projects / deliverable / linux.git / blob
? search:
summary | shortlog | log | commit | commitdiff | tree
blame | history | raw | HEAD
Merge branch 'for-next' of git://git.kernel.org/pub/scm/linux/kernel/git/nab/target...
[deliverable/linux.git] / drivers / target / target_core_spc.c
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_proto.h>
28 #include <scsi/scsi_common.h>
29 #include <scsi/scsi_tcq.h>
30
31 #include <target/target_core_base.h>
32 #include <target/target_core_backend.h>
33 #include <target/target_core_fabric.h>
34
35 #include "target_core_internal.h"
36 #include "target_core_alua.h"
37 #include "target_core_pr.h"
38 #include "target_core_ua.h"
39 #include "target_core_xcopy.h"
40
41 static void spc_fill_alua_data(struct se_lun *lun, unsigned char *buf)
42 {
43 struct t10_alua_tg_pt_gp *tg_pt_gp;
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 spin_lock(&lun->lun_tg_pt_gp_lock);
57 tg_pt_gp = lun->lun_tg_pt_gp;
58 if (tg_pt_gp)
59 buf[5] |= tg_pt_gp->tg_pt_gp_alua_access_type;
60 spin_unlock(&lun->lun_tg_pt_gp_lock);
61 }
62
63 sense_reason_t
64 spc_emulate_inquiry_std(struct se_cmd *cmd, unsigned char *buf)
65 {
66 struct se_lun *lun = cmd->se_lun;
67 struct se_device *dev = cmd->se_dev;
68 struct se_session *sess = cmd->se_sess;
69
70 /* Set RMB (removable media) for tape devices */
71 if (dev->transport->get_device_type(dev) == TYPE_TAPE)
72 buf[1] = 0x80;
73
74 buf[2] = 0x05; /* SPC-3 */
75
76 /*
77 * NORMACA and HISUP = 0, RESPONSE DATA FORMAT = 2
78 *
79 * SPC4 says:
80 * A RESPONSE DATA FORMAT field set to 2h indicates that the
81 * standard INQUIRY data is in the format defined in this
82 * standard. Response data format values less than 2h are
83 * obsolete. Response data format values greater than 2h are
84 * reserved.
85 */
86 buf[3] = 2;
87
88 /*
89 * Enable SCCS and TPGS fields for Emulated ALUA
90 */
91 spc_fill_alua_data(lun, buf);
92
93 /*
94 * Set Third-Party Copy (3PC) bit to indicate support for EXTENDED_COPY
95 */
96 if (dev->dev_attrib.emulate_3pc)
97 buf[5] |= 0x8;
98 /*
99 * Set Protection (PROTECT) bit when DIF has been enabled on the
100 * device, and the fabric supports VERIFY + PASS. Also report
101 * PROTECT=1 if sess_prot_type has been configured to allow T10-PI
102 * to unprotected devices.
103 */
104 if (sess->sup_prot_ops & (TARGET_PROT_DIN_PASS | TARGET_PROT_DOUT_PASS)) {
105 if (dev->dev_attrib.pi_prot_type || cmd->se_sess->sess_prot_type)
106 buf[5] |= 0x1;
107 }
108
109 buf[7] = 0x2; /* CmdQue=1 */
110
111 memcpy(&buf[8], "LIO-ORG ", 8);
112 memset(&buf[16], 0x20, 16);
113 memcpy(&buf[16], dev->t10_wwn.model,
114 min_t(size_t, strlen(dev->t10_wwn.model), 16));
115 memcpy(&buf[32], dev->t10_wwn.revision,
116 min_t(size_t, strlen(dev->t10_wwn.revision), 4));
117 buf[4] = 31; /* Set additional length to 31 */
118
119 return 0;
120 }
121 EXPORT_SYMBOL(spc_emulate_inquiry_std);
122
123 /* unit serial number */
124 static sense_reason_t
125 spc_emulate_evpd_80(struct se_cmd *cmd, unsigned char *buf)
126 {
127 struct se_device *dev = cmd->se_dev;
128 u16 len;
129
130 if (dev->dev_flags & DF_EMULATED_VPD_UNIT_SERIAL) {
131 len = sprintf(&buf[4], "%s", dev->t10_wwn.unit_serial);
132 len++; /* Extra Byte for NULL Terminator */
133 buf[3] = len;
134 }
135 return 0;
136 }
137
138 void spc_parse_naa_6h_vendor_specific(struct se_device *dev,
139 unsigned char *buf)
140 {
141 unsigned char *p = &dev->t10_wwn.unit_serial[0];
142 int cnt;
143 bool next = true;
144
145 /*
146 * Generate up to 36 bits of VENDOR SPECIFIC IDENTIFIER starting on
147 * byte 3 bit 3-0 for NAA IEEE Registered Extended DESIGNATOR field
148 * format, followed by 64 bits of VENDOR SPECIFIC IDENTIFIER EXTENSION
149 * to complete the payload. These are based from VPD=0x80 PRODUCT SERIAL
150 * NUMBER set via vpd_unit_serial in target_core_configfs.c to ensure
151 * per device uniqeness.
152 */
153 for (cnt = 0; *p && cnt < 13; p++) {
154 int val = hex_to_bin(*p);
155
156 if (val < 0)
157 continue;
158
159 if (next) {
160 next = false;
161 buf[cnt++] |= val;
162 } else {
163 next = true;
164 buf[cnt] = val << 4;
165 }
166 }
167 }
168
169 /*
170 * Device identification VPD, for a complete list of
171 * DESIGNATOR TYPEs see spc4r17 Table 459.
172 */
173 sense_reason_t
174 spc_emulate_evpd_83(struct se_cmd *cmd, unsigned char *buf)
175 {
176 struct se_device *dev = cmd->se_dev;
177 struct se_lun *lun = cmd->se_lun;
178 struct se_portal_group *tpg = NULL;
179 struct t10_alua_lu_gp_member *lu_gp_mem;
180 struct t10_alua_tg_pt_gp *tg_pt_gp;
181 unsigned char *prod = &dev->t10_wwn.model[0];
182 u32 prod_len;
183 u32 unit_serial_len, off = 0;
184 u16 len = 0, id_len;
185
186 off = 4;
187
188 /*
189 * NAA IEEE Registered Extended Assigned designator format, see
190 * spc4r17 section 7.7.3.6.5
191 *
192 * We depend upon a target_core_mod/ConfigFS provided
193 * /sys/kernel/config/target/core/$HBA/$DEV/wwn/vpd_unit_serial
194 * value in order to return the NAA id.
195 */
196 if (!(dev->dev_flags & DF_EMULATED_VPD_UNIT_SERIAL))
197 goto check_t10_vend_desc;
198
199 /* CODE SET == Binary */
200 buf[off++] = 0x1;
201
202 /* Set ASSOCIATION == addressed logical unit: 0)b */
203 buf[off] = 0x00;
204
205 /* Identifier/Designator type == NAA identifier */
206 buf[off++] |= 0x3;
207 off++;
208
209 /* Identifier/Designator length */
210 buf[off++] = 0x10;
211
212 /*
213 * Start NAA IEEE Registered Extended Identifier/Designator
214 */
215 buf[off++] = (0x6 << 4);
216
217 /*
218 * Use OpenFabrics IEEE Company ID: 00 14 05
219 */
220 buf[off++] = 0x01;
221 buf[off++] = 0x40;
222 buf[off] = (0x5 << 4);
223
224 /*
225 * Return ConfigFS Unit Serial Number information for
226 * VENDOR_SPECIFIC_IDENTIFIER and
227 * VENDOR_SPECIFIC_IDENTIFIER_EXTENTION
228 */
229 spc_parse_naa_6h_vendor_specific(dev, &buf[off]);
230
231 len = 20;
232 off = (len + 4);
233
234 check_t10_vend_desc:
235 /*
236 * T10 Vendor Identifier Page, see spc4r17 section 7.7.3.4
237 */
238 id_len = 8; /* For Vendor field */
239 prod_len = 4; /* For VPD Header */
240 prod_len += 8; /* For Vendor field */
241 prod_len += strlen(prod);
242 prod_len++; /* For : */
243
244 if (dev->dev_flags & DF_EMULATED_VPD_UNIT_SERIAL) {
245 unit_serial_len = strlen(&dev->t10_wwn.unit_serial[0]);
246 unit_serial_len++; /* For NULL Terminator */
247
248 id_len += sprintf(&buf[off+12], "%s:%s", prod,
249 &dev->t10_wwn.unit_serial[0]);
250 }
251 buf[off] = 0x2; /* ASCII */
252 buf[off+1] = 0x1; /* T10 Vendor ID */
253 buf[off+2] = 0x0;
254 memcpy(&buf[off+4], "LIO-ORG", 8);
255 /* Extra Byte for NULL Terminator */
256 id_len++;
257 /* Identifier Length */
258 buf[off+3] = id_len;
259 /* Header size for Designation descriptor */
260 len += (id_len + 4);
261 off += (id_len + 4);
262
263 if (1) {
264 struct t10_alua_lu_gp *lu_gp;
265 u32 padding, scsi_name_len, scsi_target_len;
266 u16 lu_gp_id = 0;
267 u16 tg_pt_gp_id = 0;
268 u16 tpgt;
269
270 tpg = lun->lun_tpg;
271 /*
272 * Relative target port identifer, see spc4r17
273 * section 7.7.3.7
274 *
275 * Get the PROTOCOL IDENTIFIER as defined by spc4r17
276 * section 7.5.1 Table 362
277 */
278 buf[off] = tpg->proto_id << 4;
279 buf[off++] |= 0x1; /* CODE SET == Binary */
280 buf[off] = 0x80; /* Set PIV=1 */
281 /* Set ASSOCIATION == target port: 01b */
282 buf[off] |= 0x10;
283 /* DESIGNATOR TYPE == Relative target port identifer */
284 buf[off++] |= 0x4;
285 off++; /* Skip over Reserved */
286 buf[off++] = 4; /* DESIGNATOR LENGTH */
287 /* Skip over Obsolete field in RTPI payload
288 * in Table 472 */
289 off += 2;
290 buf[off++] = ((lun->lun_rtpi >> 8) & 0xff);
291 buf[off++] = (lun->lun_rtpi & 0xff);
292 len += 8; /* Header size + Designation descriptor */
293 /*
294 * Target port group identifier, see spc4r17
295 * section 7.7.3.8
296 *
297 * Get the PROTOCOL IDENTIFIER as defined by spc4r17
298 * section 7.5.1 Table 362
299 */
300 spin_lock(&lun->lun_tg_pt_gp_lock);
301 tg_pt_gp = lun->lun_tg_pt_gp;
302 if (!tg_pt_gp) {
303 spin_unlock(&lun->lun_tg_pt_gp_lock);
304 goto check_lu_gp;
305 }
306 tg_pt_gp_id = tg_pt_gp->tg_pt_gp_id;
307 spin_unlock(&lun->lun_tg_pt_gp_lock);
308
309 buf[off] = tpg->proto_id << 4;
310 buf[off++] |= 0x1; /* CODE SET == Binary */
311 buf[off] = 0x80; /* Set PIV=1 */
312 /* Set ASSOCIATION == target port: 01b */
313 buf[off] |= 0x10;
314 /* DESIGNATOR TYPE == Target port group identifier */
315 buf[off++] |= 0x5;
316 off++; /* Skip over Reserved */
317 buf[off++] = 4; /* DESIGNATOR LENGTH */
318 off += 2; /* Skip over Reserved Field */
319 buf[off++] = ((tg_pt_gp_id >> 8) & 0xff);
320 buf[off++] = (tg_pt_gp_id & 0xff);
321 len += 8; /* Header size + Designation descriptor */
322 /*
323 * Logical Unit Group identifier, see spc4r17
324 * section 7.7.3.8
325 */
326 check_lu_gp:
327 lu_gp_mem = dev->dev_alua_lu_gp_mem;
328 if (!lu_gp_mem)
329 goto check_scsi_name;
330
331 spin_lock(&lu_gp_mem->lu_gp_mem_lock);
332 lu_gp = lu_gp_mem->lu_gp;
333 if (!lu_gp) {
334 spin_unlock(&lu_gp_mem->lu_gp_mem_lock);
335 goto check_scsi_name;
336 }
337 lu_gp_id = lu_gp->lu_gp_id;
338 spin_unlock(&lu_gp_mem->lu_gp_mem_lock);
339
340 buf[off++] |= 0x1; /* CODE SET == Binary */
341 /* DESIGNATOR TYPE == Logical Unit Group identifier */
342 buf[off++] |= 0x6;
343 off++; /* Skip over Reserved */
344 buf[off++] = 4; /* DESIGNATOR LENGTH */
345 off += 2; /* Skip over Reserved Field */
346 buf[off++] = ((lu_gp_id >> 8) & 0xff);
347 buf[off++] = (lu_gp_id & 0xff);
348 len += 8; /* Header size + Designation descriptor */
349 /*
350 * SCSI name string designator, see spc4r17
351 * section 7.7.3.11
352 *
353 * Get the PROTOCOL IDENTIFIER as defined by spc4r17
354 * section 7.5.1 Table 362
355 */
356 check_scsi_name:
357 buf[off] = tpg->proto_id << 4;
358 buf[off++] |= 0x3; /* CODE SET == UTF-8 */
359 buf[off] = 0x80; /* Set PIV=1 */
360 /* Set ASSOCIATION == target port: 01b */
361 buf[off] |= 0x10;
362 /* DESIGNATOR TYPE == SCSI name string */
363 buf[off++] |= 0x8;
364 off += 2; /* Skip over Reserved and length */
365 /*
366 * SCSI name string identifer containing, $FABRIC_MOD
367 * dependent information. For LIO-Target and iSCSI
368 * Target Port, this means "<iSCSI name>,t,0x<TPGT> in
369 * UTF-8 encoding.
370 */
371 tpgt = tpg->se_tpg_tfo->tpg_get_tag(tpg);
372 scsi_name_len = sprintf(&buf[off], "%s,t,0x%04x",
373 tpg->se_tpg_tfo->tpg_get_wwn(tpg), tpgt);
374 scsi_name_len += 1 /* Include NULL terminator */;
375 /*
376 * The null-terminated, null-padded (see 4.4.2) SCSI
377 * NAME STRING field contains a UTF-8 format string.
378 * The number of bytes in the SCSI NAME STRING field
379 * (i.e., the value in the DESIGNATOR LENGTH field)
380 * shall be no larger than 256 and shall be a multiple
381 * of four.
382 */
383 padding = ((-scsi_name_len) & 3);
384 if (padding)
385 scsi_name_len += padding;
386 if (scsi_name_len > 256)
387 scsi_name_len = 256;
388
389 buf[off-1] = scsi_name_len;
390 off += scsi_name_len;
391 /* Header size + Designation descriptor */
392 len += (scsi_name_len + 4);
393
394 /*
395 * Target device designator
396 */
397 buf[off] = tpg->proto_id << 4;
398 buf[off++] |= 0x3; /* CODE SET == UTF-8 */
399 buf[off] = 0x80; /* Set PIV=1 */
400 /* Set ASSOCIATION == target device: 10b */
401 buf[off] |= 0x20;
402 /* DESIGNATOR TYPE == SCSI name string */
403 buf[off++] |= 0x8;
404 off += 2; /* Skip over Reserved and length */
405 /*
406 * SCSI name string identifer containing, $FABRIC_MOD
407 * dependent information. For LIO-Target and iSCSI
408 * Target Port, this means "<iSCSI name>" in
409 * UTF-8 encoding.
410 */
411 scsi_target_len = sprintf(&buf[off], "%s",
412 tpg->se_tpg_tfo->tpg_get_wwn(tpg));
413 scsi_target_len += 1 /* Include NULL terminator */;
414 /*
415 * The null-terminated, null-padded (see 4.4.2) SCSI
416 * NAME STRING field contains a UTF-8 format string.
417 * The number of bytes in the SCSI NAME STRING field
418 * (i.e., the value in the DESIGNATOR LENGTH field)
419 * shall be no larger than 256 and shall be a multiple
420 * of four.
421 */
422 padding = ((-scsi_target_len) & 3);
423 if (padding)
424 scsi_target_len += padding;
425 if (scsi_target_len > 256)
426 scsi_target_len = 256;
427
428 buf[off-1] = scsi_target_len;
429 off += scsi_target_len;
430
431 /* Header size + Designation descriptor */
432 len += (scsi_target_len + 4);
433 }
434 buf[2] = ((len >> 8) & 0xff);
435 buf[3] = (len & 0xff); /* Page Length for VPD 0x83 */
436 return 0;
437 }
438 EXPORT_SYMBOL(spc_emulate_evpd_83);
439
440 /* Extended INQUIRY Data VPD Page */
441 static sense_reason_t
442 spc_emulate_evpd_86(struct se_cmd *cmd, unsigned char *buf)
443 {
444 struct se_device *dev = cmd->se_dev;
445 struct se_session *sess = cmd->se_sess;
446
447 buf[3] = 0x3c;
448 /*
449 * Set GRD_CHK + REF_CHK for TYPE1 protection, or GRD_CHK
450 * only for TYPE3 protection.
451 */
452 if (sess->sup_prot_ops & (TARGET_PROT_DIN_PASS | TARGET_PROT_DOUT_PASS)) {
453 if (dev->dev_attrib.pi_prot_type == TARGET_DIF_TYPE1_PROT ||
454 cmd->se_sess->sess_prot_type == TARGET_DIF_TYPE1_PROT)
455 buf[4] = 0x5;
456 else if (dev->dev_attrib.pi_prot_type == TARGET_DIF_TYPE3_PROT ||
457 cmd->se_sess->sess_prot_type == TARGET_DIF_TYPE3_PROT)
458 buf[4] = 0x4;
459 }
460
461 /* Set HEADSUP, ORDSUP, SIMPSUP */
462 buf[5] = 0x07;
463
464 /* If WriteCache emulation is enabled, set V_SUP */
465 if (target_check_wce(dev))
466 buf[6] = 0x01;
467 /* If an LBA map is present set R_SUP */
468 spin_lock(&cmd->se_dev->t10_alua.lba_map_lock);
469 if (!list_empty(&dev->t10_alua.lba_map_list))
470 buf[8] = 0x10;
471 spin_unlock(&cmd->se_dev->t10_alua.lba_map_lock);
472 return 0;
473 }
474
475 /* Block Limits VPD page */
476 static sense_reason_t
477 spc_emulate_evpd_b0(struct se_cmd *cmd, unsigned char *buf)
478 {
479 struct se_device *dev = cmd->se_dev;
480 int have_tp = 0;
481 int opt, min;
482
483 /*
484 * Following spc3r22 section 6.5.3 Block Limits VPD page, when
485 * emulate_tpu=1 or emulate_tpws=1 we will be expect a
486 * different page length for Thin Provisioning.
487 */
488 if (dev->dev_attrib.emulate_tpu || dev->dev_attrib.emulate_tpws)
489 have_tp = 1;
490
491 buf[0] = dev->transport->get_device_type(dev);
492 buf[3] = have_tp ? 0x3c : 0x10;
493
494 /* Set WSNZ to 1 */
495 buf[4] = 0x01;
496 /*
497 * Set MAXIMUM COMPARE AND WRITE LENGTH
498 */
499 if (dev->dev_attrib.emulate_caw)
500 buf[5] = 0x01;
501
502 /*
503 * Set OPTIMAL TRANSFER LENGTH GRANULARITY
504 */
505 if (dev->transport->get_io_min && (min = dev->transport->get_io_min(dev)))
506 put_unaligned_be16(min / dev->dev_attrib.block_size, &buf[6]);
507 else
508 put_unaligned_be16(1, &buf[6]);
509
510 /*
511 * Set MAXIMUM TRANSFER LENGTH
512 */
513 put_unaligned_be32(dev->dev_attrib.hw_max_sectors, &buf[8]);
514
515 /*
516 * Set OPTIMAL TRANSFER LENGTH
517 */
518 if (dev->transport->get_io_opt && (opt = dev->transport->get_io_opt(dev)))
519 put_unaligned_be32(opt / dev->dev_attrib.block_size, &buf[12]);
520 else
521 put_unaligned_be32(dev->dev_attrib.optimal_sectors, &buf[12]);
522
523 /*
524 * Exit now if we don't support TP.
525 */
526 if (!have_tp)
527 goto max_write_same;
528
529 /*
530 * Set MAXIMUM UNMAP LBA COUNT
531 */
532 put_unaligned_be32(dev->dev_attrib.max_unmap_lba_count, &buf[20]);
533
534 /*
535 * Set MAXIMUM UNMAP BLOCK DESCRIPTOR COUNT
536 */
537 put_unaligned_be32(dev->dev_attrib.max_unmap_block_desc_count,
538 &buf[24]);
539
540 /*
541 * Set OPTIMAL UNMAP GRANULARITY
542 */
543 put_unaligned_be32(dev->dev_attrib.unmap_granularity, &buf[28]);
544
545 /*
546 * UNMAP GRANULARITY ALIGNMENT
547 */
548 put_unaligned_be32(dev->dev_attrib.unmap_granularity_alignment,
549 &buf[32]);
550 if (dev->dev_attrib.unmap_granularity_alignment != 0)
551 buf[32] |= 0x80; /* Set the UGAVALID bit */
552
553 /*
554 * MAXIMUM WRITE SAME LENGTH
555 */
556 max_write_same:
557 put_unaligned_be64(dev->dev_attrib.max_write_same_len, &buf[36]);
558
559 return 0;
560 }
561
562 /* Block Device Characteristics VPD page */
563 static sense_reason_t
564 spc_emulate_evpd_b1(struct se_cmd *cmd, unsigned char *buf)
565 {
566 struct se_device *dev = cmd->se_dev;
567
568 buf[0] = dev->transport->get_device_type(dev);
569 buf[3] = 0x3c;
570 buf[5] = dev->dev_attrib.is_nonrot ? 1 : 0;
571
572 return 0;
573 }
574
575 /* Thin Provisioning VPD */
576 static sense_reason_t
577 spc_emulate_evpd_b2(struct se_cmd *cmd, unsigned char *buf)
578 {
579 struct se_device *dev = cmd->se_dev;
580
581 /*
582 * From spc3r22 section 6.5.4 Thin Provisioning VPD page:
583 *
584 * The PAGE LENGTH field is defined in SPC-4. If the DP bit is set to
585 * zero, then the page length shall be set to 0004h. If the DP bit
586 * is set to one, then the page length shall be set to the value
587 * defined in table 162.
588 */
589 buf[0] = dev->transport->get_device_type(dev);
590
591 /*
592 * Set Hardcoded length mentioned above for DP=0
593 */
594 put_unaligned_be16(0x0004, &buf[2]);
595
596 /*
597 * The THRESHOLD EXPONENT field indicates the threshold set size in
598 * LBAs as a power of 2 (i.e., the threshold set size is equal to
599 * 2(threshold exponent)).
600 *
601 * Note that this is currently set to 0x00 as mkp says it will be
602 * changing again. We can enable this once it has settled in T10
603 * and is actually used by Linux/SCSI ML code.
604 */
605 buf[4] = 0x00;
606
607 /*
608 * A TPU bit set to one indicates that the device server supports
609 * the UNMAP command (see 5.25). A TPU bit set to zero indicates
610 * that the device server does not support the UNMAP command.
611 */
612 if (dev->dev_attrib.emulate_tpu != 0)
613 buf[5] = 0x80;
614
615 /*
616 * A TPWS bit set to one indicates that the device server supports
617 * the use of the WRITE SAME (16) command (see 5.42) to unmap LBAs.
618 * A TPWS bit set to zero indicates that the device server does not
619 * support the use of the WRITE SAME (16) command to unmap LBAs.
620 */
621 if (dev->dev_attrib.emulate_tpws != 0)
622 buf[5] |= 0x40 | 0x20;
623
624 return 0;
625 }
626
627 /* Referrals VPD page */
628 static sense_reason_t
629 spc_emulate_evpd_b3(struct se_cmd *cmd, unsigned char *buf)
630 {
631 struct se_device *dev = cmd->se_dev;
632
633 buf[0] = dev->transport->get_device_type(dev);
634 buf[3] = 0x0c;
635 put_unaligned_be32(dev->t10_alua.lba_map_segment_size, &buf[8]);
636 put_unaligned_be32(dev->t10_alua.lba_map_segment_multiplier, &buf[12]);
637
638 return 0;
639 }
640
641 static sense_reason_t
642 spc_emulate_evpd_00(struct se_cmd *cmd, unsigned char *buf);
643
644 static struct {
645 uint8_t page;
646 sense_reason_t (*emulate)(struct se_cmd *, unsigned char *);
647 } evpd_handlers[] = {
648 { .page = 0x00, .emulate = spc_emulate_evpd_00 },
649 { .page = 0x80, .emulate = spc_emulate_evpd_80 },
650 { .page = 0x83, .emulate = spc_emulate_evpd_83 },
651 { .page = 0x86, .emulate = spc_emulate_evpd_86 },
652 { .page = 0xb0, .emulate = spc_emulate_evpd_b0 },
653 { .page = 0xb1, .emulate = spc_emulate_evpd_b1 },
654 { .page = 0xb2, .emulate = spc_emulate_evpd_b2 },
655 { .page = 0xb3, .emulate = spc_emulate_evpd_b3 },
656 };
657
658 /* supported vital product data pages */
659 static sense_reason_t
660 spc_emulate_evpd_00(struct se_cmd *cmd, unsigned char *buf)
661 {
662 int p;
663
664 /*
665 * Only report the INQUIRY EVPD=1 pages after a valid NAA
666 * Registered Extended LUN WWN has been set via ConfigFS
667 * during device creation/restart.
668 */
669 if (cmd->se_dev->dev_flags & DF_EMULATED_VPD_UNIT_SERIAL) {
670 buf[3] = ARRAY_SIZE(evpd_handlers);
671 for (p = 0; p < ARRAY_SIZE(evpd_handlers); ++p)
672 buf[p + 4] = evpd_handlers[p].page;
673 }
674
675 return 0;
676 }
677
678 static sense_reason_t
679 spc_emulate_inquiry(struct se_cmd *cmd)
680 {
681 struct se_device *dev = cmd->se_dev;
682 struct se_portal_group *tpg = cmd->se_lun->lun_tpg;
683 unsigned char *rbuf;
684 unsigned char *cdb = cmd->t_task_cdb;
685 unsigned char *buf;
686 sense_reason_t ret;
687 int p;
688 int len = 0;
689
690 buf = kzalloc(SE_INQUIRY_BUF, GFP_KERNEL);
691 if (!buf) {
692 pr_err("Unable to allocate response buffer for INQUIRY\n");
693 return TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE;
694 }
695
696 if (dev == rcu_access_pointer(tpg->tpg_virt_lun0->lun_se_dev))
697 buf[0] = 0x3f; /* Not connected */
698 else
699 buf[0] = dev->transport->get_device_type(dev);
700
701 if (!(cdb[1] & 0x1)) {
702 if (cdb[2]) {
703 pr_err("INQUIRY with EVPD==0 but PAGE CODE=%02x\n",
704 cdb[2]);
705 ret = TCM_INVALID_CDB_FIELD;
706 goto out;
707 }
708
709 ret = spc_emulate_inquiry_std(cmd, buf);
710 len = buf[4] + 5;
711 goto out;
712 }
713
714 for (p = 0; p < ARRAY_SIZE(evpd_handlers); ++p) {
715 if (cdb[2] == evpd_handlers[p].page) {
716 buf[1] = cdb[2];
717 ret = evpd_handlers[p].emulate(cmd, buf);
718 len = get_unaligned_be16(&buf[2]) + 4;
719 goto out;
720 }
721 }
722
723 pr_err("Unknown VPD Code: 0x%02x\n", cdb[2]);
724 ret = TCM_INVALID_CDB_FIELD;
725
726 out:
727 rbuf = transport_kmap_data_sg(cmd);
728 if (rbuf) {
729 memcpy(rbuf, buf, min_t(u32, SE_INQUIRY_BUF, cmd->data_length));
730 transport_kunmap_data_sg(cmd);
731 }
732 kfree(buf);
733
734 if (!ret)
735 target_complete_cmd_with_length(cmd, GOOD, len);
736 return ret;
737 }
738
739 static int spc_modesense_rwrecovery(struct se_cmd *cmd, u8 pc, u8 *p)
740 {
741 p[0] = 0x01;
742 p[1] = 0x0a;
743
744 /* No changeable values for now */
745 if (pc == 1)
746 goto out;
747
748 out:
749 return 12;
750 }
751
752 static int spc_modesense_control(struct se_cmd *cmd, u8 pc, u8 *p)
753 {
754 struct se_device *dev = cmd->se_dev;
755 struct se_session *sess = cmd->se_sess;
756
757 p[0] = 0x0a;
758 p[1] = 0x0a;
759
760 /* No changeable values for now */
761 if (pc == 1)
762 goto out;
763
764 p[2] = 2;
765 /*
766 * From spc4r23, 7.4.7 Control mode page
767 *
768 * The QUEUE ALGORITHM MODIFIER field (see table 368) specifies
769 * restrictions on the algorithm used for reordering commands
770 * having the SIMPLE task attribute (see SAM-4).
771 *
772 * Table 368 -- QUEUE ALGORITHM MODIFIER field
773 * Code Description
774 * 0h Restricted reordering
775 * 1h Unrestricted reordering allowed
776 * 2h to 7h Reserved
777 * 8h to Fh Vendor specific
778 *
779 * A value of zero in the QUEUE ALGORITHM MODIFIER field specifies that
780 * the device server shall order the processing sequence of commands
781 * having the SIMPLE task attribute such that data integrity is maintained
782 * for that I_T nexus (i.e., if the transmission of new SCSI transport protocol
783 * requests is halted at any time, the final value of all data observable
784 * on the medium shall be the same as if all the commands had been processed
785 * with the ORDERED task attribute).
786 *
787 * A value of one in the QUEUE ALGORITHM MODIFIER field specifies that the
788 * device server may reorder the processing sequence of commands having the
789 * SIMPLE task attribute in any manner. Any data integrity exposures related to
790 * command sequence order shall be explicitly handled by the application client
791 * through the selection of appropriate ommands and task attributes.
792 */
793 p[3] = (dev->dev_attrib.emulate_rest_reord == 1) ? 0x00 : 0x10;
794 /*
795 * From spc4r17, section 7.4.6 Control mode Page
796 *
797 * Unit Attention interlocks control (UN_INTLCK_CTRL) to code 00b
798 *
799 * 00b: The logical unit shall clear any unit attention condition
800 * reported in the same I_T_L_Q nexus transaction as a CHECK CONDITION
801 * status and shall not establish a unit attention condition when a com-
802 * mand is completed with BUSY, TASK SET FULL, or RESERVATION CONFLICT
803 * status.
804 *
805 * 10b: The logical unit shall not clear any unit attention condition
806 * reported in the same I_T_L_Q nexus transaction as a CHECK CONDITION
807 * status and shall not establish a unit attention condition when
808 * a command is completed with BUSY, TASK SET FULL, or RESERVATION
809 * CONFLICT status.
810 *
811 * 11b a The logical unit shall not clear any unit attention condition
812 * reported in the same I_T_L_Q nexus transaction as a CHECK CONDITION
813 * status and shall establish a unit attention condition for the
814 * initiator port associated with the I_T nexus on which the BUSY,
815 * TASK SET FULL, or RESERVATION CONFLICT status is being returned.
816 * Depending on the status, the additional sense code shall be set to
817 * PREVIOUS BUSY STATUS, PREVIOUS TASK SET FULL STATUS, or PREVIOUS
818 * RESERVATION CONFLICT STATUS. Until it is cleared by a REQUEST SENSE
819 * command, a unit attention condition shall be established only once
820 * for a BUSY, TASK SET FULL, or RESERVATION CONFLICT status regardless
821 * to the number of commands completed with one of those status codes.
822 */
823 p[4] = (dev->dev_attrib.emulate_ua_intlck_ctrl == 2) ? 0x30 :
824 (dev->dev_attrib.emulate_ua_intlck_ctrl == 1) ? 0x20 : 0x00;
825 /*
826 * From spc4r17, section 7.4.6 Control mode Page
827 *
828 * Task Aborted Status (TAS) bit set to zero.
829 *
830 * A task aborted status (TAS) bit set to zero specifies that aborted
831 * tasks shall be terminated by the device server without any response
832 * to the application client. A TAS bit set to one specifies that tasks
833 * aborted by the actions of an I_T nexus other than the I_T nexus on
834 * which the command was received shall be completed with TASK ABORTED
835 * status (see SAM-4).
836 */
837 p[5] = (dev->dev_attrib.emulate_tas) ? 0x40 : 0x00;
838 /*
839 * From spc4r30, section 7.5.7 Control mode page
840 *
841 * Application Tag Owner (ATO) bit set to one.
842 *
843 * If the ATO bit is set to one the device server shall not modify the
844 * LOGICAL BLOCK APPLICATION TAG field and, depending on the protection
845 * type, shall not modify the contents of the LOGICAL BLOCK REFERENCE
846 * TAG field.
847 */
848 if (sess->sup_prot_ops & (TARGET_PROT_DIN_PASS | TARGET_PROT_DOUT_PASS)) {
849 if (dev->dev_attrib.pi_prot_type || sess->sess_prot_type)
850 p[5] |= 0x80;
851 }
852
853 p[8] = 0xff;
854 p[9] = 0xff;
855 p[11] = 30;
856
857 out:
858 return 12;
859 }
860
861 static int spc_modesense_caching(struct se_cmd *cmd, u8 pc, u8 *p)
862 {
863 struct se_device *dev = cmd->se_dev;
864
865 p[0] = 0x08;
866 p[1] = 0x12;
867
868 /* No changeable values for now */
869 if (pc == 1)
870 goto out;
871
872 if (target_check_wce(dev))
873 p[2] = 0x04; /* Write Cache Enable */
874 p[12] = 0x20; /* Disabled Read Ahead */
875
876 out:
877 return 20;
878 }
879
880 static int spc_modesense_informational_exceptions(struct se_cmd *cmd, u8 pc, unsigned char *p)
881 {
882 p[0] = 0x1c;
883 p[1] = 0x0a;
884
885 /* No changeable values for now */
886 if (pc == 1)
887 goto out;
888
889 out:
890 return 12;
891 }
892
893 static struct {
894 uint8_t page;
895 uint8_t subpage;
896 int (*emulate)(struct se_cmd *, u8, unsigned char *);
897 } modesense_handlers[] = {
898 { .page = 0x01, .subpage = 0x00, .emulate = spc_modesense_rwrecovery },
899 { .page = 0x08, .subpage = 0x00, .emulate = spc_modesense_caching },
900 { .page = 0x0a, .subpage = 0x00, .emulate = spc_modesense_control },
901 { .page = 0x1c, .subpage = 0x00, .emulate = spc_modesense_informational_exceptions },
902 };
903
904 static void spc_modesense_write_protect(unsigned char *buf, int type)
905 {
906 /*
907 * I believe that the WP bit (bit 7) in the mode header is the same for
908 * all device types..
909 */
910 switch (type) {
911 case TYPE_DISK:
912 case TYPE_TAPE:
913 default:
914 buf[0] |= 0x80; /* WP bit */
915 break;
916 }
917 }
918
919 static void spc_modesense_dpofua(unsigned char *buf, int type)
920 {
921 switch (type) {
922 case TYPE_DISK:
923 buf[0] |= 0x10; /* DPOFUA bit */
924 break;
925 default:
926 break;
927 }
928 }
929
930 static int spc_modesense_blockdesc(unsigned char *buf, u64 blocks, u32 block_size)
931 {
932 *buf++ = 8;
933 put_unaligned_be32(min(blocks, 0xffffffffull), buf);
934 buf += 4;
935 put_unaligned_be32(block_size, buf);
936 return 9;
937 }
938
939 static int spc_modesense_long_blockdesc(unsigned char *buf, u64 blocks, u32 block_size)
940 {
941 if (blocks <= 0xffffffff)
942 return spc_modesense_blockdesc(buf + 3, blocks, block_size) + 3;
943
944 *buf++ = 1; /* LONGLBA */
945 buf += 2;
946 *buf++ = 16;
947 put_unaligned_be64(blocks, buf);
948 buf += 12;
949 put_unaligned_be32(block_size, buf);
950
951 return 17;
952 }
953
954 static sense_reason_t spc_emulate_modesense(struct se_cmd *cmd)
955 {
956 struct se_device *dev = cmd->se_dev;
957 char *cdb = cmd->t_task_cdb;
958 unsigned char buf[SE_MODE_PAGE_BUF], *rbuf;
959 int type = dev->transport->get_device_type(dev);
960 int ten = (cmd->t_task_cdb[0] == MODE_SENSE_10);
961 bool dbd = !!(cdb[1] & 0x08);
962 bool llba = ten ? !!(cdb[1] & 0x10) : false;
963 u8 pc = cdb[2] >> 6;
964 u8 page = cdb[2] & 0x3f;
965 u8 subpage = cdb[3];
966 int length = 0;
967 int ret;
968 int i;
969 bool read_only = target_lun_is_rdonly(cmd);;
970
971 memset(buf, 0, SE_MODE_PAGE_BUF);
972
973 /*
974 * Skip over MODE DATA LENGTH + MEDIUM TYPE fields to byte 3 for
975 * MODE_SENSE_10 and byte 2 for MODE_SENSE (6).
976 */
977 length = ten ? 3 : 2;
978
979 /* DEVICE-SPECIFIC PARAMETER */
980 if ((cmd->se_lun->lun_access & TRANSPORT_LUNFLAGS_READ_ONLY) || read_only)
981 spc_modesense_write_protect(&buf[length], type);
982
983 /*
984 * SBC only allows us to enable FUA and DPO together. Fortunately
985 * DPO is explicitly specified as a hint, so a noop is a perfectly
986 * valid implementation.
987 */
988 if (target_check_fua(dev))
989 spc_modesense_dpofua(&buf[length], type);
990
991 ++length;
992
993 /* BLOCK DESCRIPTOR */
994
995 /*
996 * For now we only include a block descriptor for disk (SBC)
997 * devices; other command sets use a slightly different format.
998 */
999 if (!dbd && type == TYPE_DISK) {
1000 u64 blocks = dev->transport->get_blocks(dev);
1001 u32 block_size = dev->dev_attrib.block_size;
1002
1003 if (ten) {
1004 if (llba) {
1005 length += spc_modesense_long_blockdesc(&buf[length],
1006 blocks, block_size);
1007 } else {
1008 length += 3;
1009 length += spc_modesense_blockdesc(&buf[length],
1010 blocks, block_size);
1011 }
1012 } else {
1013 length += spc_modesense_blockdesc(&buf[length], blocks,
1014 block_size);
1015 }
1016 } else {
1017 if (ten)
1018 length += 4;
1019 else
1020 length += 1;
1021 }
1022
1023 if (page == 0x3f) {
1024 if (subpage != 0x00 && subpage != 0xff) {
1025 pr_warn("MODE_SENSE: Invalid subpage code: 0x%02x\n", subpage);
1026 return TCM_INVALID_CDB_FIELD;
1027 }
1028
1029 for (i = 0; i < ARRAY_SIZE(modesense_handlers); ++i) {
1030 /*
1031 * Tricky way to say all subpage 00h for
1032 * subpage==0, all subpages for subpage==0xff
1033 * (and we just checked above that those are
1034 * the only two possibilities).
1035 */
1036 if ((modesense_handlers[i].subpage & ~subpage) == 0) {
1037 ret = modesense_handlers[i].emulate(cmd, pc, &buf[length]);
1038 if (!ten && length + ret >= 255)
1039 break;
1040 length += ret;
1041 }
1042 }
1043
1044 goto set_length;
1045 }
1046
1047 for (i = 0; i < ARRAY_SIZE(modesense_handlers); ++i)
1048 if (modesense_handlers[i].page == page &&
1049 modesense_handlers[i].subpage == subpage) {
1050 length += modesense_handlers[i].emulate(cmd, pc, &buf[length]);
1051 goto set_length;
1052 }
1053
1054 /*
1055 * We don't intend to implement:
1056 * - obsolete page 03h "format parameters" (checked by Solaris)
1057 */
1058 if (page != 0x03)
1059 pr_err("MODE SENSE: unimplemented page/subpage: 0x%02x/0x%02x\n",
1060 page, subpage);
1061
1062 return TCM_UNKNOWN_MODE_PAGE;
1063
1064 set_length:
1065 if (ten)
1066 put_unaligned_be16(length - 2, buf);
1067 else
1068 buf[0] = length - 1;
1069
1070 rbuf = transport_kmap_data_sg(cmd);
1071 if (rbuf) {
1072 memcpy(rbuf, buf, min_t(u32, SE_MODE_PAGE_BUF, cmd->data_length));
1073 transport_kunmap_data_sg(cmd);
1074 }
1075
1076 target_complete_cmd_with_length(cmd, GOOD, length);
1077 return 0;
1078 }
1079
1080 static sense_reason_t spc_emulate_modeselect(struct se_cmd *cmd)
1081 {
1082 char *cdb = cmd->t_task_cdb;
1083 bool ten = cdb[0] == MODE_SELECT_10;
1084 int off = ten ? 8 : 4;
1085 bool pf = !!(cdb[1] & 0x10);
1086 u8 page, subpage;
1087 unsigned char *buf;
1088 unsigned char tbuf[SE_MODE_PAGE_BUF];
1089 int length;
1090 sense_reason_t ret = 0;
1091 int i;
1092
1093 if (!cmd->data_length) {
1094 target_complete_cmd(cmd, GOOD);
1095 return 0;
1096 }
1097
1098 if (cmd->data_length < off + 2)
1099 return TCM_PARAMETER_LIST_LENGTH_ERROR;
1100
1101 buf = transport_kmap_data_sg(cmd);
1102 if (!buf)
1103 return TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE;
1104
1105 if (!pf) {
1106 ret = TCM_INVALID_CDB_FIELD;
1107 goto out;
1108 }
1109
1110 page = buf[off] & 0x3f;
1111 subpage = buf[off] & 0x40 ? buf[off + 1] : 0;
1112
1113 for (i = 0; i < ARRAY_SIZE(modesense_handlers); ++i)
1114 if (modesense_handlers[i].page == page &&
1115 modesense_handlers[i].subpage == subpage) {
1116 memset(tbuf, 0, SE_MODE_PAGE_BUF);
1117 length = modesense_handlers[i].emulate(cmd, 0, tbuf);
1118 goto check_contents;
1119 }
1120
1121 ret = TCM_UNKNOWN_MODE_PAGE;
1122 goto out;
1123
1124 check_contents:
1125 if (cmd->data_length < off + length) {
1126 ret = TCM_PARAMETER_LIST_LENGTH_ERROR;
1127 goto out;
1128 }
1129
1130 if (memcmp(buf + off, tbuf, length))
1131 ret = TCM_INVALID_PARAMETER_LIST;
1132
1133 out:
1134 transport_kunmap_data_sg(cmd);
1135
1136 if (!ret)
1137 target_complete_cmd(cmd, GOOD);
1138 return ret;
1139 }
1140
1141 static sense_reason_t spc_emulate_request_sense(struct se_cmd *cmd)
1142 {
1143 unsigned char *cdb = cmd->t_task_cdb;
1144 unsigned char *rbuf;
1145 u8 ua_asc = 0, ua_ascq = 0;
1146 unsigned char buf[SE_SENSE_BUF];
1147
1148 memset(buf, 0, SE_SENSE_BUF);
1149
1150 if (cdb[1] & 0x01) {
1151 pr_err("REQUEST_SENSE description emulation not"
1152 " supported\n");
1153 return TCM_INVALID_CDB_FIELD;
1154 }
1155
1156 rbuf = transport_kmap_data_sg(cmd);
1157 if (!rbuf)
1158 return TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE;
1159
1160 if (!core_scsi3_ua_clear_for_request_sense(cmd, &ua_asc, &ua_ascq)) {
1161 /*
1162 * CURRENT ERROR, UNIT ATTENTION
1163 */
1164 buf[0] = 0x70;
1165 buf[SPC_SENSE_KEY_OFFSET] = UNIT_ATTENTION;
1166
1167 /*
1168 * The Additional Sense Code (ASC) from the UNIT ATTENTION
1169 */
1170 buf[SPC_ASC_KEY_OFFSET] = ua_asc;
1171 buf[SPC_ASCQ_KEY_OFFSET] = ua_ascq;
1172 buf[7] = 0x0A;
1173 } else {
1174 /*
1175 * CURRENT ERROR, NO SENSE
1176 */
1177 buf[0] = 0x70;
1178 buf[SPC_SENSE_KEY_OFFSET] = NO_SENSE;
1179
1180 /*
1181 * NO ADDITIONAL SENSE INFORMATION
1182 */
1183 buf[SPC_ASC_KEY_OFFSET] = 0x00;
1184 buf[7] = 0x0A;
1185 }
1186
1187 memcpy(rbuf, buf, min_t(u32, sizeof(buf), cmd->data_length));
1188 transport_kunmap_data_sg(cmd);
1189
1190 target_complete_cmd(cmd, GOOD);
1191 return 0;
1192 }
1193
1194 sense_reason_t spc_emulate_report_luns(struct se_cmd *cmd)
1195 {
1196 struct se_dev_entry *deve;
1197 struct se_session *sess = cmd->se_sess;
1198 struct se_node_acl *nacl;
1199 unsigned char *buf;
1200 u32 lun_count = 0, offset = 8;
1201
1202 if (cmd->data_length < 16) {
1203 pr_warn("REPORT LUNS allocation length %u too small\n",
1204 cmd->data_length);
1205 return TCM_INVALID_CDB_FIELD;
1206 }
1207
1208 buf = transport_kmap_data_sg(cmd);
1209 if (!buf)
1210 return TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE;
1211
1212 /*
1213 * If no struct se_session pointer is present, this struct se_cmd is
1214 * coming via a target_core_mod PASSTHROUGH op, and not through
1215 * a $FABRIC_MOD. In that case, report LUN=0 only.
1216 */
1217 if (!sess) {
1218 int_to_scsilun(0, (struct scsi_lun *)&buf[offset]);
1219 lun_count = 1;
1220 goto done;
1221 }
1222 nacl = sess->se_node_acl;
1223
1224 rcu_read_lock();
1225 hlist_for_each_entry_rcu(deve, &nacl->lun_entry_hlist, link) {
1226 /*
1227 * We determine the correct LUN LIST LENGTH even once we
1228 * have reached the initial allocation length.
1229 * See SPC2-R20 7.19.
1230 */
1231 lun_count++;
1232 if ((offset + 8) > cmd->data_length)
1233 continue;
1234
1235 int_to_scsilun(deve->mapped_lun, (struct scsi_lun *)&buf[offset]);
1236 offset += 8;
1237 }
1238 rcu_read_unlock();
1239
1240 /*
1241 * See SPC3 r07, page 159.
1242 */
1243 done:
1244 lun_count *= 8;
1245 buf[0] = ((lun_count >> 24) & 0xff);
1246 buf[1] = ((lun_count >> 16) & 0xff);
1247 buf[2] = ((lun_count >> 8) & 0xff);
1248 buf[3] = (lun_count & 0xff);
1249 transport_kunmap_data_sg(cmd);
1250
1251 target_complete_cmd_with_length(cmd, GOOD, 8 + lun_count * 8);
1252 return 0;
1253 }
1254 EXPORT_SYMBOL(spc_emulate_report_luns);
1255
1256 static sense_reason_t
1257 spc_emulate_testunitready(struct se_cmd *cmd)
1258 {
1259 target_complete_cmd(cmd, GOOD);
1260 return 0;
1261 }
1262
1263 sense_reason_t
1264 spc_parse_cdb(struct se_cmd *cmd, unsigned int *size)
1265 {
1266 struct se_device *dev = cmd->se_dev;
1267 unsigned char *cdb = cmd->t_task_cdb;
1268
1269 switch (cdb[0]) {
1270 case MODE_SELECT:
1271 *size = cdb[4];
1272 cmd->execute_cmd = spc_emulate_modeselect;
1273 break;
1274 case MODE_SELECT_10:
1275 *size = (cdb[7] << 8) + cdb[8];
1276 cmd->execute_cmd = spc_emulate_modeselect;
1277 break;
1278 case MODE_SENSE:
1279 *size = cdb[4];
1280 cmd->execute_cmd = spc_emulate_modesense;
1281 break;
1282 case MODE_SENSE_10:
1283 *size = (cdb[7] << 8) + cdb[8];
1284 cmd->execute_cmd = spc_emulate_modesense;
1285 break;
1286 case LOG_SELECT:
1287 case LOG_SENSE:
1288 *size = (cdb[7] << 8) + cdb[8];
1289 break;
1290 case PERSISTENT_RESERVE_IN:
1291 *size = (cdb[7] << 8) + cdb[8];
1292 cmd->execute_cmd = target_scsi3_emulate_pr_in;
1293 break;
1294 case PERSISTENT_RESERVE_OUT:
1295 *size = (cdb[7] << 8) + cdb[8];
1296 cmd->execute_cmd = target_scsi3_emulate_pr_out;
1297 break;
1298 case RELEASE:
1299 case RELEASE_10:
1300 if (cdb[0] == RELEASE_10)
1301 *size = (cdb[7] << 8) | cdb[8];
1302 else
1303 *size = cmd->data_length;
1304
1305 cmd->execute_cmd = target_scsi2_reservation_release;
1306 break;
1307 case RESERVE:
1308 case RESERVE_10:
1309 /*
1310 * The SPC-2 RESERVE does not contain a size in the SCSI CDB.
1311 * Assume the passthrough or $FABRIC_MOD will tell us about it.
1312 */
1313 if (cdb[0] == RESERVE_10)
1314 *size = (cdb[7] << 8) | cdb[8];
1315 else
1316 *size = cmd->data_length;
1317
1318 cmd->execute_cmd = target_scsi2_reservation_reserve;
1319 break;
1320 case REQUEST_SENSE:
1321 *size = cdb[4];
1322 cmd->execute_cmd = spc_emulate_request_sense;
1323 break;
1324 case INQUIRY:
1325 *size = (cdb[3] << 8) + cdb[4];
1326
1327 /*
1328 * Do implicit HEAD_OF_QUEUE processing for INQUIRY.
1329 * See spc4r17 section 5.3
1330 */
1331 cmd->sam_task_attr = TCM_HEAD_TAG;
1332 cmd->execute_cmd = spc_emulate_inquiry;
1333 break;
1334 case SECURITY_PROTOCOL_IN:
1335 case SECURITY_PROTOCOL_OUT:
1336 *size = (cdb[6] << 24) | (cdb[7] << 16) | (cdb[8] << 8) | cdb[9];
1337 break;
1338 case EXTENDED_COPY:
1339 *size = get_unaligned_be32(&cdb[10]);
1340 cmd->execute_cmd = target_do_xcopy;
1341 break;
1342 case RECEIVE_COPY_RESULTS:
1343 *size = get_unaligned_be32(&cdb[10]);
1344 cmd->execute_cmd = target_do_receive_copy_results;
1345 break;
1346 case READ_ATTRIBUTE:
1347 case WRITE_ATTRIBUTE:
1348 *size = (cdb[10] << 24) | (cdb[11] << 16) |
1349 (cdb[12] << 8) | cdb[13];
1350 break;
1351 case RECEIVE_DIAGNOSTIC:
1352 case SEND_DIAGNOSTIC:
1353 *size = (cdb[3] << 8) | cdb[4];
1354 break;
1355 case WRITE_BUFFER:
1356 *size = (cdb[6] << 16) + (cdb[7] << 8) + cdb[8];
1357 break;
1358 case REPORT_LUNS:
1359 cmd->execute_cmd = spc_emulate_report_luns;
1360 *size = (cdb[6] << 24) | (cdb[7] << 16) | (cdb[8] << 8) | cdb[9];
1361 /*
1362 * Do implicit HEAD_OF_QUEUE processing for REPORT_LUNS
1363 * See spc4r17 section 5.3
1364 */
1365 cmd->sam_task_attr = TCM_HEAD_TAG;
1366 break;
1367 case TEST_UNIT_READY:
1368 cmd->execute_cmd = spc_emulate_testunitready;
1369 *size = 0;
1370 break;
1371 case MAINTENANCE_IN:
1372 if (dev->transport->get_device_type(dev) != TYPE_ROM) {
1373 /*
1374 * MAINTENANCE_IN from SCC-2
1375 * Check for emulated MI_REPORT_TARGET_PGS
1376 */
1377 if ((cdb[1] & 0x1f) == MI_REPORT_TARGET_PGS) {
1378 cmd->execute_cmd =
1379 target_emulate_report_target_port_groups;
1380 }
1381 *size = get_unaligned_be32(&cdb[6]);
1382 } else {
1383 /*
1384 * GPCMD_SEND_KEY from multi media commands
1385 */
1386 *size = get_unaligned_be16(&cdb[8]);
1387 }
1388 break;
1389 case MAINTENANCE_OUT:
1390 if (dev->transport->get_device_type(dev) != TYPE_ROM) {
1391 /*
1392 * MAINTENANCE_OUT from SCC-2
1393 * Check for emulated MO_SET_TARGET_PGS.
1394 */
1395 if (cdb[1] == MO_SET_TARGET_PGS) {
1396 cmd->execute_cmd =
1397 target_emulate_set_target_port_groups;
1398 }
1399 *size = get_unaligned_be32(&cdb[6]);
1400 } else {
1401 /*
1402 * GPCMD_SEND_KEY from multi media commands
1403 */
1404 *size = get_unaligned_be16(&cdb[8]);
1405 }
1406 break;
1407 default:
1408 pr_warn("TARGET_CORE[%s]: Unsupported SCSI Opcode"
1409 " 0x%02x, sending CHECK_CONDITION.\n",
1410 cmd->se_tfo->get_fabric_name(), cdb[0]);
1411 return TCM_UNSUPPORTED_SCSI_OPCODE;
1412 }
1413
1414 return 0;
1415 }
1416 EXPORT_SYMBOL(spc_parse_cdb);
Linux kernel - Deliverables
This page took 0.071385 seconds and 5 git commands to generate.