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1// SPDX-License-Identifier: GPL-2.0-or-later
2/*
3 * SCSI Primary Commands (SPC) parsing and emulation.
4 *
5 * (c) Copyright 2002-2013 Datera, Inc.
6 *
7 * Nicholas A. Bellinger <nab@kernel.org>
8 */
9
10#include <linux/kernel.h>
11#include <linux/module.h>
12#include <asm/unaligned.h>
13
14#include <scsi/scsi_proto.h>
15#include <scsi/scsi_common.h>
16#include <scsi/scsi_tcq.h>
17
18#include <target/target_core_base.h>
19#include <target/target_core_backend.h>
20#include <target/target_core_fabric.h>
21
22#include "target_core_internal.h"
23#include "target_core_alua.h"
24#include "target_core_pr.h"
25#include "target_core_ua.h"
26#include "target_core_xcopy.h"
27
28static void spc_fill_alua_data(struct se_lun *lun, unsigned char *buf)
29{
30 struct t10_alua_tg_pt_gp *tg_pt_gp;
31
32 /*
33 * Set SCCS for MAINTENANCE_IN + REPORT_TARGET_PORT_GROUPS.
34 */
35 buf[5] = 0x80;
36
37 /*
38 * Set TPGS field for explicit and/or implicit ALUA access type
39 * and opteration.
40 *
41 * See spc4r17 section 6.4.2 Table 135
42 */
43 rcu_read_lock();
44 tg_pt_gp = rcu_dereference(lun->lun_tg_pt_gp);
45 if (tg_pt_gp)
46 buf[5] |= tg_pt_gp->tg_pt_gp_alua_access_type;
47 rcu_read_unlock();
48}
49
50static u16
51spc_find_scsi_transport_vd(int proto_id)
52{
53 switch (proto_id) {
54 case SCSI_PROTOCOL_FCP:
55 return SCSI_VERSION_DESCRIPTOR_FCP4;
56 case SCSI_PROTOCOL_ISCSI:
57 return SCSI_VERSION_DESCRIPTOR_ISCSI;
58 case SCSI_PROTOCOL_SAS:
59 return SCSI_VERSION_DESCRIPTOR_SAS3;
60 case SCSI_PROTOCOL_SBP:
61 return SCSI_VERSION_DESCRIPTOR_SBP3;
62 case SCSI_PROTOCOL_SRP:
63 return SCSI_VERSION_DESCRIPTOR_SRP;
64 default:
65 pr_warn("Cannot find VERSION DESCRIPTOR value for unknown SCSI"
66 " transport PROTOCOL IDENTIFIER %#x\n", proto_id);
67 return 0;
68 }
69}
70
71sense_reason_t
72spc_emulate_inquiry_std(struct se_cmd *cmd, unsigned char *buf)
73{
74 struct se_lun *lun = cmd->se_lun;
75 struct se_portal_group *tpg = lun->lun_tpg;
76 struct se_device *dev = cmd->se_dev;
77 struct se_session *sess = cmd->se_sess;
78
79 /* Set RMB (removable media) for tape devices */
80 if (dev->transport->get_device_type(dev) == TYPE_TAPE)
81 buf[1] = 0x80;
82
83 buf[2] = 0x06; /* SPC-4 */
84
85 /*
86 * NORMACA and HISUP = 0, RESPONSE DATA FORMAT = 2
87 *
88 * SPC4 says:
89 * A RESPONSE DATA FORMAT field set to 2h indicates that the
90 * standard INQUIRY data is in the format defined in this
91 * standard. Response data format values less than 2h are
92 * obsolete. Response data format values greater than 2h are
93 * reserved.
94 */
95 buf[3] = 2;
96
97 /*
98 * Enable SCCS and TPGS fields for Emulated ALUA
99 */
100 spc_fill_alua_data(lun, buf);
101
102 /*
103 * Set Third-Party Copy (3PC) bit to indicate support for EXTENDED_COPY
104 */
105 if (dev->dev_attrib.emulate_3pc)
106 buf[5] |= 0x8;
107 /*
108 * Set Protection (PROTECT) bit when DIF has been enabled on the
109 * device, and the fabric supports VERIFY + PASS. Also report
110 * PROTECT=1 if sess_prot_type has been configured to allow T10-PI
111 * to unprotected devices.
112 */
113 if (sess->sup_prot_ops & (TARGET_PROT_DIN_PASS | TARGET_PROT_DOUT_PASS)) {
114 if (dev->dev_attrib.pi_prot_type || cmd->se_sess->sess_prot_type)
115 buf[5] |= 0x1;
116 }
117
118 /*
119 * Set MULTIP bit to indicate presence of multiple SCSI target ports
120 */
121 if (dev->export_count > 1)
122 buf[6] |= 0x10;
123
124 buf[7] = 0x2; /* CmdQue=1 */
125
126 /*
127 * ASCII data fields described as being left-aligned shall have any
128 * unused bytes at the end of the field (i.e., highest offset) and the
129 * unused bytes shall be filled with ASCII space characters (20h).
130 */
131 memset(&buf[8], 0x20,
132 INQUIRY_VENDOR_LEN + INQUIRY_MODEL_LEN + INQUIRY_REVISION_LEN);
133 memcpy(&buf[8], dev->t10_wwn.vendor,
134 strnlen(dev->t10_wwn.vendor, INQUIRY_VENDOR_LEN));
135 memcpy(&buf[16], dev->t10_wwn.model,
136 strnlen(dev->t10_wwn.model, INQUIRY_MODEL_LEN));
137 memcpy(&buf[32], dev->t10_wwn.revision,
138 strnlen(dev->t10_wwn.revision, INQUIRY_REVISION_LEN));
139
140 /*
141 * Set the VERSION DESCRIPTOR fields
142 */
143 put_unaligned_be16(SCSI_VERSION_DESCRIPTOR_SAM5, &buf[58]);
144 put_unaligned_be16(spc_find_scsi_transport_vd(tpg->proto_id), &buf[60]);
145 put_unaligned_be16(SCSI_VERSION_DESCRIPTOR_SPC4, &buf[62]);
146 if (cmd->se_dev->transport->get_device_type(dev) == TYPE_DISK)
147 put_unaligned_be16(SCSI_VERSION_DESCRIPTOR_SBC3, &buf[64]);
148
149 buf[4] = 91; /* Set additional length to 91 */
150
151 return 0;
152}
153EXPORT_SYMBOL(spc_emulate_inquiry_std);
154
155/* unit serial number */
156static sense_reason_t
157spc_emulate_evpd_80(struct se_cmd *cmd, unsigned char *buf)
158{
159 struct se_device *dev = cmd->se_dev;
160 u16 len;
161
162 if (dev->dev_flags & DF_EMULATED_VPD_UNIT_SERIAL) {
163 len = sprintf(&buf[4], "%s", dev->t10_wwn.unit_serial);
164 len++; /* Extra Byte for NULL Terminator */
165 buf[3] = len;
166 }
167 return 0;
168}
169
170/*
171 * Generate NAA IEEE Registered Extended designator
172 */
173void spc_gen_naa_6h_vendor_specific(struct se_device *dev,
174 unsigned char *buf)
175{
176 unsigned char *p = &dev->t10_wwn.unit_serial[0];
177 u32 company_id = dev->t10_wwn.company_id;
178 int cnt, off = 0;
179 bool next = true;
180
181 /*
182 * Start NAA IEEE Registered Extended Identifier/Designator
183 */
184 buf[off] = 0x6 << 4;
185
186 /* IEEE COMPANY_ID */
187 buf[off++] |= (company_id >> 20) & 0xf;
188 buf[off++] = (company_id >> 12) & 0xff;
189 buf[off++] = (company_id >> 4) & 0xff;
190 buf[off] = (company_id & 0xf) << 4;
191
192 /*
193 * Generate up to 36 bits of VENDOR SPECIFIC IDENTIFIER starting on
194 * byte 3 bit 3-0 for NAA IEEE Registered Extended DESIGNATOR field
195 * format, followed by 64 bits of VENDOR SPECIFIC IDENTIFIER EXTENSION
196 * to complete the payload. These are based from VPD=0x80 PRODUCT SERIAL
197 * NUMBER set via vpd_unit_serial in target_core_configfs.c to ensure
198 * per device uniqeness.
199 */
200 for (cnt = off + 13; *p && off < cnt; p++) {
201 int val = hex_to_bin(*p);
202
203 if (val < 0)
204 continue;
205
206 if (next) {
207 next = false;
208 buf[off++] |= val;
209 } else {
210 next = true;
211 buf[off] = val << 4;
212 }
213 }
214}
215
216/*
217 * Device identification VPD, for a complete list of
218 * DESIGNATOR TYPEs see spc4r17 Table 459.
219 */
220sense_reason_t
221spc_emulate_evpd_83(struct se_cmd *cmd, unsigned char *buf)
222{
223 struct se_device *dev = cmd->se_dev;
224 struct se_lun *lun = cmd->se_lun;
225 struct se_portal_group *tpg = NULL;
226 struct t10_alua_lu_gp_member *lu_gp_mem;
227 struct t10_alua_tg_pt_gp *tg_pt_gp;
228 unsigned char *prod = &dev->t10_wwn.model[0];
229 u32 prod_len;
230 u32 off = 0;
231 u16 len = 0, id_len;
232
233 off = 4;
234
235 /*
236 * NAA IEEE Registered Extended Assigned designator format, see
237 * spc4r17 section 7.7.3.6.5
238 *
239 * We depend upon a target_core_mod/ConfigFS provided
240 * /sys/kernel/config/target/core/$HBA/$DEV/wwn/vpd_unit_serial
241 * value in order to return the NAA id.
242 */
243 if (!(dev->dev_flags & DF_EMULATED_VPD_UNIT_SERIAL))
244 goto check_t10_vend_desc;
245
246 /* CODE SET == Binary */
247 buf[off++] = 0x1;
248
249 /* Set ASSOCIATION == addressed logical unit: 0)b */
250 buf[off] = 0x00;
251
252 /* Identifier/Designator type == NAA identifier */
253 buf[off++] |= 0x3;
254 off++;
255
256 /* Identifier/Designator length */
257 buf[off++] = 0x10;
258
259 /* NAA IEEE Registered Extended designator */
260 spc_gen_naa_6h_vendor_specific(dev, &buf[off]);
261
262 len = 20;
263 off = (len + 4);
264
265check_t10_vend_desc:
266 /*
267 * T10 Vendor Identifier Page, see spc4r17 section 7.7.3.4
268 */
269 id_len = 8; /* For Vendor field */
270 prod_len = 4; /* For VPD Header */
271 prod_len += 8; /* For Vendor field */
272 prod_len += strlen(prod);
273 prod_len++; /* For : */
274
275 if (dev->dev_flags & DF_EMULATED_VPD_UNIT_SERIAL)
276 id_len += sprintf(&buf[off+12], "%s:%s", prod,
277 &dev->t10_wwn.unit_serial[0]);
278 buf[off] = 0x2; /* ASCII */
279 buf[off+1] = 0x1; /* T10 Vendor ID */
280 buf[off+2] = 0x0;
281 /* left align Vendor ID and pad with spaces */
282 memset(&buf[off+4], 0x20, INQUIRY_VENDOR_LEN);
283 memcpy(&buf[off+4], dev->t10_wwn.vendor,
284 strnlen(dev->t10_wwn.vendor, INQUIRY_VENDOR_LEN));
285 /* Extra Byte for NULL Terminator */
286 id_len++;
287 /* Identifier Length */
288 buf[off+3] = id_len;
289 /* Header size for Designation descriptor */
290 len += (id_len + 4);
291 off += (id_len + 4);
292
293 if (1) {
294 struct t10_alua_lu_gp *lu_gp;
295 u32 padding, scsi_name_len, scsi_target_len;
296 u16 lu_gp_id = 0;
297 u16 tg_pt_gp_id = 0;
298 u16 tpgt;
299
300 tpg = lun->lun_tpg;
301 /*
302 * Relative target port identifer, see spc4r17
303 * section 7.7.3.7
304 *
305 * Get the PROTOCOL IDENTIFIER as defined by spc4r17
306 * section 7.5.1 Table 362
307 */
308 buf[off] = tpg->proto_id << 4;
309 buf[off++] |= 0x1; /* CODE SET == Binary */
310 buf[off] = 0x80; /* Set PIV=1 */
311 /* Set ASSOCIATION == target port: 01b */
312 buf[off] |= 0x10;
313 /* DESIGNATOR TYPE == Relative target port identifer */
314 buf[off++] |= 0x4;
315 off++; /* Skip over Reserved */
316 buf[off++] = 4; /* DESIGNATOR LENGTH */
317 /* Skip over Obsolete field in RTPI payload
318 * in Table 472 */
319 off += 2;
320 put_unaligned_be16(lun->lun_rtpi, &buf[off]);
321 off += 2;
322 len += 8; /* Header size + Designation descriptor */
323 /*
324 * Target port group identifier, see spc4r17
325 * section 7.7.3.8
326 *
327 * Get the PROTOCOL IDENTIFIER as defined by spc4r17
328 * section 7.5.1 Table 362
329 */
330 rcu_read_lock();
331 tg_pt_gp = rcu_dereference(lun->lun_tg_pt_gp);
332 if (!tg_pt_gp) {
333 rcu_read_unlock();
334 goto check_lu_gp;
335 }
336 tg_pt_gp_id = tg_pt_gp->tg_pt_gp_id;
337 rcu_read_unlock();
338
339 buf[off] = tpg->proto_id << 4;
340 buf[off++] |= 0x1; /* CODE SET == Binary */
341 buf[off] = 0x80; /* Set PIV=1 */
342 /* Set ASSOCIATION == target port: 01b */
343 buf[off] |= 0x10;
344 /* DESIGNATOR TYPE == Target port group identifier */
345 buf[off++] |= 0x5;
346 off++; /* Skip over Reserved */
347 buf[off++] = 4; /* DESIGNATOR LENGTH */
348 off += 2; /* Skip over Reserved Field */
349 put_unaligned_be16(tg_pt_gp_id, &buf[off]);
350 off += 2;
351 len += 8; /* Header size + Designation descriptor */
352 /*
353 * Logical Unit Group identifier, see spc4r17
354 * section 7.7.3.8
355 */
356check_lu_gp:
357 lu_gp_mem = dev->dev_alua_lu_gp_mem;
358 if (!lu_gp_mem)
359 goto check_scsi_name;
360
361 spin_lock(&lu_gp_mem->lu_gp_mem_lock);
362 lu_gp = lu_gp_mem->lu_gp;
363 if (!lu_gp) {
364 spin_unlock(&lu_gp_mem->lu_gp_mem_lock);
365 goto check_scsi_name;
366 }
367 lu_gp_id = lu_gp->lu_gp_id;
368 spin_unlock(&lu_gp_mem->lu_gp_mem_lock);
369
370 buf[off++] |= 0x1; /* CODE SET == Binary */
371 /* DESIGNATOR TYPE == Logical Unit Group identifier */
372 buf[off++] |= 0x6;
373 off++; /* Skip over Reserved */
374 buf[off++] = 4; /* DESIGNATOR LENGTH */
375 off += 2; /* Skip over Reserved Field */
376 put_unaligned_be16(lu_gp_id, &buf[off]);
377 off += 2;
378 len += 8; /* Header size + Designation descriptor */
379 /*
380 * SCSI name string designator, see spc4r17
381 * section 7.7.3.11
382 *
383 * Get the PROTOCOL IDENTIFIER as defined by spc4r17
384 * section 7.5.1 Table 362
385 */
386check_scsi_name:
387 buf[off] = tpg->proto_id << 4;
388 buf[off++] |= 0x3; /* CODE SET == UTF-8 */
389 buf[off] = 0x80; /* Set PIV=1 */
390 /* Set ASSOCIATION == target port: 01b */
391 buf[off] |= 0x10;
392 /* DESIGNATOR TYPE == SCSI name string */
393 buf[off++] |= 0x8;
394 off += 2; /* Skip over Reserved and length */
395 /*
396 * SCSI name string identifer containing, $FABRIC_MOD
397 * dependent information. For LIO-Target and iSCSI
398 * Target Port, this means "<iSCSI name>,t,0x<TPGT> in
399 * UTF-8 encoding.
400 */
401 tpgt = tpg->se_tpg_tfo->tpg_get_tag(tpg);
402 scsi_name_len = sprintf(&buf[off], "%s,t,0x%04x",
403 tpg->se_tpg_tfo->tpg_get_wwn(tpg), tpgt);
404 scsi_name_len += 1 /* Include NULL terminator */;
405 /*
406 * The null-terminated, null-padded (see 4.4.2) SCSI
407 * NAME STRING field contains a UTF-8 format string.
408 * The number of bytes in the SCSI NAME STRING field
409 * (i.e., the value in the DESIGNATOR LENGTH field)
410 * shall be no larger than 256 and shall be a multiple
411 * of four.
412 */
413 padding = ((-scsi_name_len) & 3);
414 if (padding)
415 scsi_name_len += padding;
416 if (scsi_name_len > 256)
417 scsi_name_len = 256;
418
419 buf[off-1] = scsi_name_len;
420 off += scsi_name_len;
421 /* Header size + Designation descriptor */
422 len += (scsi_name_len + 4);
423
424 /*
425 * Target device designator
426 */
427 buf[off] = tpg->proto_id << 4;
428 buf[off++] |= 0x3; /* CODE SET == UTF-8 */
429 buf[off] = 0x80; /* Set PIV=1 */
430 /* Set ASSOCIATION == target device: 10b */
431 buf[off] |= 0x20;
432 /* DESIGNATOR TYPE == SCSI name string */
433 buf[off++] |= 0x8;
434 off += 2; /* Skip over Reserved and length */
435 /*
436 * SCSI name string identifer containing, $FABRIC_MOD
437 * dependent information. For LIO-Target and iSCSI
438 * Target Port, this means "<iSCSI name>" in
439 * UTF-8 encoding.
440 */
441 scsi_target_len = sprintf(&buf[off], "%s",
442 tpg->se_tpg_tfo->tpg_get_wwn(tpg));
443 scsi_target_len += 1 /* Include NULL terminator */;
444 /*
445 * The null-terminated, null-padded (see 4.4.2) SCSI
446 * NAME STRING field contains a UTF-8 format string.
447 * The number of bytes in the SCSI NAME STRING field
448 * (i.e., the value in the DESIGNATOR LENGTH field)
449 * shall be no larger than 256 and shall be a multiple
450 * of four.
451 */
452 padding = ((-scsi_target_len) & 3);
453 if (padding)
454 scsi_target_len += padding;
455 if (scsi_target_len > 256)
456 scsi_target_len = 256;
457
458 buf[off-1] = scsi_target_len;
459 off += scsi_target_len;
460
461 /* Header size + Designation descriptor */
462 len += (scsi_target_len + 4);
463 }
464 put_unaligned_be16(len, &buf[2]); /* Page Length for VPD 0x83 */
465 return 0;
466}
467EXPORT_SYMBOL(spc_emulate_evpd_83);
468
469/* Extended INQUIRY Data VPD Page */
470static sense_reason_t
471spc_emulate_evpd_86(struct se_cmd *cmd, unsigned char *buf)
472{
473 struct se_device *dev = cmd->se_dev;
474 struct se_session *sess = cmd->se_sess;
475
476 buf[3] = 0x3c;
477 /*
478 * Set GRD_CHK + REF_CHK for TYPE1 protection, or GRD_CHK
479 * only for TYPE3 protection.
480 */
481 if (sess->sup_prot_ops & (TARGET_PROT_DIN_PASS | TARGET_PROT_DOUT_PASS)) {
482 if (dev->dev_attrib.pi_prot_type == TARGET_DIF_TYPE1_PROT ||
483 cmd->se_sess->sess_prot_type == TARGET_DIF_TYPE1_PROT)
484 buf[4] = 0x5;
485 else if (dev->dev_attrib.pi_prot_type == TARGET_DIF_TYPE3_PROT ||
486 cmd->se_sess->sess_prot_type == TARGET_DIF_TYPE3_PROT)
487 buf[4] = 0x4;
488 }
489
490 /* logical unit supports type 1 and type 3 protection */
491 if ((dev->transport->get_device_type(dev) == TYPE_DISK) &&
492 (sess->sup_prot_ops & (TARGET_PROT_DIN_PASS | TARGET_PROT_DOUT_PASS)) &&
493 (dev->dev_attrib.pi_prot_type || cmd->se_sess->sess_prot_type)) {
494 buf[4] |= (0x3 << 3);
495 }
496
497 /* Set HEADSUP, ORDSUP, SIMPSUP */
498 buf[5] = 0x07;
499
500 /* If WriteCache emulation is enabled, set V_SUP */
501 if (target_check_wce(dev))
502 buf[6] = 0x01;
503 /* If an LBA map is present set R_SUP */
504 spin_lock(&cmd->se_dev->t10_alua.lba_map_lock);
505 if (!list_empty(&dev->t10_alua.lba_map_list))
506 buf[8] = 0x10;
507 spin_unlock(&cmd->se_dev->t10_alua.lba_map_lock);
508 return 0;
509}
510
511/* Block Limits VPD page */
512static sense_reason_t
513spc_emulate_evpd_b0(struct se_cmd *cmd, unsigned char *buf)
514{
515 struct se_device *dev = cmd->se_dev;
516 u32 mtl = 0;
517 int have_tp = 0, opt, min;
518 u32 io_max_blocks;
519
520 /*
521 * Following spc3r22 section 6.5.3 Block Limits VPD page, when
522 * emulate_tpu=1 or emulate_tpws=1 we will be expect a
523 * different page length for Thin Provisioning.
524 */
525 if (dev->dev_attrib.emulate_tpu || dev->dev_attrib.emulate_tpws)
526 have_tp = 1;
527
528 buf[0] = dev->transport->get_device_type(dev);
529 buf[3] = have_tp ? 0x3c : 0x10;
530
531 /* Set WSNZ to 1 */
532 buf[4] = 0x01;
533 /*
534 * Set MAXIMUM COMPARE AND WRITE LENGTH
535 */
536 if (dev->dev_attrib.emulate_caw)
537 buf[5] = 0x01;
538
539 /*
540 * Set OPTIMAL TRANSFER LENGTH GRANULARITY
541 */
542 if (dev->transport->get_io_min && (min = dev->transport->get_io_min(dev)))
543 put_unaligned_be16(min / dev->dev_attrib.block_size, &buf[6]);
544 else
545 put_unaligned_be16(1, &buf[6]);
546
547 /*
548 * Set MAXIMUM TRANSFER LENGTH
549 *
550 * XXX: Currently assumes single PAGE_SIZE per scatterlist for fabrics
551 * enforcing maximum HW scatter-gather-list entry limit
552 */
553 if (cmd->se_tfo->max_data_sg_nents) {
554 mtl = (cmd->se_tfo->max_data_sg_nents * PAGE_SIZE) /
555 dev->dev_attrib.block_size;
556 }
557 io_max_blocks = mult_frac(dev->dev_attrib.hw_max_sectors,
558 dev->dev_attrib.hw_block_size,
559 dev->dev_attrib.block_size);
560 put_unaligned_be32(min_not_zero(mtl, io_max_blocks), &buf[8]);
561
562 /*
563 * Set OPTIMAL TRANSFER LENGTH
564 */
565 if (dev->transport->get_io_opt && (opt = dev->transport->get_io_opt(dev)))
566 put_unaligned_be32(opt / dev->dev_attrib.block_size, &buf[12]);
567 else
568 put_unaligned_be32(dev->dev_attrib.optimal_sectors, &buf[12]);
569
570 /*
571 * Exit now if we don't support TP.
572 */
573 if (!have_tp)
574 goto max_write_same;
575
576 /*
577 * Set MAXIMUM UNMAP LBA COUNT
578 */
579 put_unaligned_be32(dev->dev_attrib.max_unmap_lba_count, &buf[20]);
580
581 /*
582 * Set MAXIMUM UNMAP BLOCK DESCRIPTOR COUNT
583 */
584 put_unaligned_be32(dev->dev_attrib.max_unmap_block_desc_count,
585 &buf[24]);
586
587 /*
588 * Set OPTIMAL UNMAP GRANULARITY
589 */
590 put_unaligned_be32(dev->dev_attrib.unmap_granularity, &buf[28]);
591
592 /*
593 * UNMAP GRANULARITY ALIGNMENT
594 */
595 put_unaligned_be32(dev->dev_attrib.unmap_granularity_alignment,
596 &buf[32]);
597 if (dev->dev_attrib.unmap_granularity_alignment != 0)
598 buf[32] |= 0x80; /* Set the UGAVALID bit */
599
600 /*
601 * MAXIMUM WRITE SAME LENGTH
602 */
603max_write_same:
604 put_unaligned_be64(dev->dev_attrib.max_write_same_len, &buf[36]);
605
606 return 0;
607}
608
609/* Block Device Characteristics VPD page */
610static sense_reason_t
611spc_emulate_evpd_b1(struct se_cmd *cmd, unsigned char *buf)
612{
613 struct se_device *dev = cmd->se_dev;
614
615 buf[0] = dev->transport->get_device_type(dev);
616 buf[3] = 0x3c;
617 buf[5] = dev->dev_attrib.is_nonrot ? 1 : 0;
618
619 return 0;
620}
621
622/* Thin Provisioning VPD */
623static sense_reason_t
624spc_emulate_evpd_b2(struct se_cmd *cmd, unsigned char *buf)
625{
626 struct se_device *dev = cmd->se_dev;
627
628 /*
629 * From spc3r22 section 6.5.4 Thin Provisioning VPD page:
630 *
631 * The PAGE LENGTH field is defined in SPC-4. If the DP bit is set to
632 * zero, then the page length shall be set to 0004h. If the DP bit
633 * is set to one, then the page length shall be set to the value
634 * defined in table 162.
635 */
636 buf[0] = dev->transport->get_device_type(dev);
637
638 /*
639 * Set Hardcoded length mentioned above for DP=0
640 */
641 put_unaligned_be16(0x0004, &buf[2]);
642
643 /*
644 * The THRESHOLD EXPONENT field indicates the threshold set size in
645 * LBAs as a power of 2 (i.e., the threshold set size is equal to
646 * 2(threshold exponent)).
647 *
648 * Note that this is currently set to 0x00 as mkp says it will be
649 * changing again. We can enable this once it has settled in T10
650 * and is actually used by Linux/SCSI ML code.
651 */
652 buf[4] = 0x00;
653
654 /*
655 * A TPU bit set to one indicates that the device server supports
656 * the UNMAP command (see 5.25). A TPU bit set to zero indicates
657 * that the device server does not support the UNMAP command.
658 */
659 if (dev->dev_attrib.emulate_tpu != 0)
660 buf[5] = 0x80;
661
662 /*
663 * A TPWS bit set to one indicates that the device server supports
664 * the use of the WRITE SAME (16) command (see 5.42) to unmap LBAs.
665 * A TPWS bit set to zero indicates that the device server does not
666 * support the use of the WRITE SAME (16) command to unmap LBAs.
667 */
668 if (dev->dev_attrib.emulate_tpws != 0)
669 buf[5] |= 0x40 | 0x20;
670
671 /*
672 * The unmap_zeroes_data set means that the underlying device supports
673 * REQ_OP_DISCARD and has the discard_zeroes_data bit set. This
674 * satisfies the SBC requirements for LBPRZ, meaning that a subsequent
675 * read will return zeroes after an UNMAP or WRITE SAME (16) to an LBA
676 * See sbc4r36 6.6.4.
677 */
678 if (((dev->dev_attrib.emulate_tpu != 0) ||
679 (dev->dev_attrib.emulate_tpws != 0)) &&
680 (dev->dev_attrib.unmap_zeroes_data != 0))
681 buf[5] |= 0x04;
682
683 return 0;
684}
685
686/* Referrals VPD page */
687static sense_reason_t
688spc_emulate_evpd_b3(struct se_cmd *cmd, unsigned char *buf)
689{
690 struct se_device *dev = cmd->se_dev;
691
692 buf[0] = dev->transport->get_device_type(dev);
693 buf[3] = 0x0c;
694 put_unaligned_be32(dev->t10_alua.lba_map_segment_size, &buf[8]);
695 put_unaligned_be32(dev->t10_alua.lba_map_segment_multiplier, &buf[12]);
696
697 return 0;
698}
699
700static sense_reason_t
701spc_emulate_evpd_00(struct se_cmd *cmd, unsigned char *buf);
702
703static struct {
704 uint8_t page;
705 sense_reason_t (*emulate)(struct se_cmd *, unsigned char *);
706} evpd_handlers[] = {
707 { .page = 0x00, .emulate = spc_emulate_evpd_00 },
708 { .page = 0x80, .emulate = spc_emulate_evpd_80 },
709 { .page = 0x83, .emulate = spc_emulate_evpd_83 },
710 { .page = 0x86, .emulate = spc_emulate_evpd_86 },
711 { .page = 0xb0, .emulate = spc_emulate_evpd_b0 },
712 { .page = 0xb1, .emulate = spc_emulate_evpd_b1 },
713 { .page = 0xb2, .emulate = spc_emulate_evpd_b2 },
714 { .page = 0xb3, .emulate = spc_emulate_evpd_b3 },
715};
716
717/* supported vital product data pages */
718static sense_reason_t
719spc_emulate_evpd_00(struct se_cmd *cmd, unsigned char *buf)
720{
721 int p;
722
723 /*
724 * Only report the INQUIRY EVPD=1 pages after a valid NAA
725 * Registered Extended LUN WWN has been set via ConfigFS
726 * during device creation/restart.
727 */
728 if (cmd->se_dev->dev_flags & DF_EMULATED_VPD_UNIT_SERIAL) {
729 buf[3] = ARRAY_SIZE(evpd_handlers);
730 for (p = 0; p < ARRAY_SIZE(evpd_handlers); ++p)
731 buf[p + 4] = evpd_handlers[p].page;
732 }
733
734 return 0;
735}
736
737static sense_reason_t
738spc_emulate_inquiry(struct se_cmd *cmd)
739{
740 struct se_device *dev = cmd->se_dev;
741 unsigned char *rbuf;
742 unsigned char *cdb = cmd->t_task_cdb;
743 unsigned char *buf;
744 sense_reason_t ret;
745 int p;
746 int len = 0;
747
748 buf = kzalloc(SE_INQUIRY_BUF, GFP_KERNEL);
749 if (!buf) {
750 pr_err("Unable to allocate response buffer for INQUIRY\n");
751 return TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE;
752 }
753
754 buf[0] = dev->transport->get_device_type(dev);
755
756 if (!(cdb[1] & 0x1)) {
757 if (cdb[2]) {
758 pr_err("INQUIRY with EVPD==0 but PAGE CODE=%02x\n",
759 cdb[2]);
760 ret = TCM_INVALID_CDB_FIELD;
761 goto out;
762 }
763
764 ret = spc_emulate_inquiry_std(cmd, buf);
765 len = buf[4] + 5;
766 goto out;
767 }
768
769 for (p = 0; p < ARRAY_SIZE(evpd_handlers); ++p) {
770 if (cdb[2] == evpd_handlers[p].page) {
771 buf[1] = cdb[2];
772 ret = evpd_handlers[p].emulate(cmd, buf);
773 len = get_unaligned_be16(&buf[2]) + 4;
774 goto out;
775 }
776 }
777
778 pr_debug("Unknown VPD Code: 0x%02x\n", cdb[2]);
779 ret = TCM_INVALID_CDB_FIELD;
780
781out:
782 rbuf = transport_kmap_data_sg(cmd);
783 if (rbuf) {
784 memcpy(rbuf, buf, min_t(u32, SE_INQUIRY_BUF, cmd->data_length));
785 transport_kunmap_data_sg(cmd);
786 }
787 kfree(buf);
788
789 if (!ret)
790 target_complete_cmd_with_length(cmd, SAM_STAT_GOOD, len);
791 return ret;
792}
793
794static int spc_modesense_rwrecovery(struct se_cmd *cmd, u8 pc, u8 *p)
795{
796 p[0] = 0x01;
797 p[1] = 0x0a;
798
799 /* No changeable values for now */
800 if (pc == 1)
801 goto out;
802
803out:
804 return 12;
805}
806
807static int spc_modesense_control(struct se_cmd *cmd, u8 pc, u8 *p)
808{
809 struct se_device *dev = cmd->se_dev;
810 struct se_session *sess = cmd->se_sess;
811
812 p[0] = 0x0a;
813 p[1] = 0x0a;
814
815 /* No changeable values for now */
816 if (pc == 1)
817 goto out;
818
819 /* GLTSD: No implicit save of log parameters */
820 p[2] = (1 << 1);
821 if (target_sense_desc_format(dev))
822 /* D_SENSE: Descriptor format sense data for 64bit sectors */
823 p[2] |= (1 << 2);
824
825 /*
826 * From spc4r23, 7.4.7 Control mode page
827 *
828 * The QUEUE ALGORITHM MODIFIER field (see table 368) specifies
829 * restrictions on the algorithm used for reordering commands
830 * having the SIMPLE task attribute (see SAM-4).
831 *
832 * Table 368 -- QUEUE ALGORITHM MODIFIER field
833 * Code Description
834 * 0h Restricted reordering
835 * 1h Unrestricted reordering allowed
836 * 2h to 7h Reserved
837 * 8h to Fh Vendor specific
838 *
839 * A value of zero in the QUEUE ALGORITHM MODIFIER field specifies that
840 * the device server shall order the processing sequence of commands
841 * having the SIMPLE task attribute such that data integrity is maintained
842 * for that I_T nexus (i.e., if the transmission of new SCSI transport protocol
843 * requests is halted at any time, the final value of all data observable
844 * on the medium shall be the same as if all the commands had been processed
845 * with the ORDERED task attribute).
846 *
847 * A value of one in the QUEUE ALGORITHM MODIFIER field specifies that the
848 * device server may reorder the processing sequence of commands having the
849 * SIMPLE task attribute in any manner. Any data integrity exposures related to
850 * command sequence order shall be explicitly handled by the application client
851 * through the selection of appropriate ommands and task attributes.
852 */
853 p[3] = (dev->dev_attrib.emulate_rest_reord == 1) ? 0x00 : 0x10;
854 /*
855 * From spc4r17, section 7.4.6 Control mode Page
856 *
857 * Unit Attention interlocks control (UN_INTLCK_CTRL) to code 00b
858 *
859 * 00b: The logical unit shall clear any unit attention condition
860 * reported in the same I_T_L_Q nexus transaction as a CHECK CONDITION
861 * status and shall not establish a unit attention condition when a com-
862 * mand is completed with BUSY, TASK SET FULL, or RESERVATION CONFLICT
863 * status.
864 *
865 * 10b: The logical unit shall not clear any unit attention condition
866 * reported in the same I_T_L_Q nexus transaction as a CHECK CONDITION
867 * status and shall not establish a unit attention condition when
868 * a command is completed with BUSY, TASK SET FULL, or RESERVATION
869 * CONFLICT status.
870 *
871 * 11b a The logical unit shall not clear any unit attention condition
872 * reported in the same I_T_L_Q nexus transaction as a CHECK CONDITION
873 * status and shall establish a unit attention condition for the
874 * initiator port associated with the I_T nexus on which the BUSY,
875 * TASK SET FULL, or RESERVATION CONFLICT status is being returned.
876 * Depending on the status, the additional sense code shall be set to
877 * PREVIOUS BUSY STATUS, PREVIOUS TASK SET FULL STATUS, or PREVIOUS
878 * RESERVATION CONFLICT STATUS. Until it is cleared by a REQUEST SENSE
879 * command, a unit attention condition shall be established only once
880 * for a BUSY, TASK SET FULL, or RESERVATION CONFLICT status regardless
881 * to the number of commands completed with one of those status codes.
882 */
883 switch (dev->dev_attrib.emulate_ua_intlck_ctrl) {
884 case TARGET_UA_INTLCK_CTRL_ESTABLISH_UA:
885 p[4] = 0x30;
886 break;
887 case TARGET_UA_INTLCK_CTRL_NO_CLEAR:
888 p[4] = 0x20;
889 break;
890 default: /* TARGET_UA_INTLCK_CTRL_CLEAR */
891 p[4] = 0x00;
892 break;
893 }
894 /*
895 * From spc4r17, section 7.4.6 Control mode Page
896 *
897 * Task Aborted Status (TAS) bit set to zero.
898 *
899 * A task aborted status (TAS) bit set to zero specifies that aborted
900 * tasks shall be terminated by the device server without any response
901 * to the application client. A TAS bit set to one specifies that tasks
902 * aborted by the actions of an I_T nexus other than the I_T nexus on
903 * which the command was received shall be completed with TASK ABORTED
904 * status (see SAM-4).
905 */
906 p[5] = (dev->dev_attrib.emulate_tas) ? 0x40 : 0x00;
907 /*
908 * From spc4r30, section 7.5.7 Control mode page
909 *
910 * Application Tag Owner (ATO) bit set to one.
911 *
912 * If the ATO bit is set to one the device server shall not modify the
913 * LOGICAL BLOCK APPLICATION TAG field and, depending on the protection
914 * type, shall not modify the contents of the LOGICAL BLOCK REFERENCE
915 * TAG field.
916 */
917 if (sess->sup_prot_ops & (TARGET_PROT_DIN_PASS | TARGET_PROT_DOUT_PASS)) {
918 if (dev->dev_attrib.pi_prot_type || sess->sess_prot_type)
919 p[5] |= 0x80;
920 }
921
922 p[8] = 0xff;
923 p[9] = 0xff;
924 p[11] = 30;
925
926out:
927 return 12;
928}
929
930static int spc_modesense_caching(struct se_cmd *cmd, u8 pc, u8 *p)
931{
932 struct se_device *dev = cmd->se_dev;
933
934 p[0] = 0x08;
935 p[1] = 0x12;
936
937 /* No changeable values for now */
938 if (pc == 1)
939 goto out;
940
941 if (target_check_wce(dev))
942 p[2] = 0x04; /* Write Cache Enable */
943 p[12] = 0x20; /* Disabled Read Ahead */
944
945out:
946 return 20;
947}
948
949static int spc_modesense_informational_exceptions(struct se_cmd *cmd, u8 pc, unsigned char *p)
950{
951 p[0] = 0x1c;
952 p[1] = 0x0a;
953
954 /* No changeable values for now */
955 if (pc == 1)
956 goto out;
957
958out:
959 return 12;
960}
961
962static struct {
963 uint8_t page;
964 uint8_t subpage;
965 int (*emulate)(struct se_cmd *, u8, unsigned char *);
966} modesense_handlers[] = {
967 { .page = 0x01, .subpage = 0x00, .emulate = spc_modesense_rwrecovery },
968 { .page = 0x08, .subpage = 0x00, .emulate = spc_modesense_caching },
969 { .page = 0x0a, .subpage = 0x00, .emulate = spc_modesense_control },
970 { .page = 0x1c, .subpage = 0x00, .emulate = spc_modesense_informational_exceptions },
971};
972
973static void spc_modesense_write_protect(unsigned char *buf, int type)
974{
975 /*
976 * I believe that the WP bit (bit 7) in the mode header is the same for
977 * all device types..
978 */
979 switch (type) {
980 case TYPE_DISK:
981 case TYPE_TAPE:
982 default:
983 buf[0] |= 0x80; /* WP bit */
984 break;
985 }
986}
987
988static void spc_modesense_dpofua(unsigned char *buf, int type)
989{
990 switch (type) {
991 case TYPE_DISK:
992 buf[0] |= 0x10; /* DPOFUA bit */
993 break;
994 default:
995 break;
996 }
997}
998
999static int spc_modesense_blockdesc(unsigned char *buf, u64 blocks, u32 block_size)
1000{
1001 *buf++ = 8;
1002 put_unaligned_be32(min(blocks, 0xffffffffull), buf);
1003 buf += 4;
1004 put_unaligned_be32(block_size, buf);
1005 return 9;
1006}
1007
1008static int spc_modesense_long_blockdesc(unsigned char *buf, u64 blocks, u32 block_size)
1009{
1010 if (blocks <= 0xffffffff)
1011 return spc_modesense_blockdesc(buf + 3, blocks, block_size) + 3;
1012
1013 *buf++ = 1; /* LONGLBA */
1014 buf += 2;
1015 *buf++ = 16;
1016 put_unaligned_be64(blocks, buf);
1017 buf += 12;
1018 put_unaligned_be32(block_size, buf);
1019
1020 return 17;
1021}
1022
1023static sense_reason_t spc_emulate_modesense(struct se_cmd *cmd)
1024{
1025 struct se_device *dev = cmd->se_dev;
1026 char *cdb = cmd->t_task_cdb;
1027 unsigned char buf[SE_MODE_PAGE_BUF], *rbuf;
1028 int type = dev->transport->get_device_type(dev);
1029 int ten = (cmd->t_task_cdb[0] == MODE_SENSE_10);
1030 bool dbd = !!(cdb[1] & 0x08);
1031 bool llba = ten ? !!(cdb[1] & 0x10) : false;
1032 u8 pc = cdb[2] >> 6;
1033 u8 page = cdb[2] & 0x3f;
1034 u8 subpage = cdb[3];
1035 int length = 0;
1036 int ret;
1037 int i;
1038
1039 memset(buf, 0, SE_MODE_PAGE_BUF);
1040
1041 /*
1042 * Skip over MODE DATA LENGTH + MEDIUM TYPE fields to byte 3 for
1043 * MODE_SENSE_10 and byte 2 for MODE_SENSE (6).
1044 */
1045 length = ten ? 3 : 2;
1046
1047 /* DEVICE-SPECIFIC PARAMETER */
1048 if (cmd->se_lun->lun_access_ro || target_lun_is_rdonly(cmd))
1049 spc_modesense_write_protect(&buf[length], type);
1050
1051 /*
1052 * SBC only allows us to enable FUA and DPO together. Fortunately
1053 * DPO is explicitly specified as a hint, so a noop is a perfectly
1054 * valid implementation.
1055 */
1056 if (target_check_fua(dev))
1057 spc_modesense_dpofua(&buf[length], type);
1058
1059 ++length;
1060
1061 /* BLOCK DESCRIPTOR */
1062
1063 /*
1064 * For now we only include a block descriptor for disk (SBC)
1065 * devices; other command sets use a slightly different format.
1066 */
1067 if (!dbd && type == TYPE_DISK) {
1068 u64 blocks = dev->transport->get_blocks(dev);
1069 u32 block_size = dev->dev_attrib.block_size;
1070
1071 if (ten) {
1072 if (llba) {
1073 length += spc_modesense_long_blockdesc(&buf[length],
1074 blocks, block_size);
1075 } else {
1076 length += 3;
1077 length += spc_modesense_blockdesc(&buf[length],
1078 blocks, block_size);
1079 }
1080 } else {
1081 length += spc_modesense_blockdesc(&buf[length], blocks,
1082 block_size);
1083 }
1084 } else {
1085 if (ten)
1086 length += 4;
1087 else
1088 length += 1;
1089 }
1090
1091 if (page == 0x3f) {
1092 if (subpage != 0x00 && subpage != 0xff) {
1093 pr_warn("MODE_SENSE: Invalid subpage code: 0x%02x\n", subpage);
1094 return TCM_INVALID_CDB_FIELD;
1095 }
1096
1097 for (i = 0; i < ARRAY_SIZE(modesense_handlers); ++i) {
1098 /*
1099 * Tricky way to say all subpage 00h for
1100 * subpage==0, all subpages for subpage==0xff
1101 * (and we just checked above that those are
1102 * the only two possibilities).
1103 */
1104 if ((modesense_handlers[i].subpage & ~subpage) == 0) {
1105 ret = modesense_handlers[i].emulate(cmd, pc, &buf[length]);
1106 if (!ten && length + ret >= 255)
1107 break;
1108 length += ret;
1109 }
1110 }
1111
1112 goto set_length;
1113 }
1114
1115 for (i = 0; i < ARRAY_SIZE(modesense_handlers); ++i)
1116 if (modesense_handlers[i].page == page &&
1117 modesense_handlers[i].subpage == subpage) {
1118 length += modesense_handlers[i].emulate(cmd, pc, &buf[length]);
1119 goto set_length;
1120 }
1121
1122 /*
1123 * We don't intend to implement:
1124 * - obsolete page 03h "format parameters" (checked by Solaris)
1125 */
1126 if (page != 0x03)
1127 pr_err("MODE SENSE: unimplemented page/subpage: 0x%02x/0x%02x\n",
1128 page, subpage);
1129
1130 return TCM_UNKNOWN_MODE_PAGE;
1131
1132set_length:
1133 if (ten)
1134 put_unaligned_be16(length - 2, buf);
1135 else
1136 buf[0] = length - 1;
1137
1138 rbuf = transport_kmap_data_sg(cmd);
1139 if (rbuf) {
1140 memcpy(rbuf, buf, min_t(u32, SE_MODE_PAGE_BUF, cmd->data_length));
1141 transport_kunmap_data_sg(cmd);
1142 }
1143
1144 target_complete_cmd_with_length(cmd, SAM_STAT_GOOD, length);
1145 return 0;
1146}
1147
1148static sense_reason_t spc_emulate_modeselect(struct se_cmd *cmd)
1149{
1150 char *cdb = cmd->t_task_cdb;
1151 bool ten = cdb[0] == MODE_SELECT_10;
1152 int off = ten ? 8 : 4;
1153 bool pf = !!(cdb[1] & 0x10);
1154 u8 page, subpage;
1155 unsigned char *buf;
1156 unsigned char tbuf[SE_MODE_PAGE_BUF];
1157 int length;
1158 sense_reason_t ret = 0;
1159 int i;
1160
1161 if (!cmd->data_length) {
1162 target_complete_cmd(cmd, SAM_STAT_GOOD);
1163 return 0;
1164 }
1165
1166 if (cmd->data_length < off + 2)
1167 return TCM_PARAMETER_LIST_LENGTH_ERROR;
1168
1169 buf = transport_kmap_data_sg(cmd);
1170 if (!buf)
1171 return TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE;
1172
1173 if (!pf) {
1174 ret = TCM_INVALID_CDB_FIELD;
1175 goto out;
1176 }
1177
1178 page = buf[off] & 0x3f;
1179 subpage = buf[off] & 0x40 ? buf[off + 1] : 0;
1180
1181 for (i = 0; i < ARRAY_SIZE(modesense_handlers); ++i)
1182 if (modesense_handlers[i].page == page &&
1183 modesense_handlers[i].subpage == subpage) {
1184 memset(tbuf, 0, SE_MODE_PAGE_BUF);
1185 length = modesense_handlers[i].emulate(cmd, 0, tbuf);
1186 goto check_contents;
1187 }
1188
1189 ret = TCM_UNKNOWN_MODE_PAGE;
1190 goto out;
1191
1192check_contents:
1193 if (cmd->data_length < off + length) {
1194 ret = TCM_PARAMETER_LIST_LENGTH_ERROR;
1195 goto out;
1196 }
1197
1198 if (memcmp(buf + off, tbuf, length))
1199 ret = TCM_INVALID_PARAMETER_LIST;
1200
1201out:
1202 transport_kunmap_data_sg(cmd);
1203
1204 if (!ret)
1205 target_complete_cmd(cmd, SAM_STAT_GOOD);
1206 return ret;
1207}
1208
1209static sense_reason_t spc_emulate_request_sense(struct se_cmd *cmd)
1210{
1211 unsigned char *cdb = cmd->t_task_cdb;
1212 unsigned char *rbuf;
1213 u8 ua_asc = 0, ua_ascq = 0;
1214 unsigned char buf[SE_SENSE_BUF];
1215 bool desc_format = target_sense_desc_format(cmd->se_dev);
1216
1217 memset(buf, 0, SE_SENSE_BUF);
1218
1219 if (cdb[1] & 0x01) {
1220 pr_err("REQUEST_SENSE description emulation not"
1221 " supported\n");
1222 return TCM_INVALID_CDB_FIELD;
1223 }
1224
1225 rbuf = transport_kmap_data_sg(cmd);
1226 if (!rbuf)
1227 return TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE;
1228
1229 if (!core_scsi3_ua_clear_for_request_sense(cmd, &ua_asc, &ua_ascq))
1230 scsi_build_sense_buffer(desc_format, buf, UNIT_ATTENTION,
1231 ua_asc, ua_ascq);
1232 else
1233 scsi_build_sense_buffer(desc_format, buf, NO_SENSE, 0x0, 0x0);
1234
1235 memcpy(rbuf, buf, min_t(u32, sizeof(buf), cmd->data_length));
1236 transport_kunmap_data_sg(cmd);
1237
1238 target_complete_cmd(cmd, SAM_STAT_GOOD);
1239 return 0;
1240}
1241
1242sense_reason_t spc_emulate_report_luns(struct se_cmd *cmd)
1243{
1244 struct se_dev_entry *deve;
1245 struct se_session *sess = cmd->se_sess;
1246 struct se_node_acl *nacl;
1247 struct scsi_lun slun;
1248 unsigned char *buf;
1249 u32 lun_count = 0, offset = 8;
1250 __be32 len;
1251
1252 buf = transport_kmap_data_sg(cmd);
1253 if (cmd->data_length && !buf)
1254 return TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE;
1255
1256 /*
1257 * If no struct se_session pointer is present, this struct se_cmd is
1258 * coming via a target_core_mod PASSTHROUGH op, and not through
1259 * a $FABRIC_MOD. In that case, report LUN=0 only.
1260 */
1261 if (!sess)
1262 goto done;
1263
1264 nacl = sess->se_node_acl;
1265
1266 rcu_read_lock();
1267 hlist_for_each_entry_rcu(deve, &nacl->lun_entry_hlist, link) {
1268 /*
1269 * We determine the correct LUN LIST LENGTH even once we
1270 * have reached the initial allocation length.
1271 * See SPC2-R20 7.19.
1272 */
1273 lun_count++;
1274 if (offset >= cmd->data_length)
1275 continue;
1276
1277 int_to_scsilun(deve->mapped_lun, &slun);
1278 memcpy(buf + offset, &slun,
1279 min(8u, cmd->data_length - offset));
1280 offset += 8;
1281 }
1282 rcu_read_unlock();
1283
1284 /*
1285 * See SPC3 r07, page 159.
1286 */
1287done:
1288 /*
1289 * If no LUNs are accessible, report virtual LUN 0.
1290 */
1291 if (lun_count == 0) {
1292 int_to_scsilun(0, &slun);
1293 if (cmd->data_length > 8)
1294 memcpy(buf + offset, &slun,
1295 min(8u, cmd->data_length - offset));
1296 lun_count = 1;
1297 }
1298
1299 if (buf) {
1300 len = cpu_to_be32(lun_count * 8);
1301 memcpy(buf, &len, min_t(int, sizeof len, cmd->data_length));
1302 transport_kunmap_data_sg(cmd);
1303 }
1304
1305 target_complete_cmd_with_length(cmd, SAM_STAT_GOOD, 8 + lun_count * 8);
1306 return 0;
1307}
1308EXPORT_SYMBOL(spc_emulate_report_luns);
1309
1310static sense_reason_t
1311spc_emulate_testunitready(struct se_cmd *cmd)
1312{
1313 target_complete_cmd(cmd, SAM_STAT_GOOD);
1314 return 0;
1315}
1316
1317static void set_dpofua_usage_bits(u8 *usage_bits, struct se_device *dev)
1318{
1319 if (!target_check_fua(dev))
1320 usage_bits[1] &= ~0x18;
1321 else
1322 usage_bits[1] |= 0x18;
1323}
1324
1325static void set_dpofua_usage_bits32(u8 *usage_bits, struct se_device *dev)
1326{
1327 if (!target_check_fua(dev))
1328 usage_bits[10] &= ~0x18;
1329 else
1330 usage_bits[10] |= 0x18;
1331}
1332
1333static struct target_opcode_descriptor tcm_opcode_read6 = {
1334 .support = SCSI_SUPPORT_FULL,
1335 .opcode = READ_6,
1336 .cdb_size = 6,
1337 .usage_bits = {READ_6, 0x1f, 0xff, 0xff,
1338 0xff, SCSI_CONTROL_MASK},
1339};
1340
1341static struct target_opcode_descriptor tcm_opcode_read10 = {
1342 .support = SCSI_SUPPORT_FULL,
1343 .opcode = READ_10,
1344 .cdb_size = 10,
1345 .usage_bits = {READ_10, 0xf8, 0xff, 0xff,
1346 0xff, 0xff, SCSI_GROUP_NUMBER_MASK, 0xff,
1347 0xff, SCSI_CONTROL_MASK},
1348 .update_usage_bits = set_dpofua_usage_bits,
1349};
1350
1351static struct target_opcode_descriptor tcm_opcode_read12 = {
1352 .support = SCSI_SUPPORT_FULL,
1353 .opcode = READ_12,
1354 .cdb_size = 12,
1355 .usage_bits = {READ_12, 0xf8, 0xff, 0xff,
1356 0xff, 0xff, 0xff, 0xff,
1357 0xff, 0xff, SCSI_GROUP_NUMBER_MASK, SCSI_CONTROL_MASK},
1358 .update_usage_bits = set_dpofua_usage_bits,
1359};
1360
1361static struct target_opcode_descriptor tcm_opcode_read16 = {
1362 .support = SCSI_SUPPORT_FULL,
1363 .opcode = READ_16,
1364 .cdb_size = 16,
1365 .usage_bits = {READ_16, 0xf8, 0xff, 0xff,
1366 0xff, 0xff, 0xff, 0xff,
1367 0xff, 0xff, 0xff, 0xff,
1368 0xff, 0xff, SCSI_GROUP_NUMBER_MASK, SCSI_CONTROL_MASK},
1369 .update_usage_bits = set_dpofua_usage_bits,
1370};
1371
1372static struct target_opcode_descriptor tcm_opcode_write6 = {
1373 .support = SCSI_SUPPORT_FULL,
1374 .opcode = WRITE_6,
1375 .cdb_size = 6,
1376 .usage_bits = {WRITE_6, 0x1f, 0xff, 0xff,
1377 0xff, SCSI_CONTROL_MASK},
1378};
1379
1380static struct target_opcode_descriptor tcm_opcode_write10 = {
1381 .support = SCSI_SUPPORT_FULL,
1382 .opcode = WRITE_10,
1383 .cdb_size = 10,
1384 .usage_bits = {WRITE_10, 0xf8, 0xff, 0xff,
1385 0xff, 0xff, SCSI_GROUP_NUMBER_MASK, 0xff,
1386 0xff, SCSI_CONTROL_MASK},
1387 .update_usage_bits = set_dpofua_usage_bits,
1388};
1389
1390static struct target_opcode_descriptor tcm_opcode_write_verify10 = {
1391 .support = SCSI_SUPPORT_FULL,
1392 .opcode = WRITE_VERIFY,
1393 .cdb_size = 10,
1394 .usage_bits = {WRITE_VERIFY, 0xf0, 0xff, 0xff,
1395 0xff, 0xff, SCSI_GROUP_NUMBER_MASK, 0xff,
1396 0xff, SCSI_CONTROL_MASK},
1397 .update_usage_bits = set_dpofua_usage_bits,
1398};
1399
1400static struct target_opcode_descriptor tcm_opcode_write12 = {
1401 .support = SCSI_SUPPORT_FULL,
1402 .opcode = WRITE_12,
1403 .cdb_size = 12,
1404 .usage_bits = {WRITE_12, 0xf8, 0xff, 0xff,
1405 0xff, 0xff, 0xff, 0xff,
1406 0xff, 0xff, SCSI_GROUP_NUMBER_MASK, SCSI_CONTROL_MASK},
1407 .update_usage_bits = set_dpofua_usage_bits,
1408};
1409
1410static struct target_opcode_descriptor tcm_opcode_write16 = {
1411 .support = SCSI_SUPPORT_FULL,
1412 .opcode = WRITE_16,
1413 .cdb_size = 16,
1414 .usage_bits = {WRITE_16, 0xf8, 0xff, 0xff,
1415 0xff, 0xff, 0xff, 0xff,
1416 0xff, 0xff, 0xff, 0xff,
1417 0xff, 0xff, SCSI_GROUP_NUMBER_MASK, SCSI_CONTROL_MASK},
1418 .update_usage_bits = set_dpofua_usage_bits,
1419};
1420
1421static struct target_opcode_descriptor tcm_opcode_write_verify16 = {
1422 .support = SCSI_SUPPORT_FULL,
1423 .opcode = WRITE_VERIFY_16,
1424 .cdb_size = 16,
1425 .usage_bits = {WRITE_VERIFY_16, 0xf0, 0xff, 0xff,
1426 0xff, 0xff, 0xff, 0xff,
1427 0xff, 0xff, 0xff, 0xff,
1428 0xff, 0xff, SCSI_GROUP_NUMBER_MASK, SCSI_CONTROL_MASK},
1429 .update_usage_bits = set_dpofua_usage_bits,
1430};
1431
1432static bool tcm_is_ws_enabled(struct se_cmd *cmd)
1433{
1434 struct sbc_ops *ops = cmd->protocol_data;
1435 struct se_device *dev = cmd->se_dev;
1436
1437 return (dev->dev_attrib.emulate_tpws && !!ops->execute_unmap) ||
1438 !!ops->execute_write_same;
1439}
1440
1441static struct target_opcode_descriptor tcm_opcode_write_same32 = {
1442 .support = SCSI_SUPPORT_FULL,
1443 .serv_action_valid = 1,
1444 .opcode = VARIABLE_LENGTH_CMD,
1445 .service_action = WRITE_SAME_32,
1446 .cdb_size = 32,
1447 .usage_bits = {VARIABLE_LENGTH_CMD, SCSI_CONTROL_MASK, 0x00, 0x00,
1448 0x00, 0x00, SCSI_GROUP_NUMBER_MASK, 0x18,
1449 0x00, WRITE_SAME_32, 0xe8, 0x00,
1450 0xff, 0xff, 0xff, 0xff,
1451 0xff, 0xff, 0xff, 0xff,
1452 0x00, 0x00, 0x00, 0x00,
1453 0x00, 0x00, 0x00, 0x00,
1454 0xff, 0xff, 0xff, 0xff},
1455 .enabled = tcm_is_ws_enabled,
1456 .update_usage_bits = set_dpofua_usage_bits32,
1457};
1458
1459static bool tcm_is_caw_enabled(struct se_cmd *cmd)
1460{
1461 struct se_device *dev = cmd->se_dev;
1462
1463 return dev->dev_attrib.emulate_caw;
1464}
1465
1466static struct target_opcode_descriptor tcm_opcode_compare_write = {
1467 .support = SCSI_SUPPORT_FULL,
1468 .opcode = COMPARE_AND_WRITE,
1469 .cdb_size = 16,
1470 .usage_bits = {COMPARE_AND_WRITE, 0x18, 0xff, 0xff,
1471 0xff, 0xff, 0xff, 0xff,
1472 0xff, 0xff, 0x00, 0x00,
1473 0x00, 0xff, SCSI_GROUP_NUMBER_MASK, SCSI_CONTROL_MASK},
1474 .enabled = tcm_is_caw_enabled,
1475 .update_usage_bits = set_dpofua_usage_bits,
1476};
1477
1478static struct target_opcode_descriptor tcm_opcode_read_capacity = {
1479 .support = SCSI_SUPPORT_FULL,
1480 .opcode = READ_CAPACITY,
1481 .cdb_size = 10,
1482 .usage_bits = {READ_CAPACITY, 0x00, 0xff, 0xff,
1483 0xff, 0xff, 0x00, 0x00,
1484 0x01, SCSI_CONTROL_MASK},
1485};
1486
1487static struct target_opcode_descriptor tcm_opcode_read_capacity16 = {
1488 .support = SCSI_SUPPORT_FULL,
1489 .serv_action_valid = 1,
1490 .opcode = SERVICE_ACTION_IN_16,
1491 .service_action = SAI_READ_CAPACITY_16,
1492 .cdb_size = 16,
1493 .usage_bits = {SERVICE_ACTION_IN_16, SAI_READ_CAPACITY_16, 0x00, 0x00,
1494 0x00, 0x00, 0x00, 0x00,
1495 0x00, 0x00, 0xff, 0xff,
1496 0xff, 0xff, 0x00, SCSI_CONTROL_MASK},
1497};
1498
1499static bool tcm_is_rep_ref_enabled(struct se_cmd *cmd)
1500{
1501 struct se_device *dev = cmd->se_dev;
1502
1503 spin_lock(&dev->t10_alua.lba_map_lock);
1504 if (list_empty(&dev->t10_alua.lba_map_list)) {
1505 spin_unlock(&dev->t10_alua.lba_map_lock);
1506 return false;
1507 }
1508 spin_unlock(&dev->t10_alua.lba_map_lock);
1509 return true;
1510
1511}
1512
1513static struct target_opcode_descriptor tcm_opcode_read_report_refferals = {
1514 .support = SCSI_SUPPORT_FULL,
1515 .serv_action_valid = 1,
1516 .opcode = SERVICE_ACTION_IN_16,
1517 .service_action = SAI_REPORT_REFERRALS,
1518 .cdb_size = 16,
1519 .usage_bits = {SERVICE_ACTION_IN_16, SAI_REPORT_REFERRALS, 0x00, 0x00,
1520 0x00, 0x00, 0x00, 0x00,
1521 0x00, 0x00, 0xff, 0xff,
1522 0xff, 0xff, 0x00, SCSI_CONTROL_MASK},
1523 .enabled = tcm_is_rep_ref_enabled,
1524};
1525
1526static struct target_opcode_descriptor tcm_opcode_sync_cache = {
1527 .support = SCSI_SUPPORT_FULL,
1528 .opcode = SYNCHRONIZE_CACHE,
1529 .cdb_size = 10,
1530 .usage_bits = {SYNCHRONIZE_CACHE, 0x02, 0xff, 0xff,
1531 0xff, 0xff, SCSI_GROUP_NUMBER_MASK, 0xff,
1532 0xff, SCSI_CONTROL_MASK},
1533};
1534
1535static struct target_opcode_descriptor tcm_opcode_sync_cache16 = {
1536 .support = SCSI_SUPPORT_FULL,
1537 .opcode = SYNCHRONIZE_CACHE_16,
1538 .cdb_size = 16,
1539 .usage_bits = {SYNCHRONIZE_CACHE_16, 0x02, 0xff, 0xff,
1540 0xff, 0xff, 0xff, 0xff,
1541 0xff, 0xff, 0xff, 0xff,
1542 0xff, 0xff, SCSI_GROUP_NUMBER_MASK, SCSI_CONTROL_MASK},
1543};
1544
1545static bool tcm_is_unmap_enabled(struct se_cmd *cmd)
1546{
1547 struct sbc_ops *ops = cmd->protocol_data;
1548 struct se_device *dev = cmd->se_dev;
1549
1550 return ops->execute_unmap && dev->dev_attrib.emulate_tpu;
1551}
1552
1553static struct target_opcode_descriptor tcm_opcode_unmap = {
1554 .support = SCSI_SUPPORT_FULL,
1555 .opcode = UNMAP,
1556 .cdb_size = 10,
1557 .usage_bits = {UNMAP, 0x00, 0x00, 0x00,
1558 0x00, 0x00, SCSI_GROUP_NUMBER_MASK, 0xff,
1559 0xff, SCSI_CONTROL_MASK},
1560 .enabled = tcm_is_unmap_enabled,
1561};
1562
1563static struct target_opcode_descriptor tcm_opcode_write_same = {
1564 .support = SCSI_SUPPORT_FULL,
1565 .opcode = WRITE_SAME,
1566 .cdb_size = 10,
1567 .usage_bits = {WRITE_SAME, 0xe8, 0xff, 0xff,
1568 0xff, 0xff, SCSI_GROUP_NUMBER_MASK, 0xff,
1569 0xff, SCSI_CONTROL_MASK},
1570 .enabled = tcm_is_ws_enabled,
1571};
1572
1573static struct target_opcode_descriptor tcm_opcode_write_same16 = {
1574 .support = SCSI_SUPPORT_FULL,
1575 .opcode = WRITE_SAME_16,
1576 .cdb_size = 16,
1577 .usage_bits = {WRITE_SAME_16, 0xe8, 0xff, 0xff,
1578 0xff, 0xff, 0xff, 0xff,
1579 0xff, 0xff, 0xff, 0xff,
1580 0xff, 0xff, SCSI_GROUP_NUMBER_MASK, SCSI_CONTROL_MASK},
1581 .enabled = tcm_is_ws_enabled,
1582};
1583
1584static struct target_opcode_descriptor tcm_opcode_verify = {
1585 .support = SCSI_SUPPORT_FULL,
1586 .opcode = VERIFY,
1587 .cdb_size = 10,
1588 .usage_bits = {VERIFY, 0x00, 0xff, 0xff,
1589 0xff, 0xff, SCSI_GROUP_NUMBER_MASK, 0xff,
1590 0xff, SCSI_CONTROL_MASK},
1591};
1592
1593static struct target_opcode_descriptor tcm_opcode_verify16 = {
1594 .support = SCSI_SUPPORT_FULL,
1595 .opcode = VERIFY_16,
1596 .cdb_size = 16,
1597 .usage_bits = {VERIFY_16, 0x00, 0xff, 0xff,
1598 0xff, 0xff, 0xff, 0xff,
1599 0xff, 0xff, 0xff, 0xff,
1600 0xff, 0xff, SCSI_GROUP_NUMBER_MASK, SCSI_CONTROL_MASK},
1601};
1602
1603static struct target_opcode_descriptor tcm_opcode_start_stop = {
1604 .support = SCSI_SUPPORT_FULL,
1605 .opcode = START_STOP,
1606 .cdb_size = 6,
1607 .usage_bits = {START_STOP, 0x01, 0x00, 0x00,
1608 0x01, SCSI_CONTROL_MASK},
1609};
1610
1611static struct target_opcode_descriptor tcm_opcode_mode_select = {
1612 .support = SCSI_SUPPORT_FULL,
1613 .opcode = MODE_SELECT,
1614 .cdb_size = 6,
1615 .usage_bits = {MODE_SELECT, 0x10, 0x00, 0x00,
1616 0xff, SCSI_CONTROL_MASK},
1617};
1618
1619static struct target_opcode_descriptor tcm_opcode_mode_select10 = {
1620 .support = SCSI_SUPPORT_FULL,
1621 .opcode = MODE_SELECT_10,
1622 .cdb_size = 10,
1623 .usage_bits = {MODE_SELECT_10, 0x10, 0x00, 0x00,
1624 0x00, 0x00, 0x00, 0xff,
1625 0xff, SCSI_CONTROL_MASK},
1626};
1627
1628static struct target_opcode_descriptor tcm_opcode_mode_sense = {
1629 .support = SCSI_SUPPORT_FULL,
1630 .opcode = MODE_SENSE,
1631 .cdb_size = 6,
1632 .usage_bits = {MODE_SENSE, 0x08, 0xff, 0xff,
1633 0xff, SCSI_CONTROL_MASK},
1634};
1635
1636static struct target_opcode_descriptor tcm_opcode_mode_sense10 = {
1637 .support = SCSI_SUPPORT_FULL,
1638 .opcode = MODE_SENSE_10,
1639 .cdb_size = 10,
1640 .usage_bits = {MODE_SENSE_10, 0x18, 0xff, 0xff,
1641 0x00, 0x00, 0x00, 0xff,
1642 0xff, SCSI_CONTROL_MASK},
1643};
1644
1645static struct target_opcode_descriptor tcm_opcode_pri_read_keys = {
1646 .support = SCSI_SUPPORT_FULL,
1647 .serv_action_valid = 1,
1648 .opcode = PERSISTENT_RESERVE_IN,
1649 .service_action = PRI_READ_KEYS,
1650 .cdb_size = 10,
1651 .usage_bits = {PERSISTENT_RESERVE_IN, PRI_READ_KEYS, 0x00, 0x00,
1652 0x00, 0x00, 0x00, 0xff,
1653 0xff, SCSI_CONTROL_MASK},
1654};
1655
1656static struct target_opcode_descriptor tcm_opcode_pri_read_resrv = {
1657 .support = SCSI_SUPPORT_FULL,
1658 .serv_action_valid = 1,
1659 .opcode = PERSISTENT_RESERVE_IN,
1660 .service_action = PRI_READ_RESERVATION,
1661 .cdb_size = 10,
1662 .usage_bits = {PERSISTENT_RESERVE_IN, PRI_READ_RESERVATION, 0x00, 0x00,
1663 0x00, 0x00, 0x00, 0xff,
1664 0xff, SCSI_CONTROL_MASK},
1665};
1666
1667static bool tcm_is_pr_enabled(struct se_cmd *cmd)
1668{
1669 struct se_device *dev = cmd->se_dev;
1670
1671 return dev->dev_attrib.emulate_pr;
1672}
1673
1674static struct target_opcode_descriptor tcm_opcode_pri_read_caps = {
1675 .support = SCSI_SUPPORT_FULL,
1676 .serv_action_valid = 1,
1677 .opcode = PERSISTENT_RESERVE_IN,
1678 .service_action = PRI_REPORT_CAPABILITIES,
1679 .cdb_size = 10,
1680 .usage_bits = {PERSISTENT_RESERVE_IN, PRI_REPORT_CAPABILITIES, 0x00, 0x00,
1681 0x00, 0x00, 0x00, 0xff,
1682 0xff, SCSI_CONTROL_MASK},
1683 .enabled = tcm_is_pr_enabled,
1684};
1685
1686static struct target_opcode_descriptor tcm_opcode_pri_read_full_status = {
1687 .support = SCSI_SUPPORT_FULL,
1688 .serv_action_valid = 1,
1689 .opcode = PERSISTENT_RESERVE_IN,
1690 .service_action = PRI_READ_FULL_STATUS,
1691 .cdb_size = 10,
1692 .usage_bits = {PERSISTENT_RESERVE_IN, PRI_READ_FULL_STATUS, 0x00, 0x00,
1693 0x00, 0x00, 0x00, 0xff,
1694 0xff, SCSI_CONTROL_MASK},
1695 .enabled = tcm_is_pr_enabled,
1696};
1697
1698static struct target_opcode_descriptor tcm_opcode_pro_register = {
1699 .support = SCSI_SUPPORT_FULL,
1700 .serv_action_valid = 1,
1701 .opcode = PERSISTENT_RESERVE_OUT,
1702 .service_action = PRO_REGISTER,
1703 .cdb_size = 10,
1704 .usage_bits = {PERSISTENT_RESERVE_OUT, PRO_REGISTER, 0xff, 0x00,
1705 0x00, 0xff, 0xff, 0xff,
1706 0xff, SCSI_CONTROL_MASK},
1707 .enabled = tcm_is_pr_enabled,
1708};
1709
1710static struct target_opcode_descriptor tcm_opcode_pro_reserve = {
1711 .support = SCSI_SUPPORT_FULL,
1712 .serv_action_valid = 1,
1713 .opcode = PERSISTENT_RESERVE_OUT,
1714 .service_action = PRO_RESERVE,
1715 .cdb_size = 10,
1716 .usage_bits = {PERSISTENT_RESERVE_OUT, PRO_RESERVE, 0xff, 0x00,
1717 0x00, 0xff, 0xff, 0xff,
1718 0xff, SCSI_CONTROL_MASK},
1719 .enabled = tcm_is_pr_enabled,
1720};
1721
1722static struct target_opcode_descriptor tcm_opcode_pro_release = {
1723 .support = SCSI_SUPPORT_FULL,
1724 .serv_action_valid = 1,
1725 .opcode = PERSISTENT_RESERVE_OUT,
1726 .service_action = PRO_RELEASE,
1727 .cdb_size = 10,
1728 .usage_bits = {PERSISTENT_RESERVE_OUT, PRO_RELEASE, 0xff, 0x00,
1729 0x00, 0xff, 0xff, 0xff,
1730 0xff, SCSI_CONTROL_MASK},
1731 .enabled = tcm_is_pr_enabled,
1732};
1733
1734static struct target_opcode_descriptor tcm_opcode_pro_clear = {
1735 .support = SCSI_SUPPORT_FULL,
1736 .serv_action_valid = 1,
1737 .opcode = PERSISTENT_RESERVE_OUT,
1738 .service_action = PRO_CLEAR,
1739 .cdb_size = 10,
1740 .usage_bits = {PERSISTENT_RESERVE_OUT, PRO_CLEAR, 0xff, 0x00,
1741 0x00, 0xff, 0xff, 0xff,
1742 0xff, SCSI_CONTROL_MASK},
1743 .enabled = tcm_is_pr_enabled,
1744};
1745
1746static struct target_opcode_descriptor tcm_opcode_pro_preempt = {
1747 .support = SCSI_SUPPORT_FULL,
1748 .serv_action_valid = 1,
1749 .opcode = PERSISTENT_RESERVE_OUT,
1750 .service_action = PRO_PREEMPT,
1751 .cdb_size = 10,
1752 .usage_bits = {PERSISTENT_RESERVE_OUT, PRO_PREEMPT, 0xff, 0x00,
1753 0x00, 0xff, 0xff, 0xff,
1754 0xff, SCSI_CONTROL_MASK},
1755 .enabled = tcm_is_pr_enabled,
1756};
1757
1758static struct target_opcode_descriptor tcm_opcode_pro_preempt_abort = {
1759 .support = SCSI_SUPPORT_FULL,
1760 .serv_action_valid = 1,
1761 .opcode = PERSISTENT_RESERVE_OUT,
1762 .service_action = PRO_PREEMPT_AND_ABORT,
1763 .cdb_size = 10,
1764 .usage_bits = {PERSISTENT_RESERVE_OUT, PRO_PREEMPT_AND_ABORT, 0xff, 0x00,
1765 0x00, 0xff, 0xff, 0xff,
1766 0xff, SCSI_CONTROL_MASK},
1767 .enabled = tcm_is_pr_enabled,
1768};
1769
1770static struct target_opcode_descriptor tcm_opcode_pro_reg_ign_exist = {
1771 .support = SCSI_SUPPORT_FULL,
1772 .serv_action_valid = 1,
1773 .opcode = PERSISTENT_RESERVE_OUT,
1774 .service_action = PRO_REGISTER_AND_IGNORE_EXISTING_KEY,
1775 .cdb_size = 10,
1776 .usage_bits = {
1777 PERSISTENT_RESERVE_OUT, PRO_REGISTER_AND_IGNORE_EXISTING_KEY,
1778 0xff, 0x00,
1779 0x00, 0xff, 0xff, 0xff,
1780 0xff, SCSI_CONTROL_MASK},
1781 .enabled = tcm_is_pr_enabled,
1782};
1783
1784static struct target_opcode_descriptor tcm_opcode_pro_register_move = {
1785 .support = SCSI_SUPPORT_FULL,
1786 .serv_action_valid = 1,
1787 .opcode = PERSISTENT_RESERVE_OUT,
1788 .service_action = PRO_REGISTER_AND_MOVE,
1789 .cdb_size = 10,
1790 .usage_bits = {PERSISTENT_RESERVE_OUT, PRO_REGISTER_AND_MOVE, 0xff, 0x00,
1791 0x00, 0xff, 0xff, 0xff,
1792 0xff, SCSI_CONTROL_MASK},
1793 .enabled = tcm_is_pr_enabled,
1794};
1795
1796static bool tcm_is_scsi2_reservations_enabled(struct se_cmd *cmd)
1797{
1798 struct se_device *dev = cmd->se_dev;
1799
1800 return dev->dev_attrib.emulate_pr;
1801}
1802
1803static struct target_opcode_descriptor tcm_opcode_release = {
1804 .support = SCSI_SUPPORT_FULL,
1805 .opcode = RELEASE,
1806 .cdb_size = 6,
1807 .usage_bits = {RELEASE, 0x00, 0x00, 0x00,
1808 0x00, SCSI_CONTROL_MASK},
1809 .enabled = tcm_is_scsi2_reservations_enabled,
1810};
1811
1812static struct target_opcode_descriptor tcm_opcode_release10 = {
1813 .support = SCSI_SUPPORT_FULL,
1814 .opcode = RELEASE_10,
1815 .cdb_size = 10,
1816 .usage_bits = {RELEASE_10, 0x00, 0x00, 0x00,
1817 0x00, 0x00, 0x00, 0xff,
1818 0xff, SCSI_CONTROL_MASK},
1819 .enabled = tcm_is_scsi2_reservations_enabled,
1820};
1821
1822static struct target_opcode_descriptor tcm_opcode_reserve = {
1823 .support = SCSI_SUPPORT_FULL,
1824 .opcode = RESERVE,
1825 .cdb_size = 6,
1826 .usage_bits = {RESERVE, 0x00, 0x00, 0x00,
1827 0x00, SCSI_CONTROL_MASK},
1828 .enabled = tcm_is_scsi2_reservations_enabled,
1829};
1830
1831static struct target_opcode_descriptor tcm_opcode_reserve10 = {
1832 .support = SCSI_SUPPORT_FULL,
1833 .opcode = RESERVE_10,
1834 .cdb_size = 10,
1835 .usage_bits = {RESERVE_10, 0x00, 0x00, 0x00,
1836 0x00, 0x00, 0x00, 0xff,
1837 0xff, SCSI_CONTROL_MASK},
1838 .enabled = tcm_is_scsi2_reservations_enabled,
1839};
1840
1841static struct target_opcode_descriptor tcm_opcode_request_sense = {
1842 .support = SCSI_SUPPORT_FULL,
1843 .opcode = REQUEST_SENSE,
1844 .cdb_size = 6,
1845 .usage_bits = {REQUEST_SENSE, 0x00, 0x00, 0x00,
1846 0xff, SCSI_CONTROL_MASK},
1847};
1848
1849static struct target_opcode_descriptor tcm_opcode_inquiry = {
1850 .support = SCSI_SUPPORT_FULL,
1851 .opcode = INQUIRY,
1852 .cdb_size = 6,
1853 .usage_bits = {INQUIRY, 0x01, 0xff, 0xff,
1854 0xff, SCSI_CONTROL_MASK},
1855};
1856
1857static bool tcm_is_3pc_enabled(struct se_cmd *cmd)
1858{
1859 struct se_device *dev = cmd->se_dev;
1860
1861 return dev->dev_attrib.emulate_3pc;
1862}
1863
1864static struct target_opcode_descriptor tcm_opcode_extended_copy_lid1 = {
1865 .support = SCSI_SUPPORT_FULL,
1866 .serv_action_valid = 1,
1867 .opcode = EXTENDED_COPY,
1868 .cdb_size = 16,
1869 .usage_bits = {EXTENDED_COPY, 0x00, 0x00, 0x00,
1870 0x00, 0x00, 0x00, 0x00,
1871 0x00, 0x00, 0xff, 0xff,
1872 0xff, 0xff, 0x00, SCSI_CONTROL_MASK},
1873 .enabled = tcm_is_3pc_enabled,
1874};
1875
1876static struct target_opcode_descriptor tcm_opcode_rcv_copy_res_op_params = {
1877 .support = SCSI_SUPPORT_FULL,
1878 .serv_action_valid = 1,
1879 .opcode = RECEIVE_COPY_RESULTS,
1880 .service_action = RCR_SA_OPERATING_PARAMETERS,
1881 .cdb_size = 16,
1882 .usage_bits = {RECEIVE_COPY_RESULTS, RCR_SA_OPERATING_PARAMETERS,
1883 0x00, 0x00,
1884 0x00, 0x00, 0x00, 0x00,
1885 0x00, 0x00, 0xff, 0xff,
1886 0xff, 0xff, 0x00, SCSI_CONTROL_MASK},
1887 .enabled = tcm_is_3pc_enabled,
1888};
1889
1890static struct target_opcode_descriptor tcm_opcode_report_luns = {
1891 .support = SCSI_SUPPORT_FULL,
1892 .opcode = REPORT_LUNS,
1893 .cdb_size = 12,
1894 .usage_bits = {REPORT_LUNS, 0x00, 0xff, 0x00,
1895 0x00, 0x00, 0xff, 0xff,
1896 0xff, 0xff, 0x00, SCSI_CONTROL_MASK},
1897};
1898
1899static struct target_opcode_descriptor tcm_opcode_test_unit_ready = {
1900 .support = SCSI_SUPPORT_FULL,
1901 .opcode = TEST_UNIT_READY,
1902 .cdb_size = 6,
1903 .usage_bits = {TEST_UNIT_READY, 0x00, 0x00, 0x00,
1904 0x00, SCSI_CONTROL_MASK},
1905};
1906
1907static struct target_opcode_descriptor tcm_opcode_report_target_pgs = {
1908 .support = SCSI_SUPPORT_FULL,
1909 .serv_action_valid = 1,
1910 .opcode = MAINTENANCE_IN,
1911 .service_action = MI_REPORT_TARGET_PGS,
1912 .cdb_size = 12,
1913 .usage_bits = {MAINTENANCE_IN, 0xE0 | MI_REPORT_TARGET_PGS, 0x00, 0x00,
1914 0x00, 0x00, 0xff, 0xff,
1915 0xff, 0xff, 0x00, SCSI_CONTROL_MASK},
1916};
1917
1918
1919static bool spc_rsoc_enabled(struct se_cmd *cmd)
1920{
1921 struct se_device *dev = cmd->se_dev;
1922
1923 return dev->dev_attrib.emulate_rsoc;
1924}
1925
1926static struct target_opcode_descriptor tcm_opcode_report_supp_opcodes = {
1927 .support = SCSI_SUPPORT_FULL,
1928 .serv_action_valid = 1,
1929 .opcode = MAINTENANCE_IN,
1930 .service_action = MI_REPORT_SUPPORTED_OPERATION_CODES,
1931 .cdb_size = 12,
1932 .usage_bits = {MAINTENANCE_IN, MI_REPORT_SUPPORTED_OPERATION_CODES,
1933 0x87, 0xff,
1934 0xff, 0xff, 0xff, 0xff,
1935 0xff, 0xff, 0x00, SCSI_CONTROL_MASK},
1936 .enabled = spc_rsoc_enabled,
1937};
1938
1939static bool tcm_is_set_tpg_enabled(struct se_cmd *cmd)
1940{
1941 struct t10_alua_tg_pt_gp *l_tg_pt_gp;
1942 struct se_lun *l_lun = cmd->se_lun;
1943
1944 rcu_read_lock();
1945 l_tg_pt_gp = rcu_dereference(l_lun->lun_tg_pt_gp);
1946 if (!l_tg_pt_gp) {
1947 rcu_read_unlock();
1948 return false;
1949 }
1950 if (!(l_tg_pt_gp->tg_pt_gp_alua_access_type & TPGS_EXPLICIT_ALUA)) {
1951 rcu_read_unlock();
1952 return false;
1953 }
1954 rcu_read_unlock();
1955
1956 return true;
1957}
1958
1959static struct target_opcode_descriptor tcm_opcode_set_tpg = {
1960 .support = SCSI_SUPPORT_FULL,
1961 .serv_action_valid = 1,
1962 .opcode = MAINTENANCE_OUT,
1963 .service_action = MO_SET_TARGET_PGS,
1964 .cdb_size = 12,
1965 .usage_bits = {MAINTENANCE_OUT, MO_SET_TARGET_PGS, 0x00, 0x00,
1966 0x00, 0x00, 0xff, 0xff,
1967 0xff, 0xff, 0x00, SCSI_CONTROL_MASK},
1968 .enabled = tcm_is_set_tpg_enabled,
1969};
1970
1971static struct target_opcode_descriptor *tcm_supported_opcodes[] = {
1972 &tcm_opcode_read6,
1973 &tcm_opcode_read10,
1974 &tcm_opcode_read12,
1975 &tcm_opcode_read16,
1976 &tcm_opcode_write6,
1977 &tcm_opcode_write10,
1978 &tcm_opcode_write_verify10,
1979 &tcm_opcode_write12,
1980 &tcm_opcode_write16,
1981 &tcm_opcode_write_verify16,
1982 &tcm_opcode_write_same32,
1983 &tcm_opcode_compare_write,
1984 &tcm_opcode_read_capacity,
1985 &tcm_opcode_read_capacity16,
1986 &tcm_opcode_read_report_refferals,
1987 &tcm_opcode_sync_cache,
1988 &tcm_opcode_sync_cache16,
1989 &tcm_opcode_unmap,
1990 &tcm_opcode_write_same,
1991 &tcm_opcode_write_same16,
1992 &tcm_opcode_verify,
1993 &tcm_opcode_verify16,
1994 &tcm_opcode_start_stop,
1995 &tcm_opcode_mode_select,
1996 &tcm_opcode_mode_select10,
1997 &tcm_opcode_mode_sense,
1998 &tcm_opcode_mode_sense10,
1999 &tcm_opcode_pri_read_keys,
2000 &tcm_opcode_pri_read_resrv,
2001 &tcm_opcode_pri_read_caps,
2002 &tcm_opcode_pri_read_full_status,
2003 &tcm_opcode_pro_register,
2004 &tcm_opcode_pro_reserve,
2005 &tcm_opcode_pro_release,
2006 &tcm_opcode_pro_clear,
2007 &tcm_opcode_pro_preempt,
2008 &tcm_opcode_pro_preempt_abort,
2009 &tcm_opcode_pro_reg_ign_exist,
2010 &tcm_opcode_pro_register_move,
2011 &tcm_opcode_release,
2012 &tcm_opcode_release10,
2013 &tcm_opcode_reserve,
2014 &tcm_opcode_reserve10,
2015 &tcm_opcode_request_sense,
2016 &tcm_opcode_inquiry,
2017 &tcm_opcode_extended_copy_lid1,
2018 &tcm_opcode_rcv_copy_res_op_params,
2019 &tcm_opcode_report_luns,
2020 &tcm_opcode_test_unit_ready,
2021 &tcm_opcode_report_target_pgs,
2022 &tcm_opcode_report_supp_opcodes,
2023 &tcm_opcode_set_tpg,
2024};
2025
2026static int
2027spc_rsoc_encode_command_timeouts_descriptor(unsigned char *buf, u8 ctdp,
2028 struct target_opcode_descriptor *descr)
2029{
2030 if (!ctdp)
2031 return 0;
2032
2033 put_unaligned_be16(0xa, buf);
2034 buf[3] = descr->specific_timeout;
2035 put_unaligned_be32(descr->nominal_timeout, &buf[4]);
2036 put_unaligned_be32(descr->recommended_timeout, &buf[8]);
2037
2038 return 12;
2039}
2040
2041static int
2042spc_rsoc_encode_command_descriptor(unsigned char *buf, u8 ctdp,
2043 struct target_opcode_descriptor *descr)
2044{
2045 int td_size = 0;
2046
2047 buf[0] = descr->opcode;
2048
2049 put_unaligned_be16(descr->service_action, &buf[2]);
2050
2051 buf[5] = (ctdp << 1) | descr->serv_action_valid;
2052 put_unaligned_be16(descr->cdb_size, &buf[6]);
2053
2054 td_size = spc_rsoc_encode_command_timeouts_descriptor(&buf[8], ctdp,
2055 descr);
2056
2057 return 8 + td_size;
2058}
2059
2060static int
2061spc_rsoc_encode_one_command_descriptor(unsigned char *buf, u8 ctdp,
2062 struct target_opcode_descriptor *descr,
2063 struct se_device *dev)
2064{
2065 int td_size = 0;
2066
2067 if (!descr) {
2068 buf[1] = (ctdp << 7) | SCSI_SUPPORT_NOT_SUPPORTED;
2069 return 2;
2070 }
2071
2072 buf[1] = (ctdp << 7) | SCSI_SUPPORT_FULL;
2073 put_unaligned_be16(descr->cdb_size, &buf[2]);
2074 memcpy(&buf[4], descr->usage_bits, descr->cdb_size);
2075 if (descr->update_usage_bits)
2076 descr->update_usage_bits(&buf[4], dev);
2077
2078 td_size = spc_rsoc_encode_command_timeouts_descriptor(
2079 &buf[4 + descr->cdb_size], ctdp, descr);
2080
2081 return 4 + descr->cdb_size + td_size;
2082}
2083
2084static sense_reason_t
2085spc_rsoc_get_descr(struct se_cmd *cmd, struct target_opcode_descriptor **opcode)
2086{
2087 struct target_opcode_descriptor *descr;
2088 struct se_session *sess = cmd->se_sess;
2089 unsigned char *cdb = cmd->t_task_cdb;
2090 u8 opts = cdb[2] & 0x3;
2091 u8 requested_opcode;
2092 u16 requested_sa;
2093 int i;
2094
2095 requested_opcode = cdb[3];
2096 requested_sa = ((u16)cdb[4]) << 8 | cdb[5];
2097 *opcode = NULL;
2098
2099 if (opts > 3) {
2100 pr_debug("TARGET_CORE[%s]: Invalid REPORT SUPPORTED OPERATION CODES"
2101 " with unsupported REPORTING OPTIONS %#x for 0x%08llx from %s\n",
2102 cmd->se_tfo->fabric_name, opts,
2103 cmd->se_lun->unpacked_lun,
2104 sess->se_node_acl->initiatorname);
2105 return TCM_INVALID_CDB_FIELD;
2106 }
2107
2108 for (i = 0; i < ARRAY_SIZE(tcm_supported_opcodes); i++) {
2109 descr = tcm_supported_opcodes[i];
2110 if (descr->opcode != requested_opcode)
2111 continue;
2112
2113 switch (opts) {
2114 case 0x1:
2115 /*
2116 * If the REQUESTED OPERATION CODE field specifies an
2117 * operation code for which the device server implements
2118 * service actions, then the device server shall
2119 * terminate the command with CHECK CONDITION status,
2120 * with the sense key set to ILLEGAL REQUEST, and the
2121 * additional sense code set to INVALID FIELD IN CDB
2122 */
2123 if (descr->serv_action_valid)
2124 return TCM_INVALID_CDB_FIELD;
2125
2126 if (!descr->enabled || descr->enabled(cmd))
2127 *opcode = descr;
2128 break;
2129 case 0x2:
2130 /*
2131 * If the REQUESTED OPERATION CODE field specifies an
2132 * operation code for which the device server does not
2133 * implement service actions, then the device server
2134 * shall terminate the command with CHECK CONDITION
2135 * status, with the sense key set to ILLEGAL REQUEST,
2136 * and the additional sense code set to INVALID FIELD IN CDB.
2137 */
2138 if (descr->serv_action_valid &&
2139 descr->service_action == requested_sa) {
2140 if (!descr->enabled || descr->enabled(cmd))
2141 *opcode = descr;
2142 } else if (!descr->serv_action_valid)
2143 return TCM_INVALID_CDB_FIELD;
2144 break;
2145 case 0x3:
2146 /*
2147 * The command support data for the operation code and
2148 * service action a specified in the REQUESTED OPERATION
2149 * CODE field and REQUESTED SERVICE ACTION field shall
2150 * be returned in the one_command parameter data format.
2151 */
2152 if (descr->service_action == requested_sa)
2153 if (!descr->enabled || descr->enabled(cmd))
2154 *opcode = descr;
2155 break;
2156 }
2157 }
2158
2159 return 0;
2160}
2161
2162static sense_reason_t
2163spc_emulate_report_supp_op_codes(struct se_cmd *cmd)
2164{
2165 int descr_num = ARRAY_SIZE(tcm_supported_opcodes);
2166 struct target_opcode_descriptor *descr = NULL;
2167 unsigned char *cdb = cmd->t_task_cdb;
2168 u8 rctd = (cdb[2] >> 7) & 0x1;
2169 unsigned char *buf = NULL;
2170 int response_length = 0;
2171 u8 opts = cdb[2] & 0x3;
2172 unsigned char *rbuf;
2173 sense_reason_t ret = 0;
2174 int i;
2175
2176 if (!cmd->se_dev->dev_attrib.emulate_rsoc)
2177 return TCM_UNSUPPORTED_SCSI_OPCODE;
2178
2179 rbuf = transport_kmap_data_sg(cmd);
2180 if (cmd->data_length && !rbuf) {
2181 ret = TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE;
2182 goto out;
2183 }
2184
2185 if (opts == 0)
2186 response_length = 4 + (8 + rctd * 12) * descr_num;
2187 else {
2188 ret = spc_rsoc_get_descr(cmd, &descr);
2189 if (ret)
2190 goto out;
2191
2192 if (descr)
2193 response_length = 4 + descr->cdb_size + rctd * 12;
2194 else
2195 response_length = 2;
2196 }
2197
2198 buf = kzalloc(response_length, GFP_KERNEL);
2199 if (!buf) {
2200 ret = TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE;
2201 goto out;
2202 }
2203 response_length = 0;
2204
2205 if (opts == 0) {
2206 response_length += 4;
2207
2208 for (i = 0; i < ARRAY_SIZE(tcm_supported_opcodes); i++) {
2209 descr = tcm_supported_opcodes[i];
2210 if (descr->enabled && !descr->enabled(cmd))
2211 continue;
2212
2213 response_length += spc_rsoc_encode_command_descriptor(
2214 &buf[response_length], rctd, descr);
2215 }
2216 put_unaligned_be32(response_length - 3, buf);
2217 } else {
2218 response_length = spc_rsoc_encode_one_command_descriptor(
2219 &buf[response_length], rctd, descr,
2220 cmd->se_dev);
2221 }
2222
2223 memcpy(rbuf, buf, min_t(u32, response_length, cmd->data_length));
2224out:
2225 kfree(buf);
2226 transport_kunmap_data_sg(cmd);
2227
2228 if (!ret)
2229 target_complete_cmd_with_length(cmd, SAM_STAT_GOOD, response_length);
2230 return ret;
2231}
2232
2233sense_reason_t
2234spc_parse_cdb(struct se_cmd *cmd, unsigned int *size)
2235{
2236 struct se_device *dev = cmd->se_dev;
2237 unsigned char *cdb = cmd->t_task_cdb;
2238
2239 if (!dev->dev_attrib.emulate_pr &&
2240 ((cdb[0] == PERSISTENT_RESERVE_IN) ||
2241 (cdb[0] == PERSISTENT_RESERVE_OUT) ||
2242 (cdb[0] == RELEASE || cdb[0] == RELEASE_10) ||
2243 (cdb[0] == RESERVE || cdb[0] == RESERVE_10))) {
2244 return TCM_UNSUPPORTED_SCSI_OPCODE;
2245 }
2246
2247 switch (cdb[0]) {
2248 case MODE_SELECT:
2249 *size = cdb[4];
2250 cmd->execute_cmd = spc_emulate_modeselect;
2251 break;
2252 case MODE_SELECT_10:
2253 *size = get_unaligned_be16(&cdb[7]);
2254 cmd->execute_cmd = spc_emulate_modeselect;
2255 break;
2256 case MODE_SENSE:
2257 *size = cdb[4];
2258 cmd->execute_cmd = spc_emulate_modesense;
2259 break;
2260 case MODE_SENSE_10:
2261 *size = get_unaligned_be16(&cdb[7]);
2262 cmd->execute_cmd = spc_emulate_modesense;
2263 break;
2264 case LOG_SELECT:
2265 case LOG_SENSE:
2266 *size = get_unaligned_be16(&cdb[7]);
2267 break;
2268 case PERSISTENT_RESERVE_IN:
2269 *size = get_unaligned_be16(&cdb[7]);
2270 cmd->execute_cmd = target_scsi3_emulate_pr_in;
2271 break;
2272 case PERSISTENT_RESERVE_OUT:
2273 *size = get_unaligned_be32(&cdb[5]);
2274 cmd->execute_cmd = target_scsi3_emulate_pr_out;
2275 break;
2276 case RELEASE:
2277 case RELEASE_10:
2278 if (cdb[0] == RELEASE_10)
2279 *size = get_unaligned_be16(&cdb[7]);
2280 else
2281 *size = cmd->data_length;
2282
2283 cmd->execute_cmd = target_scsi2_reservation_release;
2284 break;
2285 case RESERVE:
2286 case RESERVE_10:
2287 /*
2288 * The SPC-2 RESERVE does not contain a size in the SCSI CDB.
2289 * Assume the passthrough or $FABRIC_MOD will tell us about it.
2290 */
2291 if (cdb[0] == RESERVE_10)
2292 *size = get_unaligned_be16(&cdb[7]);
2293 else
2294 *size = cmd->data_length;
2295
2296 cmd->execute_cmd = target_scsi2_reservation_reserve;
2297 break;
2298 case REQUEST_SENSE:
2299 *size = cdb[4];
2300 cmd->execute_cmd = spc_emulate_request_sense;
2301 break;
2302 case INQUIRY:
2303 *size = get_unaligned_be16(&cdb[3]);
2304
2305 /*
2306 * Do implicit HEAD_OF_QUEUE processing for INQUIRY.
2307 * See spc4r17 section 5.3
2308 */
2309 cmd->sam_task_attr = TCM_HEAD_TAG;
2310 cmd->execute_cmd = spc_emulate_inquiry;
2311 break;
2312 case SECURITY_PROTOCOL_IN:
2313 case SECURITY_PROTOCOL_OUT:
2314 *size = get_unaligned_be32(&cdb[6]);
2315 break;
2316 case EXTENDED_COPY:
2317 *size = get_unaligned_be32(&cdb[10]);
2318 cmd->execute_cmd = target_do_xcopy;
2319 break;
2320 case RECEIVE_COPY_RESULTS:
2321 *size = get_unaligned_be32(&cdb[10]);
2322 cmd->execute_cmd = target_do_receive_copy_results;
2323 break;
2324 case READ_ATTRIBUTE:
2325 case WRITE_ATTRIBUTE:
2326 *size = get_unaligned_be32(&cdb[10]);
2327 break;
2328 case RECEIVE_DIAGNOSTIC:
2329 case SEND_DIAGNOSTIC:
2330 *size = get_unaligned_be16(&cdb[3]);
2331 break;
2332 case WRITE_BUFFER:
2333 *size = get_unaligned_be24(&cdb[6]);
2334 break;
2335 case REPORT_LUNS:
2336 cmd->execute_cmd = spc_emulate_report_luns;
2337 *size = get_unaligned_be32(&cdb[6]);
2338 /*
2339 * Do implicit HEAD_OF_QUEUE processing for REPORT_LUNS
2340 * See spc4r17 section 5.3
2341 */
2342 cmd->sam_task_attr = TCM_HEAD_TAG;
2343 break;
2344 case TEST_UNIT_READY:
2345 cmd->execute_cmd = spc_emulate_testunitready;
2346 *size = 0;
2347 break;
2348 case MAINTENANCE_IN:
2349 if (dev->transport->get_device_type(dev) != TYPE_ROM) {
2350 /*
2351 * MAINTENANCE_IN from SCC-2
2352 * Check for emulated MI_REPORT_TARGET_PGS
2353 */
2354 if ((cdb[1] & 0x1f) == MI_REPORT_TARGET_PGS) {
2355 cmd->execute_cmd =
2356 target_emulate_report_target_port_groups;
2357 }
2358 if ((cdb[1] & 0x1f) ==
2359 MI_REPORT_SUPPORTED_OPERATION_CODES)
2360 cmd->execute_cmd =
2361 spc_emulate_report_supp_op_codes;
2362 *size = get_unaligned_be32(&cdb[6]);
2363 } else {
2364 /*
2365 * GPCMD_SEND_KEY from multi media commands
2366 */
2367 *size = get_unaligned_be16(&cdb[8]);
2368 }
2369 break;
2370 case MAINTENANCE_OUT:
2371 if (dev->transport->get_device_type(dev) != TYPE_ROM) {
2372 /*
2373 * MAINTENANCE_OUT from SCC-2
2374 * Check for emulated MO_SET_TARGET_PGS.
2375 */
2376 if (cdb[1] == MO_SET_TARGET_PGS) {
2377 cmd->execute_cmd =
2378 target_emulate_set_target_port_groups;
2379 }
2380 *size = get_unaligned_be32(&cdb[6]);
2381 } else {
2382 /*
2383 * GPCMD_SEND_KEY from multi media commands
2384 */
2385 *size = get_unaligned_be16(&cdb[8]);
2386 }
2387 break;
2388 default:
2389 return TCM_UNSUPPORTED_SCSI_OPCODE;
2390 }
2391
2392 return 0;
2393}
2394EXPORT_SYMBOL(spc_parse_cdb);
1/*
2 * SCSI Primary Commands (SPC) parsing and emulation.
3 *
4 * (c) Copyright 2002-2013 Datera, Inc.
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#include "target_core_xcopy.h"
39
40static 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 explicit and/or implicit 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
69sense_reason_t
70spc_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 struct se_session *sess = cmd->se_sess;
75
76 /* Set RMB (removable media) for tape devices */
77 if (dev->transport->get_device_type(dev) == TYPE_TAPE)
78 buf[1] = 0x80;
79
80 buf[2] = 0x05; /* SPC-3 */
81
82 /*
83 * NORMACA and HISUP = 0, RESPONSE DATA FORMAT = 2
84 *
85 * SPC4 says:
86 * A RESPONSE DATA FORMAT field set to 2h indicates that the
87 * standard INQUIRY data is in the format defined in this
88 * standard. Response data format values less than 2h are
89 * obsolete. Response data format values greater than 2h are
90 * reserved.
91 */
92 buf[3] = 2;
93
94 /*
95 * Enable SCCS and TPGS fields for Emulated ALUA
96 */
97 spc_fill_alua_data(lun->lun_sep, buf);
98
99 /*
100 * Set Third-Party Copy (3PC) bit to indicate support for EXTENDED_COPY
101 */
102 if (dev->dev_attrib.emulate_3pc)
103 buf[5] |= 0x8;
104 /*
105 * Set Protection (PROTECT) bit when DIF has been enabled on the
106 * device, and the transport supports VERIFY + PASS.
107 */
108 if (sess->sup_prot_ops & (TARGET_PROT_DIN_PASS | TARGET_PROT_DOUT_PASS)) {
109 if (dev->dev_attrib.pi_prot_type)
110 buf[5] |= 0x1;
111 }
112
113 buf[7] = 0x2; /* CmdQue=1 */
114
115 memcpy(&buf[8], "LIO-ORG ", 8);
116 memset(&buf[16], 0x20, 16);
117 memcpy(&buf[16], dev->t10_wwn.model,
118 min_t(size_t, strlen(dev->t10_wwn.model), 16));
119 memcpy(&buf[32], dev->t10_wwn.revision,
120 min_t(size_t, strlen(dev->t10_wwn.revision), 4));
121 buf[4] = 31; /* Set additional length to 31 */
122
123 return 0;
124}
125EXPORT_SYMBOL(spc_emulate_inquiry_std);
126
127/* unit serial number */
128static sense_reason_t
129spc_emulate_evpd_80(struct se_cmd *cmd, unsigned char *buf)
130{
131 struct se_device *dev = cmd->se_dev;
132 u16 len = 0;
133
134 if (dev->dev_flags & DF_EMULATED_VPD_UNIT_SERIAL) {
135 u32 unit_serial_len;
136
137 unit_serial_len = strlen(dev->t10_wwn.unit_serial);
138 unit_serial_len++; /* For NULL Terminator */
139
140 len += sprintf(&buf[4], "%s", dev->t10_wwn.unit_serial);
141 len++; /* Extra Byte for NULL Terminator */
142 buf[3] = len;
143 }
144 return 0;
145}
146
147void spc_parse_naa_6h_vendor_specific(struct se_device *dev,
148 unsigned char *buf)
149{
150 unsigned char *p = &dev->t10_wwn.unit_serial[0];
151 int cnt;
152 bool next = true;
153
154 /*
155 * Generate up to 36 bits of VENDOR SPECIFIC IDENTIFIER starting on
156 * byte 3 bit 3-0 for NAA IEEE Registered Extended DESIGNATOR field
157 * format, followed by 64 bits of VENDOR SPECIFIC IDENTIFIER EXTENSION
158 * to complete the payload. These are based from VPD=0x80 PRODUCT SERIAL
159 * NUMBER set via vpd_unit_serial in target_core_configfs.c to ensure
160 * per device uniqeness.
161 */
162 for (cnt = 0; *p && cnt < 13; p++) {
163 int val = hex_to_bin(*p);
164
165 if (val < 0)
166 continue;
167
168 if (next) {
169 next = false;
170 buf[cnt++] |= val;
171 } else {
172 next = true;
173 buf[cnt] = val << 4;
174 }
175 }
176}
177
178/*
179 * Device identification VPD, for a complete list of
180 * DESIGNATOR TYPEs see spc4r17 Table 459.
181 */
182sense_reason_t
183spc_emulate_evpd_83(struct se_cmd *cmd, unsigned char *buf)
184{
185 struct se_device *dev = cmd->se_dev;
186 struct se_lun *lun = cmd->se_lun;
187 struct se_port *port = NULL;
188 struct se_portal_group *tpg = NULL;
189 struct t10_alua_lu_gp_member *lu_gp_mem;
190 struct t10_alua_tg_pt_gp *tg_pt_gp;
191 struct t10_alua_tg_pt_gp_member *tg_pt_gp_mem;
192 unsigned char *prod = &dev->t10_wwn.model[0];
193 u32 prod_len;
194 u32 unit_serial_len, off = 0;
195 u16 len = 0, id_len;
196
197 off = 4;
198
199 /*
200 * NAA IEEE Registered Extended Assigned designator format, see
201 * spc4r17 section 7.7.3.6.5
202 *
203 * We depend upon a target_core_mod/ConfigFS provided
204 * /sys/kernel/config/target/core/$HBA/$DEV/wwn/vpd_unit_serial
205 * value in order to return the NAA id.
206 */
207 if (!(dev->dev_flags & DF_EMULATED_VPD_UNIT_SERIAL))
208 goto check_t10_vend_desc;
209
210 /* CODE SET == Binary */
211 buf[off++] = 0x1;
212
213 /* Set ASSOCIATION == addressed logical unit: 0)b */
214 buf[off] = 0x00;
215
216 /* Identifier/Designator type == NAA identifier */
217 buf[off++] |= 0x3;
218 off++;
219
220 /* Identifier/Designator length */
221 buf[off++] = 0x10;
222
223 /*
224 * Start NAA IEEE Registered Extended Identifier/Designator
225 */
226 buf[off++] = (0x6 << 4);
227
228 /*
229 * Use OpenFabrics IEEE Company ID: 00 14 05
230 */
231 buf[off++] = 0x01;
232 buf[off++] = 0x40;
233 buf[off] = (0x5 << 4);
234
235 /*
236 * Return ConfigFS Unit Serial Number information for
237 * VENDOR_SPECIFIC_IDENTIFIER and
238 * VENDOR_SPECIFIC_IDENTIFIER_EXTENTION
239 */
240 spc_parse_naa_6h_vendor_specific(dev, &buf[off]);
241
242 len = 20;
243 off = (len + 4);
244
245check_t10_vend_desc:
246 /*
247 * T10 Vendor Identifier Page, see spc4r17 section 7.7.3.4
248 */
249 id_len = 8; /* For Vendor field */
250 prod_len = 4; /* For VPD Header */
251 prod_len += 8; /* For Vendor field */
252 prod_len += strlen(prod);
253 prod_len++; /* For : */
254
255 if (dev->dev_flags & DF_EMULATED_VPD_UNIT_SERIAL) {
256 unit_serial_len = strlen(&dev->t10_wwn.unit_serial[0]);
257 unit_serial_len++; /* For NULL Terminator */
258
259 id_len += sprintf(&buf[off+12], "%s:%s", prod,
260 &dev->t10_wwn.unit_serial[0]);
261 }
262 buf[off] = 0x2; /* ASCII */
263 buf[off+1] = 0x1; /* T10 Vendor ID */
264 buf[off+2] = 0x0;
265 memcpy(&buf[off+4], "LIO-ORG", 8);
266 /* Extra Byte for NULL Terminator */
267 id_len++;
268 /* Identifier Length */
269 buf[off+3] = id_len;
270 /* Header size for Designation descriptor */
271 len += (id_len + 4);
272 off += (id_len + 4);
273 /*
274 * struct se_port is only set for INQUIRY VPD=1 through $FABRIC_MOD
275 */
276 port = lun->lun_sep;
277 if (port) {
278 struct t10_alua_lu_gp *lu_gp;
279 u32 padding, scsi_name_len, scsi_target_len;
280 u16 lu_gp_id = 0;
281 u16 tg_pt_gp_id = 0;
282 u16 tpgt;
283
284 tpg = port->sep_tpg;
285 /*
286 * Relative target port identifer, see spc4r17
287 * section 7.7.3.7
288 *
289 * Get the PROTOCOL IDENTIFIER as defined by spc4r17
290 * section 7.5.1 Table 362
291 */
292 buf[off] =
293 (tpg->se_tpg_tfo->get_fabric_proto_ident(tpg) << 4);
294 buf[off++] |= 0x1; /* CODE SET == Binary */
295 buf[off] = 0x80; /* Set PIV=1 */
296 /* Set ASSOCIATION == target port: 01b */
297 buf[off] |= 0x10;
298 /* DESIGNATOR TYPE == Relative target port identifer */
299 buf[off++] |= 0x4;
300 off++; /* Skip over Reserved */
301 buf[off++] = 4; /* DESIGNATOR LENGTH */
302 /* Skip over Obsolete field in RTPI payload
303 * in Table 472 */
304 off += 2;
305 buf[off++] = ((port->sep_rtpi >> 8) & 0xff);
306 buf[off++] = (port->sep_rtpi & 0xff);
307 len += 8; /* Header size + Designation descriptor */
308 /*
309 * Target port group identifier, see spc4r17
310 * section 7.7.3.8
311 *
312 * Get the PROTOCOL IDENTIFIER as defined by spc4r17
313 * section 7.5.1 Table 362
314 */
315 tg_pt_gp_mem = port->sep_alua_tg_pt_gp_mem;
316 if (!tg_pt_gp_mem)
317 goto check_lu_gp;
318
319 spin_lock(&tg_pt_gp_mem->tg_pt_gp_mem_lock);
320 tg_pt_gp = tg_pt_gp_mem->tg_pt_gp;
321 if (!tg_pt_gp) {
322 spin_unlock(&tg_pt_gp_mem->tg_pt_gp_mem_lock);
323 goto check_lu_gp;
324 }
325 tg_pt_gp_id = tg_pt_gp->tg_pt_gp_id;
326 spin_unlock(&tg_pt_gp_mem->tg_pt_gp_mem_lock);
327
328 buf[off] =
329 (tpg->se_tpg_tfo->get_fabric_proto_ident(tpg) << 4);
330 buf[off++] |= 0x1; /* CODE SET == Binary */
331 buf[off] = 0x80; /* Set PIV=1 */
332 /* Set ASSOCIATION == target port: 01b */
333 buf[off] |= 0x10;
334 /* DESIGNATOR TYPE == Target port group identifier */
335 buf[off++] |= 0x5;
336 off++; /* Skip over Reserved */
337 buf[off++] = 4; /* DESIGNATOR LENGTH */
338 off += 2; /* Skip over Reserved Field */
339 buf[off++] = ((tg_pt_gp_id >> 8) & 0xff);
340 buf[off++] = (tg_pt_gp_id & 0xff);
341 len += 8; /* Header size + Designation descriptor */
342 /*
343 * Logical Unit Group identifier, see spc4r17
344 * section 7.7.3.8
345 */
346check_lu_gp:
347 lu_gp_mem = dev->dev_alua_lu_gp_mem;
348 if (!lu_gp_mem)
349 goto check_scsi_name;
350
351 spin_lock(&lu_gp_mem->lu_gp_mem_lock);
352 lu_gp = lu_gp_mem->lu_gp;
353 if (!lu_gp) {
354 spin_unlock(&lu_gp_mem->lu_gp_mem_lock);
355 goto check_scsi_name;
356 }
357 lu_gp_id = lu_gp->lu_gp_id;
358 spin_unlock(&lu_gp_mem->lu_gp_mem_lock);
359
360 buf[off++] |= 0x1; /* CODE SET == Binary */
361 /* DESIGNATOR TYPE == Logical Unit Group identifier */
362 buf[off++] |= 0x6;
363 off++; /* Skip over Reserved */
364 buf[off++] = 4; /* DESIGNATOR LENGTH */
365 off += 2; /* Skip over Reserved Field */
366 buf[off++] = ((lu_gp_id >> 8) & 0xff);
367 buf[off++] = (lu_gp_id & 0xff);
368 len += 8; /* Header size + Designation descriptor */
369 /*
370 * SCSI name string designator, see spc4r17
371 * section 7.7.3.11
372 *
373 * Get the PROTOCOL IDENTIFIER as defined by spc4r17
374 * section 7.5.1 Table 362
375 */
376check_scsi_name:
377 buf[off] =
378 (tpg->se_tpg_tfo->get_fabric_proto_ident(tpg) << 4);
379 buf[off++] |= 0x3; /* CODE SET == UTF-8 */
380 buf[off] = 0x80; /* Set PIV=1 */
381 /* Set ASSOCIATION == target port: 01b */
382 buf[off] |= 0x10;
383 /* DESIGNATOR TYPE == SCSI name string */
384 buf[off++] |= 0x8;
385 off += 2; /* Skip over Reserved and length */
386 /*
387 * SCSI name string identifer containing, $FABRIC_MOD
388 * dependent information. For LIO-Target and iSCSI
389 * Target Port, this means "<iSCSI name>,t,0x<TPGT> in
390 * UTF-8 encoding.
391 */
392 tpgt = tpg->se_tpg_tfo->tpg_get_tag(tpg);
393 scsi_name_len = sprintf(&buf[off], "%s,t,0x%04x",
394 tpg->se_tpg_tfo->tpg_get_wwn(tpg), tpgt);
395 scsi_name_len += 1 /* Include NULL terminator */;
396 /*
397 * The null-terminated, null-padded (see 4.4.2) SCSI
398 * NAME STRING field contains a UTF-8 format string.
399 * The number of bytes in the SCSI NAME STRING field
400 * (i.e., the value in the DESIGNATOR LENGTH field)
401 * shall be no larger than 256 and shall be a multiple
402 * of four.
403 */
404 padding = ((-scsi_name_len) & 3);
405 if (padding)
406 scsi_name_len += padding;
407 if (scsi_name_len > 256)
408 scsi_name_len = 256;
409
410 buf[off-1] = scsi_name_len;
411 off += scsi_name_len;
412 /* Header size + Designation descriptor */
413 len += (scsi_name_len + 4);
414
415 /*
416 * Target device designator
417 */
418 buf[off] =
419 (tpg->se_tpg_tfo->get_fabric_proto_ident(tpg) << 4);
420 buf[off++] |= 0x3; /* CODE SET == UTF-8 */
421 buf[off] = 0x80; /* Set PIV=1 */
422 /* Set ASSOCIATION == target device: 10b */
423 buf[off] |= 0x20;
424 /* DESIGNATOR TYPE == SCSI name string */
425 buf[off++] |= 0x8;
426 off += 2; /* Skip over Reserved and length */
427 /*
428 * SCSI name string identifer containing, $FABRIC_MOD
429 * dependent information. For LIO-Target and iSCSI
430 * Target Port, this means "<iSCSI name>" in
431 * UTF-8 encoding.
432 */
433 scsi_target_len = sprintf(&buf[off], "%s",
434 tpg->se_tpg_tfo->tpg_get_wwn(tpg));
435 scsi_target_len += 1 /* Include NULL terminator */;
436 /*
437 * The null-terminated, null-padded (see 4.4.2) SCSI
438 * NAME STRING field contains a UTF-8 format string.
439 * The number of bytes in the SCSI NAME STRING field
440 * (i.e., the value in the DESIGNATOR LENGTH field)
441 * shall be no larger than 256 and shall be a multiple
442 * of four.
443 */
444 padding = ((-scsi_target_len) & 3);
445 if (padding)
446 scsi_target_len += padding;
447 if (scsi_target_len > 256)
448 scsi_target_len = 256;
449
450 buf[off-1] = scsi_target_len;
451 off += scsi_target_len;
452
453 /* Header size + Designation descriptor */
454 len += (scsi_target_len + 4);
455 }
456 buf[2] = ((len >> 8) & 0xff);
457 buf[3] = (len & 0xff); /* Page Length for VPD 0x83 */
458 return 0;
459}
460EXPORT_SYMBOL(spc_emulate_evpd_83);
461
462static bool
463spc_check_dev_wce(struct se_device *dev)
464{
465 bool wce = false;
466
467 if (dev->transport->get_write_cache)
468 wce = dev->transport->get_write_cache(dev);
469 else if (dev->dev_attrib.emulate_write_cache > 0)
470 wce = true;
471
472 return wce;
473}
474
475/* Extended INQUIRY Data VPD Page */
476static sense_reason_t
477spc_emulate_evpd_86(struct se_cmd *cmd, unsigned char *buf)
478{
479 struct se_device *dev = cmd->se_dev;
480 struct se_session *sess = cmd->se_sess;
481
482 buf[3] = 0x3c;
483 /*
484 * Set GRD_CHK + REF_CHK for TYPE1 protection, or GRD_CHK
485 * only for TYPE3 protection.
486 */
487 if (sess->sup_prot_ops & (TARGET_PROT_DIN_PASS | TARGET_PROT_DOUT_PASS)) {
488 if (dev->dev_attrib.pi_prot_type == TARGET_DIF_TYPE1_PROT)
489 buf[4] = 0x5;
490 else if (dev->dev_attrib.pi_prot_type == TARGET_DIF_TYPE3_PROT)
491 buf[4] = 0x4;
492 }
493
494 /* Set HEADSUP, ORDSUP, SIMPSUP */
495 buf[5] = 0x07;
496
497 /* If WriteCache emulation is enabled, set V_SUP */
498 if (spc_check_dev_wce(dev))
499 buf[6] = 0x01;
500 /* If an LBA map is present set R_SUP */
501 spin_lock(&cmd->se_dev->t10_alua.lba_map_lock);
502 if (!list_empty(&dev->t10_alua.lba_map_list))
503 buf[8] = 0x10;
504 spin_unlock(&cmd->se_dev->t10_alua.lba_map_lock);
505 return 0;
506}
507
508/* Block Limits VPD page */
509static sense_reason_t
510spc_emulate_evpd_b0(struct se_cmd *cmd, unsigned char *buf)
511{
512 struct se_device *dev = cmd->se_dev;
513 u32 max_sectors;
514 int have_tp = 0;
515 int opt, min;
516
517 /*
518 * Following spc3r22 section 6.5.3 Block Limits VPD page, when
519 * emulate_tpu=1 or emulate_tpws=1 we will be expect a
520 * different page length for Thin Provisioning.
521 */
522 if (dev->dev_attrib.emulate_tpu || dev->dev_attrib.emulate_tpws)
523 have_tp = 1;
524
525 buf[0] = dev->transport->get_device_type(dev);
526 buf[3] = have_tp ? 0x3c : 0x10;
527
528 /* Set WSNZ to 1 */
529 buf[4] = 0x01;
530 /*
531 * Set MAXIMUM COMPARE AND WRITE LENGTH
532 */
533 if (dev->dev_attrib.emulate_caw)
534 buf[5] = 0x01;
535
536 /*
537 * Set OPTIMAL TRANSFER LENGTH GRANULARITY
538 */
539 if (dev->transport->get_io_min && (min = dev->transport->get_io_min(dev)))
540 put_unaligned_be16(min / dev->dev_attrib.block_size, &buf[6]);
541 else
542 put_unaligned_be16(1, &buf[6]);
543
544 /*
545 * Set MAXIMUM TRANSFER LENGTH
546 */
547 max_sectors = min(dev->dev_attrib.fabric_max_sectors,
548 dev->dev_attrib.hw_max_sectors);
549 put_unaligned_be32(max_sectors, &buf[8]);
550
551 /*
552 * Set OPTIMAL TRANSFER LENGTH
553 */
554 if (dev->transport->get_io_opt && (opt = dev->transport->get_io_opt(dev)))
555 put_unaligned_be32(opt / dev->dev_attrib.block_size, &buf[12]);
556 else
557 put_unaligned_be32(dev->dev_attrib.optimal_sectors, &buf[12]);
558
559 /*
560 * Exit now if we don't support TP.
561 */
562 if (!have_tp)
563 goto max_write_same;
564
565 /*
566 * Set MAXIMUM UNMAP LBA COUNT
567 */
568 put_unaligned_be32(dev->dev_attrib.max_unmap_lba_count, &buf[20]);
569
570 /*
571 * Set MAXIMUM UNMAP BLOCK DESCRIPTOR COUNT
572 */
573 put_unaligned_be32(dev->dev_attrib.max_unmap_block_desc_count,
574 &buf[24]);
575
576 /*
577 * Set OPTIMAL UNMAP GRANULARITY
578 */
579 put_unaligned_be32(dev->dev_attrib.unmap_granularity, &buf[28]);
580
581 /*
582 * UNMAP GRANULARITY ALIGNMENT
583 */
584 put_unaligned_be32(dev->dev_attrib.unmap_granularity_alignment,
585 &buf[32]);
586 if (dev->dev_attrib.unmap_granularity_alignment != 0)
587 buf[32] |= 0x80; /* Set the UGAVALID bit */
588
589 /*
590 * MAXIMUM WRITE SAME LENGTH
591 */
592max_write_same:
593 put_unaligned_be64(dev->dev_attrib.max_write_same_len, &buf[36]);
594
595 return 0;
596}
597
598/* Block Device Characteristics VPD page */
599static sense_reason_t
600spc_emulate_evpd_b1(struct se_cmd *cmd, unsigned char *buf)
601{
602 struct se_device *dev = cmd->se_dev;
603
604 buf[0] = dev->transport->get_device_type(dev);
605 buf[3] = 0x3c;
606 buf[5] = dev->dev_attrib.is_nonrot ? 1 : 0;
607
608 return 0;
609}
610
611/* Thin Provisioning VPD */
612static sense_reason_t
613spc_emulate_evpd_b2(struct se_cmd *cmd, unsigned char *buf)
614{
615 struct se_device *dev = cmd->se_dev;
616
617 /*
618 * From spc3r22 section 6.5.4 Thin Provisioning VPD page:
619 *
620 * The PAGE LENGTH field is defined in SPC-4. If the DP bit is set to
621 * zero, then the page length shall be set to 0004h. If the DP bit
622 * is set to one, then the page length shall be set to the value
623 * defined in table 162.
624 */
625 buf[0] = dev->transport->get_device_type(dev);
626
627 /*
628 * Set Hardcoded length mentioned above for DP=0
629 */
630 put_unaligned_be16(0x0004, &buf[2]);
631
632 /*
633 * The THRESHOLD EXPONENT field indicates the threshold set size in
634 * LBAs as a power of 2 (i.e., the threshold set size is equal to
635 * 2(threshold exponent)).
636 *
637 * Note that this is currently set to 0x00 as mkp says it will be
638 * changing again. We can enable this once it has settled in T10
639 * and is actually used by Linux/SCSI ML code.
640 */
641 buf[4] = 0x00;
642
643 /*
644 * A TPU bit set to one indicates that the device server supports
645 * the UNMAP command (see 5.25). A TPU bit set to zero indicates
646 * that the device server does not support the UNMAP command.
647 */
648 if (dev->dev_attrib.emulate_tpu != 0)
649 buf[5] = 0x80;
650
651 /*
652 * A TPWS bit set to one indicates that the device server supports
653 * the use of the WRITE SAME (16) command (see 5.42) to unmap LBAs.
654 * A TPWS bit set to zero indicates that the device server does not
655 * support the use of the WRITE SAME (16) command to unmap LBAs.
656 */
657 if (dev->dev_attrib.emulate_tpws != 0)
658 buf[5] |= 0x40;
659
660 return 0;
661}
662
663/* Referrals VPD page */
664static sense_reason_t
665spc_emulate_evpd_b3(struct se_cmd *cmd, unsigned char *buf)
666{
667 struct se_device *dev = cmd->se_dev;
668
669 buf[0] = dev->transport->get_device_type(dev);
670 buf[3] = 0x0c;
671 put_unaligned_be32(dev->t10_alua.lba_map_segment_size, &buf[8]);
672 put_unaligned_be32(dev->t10_alua.lba_map_segment_size, &buf[12]);
673
674 return 0;
675}
676
677static sense_reason_t
678spc_emulate_evpd_00(struct se_cmd *cmd, unsigned char *buf);
679
680static struct {
681 uint8_t page;
682 sense_reason_t (*emulate)(struct se_cmd *, unsigned char *);
683} evpd_handlers[] = {
684 { .page = 0x00, .emulate = spc_emulate_evpd_00 },
685 { .page = 0x80, .emulate = spc_emulate_evpd_80 },
686 { .page = 0x83, .emulate = spc_emulate_evpd_83 },
687 { .page = 0x86, .emulate = spc_emulate_evpd_86 },
688 { .page = 0xb0, .emulate = spc_emulate_evpd_b0 },
689 { .page = 0xb1, .emulate = spc_emulate_evpd_b1 },
690 { .page = 0xb2, .emulate = spc_emulate_evpd_b2 },
691 { .page = 0xb3, .emulate = spc_emulate_evpd_b3 },
692};
693
694/* supported vital product data pages */
695static sense_reason_t
696spc_emulate_evpd_00(struct se_cmd *cmd, unsigned char *buf)
697{
698 int p;
699
700 /*
701 * Only report the INQUIRY EVPD=1 pages after a valid NAA
702 * Registered Extended LUN WWN has been set via ConfigFS
703 * during device creation/restart.
704 */
705 if (cmd->se_dev->dev_flags & DF_EMULATED_VPD_UNIT_SERIAL) {
706 buf[3] = ARRAY_SIZE(evpd_handlers);
707 for (p = 0; p < ARRAY_SIZE(evpd_handlers); ++p)
708 buf[p + 4] = evpd_handlers[p].page;
709 }
710
711 return 0;
712}
713
714static sense_reason_t
715spc_emulate_inquiry(struct se_cmd *cmd)
716{
717 struct se_device *dev = cmd->se_dev;
718 struct se_portal_group *tpg = cmd->se_lun->lun_sep->sep_tpg;
719 unsigned char *rbuf;
720 unsigned char *cdb = cmd->t_task_cdb;
721 unsigned char *buf;
722 sense_reason_t ret;
723 int p;
724
725 buf = kzalloc(SE_INQUIRY_BUF, GFP_KERNEL);
726 if (!buf) {
727 pr_err("Unable to allocate response buffer for INQUIRY\n");
728 return TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE;
729 }
730
731 if (dev == tpg->tpg_virt_lun0.lun_se_dev)
732 buf[0] = 0x3f; /* Not connected */
733 else
734 buf[0] = dev->transport->get_device_type(dev);
735
736 if (!(cdb[1] & 0x1)) {
737 if (cdb[2]) {
738 pr_err("INQUIRY with EVPD==0 but PAGE CODE=%02x\n",
739 cdb[2]);
740 ret = TCM_INVALID_CDB_FIELD;
741 goto out;
742 }
743
744 ret = spc_emulate_inquiry_std(cmd, buf);
745 goto out;
746 }
747
748 for (p = 0; p < ARRAY_SIZE(evpd_handlers); ++p) {
749 if (cdb[2] == evpd_handlers[p].page) {
750 buf[1] = cdb[2];
751 ret = evpd_handlers[p].emulate(cmd, buf);
752 goto out;
753 }
754 }
755
756 pr_err("Unknown VPD Code: 0x%02x\n", cdb[2]);
757 ret = TCM_INVALID_CDB_FIELD;
758
759out:
760 rbuf = transport_kmap_data_sg(cmd);
761 if (rbuf) {
762 memcpy(rbuf, buf, min_t(u32, SE_INQUIRY_BUF, cmd->data_length));
763 transport_kunmap_data_sg(cmd);
764 }
765 kfree(buf);
766
767 if (!ret)
768 target_complete_cmd(cmd, GOOD);
769 return ret;
770}
771
772static int spc_modesense_rwrecovery(struct se_cmd *cmd, u8 pc, u8 *p)
773{
774 p[0] = 0x01;
775 p[1] = 0x0a;
776
777 /* No changeable values for now */
778 if (pc == 1)
779 goto out;
780
781out:
782 return 12;
783}
784
785static int spc_modesense_control(struct se_cmd *cmd, u8 pc, u8 *p)
786{
787 struct se_device *dev = cmd->se_dev;
788 struct se_session *sess = cmd->se_sess;
789
790 p[0] = 0x0a;
791 p[1] = 0x0a;
792
793 /* No changeable values for now */
794 if (pc == 1)
795 goto out;
796
797 p[2] = 2;
798 /*
799 * From spc4r23, 7.4.7 Control mode page
800 *
801 * The QUEUE ALGORITHM MODIFIER field (see table 368) specifies
802 * restrictions on the algorithm used for reordering commands
803 * having the SIMPLE task attribute (see SAM-4).
804 *
805 * Table 368 -- QUEUE ALGORITHM MODIFIER field
806 * Code Description
807 * 0h Restricted reordering
808 * 1h Unrestricted reordering allowed
809 * 2h to 7h Reserved
810 * 8h to Fh Vendor specific
811 *
812 * A value of zero in the QUEUE ALGORITHM MODIFIER field specifies that
813 * the device server shall order the processing sequence of commands
814 * having the SIMPLE task attribute such that data integrity is maintained
815 * for that I_T nexus (i.e., if the transmission of new SCSI transport protocol
816 * requests is halted at any time, the final value of all data observable
817 * on the medium shall be the same as if all the commands had been processed
818 * with the ORDERED task attribute).
819 *
820 * A value of one in the QUEUE ALGORITHM MODIFIER field specifies that the
821 * device server may reorder the processing sequence of commands having the
822 * SIMPLE task attribute in any manner. Any data integrity exposures related to
823 * command sequence order shall be explicitly handled by the application client
824 * through the selection of appropriate ommands and task attributes.
825 */
826 p[3] = (dev->dev_attrib.emulate_rest_reord == 1) ? 0x00 : 0x10;
827 /*
828 * From spc4r17, section 7.4.6 Control mode Page
829 *
830 * Unit Attention interlocks control (UN_INTLCK_CTRL) to code 00b
831 *
832 * 00b: The logical unit shall clear any unit attention condition
833 * reported in the same I_T_L_Q nexus transaction as a CHECK CONDITION
834 * status and shall not establish a unit attention condition when a com-
835 * mand is completed with BUSY, TASK SET FULL, or RESERVATION CONFLICT
836 * status.
837 *
838 * 10b: The logical unit shall not clear any unit attention condition
839 * reported in the same I_T_L_Q nexus transaction as a CHECK CONDITION
840 * status and shall not establish a unit attention condition when
841 * a command is completed with BUSY, TASK SET FULL, or RESERVATION
842 * CONFLICT status.
843 *
844 * 11b a The logical unit shall not clear any unit attention condition
845 * reported in the same I_T_L_Q nexus transaction as a CHECK CONDITION
846 * status and shall establish a unit attention condition for the
847 * initiator port associated with the I_T nexus on which the BUSY,
848 * TASK SET FULL, or RESERVATION CONFLICT status is being returned.
849 * Depending on the status, the additional sense code shall be set to
850 * PREVIOUS BUSY STATUS, PREVIOUS TASK SET FULL STATUS, or PREVIOUS
851 * RESERVATION CONFLICT STATUS. Until it is cleared by a REQUEST SENSE
852 * command, a unit attention condition shall be established only once
853 * for a BUSY, TASK SET FULL, or RESERVATION CONFLICT status regardless
854 * to the number of commands completed with one of those status codes.
855 */
856 p[4] = (dev->dev_attrib.emulate_ua_intlck_ctrl == 2) ? 0x30 :
857 (dev->dev_attrib.emulate_ua_intlck_ctrl == 1) ? 0x20 : 0x00;
858 /*
859 * From spc4r17, section 7.4.6 Control mode Page
860 *
861 * Task Aborted Status (TAS) bit set to zero.
862 *
863 * A task aborted status (TAS) bit set to zero specifies that aborted
864 * tasks shall be terminated by the device server without any response
865 * to the application client. A TAS bit set to one specifies that tasks
866 * aborted by the actions of an I_T nexus other than the I_T nexus on
867 * which the command was received shall be completed with TASK ABORTED
868 * status (see SAM-4).
869 */
870 p[5] = (dev->dev_attrib.emulate_tas) ? 0x40 : 0x00;
871 /*
872 * From spc4r30, section 7.5.7 Control mode page
873 *
874 * Application Tag Owner (ATO) bit set to one.
875 *
876 * If the ATO bit is set to one the device server shall not modify the
877 * LOGICAL BLOCK APPLICATION TAG field and, depending on the protection
878 * type, shall not modify the contents of the LOGICAL BLOCK REFERENCE
879 * TAG field.
880 */
881 if (sess->sup_prot_ops & (TARGET_PROT_DIN_PASS | TARGET_PROT_DOUT_PASS)) {
882 if (dev->dev_attrib.pi_prot_type)
883 p[5] |= 0x80;
884 }
885
886 p[8] = 0xff;
887 p[9] = 0xff;
888 p[11] = 30;
889
890out:
891 return 12;
892}
893
894static int spc_modesense_caching(struct se_cmd *cmd, u8 pc, u8 *p)
895{
896 struct se_device *dev = cmd->se_dev;
897
898 p[0] = 0x08;
899 p[1] = 0x12;
900
901 /* No changeable values for now */
902 if (pc == 1)
903 goto out;
904
905 if (spc_check_dev_wce(dev))
906 p[2] = 0x04; /* Write Cache Enable */
907 p[12] = 0x20; /* Disabled Read Ahead */
908
909out:
910 return 20;
911}
912
913static int spc_modesense_informational_exceptions(struct se_cmd *cmd, u8 pc, unsigned char *p)
914{
915 p[0] = 0x1c;
916 p[1] = 0x0a;
917
918 /* No changeable values for now */
919 if (pc == 1)
920 goto out;
921
922out:
923 return 12;
924}
925
926static struct {
927 uint8_t page;
928 uint8_t subpage;
929 int (*emulate)(struct se_cmd *, u8, unsigned char *);
930} modesense_handlers[] = {
931 { .page = 0x01, .subpage = 0x00, .emulate = spc_modesense_rwrecovery },
932 { .page = 0x08, .subpage = 0x00, .emulate = spc_modesense_caching },
933 { .page = 0x0a, .subpage = 0x00, .emulate = spc_modesense_control },
934 { .page = 0x1c, .subpage = 0x00, .emulate = spc_modesense_informational_exceptions },
935};
936
937static void spc_modesense_write_protect(unsigned char *buf, int type)
938{
939 /*
940 * I believe that the WP bit (bit 7) in the mode header is the same for
941 * all device types..
942 */
943 switch (type) {
944 case TYPE_DISK:
945 case TYPE_TAPE:
946 default:
947 buf[0] |= 0x80; /* WP bit */
948 break;
949 }
950}
951
952static void spc_modesense_dpofua(unsigned char *buf, int type)
953{
954 switch (type) {
955 case TYPE_DISK:
956 buf[0] |= 0x10; /* DPOFUA bit */
957 break;
958 default:
959 break;
960 }
961}
962
963static int spc_modesense_blockdesc(unsigned char *buf, u64 blocks, u32 block_size)
964{
965 *buf++ = 8;
966 put_unaligned_be32(min(blocks, 0xffffffffull), buf);
967 buf += 4;
968 put_unaligned_be32(block_size, buf);
969 return 9;
970}
971
972static int spc_modesense_long_blockdesc(unsigned char *buf, u64 blocks, u32 block_size)
973{
974 if (blocks <= 0xffffffff)
975 return spc_modesense_blockdesc(buf + 3, blocks, block_size) + 3;
976
977 *buf++ = 1; /* LONGLBA */
978 buf += 2;
979 *buf++ = 16;
980 put_unaligned_be64(blocks, buf);
981 buf += 12;
982 put_unaligned_be32(block_size, buf);
983
984 return 17;
985}
986
987static sense_reason_t spc_emulate_modesense(struct se_cmd *cmd)
988{
989 struct se_device *dev = cmd->se_dev;
990 char *cdb = cmd->t_task_cdb;
991 unsigned char buf[SE_MODE_PAGE_BUF], *rbuf;
992 int type = dev->transport->get_device_type(dev);
993 int ten = (cmd->t_task_cdb[0] == MODE_SENSE_10);
994 bool dbd = !!(cdb[1] & 0x08);
995 bool llba = ten ? !!(cdb[1] & 0x10) : false;
996 u8 pc = cdb[2] >> 6;
997 u8 page = cdb[2] & 0x3f;
998 u8 subpage = cdb[3];
999 int length = 0;
1000 int ret;
1001 int i;
1002
1003 memset(buf, 0, SE_MODE_PAGE_BUF);
1004
1005 /*
1006 * Skip over MODE DATA LENGTH + MEDIUM TYPE fields to byte 3 for
1007 * MODE_SENSE_10 and byte 2 for MODE_SENSE (6).
1008 */
1009 length = ten ? 3 : 2;
1010
1011 /* DEVICE-SPECIFIC PARAMETER */
1012 if ((cmd->se_lun->lun_access & TRANSPORT_LUNFLAGS_READ_ONLY) ||
1013 (cmd->se_deve &&
1014 (cmd->se_deve->lun_flags & TRANSPORT_LUNFLAGS_READ_ONLY)))
1015 spc_modesense_write_protect(&buf[length], type);
1016
1017 if ((spc_check_dev_wce(dev)) &&
1018 (dev->dev_attrib.emulate_fua_write > 0))
1019 spc_modesense_dpofua(&buf[length], type);
1020
1021 ++length;
1022
1023 /* BLOCK DESCRIPTOR */
1024
1025 /*
1026 * For now we only include a block descriptor for disk (SBC)
1027 * devices; other command sets use a slightly different format.
1028 */
1029 if (!dbd && type == TYPE_DISK) {
1030 u64 blocks = dev->transport->get_blocks(dev);
1031 u32 block_size = dev->dev_attrib.block_size;
1032
1033 if (ten) {
1034 if (llba) {
1035 length += spc_modesense_long_blockdesc(&buf[length],
1036 blocks, block_size);
1037 } else {
1038 length += 3;
1039 length += spc_modesense_blockdesc(&buf[length],
1040 blocks, block_size);
1041 }
1042 } else {
1043 length += spc_modesense_blockdesc(&buf[length], blocks,
1044 block_size);
1045 }
1046 } else {
1047 if (ten)
1048 length += 4;
1049 else
1050 length += 1;
1051 }
1052
1053 if (page == 0x3f) {
1054 if (subpage != 0x00 && subpage != 0xff) {
1055 pr_warn("MODE_SENSE: Invalid subpage code: 0x%02x\n", subpage);
1056 return TCM_INVALID_CDB_FIELD;
1057 }
1058
1059 for (i = 0; i < ARRAY_SIZE(modesense_handlers); ++i) {
1060 /*
1061 * Tricky way to say all subpage 00h for
1062 * subpage==0, all subpages for subpage==0xff
1063 * (and we just checked above that those are
1064 * the only two possibilities).
1065 */
1066 if ((modesense_handlers[i].subpage & ~subpage) == 0) {
1067 ret = modesense_handlers[i].emulate(cmd, pc, &buf[length]);
1068 if (!ten && length + ret >= 255)
1069 break;
1070 length += ret;
1071 }
1072 }
1073
1074 goto set_length;
1075 }
1076
1077 for (i = 0; i < ARRAY_SIZE(modesense_handlers); ++i)
1078 if (modesense_handlers[i].page == page &&
1079 modesense_handlers[i].subpage == subpage) {
1080 length += modesense_handlers[i].emulate(cmd, pc, &buf[length]);
1081 goto set_length;
1082 }
1083
1084 /*
1085 * We don't intend to implement:
1086 * - obsolete page 03h "format parameters" (checked by Solaris)
1087 */
1088 if (page != 0x03)
1089 pr_err("MODE SENSE: unimplemented page/subpage: 0x%02x/0x%02x\n",
1090 page, subpage);
1091
1092 return TCM_UNKNOWN_MODE_PAGE;
1093
1094set_length:
1095 if (ten)
1096 put_unaligned_be16(length - 2, buf);
1097 else
1098 buf[0] = length - 1;
1099
1100 rbuf = transport_kmap_data_sg(cmd);
1101 if (rbuf) {
1102 memcpy(rbuf, buf, min_t(u32, SE_MODE_PAGE_BUF, cmd->data_length));
1103 transport_kunmap_data_sg(cmd);
1104 }
1105
1106 target_complete_cmd(cmd, GOOD);
1107 return 0;
1108}
1109
1110static sense_reason_t spc_emulate_modeselect(struct se_cmd *cmd)
1111{
1112 char *cdb = cmd->t_task_cdb;
1113 bool ten = cdb[0] == MODE_SELECT_10;
1114 int off = ten ? 8 : 4;
1115 bool pf = !!(cdb[1] & 0x10);
1116 u8 page, subpage;
1117 unsigned char *buf;
1118 unsigned char tbuf[SE_MODE_PAGE_BUF];
1119 int length;
1120 int ret = 0;
1121 int i;
1122
1123 if (!cmd->data_length) {
1124 target_complete_cmd(cmd, GOOD);
1125 return 0;
1126 }
1127
1128 if (cmd->data_length < off + 2)
1129 return TCM_PARAMETER_LIST_LENGTH_ERROR;
1130
1131 buf = transport_kmap_data_sg(cmd);
1132 if (!buf)
1133 return TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE;
1134
1135 if (!pf) {
1136 ret = TCM_INVALID_CDB_FIELD;
1137 goto out;
1138 }
1139
1140 page = buf[off] & 0x3f;
1141 subpage = buf[off] & 0x40 ? buf[off + 1] : 0;
1142
1143 for (i = 0; i < ARRAY_SIZE(modesense_handlers); ++i)
1144 if (modesense_handlers[i].page == page &&
1145 modesense_handlers[i].subpage == subpage) {
1146 memset(tbuf, 0, SE_MODE_PAGE_BUF);
1147 length = modesense_handlers[i].emulate(cmd, 0, tbuf);
1148 goto check_contents;
1149 }
1150
1151 ret = TCM_UNKNOWN_MODE_PAGE;
1152 goto out;
1153
1154check_contents:
1155 if (cmd->data_length < off + length) {
1156 ret = TCM_PARAMETER_LIST_LENGTH_ERROR;
1157 goto out;
1158 }
1159
1160 if (memcmp(buf + off, tbuf, length))
1161 ret = TCM_INVALID_PARAMETER_LIST;
1162
1163out:
1164 transport_kunmap_data_sg(cmd);
1165
1166 if (!ret)
1167 target_complete_cmd(cmd, GOOD);
1168 return ret;
1169}
1170
1171static sense_reason_t spc_emulate_request_sense(struct se_cmd *cmd)
1172{
1173 unsigned char *cdb = cmd->t_task_cdb;
1174 unsigned char *rbuf;
1175 u8 ua_asc = 0, ua_ascq = 0;
1176 unsigned char buf[SE_SENSE_BUF];
1177
1178 memset(buf, 0, SE_SENSE_BUF);
1179
1180 if (cdb[1] & 0x01) {
1181 pr_err("REQUEST_SENSE description emulation not"
1182 " supported\n");
1183 return TCM_INVALID_CDB_FIELD;
1184 }
1185
1186 rbuf = transport_kmap_data_sg(cmd);
1187 if (!rbuf)
1188 return TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE;
1189
1190 if (!core_scsi3_ua_clear_for_request_sense(cmd, &ua_asc, &ua_ascq)) {
1191 /*
1192 * CURRENT ERROR, UNIT ATTENTION
1193 */
1194 buf[0] = 0x70;
1195 buf[SPC_SENSE_KEY_OFFSET] = UNIT_ATTENTION;
1196
1197 /*
1198 * The Additional Sense Code (ASC) from the UNIT ATTENTION
1199 */
1200 buf[SPC_ASC_KEY_OFFSET] = ua_asc;
1201 buf[SPC_ASCQ_KEY_OFFSET] = ua_ascq;
1202 buf[7] = 0x0A;
1203 } else {
1204 /*
1205 * CURRENT ERROR, NO SENSE
1206 */
1207 buf[0] = 0x70;
1208 buf[SPC_SENSE_KEY_OFFSET] = NO_SENSE;
1209
1210 /*
1211 * NO ADDITIONAL SENSE INFORMATION
1212 */
1213 buf[SPC_ASC_KEY_OFFSET] = 0x00;
1214 buf[7] = 0x0A;
1215 }
1216
1217 memcpy(rbuf, buf, min_t(u32, sizeof(buf), cmd->data_length));
1218 transport_kunmap_data_sg(cmd);
1219
1220 target_complete_cmd(cmd, GOOD);
1221 return 0;
1222}
1223
1224sense_reason_t spc_emulate_report_luns(struct se_cmd *cmd)
1225{
1226 struct se_dev_entry *deve;
1227 struct se_session *sess = cmd->se_sess;
1228 unsigned char *buf;
1229 u32 lun_count = 0, offset = 8, i;
1230
1231 if (cmd->data_length < 16) {
1232 pr_warn("REPORT LUNS allocation length %u too small\n",
1233 cmd->data_length);
1234 return TCM_INVALID_CDB_FIELD;
1235 }
1236
1237 buf = transport_kmap_data_sg(cmd);
1238 if (!buf)
1239 return TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE;
1240
1241 /*
1242 * If no struct se_session pointer is present, this struct se_cmd is
1243 * coming via a target_core_mod PASSTHROUGH op, and not through
1244 * a $FABRIC_MOD. In that case, report LUN=0 only.
1245 */
1246 if (!sess) {
1247 int_to_scsilun(0, (struct scsi_lun *)&buf[offset]);
1248 lun_count = 1;
1249 goto done;
1250 }
1251
1252 spin_lock_irq(&sess->se_node_acl->device_list_lock);
1253 for (i = 0; i < TRANSPORT_MAX_LUNS_PER_TPG; i++) {
1254 deve = sess->se_node_acl->device_list[i];
1255 if (!(deve->lun_flags & TRANSPORT_LUNFLAGS_INITIATOR_ACCESS))
1256 continue;
1257 /*
1258 * We determine the correct LUN LIST LENGTH even once we
1259 * have reached the initial allocation length.
1260 * See SPC2-R20 7.19.
1261 */
1262 lun_count++;
1263 if ((offset + 8) > cmd->data_length)
1264 continue;
1265
1266 int_to_scsilun(deve->mapped_lun, (struct scsi_lun *)&buf[offset]);
1267 offset += 8;
1268 }
1269 spin_unlock_irq(&sess->se_node_acl->device_list_lock);
1270
1271 /*
1272 * See SPC3 r07, page 159.
1273 */
1274done:
1275 lun_count *= 8;
1276 buf[0] = ((lun_count >> 24) & 0xff);
1277 buf[1] = ((lun_count >> 16) & 0xff);
1278 buf[2] = ((lun_count >> 8) & 0xff);
1279 buf[3] = (lun_count & 0xff);
1280 transport_kunmap_data_sg(cmd);
1281
1282 target_complete_cmd(cmd, GOOD);
1283 return 0;
1284}
1285EXPORT_SYMBOL(spc_emulate_report_luns);
1286
1287static sense_reason_t
1288spc_emulate_testunitready(struct se_cmd *cmd)
1289{
1290 target_complete_cmd(cmd, GOOD);
1291 return 0;
1292}
1293
1294sense_reason_t
1295spc_parse_cdb(struct se_cmd *cmd, unsigned int *size)
1296{
1297 struct se_device *dev = cmd->se_dev;
1298 unsigned char *cdb = cmd->t_task_cdb;
1299
1300 switch (cdb[0]) {
1301 case MODE_SELECT:
1302 *size = cdb[4];
1303 cmd->execute_cmd = spc_emulate_modeselect;
1304 break;
1305 case MODE_SELECT_10:
1306 *size = (cdb[7] << 8) + cdb[8];
1307 cmd->execute_cmd = spc_emulate_modeselect;
1308 break;
1309 case MODE_SENSE:
1310 *size = cdb[4];
1311 cmd->execute_cmd = spc_emulate_modesense;
1312 break;
1313 case MODE_SENSE_10:
1314 *size = (cdb[7] << 8) + cdb[8];
1315 cmd->execute_cmd = spc_emulate_modesense;
1316 break;
1317 case LOG_SELECT:
1318 case LOG_SENSE:
1319 *size = (cdb[7] << 8) + cdb[8];
1320 break;
1321 case PERSISTENT_RESERVE_IN:
1322 *size = (cdb[7] << 8) + cdb[8];
1323 cmd->execute_cmd = target_scsi3_emulate_pr_in;
1324 break;
1325 case PERSISTENT_RESERVE_OUT:
1326 *size = (cdb[7] << 8) + cdb[8];
1327 cmd->execute_cmd = target_scsi3_emulate_pr_out;
1328 break;
1329 case RELEASE:
1330 case RELEASE_10:
1331 if (cdb[0] == RELEASE_10)
1332 *size = (cdb[7] << 8) | cdb[8];
1333 else
1334 *size = cmd->data_length;
1335
1336 cmd->execute_cmd = target_scsi2_reservation_release;
1337 break;
1338 case RESERVE:
1339 case RESERVE_10:
1340 /*
1341 * The SPC-2 RESERVE does not contain a size in the SCSI CDB.
1342 * Assume the passthrough or $FABRIC_MOD will tell us about it.
1343 */
1344 if (cdb[0] == RESERVE_10)
1345 *size = (cdb[7] << 8) | cdb[8];
1346 else
1347 *size = cmd->data_length;
1348
1349 cmd->execute_cmd = target_scsi2_reservation_reserve;
1350 break;
1351 case REQUEST_SENSE:
1352 *size = cdb[4];
1353 cmd->execute_cmd = spc_emulate_request_sense;
1354 break;
1355 case INQUIRY:
1356 *size = (cdb[3] << 8) + cdb[4];
1357
1358 /*
1359 * Do implicit HEAD_OF_QUEUE processing for INQUIRY.
1360 * See spc4r17 section 5.3
1361 */
1362 cmd->sam_task_attr = MSG_HEAD_TAG;
1363 cmd->execute_cmd = spc_emulate_inquiry;
1364 break;
1365 case SECURITY_PROTOCOL_IN:
1366 case SECURITY_PROTOCOL_OUT:
1367 *size = (cdb[6] << 24) | (cdb[7] << 16) | (cdb[8] << 8) | cdb[9];
1368 break;
1369 case EXTENDED_COPY:
1370 *size = get_unaligned_be32(&cdb[10]);
1371 cmd->execute_cmd = target_do_xcopy;
1372 break;
1373 case RECEIVE_COPY_RESULTS:
1374 *size = get_unaligned_be32(&cdb[10]);
1375 cmd->execute_cmd = target_do_receive_copy_results;
1376 break;
1377 case READ_ATTRIBUTE:
1378 case WRITE_ATTRIBUTE:
1379 *size = (cdb[10] << 24) | (cdb[11] << 16) |
1380 (cdb[12] << 8) | cdb[13];
1381 break;
1382 case RECEIVE_DIAGNOSTIC:
1383 case SEND_DIAGNOSTIC:
1384 *size = (cdb[3] << 8) | cdb[4];
1385 break;
1386 case WRITE_BUFFER:
1387 *size = (cdb[6] << 16) + (cdb[7] << 8) + cdb[8];
1388 break;
1389 case REPORT_LUNS:
1390 cmd->execute_cmd = spc_emulate_report_luns;
1391 *size = (cdb[6] << 24) | (cdb[7] << 16) | (cdb[8] << 8) | cdb[9];
1392 /*
1393 * Do implicit HEAD_OF_QUEUE processing for REPORT_LUNS
1394 * See spc4r17 section 5.3
1395 */
1396 cmd->sam_task_attr = MSG_HEAD_TAG;
1397 break;
1398 case TEST_UNIT_READY:
1399 cmd->execute_cmd = spc_emulate_testunitready;
1400 *size = 0;
1401 break;
1402 case MAINTENANCE_IN:
1403 if (dev->transport->get_device_type(dev) != TYPE_ROM) {
1404 /*
1405 * MAINTENANCE_IN from SCC-2
1406 * Check for emulated MI_REPORT_TARGET_PGS
1407 */
1408 if ((cdb[1] & 0x1f) == MI_REPORT_TARGET_PGS) {
1409 cmd->execute_cmd =
1410 target_emulate_report_target_port_groups;
1411 }
1412 *size = get_unaligned_be32(&cdb[6]);
1413 } else {
1414 /*
1415 * GPCMD_SEND_KEY from multi media commands
1416 */
1417 *size = get_unaligned_be16(&cdb[8]);
1418 }
1419 break;
1420 case MAINTENANCE_OUT:
1421 if (dev->transport->get_device_type(dev) != TYPE_ROM) {
1422 /*
1423 * MAINTENANCE_OUT from SCC-2
1424 * Check for emulated MO_SET_TARGET_PGS.
1425 */
1426 if (cdb[1] == MO_SET_TARGET_PGS) {
1427 cmd->execute_cmd =
1428 target_emulate_set_target_port_groups;
1429 }
1430 *size = get_unaligned_be32(&cdb[6]);
1431 } else {
1432 /*
1433 * GPCMD_SEND_KEY from multi media commands
1434 */
1435 *size = get_unaligned_be16(&cdb[8]);
1436 }
1437 break;
1438 default:
1439 pr_warn("TARGET_CORE[%s]: Unsupported SCSI Opcode"
1440 " 0x%02x, sending CHECK_CONDITION.\n",
1441 cmd->se_tfo->get_fabric_name(), cdb[0]);
1442 return TCM_UNSUPPORTED_SCSI_OPCODE;
1443 }
1444
1445 return 0;
1446}
1447EXPORT_SYMBOL(spc_parse_cdb);