2 * CDB emulation for non-READ/WRITE commands.
4 * Copyright (c) 2002, 2003, 2004, 2005 PyX Technologies, Inc.
5 * Copyright (c) 2005, 2006, 2007 SBE, Inc.
6 * Copyright (c) 2007-2010 Rising Tide Systems
7 * Copyright (c) 2008-2010 Linux-iSCSI.org
9 * Nicholas A. Bellinger <nab@kernel.org>
11 * This program is free software; you can redistribute it and/or modify
12 * it under the terms of the GNU General Public License as published by
13 * the Free Software Foundation; either version 2 of the License, or
14 * (at your option) any later version.
16 * This program is distributed in the hope that it will be useful,
17 * but WITHOUT ANY WARRANTY; without even the implied warranty of
18 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
19 * GNU General Public License for more details.
21 * You should have received a copy of the GNU General Public License
22 * along with this program; if not, write to the Free Software
23 * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
26 #include <linux/kernel.h>
27 #include <linux/module.h>
28 #include <asm/unaligned.h>
29 #include <scsi/scsi.h>
31 #include <target/target_core_base.h>
32 #include <target/target_core_transport.h>
33 #include <target/target_core_fabric_ops.h>
34 #include "target_core_ua.h"
35 #include "target_core_cdb.h"
38 target_fill_alua_data(struct se_port
*port
, unsigned char *buf
)
40 struct t10_alua_tg_pt_gp
*tg_pt_gp
;
41 struct t10_alua_tg_pt_gp_member
*tg_pt_gp_mem
;
44 * Set SCCS for MAINTENANCE_IN + REPORT_TARGET_PORT_GROUPS.
49 * Set TPGS field for explict and/or implict ALUA access type
52 * See spc4r17 section 6.4.2 Table 135
56 tg_pt_gp_mem
= port
->sep_alua_tg_pt_gp_mem
;
60 spin_lock(&tg_pt_gp_mem
->tg_pt_gp_mem_lock
);
61 tg_pt_gp
= tg_pt_gp_mem
->tg_pt_gp
;
63 buf
[5] |= tg_pt_gp
->tg_pt_gp_alua_access_type
;
64 spin_unlock(&tg_pt_gp_mem
->tg_pt_gp_mem_lock
);
68 target_emulate_inquiry_std(struct se_cmd
*cmd
)
70 struct se_lun
*lun
= cmd
->se_lun
;
71 struct se_device
*dev
= cmd
->se_dev
;
72 struct se_portal_group
*tpg
= lun
->lun_sep
->sep_tpg
;
76 * Make sure we at least have 6 bytes of INQUIRY response
77 * payload going back for EVPD=0
79 if (cmd
->data_length
< 6) {
80 pr_err("SCSI Inquiry payload length: %u"
81 " too small for EVPD=0\n", cmd
->data_length
);
85 buf
= transport_kmap_first_data_page(cmd
);
87 if (dev
== tpg
->tpg_virt_lun0
.lun_se_dev
) {
88 buf
[0] = 0x3f; /* Not connected */
90 buf
[0] = dev
->transport
->get_device_type(dev
);
91 if (buf
[0] == TYPE_TAPE
)
94 buf
[2] = dev
->transport
->get_device_rev(dev
);
97 * NORMACA and HISUP = 0, RESPONSE DATA FORMAT = 2
100 * A RESPONSE DATA FORMAT field set to 2h indicates that the
101 * standard INQUIRY data is in the format defined in this
102 * standard. Response data format values less than 2h are
103 * obsolete. Response data format values greater than 2h are
109 * Enable SCCS and TPGS fields for Emulated ALUA
111 if (dev
->se_sub_dev
->t10_alua
.alua_type
== SPC3_ALUA_EMULATED
)
112 target_fill_alua_data(lun
->lun_sep
, buf
);
114 if (cmd
->data_length
< 8) {
115 buf
[4] = 1; /* Set additional length to 1 */
119 buf
[7] = 0x32; /* Sync=1 and CmdQue=1 */
122 * Do not include vendor, product, reversion info in INQUIRY
123 * response payload for cdbs with a small allocation length.
125 if (cmd
->data_length
< 36) {
126 buf
[4] = 3; /* Set additional length to 3 */
130 snprintf((unsigned char *)&buf
[8], 8, "LIO-ORG");
131 snprintf((unsigned char *)&buf
[16], 16, "%s",
132 &dev
->se_sub_dev
->t10_wwn
.model
[0]);
133 snprintf((unsigned char *)&buf
[32], 4, "%s",
134 &dev
->se_sub_dev
->t10_wwn
.revision
[0]);
135 buf
[4] = 31; /* Set additional length to 31 */
138 transport_kunmap_first_data_page(cmd
);
142 /* unit serial number */
144 target_emulate_evpd_80(struct se_cmd
*cmd
, unsigned char *buf
)
146 struct se_device
*dev
= cmd
->se_dev
;
149 if (dev
->se_sub_dev
->su_dev_flags
&
150 SDF_EMULATED_VPD_UNIT_SERIAL
) {
154 strlen(&dev
->se_sub_dev
->t10_wwn
.unit_serial
[0]);
155 unit_serial_len
++; /* For NULL Terminator */
157 if (((len
+ 4) + unit_serial_len
) > cmd
->data_length
) {
158 len
+= unit_serial_len
;
159 buf
[2] = ((len
>> 8) & 0xff);
160 buf
[3] = (len
& 0xff);
163 len
+= sprintf((unsigned char *)&buf
[4], "%s",
164 &dev
->se_sub_dev
->t10_wwn
.unit_serial
[0]);
165 len
++; /* Extra Byte for NULL Terminator */
172 target_parse_naa_6h_vendor_specific(struct se_device
*dev
, unsigned char *buf
)
174 unsigned char *p
= &dev
->se_sub_dev
->t10_wwn
.unit_serial
[0];
179 * Generate up to 36 bits of VENDOR SPECIFIC IDENTIFIER starting on
180 * byte 3 bit 3-0 for NAA IEEE Registered Extended DESIGNATOR field
181 * format, followed by 64 bits of VENDOR SPECIFIC IDENTIFIER EXTENSION
182 * to complete the payload. These are based from VPD=0x80 PRODUCT SERIAL
183 * NUMBER set via vpd_unit_serial in target_core_configfs.c to ensure
184 * per device uniqeness.
186 for (cnt
= 0; *p
&& cnt
< 13; p
++) {
187 int val
= hex_to_bin(*p
);
203 * Device identification VPD, for a complete list of
204 * DESIGNATOR TYPEs see spc4r17 Table 459.
207 target_emulate_evpd_83(struct se_cmd
*cmd
, unsigned char *buf
)
209 struct se_device
*dev
= cmd
->se_dev
;
210 struct se_lun
*lun
= cmd
->se_lun
;
211 struct se_port
*port
= NULL
;
212 struct se_portal_group
*tpg
= NULL
;
213 struct t10_alua_lu_gp_member
*lu_gp_mem
;
214 struct t10_alua_tg_pt_gp
*tg_pt_gp
;
215 struct t10_alua_tg_pt_gp_member
*tg_pt_gp_mem
;
216 unsigned char *prod
= &dev
->se_sub_dev
->t10_wwn
.model
[0];
218 u32 unit_serial_len
, off
= 0;
224 * NAA IEEE Registered Extended Assigned designator format, see
225 * spc4r17 section 7.7.3.6.5
227 * We depend upon a target_core_mod/ConfigFS provided
228 * /sys/kernel/config/target/core/$HBA/$DEV/wwn/vpd_unit_serial
229 * value in order to return the NAA id.
231 if (!(dev
->se_sub_dev
->su_dev_flags
& SDF_EMULATED_VPD_UNIT_SERIAL
))
232 goto check_t10_vend_desc
;
234 if (off
+ 20 > cmd
->data_length
)
235 goto check_t10_vend_desc
;
237 /* CODE SET == Binary */
240 /* Set ASSOCIATION == addressed logical unit: 0)b */
243 /* Identifier/Designator type == NAA identifier */
247 /* Identifier/Designator length */
251 * Start NAA IEEE Registered Extended Identifier/Designator
253 buf
[off
++] = (0x6 << 4);
256 * Use OpenFabrics IEEE Company ID: 00 14 05
260 buf
[off
] = (0x5 << 4);
263 * Return ConfigFS Unit Serial Number information for
264 * VENDOR_SPECIFIC_IDENTIFIER and
265 * VENDOR_SPECIFIC_IDENTIFIER_EXTENTION
267 target_parse_naa_6h_vendor_specific(dev
, &buf
[off
]);
274 * T10 Vendor Identifier Page, see spc4r17 section 7.7.3.4
276 id_len
= 8; /* For Vendor field */
277 prod_len
= 4; /* For VPD Header */
278 prod_len
+= 8; /* For Vendor field */
279 prod_len
+= strlen(prod
);
280 prod_len
++; /* For : */
282 if (dev
->se_sub_dev
->su_dev_flags
&
283 SDF_EMULATED_VPD_UNIT_SERIAL
) {
285 strlen(&dev
->se_sub_dev
->t10_wwn
.unit_serial
[0]);
286 unit_serial_len
++; /* For NULL Terminator */
288 if ((len
+ (id_len
+ 4) +
289 (prod_len
+ unit_serial_len
)) >
291 len
+= (prod_len
+ unit_serial_len
);
294 id_len
+= sprintf((unsigned char *)&buf
[off
+12],
296 &dev
->se_sub_dev
->t10_wwn
.unit_serial
[0]);
298 buf
[off
] = 0x2; /* ASCII */
299 buf
[off
+1] = 0x1; /* T10 Vendor ID */
301 memcpy((unsigned char *)&buf
[off
+4], "LIO-ORG", 8);
302 /* Extra Byte for NULL Terminator */
304 /* Identifier Length */
306 /* Header size for Designation descriptor */
310 * struct se_port is only set for INQUIRY VPD=1 through $FABRIC_MOD
315 struct t10_alua_lu_gp
*lu_gp
;
316 u32 padding
, scsi_name_len
;
323 * Relative target port identifer, see spc4r17
326 * Get the PROTOCOL IDENTIFIER as defined by spc4r17
327 * section 7.5.1 Table 362
329 if (((len
+ 4) + 8) > cmd
->data_length
) {
334 (tpg
->se_tpg_tfo
->get_fabric_proto_ident(tpg
) << 4);
335 buf
[off
++] |= 0x1; /* CODE SET == Binary */
336 buf
[off
] = 0x80; /* Set PIV=1 */
337 /* Set ASSOCIATION == target port: 01b */
339 /* DESIGNATOR TYPE == Relative target port identifer */
341 off
++; /* Skip over Reserved */
342 buf
[off
++] = 4; /* DESIGNATOR LENGTH */
343 /* Skip over Obsolete field in RTPI payload
346 buf
[off
++] = ((port
->sep_rtpi
>> 8) & 0xff);
347 buf
[off
++] = (port
->sep_rtpi
& 0xff);
348 len
+= 8; /* Header size + Designation descriptor */
350 * Target port group identifier, see spc4r17
353 * Get the PROTOCOL IDENTIFIER as defined by spc4r17
354 * section 7.5.1 Table 362
357 if (dev
->se_sub_dev
->t10_alua
.alua_type
!=
359 goto check_scsi_name
;
361 if (((len
+ 4) + 8) > cmd
->data_length
) {
365 tg_pt_gp_mem
= port
->sep_alua_tg_pt_gp_mem
;
369 spin_lock(&tg_pt_gp_mem
->tg_pt_gp_mem_lock
);
370 tg_pt_gp
= tg_pt_gp_mem
->tg_pt_gp
;
372 spin_unlock(&tg_pt_gp_mem
->tg_pt_gp_mem_lock
);
375 tg_pt_gp_id
= tg_pt_gp
->tg_pt_gp_id
;
376 spin_unlock(&tg_pt_gp_mem
->tg_pt_gp_mem_lock
);
379 (tpg
->se_tpg_tfo
->get_fabric_proto_ident(tpg
) << 4);
380 buf
[off
++] |= 0x1; /* CODE SET == Binary */
381 buf
[off
] = 0x80; /* Set PIV=1 */
382 /* Set ASSOCIATION == target port: 01b */
384 /* DESIGNATOR TYPE == Target port group identifier */
386 off
++; /* Skip over Reserved */
387 buf
[off
++] = 4; /* DESIGNATOR LENGTH */
388 off
+= 2; /* Skip over Reserved Field */
389 buf
[off
++] = ((tg_pt_gp_id
>> 8) & 0xff);
390 buf
[off
++] = (tg_pt_gp_id
& 0xff);
391 len
+= 8; /* Header size + Designation descriptor */
393 * Logical Unit Group identifier, see spc4r17
397 if (((len
+ 4) + 8) > cmd
->data_length
) {
399 goto check_scsi_name
;
401 lu_gp_mem
= dev
->dev_alua_lu_gp_mem
;
403 goto check_scsi_name
;
405 spin_lock(&lu_gp_mem
->lu_gp_mem_lock
);
406 lu_gp
= lu_gp_mem
->lu_gp
;
408 spin_unlock(&lu_gp_mem
->lu_gp_mem_lock
);
409 goto check_scsi_name
;
411 lu_gp_id
= lu_gp
->lu_gp_id
;
412 spin_unlock(&lu_gp_mem
->lu_gp_mem_lock
);
414 buf
[off
++] |= 0x1; /* CODE SET == Binary */
415 /* DESIGNATOR TYPE == Logical Unit Group identifier */
417 off
++; /* Skip over Reserved */
418 buf
[off
++] = 4; /* DESIGNATOR LENGTH */
419 off
+= 2; /* Skip over Reserved Field */
420 buf
[off
++] = ((lu_gp_id
>> 8) & 0xff);
421 buf
[off
++] = (lu_gp_id
& 0xff);
422 len
+= 8; /* Header size + Designation descriptor */
424 * SCSI name string designator, see spc4r17
427 * Get the PROTOCOL IDENTIFIER as defined by spc4r17
428 * section 7.5.1 Table 362
431 scsi_name_len
= strlen(tpg
->se_tpg_tfo
->tpg_get_wwn(tpg
));
432 /* UTF-8 ",t,0x<16-bit TPGT>" + NULL Terminator */
434 /* Check for 4-byte padding */
435 padding
= ((-scsi_name_len
) & 3);
437 scsi_name_len
+= padding
;
438 /* Header size + Designation descriptor */
441 if (((len
+ 4) + scsi_name_len
) > cmd
->data_length
) {
442 len
+= scsi_name_len
;
446 (tpg
->se_tpg_tfo
->get_fabric_proto_ident(tpg
) << 4);
447 buf
[off
++] |= 0x3; /* CODE SET == UTF-8 */
448 buf
[off
] = 0x80; /* Set PIV=1 */
449 /* Set ASSOCIATION == target port: 01b */
451 /* DESIGNATOR TYPE == SCSI name string */
453 off
+= 2; /* Skip over Reserved and length */
455 * SCSI name string identifer containing, $FABRIC_MOD
456 * dependent information. For LIO-Target and iSCSI
457 * Target Port, this means "<iSCSI name>,t,0x<TPGT> in
460 tpgt
= tpg
->se_tpg_tfo
->tpg_get_tag(tpg
);
461 scsi_name_len
= sprintf(&buf
[off
], "%s,t,0x%04x",
462 tpg
->se_tpg_tfo
->tpg_get_wwn(tpg
), tpgt
);
463 scsi_name_len
+= 1 /* Include NULL terminator */;
465 * The null-terminated, null-padded (see 4.4.2) SCSI
466 * NAME STRING field contains a UTF-8 format string.
467 * The number of bytes in the SCSI NAME STRING field
468 * (i.e., the value in the DESIGNATOR LENGTH field)
469 * shall be no larger than 256 and shall be a multiple
473 scsi_name_len
+= padding
;
475 buf
[off
-1] = scsi_name_len
;
476 off
+= scsi_name_len
;
477 /* Header size + Designation descriptor */
478 len
+= (scsi_name_len
+ 4);
481 buf
[2] = ((len
>> 8) & 0xff);
482 buf
[3] = (len
& 0xff); /* Page Length for VPD 0x83 */
486 /* Extended INQUIRY Data VPD Page */
488 target_emulate_evpd_86(struct se_cmd
*cmd
, unsigned char *buf
)
490 if (cmd
->data_length
< 60)
494 /* Set HEADSUP, ORDSUP, SIMPSUP */
497 /* If WriteCache emulation is enabled, set V_SUP */
498 if (cmd
->se_dev
->se_sub_dev
->se_dev_attrib
.emulate_write_cache
> 0)
503 /* Block Limits VPD page */
505 target_emulate_evpd_b0(struct se_cmd
*cmd
, unsigned char *buf
)
507 struct se_device
*dev
= cmd
->se_dev
;
511 * Following sbc3r22 section 6.5.3 Block Limits VPD page, when
512 * emulate_tpu=1 or emulate_tpws=1 we will be expect a
513 * different page length for Thin Provisioning.
515 if (dev
->se_sub_dev
->se_dev_attrib
.emulate_tpu
|| dev
->se_sub_dev
->se_dev_attrib
.emulate_tpws
)
518 if (cmd
->data_length
< (0x10 + 4)) {
519 pr_debug("Received data_length: %u"
520 " too small for EVPD 0xb0\n",
525 if (have_tp
&& cmd
->data_length
< (0x3c + 4)) {
526 pr_debug("Received data_length: %u"
527 " too small for TPE=1 EVPD 0xb0\n",
532 buf
[0] = dev
->transport
->get_device_type(dev
);
533 buf
[3] = have_tp
? 0x3c : 0x10;
539 * Set OPTIMAL TRANSFER LENGTH GRANULARITY
541 put_unaligned_be16(1, &buf
[6]);
544 * Set MAXIMUM TRANSFER LENGTH
546 put_unaligned_be32(dev
->se_sub_dev
->se_dev_attrib
.max_sectors
, &buf
[8]);
549 * Set OPTIMAL TRANSFER LENGTH
551 put_unaligned_be32(dev
->se_sub_dev
->se_dev_attrib
.optimal_sectors
, &buf
[12]);
554 * Exit now if we don't support TP or the initiator sent a too
557 if (!have_tp
|| cmd
->data_length
< (0x3c + 4))
561 * Set MAXIMUM UNMAP LBA COUNT
563 put_unaligned_be32(dev
->se_sub_dev
->se_dev_attrib
.max_unmap_lba_count
, &buf
[20]);
566 * Set MAXIMUM UNMAP BLOCK DESCRIPTOR COUNT
568 put_unaligned_be32(dev
->se_sub_dev
->se_dev_attrib
.max_unmap_block_desc_count
,
572 * Set OPTIMAL UNMAP GRANULARITY
574 put_unaligned_be32(dev
->se_sub_dev
->se_dev_attrib
.unmap_granularity
, &buf
[28]);
577 * UNMAP GRANULARITY ALIGNMENT
579 put_unaligned_be32(dev
->se_sub_dev
->se_dev_attrib
.unmap_granularity_alignment
,
581 if (dev
->se_sub_dev
->se_dev_attrib
.unmap_granularity_alignment
!= 0)
582 buf
[32] |= 0x80; /* Set the UGAVALID bit */
587 /* Block Device Characteristics VPD page */
589 target_emulate_evpd_b1(struct se_cmd
*cmd
, unsigned char *buf
)
591 struct se_device
*dev
= cmd
->se_dev
;
593 buf
[0] = dev
->transport
->get_device_type(dev
);
596 if (cmd
->data_length
>= 5 &&
597 dev
->se_sub_dev
->se_dev_attrib
.is_nonrot
)
603 /* Thin Provisioning VPD */
605 target_emulate_evpd_b2(struct se_cmd
*cmd
, unsigned char *buf
)
607 struct se_device
*dev
= cmd
->se_dev
;
610 * From sbc3r22 section 6.5.4 Thin Provisioning VPD page:
612 * The PAGE LENGTH field is defined in SPC-4. If the DP bit is set to
613 * zero, then the page length shall be set to 0004h. If the DP bit
614 * is set to one, then the page length shall be set to the value
615 * defined in table 162.
617 buf
[0] = dev
->transport
->get_device_type(dev
);
620 * Set Hardcoded length mentioned above for DP=0
622 put_unaligned_be16(0x0004, &buf
[2]);
625 * The THRESHOLD EXPONENT field indicates the threshold set size in
626 * LBAs as a power of 2 (i.e., the threshold set size is equal to
627 * 2(threshold exponent)).
629 * Note that this is currently set to 0x00 as mkp says it will be
630 * changing again. We can enable this once it has settled in T10
631 * and is actually used by Linux/SCSI ML code.
636 * A TPU bit set to one indicates that the device server supports
637 * the UNMAP command (see 5.25). A TPU bit set to zero indicates
638 * that the device server does not support the UNMAP command.
640 if (dev
->se_sub_dev
->se_dev_attrib
.emulate_tpu
!= 0)
644 * A TPWS bit set to one indicates that the device server supports
645 * the use of the WRITE SAME (16) command (see 5.42) to unmap LBAs.
646 * A TPWS bit set to zero indicates that the device server does not
647 * support the use of the WRITE SAME (16) command to unmap LBAs.
649 if (dev
->se_sub_dev
->se_dev_attrib
.emulate_tpws
!= 0)
656 target_emulate_evpd_00(struct se_cmd
*cmd
, unsigned char *buf
);
660 int (*emulate
)(struct se_cmd
*, unsigned char *);
661 } evpd_handlers
[] = {
662 { .page
= 0x00, .emulate
= target_emulate_evpd_00
},
663 { .page
= 0x80, .emulate
= target_emulate_evpd_80
},
664 { .page
= 0x83, .emulate
= target_emulate_evpd_83
},
665 { .page
= 0x86, .emulate
= target_emulate_evpd_86
},
666 { .page
= 0xb0, .emulate
= target_emulate_evpd_b0
},
667 { .page
= 0xb1, .emulate
= target_emulate_evpd_b1
},
668 { .page
= 0xb2, .emulate
= target_emulate_evpd_b2
},
671 /* supported vital product data pages */
673 target_emulate_evpd_00(struct se_cmd
*cmd
, unsigned char *buf
)
677 if (cmd
->data_length
< 8)
680 * Only report the INQUIRY EVPD=1 pages after a valid NAA
681 * Registered Extended LUN WWN has been set via ConfigFS
682 * during device creation/restart.
684 if (cmd
->se_dev
->se_sub_dev
->su_dev_flags
&
685 SDF_EMULATED_VPD_UNIT_SERIAL
) {
686 buf
[3] = ARRAY_SIZE(evpd_handlers
);
687 for (p
= 0; p
< min_t(int, ARRAY_SIZE(evpd_handlers
),
688 cmd
->data_length
- 4); ++p
)
689 buf
[p
+ 4] = evpd_handlers
[p
].page
;
695 int target_emulate_inquiry(struct se_task
*task
)
697 struct se_cmd
*cmd
= task
->task_se_cmd
;
698 struct se_device
*dev
= cmd
->se_dev
;
700 unsigned char *cdb
= cmd
->t_task_cdb
;
703 if (!(cdb
[1] & 0x1)) {
704 ret
= target_emulate_inquiry_std(cmd
);
709 * Make sure we at least have 4 bytes of INQUIRY response
710 * payload for 0x00 going back for EVPD=1. Note that 0x80
711 * and 0x83 will check for enough payload data length and
712 * jump to set_len: label when there is not enough inquiry EVPD
713 * payload length left for the next outgoing EVPD metadata
715 if (cmd
->data_length
< 4) {
716 pr_err("SCSI Inquiry payload length: %u"
717 " too small for EVPD=1\n", cmd
->data_length
);
718 cmd
->scsi_sense_reason
= TCM_INVALID_CDB_FIELD
;
722 buf
= transport_kmap_first_data_page(cmd
);
724 buf
[0] = dev
->transport
->get_device_type(dev
);
726 for (p
= 0; p
< ARRAY_SIZE(evpd_handlers
); ++p
) {
727 if (cdb
[2] == evpd_handlers
[p
].page
) {
729 ret
= evpd_handlers
[p
].emulate(cmd
, buf
);
734 pr_err("Unknown VPD Code: 0x%02x\n", cdb
[2]);
735 cmd
->scsi_sense_reason
= TCM_UNSUPPORTED_SCSI_OPCODE
;
739 transport_kunmap_first_data_page(cmd
);
742 task
->task_scsi_status
= GOOD
;
743 transport_complete_task(task
, 1);
748 int target_emulate_readcapacity(struct se_task
*task
)
750 struct se_cmd
*cmd
= task
->task_se_cmd
;
751 struct se_device
*dev
= cmd
->se_dev
;
753 unsigned long long blocks_long
= dev
->transport
->get_blocks(dev
);
756 if (blocks_long
>= 0x00000000ffffffff)
759 blocks
= (u32
)blocks_long
;
761 buf
= transport_kmap_first_data_page(cmd
);
763 buf
[0] = (blocks
>> 24) & 0xff;
764 buf
[1] = (blocks
>> 16) & 0xff;
765 buf
[2] = (blocks
>> 8) & 0xff;
766 buf
[3] = blocks
& 0xff;
767 buf
[4] = (dev
->se_sub_dev
->se_dev_attrib
.block_size
>> 24) & 0xff;
768 buf
[5] = (dev
->se_sub_dev
->se_dev_attrib
.block_size
>> 16) & 0xff;
769 buf
[6] = (dev
->se_sub_dev
->se_dev_attrib
.block_size
>> 8) & 0xff;
770 buf
[7] = dev
->se_sub_dev
->se_dev_attrib
.block_size
& 0xff;
772 * Set max 32-bit blocks to signal SERVICE ACTION READ_CAPACITY_16
774 if (dev
->se_sub_dev
->se_dev_attrib
.emulate_tpu
|| dev
->se_sub_dev
->se_dev_attrib
.emulate_tpws
)
775 put_unaligned_be32(0xFFFFFFFF, &buf
[0]);
777 transport_kunmap_first_data_page(cmd
);
779 task
->task_scsi_status
= GOOD
;
780 transport_complete_task(task
, 1);
784 int target_emulate_readcapacity_16(struct se_task
*task
)
786 struct se_cmd
*cmd
= task
->task_se_cmd
;
787 struct se_device
*dev
= cmd
->se_dev
;
789 unsigned long long blocks
= dev
->transport
->get_blocks(dev
);
791 buf
= transport_kmap_first_data_page(cmd
);
793 buf
[0] = (blocks
>> 56) & 0xff;
794 buf
[1] = (blocks
>> 48) & 0xff;
795 buf
[2] = (blocks
>> 40) & 0xff;
796 buf
[3] = (blocks
>> 32) & 0xff;
797 buf
[4] = (blocks
>> 24) & 0xff;
798 buf
[5] = (blocks
>> 16) & 0xff;
799 buf
[6] = (blocks
>> 8) & 0xff;
800 buf
[7] = blocks
& 0xff;
801 buf
[8] = (dev
->se_sub_dev
->se_dev_attrib
.block_size
>> 24) & 0xff;
802 buf
[9] = (dev
->se_sub_dev
->se_dev_attrib
.block_size
>> 16) & 0xff;
803 buf
[10] = (dev
->se_sub_dev
->se_dev_attrib
.block_size
>> 8) & 0xff;
804 buf
[11] = dev
->se_sub_dev
->se_dev_attrib
.block_size
& 0xff;
806 * Set Thin Provisioning Enable bit following sbc3r22 in section
807 * READ CAPACITY (16) byte 14 if emulate_tpu or emulate_tpws is enabled.
809 if (dev
->se_sub_dev
->se_dev_attrib
.emulate_tpu
|| dev
->se_sub_dev
->se_dev_attrib
.emulate_tpws
)
812 transport_kunmap_first_data_page(cmd
);
814 task
->task_scsi_status
= GOOD
;
815 transport_complete_task(task
, 1);
820 target_modesense_rwrecovery(unsigned char *p
)
829 target_modesense_control(struct se_device
*dev
, unsigned char *p
)
835 * From spc4r23, 7.4.7 Control mode page
837 * The QUEUE ALGORITHM MODIFIER field (see table 368) specifies
838 * restrictions on the algorithm used for reordering commands
839 * having the SIMPLE task attribute (see SAM-4).
841 * Table 368 -- QUEUE ALGORITHM MODIFIER field
843 * 0h Restricted reordering
844 * 1h Unrestricted reordering allowed
846 * 8h to Fh Vendor specific
848 * A value of zero in the QUEUE ALGORITHM MODIFIER field specifies that
849 * the device server shall order the processing sequence of commands
850 * having the SIMPLE task attribute such that data integrity is maintained
851 * for that I_T nexus (i.e., if the transmission of new SCSI transport protocol
852 * requests is halted at any time, the final value of all data observable
853 * on the medium shall be the same as if all the commands had been processed
854 * with the ORDERED task attribute).
856 * A value of one in the QUEUE ALGORITHM MODIFIER field specifies that the
857 * device server may reorder the processing sequence of commands having the
858 * SIMPLE task attribute in any manner. Any data integrity exposures related to
859 * command sequence order shall be explicitly handled by the application client
860 * through the selection of appropriate ommands and task attributes.
862 p
[3] = (dev
->se_sub_dev
->se_dev_attrib
.emulate_rest_reord
== 1) ? 0x00 : 0x10;
864 * From spc4r17, section 7.4.6 Control mode Page
866 * Unit Attention interlocks control (UN_INTLCK_CTRL) to code 00b
868 * 00b: The logical unit shall clear any unit attention condition
869 * reported in the same I_T_L_Q nexus transaction as a CHECK CONDITION
870 * status and shall not establish a unit attention condition when a com-
871 * mand is completed with BUSY, TASK SET FULL, or RESERVATION CONFLICT
874 * 10b: The logical unit shall not clear any unit attention condition
875 * reported in the same I_T_L_Q nexus transaction as a CHECK CONDITION
876 * status and shall not establish a unit attention condition when
877 * a command is completed with BUSY, TASK SET FULL, or RESERVATION
880 * 11b a The logical unit shall not clear any unit attention condition
881 * reported in the same I_T_L_Q nexus transaction as a CHECK CONDITION
882 * status and shall establish a unit attention condition for the
883 * initiator port associated with the I_T nexus on which the BUSY,
884 * TASK SET FULL, or RESERVATION CONFLICT status is being returned.
885 * Depending on the status, the additional sense code shall be set to
886 * PREVIOUS BUSY STATUS, PREVIOUS TASK SET FULL STATUS, or PREVIOUS
887 * RESERVATION CONFLICT STATUS. Until it is cleared by a REQUEST SENSE
888 * command, a unit attention condition shall be established only once
889 * for a BUSY, TASK SET FULL, or RESERVATION CONFLICT status regardless
890 * to the number of commands completed with one of those status codes.
892 p
[4] = (dev
->se_sub_dev
->se_dev_attrib
.emulate_ua_intlck_ctrl
== 2) ? 0x30 :
893 (dev
->se_sub_dev
->se_dev_attrib
.emulate_ua_intlck_ctrl
== 1) ? 0x20 : 0x00;
895 * From spc4r17, section 7.4.6 Control mode Page
897 * Task Aborted Status (TAS) bit set to zero.
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).
906 p
[5] = (dev
->se_sub_dev
->se_dev_attrib
.emulate_tas
) ? 0x40 : 0x00;
915 target_modesense_caching(struct se_device
*dev
, unsigned char *p
)
919 if (dev
->se_sub_dev
->se_dev_attrib
.emulate_write_cache
> 0)
920 p
[2] = 0x04; /* Write Cache Enable */
921 p
[12] = 0x20; /* Disabled Read Ahead */
927 target_modesense_write_protect(unsigned char *buf
, int type
)
930 * I believe that the WP bit (bit 7) in the mode header is the same for
937 buf
[0] |= 0x80; /* WP bit */
943 target_modesense_dpofua(unsigned char *buf
, int type
)
947 buf
[0] |= 0x10; /* DPOFUA bit */
954 int target_emulate_modesense(struct se_task
*task
)
956 struct se_cmd
*cmd
= task
->task_se_cmd
;
957 struct se_device
*dev
= cmd
->se_dev
;
958 char *cdb
= cmd
->t_task_cdb
;
960 int type
= dev
->transport
->get_device_type(dev
);
961 int ten
= (cmd
->t_task_cdb
[0] == MODE_SENSE_10
);
962 int offset
= ten
? 8 : 4;
964 unsigned char buf
[SE_MODE_PAGE_BUF
];
966 memset(buf
, 0, SE_MODE_PAGE_BUF
);
968 switch (cdb
[2] & 0x3f) {
970 length
= target_modesense_rwrecovery(&buf
[offset
]);
973 length
= target_modesense_caching(dev
, &buf
[offset
]);
976 length
= target_modesense_control(dev
, &buf
[offset
]);
979 length
= target_modesense_rwrecovery(&buf
[offset
]);
980 length
+= target_modesense_caching(dev
, &buf
[offset
+length
]);
981 length
+= target_modesense_control(dev
, &buf
[offset
+length
]);
984 pr_err("MODE SENSE: unimplemented page/subpage: 0x%02x/0x%02x\n",
985 cdb
[2] & 0x3f, cdb
[3]);
986 cmd
->scsi_sense_reason
= TCM_UNKNOWN_MODE_PAGE
;
993 buf
[0] = (offset
>> 8) & 0xff;
994 buf
[1] = offset
& 0xff;
996 if ((cmd
->se_lun
->lun_access
& TRANSPORT_LUNFLAGS_READ_ONLY
) ||
998 (cmd
->se_deve
->lun_flags
& TRANSPORT_LUNFLAGS_READ_ONLY
)))
999 target_modesense_write_protect(&buf
[3], type
);
1001 if ((dev
->se_sub_dev
->se_dev_attrib
.emulate_write_cache
> 0) &&
1002 (dev
->se_sub_dev
->se_dev_attrib
.emulate_fua_write
> 0))
1003 target_modesense_dpofua(&buf
[3], type
);
1005 if ((offset
+ 2) > cmd
->data_length
)
1006 offset
= cmd
->data_length
;
1010 buf
[0] = offset
& 0xff;
1012 if ((cmd
->se_lun
->lun_access
& TRANSPORT_LUNFLAGS_READ_ONLY
) ||
1014 (cmd
->se_deve
->lun_flags
& TRANSPORT_LUNFLAGS_READ_ONLY
)))
1015 target_modesense_write_protect(&buf
[2], type
);
1017 if ((dev
->se_sub_dev
->se_dev_attrib
.emulate_write_cache
> 0) &&
1018 (dev
->se_sub_dev
->se_dev_attrib
.emulate_fua_write
> 0))
1019 target_modesense_dpofua(&buf
[2], type
);
1021 if ((offset
+ 1) > cmd
->data_length
)
1022 offset
= cmd
->data_length
;
1025 rbuf
= transport_kmap_first_data_page(cmd
);
1026 memcpy(rbuf
, buf
, offset
);
1027 transport_kunmap_first_data_page(cmd
);
1029 task
->task_scsi_status
= GOOD
;
1030 transport_complete_task(task
, 1);
1034 int target_emulate_request_sense(struct se_task
*task
)
1036 struct se_cmd
*cmd
= task
->task_se_cmd
;
1037 unsigned char *cdb
= cmd
->t_task_cdb
;
1039 u8 ua_asc
= 0, ua_ascq
= 0;
1042 if (cdb
[1] & 0x01) {
1043 pr_err("REQUEST_SENSE description emulation not"
1045 cmd
->scsi_sense_reason
= TCM_INVALID_CDB_FIELD
;
1049 buf
= transport_kmap_first_data_page(cmd
);
1051 if (!core_scsi3_ua_clear_for_request_sense(cmd
, &ua_asc
, &ua_ascq
)) {
1053 * CURRENT ERROR, UNIT ATTENTION
1056 buf
[SPC_SENSE_KEY_OFFSET
] = UNIT_ATTENTION
;
1058 * Make sure request data length is enough for additional
1061 if (cmd
->data_length
<= 18) {
1067 * The Additional Sense Code (ASC) from the UNIT ATTENTION
1069 buf
[SPC_ASC_KEY_OFFSET
] = ua_asc
;
1070 buf
[SPC_ASCQ_KEY_OFFSET
] = ua_ascq
;
1074 * CURRENT ERROR, NO SENSE
1077 buf
[SPC_SENSE_KEY_OFFSET
] = NO_SENSE
;
1079 * Make sure request data length is enough for additional
1082 if (cmd
->data_length
<= 18) {
1088 * NO ADDITIONAL SENSE INFORMATION
1090 buf
[SPC_ASC_KEY_OFFSET
] = 0x00;
1095 transport_kunmap_first_data_page(cmd
);
1096 task
->task_scsi_status
= GOOD
;
1097 transport_complete_task(task
, 1);
1102 * Used for TCM/IBLOCK and TCM/FILEIO for block/blk-lib.c level discard support.
1103 * Note this is not used for TCM/pSCSI passthrough
1105 int target_emulate_unmap(struct se_task
*task
)
1107 struct se_cmd
*cmd
= task
->task_se_cmd
;
1108 struct se_device
*dev
= cmd
->se_dev
;
1109 unsigned char *buf
, *ptr
= NULL
;
1110 unsigned char *cdb
= &cmd
->t_task_cdb
[0];
1112 unsigned int size
= cmd
->data_length
, range
;
1113 int ret
= 0, offset
;
1114 unsigned short dl
, bd_dl
;
1116 if (!dev
->transport
->do_discard
) {
1117 pr_err("UNMAP emulation not supported for: %s\n",
1118 dev
->transport
->name
);
1119 cmd
->scsi_sense_reason
= TCM_UNSUPPORTED_SCSI_OPCODE
;
1123 /* First UNMAP block descriptor starts at 8 byte offset */
1126 dl
= get_unaligned_be16(&cdb
[0]);
1127 bd_dl
= get_unaligned_be16(&cdb
[2]);
1129 buf
= transport_kmap_first_data_page(cmd
);
1132 pr_debug("UNMAP: Sub: %s Using dl: %hu bd_dl: %hu size: %hu"
1133 " ptr: %p\n", dev
->transport
->name
, dl
, bd_dl
, size
, ptr
);
1136 lba
= get_unaligned_be64(&ptr
[0]);
1137 range
= get_unaligned_be32(&ptr
[8]);
1138 pr_debug("UNMAP: Using lba: %llu and range: %u\n",
1139 (unsigned long long)lba
, range
);
1141 ret
= dev
->transport
->do_discard(dev
, lba
, range
);
1143 pr_err("blkdev_issue_discard() failed: %d\n",
1153 transport_kunmap_first_data_page(cmd
);
1155 task
->task_scsi_status
= GOOD
;
1156 transport_complete_task(task
, 1);
1162 * Used for TCM/IBLOCK and TCM/FILEIO for block/blk-lib.c level discard support.
1163 * Note this is not used for TCM/pSCSI passthrough
1165 int target_emulate_write_same(struct se_task
*task
)
1167 struct se_cmd
*cmd
= task
->task_se_cmd
;
1168 struct se_device
*dev
= cmd
->se_dev
;
1170 sector_t lba
= cmd
->t_task_lba
;
1174 if (!dev
->transport
->do_discard
) {
1175 pr_err("WRITE_SAME emulation not supported"
1176 " for: %s\n", dev
->transport
->name
);
1177 cmd
->scsi_sense_reason
= TCM_UNSUPPORTED_SCSI_OPCODE
;
1181 if (cmd
->t_task_cdb
[0] == WRITE_SAME
)
1182 num_blocks
= get_unaligned_be16(&cmd
->t_task_cdb
[7]);
1183 else if (cmd
->t_task_cdb
[0] == WRITE_SAME_16
)
1184 num_blocks
= get_unaligned_be32(&cmd
->t_task_cdb
[10]);
1185 else /* WRITE_SAME_32 via VARIABLE_LENGTH_CMD */
1186 num_blocks
= get_unaligned_be32(&cmd
->t_task_cdb
[28]);
1189 * Use the explicit range when non zero is supplied, otherwise calculate
1190 * the remaining range based on ->get_blocks() - starting LBA.
1192 if (num_blocks
!= 0)
1195 range
= (dev
->transport
->get_blocks(dev
) - lba
);
1197 pr_debug("WRITE_SAME UNMAP: LBA: %llu Range: %llu\n",
1198 (unsigned long long)lba
, (unsigned long long)range
);
1200 ret
= dev
->transport
->do_discard(dev
, lba
, range
);
1202 pr_debug("blkdev_issue_discard() failed for WRITE_SAME\n");
1206 task
->task_scsi_status
= GOOD
;
1207 transport_complete_task(task
, 1);
1211 int target_emulate_synchronize_cache(struct se_task
*task
)
1213 struct se_device
*dev
= task
->task_se_cmd
->se_dev
;
1214 struct se_cmd
*cmd
= task
->task_se_cmd
;
1216 if (!dev
->transport
->do_sync_cache
) {
1217 pr_err("SYNCHRONIZE_CACHE emulation not supported"
1218 " for: %s\n", dev
->transport
->name
);
1219 cmd
->scsi_sense_reason
= TCM_UNSUPPORTED_SCSI_OPCODE
;
1223 dev
->transport
->do_sync_cache(task
);
1227 int target_emulate_noop(struct se_task
*task
)
1229 task
->task_scsi_status
= GOOD
;
1230 transport_complete_task(task
, 1);
1235 * Write a CDB into @cdb that is based on the one the intiator sent us,
1236 * but updated to only cover the sectors that the current task handles.
1238 void target_get_task_cdb(struct se_task
*task
, unsigned char *cdb
)
1240 struct se_cmd
*cmd
= task
->task_se_cmd
;
1241 unsigned int cdb_len
= scsi_command_size(cmd
->t_task_cdb
);
1243 memcpy(cdb
, cmd
->t_task_cdb
, cdb_len
);
1244 if (cmd
->se_cmd_flags
& SCF_SCSI_DATA_SG_IO_CDB
) {
1245 unsigned long long lba
= task
->task_lba
;
1246 u32 sectors
= task
->task_sectors
;
1250 /* 21-bit LBA and 8-bit sectors */
1251 cdb
[1] = (lba
>> 16) & 0x1f;
1252 cdb
[2] = (lba
>> 8) & 0xff;
1253 cdb
[3] = lba
& 0xff;
1254 cdb
[4] = sectors
& 0xff;
1257 /* 32-bit LBA and 16-bit sectors */
1258 put_unaligned_be32(lba
, &cdb
[2]);
1259 put_unaligned_be16(sectors
, &cdb
[7]);
1262 /* 32-bit LBA and 32-bit sectors */
1263 put_unaligned_be32(lba
, &cdb
[2]);
1264 put_unaligned_be32(sectors
, &cdb
[6]);
1267 /* 64-bit LBA and 32-bit sectors */
1268 put_unaligned_be64(lba
, &cdb
[2]);
1269 put_unaligned_be32(sectors
, &cdb
[10]);
1272 /* 64-bit LBA and 32-bit sectors, extended CDB */
1273 put_unaligned_be64(lba
, &cdb
[12]);
1274 put_unaligned_be32(sectors
, &cdb
[28]);
1281 EXPORT_SYMBOL(target_get_task_cdb
);