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target: Add MAXIMUM COMPARE AND WRITE LENGTH in Block Limits VPD
[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 sense_reason_t
70 spc_emulate_inquiry_std(struct se_cmd *cmd, unsigned 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 EXPORT_SYMBOL(spc_emulate_inquiry_std);
108
109 /* unit serial number */
110 static sense_reason_t
111 spc_emulate_evpd_80(struct se_cmd *cmd, unsigned char *buf)
112 {
113 struct se_device *dev = cmd->se_dev;
114 u16 len = 0;
115
116 if (dev->dev_flags & DF_EMULATED_VPD_UNIT_SERIAL) {
117 u32 unit_serial_len;
118
119 unit_serial_len = strlen(dev->t10_wwn.unit_serial);
120 unit_serial_len++; /* For NULL Terminator */
121
122 len += sprintf(&buf[4], "%s", dev->t10_wwn.unit_serial);
123 len++; /* Extra Byte for NULL Terminator */
124 buf[3] = len;
125 }
126 return 0;
127 }
128
129 static void spc_parse_naa_6h_vendor_specific(struct se_device *dev,
130 unsigned char *buf)
131 {
132 unsigned char *p = &dev->t10_wwn.unit_serial[0];
133 int cnt;
134 bool next = true;
135
136 /*
137 * Generate up to 36 bits of VENDOR SPECIFIC IDENTIFIER starting on
138 * byte 3 bit 3-0 for NAA IEEE Registered Extended DESIGNATOR field
139 * format, followed by 64 bits of VENDOR SPECIFIC IDENTIFIER EXTENSION
140 * to complete the payload. These are based from VPD=0x80 PRODUCT SERIAL
141 * NUMBER set via vpd_unit_serial in target_core_configfs.c to ensure
142 * per device uniqeness.
143 */
144 for (cnt = 0; *p && cnt < 13; p++) {
145 int val = hex_to_bin(*p);
146
147 if (val < 0)
148 continue;
149
150 if (next) {
151 next = false;
152 buf[cnt++] |= val;
153 } else {
154 next = true;
155 buf[cnt] = val << 4;
156 }
157 }
158 }
159
160 /*
161 * Device identification VPD, for a complete list of
162 * DESIGNATOR TYPEs see spc4r17 Table 459.
163 */
164 sense_reason_t
165 spc_emulate_evpd_83(struct se_cmd *cmd, unsigned char *buf)
166 {
167 struct se_device *dev = cmd->se_dev;
168 struct se_lun *lun = cmd->se_lun;
169 struct se_port *port = NULL;
170 struct se_portal_group *tpg = NULL;
171 struct t10_alua_lu_gp_member *lu_gp_mem;
172 struct t10_alua_tg_pt_gp *tg_pt_gp;
173 struct t10_alua_tg_pt_gp_member *tg_pt_gp_mem;
174 unsigned char *prod = &dev->t10_wwn.model[0];
175 u32 prod_len;
176 u32 unit_serial_len, off = 0;
177 u16 len = 0, id_len;
178
179 off = 4;
180
181 /*
182 * NAA IEEE Registered Extended Assigned designator format, see
183 * spc4r17 section 7.7.3.6.5
184 *
185 * We depend upon a target_core_mod/ConfigFS provided
186 * /sys/kernel/config/target/core/$HBA/$DEV/wwn/vpd_unit_serial
187 * value in order to return the NAA id.
188 */
189 if (!(dev->dev_flags & DF_EMULATED_VPD_UNIT_SERIAL))
190 goto check_t10_vend_desc;
191
192 /* CODE SET == Binary */
193 buf[off++] = 0x1;
194
195 /* Set ASSOCIATION == addressed logical unit: 0)b */
196 buf[off] = 0x00;
197
198 /* Identifier/Designator type == NAA identifier */
199 buf[off++] |= 0x3;
200 off++;
201
202 /* Identifier/Designator length */
203 buf[off++] = 0x10;
204
205 /*
206 * Start NAA IEEE Registered Extended Identifier/Designator
207 */
208 buf[off++] = (0x6 << 4);
209
210 /*
211 * Use OpenFabrics IEEE Company ID: 00 14 05
212 */
213 buf[off++] = 0x01;
214 buf[off++] = 0x40;
215 buf[off] = (0x5 << 4);
216
217 /*
218 * Return ConfigFS Unit Serial Number information for
219 * VENDOR_SPECIFIC_IDENTIFIER and
220 * VENDOR_SPECIFIC_IDENTIFIER_EXTENTION
221 */
222 spc_parse_naa_6h_vendor_specific(dev, &buf[off]);
223
224 len = 20;
225 off = (len + 4);
226
227 check_t10_vend_desc:
228 /*
229 * T10 Vendor Identifier Page, see spc4r17 section 7.7.3.4
230 */
231 id_len = 8; /* For Vendor field */
232 prod_len = 4; /* For VPD Header */
233 prod_len += 8; /* For Vendor field */
234 prod_len += strlen(prod);
235 prod_len++; /* For : */
236
237 if (dev->dev_flags & DF_EMULATED_VPD_UNIT_SERIAL) {
238 unit_serial_len = strlen(&dev->t10_wwn.unit_serial[0]);
239 unit_serial_len++; /* For NULL Terminator */
240
241 id_len += sprintf(&buf[off+12], "%s:%s", prod,
242 &dev->t10_wwn.unit_serial[0]);
243 }
244 buf[off] = 0x2; /* ASCII */
245 buf[off+1] = 0x1; /* T10 Vendor ID */
246 buf[off+2] = 0x0;
247 memcpy(&buf[off+4], "LIO-ORG", 8);
248 /* Extra Byte for NULL Terminator */
249 id_len++;
250 /* Identifier Length */
251 buf[off+3] = id_len;
252 /* Header size for Designation descriptor */
253 len += (id_len + 4);
254 off += (id_len + 4);
255 /*
256 * struct se_port is only set for INQUIRY VPD=1 through $FABRIC_MOD
257 */
258 port = lun->lun_sep;
259 if (port) {
260 struct t10_alua_lu_gp *lu_gp;
261 u32 padding, scsi_name_len;
262 u16 lu_gp_id = 0;
263 u16 tg_pt_gp_id = 0;
264 u16 tpgt;
265
266 tpg = port->sep_tpg;
267 /*
268 * Relative target port identifer, see spc4r17
269 * section 7.7.3.7
270 *
271 * Get the PROTOCOL IDENTIFIER as defined by spc4r17
272 * section 7.5.1 Table 362
273 */
274 buf[off] =
275 (tpg->se_tpg_tfo->get_fabric_proto_ident(tpg) << 4);
276 buf[off++] |= 0x1; /* CODE SET == Binary */
277 buf[off] = 0x80; /* Set PIV=1 */
278 /* Set ASSOCIATION == target port: 01b */
279 buf[off] |= 0x10;
280 /* DESIGNATOR TYPE == Relative target port identifer */
281 buf[off++] |= 0x4;
282 off++; /* Skip over Reserved */
283 buf[off++] = 4; /* DESIGNATOR LENGTH */
284 /* Skip over Obsolete field in RTPI payload
285 * in Table 472 */
286 off += 2;
287 buf[off++] = ((port->sep_rtpi >> 8) & 0xff);
288 buf[off++] = (port->sep_rtpi & 0xff);
289 len += 8; /* Header size + Designation descriptor */
290 /*
291 * Target port group identifier, see spc4r17
292 * section 7.7.3.8
293 *
294 * Get the PROTOCOL IDENTIFIER as defined by spc4r17
295 * section 7.5.1 Table 362
296 */
297 tg_pt_gp_mem = port->sep_alua_tg_pt_gp_mem;
298 if (!tg_pt_gp_mem)
299 goto check_lu_gp;
300
301 spin_lock(&tg_pt_gp_mem->tg_pt_gp_mem_lock);
302 tg_pt_gp = tg_pt_gp_mem->tg_pt_gp;
303 if (!tg_pt_gp) {
304 spin_unlock(&tg_pt_gp_mem->tg_pt_gp_mem_lock);
305 goto check_lu_gp;
306 }
307 tg_pt_gp_id = tg_pt_gp->tg_pt_gp_id;
308 spin_unlock(&tg_pt_gp_mem->tg_pt_gp_mem_lock);
309
310 buf[off] =
311 (tpg->se_tpg_tfo->get_fabric_proto_ident(tpg) << 4);
312 buf[off++] |= 0x1; /* CODE SET == Binary */
313 buf[off] = 0x80; /* Set PIV=1 */
314 /* Set ASSOCIATION == target port: 01b */
315 buf[off] |= 0x10;
316 /* DESIGNATOR TYPE == Target port group identifier */
317 buf[off++] |= 0x5;
318 off++; /* Skip over Reserved */
319 buf[off++] = 4; /* DESIGNATOR LENGTH */
320 off += 2; /* Skip over Reserved Field */
321 buf[off++] = ((tg_pt_gp_id >> 8) & 0xff);
322 buf[off++] = (tg_pt_gp_id & 0xff);
323 len += 8; /* Header size + Designation descriptor */
324 /*
325 * Logical Unit Group identifier, see spc4r17
326 * section 7.7.3.8
327 */
328 check_lu_gp:
329 lu_gp_mem = dev->dev_alua_lu_gp_mem;
330 if (!lu_gp_mem)
331 goto check_scsi_name;
332
333 spin_lock(&lu_gp_mem->lu_gp_mem_lock);
334 lu_gp = lu_gp_mem->lu_gp;
335 if (!lu_gp) {
336 spin_unlock(&lu_gp_mem->lu_gp_mem_lock);
337 goto check_scsi_name;
338 }
339 lu_gp_id = lu_gp->lu_gp_id;
340 spin_unlock(&lu_gp_mem->lu_gp_mem_lock);
341
342 buf[off++] |= 0x1; /* CODE SET == Binary */
343 /* DESIGNATOR TYPE == Logical Unit Group identifier */
344 buf[off++] |= 0x6;
345 off++; /* Skip over Reserved */
346 buf[off++] = 4; /* DESIGNATOR LENGTH */
347 off += 2; /* Skip over Reserved Field */
348 buf[off++] = ((lu_gp_id >> 8) & 0xff);
349 buf[off++] = (lu_gp_id & 0xff);
350 len += 8; /* Header size + Designation descriptor */
351 /*
352 * SCSI name string designator, see spc4r17
353 * section 7.7.3.11
354 *
355 * Get the PROTOCOL IDENTIFIER as defined by spc4r17
356 * section 7.5.1 Table 362
357 */
358 check_scsi_name:
359 scsi_name_len = strlen(tpg->se_tpg_tfo->tpg_get_wwn(tpg));
360 /* UTF-8 ",t,0x<16-bit TPGT>" + NULL Terminator */
361 scsi_name_len += 10;
362 /* Check for 4-byte padding */
363 padding = ((-scsi_name_len) & 3);
364 if (padding != 0)
365 scsi_name_len += padding;
366 /* Header size + Designation descriptor */
367 scsi_name_len += 4;
368
369 buf[off] =
370 (tpg->se_tpg_tfo->get_fabric_proto_ident(tpg) << 4);
371 buf[off++] |= 0x3; /* CODE SET == UTF-8 */
372 buf[off] = 0x80; /* Set PIV=1 */
373 /* Set ASSOCIATION == target port: 01b */
374 buf[off] |= 0x10;
375 /* DESIGNATOR TYPE == SCSI name string */
376 buf[off++] |= 0x8;
377 off += 2; /* Skip over Reserved and length */
378 /*
379 * SCSI name string identifer containing, $FABRIC_MOD
380 * dependent information. For LIO-Target and iSCSI
381 * Target Port, this means "<iSCSI name>,t,0x<TPGT> in
382 * UTF-8 encoding.
383 */
384 tpgt = tpg->se_tpg_tfo->tpg_get_tag(tpg);
385 scsi_name_len = sprintf(&buf[off], "%s,t,0x%04x",
386 tpg->se_tpg_tfo->tpg_get_wwn(tpg), tpgt);
387 scsi_name_len += 1 /* Include NULL terminator */;
388 /*
389 * The null-terminated, null-padded (see 4.4.2) SCSI
390 * NAME STRING field contains a UTF-8 format string.
391 * The number of bytes in the SCSI NAME STRING field
392 * (i.e., the value in the DESIGNATOR LENGTH field)
393 * shall be no larger than 256 and shall be a multiple
394 * of four.
395 */
396 if (padding)
397 scsi_name_len += padding;
398
399 buf[off-1] = scsi_name_len;
400 off += scsi_name_len;
401 /* Header size + Designation descriptor */
402 len += (scsi_name_len + 4);
403 }
404 buf[2] = ((len >> 8) & 0xff);
405 buf[3] = (len & 0xff); /* Page Length for VPD 0x83 */
406 return 0;
407 }
408 EXPORT_SYMBOL(spc_emulate_evpd_83);
409
410 static bool
411 spc_check_dev_wce(struct se_device *dev)
412 {
413 bool wce = false;
414
415 if (dev->transport->get_write_cache)
416 wce = dev->transport->get_write_cache(dev);
417 else if (dev->dev_attrib.emulate_write_cache > 0)
418 wce = true;
419
420 return wce;
421 }
422
423 /* Extended INQUIRY Data VPD Page */
424 static sense_reason_t
425 spc_emulate_evpd_86(struct se_cmd *cmd, unsigned char *buf)
426 {
427 struct se_device *dev = cmd->se_dev;
428
429 buf[3] = 0x3c;
430 /* Set HEADSUP, ORDSUP, SIMPSUP */
431 buf[5] = 0x07;
432
433 /* If WriteCache emulation is enabled, set V_SUP */
434 if (spc_check_dev_wce(dev))
435 buf[6] = 0x01;
436 return 0;
437 }
438
439 /* Block Limits VPD page */
440 static sense_reason_t
441 spc_emulate_evpd_b0(struct se_cmd *cmd, unsigned char *buf)
442 {
443 struct se_device *dev = cmd->se_dev;
444 u32 max_sectors;
445 int have_tp = 0;
446
447 /*
448 * Following spc3r22 section 6.5.3 Block Limits VPD page, when
449 * emulate_tpu=1 or emulate_tpws=1 we will be expect a
450 * different page length for Thin Provisioning.
451 */
452 if (dev->dev_attrib.emulate_tpu || dev->dev_attrib.emulate_tpws)
453 have_tp = 1;
454
455 buf[0] = dev->transport->get_device_type(dev);
456 buf[3] = have_tp ? 0x3c : 0x10;
457
458 /* Set WSNZ to 1 */
459 buf[4] = 0x01;
460 /*
461 * Set MAXIMUM COMPARE AND WRITE LENGTH
462 */
463 if (dev->dev_attrib.emulate_caw)
464 buf[5] = 0x01;
465
466 /*
467 * Set OPTIMAL TRANSFER LENGTH GRANULARITY
468 */
469 put_unaligned_be16(1, &buf[6]);
470
471 /*
472 * Set MAXIMUM TRANSFER LENGTH
473 */
474 max_sectors = min(dev->dev_attrib.fabric_max_sectors,
475 dev->dev_attrib.hw_max_sectors);
476 put_unaligned_be32(max_sectors, &buf[8]);
477
478 /*
479 * Set OPTIMAL TRANSFER LENGTH
480 */
481 put_unaligned_be32(dev->dev_attrib.optimal_sectors, &buf[12]);
482
483 /*
484 * Exit now if we don't support TP.
485 */
486 if (!have_tp)
487 goto max_write_same;
488
489 /*
490 * Set MAXIMUM UNMAP LBA COUNT
491 */
492 put_unaligned_be32(dev->dev_attrib.max_unmap_lba_count, &buf[20]);
493
494 /*
495 * Set MAXIMUM UNMAP BLOCK DESCRIPTOR COUNT
496 */
497 put_unaligned_be32(dev->dev_attrib.max_unmap_block_desc_count,
498 &buf[24]);
499
500 /*
501 * Set OPTIMAL UNMAP GRANULARITY
502 */
503 put_unaligned_be32(dev->dev_attrib.unmap_granularity, &buf[28]);
504
505 /*
506 * UNMAP GRANULARITY ALIGNMENT
507 */
508 put_unaligned_be32(dev->dev_attrib.unmap_granularity_alignment,
509 &buf[32]);
510 if (dev->dev_attrib.unmap_granularity_alignment != 0)
511 buf[32] |= 0x80; /* Set the UGAVALID bit */
512
513 /*
514 * MAXIMUM WRITE SAME LENGTH
515 */
516 max_write_same:
517 put_unaligned_be64(dev->dev_attrib.max_write_same_len, &buf[36]);
518
519 return 0;
520 }
521
522 /* Block Device Characteristics VPD page */
523 static sense_reason_t
524 spc_emulate_evpd_b1(struct se_cmd *cmd, unsigned char *buf)
525 {
526 struct se_device *dev = cmd->se_dev;
527
528 buf[0] = dev->transport->get_device_type(dev);
529 buf[3] = 0x3c;
530 buf[5] = dev->dev_attrib.is_nonrot ? 1 : 0;
531
532 return 0;
533 }
534
535 /* Thin Provisioning VPD */
536 static sense_reason_t
537 spc_emulate_evpd_b2(struct se_cmd *cmd, unsigned char *buf)
538 {
539 struct se_device *dev = cmd->se_dev;
540
541 /*
542 * From spc3r22 section 6.5.4 Thin Provisioning VPD page:
543 *
544 * The PAGE LENGTH field is defined in SPC-4. If the DP bit is set to
545 * zero, then the page length shall be set to 0004h. If the DP bit
546 * is set to one, then the page length shall be set to the value
547 * defined in table 162.
548 */
549 buf[0] = dev->transport->get_device_type(dev);
550
551 /*
552 * Set Hardcoded length mentioned above for DP=0
553 */
554 put_unaligned_be16(0x0004, &buf[2]);
555
556 /*
557 * The THRESHOLD EXPONENT field indicates the threshold set size in
558 * LBAs as a power of 2 (i.e., the threshold set size is equal to
559 * 2(threshold exponent)).
560 *
561 * Note that this is currently set to 0x00 as mkp says it will be
562 * changing again. We can enable this once it has settled in T10
563 * and is actually used by Linux/SCSI ML code.
564 */
565 buf[4] = 0x00;
566
567 /*
568 * A TPU bit set to one indicates that the device server supports
569 * the UNMAP command (see 5.25). A TPU bit set to zero indicates
570 * that the device server does not support the UNMAP command.
571 */
572 if (dev->dev_attrib.emulate_tpu != 0)
573 buf[5] = 0x80;
574
575 /*
576 * A TPWS bit set to one indicates that the device server supports
577 * the use of the WRITE SAME (16) command (see 5.42) to unmap LBAs.
578 * A TPWS bit set to zero indicates that the device server does not
579 * support the use of the WRITE SAME (16) command to unmap LBAs.
580 */
581 if (dev->dev_attrib.emulate_tpws != 0)
582 buf[5] |= 0x40;
583
584 return 0;
585 }
586
587 static sense_reason_t
588 spc_emulate_evpd_00(struct se_cmd *cmd, unsigned char *buf);
589
590 static struct {
591 uint8_t page;
592 sense_reason_t (*emulate)(struct se_cmd *, unsigned char *);
593 } evpd_handlers[] = {
594 { .page = 0x00, .emulate = spc_emulate_evpd_00 },
595 { .page = 0x80, .emulate = spc_emulate_evpd_80 },
596 { .page = 0x83, .emulate = spc_emulate_evpd_83 },
597 { .page = 0x86, .emulate = spc_emulate_evpd_86 },
598 { .page = 0xb0, .emulate = spc_emulate_evpd_b0 },
599 { .page = 0xb1, .emulate = spc_emulate_evpd_b1 },
600 { .page = 0xb2, .emulate = spc_emulate_evpd_b2 },
601 };
602
603 /* supported vital product data pages */
604 static sense_reason_t
605 spc_emulate_evpd_00(struct se_cmd *cmd, unsigned char *buf)
606 {
607 int p;
608
609 /*
610 * Only report the INQUIRY EVPD=1 pages after a valid NAA
611 * Registered Extended LUN WWN has been set via ConfigFS
612 * during device creation/restart.
613 */
614 if (cmd->se_dev->dev_flags & DF_EMULATED_VPD_UNIT_SERIAL) {
615 buf[3] = ARRAY_SIZE(evpd_handlers);
616 for (p = 0; p < ARRAY_SIZE(evpd_handlers); ++p)
617 buf[p + 4] = evpd_handlers[p].page;
618 }
619
620 return 0;
621 }
622
623 static sense_reason_t
624 spc_emulate_inquiry(struct se_cmd *cmd)
625 {
626 struct se_device *dev = cmd->se_dev;
627 struct se_portal_group *tpg = cmd->se_lun->lun_sep->sep_tpg;
628 unsigned char *rbuf;
629 unsigned char *cdb = cmd->t_task_cdb;
630 unsigned char buf[SE_INQUIRY_BUF];
631 sense_reason_t ret;
632 int p;
633
634 memset(buf, 0, SE_INQUIRY_BUF);
635
636 if (dev == tpg->tpg_virt_lun0.lun_se_dev)
637 buf[0] = 0x3f; /* Not connected */
638 else
639 buf[0] = dev->transport->get_device_type(dev);
640
641 if (!(cdb[1] & 0x1)) {
642 if (cdb[2]) {
643 pr_err("INQUIRY with EVPD==0 but PAGE CODE=%02x\n",
644 cdb[2]);
645 ret = TCM_INVALID_CDB_FIELD;
646 goto out;
647 }
648
649 ret = spc_emulate_inquiry_std(cmd, buf);
650 goto out;
651 }
652
653 for (p = 0; p < ARRAY_SIZE(evpd_handlers); ++p) {
654 if (cdb[2] == evpd_handlers[p].page) {
655 buf[1] = cdb[2];
656 ret = evpd_handlers[p].emulate(cmd, buf);
657 goto out;
658 }
659 }
660
661 pr_err("Unknown VPD Code: 0x%02x\n", cdb[2]);
662 ret = TCM_INVALID_CDB_FIELD;
663
664 out:
665 rbuf = transport_kmap_data_sg(cmd);
666 if (rbuf) {
667 memcpy(rbuf, buf, min_t(u32, sizeof(buf), cmd->data_length));
668 transport_kunmap_data_sg(cmd);
669 }
670
671 if (!ret)
672 target_complete_cmd(cmd, GOOD);
673 return ret;
674 }
675
676 static int spc_modesense_rwrecovery(struct se_device *dev, u8 pc, u8 *p)
677 {
678 p[0] = 0x01;
679 p[1] = 0x0a;
680
681 /* No changeable values for now */
682 if (pc == 1)
683 goto out;
684
685 out:
686 return 12;
687 }
688
689 static int spc_modesense_control(struct se_device *dev, u8 pc, u8 *p)
690 {
691 p[0] = 0x0a;
692 p[1] = 0x0a;
693
694 /* No changeable values for now */
695 if (pc == 1)
696 goto out;
697
698 p[2] = 2;
699 /*
700 * From spc4r23, 7.4.7 Control mode page
701 *
702 * The QUEUE ALGORITHM MODIFIER field (see table 368) specifies
703 * restrictions on the algorithm used for reordering commands
704 * having the SIMPLE task attribute (see SAM-4).
705 *
706 * Table 368 -- QUEUE ALGORITHM MODIFIER field
707 * Code Description
708 * 0h Restricted reordering
709 * 1h Unrestricted reordering allowed
710 * 2h to 7h Reserved
711 * 8h to Fh Vendor specific
712 *
713 * A value of zero in the QUEUE ALGORITHM MODIFIER field specifies that
714 * the device server shall order the processing sequence of commands
715 * having the SIMPLE task attribute such that data integrity is maintained
716 * for that I_T nexus (i.e., if the transmission of new SCSI transport protocol
717 * requests is halted at any time, the final value of all data observable
718 * on the medium shall be the same as if all the commands had been processed
719 * with the ORDERED task attribute).
720 *
721 * A value of one in the QUEUE ALGORITHM MODIFIER field specifies that the
722 * device server may reorder the processing sequence of commands having the
723 * SIMPLE task attribute in any manner. Any data integrity exposures related to
724 * command sequence order shall be explicitly handled by the application client
725 * through the selection of appropriate ommands and task attributes.
726 */
727 p[3] = (dev->dev_attrib.emulate_rest_reord == 1) ? 0x00 : 0x10;
728 /*
729 * From spc4r17, section 7.4.6 Control mode Page
730 *
731 * Unit Attention interlocks control (UN_INTLCK_CTRL) to code 00b
732 *
733 * 00b: The logical unit shall clear any unit attention condition
734 * reported in the same I_T_L_Q nexus transaction as a CHECK CONDITION
735 * status and shall not establish a unit attention condition when a com-
736 * mand is completed with BUSY, TASK SET FULL, or RESERVATION CONFLICT
737 * status.
738 *
739 * 10b: The logical unit shall not clear any unit attention condition
740 * reported in the same I_T_L_Q nexus transaction as a CHECK CONDITION
741 * status and shall not establish a unit attention condition when
742 * a command is completed with BUSY, TASK SET FULL, or RESERVATION
743 * CONFLICT status.
744 *
745 * 11b a The logical unit shall not clear any unit attention condition
746 * reported in the same I_T_L_Q nexus transaction as a CHECK CONDITION
747 * status and shall establish a unit attention condition for the
748 * initiator port associated with the I_T nexus on which the BUSY,
749 * TASK SET FULL, or RESERVATION CONFLICT status is being returned.
750 * Depending on the status, the additional sense code shall be set to
751 * PREVIOUS BUSY STATUS, PREVIOUS TASK SET FULL STATUS, or PREVIOUS
752 * RESERVATION CONFLICT STATUS. Until it is cleared by a REQUEST SENSE
753 * command, a unit attention condition shall be established only once
754 * for a BUSY, TASK SET FULL, or RESERVATION CONFLICT status regardless
755 * to the number of commands completed with one of those status codes.
756 */
757 p[4] = (dev->dev_attrib.emulate_ua_intlck_ctrl == 2) ? 0x30 :
758 (dev->dev_attrib.emulate_ua_intlck_ctrl == 1) ? 0x20 : 0x00;
759 /*
760 * From spc4r17, section 7.4.6 Control mode Page
761 *
762 * Task Aborted Status (TAS) bit set to zero.
763 *
764 * A task aborted status (TAS) bit set to zero specifies that aborted
765 * tasks shall be terminated by the device server without any response
766 * to the application client. A TAS bit set to one specifies that tasks
767 * aborted by the actions of an I_T nexus other than the I_T nexus on
768 * which the command was received shall be completed with TASK ABORTED
769 * status (see SAM-4).
770 */
771 p[5] = (dev->dev_attrib.emulate_tas) ? 0x40 : 0x00;
772 p[8] = 0xff;
773 p[9] = 0xff;
774 p[11] = 30;
775
776 out:
777 return 12;
778 }
779
780 static int spc_modesense_caching(struct se_device *dev, u8 pc, u8 *p)
781 {
782 p[0] = 0x08;
783 p[1] = 0x12;
784
785 /* No changeable values for now */
786 if (pc == 1)
787 goto out;
788
789 if (spc_check_dev_wce(dev))
790 p[2] = 0x04; /* Write Cache Enable */
791 p[12] = 0x20; /* Disabled Read Ahead */
792
793 out:
794 return 20;
795 }
796
797 static int spc_modesense_informational_exceptions(struct se_device *dev, u8 pc, unsigned char *p)
798 {
799 p[0] = 0x1c;
800 p[1] = 0x0a;
801
802 /* No changeable values for now */
803 if (pc == 1)
804 goto out;
805
806 out:
807 return 12;
808 }
809
810 static struct {
811 uint8_t page;
812 uint8_t subpage;
813 int (*emulate)(struct se_device *, u8, unsigned char *);
814 } modesense_handlers[] = {
815 { .page = 0x01, .subpage = 0x00, .emulate = spc_modesense_rwrecovery },
816 { .page = 0x08, .subpage = 0x00, .emulate = spc_modesense_caching },
817 { .page = 0x0a, .subpage = 0x00, .emulate = spc_modesense_control },
818 { .page = 0x1c, .subpage = 0x00, .emulate = spc_modesense_informational_exceptions },
819 };
820
821 static void spc_modesense_write_protect(unsigned char *buf, int type)
822 {
823 /*
824 * I believe that the WP bit (bit 7) in the mode header is the same for
825 * all device types..
826 */
827 switch (type) {
828 case TYPE_DISK:
829 case TYPE_TAPE:
830 default:
831 buf[0] |= 0x80; /* WP bit */
832 break;
833 }
834 }
835
836 static void spc_modesense_dpofua(unsigned char *buf, int type)
837 {
838 switch (type) {
839 case TYPE_DISK:
840 buf[0] |= 0x10; /* DPOFUA bit */
841 break;
842 default:
843 break;
844 }
845 }
846
847 static int spc_modesense_blockdesc(unsigned char *buf, u64 blocks, u32 block_size)
848 {
849 *buf++ = 8;
850 put_unaligned_be32(min(blocks, 0xffffffffull), buf);
851 buf += 4;
852 put_unaligned_be32(block_size, buf);
853 return 9;
854 }
855
856 static int spc_modesense_long_blockdesc(unsigned char *buf, u64 blocks, u32 block_size)
857 {
858 if (blocks <= 0xffffffff)
859 return spc_modesense_blockdesc(buf + 3, blocks, block_size) + 3;
860
861 *buf++ = 1; /* LONGLBA */
862 buf += 2;
863 *buf++ = 16;
864 put_unaligned_be64(blocks, buf);
865 buf += 12;
866 put_unaligned_be32(block_size, buf);
867
868 return 17;
869 }
870
871 static sense_reason_t spc_emulate_modesense(struct se_cmd *cmd)
872 {
873 struct se_device *dev = cmd->se_dev;
874 char *cdb = cmd->t_task_cdb;
875 unsigned char buf[SE_MODE_PAGE_BUF], *rbuf;
876 int type = dev->transport->get_device_type(dev);
877 int ten = (cmd->t_task_cdb[0] == MODE_SENSE_10);
878 bool dbd = !!(cdb[1] & 0x08);
879 bool llba = ten ? !!(cdb[1] & 0x10) : false;
880 u8 pc = cdb[2] >> 6;
881 u8 page = cdb[2] & 0x3f;
882 u8 subpage = cdb[3];
883 int length = 0;
884 int ret;
885 int i;
886
887 memset(buf, 0, SE_MODE_PAGE_BUF);
888
889 /*
890 * Skip over MODE DATA LENGTH + MEDIUM TYPE fields to byte 3 for
891 * MODE_SENSE_10 and byte 2 for MODE_SENSE (6).
892 */
893 length = ten ? 3 : 2;
894
895 /* DEVICE-SPECIFIC PARAMETER */
896 if ((cmd->se_lun->lun_access & TRANSPORT_LUNFLAGS_READ_ONLY) ||
897 (cmd->se_deve &&
898 (cmd->se_deve->lun_flags & TRANSPORT_LUNFLAGS_READ_ONLY)))
899 spc_modesense_write_protect(&buf[length], type);
900
901 if ((spc_check_dev_wce(dev)) &&
902 (dev->dev_attrib.emulate_fua_write > 0))
903 spc_modesense_dpofua(&buf[length], type);
904
905 ++length;
906
907 /* BLOCK DESCRIPTOR */
908
909 /*
910 * For now we only include a block descriptor for disk (SBC)
911 * devices; other command sets use a slightly different format.
912 */
913 if (!dbd && type == TYPE_DISK) {
914 u64 blocks = dev->transport->get_blocks(dev);
915 u32 block_size = dev->dev_attrib.block_size;
916
917 if (ten) {
918 if (llba) {
919 length += spc_modesense_long_blockdesc(&buf[length],
920 blocks, block_size);
921 } else {
922 length += 3;
923 length += spc_modesense_blockdesc(&buf[length],
924 blocks, block_size);
925 }
926 } else {
927 length += spc_modesense_blockdesc(&buf[length], blocks,
928 block_size);
929 }
930 } else {
931 if (ten)
932 length += 4;
933 else
934 length += 1;
935 }
936
937 if (page == 0x3f) {
938 if (subpage != 0x00 && subpage != 0xff) {
939 pr_warn("MODE_SENSE: Invalid subpage code: 0x%02x\n", subpage);
940 return TCM_INVALID_CDB_FIELD;
941 }
942
943 for (i = 0; i < ARRAY_SIZE(modesense_handlers); ++i) {
944 /*
945 * Tricky way to say all subpage 00h for
946 * subpage==0, all subpages for subpage==0xff
947 * (and we just checked above that those are
948 * the only two possibilities).
949 */
950 if ((modesense_handlers[i].subpage & ~subpage) == 0) {
951 ret = modesense_handlers[i].emulate(dev, pc, &buf[length]);
952 if (!ten && length + ret >= 255)
953 break;
954 length += ret;
955 }
956 }
957
958 goto set_length;
959 }
960
961 for (i = 0; i < ARRAY_SIZE(modesense_handlers); ++i)
962 if (modesense_handlers[i].page == page &&
963 modesense_handlers[i].subpage == subpage) {
964 length += modesense_handlers[i].emulate(dev, pc, &buf[length]);
965 goto set_length;
966 }
967
968 /*
969 * We don't intend to implement:
970 * - obsolete page 03h "format parameters" (checked by Solaris)
971 */
972 if (page != 0x03)
973 pr_err("MODE SENSE: unimplemented page/subpage: 0x%02x/0x%02x\n",
974 page, subpage);
975
976 return TCM_UNKNOWN_MODE_PAGE;
977
978 set_length:
979 if (ten)
980 put_unaligned_be16(length - 2, buf);
981 else
982 buf[0] = length - 1;
983
984 rbuf = transport_kmap_data_sg(cmd);
985 if (rbuf) {
986 memcpy(rbuf, buf, min_t(u32, SE_MODE_PAGE_BUF, cmd->data_length));
987 transport_kunmap_data_sg(cmd);
988 }
989
990 target_complete_cmd(cmd, GOOD);
991 return 0;
992 }
993
994 static sense_reason_t spc_emulate_modeselect(struct se_cmd *cmd)
995 {
996 struct se_device *dev = cmd->se_dev;
997 char *cdb = cmd->t_task_cdb;
998 bool ten = cdb[0] == MODE_SELECT_10;
999 int off = ten ? 8 : 4;
1000 bool pf = !!(cdb[1] & 0x10);
1001 u8 page, subpage;
1002 unsigned char *buf;
1003 unsigned char tbuf[SE_MODE_PAGE_BUF];
1004 int length;
1005 int ret = 0;
1006 int i;
1007
1008 if (!cmd->data_length) {
1009 target_complete_cmd(cmd, GOOD);
1010 return 0;
1011 }
1012
1013 if (cmd->data_length < off + 2)
1014 return TCM_PARAMETER_LIST_LENGTH_ERROR;
1015
1016 buf = transport_kmap_data_sg(cmd);
1017 if (!buf)
1018 return TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE;
1019
1020 if (!pf) {
1021 ret = TCM_INVALID_CDB_FIELD;
1022 goto out;
1023 }
1024
1025 page = buf[off] & 0x3f;
1026 subpage = buf[off] & 0x40 ? buf[off + 1] : 0;
1027
1028 for (i = 0; i < ARRAY_SIZE(modesense_handlers); ++i)
1029 if (modesense_handlers[i].page == page &&
1030 modesense_handlers[i].subpage == subpage) {
1031 memset(tbuf, 0, SE_MODE_PAGE_BUF);
1032 length = modesense_handlers[i].emulate(dev, 0, tbuf);
1033 goto check_contents;
1034 }
1035
1036 ret = TCM_UNKNOWN_MODE_PAGE;
1037 goto out;
1038
1039 check_contents:
1040 if (cmd->data_length < off + length) {
1041 ret = TCM_PARAMETER_LIST_LENGTH_ERROR;
1042 goto out;
1043 }
1044
1045 if (memcmp(buf + off, tbuf, length))
1046 ret = TCM_INVALID_PARAMETER_LIST;
1047
1048 out:
1049 transport_kunmap_data_sg(cmd);
1050
1051 if (!ret)
1052 target_complete_cmd(cmd, GOOD);
1053 return ret;
1054 }
1055
1056 static sense_reason_t spc_emulate_request_sense(struct se_cmd *cmd)
1057 {
1058 unsigned char *cdb = cmd->t_task_cdb;
1059 unsigned char *rbuf;
1060 u8 ua_asc = 0, ua_ascq = 0;
1061 unsigned char buf[SE_SENSE_BUF];
1062
1063 memset(buf, 0, SE_SENSE_BUF);
1064
1065 if (cdb[1] & 0x01) {
1066 pr_err("REQUEST_SENSE description emulation not"
1067 " supported\n");
1068 return TCM_INVALID_CDB_FIELD;
1069 }
1070
1071 rbuf = transport_kmap_data_sg(cmd);
1072 if (!rbuf)
1073 return TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE;
1074
1075 if (!core_scsi3_ua_clear_for_request_sense(cmd, &ua_asc, &ua_ascq)) {
1076 /*
1077 * CURRENT ERROR, UNIT ATTENTION
1078 */
1079 buf[0] = 0x70;
1080 buf[SPC_SENSE_KEY_OFFSET] = UNIT_ATTENTION;
1081
1082 /*
1083 * The Additional Sense Code (ASC) from the UNIT ATTENTION
1084 */
1085 buf[SPC_ASC_KEY_OFFSET] = ua_asc;
1086 buf[SPC_ASCQ_KEY_OFFSET] = ua_ascq;
1087 buf[7] = 0x0A;
1088 } else {
1089 /*
1090 * CURRENT ERROR, NO SENSE
1091 */
1092 buf[0] = 0x70;
1093 buf[SPC_SENSE_KEY_OFFSET] = NO_SENSE;
1094
1095 /*
1096 * NO ADDITIONAL SENSE INFORMATION
1097 */
1098 buf[SPC_ASC_KEY_OFFSET] = 0x00;
1099 buf[7] = 0x0A;
1100 }
1101
1102 memcpy(rbuf, buf, min_t(u32, sizeof(buf), cmd->data_length));
1103 transport_kunmap_data_sg(cmd);
1104
1105 target_complete_cmd(cmd, GOOD);
1106 return 0;
1107 }
1108
1109 sense_reason_t spc_emulate_report_luns(struct se_cmd *cmd)
1110 {
1111 struct se_dev_entry *deve;
1112 struct se_session *sess = cmd->se_sess;
1113 unsigned char *buf;
1114 u32 lun_count = 0, offset = 8, i;
1115
1116 if (cmd->data_length < 16) {
1117 pr_warn("REPORT LUNS allocation length %u too small\n",
1118 cmd->data_length);
1119 return TCM_INVALID_CDB_FIELD;
1120 }
1121
1122 buf = transport_kmap_data_sg(cmd);
1123 if (!buf)
1124 return TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE;
1125
1126 /*
1127 * If no struct se_session pointer is present, this struct se_cmd is
1128 * coming via a target_core_mod PASSTHROUGH op, and not through
1129 * a $FABRIC_MOD. In that case, report LUN=0 only.
1130 */
1131 if (!sess) {
1132 int_to_scsilun(0, (struct scsi_lun *)&buf[offset]);
1133 lun_count = 1;
1134 goto done;
1135 }
1136
1137 spin_lock_irq(&sess->se_node_acl->device_list_lock);
1138 for (i = 0; i < TRANSPORT_MAX_LUNS_PER_TPG; i++) {
1139 deve = sess->se_node_acl->device_list[i];
1140 if (!(deve->lun_flags & TRANSPORT_LUNFLAGS_INITIATOR_ACCESS))
1141 continue;
1142 /*
1143 * We determine the correct LUN LIST LENGTH even once we
1144 * have reached the initial allocation length.
1145 * See SPC2-R20 7.19.
1146 */
1147 lun_count++;
1148 if ((offset + 8) > cmd->data_length)
1149 continue;
1150
1151 int_to_scsilun(deve->mapped_lun, (struct scsi_lun *)&buf[offset]);
1152 offset += 8;
1153 }
1154 spin_unlock_irq(&sess->se_node_acl->device_list_lock);
1155
1156 /*
1157 * See SPC3 r07, page 159.
1158 */
1159 done:
1160 lun_count *= 8;
1161 buf[0] = ((lun_count >> 24) & 0xff);
1162 buf[1] = ((lun_count >> 16) & 0xff);
1163 buf[2] = ((lun_count >> 8) & 0xff);
1164 buf[3] = (lun_count & 0xff);
1165 transport_kunmap_data_sg(cmd);
1166
1167 target_complete_cmd(cmd, GOOD);
1168 return 0;
1169 }
1170 EXPORT_SYMBOL(spc_emulate_report_luns);
1171
1172 static sense_reason_t
1173 spc_emulate_testunitready(struct se_cmd *cmd)
1174 {
1175 target_complete_cmd(cmd, GOOD);
1176 return 0;
1177 }
1178
1179 sense_reason_t
1180 spc_parse_cdb(struct se_cmd *cmd, unsigned int *size)
1181 {
1182 struct se_device *dev = cmd->se_dev;
1183 unsigned char *cdb = cmd->t_task_cdb;
1184
1185 switch (cdb[0]) {
1186 case MODE_SELECT:
1187 *size = cdb[4];
1188 cmd->execute_cmd = spc_emulate_modeselect;
1189 break;
1190 case MODE_SELECT_10:
1191 *size = (cdb[7] << 8) + cdb[8];
1192 cmd->execute_cmd = spc_emulate_modeselect;
1193 break;
1194 case MODE_SENSE:
1195 *size = cdb[4];
1196 cmd->execute_cmd = spc_emulate_modesense;
1197 break;
1198 case MODE_SENSE_10:
1199 *size = (cdb[7] << 8) + cdb[8];
1200 cmd->execute_cmd = spc_emulate_modesense;
1201 break;
1202 case LOG_SELECT:
1203 case LOG_SENSE:
1204 *size = (cdb[7] << 8) + cdb[8];
1205 break;
1206 case PERSISTENT_RESERVE_IN:
1207 *size = (cdb[7] << 8) + cdb[8];
1208 cmd->execute_cmd = target_scsi3_emulate_pr_in;
1209 break;
1210 case PERSISTENT_RESERVE_OUT:
1211 *size = (cdb[7] << 8) + cdb[8];
1212 cmd->execute_cmd = target_scsi3_emulate_pr_out;
1213 break;
1214 case RELEASE:
1215 case RELEASE_10:
1216 if (cdb[0] == RELEASE_10)
1217 *size = (cdb[7] << 8) | cdb[8];
1218 else
1219 *size = cmd->data_length;
1220
1221 cmd->execute_cmd = target_scsi2_reservation_release;
1222 break;
1223 case RESERVE:
1224 case RESERVE_10:
1225 /*
1226 * The SPC-2 RESERVE does not contain a size in the SCSI CDB.
1227 * Assume the passthrough or $FABRIC_MOD will tell us about it.
1228 */
1229 if (cdb[0] == RESERVE_10)
1230 *size = (cdb[7] << 8) | cdb[8];
1231 else
1232 *size = cmd->data_length;
1233
1234 cmd->execute_cmd = target_scsi2_reservation_reserve;
1235 break;
1236 case REQUEST_SENSE:
1237 *size = cdb[4];
1238 cmd->execute_cmd = spc_emulate_request_sense;
1239 break;
1240 case INQUIRY:
1241 *size = (cdb[3] << 8) + cdb[4];
1242
1243 /*
1244 * Do implict HEAD_OF_QUEUE processing for INQUIRY.
1245 * See spc4r17 section 5.3
1246 */
1247 cmd->sam_task_attr = MSG_HEAD_TAG;
1248 cmd->execute_cmd = spc_emulate_inquiry;
1249 break;
1250 case SECURITY_PROTOCOL_IN:
1251 case SECURITY_PROTOCOL_OUT:
1252 *size = (cdb[6] << 24) | (cdb[7] << 16) | (cdb[8] << 8) | cdb[9];
1253 break;
1254 case EXTENDED_COPY:
1255 case READ_ATTRIBUTE:
1256 case RECEIVE_COPY_RESULTS:
1257 case WRITE_ATTRIBUTE:
1258 *size = (cdb[10] << 24) | (cdb[11] << 16) |
1259 (cdb[12] << 8) | cdb[13];
1260 break;
1261 case RECEIVE_DIAGNOSTIC:
1262 case SEND_DIAGNOSTIC:
1263 *size = (cdb[3] << 8) | cdb[4];
1264 break;
1265 case WRITE_BUFFER:
1266 *size = (cdb[6] << 16) + (cdb[7] << 8) + cdb[8];
1267 break;
1268 case REPORT_LUNS:
1269 cmd->execute_cmd = spc_emulate_report_luns;
1270 *size = (cdb[6] << 24) | (cdb[7] << 16) | (cdb[8] << 8) | cdb[9];
1271 /*
1272 * Do implict HEAD_OF_QUEUE processing for REPORT_LUNS
1273 * See spc4r17 section 5.3
1274 */
1275 cmd->sam_task_attr = MSG_HEAD_TAG;
1276 break;
1277 case TEST_UNIT_READY:
1278 cmd->execute_cmd = spc_emulate_testunitready;
1279 *size = 0;
1280 break;
1281 case MAINTENANCE_IN:
1282 if (dev->transport->get_device_type(dev) != TYPE_ROM) {
1283 /*
1284 * MAINTENANCE_IN from SCC-2
1285 * Check for emulated MI_REPORT_TARGET_PGS
1286 */
1287 if ((cdb[1] & 0x1f) == MI_REPORT_TARGET_PGS) {
1288 cmd->execute_cmd =
1289 target_emulate_report_target_port_groups;
1290 }
1291 *size = get_unaligned_be32(&cdb[6]);
1292 } else {
1293 /*
1294 * GPCMD_SEND_KEY from multi media commands
1295 */
1296 *size = get_unaligned_be16(&cdb[8]);
1297 }
1298 break;
1299 case MAINTENANCE_OUT:
1300 if (dev->transport->get_device_type(dev) != TYPE_ROM) {
1301 /*
1302 * MAINTENANCE_OUT from SCC-2
1303 * Check for emulated MO_SET_TARGET_PGS.
1304 */
1305 if (cdb[1] == MO_SET_TARGET_PGS) {
1306 cmd->execute_cmd =
1307 target_emulate_set_target_port_groups;
1308 }
1309 *size = get_unaligned_be32(&cdb[6]);
1310 } else {
1311 /*
1312 * GPCMD_SEND_KEY from multi media commands
1313 */
1314 *size = get_unaligned_be16(&cdb[8]);
1315 }
1316 break;
1317 default:
1318 pr_warn("TARGET_CORE[%s]: Unsupported SCSI Opcode"
1319 " 0x%02x, sending CHECK_CONDITION.\n",
1320 cmd->se_tfo->get_fabric_name(), cdb[0]);
1321 return TCM_UNSUPPORTED_SCSI_OPCODE;
1322 }
1323
1324 return 0;
1325 }
1326 EXPORT_SYMBOL(spc_parse_cdb);
Linux kernel - Deliverables
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