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_backend.h>
33 #include <target/target_core_fabric.h>
35 #include "target_core_internal.h"
36 #include "target_core_ua.h"
39 target_fill_alua_data(struct se_port
*port
, unsigned char *buf
)
41 struct t10_alua_tg_pt_gp
*tg_pt_gp
;
42 struct t10_alua_tg_pt_gp_member
*tg_pt_gp_mem
;
45 * Set SCCS for MAINTENANCE_IN + REPORT_TARGET_PORT_GROUPS.
50 * Set TPGS field for explict and/or implict ALUA access type
53 * See spc4r17 section 6.4.2 Table 135
57 tg_pt_gp_mem
= port
->sep_alua_tg_pt_gp_mem
;
61 spin_lock(&tg_pt_gp_mem
->tg_pt_gp_mem_lock
);
62 tg_pt_gp
= tg_pt_gp_mem
->tg_pt_gp
;
64 buf
[5] |= tg_pt_gp
->tg_pt_gp_alua_access_type
;
65 spin_unlock(&tg_pt_gp_mem
->tg_pt_gp_mem_lock
);
69 target_emulate_inquiry_std(struct se_cmd
*cmd
, char *buf
)
71 struct se_lun
*lun
= cmd
->se_lun
;
72 struct se_device
*dev
= cmd
->se_dev
;
74 /* Set RMB (removable media) for tape devices */
75 if (dev
->transport
->get_device_type(dev
) == TYPE_TAPE
)
78 buf
[2] = dev
->transport
->get_device_rev(dev
);
81 * NORMACA and HISUP = 0, RESPONSE DATA FORMAT = 2
84 * A RESPONSE DATA FORMAT field set to 2h indicates that the
85 * standard INQUIRY data is in the format defined in this
86 * standard. Response data format values less than 2h are
87 * obsolete. Response data format values greater than 2h are
93 * Enable SCCS and TPGS fields for Emulated ALUA
95 if (dev
->se_sub_dev
->t10_alua
.alua_type
== SPC3_ALUA_EMULATED
)
96 target_fill_alua_data(lun
->lun_sep
, buf
);
98 buf
[7] = 0x2; /* CmdQue=1 */
100 snprintf(&buf
[8], 8, "LIO-ORG");
101 snprintf(&buf
[16], 16, "%s", dev
->se_sub_dev
->t10_wwn
.model
);
102 snprintf(&buf
[32], 4, "%s", dev
->se_sub_dev
->t10_wwn
.revision
);
103 buf
[4] = 31; /* Set additional length to 31 */
108 /* unit serial number */
110 target_emulate_evpd_80(struct se_cmd
*cmd
, unsigned char *buf
)
112 struct se_device
*dev
= cmd
->se_dev
;
115 if (dev
->se_sub_dev
->su_dev_flags
&
116 SDF_EMULATED_VPD_UNIT_SERIAL
) {
119 unit_serial_len
= strlen(dev
->se_sub_dev
->t10_wwn
.unit_serial
);
120 unit_serial_len
++; /* For NULL Terminator */
122 len
+= sprintf(&buf
[4], "%s",
123 dev
->se_sub_dev
->t10_wwn
.unit_serial
);
124 len
++; /* Extra Byte for NULL Terminator */
131 target_parse_naa_6h_vendor_specific(struct se_device
*dev
, unsigned char *buf
)
133 unsigned char *p
= &dev
->se_sub_dev
->t10_wwn
.unit_serial
[0];
138 * Generate up to 36 bits of VENDOR SPECIFIC IDENTIFIER starting on
139 * byte 3 bit 3-0 for NAA IEEE Registered Extended DESIGNATOR field
140 * format, followed by 64 bits of VENDOR SPECIFIC IDENTIFIER EXTENSION
141 * to complete the payload. These are based from VPD=0x80 PRODUCT SERIAL
142 * NUMBER set via vpd_unit_serial in target_core_configfs.c to ensure
143 * per device uniqeness.
145 for (cnt
= 0; *p
&& cnt
< 13; p
++) {
146 int val
= hex_to_bin(*p
);
162 * Device identification VPD, for a complete list of
163 * DESIGNATOR TYPEs see spc4r17 Table 459.
166 target_emulate_evpd_83(struct se_cmd
*cmd
, unsigned char *buf
)
168 struct se_device
*dev
= cmd
->se_dev
;
169 struct se_lun
*lun
= cmd
->se_lun
;
170 struct se_port
*port
= NULL
;
171 struct se_portal_group
*tpg
= NULL
;
172 struct t10_alua_lu_gp_member
*lu_gp_mem
;
173 struct t10_alua_tg_pt_gp
*tg_pt_gp
;
174 struct t10_alua_tg_pt_gp_member
*tg_pt_gp_mem
;
175 unsigned char *prod
= &dev
->se_sub_dev
->t10_wwn
.model
[0];
177 u32 unit_serial_len
, off
= 0;
183 * NAA IEEE Registered Extended Assigned designator format, see
184 * spc4r17 section 7.7.3.6.5
186 * We depend upon a target_core_mod/ConfigFS provided
187 * /sys/kernel/config/target/core/$HBA/$DEV/wwn/vpd_unit_serial
188 * value in order to return the NAA id.
190 if (!(dev
->se_sub_dev
->su_dev_flags
& SDF_EMULATED_VPD_UNIT_SERIAL
))
191 goto check_t10_vend_desc
;
193 /* CODE SET == Binary */
196 /* Set ASSOCIATION == addressed logical unit: 0)b */
199 /* Identifier/Designator type == NAA identifier */
203 /* Identifier/Designator length */
207 * Start NAA IEEE Registered Extended Identifier/Designator
209 buf
[off
++] = (0x6 << 4);
212 * Use OpenFabrics IEEE Company ID: 00 14 05
216 buf
[off
] = (0x5 << 4);
219 * Return ConfigFS Unit Serial Number information for
220 * VENDOR_SPECIFIC_IDENTIFIER and
221 * VENDOR_SPECIFIC_IDENTIFIER_EXTENTION
223 target_parse_naa_6h_vendor_specific(dev
, &buf
[off
]);
230 * T10 Vendor Identifier Page, see spc4r17 section 7.7.3.4
232 id_len
= 8; /* For Vendor field */
233 prod_len
= 4; /* For VPD Header */
234 prod_len
+= 8; /* For Vendor field */
235 prod_len
+= strlen(prod
);
236 prod_len
++; /* For : */
238 if (dev
->se_sub_dev
->su_dev_flags
&
239 SDF_EMULATED_VPD_UNIT_SERIAL
) {
241 strlen(&dev
->se_sub_dev
->t10_wwn
.unit_serial
[0]);
242 unit_serial_len
++; /* For NULL Terminator */
244 id_len
+= sprintf(&buf
[off
+12], "%s:%s", prod
,
245 &dev
->se_sub_dev
->t10_wwn
.unit_serial
[0]);
247 buf
[off
] = 0x2; /* ASCII */
248 buf
[off
+1] = 0x1; /* T10 Vendor ID */
250 memcpy(&buf
[off
+4], "LIO-ORG", 8);
251 /* Extra Byte for NULL Terminator */
253 /* Identifier Length */
255 /* Header size for Designation descriptor */
259 * struct se_port is only set for INQUIRY VPD=1 through $FABRIC_MOD
263 struct t10_alua_lu_gp
*lu_gp
;
264 u32 padding
, scsi_name_len
;
271 * Relative target port identifer, see spc4r17
274 * Get the PROTOCOL IDENTIFIER as defined by spc4r17
275 * section 7.5.1 Table 362
278 (tpg
->se_tpg_tfo
->get_fabric_proto_ident(tpg
) << 4);
279 buf
[off
++] |= 0x1; /* CODE SET == Binary */
280 buf
[off
] = 0x80; /* Set PIV=1 */
281 /* Set ASSOCIATION == target port: 01b */
283 /* DESIGNATOR TYPE == Relative target port identifer */
285 off
++; /* Skip over Reserved */
286 buf
[off
++] = 4; /* DESIGNATOR LENGTH */
287 /* Skip over Obsolete field in RTPI payload
290 buf
[off
++] = ((port
->sep_rtpi
>> 8) & 0xff);
291 buf
[off
++] = (port
->sep_rtpi
& 0xff);
292 len
+= 8; /* Header size + Designation descriptor */
294 * Target port group identifier, see spc4r17
297 * Get the PROTOCOL IDENTIFIER as defined by spc4r17
298 * section 7.5.1 Table 362
300 if (dev
->se_sub_dev
->t10_alua
.alua_type
!=
302 goto check_scsi_name
;
304 tg_pt_gp_mem
= port
->sep_alua_tg_pt_gp_mem
;
308 spin_lock(&tg_pt_gp_mem
->tg_pt_gp_mem_lock
);
309 tg_pt_gp
= tg_pt_gp_mem
->tg_pt_gp
;
311 spin_unlock(&tg_pt_gp_mem
->tg_pt_gp_mem_lock
);
314 tg_pt_gp_id
= tg_pt_gp
->tg_pt_gp_id
;
315 spin_unlock(&tg_pt_gp_mem
->tg_pt_gp_mem_lock
);
318 (tpg
->se_tpg_tfo
->get_fabric_proto_ident(tpg
) << 4);
319 buf
[off
++] |= 0x1; /* CODE SET == Binary */
320 buf
[off
] = 0x80; /* Set PIV=1 */
321 /* Set ASSOCIATION == target port: 01b */
323 /* DESIGNATOR TYPE == Target port group identifier */
325 off
++; /* Skip over Reserved */
326 buf
[off
++] = 4; /* DESIGNATOR LENGTH */
327 off
+= 2; /* Skip over Reserved Field */
328 buf
[off
++] = ((tg_pt_gp_id
>> 8) & 0xff);
329 buf
[off
++] = (tg_pt_gp_id
& 0xff);
330 len
+= 8; /* Header size + Designation descriptor */
332 * Logical Unit Group identifier, see spc4r17
336 lu_gp_mem
= dev
->dev_alua_lu_gp_mem
;
338 goto check_scsi_name
;
340 spin_lock(&lu_gp_mem
->lu_gp_mem_lock
);
341 lu_gp
= lu_gp_mem
->lu_gp
;
343 spin_unlock(&lu_gp_mem
->lu_gp_mem_lock
);
344 goto check_scsi_name
;
346 lu_gp_id
= lu_gp
->lu_gp_id
;
347 spin_unlock(&lu_gp_mem
->lu_gp_mem_lock
);
349 buf
[off
++] |= 0x1; /* CODE SET == Binary */
350 /* DESIGNATOR TYPE == Logical Unit Group identifier */
352 off
++; /* Skip over Reserved */
353 buf
[off
++] = 4; /* DESIGNATOR LENGTH */
354 off
+= 2; /* Skip over Reserved Field */
355 buf
[off
++] = ((lu_gp_id
>> 8) & 0xff);
356 buf
[off
++] = (lu_gp_id
& 0xff);
357 len
+= 8; /* Header size + Designation descriptor */
359 * SCSI name string designator, see spc4r17
362 * Get the PROTOCOL IDENTIFIER as defined by spc4r17
363 * section 7.5.1 Table 362
366 scsi_name_len
= strlen(tpg
->se_tpg_tfo
->tpg_get_wwn(tpg
));
367 /* UTF-8 ",t,0x<16-bit TPGT>" + NULL Terminator */
369 /* Check for 4-byte padding */
370 padding
= ((-scsi_name_len
) & 3);
372 scsi_name_len
+= padding
;
373 /* Header size + Designation descriptor */
377 (tpg
->se_tpg_tfo
->get_fabric_proto_ident(tpg
) << 4);
378 buf
[off
++] |= 0x3; /* CODE SET == UTF-8 */
379 buf
[off
] = 0x80; /* Set PIV=1 */
380 /* Set ASSOCIATION == target port: 01b */
382 /* DESIGNATOR TYPE == SCSI name string */
384 off
+= 2; /* Skip over Reserved and length */
386 * SCSI name string identifer containing, $FABRIC_MOD
387 * dependent information. For LIO-Target and iSCSI
388 * Target Port, this means "<iSCSI name>,t,0x<TPGT> in
391 tpgt
= tpg
->se_tpg_tfo
->tpg_get_tag(tpg
);
392 scsi_name_len
= sprintf(&buf
[off
], "%s,t,0x%04x",
393 tpg
->se_tpg_tfo
->tpg_get_wwn(tpg
), tpgt
);
394 scsi_name_len
+= 1 /* Include NULL terminator */;
396 * The null-terminated, null-padded (see 4.4.2) SCSI
397 * NAME STRING field contains a UTF-8 format string.
398 * The number of bytes in the SCSI NAME STRING field
399 * (i.e., the value in the DESIGNATOR LENGTH field)
400 * shall be no larger than 256 and shall be a multiple
404 scsi_name_len
+= padding
;
406 buf
[off
-1] = scsi_name_len
;
407 off
+= scsi_name_len
;
408 /* Header size + Designation descriptor */
409 len
+= (scsi_name_len
+ 4);
411 buf
[2] = ((len
>> 8) & 0xff);
412 buf
[3] = (len
& 0xff); /* Page Length for VPD 0x83 */
416 /* Extended INQUIRY Data VPD Page */
418 target_emulate_evpd_86(struct se_cmd
*cmd
, unsigned char *buf
)
421 /* Set HEADSUP, ORDSUP, SIMPSUP */
424 /* If WriteCache emulation is enabled, set V_SUP */
425 if (cmd
->se_dev
->se_sub_dev
->se_dev_attrib
.emulate_write_cache
> 0)
430 /* Block Limits VPD page */
432 target_emulate_evpd_b0(struct se_cmd
*cmd
, unsigned char *buf
)
434 struct se_device
*dev
= cmd
->se_dev
;
438 * Following sbc3r22 section 6.5.3 Block Limits VPD page, when
439 * emulate_tpu=1 or emulate_tpws=1 we will be expect a
440 * different page length for Thin Provisioning.
442 if (dev
->se_sub_dev
->se_dev_attrib
.emulate_tpu
|| dev
->se_sub_dev
->se_dev_attrib
.emulate_tpws
)
445 buf
[0] = dev
->transport
->get_device_type(dev
);
446 buf
[3] = have_tp
? 0x3c : 0x10;
452 * Set OPTIMAL TRANSFER LENGTH GRANULARITY
454 put_unaligned_be16(1, &buf
[6]);
457 * Set MAXIMUM TRANSFER LENGTH
459 put_unaligned_be32(dev
->se_sub_dev
->se_dev_attrib
.fabric_max_sectors
, &buf
[8]);
462 * Set OPTIMAL TRANSFER LENGTH
464 put_unaligned_be32(dev
->se_sub_dev
->se_dev_attrib
.optimal_sectors
, &buf
[12]);
467 * Exit now if we don't support TP.
473 * Set MAXIMUM UNMAP LBA COUNT
475 put_unaligned_be32(dev
->se_sub_dev
->se_dev_attrib
.max_unmap_lba_count
, &buf
[20]);
478 * Set MAXIMUM UNMAP BLOCK DESCRIPTOR COUNT
480 put_unaligned_be32(dev
->se_sub_dev
->se_dev_attrib
.max_unmap_block_desc_count
,
484 * Set OPTIMAL UNMAP GRANULARITY
486 put_unaligned_be32(dev
->se_sub_dev
->se_dev_attrib
.unmap_granularity
, &buf
[28]);
489 * UNMAP GRANULARITY ALIGNMENT
491 put_unaligned_be32(dev
->se_sub_dev
->se_dev_attrib
.unmap_granularity_alignment
,
493 if (dev
->se_sub_dev
->se_dev_attrib
.unmap_granularity_alignment
!= 0)
494 buf
[32] |= 0x80; /* Set the UGAVALID bit */
499 /* Block Device Characteristics VPD page */
501 target_emulate_evpd_b1(struct se_cmd
*cmd
, unsigned char *buf
)
503 struct se_device
*dev
= cmd
->se_dev
;
505 buf
[0] = dev
->transport
->get_device_type(dev
);
507 buf
[5] = dev
->se_sub_dev
->se_dev_attrib
.is_nonrot
? 1 : 0;
512 /* Thin Provisioning VPD */
514 target_emulate_evpd_b2(struct se_cmd
*cmd
, unsigned char *buf
)
516 struct se_device
*dev
= cmd
->se_dev
;
519 * From sbc3r22 section 6.5.4 Thin Provisioning VPD page:
521 * The PAGE LENGTH field is defined in SPC-4. If the DP bit is set to
522 * zero, then the page length shall be set to 0004h. If the DP bit
523 * is set to one, then the page length shall be set to the value
524 * defined in table 162.
526 buf
[0] = dev
->transport
->get_device_type(dev
);
529 * Set Hardcoded length mentioned above for DP=0
531 put_unaligned_be16(0x0004, &buf
[2]);
534 * The THRESHOLD EXPONENT field indicates the threshold set size in
535 * LBAs as a power of 2 (i.e., the threshold set size is equal to
536 * 2(threshold exponent)).
538 * Note that this is currently set to 0x00 as mkp says it will be
539 * changing again. We can enable this once it has settled in T10
540 * and is actually used by Linux/SCSI ML code.
545 * A TPU bit set to one indicates that the device server supports
546 * the UNMAP command (see 5.25). A TPU bit set to zero indicates
547 * that the device server does not support the UNMAP command.
549 if (dev
->se_sub_dev
->se_dev_attrib
.emulate_tpu
!= 0)
553 * A TPWS bit set to one indicates that the device server supports
554 * the use of the WRITE SAME (16) command (see 5.42) to unmap LBAs.
555 * A TPWS bit set to zero indicates that the device server does not
556 * support the use of the WRITE SAME (16) command to unmap LBAs.
558 if (dev
->se_sub_dev
->se_dev_attrib
.emulate_tpws
!= 0)
565 target_emulate_evpd_00(struct se_cmd
*cmd
, unsigned char *buf
);
569 int (*emulate
)(struct se_cmd
*, unsigned char *);
570 } evpd_handlers
[] = {
571 { .page
= 0x00, .emulate
= target_emulate_evpd_00
},
572 { .page
= 0x80, .emulate
= target_emulate_evpd_80
},
573 { .page
= 0x83, .emulate
= target_emulate_evpd_83
},
574 { .page
= 0x86, .emulate
= target_emulate_evpd_86
},
575 { .page
= 0xb0, .emulate
= target_emulate_evpd_b0
},
576 { .page
= 0xb1, .emulate
= target_emulate_evpd_b1
},
577 { .page
= 0xb2, .emulate
= target_emulate_evpd_b2
},
580 /* supported vital product data pages */
582 target_emulate_evpd_00(struct se_cmd
*cmd
, unsigned char *buf
)
587 * Only report the INQUIRY EVPD=1 pages after a valid NAA
588 * Registered Extended LUN WWN has been set via ConfigFS
589 * during device creation/restart.
591 if (cmd
->se_dev
->se_sub_dev
->su_dev_flags
&
592 SDF_EMULATED_VPD_UNIT_SERIAL
) {
593 buf
[3] = ARRAY_SIZE(evpd_handlers
);
594 for (p
= 0; p
< ARRAY_SIZE(evpd_handlers
); ++p
)
595 buf
[p
+ 4] = evpd_handlers
[p
].page
;
601 int target_emulate_inquiry(struct se_task
*task
)
603 struct se_cmd
*cmd
= task
->task_se_cmd
;
604 struct se_device
*dev
= cmd
->se_dev
;
605 struct se_portal_group
*tpg
= cmd
->se_lun
->lun_sep
->sep_tpg
;
606 unsigned char *buf
, *map_buf
;
607 unsigned char *cdb
= cmd
->t_task_cdb
;
610 map_buf
= transport_kmap_data_sg(cmd
);
612 * If SCF_PASSTHROUGH_SG_TO_MEM_NOALLOC is not set, then we
613 * know we actually allocated a full page. Otherwise, if the
614 * data buffer is too small, allocate a temporary buffer so we
615 * don't have to worry about overruns in all our INQUIRY
616 * emulation handling.
618 if (cmd
->data_length
< SE_INQUIRY_BUF
&&
619 (cmd
->se_cmd_flags
& SCF_PASSTHROUGH_SG_TO_MEM_NOALLOC
)) {
620 buf
= kzalloc(SE_INQUIRY_BUF
, GFP_KERNEL
);
622 transport_kunmap_data_sg(cmd
);
623 cmd
->scsi_sense_reason
= TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE
;
630 if (dev
== tpg
->tpg_virt_lun0
.lun_se_dev
)
631 buf
[0] = 0x3f; /* Not connected */
633 buf
[0] = dev
->transport
->get_device_type(dev
);
635 if (!(cdb
[1] & 0x1)) {
637 pr_err("INQUIRY with EVPD==0 but PAGE CODE=%02x\n",
639 cmd
->scsi_sense_reason
= TCM_INVALID_CDB_FIELD
;
644 ret
= target_emulate_inquiry_std(cmd
, buf
);
648 for (p
= 0; p
< ARRAY_SIZE(evpd_handlers
); ++p
) {
649 if (cdb
[2] == evpd_handlers
[p
].page
) {
651 ret
= evpd_handlers
[p
].emulate(cmd
, buf
);
656 pr_err("Unknown VPD Code: 0x%02x\n", cdb
[2]);
657 cmd
->scsi_sense_reason
= TCM_INVALID_CDB_FIELD
;
661 if (buf
!= map_buf
) {
662 memcpy(map_buf
, buf
, cmd
->data_length
);
665 transport_kunmap_data_sg(cmd
);
668 task
->task_scsi_status
= GOOD
;
669 transport_complete_task(task
, 1);
674 int target_emulate_readcapacity(struct se_task
*task
)
676 struct se_cmd
*cmd
= task
->task_se_cmd
;
677 struct se_device
*dev
= cmd
->se_dev
;
679 unsigned long long blocks_long
= dev
->transport
->get_blocks(dev
);
682 if (blocks_long
>= 0x00000000ffffffff)
685 blocks
= (u32
)blocks_long
;
687 buf
= transport_kmap_data_sg(cmd
);
689 buf
[0] = (blocks
>> 24) & 0xff;
690 buf
[1] = (blocks
>> 16) & 0xff;
691 buf
[2] = (blocks
>> 8) & 0xff;
692 buf
[3] = blocks
& 0xff;
693 buf
[4] = (dev
->se_sub_dev
->se_dev_attrib
.block_size
>> 24) & 0xff;
694 buf
[5] = (dev
->se_sub_dev
->se_dev_attrib
.block_size
>> 16) & 0xff;
695 buf
[6] = (dev
->se_sub_dev
->se_dev_attrib
.block_size
>> 8) & 0xff;
696 buf
[7] = dev
->se_sub_dev
->se_dev_attrib
.block_size
& 0xff;
698 transport_kunmap_data_sg(cmd
);
700 task
->task_scsi_status
= GOOD
;
701 transport_complete_task(task
, 1);
705 int target_emulate_readcapacity_16(struct se_task
*task
)
707 struct se_cmd
*cmd
= task
->task_se_cmd
;
708 struct se_device
*dev
= cmd
->se_dev
;
710 unsigned long long blocks
= dev
->transport
->get_blocks(dev
);
712 buf
= transport_kmap_data_sg(cmd
);
714 buf
[0] = (blocks
>> 56) & 0xff;
715 buf
[1] = (blocks
>> 48) & 0xff;
716 buf
[2] = (blocks
>> 40) & 0xff;
717 buf
[3] = (blocks
>> 32) & 0xff;
718 buf
[4] = (blocks
>> 24) & 0xff;
719 buf
[5] = (blocks
>> 16) & 0xff;
720 buf
[6] = (blocks
>> 8) & 0xff;
721 buf
[7] = blocks
& 0xff;
722 buf
[8] = (dev
->se_sub_dev
->se_dev_attrib
.block_size
>> 24) & 0xff;
723 buf
[9] = (dev
->se_sub_dev
->se_dev_attrib
.block_size
>> 16) & 0xff;
724 buf
[10] = (dev
->se_sub_dev
->se_dev_attrib
.block_size
>> 8) & 0xff;
725 buf
[11] = dev
->se_sub_dev
->se_dev_attrib
.block_size
& 0xff;
727 * Set Thin Provisioning Enable bit following sbc3r22 in section
728 * READ CAPACITY (16) byte 14 if emulate_tpu or emulate_tpws is enabled.
730 if (dev
->se_sub_dev
->se_dev_attrib
.emulate_tpu
|| dev
->se_sub_dev
->se_dev_attrib
.emulate_tpws
)
733 transport_kunmap_data_sg(cmd
);
735 task
->task_scsi_status
= GOOD
;
736 transport_complete_task(task
, 1);
741 target_modesense_rwrecovery(unsigned char *p
)
750 target_modesense_control(struct se_device
*dev
, unsigned char *p
)
756 * From spc4r23, 7.4.7 Control mode page
758 * The QUEUE ALGORITHM MODIFIER field (see table 368) specifies
759 * restrictions on the algorithm used for reordering commands
760 * having the SIMPLE task attribute (see SAM-4).
762 * Table 368 -- QUEUE ALGORITHM MODIFIER field
764 * 0h Restricted reordering
765 * 1h Unrestricted reordering allowed
767 * 8h to Fh Vendor specific
769 * A value of zero in the QUEUE ALGORITHM MODIFIER field specifies that
770 * the device server shall order the processing sequence of commands
771 * having the SIMPLE task attribute such that data integrity is maintained
772 * for that I_T nexus (i.e., if the transmission of new SCSI transport protocol
773 * requests is halted at any time, the final value of all data observable
774 * on the medium shall be the same as if all the commands had been processed
775 * with the ORDERED task attribute).
777 * A value of one in the QUEUE ALGORITHM MODIFIER field specifies that the
778 * device server may reorder the processing sequence of commands having the
779 * SIMPLE task attribute in any manner. Any data integrity exposures related to
780 * command sequence order shall be explicitly handled by the application client
781 * through the selection of appropriate ommands and task attributes.
783 p
[3] = (dev
->se_sub_dev
->se_dev_attrib
.emulate_rest_reord
== 1) ? 0x00 : 0x10;
785 * From spc4r17, section 7.4.6 Control mode Page
787 * Unit Attention interlocks control (UN_INTLCK_CTRL) to code 00b
789 * 00b: The logical unit shall clear any unit attention condition
790 * reported in the same I_T_L_Q nexus transaction as a CHECK CONDITION
791 * status and shall not establish a unit attention condition when a com-
792 * mand is completed with BUSY, TASK SET FULL, or RESERVATION CONFLICT
795 * 10b: The logical unit shall not clear any unit attention condition
796 * reported in the same I_T_L_Q nexus transaction as a CHECK CONDITION
797 * status and shall not establish a unit attention condition when
798 * a command is completed with BUSY, TASK SET FULL, or RESERVATION
801 * 11b a The logical unit shall not clear any unit attention condition
802 * reported in the same I_T_L_Q nexus transaction as a CHECK CONDITION
803 * status and shall establish a unit attention condition for the
804 * initiator port associated with the I_T nexus on which the BUSY,
805 * TASK SET FULL, or RESERVATION CONFLICT status is being returned.
806 * Depending on the status, the additional sense code shall be set to
807 * PREVIOUS BUSY STATUS, PREVIOUS TASK SET FULL STATUS, or PREVIOUS
808 * RESERVATION CONFLICT STATUS. Until it is cleared by a REQUEST SENSE
809 * command, a unit attention condition shall be established only once
810 * for a BUSY, TASK SET FULL, or RESERVATION CONFLICT status regardless
811 * to the number of commands completed with one of those status codes.
813 p
[4] = (dev
->se_sub_dev
->se_dev_attrib
.emulate_ua_intlck_ctrl
== 2) ? 0x30 :
814 (dev
->se_sub_dev
->se_dev_attrib
.emulate_ua_intlck_ctrl
== 1) ? 0x20 : 0x00;
816 * From spc4r17, section 7.4.6 Control mode Page
818 * Task Aborted Status (TAS) bit set to zero.
820 * A task aborted status (TAS) bit set to zero specifies that aborted
821 * tasks shall be terminated by the device server without any response
822 * to the application client. A TAS bit set to one specifies that tasks
823 * aborted by the actions of an I_T nexus other than the I_T nexus on
824 * which the command was received shall be completed with TASK ABORTED
825 * status (see SAM-4).
827 p
[5] = (dev
->se_sub_dev
->se_dev_attrib
.emulate_tas
) ? 0x40 : 0x00;
836 target_modesense_caching(struct se_device
*dev
, unsigned char *p
)
840 if (dev
->se_sub_dev
->se_dev_attrib
.emulate_write_cache
> 0)
841 p
[2] = 0x04; /* Write Cache Enable */
842 p
[12] = 0x20; /* Disabled Read Ahead */
848 target_modesense_write_protect(unsigned char *buf
, int type
)
851 * I believe that the WP bit (bit 7) in the mode header is the same for
858 buf
[0] |= 0x80; /* WP bit */
864 target_modesense_dpofua(unsigned char *buf
, int type
)
868 buf
[0] |= 0x10; /* DPOFUA bit */
875 int target_emulate_modesense(struct se_task
*task
)
877 struct se_cmd
*cmd
= task
->task_se_cmd
;
878 struct se_device
*dev
= cmd
->se_dev
;
879 char *cdb
= cmd
->t_task_cdb
;
881 int type
= dev
->transport
->get_device_type(dev
);
882 int ten
= (cmd
->t_task_cdb
[0] == MODE_SENSE_10
);
883 int offset
= ten
? 8 : 4;
885 unsigned char buf
[SE_MODE_PAGE_BUF
];
887 memset(buf
, 0, SE_MODE_PAGE_BUF
);
889 switch (cdb
[2] & 0x3f) {
891 length
= target_modesense_rwrecovery(&buf
[offset
]);
894 length
= target_modesense_caching(dev
, &buf
[offset
]);
897 length
= target_modesense_control(dev
, &buf
[offset
]);
900 length
= target_modesense_rwrecovery(&buf
[offset
]);
901 length
+= target_modesense_caching(dev
, &buf
[offset
+length
]);
902 length
+= target_modesense_control(dev
, &buf
[offset
+length
]);
905 pr_err("MODE SENSE: unimplemented page/subpage: 0x%02x/0x%02x\n",
906 cdb
[2] & 0x3f, cdb
[3]);
907 cmd
->scsi_sense_reason
= TCM_UNKNOWN_MODE_PAGE
;
914 buf
[0] = (offset
>> 8) & 0xff;
915 buf
[1] = offset
& 0xff;
917 if ((cmd
->se_lun
->lun_access
& TRANSPORT_LUNFLAGS_READ_ONLY
) ||
919 (cmd
->se_deve
->lun_flags
& TRANSPORT_LUNFLAGS_READ_ONLY
)))
920 target_modesense_write_protect(&buf
[3], type
);
922 if ((dev
->se_sub_dev
->se_dev_attrib
.emulate_write_cache
> 0) &&
923 (dev
->se_sub_dev
->se_dev_attrib
.emulate_fua_write
> 0))
924 target_modesense_dpofua(&buf
[3], type
);
926 if ((offset
+ 2) > cmd
->data_length
)
927 offset
= cmd
->data_length
;
931 buf
[0] = offset
& 0xff;
933 if ((cmd
->se_lun
->lun_access
& TRANSPORT_LUNFLAGS_READ_ONLY
) ||
935 (cmd
->se_deve
->lun_flags
& TRANSPORT_LUNFLAGS_READ_ONLY
)))
936 target_modesense_write_protect(&buf
[2], type
);
938 if ((dev
->se_sub_dev
->se_dev_attrib
.emulate_write_cache
> 0) &&
939 (dev
->se_sub_dev
->se_dev_attrib
.emulate_fua_write
> 0))
940 target_modesense_dpofua(&buf
[2], type
);
942 if ((offset
+ 1) > cmd
->data_length
)
943 offset
= cmd
->data_length
;
946 rbuf
= transport_kmap_data_sg(cmd
);
947 memcpy(rbuf
, buf
, offset
);
948 transport_kunmap_data_sg(cmd
);
950 task
->task_scsi_status
= GOOD
;
951 transport_complete_task(task
, 1);
955 int target_emulate_request_sense(struct se_task
*task
)
957 struct se_cmd
*cmd
= task
->task_se_cmd
;
958 unsigned char *cdb
= cmd
->t_task_cdb
;
960 u8 ua_asc
= 0, ua_ascq
= 0;
964 pr_err("REQUEST_SENSE description emulation not"
966 cmd
->scsi_sense_reason
= TCM_INVALID_CDB_FIELD
;
970 buf
= transport_kmap_data_sg(cmd
);
972 if (!core_scsi3_ua_clear_for_request_sense(cmd
, &ua_asc
, &ua_ascq
)) {
974 * CURRENT ERROR, UNIT ATTENTION
977 buf
[SPC_SENSE_KEY_OFFSET
] = UNIT_ATTENTION
;
979 if (cmd
->data_length
< 18) {
985 * The Additional Sense Code (ASC) from the UNIT ATTENTION
987 buf
[SPC_ASC_KEY_OFFSET
] = ua_asc
;
988 buf
[SPC_ASCQ_KEY_OFFSET
] = ua_ascq
;
992 * CURRENT ERROR, NO SENSE
995 buf
[SPC_SENSE_KEY_OFFSET
] = NO_SENSE
;
997 if (cmd
->data_length
< 18) {
1003 * NO ADDITIONAL SENSE INFORMATION
1005 buf
[SPC_ASC_KEY_OFFSET
] = 0x00;
1010 transport_kunmap_data_sg(cmd
);
1011 task
->task_scsi_status
= GOOD
;
1012 transport_complete_task(task
, 1);
1017 * Used for TCM/IBLOCK and TCM/FILEIO for block/blk-lib.c level discard support.
1018 * Note this is not used for TCM/pSCSI passthrough
1020 int target_emulate_unmap(struct se_task
*task
)
1022 struct se_cmd
*cmd
= task
->task_se_cmd
;
1023 struct se_device
*dev
= cmd
->se_dev
;
1024 unsigned char *buf
, *ptr
= NULL
;
1025 unsigned char *cdb
= &cmd
->t_task_cdb
[0];
1027 unsigned int size
= cmd
->data_length
, range
;
1028 int ret
= 0, offset
;
1029 unsigned short dl
, bd_dl
;
1031 if (!dev
->transport
->do_discard
) {
1032 pr_err("UNMAP emulation not supported for: %s\n",
1033 dev
->transport
->name
);
1034 cmd
->scsi_sense_reason
= TCM_UNSUPPORTED_SCSI_OPCODE
;
1038 /* First UNMAP block descriptor starts at 8 byte offset */
1041 dl
= get_unaligned_be16(&cdb
[0]);
1042 bd_dl
= get_unaligned_be16(&cdb
[2]);
1044 buf
= transport_kmap_data_sg(cmd
);
1047 pr_debug("UNMAP: Sub: %s Using dl: %hu bd_dl: %hu size: %hu"
1048 " ptr: %p\n", dev
->transport
->name
, dl
, bd_dl
, size
, ptr
);
1051 lba
= get_unaligned_be64(&ptr
[0]);
1052 range
= get_unaligned_be32(&ptr
[8]);
1053 pr_debug("UNMAP: Using lba: %llu and range: %u\n",
1054 (unsigned long long)lba
, range
);
1056 ret
= dev
->transport
->do_discard(dev
, lba
, range
);
1058 pr_err("blkdev_issue_discard() failed: %d\n",
1068 transport_kunmap_data_sg(cmd
);
1070 task
->task_scsi_status
= GOOD
;
1071 transport_complete_task(task
, 1);
1077 * Used for TCM/IBLOCK and TCM/FILEIO for block/blk-lib.c level discard support.
1078 * Note this is not used for TCM/pSCSI passthrough
1080 int target_emulate_write_same(struct se_task
*task
)
1082 struct se_cmd
*cmd
= task
->task_se_cmd
;
1083 struct se_device
*dev
= cmd
->se_dev
;
1085 sector_t lba
= cmd
->t_task_lba
;
1089 if (!dev
->transport
->do_discard
) {
1090 pr_err("WRITE_SAME emulation not supported"
1091 " for: %s\n", dev
->transport
->name
);
1092 cmd
->scsi_sense_reason
= TCM_UNSUPPORTED_SCSI_OPCODE
;
1096 if (cmd
->t_task_cdb
[0] == WRITE_SAME
)
1097 num_blocks
= get_unaligned_be16(&cmd
->t_task_cdb
[7]);
1098 else if (cmd
->t_task_cdb
[0] == WRITE_SAME_16
)
1099 num_blocks
= get_unaligned_be32(&cmd
->t_task_cdb
[10]);
1100 else /* WRITE_SAME_32 via VARIABLE_LENGTH_CMD */
1101 num_blocks
= get_unaligned_be32(&cmd
->t_task_cdb
[28]);
1104 * Use the explicit range when non zero is supplied, otherwise calculate
1105 * the remaining range based on ->get_blocks() - starting LBA.
1107 if (num_blocks
!= 0)
1110 range
= (dev
->transport
->get_blocks(dev
) - lba
);
1112 pr_debug("WRITE_SAME UNMAP: LBA: %llu Range: %llu\n",
1113 (unsigned long long)lba
, (unsigned long long)range
);
1115 ret
= dev
->transport
->do_discard(dev
, lba
, range
);
1117 pr_debug("blkdev_issue_discard() failed for WRITE_SAME\n");
1121 task
->task_scsi_status
= GOOD
;
1122 transport_complete_task(task
, 1);
1126 int target_emulate_synchronize_cache(struct se_task
*task
)
1128 struct se_device
*dev
= task
->task_se_cmd
->se_dev
;
1129 struct se_cmd
*cmd
= task
->task_se_cmd
;
1131 if (!dev
->transport
->do_sync_cache
) {
1132 pr_err("SYNCHRONIZE_CACHE emulation not supported"
1133 " for: %s\n", dev
->transport
->name
);
1134 cmd
->scsi_sense_reason
= TCM_UNSUPPORTED_SCSI_OPCODE
;
1138 dev
->transport
->do_sync_cache(task
);
1142 int target_emulate_noop(struct se_task
*task
)
1144 task
->task_scsi_status
= GOOD
;
1145 transport_complete_task(task
, 1);
1150 * Write a CDB into @cdb that is based on the one the intiator sent us,
1151 * but updated to only cover the sectors that the current task handles.
1153 void target_get_task_cdb(struct se_task
*task
, unsigned char *cdb
)
1155 struct se_cmd
*cmd
= task
->task_se_cmd
;
1156 unsigned int cdb_len
= scsi_command_size(cmd
->t_task_cdb
);
1158 memcpy(cdb
, cmd
->t_task_cdb
, cdb_len
);
1159 if (cmd
->se_cmd_flags
& SCF_SCSI_DATA_SG_IO_CDB
) {
1160 unsigned long long lba
= task
->task_lba
;
1161 u32 sectors
= task
->task_sectors
;
1165 /* 21-bit LBA and 8-bit sectors */
1166 cdb
[1] = (lba
>> 16) & 0x1f;
1167 cdb
[2] = (lba
>> 8) & 0xff;
1168 cdb
[3] = lba
& 0xff;
1169 cdb
[4] = sectors
& 0xff;
1172 /* 32-bit LBA and 16-bit sectors */
1173 put_unaligned_be32(lba
, &cdb
[2]);
1174 put_unaligned_be16(sectors
, &cdb
[7]);
1177 /* 32-bit LBA and 32-bit sectors */
1178 put_unaligned_be32(lba
, &cdb
[2]);
1179 put_unaligned_be32(sectors
, &cdb
[6]);
1182 /* 64-bit LBA and 32-bit sectors */
1183 put_unaligned_be64(lba
, &cdb
[2]);
1184 put_unaligned_be32(sectors
, &cdb
[10]);
1187 /* 64-bit LBA and 32-bit sectors, extended CDB */
1188 put_unaligned_be64(lba
, &cdb
[12]);
1189 put_unaligned_be32(sectors
, &cdb
[28]);
1196 EXPORT_SYMBOL(target_get_task_cdb
);