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authorChristoph Hellwig <hch@infradead.org>2012-05-20 11:59:15 -0400
committerNicholas Bellinger <nab@linux-iscsi.org>2012-07-16 20:27:45 -0400
commit1fd032ee10d2816c947f5d5b9abda95e728f0a8f (patch)
tree2a76ad6b466160127dd41ba1d2f6fdb54f412bf2 /drivers/target
parentd6e0175cf3f9737a760482d185bb73566bcc9331 (diff)
target: move code for CDB emulation
Move the existing code in target_core_cdb.c into the files for the command sets that the emulations implement. (roland + nab: Squash patch: Fix range calculation in WRITE SAME emulation when num blocks == 0s) Signed-off-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
Diffstat (limited to 'drivers/target')
-rw-r--r--drivers/target/Makefile1
-rw-r--r--drivers/target/target_core_cdb.c1130
-rw-r--r--drivers/target/target_core_internal.h12
-rw-r--r--drivers/target/target_core_pscsi.c465
-rw-r--r--drivers/target/target_core_sbc.c239
-rw-r--r--drivers/target/target_core_spc.c916
-rw-r--r--drivers/target/target_core_transport.c47
7 files changed, 1152 insertions, 1658 deletions
diff --git a/drivers/target/Makefile b/drivers/target/Makefile
index 50b887b349c0..9fdcb561422f 100644
--- a/drivers/target/Makefile
+++ b/drivers/target/Makefile
@@ -9,7 +9,6 @@ target_core_mod-y := target_core_configfs.o \
9 target_core_tmr.o \ 9 target_core_tmr.o \
10 target_core_tpg.o \ 10 target_core_tpg.o \
11 target_core_transport.o \ 11 target_core_transport.o \
12 target_core_cdb.o \
13 target_core_sbc.o \ 12 target_core_sbc.o \
14 target_core_spc.o \ 13 target_core_spc.o \
15 target_core_ua.o \ 14 target_core_ua.o \
diff --git a/drivers/target/target_core_cdb.c b/drivers/target/target_core_cdb.c
deleted file mode 100644
index 664f6e775d0e..000000000000
--- a/drivers/target/target_core_cdb.c
+++ /dev/null
@@ -1,1130 +0,0 @@
1/*
2 * CDB emulation for non-READ/WRITE commands.
3 *
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
8 *
9 * Nicholas A. Bellinger <nab@kernel.org>
10 *
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.
15 *
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.
20 *
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.
24 */
25
26#include <linux/kernel.h>
27#include <linux/module.h>
28#include <asm/unaligned.h>
29#include <scsi/scsi.h>
30
31#include <target/target_core_base.h>
32#include <target/target_core_backend.h>
33#include <target/target_core_fabric.h>
34
35#include "target_core_internal.h"
36#include "target_core_ua.h"
37
38static void
39target_fill_alua_data(struct se_port *port, unsigned char *buf)
40{
41 struct t10_alua_tg_pt_gp *tg_pt_gp;
42 struct t10_alua_tg_pt_gp_member *tg_pt_gp_mem;
43
44 /*
45 * Set SCCS for MAINTENANCE_IN + REPORT_TARGET_PORT_GROUPS.
46 */
47 buf[5] = 0x80;
48
49 /*
50 * Set TPGS field for explict and/or implict ALUA access type
51 * and opteration.
52 *
53 * See spc4r17 section 6.4.2 Table 135
54 */
55 if (!port)
56 return;
57 tg_pt_gp_mem = port->sep_alua_tg_pt_gp_mem;
58 if (!tg_pt_gp_mem)
59 return;
60
61 spin_lock(&tg_pt_gp_mem->tg_pt_gp_mem_lock);
62 tg_pt_gp = tg_pt_gp_mem->tg_pt_gp;
63 if (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);
66}
67
68static int
69target_emulate_inquiry_std(struct se_cmd *cmd, char *buf)
70{
71 struct se_lun *lun = cmd->se_lun;
72 struct se_device *dev = cmd->se_dev;
73
74 /* Set RMB (removable media) for tape devices */
75 if (dev->transport->get_device_type(dev) == TYPE_TAPE)
76 buf[1] = 0x80;
77
78 buf[2] = dev->transport->get_device_rev(dev);
79
80 /*
81 * NORMACA and HISUP = 0, RESPONSE DATA FORMAT = 2
82 *
83 * SPC4 says:
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
88 * reserved.
89 */
90 buf[3] = 2;
91
92 /*
93 * Enable SCCS and TPGS fields for Emulated ALUA
94 */
95 if (dev->se_sub_dev->t10_alua.alua_type == SPC3_ALUA_EMULATED)
96 target_fill_alua_data(lun->lun_sep, buf);
97
98 buf[7] = 0x2; /* CmdQue=1 */
99
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 */
104
105 return 0;
106}
107
108/* unit serial number */
109static int
110target_emulate_evpd_80(struct se_cmd *cmd, unsigned char *buf)
111{
112 struct se_device *dev = cmd->se_dev;
113 u16 len = 0;
114
115 if (dev->se_sub_dev->su_dev_flags &
116 SDF_EMULATED_VPD_UNIT_SERIAL) {
117 u32 unit_serial_len;
118
119 unit_serial_len = strlen(dev->se_sub_dev->t10_wwn.unit_serial);
120 unit_serial_len++; /* For NULL Terminator */
121
122 len += sprintf(&buf[4], "%s",
123 dev->se_sub_dev->t10_wwn.unit_serial);
124 len++; /* Extra Byte for NULL Terminator */
125 buf[3] = len;
126 }
127 return 0;
128}
129
130static void
131target_parse_naa_6h_vendor_specific(struct se_device *dev, unsigned char *buf)
132{
133 unsigned char *p = &dev->se_sub_dev->t10_wwn.unit_serial[0];
134 int cnt;
135 bool next = true;
136
137 /*
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.
144 */
145 for (cnt = 0; *p && cnt < 13; p++) {
146 int val = hex_to_bin(*p);
147
148 if (val < 0)
149 continue;
150
151 if (next) {
152 next = false;
153 buf[cnt++] |= val;
154 } else {
155 next = true;
156 buf[cnt] = val << 4;
157 }
158 }
159}
160
161/*
162 * Device identification VPD, for a complete list of
163 * DESIGNATOR TYPEs see spc4r17 Table 459.
164 */
165static int
166target_emulate_evpd_83(struct se_cmd *cmd, unsigned char *buf)
167{
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];
176 u32 prod_len;
177 u32 unit_serial_len, off = 0;
178 u16 len = 0, id_len;
179
180 off = 4;
181
182 /*
183 * NAA IEEE Registered Extended Assigned designator format, see
184 * spc4r17 section 7.7.3.6.5
185 *
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.
189 */
190 if (!(dev->se_sub_dev->su_dev_flags & SDF_EMULATED_VPD_UNIT_SERIAL))
191 goto check_t10_vend_desc;
192
193 /* CODE SET == Binary */
194 buf[off++] = 0x1;
195
196 /* Set ASSOCIATION == addressed logical unit: 0)b */
197 buf[off] = 0x00;
198
199 /* Identifier/Designator type == NAA identifier */
200 buf[off++] |= 0x3;
201 off++;
202
203 /* Identifier/Designator length */
204 buf[off++] = 0x10;
205
206 /*
207 * Start NAA IEEE Registered Extended Identifier/Designator
208 */
209 buf[off++] = (0x6 << 4);
210
211 /*
212 * Use OpenFabrics IEEE Company ID: 00 14 05
213 */
214 buf[off++] = 0x01;
215 buf[off++] = 0x40;
216 buf[off] = (0x5 << 4);
217
218 /*
219 * Return ConfigFS Unit Serial Number information for
220 * VENDOR_SPECIFIC_IDENTIFIER and
221 * VENDOR_SPECIFIC_IDENTIFIER_EXTENTION
222 */
223 target_parse_naa_6h_vendor_specific(dev, &buf[off]);
224
225 len = 20;
226 off = (len + 4);
227
228check_t10_vend_desc:
229 /*
230 * T10 Vendor Identifier Page, see spc4r17 section 7.7.3.4
231 */
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 : */
237
238 if (dev->se_sub_dev->su_dev_flags &
239 SDF_EMULATED_VPD_UNIT_SERIAL) {
240 unit_serial_len =
241 strlen(&dev->se_sub_dev->t10_wwn.unit_serial[0]);
242 unit_serial_len++; /* For NULL Terminator */
243
244 id_len += sprintf(&buf[off+12], "%s:%s", prod,
245 &dev->se_sub_dev->t10_wwn.unit_serial[0]);
246 }
247 buf[off] = 0x2; /* ASCII */
248 buf[off+1] = 0x1; /* T10 Vendor ID */
249 buf[off+2] = 0x0;
250 memcpy(&buf[off+4], "LIO-ORG", 8);
251 /* Extra Byte for NULL Terminator */
252 id_len++;
253 /* Identifier Length */
254 buf[off+3] = id_len;
255 /* Header size for Designation descriptor */
256 len += (id_len + 4);
257 off += (id_len + 4);
258 /*
259 * struct se_port is only set for INQUIRY VPD=1 through $FABRIC_MOD
260 */
261 port = lun->lun_sep;
262 if (port) {
263 struct t10_alua_lu_gp *lu_gp;
264 u32 padding, scsi_name_len;
265 u16 lu_gp_id = 0;
266 u16 tg_pt_gp_id = 0;
267 u16 tpgt;
268
269 tpg = port->sep_tpg;
270 /*
271 * Relative target port identifer, see spc4r17
272 * section 7.7.3.7
273 *
274 * Get the PROTOCOL IDENTIFIER as defined by spc4r17
275 * section 7.5.1 Table 362
276 */
277 buf[off] =
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 */
282 buf[off] |= 0x10;
283 /* DESIGNATOR TYPE == Relative target port identifer */
284 buf[off++] |= 0x4;
285 off++; /* Skip over Reserved */
286 buf[off++] = 4; /* DESIGNATOR LENGTH */
287 /* Skip over Obsolete field in RTPI payload
288 * in Table 472 */
289 off += 2;
290 buf[off++] = ((port->sep_rtpi >> 8) & 0xff);
291 buf[off++] = (port->sep_rtpi & 0xff);
292 len += 8; /* Header size + Designation descriptor */
293 /*
294 * Target port group identifier, see spc4r17
295 * section 7.7.3.8
296 *
297 * Get the PROTOCOL IDENTIFIER as defined by spc4r17
298 * section 7.5.1 Table 362
299 */
300 if (dev->se_sub_dev->t10_alua.alua_type !=
301 SPC3_ALUA_EMULATED)
302 goto check_scsi_name;
303
304 tg_pt_gp_mem = port->sep_alua_tg_pt_gp_mem;
305 if (!tg_pt_gp_mem)
306 goto check_lu_gp;
307
308 spin_lock(&tg_pt_gp_mem->tg_pt_gp_mem_lock);
309 tg_pt_gp = tg_pt_gp_mem->tg_pt_gp;
310 if (!tg_pt_gp) {
311 spin_unlock(&tg_pt_gp_mem->tg_pt_gp_mem_lock);
312 goto check_lu_gp;
313 }
314 tg_pt_gp_id = tg_pt_gp->tg_pt_gp_id;
315 spin_unlock(&tg_pt_gp_mem->tg_pt_gp_mem_lock);
316
317 buf[off] =
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 */
322 buf[off] |= 0x10;
323 /* DESIGNATOR TYPE == Target port group identifier */
324 buf[off++] |= 0x5;
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 */
331 /*
332 * Logical Unit Group identifier, see spc4r17
333 * section 7.7.3.8
334 */
335check_lu_gp:
336 lu_gp_mem = dev->dev_alua_lu_gp_mem;
337 if (!lu_gp_mem)
338 goto check_scsi_name;
339
340 spin_lock(&lu_gp_mem->lu_gp_mem_lock);
341 lu_gp = lu_gp_mem->lu_gp;
342 if (!lu_gp) {
343 spin_unlock(&lu_gp_mem->lu_gp_mem_lock);
344 goto check_scsi_name;
345 }
346 lu_gp_id = lu_gp->lu_gp_id;
347 spin_unlock(&lu_gp_mem->lu_gp_mem_lock);
348
349 buf[off++] |= 0x1; /* CODE SET == Binary */
350 /* DESIGNATOR TYPE == Logical Unit Group identifier */
351 buf[off++] |= 0x6;
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 */
358 /*
359 * SCSI name string designator, see spc4r17
360 * section 7.7.3.11
361 *
362 * Get the PROTOCOL IDENTIFIER as defined by spc4r17
363 * section 7.5.1 Table 362
364 */
365check_scsi_name:
366 scsi_name_len = strlen(tpg->se_tpg_tfo->tpg_get_wwn(tpg));
367 /* UTF-8 ",t,0x<16-bit TPGT>" + NULL Terminator */
368 scsi_name_len += 10;
369 /* Check for 4-byte padding */
370 padding = ((-scsi_name_len) & 3);
371 if (padding != 0)
372 scsi_name_len += padding;
373 /* Header size + Designation descriptor */
374 scsi_name_len += 4;
375
376 buf[off] =
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 */
381 buf[off] |= 0x10;
382 /* DESIGNATOR TYPE == SCSI name string */
383 buf[off++] |= 0x8;
384 off += 2; /* Skip over Reserved and length */
385 /*
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
389 * UTF-8 encoding.
390 */
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 */;
395 /*
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
401 * of four.
402 */
403 if (padding)
404 scsi_name_len += padding;
405
406 buf[off-1] = scsi_name_len;
407 off += scsi_name_len;
408 /* Header size + Designation descriptor */
409 len += (scsi_name_len + 4);
410 }
411 buf[2] = ((len >> 8) & 0xff);
412 buf[3] = (len & 0xff); /* Page Length for VPD 0x83 */
413 return 0;
414}
415
416/* Extended INQUIRY Data VPD Page */
417static int
418target_emulate_evpd_86(struct se_cmd *cmd, unsigned char *buf)
419{
420 buf[3] = 0x3c;
421 /* Set HEADSUP, ORDSUP, SIMPSUP */
422 buf[5] = 0x07;
423
424 /* If WriteCache emulation is enabled, set V_SUP */
425 if (cmd->se_dev->se_sub_dev->se_dev_attrib.emulate_write_cache > 0)
426 buf[6] = 0x01;
427 return 0;
428}
429
430/* Block Limits VPD page */
431static int
432target_emulate_evpd_b0(struct se_cmd *cmd, unsigned char *buf)
433{
434 struct se_device *dev = cmd->se_dev;
435 u32 max_sectors;
436 int have_tp = 0;
437
438 /*
439 * Following sbc3r22 section 6.5.3 Block Limits VPD page, when
440 * emulate_tpu=1 or emulate_tpws=1 we will be expect a
441 * different page length for Thin Provisioning.
442 */
443 if (dev->se_sub_dev->se_dev_attrib.emulate_tpu || dev->se_sub_dev->se_dev_attrib.emulate_tpws)
444 have_tp = 1;
445
446 buf[0] = dev->transport->get_device_type(dev);
447 buf[3] = have_tp ? 0x3c : 0x10;
448
449 /* Set WSNZ to 1 */
450 buf[4] = 0x01;
451
452 /*
453 * Set OPTIMAL TRANSFER LENGTH GRANULARITY
454 */
455 put_unaligned_be16(1, &buf[6]);
456
457 /*
458 * Set MAXIMUM TRANSFER LENGTH
459 */
460 max_sectors = min(dev->se_sub_dev->se_dev_attrib.fabric_max_sectors,
461 dev->se_sub_dev->se_dev_attrib.hw_max_sectors);
462 put_unaligned_be32(max_sectors, &buf[8]);
463
464 /*
465 * Set OPTIMAL TRANSFER LENGTH
466 */
467 put_unaligned_be32(dev->se_sub_dev->se_dev_attrib.optimal_sectors, &buf[12]);
468
469 /*
470 * Exit now if we don't support TP.
471 */
472 if (!have_tp)
473 return 0;
474
475 /*
476 * Set MAXIMUM UNMAP LBA COUNT
477 */
478 put_unaligned_be32(dev->se_sub_dev->se_dev_attrib.max_unmap_lba_count, &buf[20]);
479
480 /*
481 * Set MAXIMUM UNMAP BLOCK DESCRIPTOR COUNT
482 */
483 put_unaligned_be32(dev->se_sub_dev->se_dev_attrib.max_unmap_block_desc_count,
484 &buf[24]);
485
486 /*
487 * Set OPTIMAL UNMAP GRANULARITY
488 */
489 put_unaligned_be32(dev->se_sub_dev->se_dev_attrib.unmap_granularity, &buf[28]);
490
491 /*
492 * UNMAP GRANULARITY ALIGNMENT
493 */
494 put_unaligned_be32(dev->se_sub_dev->se_dev_attrib.unmap_granularity_alignment,
495 &buf[32]);
496 if (dev->se_sub_dev->se_dev_attrib.unmap_granularity_alignment != 0)
497 buf[32] |= 0x80; /* Set the UGAVALID bit */
498
499 return 0;
500}
501
502/* Block Device Characteristics VPD page */
503static int
504target_emulate_evpd_b1(struct se_cmd *cmd, unsigned char *buf)
505{
506 struct se_device *dev = cmd->se_dev;
507
508 buf[0] = dev->transport->get_device_type(dev);
509 buf[3] = 0x3c;
510 buf[5] = dev->se_sub_dev->se_dev_attrib.is_nonrot ? 1 : 0;
511
512 return 0;
513}
514
515/* Thin Provisioning VPD */
516static int
517target_emulate_evpd_b2(struct se_cmd *cmd, unsigned char *buf)
518{
519 struct se_device *dev = cmd->se_dev;
520
521 /*
522 * From sbc3r22 section 6.5.4 Thin Provisioning VPD page:
523 *
524 * The PAGE LENGTH field is defined in SPC-4. If the DP bit is set to
525 * zero, then the page length shall be set to 0004h. If the DP bit
526 * is set to one, then the page length shall be set to the value
527 * defined in table 162.
528 */
529 buf[0] = dev->transport->get_device_type(dev);
530
531 /*
532 * Set Hardcoded length mentioned above for DP=0
533 */
534 put_unaligned_be16(0x0004, &buf[2]);
535
536 /*
537 * The THRESHOLD EXPONENT field indicates the threshold set size in
538 * LBAs as a power of 2 (i.e., the threshold set size is equal to
539 * 2(threshold exponent)).
540 *
541 * Note that this is currently set to 0x00 as mkp says it will be
542 * changing again. We can enable this once it has settled in T10
543 * and is actually used by Linux/SCSI ML code.
544 */
545 buf[4] = 0x00;
546
547 /*
548 * A TPU bit set to one indicates that the device server supports
549 * the UNMAP command (see 5.25). A TPU bit set to zero indicates
550 * that the device server does not support the UNMAP command.
551 */
552 if (dev->se_sub_dev->se_dev_attrib.emulate_tpu != 0)
553 buf[5] = 0x80;
554
555 /*
556 * A TPWS bit set to one indicates that the device server supports
557 * the use of the WRITE SAME (16) command (see 5.42) to unmap LBAs.
558 * A TPWS bit set to zero indicates that the device server does not
559 * support the use of the WRITE SAME (16) command to unmap LBAs.
560 */
561 if (dev->se_sub_dev->se_dev_attrib.emulate_tpws != 0)
562 buf[5] |= 0x40;
563
564 return 0;
565}
566
567static int
568target_emulate_evpd_00(struct se_cmd *cmd, unsigned char *buf);
569
570static struct {
571 uint8_t page;
572 int (*emulate)(struct se_cmd *, unsigned char *);
573} evpd_handlers[] = {
574 { .page = 0x00, .emulate = target_emulate_evpd_00 },
575 { .page = 0x80, .emulate = target_emulate_evpd_80 },
576 { .page = 0x83, .emulate = target_emulate_evpd_83 },
577 { .page = 0x86, .emulate = target_emulate_evpd_86 },
578 { .page = 0xb0, .emulate = target_emulate_evpd_b0 },
579 { .page = 0xb1, .emulate = target_emulate_evpd_b1 },
580 { .page = 0xb2, .emulate = target_emulate_evpd_b2 },
581};
582
583/* supported vital product data pages */
584static int
585target_emulate_evpd_00(struct se_cmd *cmd, unsigned char *buf)
586{
587 int p;
588
589 /*
590 * Only report the INQUIRY EVPD=1 pages after a valid NAA
591 * Registered Extended LUN WWN has been set via ConfigFS
592 * during device creation/restart.
593 */
594 if (cmd->se_dev->se_sub_dev->su_dev_flags &
595 SDF_EMULATED_VPD_UNIT_SERIAL) {
596 buf[3] = ARRAY_SIZE(evpd_handlers);
597 for (p = 0; p < ARRAY_SIZE(evpd_handlers); ++p)
598 buf[p + 4] = evpd_handlers[p].page;
599 }
600
601 return 0;
602}
603
604int target_emulate_inquiry(struct se_cmd *cmd)
605{
606 struct se_device *dev = cmd->se_dev;
607 struct se_portal_group *tpg = cmd->se_lun->lun_sep->sep_tpg;
608 unsigned char *buf, *map_buf;
609 unsigned char *cdb = cmd->t_task_cdb;
610 int p, ret;
611
612 map_buf = transport_kmap_data_sg(cmd);
613 /*
614 * If SCF_PASSTHROUGH_SG_TO_MEM_NOALLOC is not set, then we
615 * know we actually allocated a full page. Otherwise, if the
616 * data buffer is too small, allocate a temporary buffer so we
617 * don't have to worry about overruns in all our INQUIRY
618 * emulation handling.
619 */
620 if (cmd->data_length < SE_INQUIRY_BUF &&
621 (cmd->se_cmd_flags & SCF_PASSTHROUGH_SG_TO_MEM_NOALLOC)) {
622 buf = kzalloc(SE_INQUIRY_BUF, GFP_KERNEL);
623 if (!buf) {
624 transport_kunmap_data_sg(cmd);
625 cmd->scsi_sense_reason = TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE;
626 return -ENOMEM;
627 }
628 } else {
629 buf = map_buf;
630 }
631
632 if (dev == tpg->tpg_virt_lun0.lun_se_dev)
633 buf[0] = 0x3f; /* Not connected */
634 else
635 buf[0] = dev->transport->get_device_type(dev);
636
637 if (!(cdb[1] & 0x1)) {
638 if (cdb[2]) {
639 pr_err("INQUIRY with EVPD==0 but PAGE CODE=%02x\n",
640 cdb[2]);
641 cmd->scsi_sense_reason = TCM_INVALID_CDB_FIELD;
642 ret = -EINVAL;
643 goto out;
644 }
645
646 ret = target_emulate_inquiry_std(cmd, buf);
647 goto out;
648 }
649
650 for (p = 0; p < ARRAY_SIZE(evpd_handlers); ++p) {
651 if (cdb[2] == evpd_handlers[p].page) {
652 buf[1] = cdb[2];
653 ret = evpd_handlers[p].emulate(cmd, buf);
654 goto out;
655 }
656 }
657
658 pr_err("Unknown VPD Code: 0x%02x\n", cdb[2]);
659 cmd->scsi_sense_reason = TCM_INVALID_CDB_FIELD;
660 ret = -EINVAL;
661
662out:
663 if (buf != map_buf) {
664 memcpy(map_buf, buf, cmd->data_length);
665 kfree(buf);
666 }
667 transport_kunmap_data_sg(cmd);
668
669 if (!ret)
670 target_complete_cmd(cmd, GOOD);
671 return ret;
672}
673
674int target_emulate_readcapacity(struct se_cmd *cmd)
675{
676 struct se_device *dev = cmd->se_dev;
677 unsigned char *buf;
678 unsigned long long blocks_long = dev->transport->get_blocks(dev);
679 u32 blocks;
680
681 if (blocks_long >= 0x00000000ffffffff)
682 blocks = 0xffffffff;
683 else
684 blocks = (u32)blocks_long;
685
686 buf = transport_kmap_data_sg(cmd);
687
688 buf[0] = (blocks >> 24) & 0xff;
689 buf[1] = (blocks >> 16) & 0xff;
690 buf[2] = (blocks >> 8) & 0xff;
691 buf[3] = blocks & 0xff;
692 buf[4] = (dev->se_sub_dev->se_dev_attrib.block_size >> 24) & 0xff;
693 buf[5] = (dev->se_sub_dev->se_dev_attrib.block_size >> 16) & 0xff;
694 buf[6] = (dev->se_sub_dev->se_dev_attrib.block_size >> 8) & 0xff;
695 buf[7] = dev->se_sub_dev->se_dev_attrib.block_size & 0xff;
696
697 transport_kunmap_data_sg(cmd);
698
699 target_complete_cmd(cmd, GOOD);
700 return 0;
701}
702
703int target_emulate_readcapacity_16(struct se_cmd *cmd)
704{
705 struct se_device *dev = cmd->se_dev;
706 unsigned char *buf;
707 unsigned long long blocks = dev->transport->get_blocks(dev);
708
709 buf = transport_kmap_data_sg(cmd);
710
711 buf[0] = (blocks >> 56) & 0xff;
712 buf[1] = (blocks >> 48) & 0xff;
713 buf[2] = (blocks >> 40) & 0xff;
714 buf[3] = (blocks >> 32) & 0xff;
715 buf[4] = (blocks >> 24) & 0xff;
716 buf[5] = (blocks >> 16) & 0xff;
717 buf[6] = (blocks >> 8) & 0xff;
718 buf[7] = blocks & 0xff;
719 buf[8] = (dev->se_sub_dev->se_dev_attrib.block_size >> 24) & 0xff;
720 buf[9] = (dev->se_sub_dev->se_dev_attrib.block_size >> 16) & 0xff;
721 buf[10] = (dev->se_sub_dev->se_dev_attrib.block_size >> 8) & 0xff;
722 buf[11] = dev->se_sub_dev->se_dev_attrib.block_size & 0xff;
723 /*
724 * Set Thin Provisioning Enable bit following sbc3r22 in section
725 * READ CAPACITY (16) byte 14 if emulate_tpu or emulate_tpws is enabled.
726 */
727 if (dev->se_sub_dev->se_dev_attrib.emulate_tpu || dev->se_sub_dev->se_dev_attrib.emulate_tpws)
728 buf[14] = 0x80;
729
730 transport_kunmap_data_sg(cmd);
731
732 target_complete_cmd(cmd, GOOD);
733 return 0;
734}
735
736static int
737target_modesense_rwrecovery(unsigned char *p)
738{
739 p[0] = 0x01;
740 p[1] = 0x0a;
741
742 return 12;
743}
744
745static int
746target_modesense_control(struct se_device *dev, unsigned char *p)
747{
748 p[0] = 0x0a;
749 p[1] = 0x0a;
750 p[2] = 2;
751 /*
752 * From spc4r23, 7.4.7 Control mode page
753 *
754 * The QUEUE ALGORITHM MODIFIER field (see table 368) specifies
755 * restrictions on the algorithm used for reordering commands
756 * having the SIMPLE task attribute (see SAM-4).
757 *
758 * Table 368 -- QUEUE ALGORITHM MODIFIER field
759 * Code Description
760 * 0h Restricted reordering
761 * 1h Unrestricted reordering allowed
762 * 2h to 7h Reserved
763 * 8h to Fh Vendor specific
764 *
765 * A value of zero in the QUEUE ALGORITHM MODIFIER field specifies that
766 * the device server shall order the processing sequence of commands
767 * having the SIMPLE task attribute such that data integrity is maintained
768 * for that I_T nexus (i.e., if the transmission of new SCSI transport protocol
769 * requests is halted at any time, the final value of all data observable
770 * on the medium shall be the same as if all the commands had been processed
771 * with the ORDERED task attribute).
772 *
773 * A value of one in the QUEUE ALGORITHM MODIFIER field specifies that the
774 * device server may reorder the processing sequence of commands having the
775 * SIMPLE task attribute in any manner. Any data integrity exposures related to
776 * command sequence order shall be explicitly handled by the application client
777 * through the selection of appropriate ommands and task attributes.
778 */
779 p[3] = (dev->se_sub_dev->se_dev_attrib.emulate_rest_reord == 1) ? 0x00 : 0x10;
780 /*
781 * From spc4r17, section 7.4.6 Control mode Page
782 *
783 * Unit Attention interlocks control (UN_INTLCK_CTRL) to code 00b
784 *
785 * 00b: The logical unit shall clear any unit attention condition
786 * reported in the same I_T_L_Q nexus transaction as a CHECK CONDITION
787 * status and shall not establish a unit attention condition when a com-
788 * mand is completed with BUSY, TASK SET FULL, or RESERVATION CONFLICT
789 * status.
790 *
791 * 10b: The logical unit shall not clear any unit attention condition
792 * reported in the same I_T_L_Q nexus transaction as a CHECK CONDITION
793 * status and shall not establish a unit attention condition when
794 * a command is completed with BUSY, TASK SET FULL, or RESERVATION
795 * CONFLICT status.
796 *
797 * 11b a The logical unit shall not clear any unit attention condition
798 * reported in the same I_T_L_Q nexus transaction as a CHECK CONDITION
799 * status and shall establish a unit attention condition for the
800 * initiator port associated with the I_T nexus on which the BUSY,
801 * TASK SET FULL, or RESERVATION CONFLICT status is being returned.
802 * Depending on the status, the additional sense code shall be set to
803 * PREVIOUS BUSY STATUS, PREVIOUS TASK SET FULL STATUS, or PREVIOUS
804 * RESERVATION CONFLICT STATUS. Until it is cleared by a REQUEST SENSE
805 * command, a unit attention condition shall be established only once
806 * for a BUSY, TASK SET FULL, or RESERVATION CONFLICT status regardless
807 * to the number of commands completed with one of those status codes.
808 */
809 p[4] = (dev->se_sub_dev->se_dev_attrib.emulate_ua_intlck_ctrl == 2) ? 0x30 :
810 (dev->se_sub_dev->se_dev_attrib.emulate_ua_intlck_ctrl == 1) ? 0x20 : 0x00;
811 /*
812 * From spc4r17, section 7.4.6 Control mode Page
813 *
814 * Task Aborted Status (TAS) bit set to zero.
815 *
816 * A task aborted status (TAS) bit set to zero specifies that aborted
817 * tasks shall be terminated by the device server without any response
818 * to the application client. A TAS bit set to one specifies that tasks
819 * aborted by the actions of an I_T nexus other than the I_T nexus on
820 * which the command was received shall be completed with TASK ABORTED
821 * status (see SAM-4).
822 */
823 p[5] = (dev->se_sub_dev->se_dev_attrib.emulate_tas) ? 0x40 : 0x00;
824 p[8] = 0xff;
825 p[9] = 0xff;
826 p[11] = 30;
827
828 return 12;
829}
830
831static int
832target_modesense_caching(struct se_device *dev, unsigned char *p)
833{
834 p[0] = 0x08;
835 p[1] = 0x12;
836 if (dev->se_sub_dev->se_dev_attrib.emulate_write_cache > 0)
837 p[2] = 0x04; /* Write Cache Enable */
838 p[12] = 0x20; /* Disabled Read Ahead */
839
840 return 20;
841}
842
843static void
844target_modesense_write_protect(unsigned char *buf, int type)
845{
846 /*
847 * I believe that the WP bit (bit 7) in the mode header is the same for
848 * all device types..
849 */
850 switch (type) {
851 case TYPE_DISK:
852 case TYPE_TAPE:
853 default:
854 buf[0] |= 0x80; /* WP bit */
855 break;
856 }
857}
858
859static void
860target_modesense_dpofua(unsigned char *buf, int type)
861{
862 switch (type) {
863 case TYPE_DISK:
864 buf[0] |= 0x10; /* DPOFUA bit */
865 break;
866 default:
867 break;
868 }
869}
870
871int target_emulate_modesense(struct se_cmd *cmd)
872{
873 struct se_device *dev = cmd->se_dev;
874 char *cdb = cmd->t_task_cdb;
875 unsigned char *rbuf;
876 int type = dev->transport->get_device_type(dev);
877 int ten = (cmd->t_task_cdb[0] == MODE_SENSE_10);
878 int offset = ten ? 8 : 4;
879 int length = 0;
880 unsigned char buf[SE_MODE_PAGE_BUF];
881
882 memset(buf, 0, SE_MODE_PAGE_BUF);
883
884 switch (cdb[2] & 0x3f) {
885 case 0x01:
886 length = target_modesense_rwrecovery(&buf[offset]);
887 break;
888 case 0x08:
889 length = target_modesense_caching(dev, &buf[offset]);
890 break;
891 case 0x0a:
892 length = target_modesense_control(dev, &buf[offset]);
893 break;
894 case 0x3f:
895 length = target_modesense_rwrecovery(&buf[offset]);
896 length += target_modesense_caching(dev, &buf[offset+length]);
897 length += target_modesense_control(dev, &buf[offset+length]);
898 break;
899 default:
900 pr_err("MODE SENSE: unimplemented page/subpage: 0x%02x/0x%02x\n",
901 cdb[2] & 0x3f, cdb[3]);
902 cmd->scsi_sense_reason = TCM_UNKNOWN_MODE_PAGE;
903 return -EINVAL;
904 }
905 offset += length;
906
907 if (ten) {
908 offset -= 2;
909 buf[0] = (offset >> 8) & 0xff;
910 buf[1] = offset & 0xff;
911
912 if ((cmd->se_lun->lun_access & TRANSPORT_LUNFLAGS_READ_ONLY) ||
913 (cmd->se_deve &&
914 (cmd->se_deve->lun_flags & TRANSPORT_LUNFLAGS_READ_ONLY)))
915 target_modesense_write_protect(&buf[3], type);
916
917 if ((dev->se_sub_dev->se_dev_attrib.emulate_write_cache > 0) &&
918 (dev->se_sub_dev->se_dev_attrib.emulate_fua_write > 0))
919 target_modesense_dpofua(&buf[3], type);
920
921 if ((offset + 2) > cmd->data_length)
922 offset = cmd->data_length;
923
924 } else {
925 offset -= 1;
926 buf[0] = offset & 0xff;
927
928 if ((cmd->se_lun->lun_access & TRANSPORT_LUNFLAGS_READ_ONLY) ||
929 (cmd->se_deve &&
930 (cmd->se_deve->lun_flags & TRANSPORT_LUNFLAGS_READ_ONLY)))
931 target_modesense_write_protect(&buf[2], type);
932
933 if ((dev->se_sub_dev->se_dev_attrib.emulate_write_cache > 0) &&
934 (dev->se_sub_dev->se_dev_attrib.emulate_fua_write > 0))
935 target_modesense_dpofua(&buf[2], type);
936
937 if ((offset + 1) > cmd->data_length)
938 offset = cmd->data_length;
939 }
940
941 rbuf = transport_kmap_data_sg(cmd);
942 memcpy(rbuf, buf, offset);
943 transport_kunmap_data_sg(cmd);
944
945 target_complete_cmd(cmd, GOOD);
946 return 0;
947}
948
949int target_emulate_request_sense(struct se_cmd *cmd)
950{
951 unsigned char *cdb = cmd->t_task_cdb;
952 unsigned char *buf;
953 u8 ua_asc = 0, ua_ascq = 0;
954 int err = 0;
955
956 if (cdb[1] & 0x01) {
957 pr_err("REQUEST_SENSE description emulation not"
958 " supported\n");
959 cmd->scsi_sense_reason = TCM_INVALID_CDB_FIELD;
960 return -ENOSYS;
961 }
962
963 buf = transport_kmap_data_sg(cmd);
964
965 if (!core_scsi3_ua_clear_for_request_sense(cmd, &ua_asc, &ua_ascq)) {
966 /*
967 * CURRENT ERROR, UNIT ATTENTION
968 */
969 buf[0] = 0x70;
970 buf[SPC_SENSE_KEY_OFFSET] = UNIT_ATTENTION;
971
972 if (cmd->data_length < 18) {
973 buf[7] = 0x00;
974 err = -EINVAL;
975 goto end;
976 }
977 /*
978 * The Additional Sense Code (ASC) from the UNIT ATTENTION
979 */
980 buf[SPC_ASC_KEY_OFFSET] = ua_asc;
981 buf[SPC_ASCQ_KEY_OFFSET] = ua_ascq;
982 buf[7] = 0x0A;
983 } else {
984 /*
985 * CURRENT ERROR, NO SENSE
986 */
987 buf[0] = 0x70;
988 buf[SPC_SENSE_KEY_OFFSET] = NO_SENSE;
989
990 if (cmd->data_length < 18) {
991 buf[7] = 0x00;
992 err = -EINVAL;
993 goto end;
994 }
995 /*
996 * NO ADDITIONAL SENSE INFORMATION
997 */
998 buf[SPC_ASC_KEY_OFFSET] = 0x00;
999 buf[7] = 0x0A;
1000 }
1001
1002end:
1003 transport_kunmap_data_sg(cmd);
1004 target_complete_cmd(cmd, GOOD);
1005 return 0;
1006}
1007
1008/*
1009 * Used for TCM/IBLOCK and TCM/FILEIO for block/blk-lib.c level discard support.
1010 * Note this is not used for TCM/pSCSI passthrough
1011 */
1012int target_emulate_unmap(struct se_cmd *cmd)
1013{
1014 struct se_device *dev = cmd->se_dev;
1015 unsigned char *buf, *ptr = NULL;
1016 unsigned char *cdb = &cmd->t_task_cdb[0];
1017 sector_t lba;
1018 unsigned int size = cmd->data_length, range;
1019 int ret = 0, offset;
1020 unsigned short dl, bd_dl;
1021
1022 if (!dev->transport->do_discard) {
1023 pr_err("UNMAP emulation not supported for: %s\n",
1024 dev->transport->name);
1025 cmd->scsi_sense_reason = TCM_UNSUPPORTED_SCSI_OPCODE;
1026 return -ENOSYS;
1027 }
1028
1029 /* First UNMAP block descriptor starts at 8 byte offset */
1030 offset = 8;
1031 size -= 8;
1032 dl = get_unaligned_be16(&cdb[0]);
1033 bd_dl = get_unaligned_be16(&cdb[2]);
1034
1035 buf = transport_kmap_data_sg(cmd);
1036
1037 ptr = &buf[offset];
1038 pr_debug("UNMAP: Sub: %s Using dl: %hu bd_dl: %hu size: %hu"
1039 " ptr: %p\n", dev->transport->name, dl, bd_dl, size, ptr);
1040
1041 while (size) {
1042 lba = get_unaligned_be64(&ptr[0]);
1043 range = get_unaligned_be32(&ptr[8]);
1044 pr_debug("UNMAP: Using lba: %llu and range: %u\n",
1045 (unsigned long long)lba, range);
1046
1047 ret = dev->transport->do_discard(dev, lba, range);
1048 if (ret < 0) {
1049 pr_err("blkdev_issue_discard() failed: %d\n",
1050 ret);
1051 goto err;
1052 }
1053
1054 ptr += 16;
1055 size -= 16;
1056 }
1057
1058err:
1059 transport_kunmap_data_sg(cmd);
1060 if (!ret)
1061 target_complete_cmd(cmd, GOOD);
1062 return ret;
1063}
1064
1065/*
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
1068 */
1069int target_emulate_write_same(struct se_cmd *cmd)
1070{
1071 struct se_device *dev = cmd->se_dev;
1072 sector_t range;
1073 sector_t lba = cmd->t_task_lba;
1074 u32 num_blocks;
1075 int ret;
1076
1077 if (!dev->transport->do_discard) {
1078 pr_err("WRITE_SAME emulation not supported"
1079 " for: %s\n", dev->transport->name);
1080 cmd->scsi_sense_reason = TCM_UNSUPPORTED_SCSI_OPCODE;
1081 return -ENOSYS;
1082 }
1083
1084 if (cmd->t_task_cdb[0] == WRITE_SAME)
1085 num_blocks = get_unaligned_be16(&cmd->t_task_cdb[7]);
1086 else if (cmd->t_task_cdb[0] == WRITE_SAME_16)
1087 num_blocks = get_unaligned_be32(&cmd->t_task_cdb[10]);
1088 else /* WRITE_SAME_32 via VARIABLE_LENGTH_CMD */
1089 num_blocks = get_unaligned_be32(&cmd->t_task_cdb[28]);
1090
1091 /*
1092 * Use the explicit range when non zero is supplied, otherwise calculate
1093 * the remaining range based on ->get_blocks() - starting LBA.
1094 */
1095 if (num_blocks != 0)
1096 range = num_blocks;
1097 else
1098 range = (dev->transport->get_blocks(dev) - lba) + 1;
1099
1100 pr_debug("WRITE_SAME UNMAP: LBA: %llu Range: %llu\n",
1101 (unsigned long long)lba, (unsigned long long)range);
1102
1103 ret = dev->transport->do_discard(dev, lba, range);
1104 if (ret < 0) {
1105 pr_debug("blkdev_issue_discard() failed for WRITE_SAME\n");
1106 return ret;
1107 }
1108
1109 target_complete_cmd(cmd, GOOD);
1110 return 0;
1111}
1112
1113int target_emulate_synchronize_cache(struct se_cmd *cmd)
1114{
1115 if (!cmd->se_dev->transport->do_sync_cache) {
1116 pr_err("SYNCHRONIZE_CACHE emulation not supported"
1117 " for: %s\n", cmd->se_dev->transport->name);
1118 cmd->scsi_sense_reason = TCM_UNSUPPORTED_SCSI_OPCODE;
1119 return -ENOSYS;
1120 }
1121
1122 cmd->se_dev->transport->do_sync_cache(cmd);
1123 return 0;
1124}
1125
1126int target_emulate_noop(struct se_cmd *cmd)
1127{
1128 target_complete_cmd(cmd, GOOD);
1129 return 0;
1130}
diff --git a/drivers/target/target_core_internal.h b/drivers/target/target_core_internal.h
index 165e82429687..031c2889f34c 100644
--- a/drivers/target/target_core_internal.h
+++ b/drivers/target/target_core_internal.h
@@ -4,17 +4,6 @@
4/* target_core_alua.c */ 4/* target_core_alua.c */
5extern struct t10_alua_lu_gp *default_lu_gp; 5extern struct t10_alua_lu_gp *default_lu_gp;
6 6
7/* target_core_cdb.c */
8int target_emulate_inquiry(struct se_cmd *cmd);
9int target_emulate_readcapacity(struct se_cmd *cmd);
10int target_emulate_readcapacity_16(struct se_cmd *cmd);
11int target_emulate_modesense(struct se_cmd *cmd);
12int target_emulate_request_sense(struct se_cmd *cmd);
13int target_emulate_unmap(struct se_cmd *cmd);
14int target_emulate_write_same(struct se_cmd *cmd);
15int target_emulate_synchronize_cache(struct se_cmd *cmd);
16int target_emulate_noop(struct se_cmd *cmd);
17
18/* target_core_device.c */ 7/* target_core_device.c */
19struct se_dev_entry *core_get_se_deve_from_rtpi(struct se_node_acl *, u16); 8struct se_dev_entry *core_get_se_deve_from_rtpi(struct se_node_acl *, u16);
20int core_free_device_list_for_node(struct se_node_acl *, 9int core_free_device_list_for_node(struct se_node_acl *,
@@ -116,6 +105,7 @@ int transport_dump_vpd_ident(struct t10_vpd *, unsigned char *, int);
116bool target_stop_cmd(struct se_cmd *cmd, unsigned long *flags); 105bool target_stop_cmd(struct se_cmd *cmd, unsigned long *flags);
117int transport_clear_lun_from_sessions(struct se_lun *); 106int transport_clear_lun_from_sessions(struct se_lun *);
118void transport_send_task_abort(struct se_cmd *); 107void transport_send_task_abort(struct se_cmd *);
108int target_cmd_size_check(struct se_cmd *cmd, unsigned int size);
119 109
120/* target_core_stat.c */ 110/* target_core_stat.c */
121void target_stat_setup_dev_default_groups(struct se_subsystem_dev *); 111void target_stat_setup_dev_default_groups(struct se_subsystem_dev *);
diff --git a/drivers/target/target_core_pscsi.c b/drivers/target/target_core_pscsi.c
index 378da242d841..099c59d31b1f 100644
--- a/drivers/target/target_core_pscsi.c
+++ b/drivers/target/target_core_pscsi.c
@@ -1022,470 +1022,53 @@ fail:
1022 return -ENOMEM; 1022 return -ENOMEM;
1023} 1023}
1024 1024
1025static inline u32 pscsi_get_sectors_6( 1025static int pscsi_parse_cdb(struct se_cmd *cmd)
1026 unsigned char *cdb,
1027 struct se_cmd *cmd,
1028 int *ret)
1029{ 1026{
1030 struct se_device *dev = cmd->se_dev; 1027 unsigned char *cdb = cmd->t_task_cdb;
1031 1028 unsigned int dummy_size;
1032 /* 1029 int ret;
1033 * Assume TYPE_DISK for non struct se_device objects.
1034 * Use 8-bit sector value.
1035 */
1036 if (!dev)
1037 goto type_disk;
1038
1039 /*
1040 * Use 24-bit allocation length for TYPE_TAPE.
1041 */
1042 if (dev->transport->get_device_type(dev) == TYPE_TAPE)
1043 return (u32)(cdb[2] << 16) + (cdb[3] << 8) + cdb[4];
1044
1045 /*
1046 * Everything else assume TYPE_DISK Sector CDB location.
1047 * Use 8-bit sector value. SBC-3 says:
1048 *
1049 * A TRANSFER LENGTH field set to zero specifies that 256
1050 * logical blocks shall be written. Any other value
1051 * specifies the number of logical blocks that shall be
1052 * written.
1053 */
1054type_disk:
1055 return cdb[4] ? : 256;
1056}
1057
1058static inline u32 pscsi_get_sectors_10(
1059 unsigned char *cdb,
1060 struct se_cmd *cmd,
1061 int *ret)
1062{
1063 struct se_device *dev = cmd->se_dev;
1064
1065 /*
1066 * Assume TYPE_DISK for non struct se_device objects.
1067 * Use 16-bit sector value.
1068 */
1069 if (!dev)
1070 goto type_disk;
1071
1072 /*
1073 * XXX_10 is not defined in SSC, throw an exception
1074 */
1075 if (dev->transport->get_device_type(dev) == TYPE_TAPE) {
1076 *ret = -EINVAL;
1077 return 0;
1078 }
1079
1080 /*
1081 * Everything else assume TYPE_DISK Sector CDB location.
1082 * Use 16-bit sector value.
1083 */
1084type_disk:
1085 return (u32)(cdb[7] << 8) + cdb[8];
1086}
1087
1088static inline u32 pscsi_get_sectors_12(
1089 unsigned char *cdb,
1090 struct se_cmd *cmd,
1091 int *ret)
1092{
1093 struct se_device *dev = cmd->se_dev;
1094
1095 /*
1096 * Assume TYPE_DISK for non struct se_device objects.
1097 * Use 32-bit sector value.
1098 */
1099 if (!dev)
1100 goto type_disk;
1101 1030
1102 /* 1031 if (cmd->se_cmd_flags & SCF_BIDI) {
1103 * XXX_12 is not defined in SSC, throw an exception 1032 cmd->se_cmd_flags |= SCF_SCSI_CDB_EXCEPTION;
1104 */ 1033 cmd->scsi_sense_reason = TCM_UNSUPPORTED_SCSI_OPCODE;
1105 if (dev->transport->get_device_type(dev) == TYPE_TAPE) { 1034 return -EINVAL;
1106 *ret = -EINVAL;
1107 return 0;
1108 } 1035 }
1109 1036
1110 /* 1037 /*
1111 * Everything else assume TYPE_DISK Sector CDB location. 1038 * For REPORT LUNS we always need to emulate the respone, and for everything
1112 * Use 32-bit sector value. 1039 * related to persistent reservations and ALUA we might optionally use our
1040 * handlers before passing on the command to the physical hardware.
1113 */ 1041 */
1114type_disk:
1115 return (u32)(cdb[6] << 24) + (cdb[7] << 16) + (cdb[8] << 8) + cdb[9];
1116}
1117
1118static inline u32 pscsi_get_sectors_16(
1119 unsigned char *cdb,
1120 struct se_cmd *cmd,
1121 int *ret)
1122{
1123 struct se_device *dev = cmd->se_dev;
1124
1125 /*
1126 * Assume TYPE_DISK for non struct se_device objects.
1127 * Use 32-bit sector value.
1128 */
1129 if (!dev)
1130 goto type_disk;
1131
1132 /*
1133 * Use 24-bit allocation length for TYPE_TAPE.
1134 */
1135 if (dev->transport->get_device_type(dev) == TYPE_TAPE)
1136 return (u32)(cdb[12] << 16) + (cdb[13] << 8) + cdb[14];
1137
1138type_disk:
1139 return (u32)(cdb[10] << 24) + (cdb[11] << 16) +
1140 (cdb[12] << 8) + cdb[13];
1141}
1142
1143/*
1144 * Used for VARIABLE_LENGTH_CDB WRITE_32 and READ_32 variants
1145 */
1146static inline u32 pscsi_get_sectors_32(
1147 unsigned char *cdb,
1148 struct se_cmd *cmd,
1149 int *ret)
1150{
1151 /*
1152 * Assume TYPE_DISK for non struct se_device objects.
1153 * Use 32-bit sector value.
1154 */
1155 return (u32)(cdb[28] << 24) + (cdb[29] << 16) +
1156 (cdb[30] << 8) + cdb[31];
1157
1158}
1159
1160static inline u32 pscsi_get_lba_21(unsigned char *cdb)
1161{
1162 return ((cdb[1] & 0x1f) << 16) | (cdb[2] << 8) | cdb[3];
1163}
1164
1165static inline u32 pscsi_get_lba_32(unsigned char *cdb)
1166{
1167 return (cdb[2] << 24) | (cdb[3] << 16) | (cdb[4] << 8) | cdb[5];
1168}
1169
1170static inline unsigned long long pscsi_get_lba_64(unsigned char *cdb)
1171{
1172 unsigned int __v1, __v2;
1173
1174 __v1 = (cdb[2] << 24) | (cdb[3] << 16) | (cdb[4] << 8) | cdb[5];
1175 __v2 = (cdb[6] << 24) | (cdb[7] << 16) | (cdb[8] << 8) | cdb[9];
1176
1177 return ((unsigned long long)__v2) | (unsigned long long)__v1 << 32;
1178}
1179
1180/*
1181 * For VARIABLE_LENGTH_CDB w/ 32 byte extended CDBs
1182 */
1183static inline unsigned long long pscsi_get_lba_64_ext(unsigned char *cdb)
1184{
1185 unsigned int __v1, __v2;
1186
1187 __v1 = (cdb[12] << 24) | (cdb[13] << 16) | (cdb[14] << 8) | cdb[15];
1188 __v2 = (cdb[16] << 24) | (cdb[17] << 16) | (cdb[18] << 8) | cdb[19];
1189
1190 return ((unsigned long long)__v2) | (unsigned long long)__v1 << 32;
1191}
1192
1193
1194static inline u32 pscsi_get_size(
1195 u32 sectors,
1196 unsigned char *cdb,
1197 struct se_cmd *cmd)
1198{
1199 struct se_device *dev = cmd->se_dev;
1200
1201 if (dev->transport->get_device_type(dev) == TYPE_TAPE) {
1202 if (cdb[1] & 1) { /* sectors */
1203 return dev->se_sub_dev->se_dev_attrib.block_size * sectors;
1204 } else /* bytes */
1205 return sectors;
1206 }
1207
1208 pr_debug("Returning block_size: %u, sectors: %u == %u for"
1209 " %s object\n", dev->se_sub_dev->se_dev_attrib.block_size,
1210 sectors, dev->se_sub_dev->se_dev_attrib.block_size * sectors,
1211 dev->transport->name);
1212
1213 return dev->se_sub_dev->se_dev_attrib.block_size * sectors;
1214}
1215
1216static int pscsi_parse_cdb(struct se_cmd *cmd, unsigned int *size)
1217{
1218 struct se_device *dev = cmd->se_dev;
1219 struct se_subsystem_dev *su_dev = dev->se_sub_dev;
1220 unsigned char *cdb = cmd->t_task_cdb;
1221 int sector_ret = 0;
1222 u32 sectors = 0;
1223 u16 service_action;
1224 int ret;
1225
1226 if (cmd->se_cmd_flags & SCF_BIDI)
1227 goto out_unsupported_cdb;
1228
1229 switch (cdb[0]) { 1042 switch (cdb[0]) {
1230 case READ_6: 1043 case REPORT_LUNS:
1231 sectors = pscsi_get_sectors_6(cdb, cmd, &sector_ret); 1044 case PERSISTENT_RESERVE_IN:
1232 if (sector_ret) 1045 case PERSISTENT_RESERVE_OUT:
1233 goto out_unsupported_cdb; 1046 case RELEASE:
1234 *size = pscsi_get_size(sectors, cdb, cmd); 1047 case RELEASE_10:
1235 cmd->t_task_lba = pscsi_get_lba_21(cdb); 1048 case RESERVE:
1236 cmd->se_cmd_flags |= SCF_SCSI_DATA_CDB; 1049 case RESERVE_10:
1050 ret = spc_parse_cdb(cmd, &dummy_size);
1051 if (ret)
1052 return ret;
1237 break; 1053 break;
1054 case READ_6:
1238 case READ_10: 1055 case READ_10:
1239 sectors = pscsi_get_sectors_10(cdb, cmd, &sector_ret);
1240 if (sector_ret)
1241 goto out_unsupported_cdb;
1242 *size = pscsi_get_size(sectors, cdb, cmd);
1243 cmd->t_task_lba = pscsi_get_lba_32(cdb);
1244 cmd->se_cmd_flags |= SCF_SCSI_DATA_CDB;
1245 break;
1246 case READ_12: 1056 case READ_12:
1247 sectors = pscsi_get_sectors_12(cdb, cmd, &sector_ret);
1248 if (sector_ret)
1249 goto out_unsupported_cdb;
1250 *size = pscsi_get_size(sectors, cdb, cmd);
1251 cmd->t_task_lba = pscsi_get_lba_32(cdb);
1252 cmd->se_cmd_flags |= SCF_SCSI_DATA_CDB;
1253 break;
1254 case READ_16: 1057 case READ_16:
1255 sectors = pscsi_get_sectors_16(cdb, cmd, &sector_ret);
1256 if (sector_ret)
1257 goto out_unsupported_cdb;
1258 *size = pscsi_get_size(sectors, cdb, cmd);
1259 cmd->t_task_lba = pscsi_get_lba_64(cdb);
1260 cmd->se_cmd_flags |= SCF_SCSI_DATA_CDB;
1261 break;
1262 case WRITE_6: 1058 case WRITE_6:
1263 sectors = pscsi_get_sectors_6(cdb, cmd, &sector_ret);
1264 if (sector_ret)
1265 goto out_unsupported_cdb;
1266 *size = pscsi_get_size(sectors, cdb, cmd);
1267 cmd->t_task_lba = pscsi_get_lba_21(cdb);
1268 cmd->se_cmd_flags |= SCF_SCSI_DATA_CDB;
1269 break;
1270 case WRITE_10: 1059 case WRITE_10:
1271 case WRITE_VERIFY:
1272 sectors = pscsi_get_sectors_10(cdb, cmd, &sector_ret);
1273 if (sector_ret)
1274 goto out_unsupported_cdb;
1275 *size = pscsi_get_size(sectors, cdb, cmd);
1276 cmd->t_task_lba = pscsi_get_lba_32(cdb);
1277 if (cdb[1] & 0x8)
1278 cmd->se_cmd_flags |= SCF_FUA;
1279 cmd->se_cmd_flags |= SCF_SCSI_DATA_CDB;
1280 break;
1281 case WRITE_12: 1060 case WRITE_12:
1282 sectors = pscsi_get_sectors_12(cdb, cmd, &sector_ret);
1283 if (sector_ret)
1284 goto out_unsupported_cdb;
1285 *size = pscsi_get_size(sectors, cdb, cmd);
1286 cmd->t_task_lba = pscsi_get_lba_32(cdb);
1287 if (cdb[1] & 0x8)
1288 cmd->se_cmd_flags |= SCF_FUA;
1289 cmd->se_cmd_flags |= SCF_SCSI_DATA_CDB;
1290 break;
1291 case WRITE_16: 1061 case WRITE_16:
1292 sectors = pscsi_get_sectors_16(cdb, cmd, &sector_ret); 1062 case WRITE_VERIFY:
1293 if (sector_ret)
1294 goto out_unsupported_cdb;
1295 *size = pscsi_get_size(sectors, cdb, cmd);
1296 cmd->t_task_lba = pscsi_get_lba_64(cdb);
1297 if (cdb[1] & 0x8)
1298 cmd->se_cmd_flags |= SCF_FUA;
1299 cmd->se_cmd_flags |= SCF_SCSI_DATA_CDB; 1063 cmd->se_cmd_flags |= SCF_SCSI_DATA_CDB;
1300 break; 1064 break;
1301 case VARIABLE_LENGTH_CMD:
1302 service_action = get_unaligned_be16(&cdb[8]);
1303 switch (service_action) {
1304 case WRITE_SAME_32:
1305 sectors = pscsi_get_sectors_32(cdb, cmd, &sector_ret);
1306 if (sector_ret)
1307 goto out_unsupported_cdb;
1308
1309 if (!sectors) {
1310 pr_err("WSNZ=1, WRITE_SAME w/sectors=0 not"
1311 " supported\n");
1312 goto out_invalid_cdb_field;
1313 }
1314
1315 *size = pscsi_get_size(1, cdb, cmd);
1316 cmd->t_task_lba = get_unaligned_be64(&cdb[12]);
1317 break;
1318 default:
1319 pr_err("VARIABLE_LENGTH_CMD service action"
1320 " 0x%04x not supported\n", service_action);
1321 goto out_unsupported_cdb;
1322 }
1323 break;
1324 case GPCMD_READ_BUFFER_CAPACITY:
1325 case GPCMD_SEND_OPC:
1326 *size = (cdb[7] << 8) + cdb[8];
1327 break;
1328 case READ_BLOCK_LIMITS:
1329 *size = READ_BLOCK_LEN;
1330 break;
1331 case GPCMD_GET_CONFIGURATION:
1332 case GPCMD_READ_FORMAT_CAPACITIES:
1333 case GPCMD_READ_DISC_INFO:
1334 case GPCMD_READ_TRACK_RZONE_INFO:
1335 *size = (cdb[7] << 8) + cdb[8];
1336 break;
1337 case GPCMD_MECHANISM_STATUS:
1338 case GPCMD_READ_DVD_STRUCTURE:
1339 *size = (cdb[8] << 8) + cdb[9];
1340 break;
1341 case READ_POSITION:
1342 *size = READ_POSITION_LEN;
1343 break;
1344 case READ_BUFFER:
1345 *size = (cdb[6] << 16) + (cdb[7] << 8) + cdb[8];
1346 break;
1347 case READ_CAPACITY:
1348 *size = READ_CAP_LEN;
1349 break;
1350 case READ_MEDIA_SERIAL_NUMBER:
1351 case SERVICE_ACTION_IN:
1352 case ACCESS_CONTROL_IN:
1353 case ACCESS_CONTROL_OUT:
1354 *size = (cdb[10] << 24) | (cdb[11] << 16) |
1355 (cdb[12] << 8) | cdb[13];
1356 break;
1357 case READ_TOC:
1358 *size = cdb[8];
1359 break;
1360 case READ_ELEMENT_STATUS:
1361 *size = 65536 * cdb[7] + 256 * cdb[8] + cdb[9];
1362 break;
1363 case SYNCHRONIZE_CACHE:
1364 case SYNCHRONIZE_CACHE_16:
1365 /*
1366 * Extract LBA and range to be flushed for emulated SYNCHRONIZE_CACHE
1367 */
1368 if (cdb[0] == SYNCHRONIZE_CACHE) {
1369 sectors = pscsi_get_sectors_10(cdb, cmd, &sector_ret);
1370 cmd->t_task_lba = pscsi_get_lba_32(cdb);
1371 } else {
1372 sectors = pscsi_get_sectors_16(cdb, cmd, &sector_ret);
1373 cmd->t_task_lba = pscsi_get_lba_64(cdb);
1374 }
1375 if (sector_ret)
1376 goto out_unsupported_cdb;
1377
1378 *size = pscsi_get_size(sectors, cdb, cmd);
1379 break;
1380 case UNMAP:
1381 *size = get_unaligned_be16(&cdb[7]);
1382 break;
1383 case WRITE_SAME_16:
1384 sectors = pscsi_get_sectors_16(cdb, cmd, &sector_ret);
1385 if (sector_ret)
1386 goto out_unsupported_cdb;
1387
1388 if (!sectors) {
1389 pr_err("WSNZ=1, WRITE_SAME w/sectors=0 not supported\n");
1390 goto out_invalid_cdb_field;
1391 }
1392
1393 *size = pscsi_get_size(1, cdb, cmd);
1394 cmd->t_task_lba = get_unaligned_be64(&cdb[2]);
1395 break;
1396 case WRITE_SAME:
1397 sectors = pscsi_get_sectors_10(cdb, cmd, &sector_ret);
1398 if (sector_ret)
1399 goto out_unsupported_cdb;
1400
1401 if (!sectors) {
1402 pr_err("WSNZ=1, WRITE_SAME w/sectors=0 not supported\n");
1403 goto out_invalid_cdb_field;
1404 }
1405
1406 *size = pscsi_get_size(1, cdb, cmd);
1407 cmd->t_task_lba = get_unaligned_be32(&cdb[2]);
1408 break;
1409 case ALLOW_MEDIUM_REMOVAL:
1410 case ERASE:
1411 case REZERO_UNIT:
1412 case SEEK_10:
1413 case SPACE:
1414 case START_STOP:
1415 case VERIFY:
1416 case WRITE_FILEMARKS:
1417 case GPCMD_CLOSE_TRACK:
1418 case INITIALIZE_ELEMENT_STATUS:
1419 case GPCMD_LOAD_UNLOAD:
1420 case GPCMD_SET_SPEED:
1421 case MOVE_MEDIUM:
1422 *size = 0;
1423 break;
1424 case GET_EVENT_STATUS_NOTIFICATION:
1425 *size = (cdb[7] << 8) | cdb[8];
1426 break;
1427 case ATA_16:
1428 switch (cdb[2] & 0x3) { /* T_LENGTH */
1429 case 0x0:
1430 sectors = 0;
1431 break;
1432 case 0x1:
1433 sectors = (((cdb[1] & 0x1) ? cdb[3] : 0) << 8) | cdb[4];
1434 break;
1435 case 0x2:
1436 sectors = (((cdb[1] & 0x1) ? cdb[5] : 0) << 8) | cdb[6];
1437 break;
1438 case 0x3:
1439 pr_err("T_LENGTH=0x3 not supported for ATA_16\n");
1440 goto out_invalid_cdb_field;
1441 }
1442
1443 /* BYTE_BLOCK */
1444 if (cdb[2] & 0x4) {
1445 /* BLOCK T_TYPE: 512 or sector */
1446 *size = sectors * ((cdb[2] & 0x10) ?
1447 dev->se_sub_dev->se_dev_attrib.block_size : 512);
1448 } else {
1449 /* BYTE */
1450 *size = sectors;
1451 }
1452 break;
1453 default: 1065 default:
1454 ret = spc_parse_cdb(cmd, size, true); 1066 break;
1455 if (ret)
1456 return ret;
1457 }
1458
1459 if (cmd->se_cmd_flags & SCF_SCSI_DATA_CDB) {
1460 if (sectors > su_dev->se_dev_attrib.fabric_max_sectors) {
1461 printk_ratelimited(KERN_ERR "SCSI OP %02xh with too"
1462 " big sectors %u exceeds fabric_max_sectors:"
1463 " %u\n", cdb[0], sectors,
1464 su_dev->se_dev_attrib.fabric_max_sectors);
1465 goto out_invalid_cdb_field;
1466 }
1467 if (sectors > su_dev->se_dev_attrib.hw_max_sectors) {
1468 printk_ratelimited(KERN_ERR "SCSI OP %02xh with too"
1469 " big sectors %u exceeds backend hw_max_sectors:"
1470 " %u\n", cdb[0], sectors,
1471 su_dev->se_dev_attrib.hw_max_sectors);
1472 goto out_invalid_cdb_field;
1473 }
1474 } 1067 }
1475 1068
1476 return 0; 1069 return 0;
1477
1478out_unsupported_cdb:
1479 cmd->se_cmd_flags |= SCF_SCSI_CDB_EXCEPTION;
1480 cmd->scsi_sense_reason = TCM_UNSUPPORTED_SCSI_OPCODE;
1481 return -EINVAL;
1482out_invalid_cdb_field:
1483 cmd->se_cmd_flags |= SCF_SCSI_CDB_EXCEPTION;
1484 cmd->scsi_sense_reason = TCM_INVALID_CDB_FIELD;
1485 return -EINVAL;
1486} 1070}
1487 1071
1488
1489static int pscsi_execute_cmd(struct se_cmd *cmd, struct scatterlist *sgl, 1072static int pscsi_execute_cmd(struct se_cmd *cmd, struct scatterlist *sgl,
1490 u32 sgl_nents, enum dma_data_direction data_direction) 1073 u32 sgl_nents, enum dma_data_direction data_direction)
1491{ 1074{
diff --git a/drivers/target/target_core_sbc.c b/drivers/target/target_core_sbc.c
index 9d1ca3814876..a5bd0c0eba08 100644
--- a/drivers/target/target_core_sbc.c
+++ b/drivers/target/target_core_sbc.c
@@ -37,6 +37,192 @@
37#include "target_core_ua.h" 37#include "target_core_ua.h"
38 38
39 39
40static int sbc_emulate_readcapacity(struct se_cmd *cmd)
41{
42 struct se_device *dev = cmd->se_dev;
43 unsigned char *buf;
44 unsigned long long blocks_long = dev->transport->get_blocks(dev);
45 u32 blocks;
46
47 if (blocks_long >= 0x00000000ffffffff)
48 blocks = 0xffffffff;
49 else
50 blocks = (u32)blocks_long;
51
52 buf = transport_kmap_data_sg(cmd);
53
54 buf[0] = (blocks >> 24) & 0xff;
55 buf[1] = (blocks >> 16) & 0xff;
56 buf[2] = (blocks >> 8) & 0xff;
57 buf[3] = blocks & 0xff;
58 buf[4] = (dev->se_sub_dev->se_dev_attrib.block_size >> 24) & 0xff;
59 buf[5] = (dev->se_sub_dev->se_dev_attrib.block_size >> 16) & 0xff;
60 buf[6] = (dev->se_sub_dev->se_dev_attrib.block_size >> 8) & 0xff;
61 buf[7] = dev->se_sub_dev->se_dev_attrib.block_size & 0xff;
62
63 transport_kunmap_data_sg(cmd);
64
65 target_complete_cmd(cmd, GOOD);
66 return 0;
67}
68
69static int sbc_emulate_readcapacity_16(struct se_cmd *cmd)
70{
71 struct se_device *dev = cmd->se_dev;
72 unsigned char *buf;
73 unsigned long long blocks = dev->transport->get_blocks(dev);
74
75 buf = transport_kmap_data_sg(cmd);
76
77 buf[0] = (blocks >> 56) & 0xff;
78 buf[1] = (blocks >> 48) & 0xff;
79 buf[2] = (blocks >> 40) & 0xff;
80 buf[3] = (blocks >> 32) & 0xff;
81 buf[4] = (blocks >> 24) & 0xff;
82 buf[5] = (blocks >> 16) & 0xff;
83 buf[6] = (blocks >> 8) & 0xff;
84 buf[7] = blocks & 0xff;
85 buf[8] = (dev->se_sub_dev->se_dev_attrib.block_size >> 24) & 0xff;
86 buf[9] = (dev->se_sub_dev->se_dev_attrib.block_size >> 16) & 0xff;
87 buf[10] = (dev->se_sub_dev->se_dev_attrib.block_size >> 8) & 0xff;
88 buf[11] = dev->se_sub_dev->se_dev_attrib.block_size & 0xff;
89 /*
90 * Set Thin Provisioning Enable bit following sbc3r22 in section
91 * READ CAPACITY (16) byte 14 if emulate_tpu or emulate_tpws is enabled.
92 */
93 if (dev->se_sub_dev->se_dev_attrib.emulate_tpu || dev->se_sub_dev->se_dev_attrib.emulate_tpws)
94 buf[14] = 0x80;
95
96 transport_kunmap_data_sg(cmd);
97
98 target_complete_cmd(cmd, GOOD);
99 return 0;
100}
101
102/*
103 * Used for TCM/IBLOCK and TCM/FILEIO for block/blk-lib.c level discard support.
104 * Note this is not used for TCM/pSCSI passthrough
105 */
106static int sbc_emulate_unmap(struct se_cmd *cmd)
107{
108 struct se_device *dev = cmd->se_dev;
109 unsigned char *buf, *ptr = NULL;
110 unsigned char *cdb = &cmd->t_task_cdb[0];
111 sector_t lba;
112 unsigned int size = cmd->data_length, range;
113 int ret = 0, offset;
114 unsigned short dl, bd_dl;
115
116 if (!dev->transport->do_discard) {
117 pr_err("UNMAP emulation not supported for: %s\n",
118 dev->transport->name);
119 cmd->scsi_sense_reason = TCM_UNSUPPORTED_SCSI_OPCODE;
120 return -ENOSYS;
121 }
122
123 /* First UNMAP block descriptor starts at 8 byte offset */
124 offset = 8;
125 size -= 8;
126 dl = get_unaligned_be16(&cdb[0]);
127 bd_dl = get_unaligned_be16(&cdb[2]);
128
129 buf = transport_kmap_data_sg(cmd);
130
131 ptr = &buf[offset];
132 pr_debug("UNMAP: Sub: %s Using dl: %hu bd_dl: %hu size: %hu"
133 " ptr: %p\n", dev->transport->name, dl, bd_dl, size, ptr);
134
135 while (size) {
136 lba = get_unaligned_be64(&ptr[0]);
137 range = get_unaligned_be32(&ptr[8]);
138 pr_debug("UNMAP: Using lba: %llu and range: %u\n",
139 (unsigned long long)lba, range);
140
141 ret = dev->transport->do_discard(dev, lba, range);
142 if (ret < 0) {
143 pr_err("blkdev_issue_discard() failed: %d\n",
144 ret);
145 goto err;
146 }
147
148 ptr += 16;
149 size -= 16;
150 }
151
152err:
153 transport_kunmap_data_sg(cmd);
154 if (!ret)
155 target_complete_cmd(cmd, GOOD);
156 return ret;
157}
158
159/*
160 * Used for TCM/IBLOCK and TCM/FILEIO for block/blk-lib.c level discard support.
161 * Note this is not used for TCM/pSCSI passthrough
162 */
163static int sbc_emulate_write_same(struct se_cmd *cmd)
164{
165 struct se_device *dev = cmd->se_dev;
166 sector_t range;
167 sector_t lba = cmd->t_task_lba;
168 u32 num_blocks;
169 int ret;
170
171 if (!dev->transport->do_discard) {
172 pr_err("WRITE_SAME emulation not supported"
173 " for: %s\n", dev->transport->name);
174 cmd->scsi_sense_reason = TCM_UNSUPPORTED_SCSI_OPCODE;
175 return -ENOSYS;
176 }
177
178 if (cmd->t_task_cdb[0] == WRITE_SAME)
179 num_blocks = get_unaligned_be16(&cmd->t_task_cdb[7]);
180 else if (cmd->t_task_cdb[0] == WRITE_SAME_16)
181 num_blocks = get_unaligned_be32(&cmd->t_task_cdb[10]);
182 else /* WRITE_SAME_32 via VARIABLE_LENGTH_CMD */
183 num_blocks = get_unaligned_be32(&cmd->t_task_cdb[28]);
184
185 /*
186 * Use the explicit range when non zero is supplied, otherwise calculate
187 * the remaining range based on ->get_blocks() - starting LBA.
188 */
189 if (num_blocks != 0)
190 range = num_blocks;
191 else
192 range = (dev->transport->get_blocks(dev) - lba) + 1;
193
194 pr_debug("WRITE_SAME UNMAP: LBA: %llu Range: %llu\n",
195 (unsigned long long)lba, (unsigned long long)range);
196
197 ret = dev->transport->do_discard(dev, lba, range);
198 if (ret < 0) {
199 pr_debug("blkdev_issue_discard() failed for WRITE_SAME\n");
200 return ret;
201 }
202
203 target_complete_cmd(cmd, GOOD);
204 return 0;
205}
206
207static int sbc_emulate_synchronize_cache(struct se_cmd *cmd)
208{
209 if (!cmd->se_dev->transport->do_sync_cache) {
210 pr_err("SYNCHRONIZE_CACHE emulation not supported"
211 " for: %s\n", cmd->se_dev->transport->name);
212 cmd->scsi_sense_reason = TCM_UNSUPPORTED_SCSI_OPCODE;
213 return -ENOSYS;
214 }
215
216 cmd->se_dev->transport->do_sync_cache(cmd);
217 return 0;
218}
219
220static int sbc_emulate_verify(struct se_cmd *cmd)
221{
222 target_complete_cmd(cmd, GOOD);
223 return 0;
224}
225
40static inline u32 sbc_get_size(struct se_cmd *cmd, u32 sectors) 226static inline u32 sbc_get_size(struct se_cmd *cmd, u32 sectors)
41{ 227{
42 return cmd->se_dev->se_sub_dev->se_dev_attrib.block_size * sectors; 228 return cmd->se_dev->se_sub_dev->se_dev_attrib.block_size * sectors;
@@ -209,11 +395,12 @@ out:
209 kfree(buf); 395 kfree(buf);
210} 396}
211 397
212int sbc_parse_cdb(struct se_cmd *cmd, unsigned int *size) 398int sbc_parse_cdb(struct se_cmd *cmd)
213{ 399{
214 struct se_subsystem_dev *su_dev = cmd->se_dev->se_sub_dev; 400 struct se_subsystem_dev *su_dev = cmd->se_dev->se_sub_dev;
215 struct se_device *dev = cmd->se_dev; 401 struct se_device *dev = cmd->se_dev;
216 unsigned char *cdb = cmd->t_task_cdb; 402 unsigned char *cdb = cmd->t_task_cdb;
403 unsigned int size;
217 u32 sectors = 0; 404 u32 sectors = 0;
218 int ret; 405 int ret;
219 406
@@ -311,12 +498,12 @@ int sbc_parse_cdb(struct se_cmd *cmd, unsigned int *size)
311 goto out_invalid_cdb_field; 498 goto out_invalid_cdb_field;
312 } 499 }
313 500
314 *size = sbc_get_size(cmd, 1); 501 size = sbc_get_size(cmd, 1);
315 cmd->t_task_lba = get_unaligned_be64(&cdb[12]); 502 cmd->t_task_lba = get_unaligned_be64(&cdb[12]);
316 503
317 if (sbc_write_same_supported(dev, &cdb[10]) < 0) 504 if (sbc_write_same_supported(dev, &cdb[10]) < 0)
318 goto out_unsupported_cdb; 505 goto out_unsupported_cdb;
319 cmd->execute_cmd = target_emulate_write_same; 506 cmd->execute_cmd = sbc_emulate_write_same;
320 break; 507 break;
321 default: 508 default:
322 pr_err("VARIABLE_LENGTH_CMD service action" 509 pr_err("VARIABLE_LENGTH_CMD service action"
@@ -326,20 +513,20 @@ int sbc_parse_cdb(struct se_cmd *cmd, unsigned int *size)
326 break; 513 break;
327 } 514 }
328 case READ_CAPACITY: 515 case READ_CAPACITY:
329 *size = READ_CAP_LEN; 516 size = READ_CAP_LEN;
330 cmd->execute_cmd = target_emulate_readcapacity; 517 cmd->execute_cmd = sbc_emulate_readcapacity;
331 break; 518 break;
332 case SERVICE_ACTION_IN: 519 case SERVICE_ACTION_IN:
333 switch (cmd->t_task_cdb[1] & 0x1f) { 520 switch (cmd->t_task_cdb[1] & 0x1f) {
334 case SAI_READ_CAPACITY_16: 521 case SAI_READ_CAPACITY_16:
335 cmd->execute_cmd = target_emulate_readcapacity_16; 522 cmd->execute_cmd = sbc_emulate_readcapacity_16;
336 break; 523 break;
337 default: 524 default:
338 pr_err("Unsupported SA: 0x%02x\n", 525 pr_err("Unsupported SA: 0x%02x\n",
339 cmd->t_task_cdb[1] & 0x1f); 526 cmd->t_task_cdb[1] & 0x1f);
340 goto out_invalid_cdb_field; 527 goto out_invalid_cdb_field;
341 } 528 }
342 *size = (cdb[10] << 24) | (cdb[11] << 16) | 529 size = (cdb[10] << 24) | (cdb[11] << 16) |
343 (cdb[12] << 8) | cdb[13]; 530 (cdb[12] << 8) | cdb[13];
344 break; 531 break;
345 case SYNCHRONIZE_CACHE: 532 case SYNCHRONIZE_CACHE:
@@ -355,7 +542,7 @@ int sbc_parse_cdb(struct se_cmd *cmd, unsigned int *size)
355 cmd->t_task_lba = transport_lba_64(cdb); 542 cmd->t_task_lba = transport_lba_64(cdb);
356 } 543 }
357 544
358 *size = sbc_get_size(cmd, sectors); 545 size = sbc_get_size(cmd, sectors);
359 546
360 /* 547 /*
361 * Check to ensure that LBA + Range does not exceed past end of 548 * Check to ensure that LBA + Range does not exceed past end of
@@ -365,11 +552,11 @@ int sbc_parse_cdb(struct se_cmd *cmd, unsigned int *size)
365 if (sbc_check_valid_sectors(cmd) < 0) 552 if (sbc_check_valid_sectors(cmd) < 0)
366 goto out_invalid_cdb_field; 553 goto out_invalid_cdb_field;
367 } 554 }
368 cmd->execute_cmd = target_emulate_synchronize_cache; 555 cmd->execute_cmd = sbc_emulate_synchronize_cache;
369 break; 556 break;
370 case UNMAP: 557 case UNMAP:
371 *size = get_unaligned_be16(&cdb[7]); 558 size = get_unaligned_be16(&cdb[7]);
372 cmd->execute_cmd = target_emulate_unmap; 559 cmd->execute_cmd = sbc_emulate_unmap;
373 break; 560 break;
374 case WRITE_SAME_16: 561 case WRITE_SAME_16:
375 sectors = transport_get_sectors_16(cdb); 562 sectors = transport_get_sectors_16(cdb);
@@ -378,12 +565,12 @@ int sbc_parse_cdb(struct se_cmd *cmd, unsigned int *size)
378 goto out_invalid_cdb_field; 565 goto out_invalid_cdb_field;
379 } 566 }
380 567
381 *size = sbc_get_size(cmd, 1); 568 size = sbc_get_size(cmd, 1);
382 cmd->t_task_lba = get_unaligned_be64(&cdb[2]); 569 cmd->t_task_lba = get_unaligned_be64(&cdb[2]);
383 570
384 if (sbc_write_same_supported(dev, &cdb[1]) < 0) 571 if (sbc_write_same_supported(dev, &cdb[1]) < 0)
385 goto out_unsupported_cdb; 572 goto out_unsupported_cdb;
386 cmd->execute_cmd = target_emulate_write_same; 573 cmd->execute_cmd = sbc_emulate_write_same;
387 break; 574 break;
388 case WRITE_SAME: 575 case WRITE_SAME:
389 sectors = transport_get_sectors_10(cdb); 576 sectors = transport_get_sectors_10(cdb);
@@ -392,7 +579,7 @@ int sbc_parse_cdb(struct se_cmd *cmd, unsigned int *size)
392 goto out_invalid_cdb_field; 579 goto out_invalid_cdb_field;
393 } 580 }
394 581
395 *size = sbc_get_size(cmd, 1); 582 size = sbc_get_size(cmd, 1);
396 cmd->t_task_lba = get_unaligned_be32(&cdb[2]); 583 cmd->t_task_lba = get_unaligned_be32(&cdb[2]);
397 584
398 /* 585 /*
@@ -401,14 +588,14 @@ int sbc_parse_cdb(struct se_cmd *cmd, unsigned int *size)
401 */ 588 */
402 if (sbc_write_same_supported(dev, &cdb[1]) < 0) 589 if (sbc_write_same_supported(dev, &cdb[1]) < 0)
403 goto out_unsupported_cdb; 590 goto out_unsupported_cdb;
404 cmd->execute_cmd = target_emulate_write_same; 591 cmd->execute_cmd = sbc_emulate_write_same;
405 break; 592 break;
406 case VERIFY: 593 case VERIFY:
407 *size = 0; 594 size = 0;
408 cmd->execute_cmd = target_emulate_noop; 595 cmd->execute_cmd = sbc_emulate_verify;
409 break; 596 break;
410 default: 597 default:
411 ret = spc_parse_cdb(cmd, size, false); 598 ret = spc_parse_cdb(cmd, &size);
412 if (ret) 599 if (ret)
413 return ret; 600 return ret;
414 } 601 }
@@ -418,6 +605,8 @@ int sbc_parse_cdb(struct se_cmd *cmd, unsigned int *size)
418 goto out_unsupported_cdb; 605 goto out_unsupported_cdb;
419 606
420 if (cmd->se_cmd_flags & SCF_SCSI_DATA_CDB) { 607 if (cmd->se_cmd_flags & SCF_SCSI_DATA_CDB) {
608 unsigned long long end_lba;
609
421 if (sectors > su_dev->se_dev_attrib.fabric_max_sectors) { 610 if (sectors > su_dev->se_dev_attrib.fabric_max_sectors) {
422 printk_ratelimited(KERN_ERR "SCSI OP %02xh with too" 611 printk_ratelimited(KERN_ERR "SCSI OP %02xh with too"
423 " big sectors %u exceeds fabric_max_sectors:" 612 " big sectors %u exceeds fabric_max_sectors:"
@@ -433,9 +622,21 @@ int sbc_parse_cdb(struct se_cmd *cmd, unsigned int *size)
433 goto out_invalid_cdb_field; 622 goto out_invalid_cdb_field;
434 } 623 }
435 624
436 *size = sbc_get_size(cmd, sectors); 625 end_lba = dev->transport->get_blocks(dev) + 1;
626 if (cmd->t_task_lba + sectors > end_lba) {
627 pr_err("cmd exceeds last lba %llu "
628 "(lba %llu, sectors %u)\n",
629 end_lba, cmd->t_task_lba, sectors);
630 goto out_invalid_cdb_field;
631 }
632
633 size = sbc_get_size(cmd, sectors);
437 } 634 }
438 635
636 ret = target_cmd_size_check(cmd, size);
637 if (ret < 0)
638 return ret;
639
439 return 0; 640 return 0;
440 641
441out_unsupported_cdb: 642out_unsupported_cdb:
diff --git a/drivers/target/target_core_spc.c b/drivers/target/target_core_spc.c
index 156291fbf6d8..96dcb57089f7 100644
--- a/drivers/target/target_core_spc.c
+++ b/drivers/target/target_core_spc.c
@@ -39,7 +39,906 @@
39#include "target_core_ua.h" 39#include "target_core_ua.h"
40 40
41 41
42int spc_parse_cdb(struct se_cmd *cmd, unsigned int *size, bool passthrough) 42static void spc_fill_alua_data(struct se_port *port, unsigned char *buf)
43{
44 struct t10_alua_tg_pt_gp *tg_pt_gp;
45 struct t10_alua_tg_pt_gp_member *tg_pt_gp_mem;
46
47 /*
48 * Set SCCS for MAINTENANCE_IN + REPORT_TARGET_PORT_GROUPS.
49 */
50 buf[5] = 0x80;
51
52 /*
53 * Set TPGS field for explict and/or implict ALUA access type
54 * and opteration.
55 *
56 * See spc4r17 section 6.4.2 Table 135
57 */
58 if (!port)
59 return;
60 tg_pt_gp_mem = port->sep_alua_tg_pt_gp_mem;
61 if (!tg_pt_gp_mem)
62 return;
63
64 spin_lock(&tg_pt_gp_mem->tg_pt_gp_mem_lock);
65 tg_pt_gp = tg_pt_gp_mem->tg_pt_gp;
66 if (tg_pt_gp)
67 buf[5] |= tg_pt_gp->tg_pt_gp_alua_access_type;
68 spin_unlock(&tg_pt_gp_mem->tg_pt_gp_mem_lock);
69}
70
71static int spc_emulate_inquiry_std(struct se_cmd *cmd, char *buf)
72{
73 struct se_lun *lun = cmd->se_lun;
74 struct se_device *dev = cmd->se_dev;
75
76 /* Set RMB (removable media) for tape devices */
77 if (dev->transport->get_device_type(dev) == TYPE_TAPE)
78 buf[1] = 0x80;
79
80 buf[2] = dev->transport->get_device_rev(dev);
81
82 /*
83 * NORMACA and HISUP = 0, RESPONSE DATA FORMAT = 2
84 *
85 * SPC4 says:
86 * A RESPONSE DATA FORMAT field set to 2h indicates that the
87 * standard INQUIRY data is in the format defined in this
88 * standard. Response data format values less than 2h are
89 * obsolete. Response data format values greater than 2h are
90 * reserved.
91 */
92 buf[3] = 2;
93
94 /*
95 * Enable SCCS and TPGS fields for Emulated ALUA
96 */
97 if (dev->se_sub_dev->t10_alua.alua_type == SPC3_ALUA_EMULATED)
98 spc_fill_alua_data(lun->lun_sep, buf);
99
100 buf[7] = 0x2; /* CmdQue=1 */
101
102 snprintf(&buf[8], 8, "LIO-ORG");
103 snprintf(&buf[16], 16, "%s", dev->se_sub_dev->t10_wwn.model);
104 snprintf(&buf[32], 4, "%s", dev->se_sub_dev->t10_wwn.revision);
105 buf[4] = 31; /* Set additional length to 31 */
106
107 return 0;
108}
109
110/* unit serial number */
111static int spc_emulate_evpd_80(struct se_cmd *cmd, unsigned char *buf)
112{
113 struct se_device *dev = cmd->se_dev;
114 u16 len = 0;
115
116 if (dev->se_sub_dev->su_dev_flags &
117 SDF_EMULATED_VPD_UNIT_SERIAL) {
118 u32 unit_serial_len;
119
120 unit_serial_len = strlen(dev->se_sub_dev->t10_wwn.unit_serial);
121 unit_serial_len++; /* For NULL Terminator */
122
123 len += sprintf(&buf[4], "%s",
124 dev->se_sub_dev->t10_wwn.unit_serial);
125 len++; /* Extra Byte for NULL Terminator */
126 buf[3] = len;
127 }
128 return 0;
129}
130
131static void spc_parse_naa_6h_vendor_specific(struct se_device *dev,
132 unsigned char *buf)
133{
134 unsigned char *p = &dev->se_sub_dev->t10_wwn.unit_serial[0];
135 int cnt;
136 bool next = true;
137
138 /*
139 * Generate up to 36 bits of VENDOR SPECIFIC IDENTIFIER starting on
140 * byte 3 bit 3-0 for NAA IEEE Registered Extended DESIGNATOR field
141 * format, followed by 64 bits of VENDOR SPECIFIC IDENTIFIER EXTENSION
142 * to complete the payload. These are based from VPD=0x80 PRODUCT SERIAL
143 * NUMBER set via vpd_unit_serial in target_core_configfs.c to ensure
144 * per device uniqeness.
145 */
146 for (cnt = 0; *p && cnt < 13; p++) {
147 int val = hex_to_bin(*p);
148
149 if (val < 0)
150 continue;
151
152 if (next) {
153 next = false;
154 buf[cnt++] |= val;
155 } else {
156 next = true;
157 buf[cnt] = val << 4;
158 }
159 }
160}
161
162/*
163 * Device identification VPD, for a complete list of
164 * DESIGNATOR TYPEs see spc4r17 Table 459.
165 */
166static int spc_emulate_evpd_83(struct se_cmd *cmd, unsigned char *buf)
167{
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];
176 u32 prod_len;
177 u32 unit_serial_len, off = 0;
178 u16 len = 0, id_len;
179
180 off = 4;
181
182 /*
183 * NAA IEEE Registered Extended Assigned designator format, see
184 * spc4r17 section 7.7.3.6.5
185 *
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.
189 */
190 if (!(dev->se_sub_dev->su_dev_flags & SDF_EMULATED_VPD_UNIT_SERIAL))
191 goto check_t10_vend_desc;
192
193 /* CODE SET == Binary */
194 buf[off++] = 0x1;
195
196 /* Set ASSOCIATION == addressed logical unit: 0)b */
197 buf[off] = 0x00;
198
199 /* Identifier/Designator type == NAA identifier */
200 buf[off++] |= 0x3;
201 off++;
202
203 /* Identifier/Designator length */
204 buf[off++] = 0x10;
205
206 /*
207 * Start NAA IEEE Registered Extended Identifier/Designator
208 */
209 buf[off++] = (0x6 << 4);
210
211 /*
212 * Use OpenFabrics IEEE Company ID: 00 14 05
213 */
214 buf[off++] = 0x01;
215 buf[off++] = 0x40;
216 buf[off] = (0x5 << 4);
217
218 /*
219 * Return ConfigFS Unit Serial Number information for
220 * VENDOR_SPECIFIC_IDENTIFIER and
221 * VENDOR_SPECIFIC_IDENTIFIER_EXTENTION
222 */
223 spc_parse_naa_6h_vendor_specific(dev, &buf[off]);
224
225 len = 20;
226 off = (len + 4);
227
228check_t10_vend_desc:
229 /*
230 * T10 Vendor Identifier Page, see spc4r17 section 7.7.3.4
231 */
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 : */
237
238 if (dev->se_sub_dev->su_dev_flags &
239 SDF_EMULATED_VPD_UNIT_SERIAL) {
240 unit_serial_len =
241 strlen(&dev->se_sub_dev->t10_wwn.unit_serial[0]);
242 unit_serial_len++; /* For NULL Terminator */
243
244 id_len += sprintf(&buf[off+12], "%s:%s", prod,
245 &dev->se_sub_dev->t10_wwn.unit_serial[0]);
246 }
247 buf[off] = 0x2; /* ASCII */
248 buf[off+1] = 0x1; /* T10 Vendor ID */
249 buf[off+2] = 0x0;
250 memcpy(&buf[off+4], "LIO-ORG", 8);
251 /* Extra Byte for NULL Terminator */
252 id_len++;
253 /* Identifier Length */
254 buf[off+3] = id_len;
255 /* Header size for Designation descriptor */
256 len += (id_len + 4);
257 off += (id_len + 4);
258 /*
259 * struct se_port is only set for INQUIRY VPD=1 through $FABRIC_MOD
260 */
261 port = lun->lun_sep;
262 if (port) {
263 struct t10_alua_lu_gp *lu_gp;
264 u32 padding, scsi_name_len;
265 u16 lu_gp_id = 0;
266 u16 tg_pt_gp_id = 0;
267 u16 tpgt;
268
269 tpg = port->sep_tpg;
270 /*
271 * Relative target port identifer, see spc4r17
272 * section 7.7.3.7
273 *
274 * Get the PROTOCOL IDENTIFIER as defined by spc4r17
275 * section 7.5.1 Table 362
276 */
277 buf[off] =
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 */
282 buf[off] |= 0x10;
283 /* DESIGNATOR TYPE == Relative target port identifer */
284 buf[off++] |= 0x4;
285 off++; /* Skip over Reserved */
286 buf[off++] = 4; /* DESIGNATOR LENGTH */
287 /* Skip over Obsolete field in RTPI payload
288 * in Table 472 */
289 off += 2;
290 buf[off++] = ((port->sep_rtpi >> 8) & 0xff);
291 buf[off++] = (port->sep_rtpi & 0xff);
292 len += 8; /* Header size + Designation descriptor */
293 /*
294 * Target port group identifier, see spc4r17
295 * section 7.7.3.8
296 *
297 * Get the PROTOCOL IDENTIFIER as defined by spc4r17
298 * section 7.5.1 Table 362
299 */
300 if (dev->se_sub_dev->t10_alua.alua_type !=
301 SPC3_ALUA_EMULATED)
302 goto check_scsi_name;
303
304 tg_pt_gp_mem = port->sep_alua_tg_pt_gp_mem;
305 if (!tg_pt_gp_mem)
306 goto check_lu_gp;
307
308 spin_lock(&tg_pt_gp_mem->tg_pt_gp_mem_lock);
309 tg_pt_gp = tg_pt_gp_mem->tg_pt_gp;
310 if (!tg_pt_gp) {
311 spin_unlock(&tg_pt_gp_mem->tg_pt_gp_mem_lock);
312 goto check_lu_gp;
313 }
314 tg_pt_gp_id = tg_pt_gp->tg_pt_gp_id;
315 spin_unlock(&tg_pt_gp_mem->tg_pt_gp_mem_lock);
316
317 buf[off] =
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 */
322 buf[off] |= 0x10;
323 /* DESIGNATOR TYPE == Target port group identifier */
324 buf[off++] |= 0x5;
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 */
331 /*
332 * Logical Unit Group identifier, see spc4r17
333 * section 7.7.3.8
334 */
335check_lu_gp:
336 lu_gp_mem = dev->dev_alua_lu_gp_mem;
337 if (!lu_gp_mem)
338 goto check_scsi_name;
339
340 spin_lock(&lu_gp_mem->lu_gp_mem_lock);
341 lu_gp = lu_gp_mem->lu_gp;
342 if (!lu_gp) {
343 spin_unlock(&lu_gp_mem->lu_gp_mem_lock);
344 goto check_scsi_name;
345 }
346 lu_gp_id = lu_gp->lu_gp_id;
347 spin_unlock(&lu_gp_mem->lu_gp_mem_lock);
348
349 buf[off++] |= 0x1; /* CODE SET == Binary */
350 /* DESIGNATOR TYPE == Logical Unit Group identifier */
351 buf[off++] |= 0x6;
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 */
358 /*
359 * SCSI name string designator, see spc4r17
360 * section 7.7.3.11
361 *
362 * Get the PROTOCOL IDENTIFIER as defined by spc4r17
363 * section 7.5.1 Table 362
364 */
365check_scsi_name:
366 scsi_name_len = strlen(tpg->se_tpg_tfo->tpg_get_wwn(tpg));
367 /* UTF-8 ",t,0x<16-bit TPGT>" + NULL Terminator */
368 scsi_name_len += 10;
369 /* Check for 4-byte padding */
370 padding = ((-scsi_name_len) & 3);
371 if (padding != 0)
372 scsi_name_len += padding;
373 /* Header size + Designation descriptor */
374 scsi_name_len += 4;
375
376 buf[off] =
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 */
381 buf[off] |= 0x10;
382 /* DESIGNATOR TYPE == SCSI name string */
383 buf[off++] |= 0x8;
384 off += 2; /* Skip over Reserved and length */
385 /*
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
389 * UTF-8 encoding.
390 */
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 */;
395 /*
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
401 * of four.
402 */
403 if (padding)
404 scsi_name_len += padding;
405
406 buf[off-1] = scsi_name_len;
407 off += scsi_name_len;
408 /* Header size + Designation descriptor */
409 len += (scsi_name_len + 4);
410 }
411 buf[2] = ((len >> 8) & 0xff);
412 buf[3] = (len & 0xff); /* Page Length for VPD 0x83 */
413 return 0;
414}
415
416/* Extended INQUIRY Data VPD Page */
417static int spc_emulate_evpd_86(struct se_cmd *cmd, unsigned char *buf)
418{
419 buf[3] = 0x3c;
420 /* Set HEADSUP, ORDSUP, SIMPSUP */
421 buf[5] = 0x07;
422
423 /* If WriteCache emulation is enabled, set V_SUP */
424 if (cmd->se_dev->se_sub_dev->se_dev_attrib.emulate_write_cache > 0)
425 buf[6] = 0x01;
426 return 0;
427}
428
429/* Block Limits VPD page */
430static int spc_emulate_evpd_b0(struct se_cmd *cmd, unsigned char *buf)
431{
432 struct se_device *dev = cmd->se_dev;
433 u32 max_sectors;
434 int have_tp = 0;
435
436 /*
437 * Following spc3r22 section 6.5.3 Block Limits VPD page, when
438 * emulate_tpu=1 or emulate_tpws=1 we will be expect a
439 * different page length for Thin Provisioning.
440 */
441 if (dev->se_sub_dev->se_dev_attrib.emulate_tpu || dev->se_sub_dev->se_dev_attrib.emulate_tpws)
442 have_tp = 1;
443
444 buf[0] = dev->transport->get_device_type(dev);
445 buf[3] = have_tp ? 0x3c : 0x10;
446
447 /* Set WSNZ to 1 */
448 buf[4] = 0x01;
449
450 /*
451 * Set OPTIMAL TRANSFER LENGTH GRANULARITY
452 */
453 put_unaligned_be16(1, &buf[6]);
454
455 /*
456 * Set MAXIMUM TRANSFER LENGTH
457 */
458 max_sectors = min(dev->se_sub_dev->se_dev_attrib.fabric_max_sectors,
459 dev->se_sub_dev->se_dev_attrib.hw_max_sectors);
460 put_unaligned_be32(max_sectors, &buf[8]);
461
462 /*
463 * Set OPTIMAL TRANSFER LENGTH
464 */
465 put_unaligned_be32(dev->se_sub_dev->se_dev_attrib.optimal_sectors, &buf[12]);
466
467 /*
468 * Exit now if we don't support TP.
469 */
470 if (!have_tp)
471 return 0;
472
473 /*
474 * Set MAXIMUM UNMAP LBA COUNT
475 */
476 put_unaligned_be32(dev->se_sub_dev->se_dev_attrib.max_unmap_lba_count, &buf[20]);
477
478 /*
479 * Set MAXIMUM UNMAP BLOCK DESCRIPTOR COUNT
480 */
481 put_unaligned_be32(dev->se_sub_dev->se_dev_attrib.max_unmap_block_desc_count,
482 &buf[24]);
483
484 /*
485 * Set OPTIMAL UNMAP GRANULARITY
486 */
487 put_unaligned_be32(dev->se_sub_dev->se_dev_attrib.unmap_granularity, &buf[28]);
488
489 /*
490 * UNMAP GRANULARITY ALIGNMENT
491 */
492 put_unaligned_be32(dev->se_sub_dev->se_dev_attrib.unmap_granularity_alignment,
493 &buf[32]);
494 if (dev->se_sub_dev->se_dev_attrib.unmap_granularity_alignment != 0)
495 buf[32] |= 0x80; /* Set the UGAVALID bit */
496
497 return 0;
498}
499
500/* Block Device Characteristics VPD page */
501static int spc_emulate_evpd_b1(struct se_cmd *cmd, unsigned char *buf)
502{
503 struct se_device *dev = cmd->se_dev;
504
505 buf[0] = dev->transport->get_device_type(dev);
506 buf[3] = 0x3c;
507 buf[5] = dev->se_sub_dev->se_dev_attrib.is_nonrot ? 1 : 0;
508
509 return 0;
510}
511
512/* Thin Provisioning VPD */
513static int spc_emulate_evpd_b2(struct se_cmd *cmd, unsigned char *buf)
514{
515 struct se_device *dev = cmd->se_dev;
516
517 /*
518 * From spc3r22 section 6.5.4 Thin Provisioning VPD page:
519 *
520 * The PAGE LENGTH field is defined in SPC-4. If the DP bit is set to
521 * zero, then the page length shall be set to 0004h. If the DP bit
522 * is set to one, then the page length shall be set to the value
523 * defined in table 162.
524 */
525 buf[0] = dev->transport->get_device_type(dev);
526
527 /*
528 * Set Hardcoded length mentioned above for DP=0
529 */
530 put_unaligned_be16(0x0004, &buf[2]);
531
532 /*
533 * The THRESHOLD EXPONENT field indicates the threshold set size in
534 * LBAs as a power of 2 (i.e., the threshold set size is equal to
535 * 2(threshold exponent)).
536 *
537 * Note that this is currently set to 0x00 as mkp says it will be
538 * changing again. We can enable this once it has settled in T10
539 * and is actually used by Linux/SCSI ML code.
540 */
541 buf[4] = 0x00;
542
543 /*
544 * A TPU bit set to one indicates that the device server supports
545 * the UNMAP command (see 5.25). A TPU bit set to zero indicates
546 * that the device server does not support the UNMAP command.
547 */
548 if (dev->se_sub_dev->se_dev_attrib.emulate_tpu != 0)
549 buf[5] = 0x80;
550
551 /*
552 * A TPWS bit set to one indicates that the device server supports
553 * the use of the WRITE SAME (16) command (see 5.42) to unmap LBAs.
554 * A TPWS bit set to zero indicates that the device server does not
555 * support the use of the WRITE SAME (16) command to unmap LBAs.
556 */
557 if (dev->se_sub_dev->se_dev_attrib.emulate_tpws != 0)
558 buf[5] |= 0x40;
559
560 return 0;
561}
562
563static int spc_emulate_evpd_00(struct se_cmd *cmd, unsigned char *buf);
564
565static struct {
566 uint8_t page;
567 int (*emulate)(struct se_cmd *, unsigned char *);
568} evpd_handlers[] = {
569 { .page = 0x00, .emulate = spc_emulate_evpd_00 },
570 { .page = 0x80, .emulate = spc_emulate_evpd_80 },
571 { .page = 0x83, .emulate = spc_emulate_evpd_83 },
572 { .page = 0x86, .emulate = spc_emulate_evpd_86 },
573 { .page = 0xb0, .emulate = spc_emulate_evpd_b0 },
574 { .page = 0xb1, .emulate = spc_emulate_evpd_b1 },
575 { .page = 0xb2, .emulate = spc_emulate_evpd_b2 },
576};
577
578/* supported vital product data pages */
579static int spc_emulate_evpd_00(struct se_cmd *cmd, unsigned char *buf)
580{
581 int p;
582
583 /*
584 * Only report the INQUIRY EVPD=1 pages after a valid NAA
585 * Registered Extended LUN WWN has been set via ConfigFS
586 * during device creation/restart.
587 */
588 if (cmd->se_dev->se_sub_dev->su_dev_flags &
589 SDF_EMULATED_VPD_UNIT_SERIAL) {
590 buf[3] = ARRAY_SIZE(evpd_handlers);
591 for (p = 0; p < ARRAY_SIZE(evpd_handlers); ++p)
592 buf[p + 4] = evpd_handlers[p].page;
593 }
594
595 return 0;
596}
597
598static int spc_emulate_inquiry(struct se_cmd *cmd)
599{
600 struct se_device *dev = cmd->se_dev;
601 struct se_portal_group *tpg = cmd->se_lun->lun_sep->sep_tpg;
602 unsigned char *buf, *map_buf;
603 unsigned char *cdb = cmd->t_task_cdb;
604 int p, ret;
605
606 map_buf = transport_kmap_data_sg(cmd);
607 /*
608 * If SCF_PASSTHROUGH_SG_TO_MEM_NOALLOC is not set, then we
609 * know we actually allocated a full page. Otherwise, if the
610 * data buffer is too small, allocate a temporary buffer so we
611 * don't have to worry about overruns in all our INQUIRY
612 * emulation handling.
613 */
614 if (cmd->data_length < SE_INQUIRY_BUF &&
615 (cmd->se_cmd_flags & SCF_PASSTHROUGH_SG_TO_MEM_NOALLOC)) {
616 buf = kzalloc(SE_INQUIRY_BUF, GFP_KERNEL);
617 if (!buf) {
618 transport_kunmap_data_sg(cmd);
619 cmd->scsi_sense_reason = TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE;
620 return -ENOMEM;
621 }
622 } else {
623 buf = map_buf;
624 }
625
626 if (dev == tpg->tpg_virt_lun0.lun_se_dev)
627 buf[0] = 0x3f; /* Not connected */
628 else
629 buf[0] = dev->transport->get_device_type(dev);
630
631 if (!(cdb[1] & 0x1)) {
632 if (cdb[2]) {
633 pr_err("INQUIRY with EVPD==0 but PAGE CODE=%02x\n",
634 cdb[2]);
635 cmd->scsi_sense_reason = TCM_INVALID_CDB_FIELD;
636 ret = -EINVAL;
637 goto out;
638 }
639
640 ret = spc_emulate_inquiry_std(cmd, buf);
641 goto out;
642 }
643
644 for (p = 0; p < ARRAY_SIZE(evpd_handlers); ++p) {
645 if (cdb[2] == evpd_handlers[p].page) {
646 buf[1] = cdb[2];
647 ret = evpd_handlers[p].emulate(cmd, buf);
648 goto out;
649 }
650 }
651
652 pr_err("Unknown VPD Code: 0x%02x\n", cdb[2]);
653 cmd->scsi_sense_reason = TCM_INVALID_CDB_FIELD;
654 ret = -EINVAL;
655
656out:
657 if (buf != map_buf) {
658 memcpy(map_buf, buf, cmd->data_length);
659 kfree(buf);
660 }
661 transport_kunmap_data_sg(cmd);
662
663 if (!ret)
664 target_complete_cmd(cmd, GOOD);
665 return ret;
666}
667
668static int spc_modesense_rwrecovery(unsigned char *p)
669{
670 p[0] = 0x01;
671 p[1] = 0x0a;
672
673 return 12;
674}
675
676static int spc_modesense_control(struct se_device *dev, unsigned char *p)
677{
678 p[0] = 0x0a;
679 p[1] = 0x0a;
680 p[2] = 2;
681 /*
682 * From spc4r23, 7.4.7 Control mode page
683 *
684 * The QUEUE ALGORITHM MODIFIER field (see table 368) specifies
685 * restrictions on the algorithm used for reordering commands
686 * having the SIMPLE task attribute (see SAM-4).
687 *
688 * Table 368 -- QUEUE ALGORITHM MODIFIER field
689 * Code Description
690 * 0h Restricted reordering
691 * 1h Unrestricted reordering allowed
692 * 2h to 7h Reserved
693 * 8h to Fh Vendor specific
694 *
695 * A value of zero in the QUEUE ALGORITHM MODIFIER field specifies that
696 * the device server shall order the processing sequence of commands
697 * having the SIMPLE task attribute such that data integrity is maintained
698 * for that I_T nexus (i.e., if the transmission of new SCSI transport protocol
699 * requests is halted at any time, the final value of all data observable
700 * on the medium shall be the same as if all the commands had been processed
701 * with the ORDERED task attribute).
702 *
703 * A value of one in the QUEUE ALGORITHM MODIFIER field specifies that the
704 * device server may reorder the processing sequence of commands having the
705 * SIMPLE task attribute in any manner. Any data integrity exposures related to
706 * command sequence order shall be explicitly handled by the application client
707 * through the selection of appropriate ommands and task attributes.
708 */
709 p[3] = (dev->se_sub_dev->se_dev_attrib.emulate_rest_reord == 1) ? 0x00 : 0x10;
710 /*
711 * From spc4r17, section 7.4.6 Control mode Page
712 *
713 * Unit Attention interlocks control (UN_INTLCK_CTRL) to code 00b
714 *
715 * 00b: The logical unit shall clear any unit attention condition
716 * reported in the same I_T_L_Q nexus transaction as a CHECK CONDITION
717 * status and shall not establish a unit attention condition when a com-
718 * mand is completed with BUSY, TASK SET FULL, or RESERVATION CONFLICT
719 * status.
720 *
721 * 10b: The logical unit shall not clear any unit attention condition
722 * reported in the same I_T_L_Q nexus transaction as a CHECK CONDITION
723 * status and shall not establish a unit attention condition when
724 * a command is completed with BUSY, TASK SET FULL, or RESERVATION
725 * CONFLICT status.
726 *
727 * 11b a The logical unit shall not clear any unit attention condition
728 * reported in the same I_T_L_Q nexus transaction as a CHECK CONDITION
729 * status and shall establish a unit attention condition for the
730 * initiator port associated with the I_T nexus on which the BUSY,
731 * TASK SET FULL, or RESERVATION CONFLICT status is being returned.
732 * Depending on the status, the additional sense code shall be set to
733 * PREVIOUS BUSY STATUS, PREVIOUS TASK SET FULL STATUS, or PREVIOUS
734 * RESERVATION CONFLICT STATUS. Until it is cleared by a REQUEST SENSE
735 * command, a unit attention condition shall be established only once
736 * for a BUSY, TASK SET FULL, or RESERVATION CONFLICT status regardless
737 * to the number of commands completed with one of those status codes.
738 */
739 p[4] = (dev->se_sub_dev->se_dev_attrib.emulate_ua_intlck_ctrl == 2) ? 0x30 :
740 (dev->se_sub_dev->se_dev_attrib.emulate_ua_intlck_ctrl == 1) ? 0x20 : 0x00;
741 /*
742 * From spc4r17, section 7.4.6 Control mode Page
743 *
744 * Task Aborted Status (TAS) bit set to zero.
745 *
746 * A task aborted status (TAS) bit set to zero specifies that aborted
747 * tasks shall be terminated by the device server without any response
748 * to the application client. A TAS bit set to one specifies that tasks
749 * aborted by the actions of an I_T nexus other than the I_T nexus on
750 * which the command was received shall be completed with TASK ABORTED
751 * status (see SAM-4).
752 */
753 p[5] = (dev->se_sub_dev->se_dev_attrib.emulate_tas) ? 0x40 : 0x00;
754 p[8] = 0xff;
755 p[9] = 0xff;
756 p[11] = 30;
757
758 return 12;
759}
760
761static int spc_modesense_caching(struct se_device *dev, unsigned char *p)
762{
763 p[0] = 0x08;
764 p[1] = 0x12;
765 if (dev->se_sub_dev->se_dev_attrib.emulate_write_cache > 0)
766 p[2] = 0x04; /* Write Cache Enable */
767 p[12] = 0x20; /* Disabled Read Ahead */
768
769 return 20;
770}
771
772static void spc_modesense_write_protect(unsigned char *buf, int type)
773{
774 /*
775 * I believe that the WP bit (bit 7) in the mode header is the same for
776 * all device types..
777 */
778 switch (type) {
779 case TYPE_DISK:
780 case TYPE_TAPE:
781 default:
782 buf[0] |= 0x80; /* WP bit */
783 break;
784 }
785}
786
787static void spc_modesense_dpofua(unsigned char *buf, int type)
788{
789 switch (type) {
790 case TYPE_DISK:
791 buf[0] |= 0x10; /* DPOFUA bit */
792 break;
793 default:
794 break;
795 }
796}
797
798static int spc_emulate_modesense(struct se_cmd *cmd)
799{
800 struct se_device *dev = cmd->se_dev;
801 char *cdb = cmd->t_task_cdb;
802 unsigned char *rbuf;
803 int type = dev->transport->get_device_type(dev);
804 int ten = (cmd->t_task_cdb[0] == MODE_SENSE_10);
805 int offset = ten ? 8 : 4;
806 int length = 0;
807 unsigned char buf[SE_MODE_PAGE_BUF];
808
809 memset(buf, 0, SE_MODE_PAGE_BUF);
810
811 switch (cdb[2] & 0x3f) {
812 case 0x01:
813 length = spc_modesense_rwrecovery(&buf[offset]);
814 break;
815 case 0x08:
816 length = spc_modesense_caching(dev, &buf[offset]);
817 break;
818 case 0x0a:
819 length = spc_modesense_control(dev, &buf[offset]);
820 break;
821 case 0x3f:
822 length = spc_modesense_rwrecovery(&buf[offset]);
823 length += spc_modesense_caching(dev, &buf[offset+length]);
824 length += spc_modesense_control(dev, &buf[offset+length]);
825 break;
826 default:
827 pr_err("MODE SENSE: unimplemented page/subpage: 0x%02x/0x%02x\n",
828 cdb[2] & 0x3f, cdb[3]);
829 cmd->scsi_sense_reason = TCM_UNKNOWN_MODE_PAGE;
830 return -EINVAL;
831 }
832 offset += length;
833
834 if (ten) {
835 offset -= 2;
836 buf[0] = (offset >> 8) & 0xff;
837 buf[1] = offset & 0xff;
838
839 if ((cmd->se_lun->lun_access & TRANSPORT_LUNFLAGS_READ_ONLY) ||
840 (cmd->se_deve &&
841 (cmd->se_deve->lun_flags & TRANSPORT_LUNFLAGS_READ_ONLY)))
842 spc_modesense_write_protect(&buf[3], type);
843
844 if ((dev->se_sub_dev->se_dev_attrib.emulate_write_cache > 0) &&
845 (dev->se_sub_dev->se_dev_attrib.emulate_fua_write > 0))
846 spc_modesense_dpofua(&buf[3], type);
847
848 if ((offset + 2) > cmd->data_length)
849 offset = cmd->data_length;
850
851 } else {
852 offset -= 1;
853 buf[0] = offset & 0xff;
854
855 if ((cmd->se_lun->lun_access & TRANSPORT_LUNFLAGS_READ_ONLY) ||
856 (cmd->se_deve &&
857 (cmd->se_deve->lun_flags & TRANSPORT_LUNFLAGS_READ_ONLY)))
858 spc_modesense_write_protect(&buf[2], type);
859
860 if ((dev->se_sub_dev->se_dev_attrib.emulate_write_cache > 0) &&
861 (dev->se_sub_dev->se_dev_attrib.emulate_fua_write > 0))
862 spc_modesense_dpofua(&buf[2], type);
863
864 if ((offset + 1) > cmd->data_length)
865 offset = cmd->data_length;
866 }
867
868 rbuf = transport_kmap_data_sg(cmd);
869 memcpy(rbuf, buf, offset);
870 transport_kunmap_data_sg(cmd);
871
872 target_complete_cmd(cmd, GOOD);
873 return 0;
874}
875
876static int spc_emulate_request_sense(struct se_cmd *cmd)
877{
878 unsigned char *cdb = cmd->t_task_cdb;
879 unsigned char *buf;
880 u8 ua_asc = 0, ua_ascq = 0;
881 int err = 0;
882
883 if (cdb[1] & 0x01) {
884 pr_err("REQUEST_SENSE description emulation not"
885 " supported\n");
886 cmd->scsi_sense_reason = TCM_INVALID_CDB_FIELD;
887 return -ENOSYS;
888 }
889
890 buf = transport_kmap_data_sg(cmd);
891
892 if (!core_scsi3_ua_clear_for_request_sense(cmd, &ua_asc, &ua_ascq)) {
893 /*
894 * CURRENT ERROR, UNIT ATTENTION
895 */
896 buf[0] = 0x70;
897 buf[SPC_SENSE_KEY_OFFSET] = UNIT_ATTENTION;
898
899 if (cmd->data_length < 18) {
900 buf[7] = 0x00;
901 err = -EINVAL;
902 goto end;
903 }
904 /*
905 * The Additional Sense Code (ASC) from the UNIT ATTENTION
906 */
907 buf[SPC_ASC_KEY_OFFSET] = ua_asc;
908 buf[SPC_ASCQ_KEY_OFFSET] = ua_ascq;
909 buf[7] = 0x0A;
910 } else {
911 /*
912 * CURRENT ERROR, NO SENSE
913 */
914 buf[0] = 0x70;
915 buf[SPC_SENSE_KEY_OFFSET] = NO_SENSE;
916
917 if (cmd->data_length < 18) {
918 buf[7] = 0x00;
919 err = -EINVAL;
920 goto end;
921 }
922 /*
923 * NO ADDITIONAL SENSE INFORMATION
924 */
925 buf[SPC_ASC_KEY_OFFSET] = 0x00;
926 buf[7] = 0x0A;
927 }
928
929end:
930 transport_kunmap_data_sg(cmd);
931 target_complete_cmd(cmd, GOOD);
932 return 0;
933}
934
935static int spc_emulate_testunitready(struct se_cmd *cmd)
936{
937 target_complete_cmd(cmd, GOOD);
938 return 0;
939}
940
941int spc_parse_cdb(struct se_cmd *cmd, unsigned int *size)
43{ 942{
44 struct se_subsystem_dev *su_dev = cmd->se_dev->se_sub_dev; 943 struct se_subsystem_dev *su_dev = cmd->se_dev->se_sub_dev;
45 unsigned char *cdb = cmd->t_task_cdb; 944 unsigned char *cdb = cmd->t_task_cdb;
@@ -53,13 +952,11 @@ int spc_parse_cdb(struct se_cmd *cmd, unsigned int *size, bool passthrough)
53 break; 952 break;
54 case MODE_SENSE: 953 case MODE_SENSE:
55 *size = cdb[4]; 954 *size = cdb[4];
56 if (!passthrough) 955 cmd->execute_cmd = spc_emulate_modesense;
57 cmd->execute_cmd = target_emulate_modesense;
58 break; 956 break;
59 case MODE_SENSE_10: 957 case MODE_SENSE_10:
60 *size = (cdb[7] << 8) + cdb[8]; 958 *size = (cdb[7] << 8) + cdb[8];
61 if (!passthrough) 959 cmd->execute_cmd = spc_emulate_modesense;
62 cmd->execute_cmd = target_emulate_modesense;
63 break; 960 break;
64 case LOG_SELECT: 961 case LOG_SELECT:
65 case LOG_SENSE: 962 case LOG_SENSE:
@@ -108,8 +1005,7 @@ int spc_parse_cdb(struct se_cmd *cmd, unsigned int *size, bool passthrough)
108 break; 1005 break;
109 case REQUEST_SENSE: 1006 case REQUEST_SENSE:
110 *size = cdb[4]; 1007 *size = cdb[4];
111 if (!passthrough) 1008 cmd->execute_cmd = spc_emulate_request_sense;
112 cmd->execute_cmd = target_emulate_request_sense;
113 break; 1009 break;
114 case INQUIRY: 1010 case INQUIRY:
115 *size = (cdb[3] << 8) + cdb[4]; 1011 *size = (cdb[3] << 8) + cdb[4];
@@ -120,8 +1016,7 @@ int spc_parse_cdb(struct se_cmd *cmd, unsigned int *size, bool passthrough)
120 */ 1016 */
121 if (cmd->se_dev->dev_task_attr_type == SAM_TASK_ATTR_EMULATED) 1017 if (cmd->se_dev->dev_task_attr_type == SAM_TASK_ATTR_EMULATED)
122 cmd->sam_task_attr = MSG_HEAD_TAG; 1018 cmd->sam_task_attr = MSG_HEAD_TAG;
123 if (!passthrough) 1019 cmd->execute_cmd = spc_emulate_inquiry;
124 cmd->execute_cmd = target_emulate_inquiry;
125 break; 1020 break;
126 case SECURITY_PROTOCOL_IN: 1021 case SECURITY_PROTOCOL_IN:
127 case SECURITY_PROTOCOL_OUT: 1022 case SECURITY_PROTOCOL_OUT:
@@ -152,9 +1047,8 @@ int spc_parse_cdb(struct se_cmd *cmd, unsigned int *size, bool passthrough)
152 cmd->sam_task_attr = MSG_HEAD_TAG; 1047 cmd->sam_task_attr = MSG_HEAD_TAG;
153 break; 1048 break;
154 case TEST_UNIT_READY: 1049 case TEST_UNIT_READY:
1050 cmd->execute_cmd = spc_emulate_testunitready;
155 *size = 0; 1051 *size = 0;
156 if (!passthrough)
157 cmd->execute_cmd = target_emulate_noop;
158 break; 1052 break;
159 default: 1053 default:
160 pr_warn("TARGET_CORE[%s]: Unsupported SCSI Opcode" 1054 pr_warn("TARGET_CORE[%s]: Unsupported SCSI Opcode"
diff --git a/drivers/target/target_core_transport.c b/drivers/target/target_core_transport.c
index 0adabd37cbb1..3a7fe21e4d23 100644
--- a/drivers/target/target_core_transport.c
+++ b/drivers/target/target_core_transport.c
@@ -1343,7 +1343,7 @@ static inline void transport_generic_prepare_cdb(
1343 } 1343 }
1344} 1344}
1345 1345
1346static int target_cmd_size_check(struct se_cmd *cmd, unsigned int size) 1346int target_cmd_size_check(struct se_cmd *cmd, unsigned int size)
1347{ 1347{
1348 struct se_device *dev = cmd->se_dev; 1348 struct se_device *dev = cmd->se_dev;
1349 1349
@@ -1469,7 +1469,6 @@ int target_setup_cmd_from_cdb(
1469 u32 pr_reg_type = 0; 1469 u32 pr_reg_type = 0;
1470 u8 alua_ascq = 0; 1470 u8 alua_ascq = 0;
1471 unsigned long flags; 1471 unsigned long flags;
1472 unsigned int size;
1473 int ret; 1472 int ret;
1474 1473
1475 transport_generic_prepare_cdb(cdb); 1474 transport_generic_prepare_cdb(cdb);
@@ -1561,11 +1560,7 @@ int target_setup_cmd_from_cdb(
1561 */ 1560 */
1562 } 1561 }
1563 1562
1564 ret = cmd->se_dev->transport->parse_cdb(cmd, &size); 1563 ret = cmd->se_dev->transport->parse_cdb(cmd);
1565 if (ret < 0)
1566 return ret;
1567
1568 ret = target_cmd_size_check(cmd, size);
1569 if (ret < 0) 1564 if (ret < 0)
1570 return ret; 1565 return ret;
1571 1566
@@ -2163,32 +2158,6 @@ out:
2163 return -1; 2158 return -1;
2164} 2159}
2165 2160
2166static inline long long transport_dev_end_lba(struct se_device *dev)
2167{
2168 return dev->transport->get_blocks(dev) + 1;
2169}
2170
2171static int transport_cmd_get_valid_sectors(struct se_cmd *cmd)
2172{
2173 struct se_device *dev = cmd->se_dev;
2174 u32 sectors;
2175
2176 if (dev->transport->get_device_type(dev) != TYPE_DISK)
2177 return 0;
2178
2179 sectors = (cmd->data_length / dev->se_sub_dev->se_dev_attrib.block_size);
2180
2181 if ((cmd->t_task_lba + sectors) > transport_dev_end_lba(dev)) {
2182 pr_err("LBA: %llu Sectors: %u exceeds"
2183 " transport_dev_end_lba(): %llu\n",
2184 cmd->t_task_lba, sectors,
2185 transport_dev_end_lba(dev));
2186 return -EINVAL;
2187 }
2188
2189 return 0;
2190}
2191
2192/* 2161/*
2193 * Called from I/O completion to determine which dormant/delayed 2162 * Called from I/O completion to determine which dormant/delayed
2194 * and ordered cmds need to have their tasks added to the execution queue. 2163 * and ordered cmds need to have their tasks added to the execution queue.
@@ -2632,7 +2601,6 @@ out:
2632 */ 2601 */
2633int transport_generic_new_cmd(struct se_cmd *cmd) 2602int transport_generic_new_cmd(struct se_cmd *cmd)
2634{ 2603{
2635 struct se_device *dev = cmd->se_dev;
2636 int ret = 0; 2604 int ret = 0;
2637 2605
2638 /* 2606 /*
@@ -2666,17 +2634,6 @@ int transport_generic_new_cmd(struct se_cmd *cmd)
2666 return 0; 2634 return 0;
2667 } 2635 }
2668 2636
2669 if (cmd->se_cmd_flags & SCF_SCSI_DATA_CDB) {
2670 struct se_dev_attrib *attr = &dev->se_sub_dev->se_dev_attrib;
2671
2672 if (transport_cmd_get_valid_sectors(cmd) < 0)
2673 return -EINVAL;
2674
2675 BUG_ON(cmd->data_length % attr->block_size);
2676 BUG_ON(DIV_ROUND_UP(cmd->data_length, attr->block_size) >
2677 attr->hw_max_sectors);
2678 }
2679
2680 atomic_inc(&cmd->t_fe_count); 2637 atomic_inc(&cmd->t_fe_count);
2681 2638
2682 /* 2639 /*
generated by cgit v1.2.2 (git 2.25.0) at 2024-12-26 16:05:05 -0500