 case RESERVE_10:
1190 /*
1191 * The SPC-2 RESERVE does not contain a size in the SCSI CDB.
1192 * Assume the passthrough or $FABRIC_MOD will tell us about it.
1193 */
1194 if (cdb[0] == RESERVE_10)
1195 *size = (cdb[7] << 8) | cdb[8];
1196 else
1197 *size = cmd->data_length;
1198
1199 cmd->execute_cmd = target_scsi2_reservation_reserve;
1200 break;
1201 case REQUEST_SENSE:
1202 *size = cdb[4];
1203 cmd->execute_cmd = spc_emulate_request_sense;
1204 break;
1205 case INQUIRY:
1206 *size = (cdb[3] << 8) + cdb[4];
1207
1208 /*
1209 * Do implict HEAD_OF_QUEUE processing for INQUIRY.
1210 * See spc4r17 section 5.3
1211 */
1212 cmd->sam_task_attr = MSG_HEAD_TAG;
1213 cmd->execute_cmd = spc_emulate_inquiry;
1214 break;
1215 case SECURITY_PROTOCOL_IN:
1216 case SECURITY_PROTOCOL_OUT:
1217 *size = (cdb[6] << 24) | (cdb[7] << 16) | (cdb[8] << 8) | cdb[9];
1218 break;
1219 case EXTENDED_COPY:
1220 case READ_ATTRIBUTE:
1221 case RECEIVE_COPY_RESULTS:
1222 case WRITE_ATTRIBUTE:
1223 *size = (cdb[10] << 24) | (cdb[11] << 16) |
1224 (cdb[12] << 8) | cdb[13];
1225 break;
1226 case RECEIVE_DIAGNOSTIC:
1227 case SEND_DIAGNOSTIC:
1228 *size = (cdb[3] << 8) | cdb[4];
1229 break;
1230 case WRITE_BUFFER:
1231 *size = (cdb[6] << 16) + (cdb[7] << 8) + cdb[8];
1232 break;
1233 case REPORT_LUNS:
1234 cmd->execute_cmd = spc_emulate_report_luns;
1235 *size = (cdb[6] << 24) | (cdb[7] << 16) | (cdb[8] << 8) | cdb[9];
1236 /*
1237 * Do implict HEAD_OF_QUEUE processing for REPORT_LUNS
1238 * See spc4r17 section 5.3
1239 */
1240 cmd->sam_task_attr = MSG_HEAD_TAG;
1241 break;
1242 case TEST_UNIT_READY:
1243 cmd->execute_cmd = spc_emulate_testunitready;
1244 *size = 0;
1245 break;
1246 case MAINTENANCE_IN:
1247 if (dev->transport->get_device_type(dev) != TYPE_ROM) {
1248 /*
1249 * MAINTENANCE_IN from SCC-2
1250 * Check for emulated MI_REPORT_TARGET_PGS
1251 */
1252 if ((cdb[1] & 0x1f) == MI_REPORT_TARGET_PGS) {
1253 cmd->execute_cmd =
1254 target_emulate_report_target_port_groups;
1255 }
1256 *size = get_unaligned_be32(&cdb[6]);
1257 } else {
1258 /*
1259 * GPCMD_SEND_KEY from multi media commands
1260 */
1261 *size = get_unaligned_be16(&cdb[8]);
1262 }
1263 break;
1264 case MAINTENANCE_OUT:
1265 if (dev->transport->get_device_type(dev) != TYPE_ROM) {
1266 /*
1267 * MAINTENANCE_OUT from SCC-2
1268 * Check for emulated MO_SET_TARGET_PGS.
1269 */
1270 if (cdb[1] == MO_SET_TARGET_PGS) {
1271 cmd->execute_cmd =
1272 target_emulate_set_target_port_groups;
1273 }
1274 *size = get_unaligned_be32(&cdb[6]);
1275 } else {
1276 /*
1277 * GPCMD_SEND_KEY from multi media commands
1278 */
1279 *size = get_unaligned_be16(&cdb[8]);
1280 }
1281 break;
1282 default:
1283 pr_warn("TARGET_CORE[%s]: Unsupported SCSI Opcode"
1284 " 0x%02x, sending CHECK_CONDITION.\n",
1285 cmd->se_tfo->get_fabric_name(), cdb[0]);
1286 return TCM_UNSUPPORTED_SCSI_OPCODE;
1287 }
1288
1289 return 0;
1290 }
1291 EXPORT_SYMBOL(spc_parse_cdb);
Linux kernel - Deliverables
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