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 <asm/unaligned.h>
28 #include <scsi/scsi.h>
30 #include <target/target_core_base.h>
31 #include <target/target_core_transport.h>
32 #include <target/target_core_fabric_ops.h>
33 #include "target_core_ua.h"
36 target_fill_alua_data(struct se_port
*port
, unsigned char *buf
)
38 struct t10_alua_tg_pt_gp
*tg_pt_gp
;
39 struct t10_alua_tg_pt_gp_member
*tg_pt_gp_mem
;
42 * Set SCCS for MAINTENANCE_IN + REPORT_TARGET_PORT_GROUPS.
47 * Set TPGS field for explict and/or implict ALUA access type
50 * See spc4r17 section 6.4.2 Table 135
54 tg_pt_gp_mem
= port
->sep_alua_tg_pt_gp_mem
;
58 spin_lock(&tg_pt_gp_mem
->tg_pt_gp_mem_lock
);
59 tg_pt_gp
= tg_pt_gp_mem
->tg_pt_gp
;
61 buf
[5] |= tg_pt_gp
->tg_pt_gp_alua_access_type
;
62 spin_unlock(&tg_pt_gp_mem
->tg_pt_gp_mem_lock
);
66 target_emulate_inquiry_std(struct se_cmd
*cmd
)
68 struct se_lun
*lun
= cmd
->se_lun
;
69 struct se_device
*dev
= cmd
->se_dev
;
70 struct se_portal_group
*tpg
= lun
->lun_sep
->sep_tpg
;
74 * Make sure we at least have 6 bytes of INQUIRY response
75 * payload going back for EVPD=0
77 if (cmd
->data_length
< 6) {
78 pr_err("SCSI Inquiry payload length: %u"
79 " too small for EVPD=0\n", cmd
->data_length
);
83 buf
= transport_kmap_first_data_page(cmd
);
85 if (dev
== tpg
->tpg_virt_lun0
.lun_se_dev
) {
86 buf
[0] = 0x3f; /* Not connected */
88 buf
[0] = dev
->transport
->get_device_type(dev
);
89 if (buf
[0] == TYPE_TAPE
)
92 buf
[2] = dev
->transport
->get_device_rev(dev
);
95 * Enable SCCS and TPGS fields for Emulated ALUA
97 if (dev
->se_sub_dev
->t10_alua
.alua_type
== SPC3_ALUA_EMULATED
)
98 target_fill_alua_data(lun
->lun_sep
, buf
);
100 if (cmd
->data_length
< 8) {
101 buf
[4] = 1; /* Set additional length to 1 */
105 buf
[7] = 0x32; /* Sync=1 and CmdQue=1 */
108 * Do not include vendor, product, reversion info in INQUIRY
109 * response payload for cdbs with a small allocation length.
111 if (cmd
->data_length
< 36) {
112 buf
[4] = 3; /* Set additional length to 3 */
116 snprintf((unsigned char *)&buf
[8], 8, "LIO-ORG");
117 snprintf((unsigned char *)&buf
[16], 16, "%s",
118 &dev
->se_sub_dev
->t10_wwn
.model
[0]);
119 snprintf((unsigned char *)&buf
[32], 4, "%s",
120 &dev
->se_sub_dev
->t10_wwn
.revision
[0]);
121 buf
[4] = 31; /* Set additional length to 31 */
124 transport_kunmap_first_data_page(cmd
);
128 /* unit serial number */
130 target_emulate_evpd_80(struct se_cmd
*cmd
, unsigned char *buf
)
132 struct se_device
*dev
= cmd
->se_dev
;
135 if (dev
->se_sub_dev
->su_dev_flags
&
136 SDF_EMULATED_VPD_UNIT_SERIAL
) {
140 strlen(&dev
->se_sub_dev
->t10_wwn
.unit_serial
[0]);
141 unit_serial_len
++; /* For NULL Terminator */
143 if (((len
+ 4) + unit_serial_len
) > cmd
->data_length
) {
144 len
+= unit_serial_len
;
145 buf
[2] = ((len
>> 8) & 0xff);
146 buf
[3] = (len
& 0xff);
149 len
+= sprintf((unsigned char *)&buf
[4], "%s",
150 &dev
->se_sub_dev
->t10_wwn
.unit_serial
[0]);
151 len
++; /* Extra Byte for NULL Terminator */
158 target_parse_naa_6h_vendor_specific(struct se_device
*dev
, unsigned char *buf
)
160 unsigned char *p
= &dev
->se_sub_dev
->t10_wwn
.unit_serial
[0];
165 * Generate up to 36 bits of VENDOR SPECIFIC IDENTIFIER starting on
166 * byte 3 bit 3-0 for NAA IEEE Registered Extended DESIGNATOR field
167 * format, followed by 64 bits of VENDOR SPECIFIC IDENTIFIER EXTENSION
168 * to complete the payload. These are based from VPD=0x80 PRODUCT SERIAL
169 * NUMBER set via vpd_unit_serial in target_core_configfs.c to ensure
170 * per device uniqeness.
172 for (cnt
= 0; *p
&& cnt
< 13; p
++) {
173 int val
= hex_to_bin(*p
);
189 * Device identification VPD, for a complete list of
190 * DESIGNATOR TYPEs see spc4r17 Table 459.
193 target_emulate_evpd_83(struct se_cmd
*cmd
, unsigned char *buf
)
195 struct se_device
*dev
= cmd
->se_dev
;
196 struct se_lun
*lun
= cmd
->se_lun
;
197 struct se_port
*port
= NULL
;
198 struct se_portal_group
*tpg
= NULL
;
199 struct t10_alua_lu_gp_member
*lu_gp_mem
;
200 struct t10_alua_tg_pt_gp
*tg_pt_gp
;
201 struct t10_alua_tg_pt_gp_member
*tg_pt_gp_mem
;
202 unsigned char *prod
= &dev
->se_sub_dev
->t10_wwn
.model
[0];
204 u32 unit_serial_len
, off
= 0;
210 * NAA IEEE Registered Extended Assigned designator format, see
211 * spc4r17 section 7.7.3.6.5
213 * We depend upon a target_core_mod/ConfigFS provided
214 * /sys/kernel/config/target/core/$HBA/$DEV/wwn/vpd_unit_serial
215 * value in order to return the NAA id.
217 if (!(dev
->se_sub_dev
->su_dev_flags
& SDF_EMULATED_VPD_UNIT_SERIAL
))
218 goto check_t10_vend_desc
;
220 if (off
+ 20 > cmd
->data_length
)
221 goto check_t10_vend_desc
;
223 /* CODE SET == Binary */
226 /* Set ASSOCIATION == addressed logical unit: 0)b */
229 /* Identifier/Designator type == NAA identifier */
233 /* Identifier/Designator length */
237 * Start NAA IEEE Registered Extended Identifier/Designator
239 buf
[off
++] = (0x6 << 4);
242 * Use OpenFabrics IEEE Company ID: 00 14 05
246 buf
[off
] = (0x5 << 4);
249 * Return ConfigFS Unit Serial Number information for
250 * VENDOR_SPECIFIC_IDENTIFIER and
251 * VENDOR_SPECIFIC_IDENTIFIER_EXTENTION
253 target_parse_naa_6h_vendor_specific(dev
, &buf
[off
]);
260 * T10 Vendor Identifier Page, see spc4r17 section 7.7.3.4
262 id_len
= 8; /* For Vendor field */
263 prod_len
= 4; /* For VPD Header */
264 prod_len
+= 8; /* For Vendor field */
265 prod_len
+= strlen(prod
);
266 prod_len
++; /* For : */
268 if (dev
->se_sub_dev
->su_dev_flags
&
269 SDF_EMULATED_VPD_UNIT_SERIAL
) {
271 strlen(&dev
->se_sub_dev
->t10_wwn
.unit_serial
[0]);
272 unit_serial_len
++; /* For NULL Terminator */
274 if ((len
+ (id_len
+ 4) +
275 (prod_len
+ unit_serial_len
)) >
277 len
+= (prod_len
+ unit_serial_len
);
280 id_len
+= sprintf((unsigned char *)&buf
[off
+12],
282 &dev
->se_sub_dev
->t10_wwn
.unit_serial
[0]);
284 buf
[off
] = 0x2; /* ASCII */
285 buf
[off
+1] = 0x1; /* T10 Vendor ID */
287 memcpy((unsigned char *)&buf
[off
+4], "LIO-ORG", 8);
288 /* Extra Byte for NULL Terminator */
290 /* Identifier Length */
292 /* Header size for Designation descriptor */
296 * struct se_port is only set for INQUIRY VPD=1 through $FABRIC_MOD
301 struct t10_alua_lu_gp
*lu_gp
;
302 u32 padding
, scsi_name_len
;
309 * Relative target port identifer, see spc4r17
312 * Get the PROTOCOL IDENTIFIER as defined by spc4r17
313 * section 7.5.1 Table 362
315 if (((len
+ 4) + 8) > cmd
->data_length
) {
320 (tpg
->se_tpg_tfo
->get_fabric_proto_ident(tpg
) << 4);
321 buf
[off
++] |= 0x1; /* CODE SET == Binary */
322 buf
[off
] = 0x80; /* Set PIV=1 */
323 /* Set ASSOCIATION == target port: 01b */
325 /* DESIGNATOR TYPE == Relative target port identifer */
327 off
++; /* Skip over Reserved */
328 buf
[off
++] = 4; /* DESIGNATOR LENGTH */
329 /* Skip over Obsolete field in RTPI payload
332 buf
[off
++] = ((port
->sep_rtpi
>> 8) & 0xff);
333 buf
[off
++] = (port
->sep_rtpi
& 0xff);
334 len
+= 8; /* Header size + Designation descriptor */
336 * Target port group identifier, see spc4r17
339 * Get the PROTOCOL IDENTIFIER as defined by spc4r17
340 * section 7.5.1 Table 362
343 if (dev
->se_sub_dev
->t10_alua
.alua_type
!=
345 goto check_scsi_name
;
347 if (((len
+ 4) + 8) > cmd
->data_length
) {
351 tg_pt_gp_mem
= port
->sep_alua_tg_pt_gp_mem
;
355 spin_lock(&tg_pt_gp_mem
->tg_pt_gp_mem_lock
);
356 tg_pt_gp
= tg_pt_gp_mem
->tg_pt_gp
;
358 spin_unlock(&tg_pt_gp_mem
->tg_pt_gp_mem_lock
);
361 tg_pt_gp_id
= tg_pt_gp
->tg_pt_gp_id
;
362 spin_unlock(&tg_pt_gp_mem
->tg_pt_gp_mem_lock
);
365 (tpg
->se_tpg_tfo
->get_fabric_proto_ident(tpg
) << 4);
366 buf
[off
++] |= 0x1; /* CODE SET == Binary */
367 buf
[off
] = 0x80; /* Set PIV=1 */
368 /* Set ASSOCIATION == target port: 01b */
370 /* DESIGNATOR TYPE == Target port group identifier */
372 off
++; /* Skip over Reserved */
373 buf
[off
++] = 4; /* DESIGNATOR LENGTH */
374 off
+= 2; /* Skip over Reserved Field */
375 buf
[off
++] = ((tg_pt_gp_id
>> 8) & 0xff);
376 buf
[off
++] = (tg_pt_gp_id
& 0xff);
377 len
+= 8; /* Header size + Designation descriptor */
379 * Logical Unit Group identifier, see spc4r17
383 if (((len
+ 4) + 8) > cmd
->data_length
) {
385 goto check_scsi_name
;
387 lu_gp_mem
= dev
->dev_alua_lu_gp_mem
;
389 goto check_scsi_name
;
391 spin_lock(&lu_gp_mem
->lu_gp_mem_lock
);
392 lu_gp
= lu_gp_mem
->lu_gp
;
394 spin_unlock(&lu_gp_mem
->lu_gp_mem_lock
);
395 goto check_scsi_name
;
397 lu_gp_id
= lu_gp
->lu_gp_id
;
398 spin_unlock(&lu_gp_mem
->lu_gp_mem_lock
);
400 buf
[off
++] |= 0x1; /* CODE SET == Binary */
401 /* DESIGNATOR TYPE == Logical Unit Group identifier */
403 off
++; /* Skip over Reserved */
404 buf
[off
++] = 4; /* DESIGNATOR LENGTH */
405 off
+= 2; /* Skip over Reserved Field */
406 buf
[off
++] = ((lu_gp_id
>> 8) & 0xff);
407 buf
[off
++] = (lu_gp_id
& 0xff);
408 len
+= 8; /* Header size + Designation descriptor */
410 * SCSI name string designator, see spc4r17
413 * Get the PROTOCOL IDENTIFIER as defined by spc4r17
414 * section 7.5.1 Table 362
417 scsi_name_len
= strlen(tpg
->se_tpg_tfo
->tpg_get_wwn(tpg
));
418 /* UTF-8 ",t,0x<16-bit TPGT>" + NULL Terminator */
420 /* Check for 4-byte padding */
421 padding
= ((-scsi_name_len
) & 3);
423 scsi_name_len
+= padding
;
424 /* Header size + Designation descriptor */
427 if (((len
+ 4) + scsi_name_len
) > cmd
->data_length
) {
428 len
+= scsi_name_len
;
432 (tpg
->se_tpg_tfo
->get_fabric_proto_ident(tpg
) << 4);
433 buf
[off
++] |= 0x3; /* CODE SET == UTF-8 */
434 buf
[off
] = 0x80; /* Set PIV=1 */
435 /* Set ASSOCIATION == target port: 01b */
437 /* DESIGNATOR TYPE == SCSI name string */
439 off
+= 2; /* Skip over Reserved and length */
441 * SCSI name string identifer containing, $FABRIC_MOD
442 * dependent information. For LIO-Target and iSCSI
443 * Target Port, this means "<iSCSI name>,t,0x<TPGT> in
446 tpgt
= tpg
->se_tpg_tfo
->tpg_get_tag(tpg
);
447 scsi_name_len
= sprintf(&buf
[off
], "%s,t,0x%04x",
448 tpg
->se_tpg_tfo
->tpg_get_wwn(tpg
), tpgt
);
449 scsi_name_len
+= 1 /* Include NULL terminator */;
451 * The null-terminated, null-padded (see 4.4.2) SCSI
452 * NAME STRING field contains a UTF-8 format string.
453 * The number of bytes in the SCSI NAME STRING field
454 * (i.e., the value in the DESIGNATOR LENGTH field)
455 * shall be no larger than 256 and shall be a multiple
459 scsi_name_len
+= padding
;
461 buf
[off
-1] = scsi_name_len
;
462 off
+= scsi_name_len
;
463 /* Header size + Designation descriptor */
464 len
+= (scsi_name_len
+ 4);
467 buf
[2] = ((len
>> 8) & 0xff);
468 buf
[3] = (len
& 0xff); /* Page Length for VPD 0x83 */
472 /* Extended INQUIRY Data VPD Page */
474 target_emulate_evpd_86(struct se_cmd
*cmd
, unsigned char *buf
)
476 if (cmd
->data_length
< 60)
480 /* Set HEADSUP, ORDSUP, SIMPSUP */
483 /* If WriteCache emulation is enabled, set V_SUP */
484 if (cmd
->se_dev
->se_sub_dev
->se_dev_attrib
.emulate_write_cache
> 0)
489 /* Block Limits VPD page */
491 target_emulate_evpd_b0(struct se_cmd
*cmd
, unsigned char *buf
)
493 struct se_device
*dev
= cmd
->se_dev
;
497 * Following sbc3r22 section 6.5.3 Block Limits VPD page, when
498 * emulate_tpu=1 or emulate_tpws=1 we will be expect a
499 * different page length for Thin Provisioning.
501 if (dev
->se_sub_dev
->se_dev_attrib
.emulate_tpu
|| dev
->se_sub_dev
->se_dev_attrib
.emulate_tpws
)
504 if (cmd
->data_length
< (0x10 + 4)) {
505 pr_debug("Received data_length: %u"
506 " too small for EVPD 0xb0\n",
511 if (have_tp
&& cmd
->data_length
< (0x3c + 4)) {
512 pr_debug("Received data_length: %u"
513 " too small for TPE=1 EVPD 0xb0\n",
518 buf
[0] = dev
->transport
->get_device_type(dev
);
519 buf
[3] = have_tp
? 0x3c : 0x10;
525 * Set OPTIMAL TRANSFER LENGTH GRANULARITY
527 put_unaligned_be16(1, &buf
[6]);
530 * Set MAXIMUM TRANSFER LENGTH
532 put_unaligned_be32(dev
->se_sub_dev
->se_dev_attrib
.max_sectors
, &buf
[8]);
535 * Set OPTIMAL TRANSFER LENGTH
537 put_unaligned_be32(dev
->se_sub_dev
->se_dev_attrib
.optimal_sectors
, &buf
[12]);
540 * Exit now if we don't support TP or the initiator sent a too
543 if (!have_tp
|| cmd
->data_length
< (0x3c + 4))
547 * Set MAXIMUM UNMAP LBA COUNT
549 put_unaligned_be32(dev
->se_sub_dev
->se_dev_attrib
.max_unmap_lba_count
, &buf
[20]);
552 * Set MAXIMUM UNMAP BLOCK DESCRIPTOR COUNT
554 put_unaligned_be32(dev
->se_sub_dev
->se_dev_attrib
.max_unmap_block_desc_count
,
558 * Set OPTIMAL UNMAP GRANULARITY
560 put_unaligned_be32(dev
->se_sub_dev
->se_dev_attrib
.unmap_granularity
, &buf
[28]);
563 * UNMAP GRANULARITY ALIGNMENT
565 put_unaligned_be32(dev
->se_sub_dev
->se_dev_attrib
.unmap_granularity_alignment
,
567 if (dev
->se_sub_dev
->se_dev_attrib
.unmap_granularity_alignment
!= 0)
568 buf
[32] |= 0x80; /* Set the UGAVALID bit */
573 /* Block Device Characteristics VPD page */
575 target_emulate_evpd_b1(struct se_cmd
*cmd
, unsigned char *buf
)
577 struct se_device
*dev
= cmd
->se_dev
;
579 buf
[0] = dev
->transport
->get_device_type(dev
);
582 if (cmd
->data_length
>= 5 &&
583 dev
->se_sub_dev
->se_dev_attrib
.is_nonrot
)
589 /* Thin Provisioning VPD */
591 target_emulate_evpd_b2(struct se_cmd
*cmd
, unsigned char *buf
)
593 struct se_device
*dev
= cmd
->se_dev
;
596 * From sbc3r22 section 6.5.4 Thin Provisioning VPD page:
598 * The PAGE LENGTH field is defined in SPC-4. If the DP bit is set to
599 * zero, then the page length shall be set to 0004h. If the DP bit
600 * is set to one, then the page length shall be set to the value
601 * defined in table 162.
603 buf
[0] = dev
->transport
->get_device_type(dev
);
606 * Set Hardcoded length mentioned above for DP=0
608 put_unaligned_be16(0x0004, &buf
[2]);
611 * The THRESHOLD EXPONENT field indicates the threshold set size in
612 * LBAs as a power of 2 (i.e., the threshold set size is equal to
613 * 2(threshold exponent)).
615 * Note that this is currently set to 0x00 as mkp says it will be
616 * changing again. We can enable this once it has settled in T10
617 * and is actually used by Linux/SCSI ML code.
622 * A TPU bit set to one indicates that the device server supports
623 * the UNMAP command (see 5.25). A TPU bit set to zero indicates
624 * that the device server does not support the UNMAP command.
626 if (dev
->se_sub_dev
->se_dev_attrib
.emulate_tpu
!= 0)
630 * A TPWS bit set to one indicates that the device server supports
631 * the use of the WRITE SAME (16) command (see 5.42) to unmap LBAs.
632 * A TPWS bit set to zero indicates that the device server does not
633 * support the use of the WRITE SAME (16) command to unmap LBAs.
635 if (dev
->se_sub_dev
->se_dev_attrib
.emulate_tpws
!= 0)
642 target_emulate_evpd_00(struct se_cmd
*cmd
, unsigned char *buf
);
646 int (*emulate
)(struct se_cmd
*, unsigned char *);
647 } evpd_handlers
[] = {
648 { .page
= 0x00, .emulate
= target_emulate_evpd_00
},
649 { .page
= 0x80, .emulate
= target_emulate_evpd_80
},
650 { .page
= 0x83, .emulate
= target_emulate_evpd_83
},
651 { .page
= 0x86, .emulate
= target_emulate_evpd_86
},
652 { .page
= 0xb0, .emulate
= target_emulate_evpd_b0
},
653 { .page
= 0xb1, .emulate
= target_emulate_evpd_b1
},
654 { .page
= 0xb2, .emulate
= target_emulate_evpd_b2
},
657 /* supported vital product data pages */
659 target_emulate_evpd_00(struct se_cmd
*cmd
, unsigned char *buf
)
663 if (cmd
->data_length
< 8)
666 * Only report the INQUIRY EVPD=1 pages after a valid NAA
667 * Registered Extended LUN WWN has been set via ConfigFS
668 * during device creation/restart.
670 if (cmd
->se_dev
->se_sub_dev
->su_dev_flags
&
671 SDF_EMULATED_VPD_UNIT_SERIAL
) {
672 buf
[3] = ARRAY_SIZE(evpd_handlers
);
673 for (p
= 0; p
< min_t(int, ARRAY_SIZE(evpd_handlers
),
674 cmd
->data_length
- 4); ++p
)
675 buf
[p
+ 4] = evpd_handlers
[p
].page
;
682 target_emulate_inquiry(struct se_cmd
*cmd
)
684 struct se_device
*dev
= cmd
->se_dev
;
686 unsigned char *cdb
= cmd
->t_task_cdb
;
690 return target_emulate_inquiry_std(cmd
);
693 * Make sure we at least have 4 bytes of INQUIRY response
694 * payload for 0x00 going back for EVPD=1. Note that 0x80
695 * and 0x83 will check for enough payload data length and
696 * jump to set_len: label when there is not enough inquiry EVPD
697 * payload length left for the next outgoing EVPD metadata
699 if (cmd
->data_length
< 4) {
700 pr_err("SCSI Inquiry payload length: %u"
701 " too small for EVPD=1\n", cmd
->data_length
);
705 buf
= transport_kmap_first_data_page(cmd
);
707 buf
[0] = dev
->transport
->get_device_type(dev
);
709 for (p
= 0; p
< ARRAY_SIZE(evpd_handlers
); ++p
)
710 if (cdb
[2] == evpd_handlers
[p
].page
) {
712 ret
= evpd_handlers
[p
].emulate(cmd
, buf
);
713 transport_kunmap_first_data_page(cmd
);
717 transport_kunmap_first_data_page(cmd
);
718 pr_err("Unknown VPD Code: 0x%02x\n", cdb
[2]);
723 target_emulate_readcapacity(struct se_cmd
*cmd
)
725 struct se_device
*dev
= cmd
->se_dev
;
727 unsigned long long blocks_long
= dev
->transport
->get_blocks(dev
);
730 if (blocks_long
>= 0x00000000ffffffff)
733 blocks
= (u32
)blocks_long
;
735 buf
= transport_kmap_first_data_page(cmd
);
737 buf
[0] = (blocks
>> 24) & 0xff;
738 buf
[1] = (blocks
>> 16) & 0xff;
739 buf
[2] = (blocks
>> 8) & 0xff;
740 buf
[3] = blocks
& 0xff;
741 buf
[4] = (dev
->se_sub_dev
->se_dev_attrib
.block_size
>> 24) & 0xff;
742 buf
[5] = (dev
->se_sub_dev
->se_dev_attrib
.block_size
>> 16) & 0xff;
743 buf
[6] = (dev
->se_sub_dev
->se_dev_attrib
.block_size
>> 8) & 0xff;
744 buf
[7] = dev
->se_sub_dev
->se_dev_attrib
.block_size
& 0xff;
746 * Set max 32-bit blocks to signal SERVICE ACTION READ_CAPACITY_16
748 if (dev
->se_sub_dev
->se_dev_attrib
.emulate_tpu
|| dev
->se_sub_dev
->se_dev_attrib
.emulate_tpws
)
749 put_unaligned_be32(0xFFFFFFFF, &buf
[0]);
751 transport_kunmap_first_data_page(cmd
);
757 target_emulate_readcapacity_16(struct se_cmd
*cmd
)
759 struct se_device
*dev
= cmd
->se_dev
;
761 unsigned long long blocks
= dev
->transport
->get_blocks(dev
);
763 buf
= transport_kmap_first_data_page(cmd
);
765 buf
[0] = (blocks
>> 56) & 0xff;
766 buf
[1] = (blocks
>> 48) & 0xff;
767 buf
[2] = (blocks
>> 40) & 0xff;
768 buf
[3] = (blocks
>> 32) & 0xff;
769 buf
[4] = (blocks
>> 24) & 0xff;
770 buf
[5] = (blocks
>> 16) & 0xff;
771 buf
[6] = (blocks
>> 8) & 0xff;
772 buf
[7] = blocks
& 0xff;
773 buf
[8] = (dev
->se_sub_dev
->se_dev_attrib
.block_size
>> 24) & 0xff;
774 buf
[9] = (dev
->se_sub_dev
->se_dev_attrib
.block_size
>> 16) & 0xff;
775 buf
[10] = (dev
->se_sub_dev
->se_dev_attrib
.block_size
>> 8) & 0xff;
776 buf
[11] = dev
->se_sub_dev
->se_dev_attrib
.block_size
& 0xff;
778 * Set Thin Provisioning Enable bit following sbc3r22 in section
779 * READ CAPACITY (16) byte 14 if emulate_tpu or emulate_tpws is enabled.
781 if (dev
->se_sub_dev
->se_dev_attrib
.emulate_tpu
|| dev
->se_sub_dev
->se_dev_attrib
.emulate_tpws
)
784 transport_kunmap_first_data_page(cmd
);
790 target_modesense_rwrecovery(unsigned char *p
)
799 target_modesense_control(struct se_device
*dev
, unsigned char *p
)
805 * From spc4r23, 7.4.7 Control mode page
807 * The QUEUE ALGORITHM MODIFIER field (see table 368) specifies
808 * restrictions on the algorithm used for reordering commands
809 * having the SIMPLE task attribute (see SAM-4).
811 * Table 368 -- QUEUE ALGORITHM MODIFIER field
813 * 0h Restricted reordering
814 * 1h Unrestricted reordering allowed
816 * 8h to Fh Vendor specific
818 * A value of zero in the QUEUE ALGORITHM MODIFIER field specifies that
819 * the device server shall order the processing sequence of commands
820 * having the SIMPLE task attribute such that data integrity is maintained
821 * for that I_T nexus (i.e., if the transmission of new SCSI transport protocol
822 * requests is halted at any time, the final value of all data observable
823 * on the medium shall be the same as if all the commands had been processed
824 * with the ORDERED task attribute).
826 * A value of one in the QUEUE ALGORITHM MODIFIER field specifies that the
827 * device server may reorder the processing sequence of commands having the
828 * SIMPLE task attribute in any manner. Any data integrity exposures related to
829 * command sequence order shall be explicitly handled by the application client
830 * through the selection of appropriate ommands and task attributes.
832 p
[3] = (dev
->se_sub_dev
->se_dev_attrib
.emulate_rest_reord
== 1) ? 0x00 : 0x10;
834 * From spc4r17, section 7.4.6 Control mode Page
836 * Unit Attention interlocks control (UN_INTLCK_CTRL) to code 00b
838 * 00b: The logical unit shall clear any unit attention condition
839 * reported in the same I_T_L_Q nexus transaction as a CHECK CONDITION
840 * status and shall not establish a unit attention condition when a com-
841 * mand is completed with BUSY, TASK SET FULL, or RESERVATION CONFLICT
844 * 10b: The logical unit shall not clear any unit attention condition
845 * reported in the same I_T_L_Q nexus transaction as a CHECK CONDITION
846 * status and shall not establish a unit attention condition when
847 * a command is completed with BUSY, TASK SET FULL, or RESERVATION
850 * 11b a The logical unit shall not clear any unit attention condition
851 * reported in the same I_T_L_Q nexus transaction as a CHECK CONDITION
852 * status and shall establish a unit attention condition for the
853 * initiator port associated with the I_T nexus on which the BUSY,
854 * TASK SET FULL, or RESERVATION CONFLICT status is being returned.
855 * Depending on the status, the additional sense code shall be set to
856 * PREVIOUS BUSY STATUS, PREVIOUS TASK SET FULL STATUS, or PREVIOUS
857 * RESERVATION CONFLICT STATUS. Until it is cleared by a REQUEST SENSE
858 * command, a unit attention condition shall be established only once
859 * for a BUSY, TASK SET FULL, or RESERVATION CONFLICT status regardless
860 * to the number of commands completed with one of those status codes.
862 p
[4] = (dev
->se_sub_dev
->se_dev_attrib
.emulate_ua_intlck_ctrl
== 2) ? 0x30 :
863 (dev
->se_sub_dev
->se_dev_attrib
.emulate_ua_intlck_ctrl
== 1) ? 0x20 : 0x00;
865 * From spc4r17, section 7.4.6 Control mode Page
867 * Task Aborted Status (TAS) bit set to zero.
869 * A task aborted status (TAS) bit set to zero specifies that aborted
870 * tasks shall be terminated by the device server without any response
871 * to the application client. A TAS bit set to one specifies that tasks
872 * aborted by the actions of an I_T nexus other than the I_T nexus on
873 * which the command was received shall be completed with TASK ABORTED
874 * status (see SAM-4).
876 p
[5] = (dev
->se_sub_dev
->se_dev_attrib
.emulate_tas
) ? 0x40 : 0x00;
885 target_modesense_caching(struct se_device
*dev
, unsigned char *p
)
889 if (dev
->se_sub_dev
->se_dev_attrib
.emulate_write_cache
> 0)
890 p
[2] = 0x04; /* Write Cache Enable */
891 p
[12] = 0x20; /* Disabled Read Ahead */
897 target_modesense_write_protect(unsigned char *buf
, int type
)
900 * I believe that the WP bit (bit 7) in the mode header is the same for
907 buf
[0] |= 0x80; /* WP bit */
913 target_modesense_dpofua(unsigned char *buf
, int type
)
917 buf
[0] |= 0x10; /* DPOFUA bit */
925 target_emulate_modesense(struct se_cmd
*cmd
, int ten
)
927 struct se_device
*dev
= cmd
->se_dev
;
928 char *cdb
= cmd
->t_task_cdb
;
930 int type
= dev
->transport
->get_device_type(dev
);
931 int offset
= (ten
) ? 8 : 4;
933 unsigned char buf
[SE_MODE_PAGE_BUF
];
935 memset(buf
, 0, SE_MODE_PAGE_BUF
);
937 switch (cdb
[2] & 0x3f) {
939 length
= target_modesense_rwrecovery(&buf
[offset
]);
942 length
= target_modesense_caching(dev
, &buf
[offset
]);
945 length
= target_modesense_control(dev
, &buf
[offset
]);
948 length
= target_modesense_rwrecovery(&buf
[offset
]);
949 length
+= target_modesense_caching(dev
, &buf
[offset
+length
]);
950 length
+= target_modesense_control(dev
, &buf
[offset
+length
]);
953 pr_err("MODE SENSE: unimplemented page/subpage: 0x%02x/0x%02x\n",
954 cdb
[2] & 0x3f, cdb
[3]);
955 return PYX_TRANSPORT_UNKNOWN_MODE_PAGE
;
961 buf
[0] = (offset
>> 8) & 0xff;
962 buf
[1] = offset
& 0xff;
964 if ((cmd
->se_lun
->lun_access
& TRANSPORT_LUNFLAGS_READ_ONLY
) ||
966 (cmd
->se_deve
->lun_flags
& TRANSPORT_LUNFLAGS_READ_ONLY
)))
967 target_modesense_write_protect(&buf
[3], type
);
969 if ((dev
->se_sub_dev
->se_dev_attrib
.emulate_write_cache
> 0) &&
970 (dev
->se_sub_dev
->se_dev_attrib
.emulate_fua_write
> 0))
971 target_modesense_dpofua(&buf
[3], type
);
973 if ((offset
+ 2) > cmd
->data_length
)
974 offset
= cmd
->data_length
;
978 buf
[0] = offset
& 0xff;
980 if ((cmd
->se_lun
->lun_access
& TRANSPORT_LUNFLAGS_READ_ONLY
) ||
982 (cmd
->se_deve
->lun_flags
& TRANSPORT_LUNFLAGS_READ_ONLY
)))
983 target_modesense_write_protect(&buf
[2], type
);
985 if ((dev
->se_sub_dev
->se_dev_attrib
.emulate_write_cache
> 0) &&
986 (dev
->se_sub_dev
->se_dev_attrib
.emulate_fua_write
> 0))
987 target_modesense_dpofua(&buf
[2], type
);
989 if ((offset
+ 1) > cmd
->data_length
)
990 offset
= cmd
->data_length
;
993 rbuf
= transport_kmap_first_data_page(cmd
);
994 memcpy(rbuf
, buf
, offset
);
995 transport_kunmap_first_data_page(cmd
);
1001 target_emulate_request_sense(struct se_cmd
*cmd
)
1003 unsigned char *cdb
= cmd
->t_task_cdb
;
1005 u8 ua_asc
= 0, ua_ascq
= 0;
1008 if (cdb
[1] & 0x01) {
1009 pr_err("REQUEST_SENSE description emulation not"
1011 return PYX_TRANSPORT_INVALID_CDB_FIELD
;
1014 buf
= transport_kmap_first_data_page(cmd
);
1016 if (!core_scsi3_ua_clear_for_request_sense(cmd
, &ua_asc
, &ua_ascq
)) {
1018 * CURRENT ERROR, UNIT ATTENTION
1021 buf
[SPC_SENSE_KEY_OFFSET
] = UNIT_ATTENTION
;
1023 * Make sure request data length is enough for additional
1026 if (cmd
->data_length
<= 18) {
1032 * The Additional Sense Code (ASC) from the UNIT ATTENTION
1034 buf
[SPC_ASC_KEY_OFFSET
] = ua_asc
;
1035 buf
[SPC_ASCQ_KEY_OFFSET
] = ua_ascq
;
1039 * CURRENT ERROR, NO SENSE
1042 buf
[SPC_SENSE_KEY_OFFSET
] = NO_SENSE
;
1044 * Make sure request data length is enough for additional
1047 if (cmd
->data_length
<= 18) {
1053 * NO ADDITIONAL SENSE INFORMATION
1055 buf
[SPC_ASC_KEY_OFFSET
] = 0x00;
1060 transport_kunmap_first_data_page(cmd
);
1066 * Used for TCM/IBLOCK and TCM/FILEIO for block/blk-lib.c level discard support.
1067 * Note this is not used for TCM/pSCSI passthrough
1070 target_emulate_unmap(struct se_task
*task
)
1072 struct se_cmd
*cmd
= task
->task_se_cmd
;
1073 struct se_device
*dev
= cmd
->se_dev
;
1074 unsigned char *buf
, *ptr
= NULL
;
1075 unsigned char *cdb
= &cmd
->t_task_cdb
[0];
1077 unsigned int size
= cmd
->data_length
, range
;
1078 int ret
= 0, offset
;
1079 unsigned short dl
, bd_dl
;
1081 /* First UNMAP block descriptor starts at 8 byte offset */
1084 dl
= get_unaligned_be16(&cdb
[0]);
1085 bd_dl
= get_unaligned_be16(&cdb
[2]);
1087 buf
= transport_kmap_first_data_page(cmd
);
1090 pr_debug("UNMAP: Sub: %s Using dl: %hu bd_dl: %hu size: %hu"
1091 " ptr: %p\n", dev
->transport
->name
, dl
, bd_dl
, size
, ptr
);
1094 lba
= get_unaligned_be64(&ptr
[0]);
1095 range
= get_unaligned_be32(&ptr
[8]);
1096 pr_debug("UNMAP: Using lba: %llu and range: %u\n",
1097 (unsigned long long)lba
, range
);
1099 ret
= dev
->transport
->do_discard(dev
, lba
, range
);
1101 pr_err("blkdev_issue_discard() failed: %d\n",
1111 transport_kunmap_first_data_page(cmd
);
1117 * Used for TCM/IBLOCK and TCM/FILEIO for block/blk-lib.c level discard support.
1118 * Note this is not used for TCM/pSCSI passthrough
1121 target_emulate_write_same(struct se_task
*task
, u32 num_blocks
)
1123 struct se_cmd
*cmd
= task
->task_se_cmd
;
1124 struct se_device
*dev
= cmd
->se_dev
;
1126 sector_t lba
= cmd
->t_task_lba
;
1129 * Use the explicit range when non zero is supplied, otherwise calculate
1130 * the remaining range based on ->get_blocks() - starting LBA.
1132 if (num_blocks
!= 0)
1135 range
= (dev
->transport
->get_blocks(dev
) - lba
);
1137 pr_debug("WRITE_SAME UNMAP: LBA: %llu Range: %llu\n",
1138 (unsigned long long)lba
, (unsigned long long)range
);
1140 ret
= dev
->transport
->do_discard(dev
, lba
, range
);
1142 pr_debug("blkdev_issue_discard() failed for WRITE_SAME\n");
1150 transport_emulate_control_cdb(struct se_task
*task
)
1152 struct se_cmd
*cmd
= task
->task_se_cmd
;
1153 struct se_device
*dev
= cmd
->se_dev
;
1154 unsigned short service_action
;
1157 switch (cmd
->t_task_cdb
[0]) {
1159 ret
= target_emulate_inquiry(cmd
);
1162 ret
= target_emulate_readcapacity(cmd
);
1165 ret
= target_emulate_modesense(cmd
, 0);
1168 ret
= target_emulate_modesense(cmd
, 1);
1170 case SERVICE_ACTION_IN
:
1171 switch (cmd
->t_task_cdb
[1] & 0x1f) {
1172 case SAI_READ_CAPACITY_16
:
1173 ret
= target_emulate_readcapacity_16(cmd
);
1176 pr_err("Unsupported SA: 0x%02x\n",
1177 cmd
->t_task_cdb
[1] & 0x1f);
1178 return PYX_TRANSPORT_UNKNOWN_SAM_OPCODE
;
1182 ret
= target_emulate_request_sense(cmd
);
1185 if (!dev
->transport
->do_discard
) {
1186 pr_err("UNMAP emulation not supported for: %s\n",
1187 dev
->transport
->name
);
1188 return PYX_TRANSPORT_UNKNOWN_SAM_OPCODE
;
1190 ret
= target_emulate_unmap(task
);
1193 if (!dev
->transport
->do_discard
) {
1194 pr_err("WRITE_SAME emulation not supported"
1195 " for: %s\n", dev
->transport
->name
);
1196 return PYX_TRANSPORT_UNKNOWN_SAM_OPCODE
;
1198 ret
= target_emulate_write_same(task
,
1199 get_unaligned_be16(&cmd
->t_task_cdb
[7]));
1202 if (!dev
->transport
->do_discard
) {
1203 pr_err("WRITE_SAME_16 emulation not supported"
1204 " for: %s\n", dev
->transport
->name
);
1205 return PYX_TRANSPORT_UNKNOWN_SAM_OPCODE
;
1207 ret
= target_emulate_write_same(task
,
1208 get_unaligned_be32(&cmd
->t_task_cdb
[10]));
1210 case VARIABLE_LENGTH_CMD
:
1212 get_unaligned_be16(&cmd
->t_task_cdb
[8]);
1213 switch (service_action
) {
1215 if (!dev
->transport
->do_discard
) {
1216 pr_err("WRITE_SAME_32 SA emulation not"
1217 " supported for: %s\n",
1218 dev
->transport
->name
);
1219 return PYX_TRANSPORT_UNKNOWN_SAM_OPCODE
;
1221 ret
= target_emulate_write_same(task
,
1222 get_unaligned_be32(&cmd
->t_task_cdb
[28]));
1225 pr_err("Unsupported VARIABLE_LENGTH_CMD SA:"
1226 " 0x%02x\n", service_action
);
1230 case SYNCHRONIZE_CACHE
:
1231 case 0x91: /* SYNCHRONIZE_CACHE_16: */
1232 if (!dev
->transport
->do_sync_cache
) {
1233 pr_err("SYNCHRONIZE_CACHE emulation not supported"
1234 " for: %s\n", dev
->transport
->name
);
1235 return PYX_TRANSPORT_UNKNOWN_SAM_OPCODE
;
1237 dev
->transport
->do_sync_cache(task
);
1239 case ALLOW_MEDIUM_REMOVAL
:
1245 case TEST_UNIT_READY
:
1247 case WRITE_FILEMARKS
:
1250 pr_err("Unsupported SCSI Opcode: 0x%02x for %s\n",
1251 cmd
->t_task_cdb
[0], dev
->transport
->name
);
1252 return PYX_TRANSPORT_UNKNOWN_SAM_OPCODE
;
1258 * Handle the successful completion here unless a caller
1259 * has explictly requested an asychronous completion.
1261 if (!(cmd
->se_cmd_flags
& SCF_EMULATE_CDB_ASYNC
)) {
1262 task
->task_scsi_status
= GOOD
;
1263 transport_complete_task(task
, 1);
1266 return PYX_TRANSPORT_SENT_TO_TRANSPORT
;
1270 * Write a CDB into @cdb that is based on the one the intiator sent us,
1271 * but updated to only cover the sectors that the current task handles.
1273 void target_get_task_cdb(struct se_task
*task
, unsigned char *cdb
)
1275 struct se_cmd
*cmd
= task
->task_se_cmd
;
1276 unsigned int cdb_len
= scsi_command_size(cmd
->t_task_cdb
);
1278 memcpy(cdb
, cmd
->t_task_cdb
, cdb_len
);
1279 if (cmd
->se_cmd_flags
& SCF_SCSI_DATA_SG_IO_CDB
) {
1280 unsigned long long lba
= task
->task_lba
;
1281 u32 sectors
= task
->task_sectors
;
1285 /* 21-bit LBA and 8-bit sectors */
1286 cdb
[1] = (lba
>> 16) & 0x1f;
1287 cdb
[2] = (lba
>> 8) & 0xff;
1288 cdb
[3] = lba
& 0xff;
1289 cdb
[4] = sectors
& 0xff;
1292 /* 32-bit LBA and 16-bit sectors */
1293 put_unaligned_be32(lba
, &cdb
[2]);
1294 put_unaligned_be16(sectors
, &cdb
[7]);
1297 /* 32-bit LBA and 32-bit sectors */
1298 put_unaligned_be32(lba
, &cdb
[2]);
1299 put_unaligned_be32(sectors
, &cdb
[6]);
1302 /* 64-bit LBA and 32-bit sectors */
1303 put_unaligned_be64(lba
, &cdb
[2]);
1304 put_unaligned_be32(sectors
, &cdb
[10]);
1307 /* 64-bit LBA and 32-bit sectors, extended CDB */
1308 put_unaligned_be64(lba
, &cdb
[12]);
1309 put_unaligned_be32(sectors
, &cdb
[28]);
1316 EXPORT_SYMBOL(target_get_task_cdb
);