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"
37 target_fill_alua_data(struct se_port
*port
, unsigned char *buf
)
39 struct t10_alua_tg_pt_gp
*tg_pt_gp
;
40 struct t10_alua_tg_pt_gp_member
*tg_pt_gp_mem
;
43 * Set SCCS for MAINTENANCE_IN + REPORT_TARGET_PORT_GROUPS.
48 * Set TPGS field for explict and/or implict ALUA access type
51 * See spc4r17 section 6.4.2 Table 135
55 tg_pt_gp_mem
= port
->sep_alua_tg_pt_gp_mem
;
59 spin_lock(&tg_pt_gp_mem
->tg_pt_gp_mem_lock
);
60 tg_pt_gp
= tg_pt_gp_mem
->tg_pt_gp
;
62 buf
[5] |= tg_pt_gp
->tg_pt_gp_alua_access_type
;
63 spin_unlock(&tg_pt_gp_mem
->tg_pt_gp_mem_lock
);
67 target_emulate_inquiry_std(struct se_cmd
*cmd
)
69 struct se_lun
*lun
= cmd
->se_lun
;
70 struct se_device
*dev
= cmd
->se_dev
;
71 struct se_portal_group
*tpg
= lun
->lun_sep
->sep_tpg
;
75 * Make sure we at least have 6 bytes of INQUIRY response
76 * payload going back for EVPD=0
78 if (cmd
->data_length
< 6) {
79 pr_err("SCSI Inquiry payload length: %u"
80 " too small for EVPD=0\n", cmd
->data_length
);
84 buf
= transport_kmap_first_data_page(cmd
);
86 if (dev
== tpg
->tpg_virt_lun0
.lun_se_dev
) {
87 buf
[0] = 0x3f; /* Not connected */
89 buf
[0] = dev
->transport
->get_device_type(dev
);
90 if (buf
[0] == TYPE_TAPE
)
93 buf
[2] = dev
->transport
->get_device_rev(dev
);
96 * Enable SCCS and TPGS fields for Emulated ALUA
98 if (dev
->se_sub_dev
->t10_alua
.alua_type
== SPC3_ALUA_EMULATED
)
99 target_fill_alua_data(lun
->lun_sep
, buf
);
101 if (cmd
->data_length
< 8) {
102 buf
[4] = 1; /* Set additional length to 1 */
106 buf
[7] = 0x32; /* Sync=1 and CmdQue=1 */
109 * Do not include vendor, product, reversion info in INQUIRY
110 * response payload for cdbs with a small allocation length.
112 if (cmd
->data_length
< 36) {
113 buf
[4] = 3; /* Set additional length to 3 */
117 snprintf((unsigned char *)&buf
[8], 8, "LIO-ORG");
118 snprintf((unsigned char *)&buf
[16], 16, "%s",
119 &dev
->se_sub_dev
->t10_wwn
.model
[0]);
120 snprintf((unsigned char *)&buf
[32], 4, "%s",
121 &dev
->se_sub_dev
->t10_wwn
.revision
[0]);
122 buf
[4] = 31; /* Set additional length to 31 */
125 transport_kunmap_first_data_page(cmd
);
129 /* unit serial number */
131 target_emulate_evpd_80(struct se_cmd
*cmd
, unsigned char *buf
)
133 struct se_device
*dev
= cmd
->se_dev
;
136 if (dev
->se_sub_dev
->su_dev_flags
&
137 SDF_EMULATED_VPD_UNIT_SERIAL
) {
141 strlen(&dev
->se_sub_dev
->t10_wwn
.unit_serial
[0]);
142 unit_serial_len
++; /* For NULL Terminator */
144 if (((len
+ 4) + unit_serial_len
) > cmd
->data_length
) {
145 len
+= unit_serial_len
;
146 buf
[2] = ((len
>> 8) & 0xff);
147 buf
[3] = (len
& 0xff);
150 len
+= sprintf((unsigned char *)&buf
[4], "%s",
151 &dev
->se_sub_dev
->t10_wwn
.unit_serial
[0]);
152 len
++; /* Extra Byte for NULL Terminator */
159 target_parse_naa_6h_vendor_specific(struct se_device
*dev
, unsigned char *buf
)
161 unsigned char *p
= &dev
->se_sub_dev
->t10_wwn
.unit_serial
[0];
166 * Generate up to 36 bits of VENDOR SPECIFIC IDENTIFIER starting on
167 * byte 3 bit 3-0 for NAA IEEE Registered Extended DESIGNATOR field
168 * format, followed by 64 bits of VENDOR SPECIFIC IDENTIFIER EXTENSION
169 * to complete the payload. These are based from VPD=0x80 PRODUCT SERIAL
170 * NUMBER set via vpd_unit_serial in target_core_configfs.c to ensure
171 * per device uniqeness.
173 for (cnt
= 0; *p
&& cnt
< 13; p
++) {
174 int val
= hex_to_bin(*p
);
190 * Device identification VPD, for a complete list of
191 * DESIGNATOR TYPEs see spc4r17 Table 459.
194 target_emulate_evpd_83(struct se_cmd
*cmd
, unsigned char *buf
)
196 struct se_device
*dev
= cmd
->se_dev
;
197 struct se_lun
*lun
= cmd
->se_lun
;
198 struct se_port
*port
= NULL
;
199 struct se_portal_group
*tpg
= NULL
;
200 struct t10_alua_lu_gp_member
*lu_gp_mem
;
201 struct t10_alua_tg_pt_gp
*tg_pt_gp
;
202 struct t10_alua_tg_pt_gp_member
*tg_pt_gp_mem
;
203 unsigned char *prod
= &dev
->se_sub_dev
->t10_wwn
.model
[0];
205 u32 unit_serial_len
, off
= 0;
211 * NAA IEEE Registered Extended Assigned designator format, see
212 * spc4r17 section 7.7.3.6.5
214 * We depend upon a target_core_mod/ConfigFS provided
215 * /sys/kernel/config/target/core/$HBA/$DEV/wwn/vpd_unit_serial
216 * value in order to return the NAA id.
218 if (!(dev
->se_sub_dev
->su_dev_flags
& SDF_EMULATED_VPD_UNIT_SERIAL
))
219 goto check_t10_vend_desc
;
221 if (off
+ 20 > cmd
->data_length
)
222 goto check_t10_vend_desc
;
224 /* CODE SET == Binary */
227 /* Set ASSOCIATION == addressed logical unit: 0)b */
230 /* Identifier/Designator type == NAA identifier */
234 /* Identifier/Designator length */
238 * Start NAA IEEE Registered Extended Identifier/Designator
240 buf
[off
++] = (0x6 << 4);
243 * Use OpenFabrics IEEE Company ID: 00 14 05
247 buf
[off
] = (0x5 << 4);
250 * Return ConfigFS Unit Serial Number information for
251 * VENDOR_SPECIFIC_IDENTIFIER and
252 * VENDOR_SPECIFIC_IDENTIFIER_EXTENTION
254 target_parse_naa_6h_vendor_specific(dev
, &buf
[off
]);
261 * T10 Vendor Identifier Page, see spc4r17 section 7.7.3.4
263 id_len
= 8; /* For Vendor field */
264 prod_len
= 4; /* For VPD Header */
265 prod_len
+= 8; /* For Vendor field */
266 prod_len
+= strlen(prod
);
267 prod_len
++; /* For : */
269 if (dev
->se_sub_dev
->su_dev_flags
&
270 SDF_EMULATED_VPD_UNIT_SERIAL
) {
272 strlen(&dev
->se_sub_dev
->t10_wwn
.unit_serial
[0]);
273 unit_serial_len
++; /* For NULL Terminator */
275 if ((len
+ (id_len
+ 4) +
276 (prod_len
+ unit_serial_len
)) >
278 len
+= (prod_len
+ unit_serial_len
);
281 id_len
+= sprintf((unsigned char *)&buf
[off
+12],
283 &dev
->se_sub_dev
->t10_wwn
.unit_serial
[0]);
285 buf
[off
] = 0x2; /* ASCII */
286 buf
[off
+1] = 0x1; /* T10 Vendor ID */
288 memcpy((unsigned char *)&buf
[off
+4], "LIO-ORG", 8);
289 /* Extra Byte for NULL Terminator */
291 /* Identifier Length */
293 /* Header size for Designation descriptor */
297 * struct se_port is only set for INQUIRY VPD=1 through $FABRIC_MOD
302 struct t10_alua_lu_gp
*lu_gp
;
303 u32 padding
, scsi_name_len
;
310 * Relative target port identifer, see spc4r17
313 * Get the PROTOCOL IDENTIFIER as defined by spc4r17
314 * section 7.5.1 Table 362
316 if (((len
+ 4) + 8) > cmd
->data_length
) {
321 (tpg
->se_tpg_tfo
->get_fabric_proto_ident(tpg
) << 4);
322 buf
[off
++] |= 0x1; /* CODE SET == Binary */
323 buf
[off
] = 0x80; /* Set PIV=1 */
324 /* Set ASSOCIATION == target port: 01b */
326 /* DESIGNATOR TYPE == Relative target port identifer */
328 off
++; /* Skip over Reserved */
329 buf
[off
++] = 4; /* DESIGNATOR LENGTH */
330 /* Skip over Obsolete field in RTPI payload
333 buf
[off
++] = ((port
->sep_rtpi
>> 8) & 0xff);
334 buf
[off
++] = (port
->sep_rtpi
& 0xff);
335 len
+= 8; /* Header size + Designation descriptor */
337 * Target port group identifier, see spc4r17
340 * Get the PROTOCOL IDENTIFIER as defined by spc4r17
341 * section 7.5.1 Table 362
344 if (dev
->se_sub_dev
->t10_alua
.alua_type
!=
346 goto check_scsi_name
;
348 if (((len
+ 4) + 8) > cmd
->data_length
) {
352 tg_pt_gp_mem
= port
->sep_alua_tg_pt_gp_mem
;
356 spin_lock(&tg_pt_gp_mem
->tg_pt_gp_mem_lock
);
357 tg_pt_gp
= tg_pt_gp_mem
->tg_pt_gp
;
359 spin_unlock(&tg_pt_gp_mem
->tg_pt_gp_mem_lock
);
362 tg_pt_gp_id
= tg_pt_gp
->tg_pt_gp_id
;
363 spin_unlock(&tg_pt_gp_mem
->tg_pt_gp_mem_lock
);
366 (tpg
->se_tpg_tfo
->get_fabric_proto_ident(tpg
) << 4);
367 buf
[off
++] |= 0x1; /* CODE SET == Binary */
368 buf
[off
] = 0x80; /* Set PIV=1 */
369 /* Set ASSOCIATION == target port: 01b */
371 /* DESIGNATOR TYPE == Target port group identifier */
373 off
++; /* Skip over Reserved */
374 buf
[off
++] = 4; /* DESIGNATOR LENGTH */
375 off
+= 2; /* Skip over Reserved Field */
376 buf
[off
++] = ((tg_pt_gp_id
>> 8) & 0xff);
377 buf
[off
++] = (tg_pt_gp_id
& 0xff);
378 len
+= 8; /* Header size + Designation descriptor */
380 * Logical Unit Group identifier, see spc4r17
384 if (((len
+ 4) + 8) > cmd
->data_length
) {
386 goto check_scsi_name
;
388 lu_gp_mem
= dev
->dev_alua_lu_gp_mem
;
390 goto check_scsi_name
;
392 spin_lock(&lu_gp_mem
->lu_gp_mem_lock
);
393 lu_gp
= lu_gp_mem
->lu_gp
;
395 spin_unlock(&lu_gp_mem
->lu_gp_mem_lock
);
396 goto check_scsi_name
;
398 lu_gp_id
= lu_gp
->lu_gp_id
;
399 spin_unlock(&lu_gp_mem
->lu_gp_mem_lock
);
401 buf
[off
++] |= 0x1; /* CODE SET == Binary */
402 /* DESIGNATOR TYPE == Logical Unit Group identifier */
404 off
++; /* Skip over Reserved */
405 buf
[off
++] = 4; /* DESIGNATOR LENGTH */
406 off
+= 2; /* Skip over Reserved Field */
407 buf
[off
++] = ((lu_gp_id
>> 8) & 0xff);
408 buf
[off
++] = (lu_gp_id
& 0xff);
409 len
+= 8; /* Header size + Designation descriptor */
411 * SCSI name string designator, see spc4r17
414 * Get the PROTOCOL IDENTIFIER as defined by spc4r17
415 * section 7.5.1 Table 362
418 scsi_name_len
= strlen(tpg
->se_tpg_tfo
->tpg_get_wwn(tpg
));
419 /* UTF-8 ",t,0x<16-bit TPGT>" + NULL Terminator */
421 /* Check for 4-byte padding */
422 padding
= ((-scsi_name_len
) & 3);
424 scsi_name_len
+= padding
;
425 /* Header size + Designation descriptor */
428 if (((len
+ 4) + scsi_name_len
) > cmd
->data_length
) {
429 len
+= scsi_name_len
;
433 (tpg
->se_tpg_tfo
->get_fabric_proto_ident(tpg
) << 4);
434 buf
[off
++] |= 0x3; /* CODE SET == UTF-8 */
435 buf
[off
] = 0x80; /* Set PIV=1 */
436 /* Set ASSOCIATION == target port: 01b */
438 /* DESIGNATOR TYPE == SCSI name string */
440 off
+= 2; /* Skip over Reserved and length */
442 * SCSI name string identifer containing, $FABRIC_MOD
443 * dependent information. For LIO-Target and iSCSI
444 * Target Port, this means "<iSCSI name>,t,0x<TPGT> in
447 tpgt
= tpg
->se_tpg_tfo
->tpg_get_tag(tpg
);
448 scsi_name_len
= sprintf(&buf
[off
], "%s,t,0x%04x",
449 tpg
->se_tpg_tfo
->tpg_get_wwn(tpg
), tpgt
);
450 scsi_name_len
+= 1 /* Include NULL terminator */;
452 * The null-terminated, null-padded (see 4.4.2) SCSI
453 * NAME STRING field contains a UTF-8 format string.
454 * The number of bytes in the SCSI NAME STRING field
455 * (i.e., the value in the DESIGNATOR LENGTH field)
456 * shall be no larger than 256 and shall be a multiple
460 scsi_name_len
+= padding
;
462 buf
[off
-1] = scsi_name_len
;
463 off
+= scsi_name_len
;
464 /* Header size + Designation descriptor */
465 len
+= (scsi_name_len
+ 4);
468 buf
[2] = ((len
>> 8) & 0xff);
469 buf
[3] = (len
& 0xff); /* Page Length for VPD 0x83 */
473 /* Extended INQUIRY Data VPD Page */
475 target_emulate_evpd_86(struct se_cmd
*cmd
, unsigned char *buf
)
477 if (cmd
->data_length
< 60)
481 /* Set HEADSUP, ORDSUP, SIMPSUP */
484 /* If WriteCache emulation is enabled, set V_SUP */
485 if (cmd
->se_dev
->se_sub_dev
->se_dev_attrib
.emulate_write_cache
> 0)
490 /* Block Limits VPD page */
492 target_emulate_evpd_b0(struct se_cmd
*cmd
, unsigned char *buf
)
494 struct se_device
*dev
= cmd
->se_dev
;
498 * Following sbc3r22 section 6.5.3 Block Limits VPD page, when
499 * emulate_tpu=1 or emulate_tpws=1 we will be expect a
500 * different page length for Thin Provisioning.
502 if (dev
->se_sub_dev
->se_dev_attrib
.emulate_tpu
|| dev
->se_sub_dev
->se_dev_attrib
.emulate_tpws
)
505 if (cmd
->data_length
< (0x10 + 4)) {
506 pr_debug("Received data_length: %u"
507 " too small for EVPD 0xb0\n",
512 if (have_tp
&& cmd
->data_length
< (0x3c + 4)) {
513 pr_debug("Received data_length: %u"
514 " too small for TPE=1 EVPD 0xb0\n",
519 buf
[0] = dev
->transport
->get_device_type(dev
);
520 buf
[3] = have_tp
? 0x3c : 0x10;
526 * Set OPTIMAL TRANSFER LENGTH GRANULARITY
528 put_unaligned_be16(1, &buf
[6]);
531 * Set MAXIMUM TRANSFER LENGTH
533 put_unaligned_be32(dev
->se_sub_dev
->se_dev_attrib
.max_sectors
, &buf
[8]);
536 * Set OPTIMAL TRANSFER LENGTH
538 put_unaligned_be32(dev
->se_sub_dev
->se_dev_attrib
.optimal_sectors
, &buf
[12]);
541 * Exit now if we don't support TP or the initiator sent a too
544 if (!have_tp
|| cmd
->data_length
< (0x3c + 4))
548 * Set MAXIMUM UNMAP LBA COUNT
550 put_unaligned_be32(dev
->se_sub_dev
->se_dev_attrib
.max_unmap_lba_count
, &buf
[20]);
553 * Set MAXIMUM UNMAP BLOCK DESCRIPTOR COUNT
555 put_unaligned_be32(dev
->se_sub_dev
->se_dev_attrib
.max_unmap_block_desc_count
,
559 * Set OPTIMAL UNMAP GRANULARITY
561 put_unaligned_be32(dev
->se_sub_dev
->se_dev_attrib
.unmap_granularity
, &buf
[28]);
564 * UNMAP GRANULARITY ALIGNMENT
566 put_unaligned_be32(dev
->se_sub_dev
->se_dev_attrib
.unmap_granularity_alignment
,
568 if (dev
->se_sub_dev
->se_dev_attrib
.unmap_granularity_alignment
!= 0)
569 buf
[32] |= 0x80; /* Set the UGAVALID bit */
574 /* Block Device Characteristics VPD page */
576 target_emulate_evpd_b1(struct se_cmd
*cmd
, unsigned char *buf
)
578 struct se_device
*dev
= cmd
->se_dev
;
580 buf
[0] = dev
->transport
->get_device_type(dev
);
583 if (cmd
->data_length
>= 5 &&
584 dev
->se_sub_dev
->se_dev_attrib
.is_nonrot
)
590 /* Thin Provisioning VPD */
592 target_emulate_evpd_b2(struct se_cmd
*cmd
, unsigned char *buf
)
594 struct se_device
*dev
= cmd
->se_dev
;
597 * From sbc3r22 section 6.5.4 Thin Provisioning VPD page:
599 * The PAGE LENGTH field is defined in SPC-4. If the DP bit is set to
600 * zero, then the page length shall be set to 0004h. If the DP bit
601 * is set to one, then the page length shall be set to the value
602 * defined in table 162.
604 buf
[0] = dev
->transport
->get_device_type(dev
);
607 * Set Hardcoded length mentioned above for DP=0
609 put_unaligned_be16(0x0004, &buf
[2]);
612 * The THRESHOLD EXPONENT field indicates the threshold set size in
613 * LBAs as a power of 2 (i.e., the threshold set size is equal to
614 * 2(threshold exponent)).
616 * Note that this is currently set to 0x00 as mkp says it will be
617 * changing again. We can enable this once it has settled in T10
618 * and is actually used by Linux/SCSI ML code.
623 * A TPU bit set to one indicates that the device server supports
624 * the UNMAP command (see 5.25). A TPU bit set to zero indicates
625 * that the device server does not support the UNMAP command.
627 if (dev
->se_sub_dev
->se_dev_attrib
.emulate_tpu
!= 0)
631 * A TPWS bit set to one indicates that the device server supports
632 * the use of the WRITE SAME (16) command (see 5.42) to unmap LBAs.
633 * A TPWS bit set to zero indicates that the device server does not
634 * support the use of the WRITE SAME (16) command to unmap LBAs.
636 if (dev
->se_sub_dev
->se_dev_attrib
.emulate_tpws
!= 0)
643 target_emulate_evpd_00(struct se_cmd
*cmd
, unsigned char *buf
);
647 int (*emulate
)(struct se_cmd
*, unsigned char *);
648 } evpd_handlers
[] = {
649 { .page
= 0x00, .emulate
= target_emulate_evpd_00
},
650 { .page
= 0x80, .emulate
= target_emulate_evpd_80
},
651 { .page
= 0x83, .emulate
= target_emulate_evpd_83
},
652 { .page
= 0x86, .emulate
= target_emulate_evpd_86
},
653 { .page
= 0xb0, .emulate
= target_emulate_evpd_b0
},
654 { .page
= 0xb1, .emulate
= target_emulate_evpd_b1
},
655 { .page
= 0xb2, .emulate
= target_emulate_evpd_b2
},
658 /* supported vital product data pages */
660 target_emulate_evpd_00(struct se_cmd
*cmd
, unsigned char *buf
)
664 if (cmd
->data_length
< 8)
667 * Only report the INQUIRY EVPD=1 pages after a valid NAA
668 * Registered Extended LUN WWN has been set via ConfigFS
669 * during device creation/restart.
671 if (cmd
->se_dev
->se_sub_dev
->su_dev_flags
&
672 SDF_EMULATED_VPD_UNIT_SERIAL
) {
673 buf
[3] = ARRAY_SIZE(evpd_handlers
);
674 for (p
= 0; p
< min_t(int, ARRAY_SIZE(evpd_handlers
),
675 cmd
->data_length
- 4); ++p
)
676 buf
[p
+ 4] = evpd_handlers
[p
].page
;
683 target_emulate_inquiry(struct se_cmd
*cmd
)
685 struct se_device
*dev
= cmd
->se_dev
;
687 unsigned char *cdb
= cmd
->t_task_cdb
;
691 return target_emulate_inquiry_std(cmd
);
694 * Make sure we at least have 4 bytes of INQUIRY response
695 * payload for 0x00 going back for EVPD=1. Note that 0x80
696 * and 0x83 will check for enough payload data length and
697 * jump to set_len: label when there is not enough inquiry EVPD
698 * payload length left for the next outgoing EVPD metadata
700 if (cmd
->data_length
< 4) {
701 pr_err("SCSI Inquiry payload length: %u"
702 " too small for EVPD=1\n", cmd
->data_length
);
706 buf
= transport_kmap_first_data_page(cmd
);
708 buf
[0] = dev
->transport
->get_device_type(dev
);
710 for (p
= 0; p
< ARRAY_SIZE(evpd_handlers
); ++p
)
711 if (cdb
[2] == evpd_handlers
[p
].page
) {
713 ret
= evpd_handlers
[p
].emulate(cmd
, buf
);
714 transport_kunmap_first_data_page(cmd
);
718 transport_kunmap_first_data_page(cmd
);
719 pr_err("Unknown VPD Code: 0x%02x\n", cdb
[2]);
724 target_emulate_readcapacity(struct se_cmd
*cmd
)
726 struct se_device
*dev
= cmd
->se_dev
;
728 unsigned long long blocks_long
= dev
->transport
->get_blocks(dev
);
731 if (blocks_long
>= 0x00000000ffffffff)
734 blocks
= (u32
)blocks_long
;
736 buf
= transport_kmap_first_data_page(cmd
);
738 buf
[0] = (blocks
>> 24) & 0xff;
739 buf
[1] = (blocks
>> 16) & 0xff;
740 buf
[2] = (blocks
>> 8) & 0xff;
741 buf
[3] = blocks
& 0xff;
742 buf
[4] = (dev
->se_sub_dev
->se_dev_attrib
.block_size
>> 24) & 0xff;
743 buf
[5] = (dev
->se_sub_dev
->se_dev_attrib
.block_size
>> 16) & 0xff;
744 buf
[6] = (dev
->se_sub_dev
->se_dev_attrib
.block_size
>> 8) & 0xff;
745 buf
[7] = dev
->se_sub_dev
->se_dev_attrib
.block_size
& 0xff;
747 * Set max 32-bit blocks to signal SERVICE ACTION READ_CAPACITY_16
749 if (dev
->se_sub_dev
->se_dev_attrib
.emulate_tpu
|| dev
->se_sub_dev
->se_dev_attrib
.emulate_tpws
)
750 put_unaligned_be32(0xFFFFFFFF, &buf
[0]);
752 transport_kunmap_first_data_page(cmd
);
758 target_emulate_readcapacity_16(struct se_cmd
*cmd
)
760 struct se_device
*dev
= cmd
->se_dev
;
762 unsigned long long blocks
= dev
->transport
->get_blocks(dev
);
764 buf
= transport_kmap_first_data_page(cmd
);
766 buf
[0] = (blocks
>> 56) & 0xff;
767 buf
[1] = (blocks
>> 48) & 0xff;
768 buf
[2] = (blocks
>> 40) & 0xff;
769 buf
[3] = (blocks
>> 32) & 0xff;
770 buf
[4] = (blocks
>> 24) & 0xff;
771 buf
[5] = (blocks
>> 16) & 0xff;
772 buf
[6] = (blocks
>> 8) & 0xff;
773 buf
[7] = blocks
& 0xff;
774 buf
[8] = (dev
->se_sub_dev
->se_dev_attrib
.block_size
>> 24) & 0xff;
775 buf
[9] = (dev
->se_sub_dev
->se_dev_attrib
.block_size
>> 16) & 0xff;
776 buf
[10] = (dev
->se_sub_dev
->se_dev_attrib
.block_size
>> 8) & 0xff;
777 buf
[11] = dev
->se_sub_dev
->se_dev_attrib
.block_size
& 0xff;
779 * Set Thin Provisioning Enable bit following sbc3r22 in section
780 * READ CAPACITY (16) byte 14 if emulate_tpu or emulate_tpws is enabled.
782 if (dev
->se_sub_dev
->se_dev_attrib
.emulate_tpu
|| dev
->se_sub_dev
->se_dev_attrib
.emulate_tpws
)
785 transport_kunmap_first_data_page(cmd
);
791 target_modesense_rwrecovery(unsigned char *p
)
800 target_modesense_control(struct se_device
*dev
, unsigned char *p
)
806 * From spc4r23, 7.4.7 Control mode page
808 * The QUEUE ALGORITHM MODIFIER field (see table 368) specifies
809 * restrictions on the algorithm used for reordering commands
810 * having the SIMPLE task attribute (see SAM-4).
812 * Table 368 -- QUEUE ALGORITHM MODIFIER field
814 * 0h Restricted reordering
815 * 1h Unrestricted reordering allowed
817 * 8h to Fh Vendor specific
819 * A value of zero in the QUEUE ALGORITHM MODIFIER field specifies that
820 * the device server shall order the processing sequence of commands
821 * having the SIMPLE task attribute such that data integrity is maintained
822 * for that I_T nexus (i.e., if the transmission of new SCSI transport protocol
823 * requests is halted at any time, the final value of all data observable
824 * on the medium shall be the same as if all the commands had been processed
825 * with the ORDERED task attribute).
827 * A value of one in the QUEUE ALGORITHM MODIFIER field specifies that the
828 * device server may reorder the processing sequence of commands having the
829 * SIMPLE task attribute in any manner. Any data integrity exposures related to
830 * command sequence order shall be explicitly handled by the application client
831 * through the selection of appropriate ommands and task attributes.
833 p
[3] = (dev
->se_sub_dev
->se_dev_attrib
.emulate_rest_reord
== 1) ? 0x00 : 0x10;
835 * From spc4r17, section 7.4.6 Control mode Page
837 * Unit Attention interlocks control (UN_INTLCK_CTRL) to code 00b
839 * 00b: The logical unit shall clear any unit attention condition
840 * reported in the same I_T_L_Q nexus transaction as a CHECK CONDITION
841 * status and shall not establish a unit attention condition when a com-
842 * mand is completed with BUSY, TASK SET FULL, or RESERVATION CONFLICT
845 * 10b: The logical unit shall not clear any unit attention condition
846 * reported in the same I_T_L_Q nexus transaction as a CHECK CONDITION
847 * status and shall not establish a unit attention condition when
848 * a command is completed with BUSY, TASK SET FULL, or RESERVATION
851 * 11b a The logical unit shall not clear any unit attention condition
852 * reported in the same I_T_L_Q nexus transaction as a CHECK CONDITION
853 * status and shall establish a unit attention condition for the
854 * initiator port associated with the I_T nexus on which the BUSY,
855 * TASK SET FULL, or RESERVATION CONFLICT status is being returned.
856 * Depending on the status, the additional sense code shall be set to
857 * PREVIOUS BUSY STATUS, PREVIOUS TASK SET FULL STATUS, or PREVIOUS
858 * RESERVATION CONFLICT STATUS. Until it is cleared by a REQUEST SENSE
859 * command, a unit attention condition shall be established only once
860 * for a BUSY, TASK SET FULL, or RESERVATION CONFLICT status regardless
861 * to the number of commands completed with one of those status codes.
863 p
[4] = (dev
->se_sub_dev
->se_dev_attrib
.emulate_ua_intlck_ctrl
== 2) ? 0x30 :
864 (dev
->se_sub_dev
->se_dev_attrib
.emulate_ua_intlck_ctrl
== 1) ? 0x20 : 0x00;
866 * From spc4r17, section 7.4.6 Control mode Page
868 * Task Aborted Status (TAS) bit set to zero.
870 * A task aborted status (TAS) bit set to zero specifies that aborted
871 * tasks shall be terminated by the device server without any response
872 * to the application client. A TAS bit set to one specifies that tasks
873 * aborted by the actions of an I_T nexus other than the I_T nexus on
874 * which the command was received shall be completed with TASK ABORTED
875 * status (see SAM-4).
877 p
[5] = (dev
->se_sub_dev
->se_dev_attrib
.emulate_tas
) ? 0x40 : 0x00;
886 target_modesense_caching(struct se_device
*dev
, unsigned char *p
)
890 if (dev
->se_sub_dev
->se_dev_attrib
.emulate_write_cache
> 0)
891 p
[2] = 0x04; /* Write Cache Enable */
892 p
[12] = 0x20; /* Disabled Read Ahead */
898 target_modesense_write_protect(unsigned char *buf
, int type
)
901 * I believe that the WP bit (bit 7) in the mode header is the same for
908 buf
[0] |= 0x80; /* WP bit */
914 target_modesense_dpofua(unsigned char *buf
, int type
)
918 buf
[0] |= 0x10; /* DPOFUA bit */
926 target_emulate_modesense(struct se_cmd
*cmd
, int ten
)
928 struct se_device
*dev
= cmd
->se_dev
;
929 char *cdb
= cmd
->t_task_cdb
;
931 int type
= dev
->transport
->get_device_type(dev
);
932 int offset
= (ten
) ? 8 : 4;
934 unsigned char buf
[SE_MODE_PAGE_BUF
];
936 memset(buf
, 0, SE_MODE_PAGE_BUF
);
938 switch (cdb
[2] & 0x3f) {
940 length
= target_modesense_rwrecovery(&buf
[offset
]);
943 length
= target_modesense_caching(dev
, &buf
[offset
]);
946 length
= target_modesense_control(dev
, &buf
[offset
]);
949 length
= target_modesense_rwrecovery(&buf
[offset
]);
950 length
+= target_modesense_caching(dev
, &buf
[offset
+length
]);
951 length
+= target_modesense_control(dev
, &buf
[offset
+length
]);
954 pr_err("MODE SENSE: unimplemented page/subpage: 0x%02x/0x%02x\n",
955 cdb
[2] & 0x3f, cdb
[3]);
956 return PYX_TRANSPORT_UNKNOWN_MODE_PAGE
;
962 buf
[0] = (offset
>> 8) & 0xff;
963 buf
[1] = offset
& 0xff;
965 if ((cmd
->se_lun
->lun_access
& TRANSPORT_LUNFLAGS_READ_ONLY
) ||
967 (cmd
->se_deve
->lun_flags
& TRANSPORT_LUNFLAGS_READ_ONLY
)))
968 target_modesense_write_protect(&buf
[3], type
);
970 if ((dev
->se_sub_dev
->se_dev_attrib
.emulate_write_cache
> 0) &&
971 (dev
->se_sub_dev
->se_dev_attrib
.emulate_fua_write
> 0))
972 target_modesense_dpofua(&buf
[3], type
);
974 if ((offset
+ 2) > cmd
->data_length
)
975 offset
= cmd
->data_length
;
979 buf
[0] = offset
& 0xff;
981 if ((cmd
->se_lun
->lun_access
& TRANSPORT_LUNFLAGS_READ_ONLY
) ||
983 (cmd
->se_deve
->lun_flags
& TRANSPORT_LUNFLAGS_READ_ONLY
)))
984 target_modesense_write_protect(&buf
[2], type
);
986 if ((dev
->se_sub_dev
->se_dev_attrib
.emulate_write_cache
> 0) &&
987 (dev
->se_sub_dev
->se_dev_attrib
.emulate_fua_write
> 0))
988 target_modesense_dpofua(&buf
[2], type
);
990 if ((offset
+ 1) > cmd
->data_length
)
991 offset
= cmd
->data_length
;
994 rbuf
= transport_kmap_first_data_page(cmd
);
995 memcpy(rbuf
, buf
, offset
);
996 transport_kunmap_first_data_page(cmd
);
1002 target_emulate_request_sense(struct se_cmd
*cmd
)
1004 unsigned char *cdb
= cmd
->t_task_cdb
;
1006 u8 ua_asc
= 0, ua_ascq
= 0;
1009 if (cdb
[1] & 0x01) {
1010 pr_err("REQUEST_SENSE description emulation not"
1012 return PYX_TRANSPORT_INVALID_CDB_FIELD
;
1015 buf
= transport_kmap_first_data_page(cmd
);
1017 if (!core_scsi3_ua_clear_for_request_sense(cmd
, &ua_asc
, &ua_ascq
)) {
1019 * CURRENT ERROR, UNIT ATTENTION
1022 buf
[SPC_SENSE_KEY_OFFSET
] = UNIT_ATTENTION
;
1024 * Make sure request data length is enough for additional
1027 if (cmd
->data_length
<= 18) {
1033 * The Additional Sense Code (ASC) from the UNIT ATTENTION
1035 buf
[SPC_ASC_KEY_OFFSET
] = ua_asc
;
1036 buf
[SPC_ASCQ_KEY_OFFSET
] = ua_ascq
;
1040 * CURRENT ERROR, NO SENSE
1043 buf
[SPC_SENSE_KEY_OFFSET
] = NO_SENSE
;
1045 * Make sure request data length is enough for additional
1048 if (cmd
->data_length
<= 18) {
1054 * NO ADDITIONAL SENSE INFORMATION
1056 buf
[SPC_ASC_KEY_OFFSET
] = 0x00;
1061 transport_kunmap_first_data_page(cmd
);
1067 * Used for TCM/IBLOCK and TCM/FILEIO for block/blk-lib.c level discard support.
1068 * Note this is not used for TCM/pSCSI passthrough
1071 target_emulate_unmap(struct se_task
*task
)
1073 struct se_cmd
*cmd
= task
->task_se_cmd
;
1074 struct se_device
*dev
= cmd
->se_dev
;
1075 unsigned char *buf
, *ptr
= NULL
;
1076 unsigned char *cdb
= &cmd
->t_task_cdb
[0];
1078 unsigned int size
= cmd
->data_length
, range
;
1079 int ret
= 0, offset
;
1080 unsigned short dl
, bd_dl
;
1082 /* First UNMAP block descriptor starts at 8 byte offset */
1085 dl
= get_unaligned_be16(&cdb
[0]);
1086 bd_dl
= get_unaligned_be16(&cdb
[2]);
1088 buf
= transport_kmap_first_data_page(cmd
);
1091 pr_debug("UNMAP: Sub: %s Using dl: %hu bd_dl: %hu size: %hu"
1092 " ptr: %p\n", dev
->transport
->name
, dl
, bd_dl
, size
, ptr
);
1095 lba
= get_unaligned_be64(&ptr
[0]);
1096 range
= get_unaligned_be32(&ptr
[8]);
1097 pr_debug("UNMAP: Using lba: %llu and range: %u\n",
1098 (unsigned long long)lba
, range
);
1100 ret
= dev
->transport
->do_discard(dev
, lba
, range
);
1102 pr_err("blkdev_issue_discard() failed: %d\n",
1112 transport_kunmap_first_data_page(cmd
);
1118 * Used for TCM/IBLOCK and TCM/FILEIO for block/blk-lib.c level discard support.
1119 * Note this is not used for TCM/pSCSI passthrough
1122 target_emulate_write_same(struct se_task
*task
, u32 num_blocks
)
1124 struct se_cmd
*cmd
= task
->task_se_cmd
;
1125 struct se_device
*dev
= cmd
->se_dev
;
1127 sector_t lba
= cmd
->t_task_lba
;
1130 * Use the explicit range when non zero is supplied, otherwise calculate
1131 * the remaining range based on ->get_blocks() - starting LBA.
1133 if (num_blocks
!= 0)
1136 range
= (dev
->transport
->get_blocks(dev
) - lba
);
1138 pr_debug("WRITE_SAME UNMAP: LBA: %llu Range: %llu\n",
1139 (unsigned long long)lba
, (unsigned long long)range
);
1141 ret
= dev
->transport
->do_discard(dev
, lba
, range
);
1143 pr_debug("blkdev_issue_discard() failed for WRITE_SAME\n");
1151 transport_emulate_control_cdb(struct se_task
*task
)
1153 struct se_cmd
*cmd
= task
->task_se_cmd
;
1154 struct se_device
*dev
= cmd
->se_dev
;
1155 unsigned short service_action
;
1158 switch (cmd
->t_task_cdb
[0]) {
1160 ret
= target_emulate_inquiry(cmd
);
1163 ret
= target_emulate_readcapacity(cmd
);
1166 ret
= target_emulate_modesense(cmd
, 0);
1169 ret
= target_emulate_modesense(cmd
, 1);
1171 case SERVICE_ACTION_IN
:
1172 switch (cmd
->t_task_cdb
[1] & 0x1f) {
1173 case SAI_READ_CAPACITY_16
:
1174 ret
= target_emulate_readcapacity_16(cmd
);
1177 pr_err("Unsupported SA: 0x%02x\n",
1178 cmd
->t_task_cdb
[1] & 0x1f);
1179 return PYX_TRANSPORT_UNKNOWN_SAM_OPCODE
;
1183 ret
= target_emulate_request_sense(cmd
);
1186 if (!dev
->transport
->do_discard
) {
1187 pr_err("UNMAP emulation not supported for: %s\n",
1188 dev
->transport
->name
);
1189 return PYX_TRANSPORT_UNKNOWN_SAM_OPCODE
;
1191 ret
= target_emulate_unmap(task
);
1194 if (!dev
->transport
->do_discard
) {
1195 pr_err("WRITE_SAME emulation not supported"
1196 " for: %s\n", dev
->transport
->name
);
1197 return PYX_TRANSPORT_UNKNOWN_SAM_OPCODE
;
1199 ret
= target_emulate_write_same(task
,
1200 get_unaligned_be16(&cmd
->t_task_cdb
[7]));
1203 if (!dev
->transport
->do_discard
) {
1204 pr_err("WRITE_SAME_16 emulation not supported"
1205 " for: %s\n", dev
->transport
->name
);
1206 return PYX_TRANSPORT_UNKNOWN_SAM_OPCODE
;
1208 ret
= target_emulate_write_same(task
,
1209 get_unaligned_be32(&cmd
->t_task_cdb
[10]));
1211 case VARIABLE_LENGTH_CMD
:
1213 get_unaligned_be16(&cmd
->t_task_cdb
[8]);
1214 switch (service_action
) {
1216 if (!dev
->transport
->do_discard
) {
1217 pr_err("WRITE_SAME_32 SA emulation not"
1218 " supported for: %s\n",
1219 dev
->transport
->name
);
1220 return PYX_TRANSPORT_UNKNOWN_SAM_OPCODE
;
1222 ret
= target_emulate_write_same(task
,
1223 get_unaligned_be32(&cmd
->t_task_cdb
[28]));
1226 pr_err("Unsupported VARIABLE_LENGTH_CMD SA:"
1227 " 0x%02x\n", service_action
);
1231 case SYNCHRONIZE_CACHE
:
1232 case 0x91: /* SYNCHRONIZE_CACHE_16: */
1233 if (!dev
->transport
->do_sync_cache
) {
1234 pr_err("SYNCHRONIZE_CACHE emulation not supported"
1235 " for: %s\n", dev
->transport
->name
);
1236 return PYX_TRANSPORT_UNKNOWN_SAM_OPCODE
;
1238 dev
->transport
->do_sync_cache(task
);
1240 case ALLOW_MEDIUM_REMOVAL
:
1246 case TEST_UNIT_READY
:
1248 case WRITE_FILEMARKS
:
1251 pr_err("Unsupported SCSI Opcode: 0x%02x for %s\n",
1252 cmd
->t_task_cdb
[0], dev
->transport
->name
);
1253 return PYX_TRANSPORT_UNKNOWN_SAM_OPCODE
;
1259 * Handle the successful completion here unless a caller
1260 * has explictly requested an asychronous completion.
1262 if (!(cmd
->se_cmd_flags
& SCF_EMULATE_CDB_ASYNC
)) {
1263 task
->task_scsi_status
= GOOD
;
1264 transport_complete_task(task
, 1);
1267 return PYX_TRANSPORT_SENT_TO_TRANSPORT
;
1271 * Write a CDB into @cdb that is based on the one the intiator sent us,
1272 * but updated to only cover the sectors that the current task handles.
1274 void target_get_task_cdb(struct se_task
*task
, unsigned char *cdb
)
1276 struct se_cmd
*cmd
= task
->task_se_cmd
;
1277 unsigned int cdb_len
= scsi_command_size(cmd
->t_task_cdb
);
1279 memcpy(cdb
, cmd
->t_task_cdb
, cdb_len
);
1280 if (cmd
->se_cmd_flags
& SCF_SCSI_DATA_SG_IO_CDB
) {
1281 unsigned long long lba
= task
->task_lba
;
1282 u32 sectors
= task
->task_sectors
;
1286 /* 21-bit LBA and 8-bit sectors */
1287 cdb
[1] = (lba
>> 16) & 0x1f;
1288 cdb
[2] = (lba
>> 8) & 0xff;
1289 cdb
[3] = lba
& 0xff;
1290 cdb
[4] = sectors
& 0xff;
1293 /* 32-bit LBA and 16-bit sectors */
1294 put_unaligned_be32(lba
, &cdb
[2]);
1295 put_unaligned_be16(sectors
, &cdb
[7]);
1298 /* 32-bit LBA and 32-bit sectors */
1299 put_unaligned_be32(lba
, &cdb
[2]);
1300 put_unaligned_be32(sectors
, &cdb
[6]);
1303 /* 64-bit LBA and 32-bit sectors */
1304 put_unaligned_be64(lba
, &cdb
[2]);
1305 put_unaligned_be32(sectors
, &cdb
[10]);
1308 /* 64-bit LBA and 32-bit sectors, extended CDB */
1309 put_unaligned_be64(lba
, &cdb
[12]);
1310 put_unaligned_be32(sectors
, &cdb
[28]);
1317 EXPORT_SYMBOL(target_get_task_cdb
);