Root/
1 | /* |
2 | * SCSI Primary Commands (SPC) parsing and emulation. |
3 | * |
4 | * (c) Copyright 2002-2012 RisingTide Systems LLC. |
5 | * |
6 | * Nicholas A. Bellinger <nab@kernel.org> |
7 | * |
8 | * This program is free software; you can redistribute it and/or modify |
9 | * it under the terms of the GNU General Public License as published by |
10 | * the Free Software Foundation; either version 2 of the License, or |
11 | * (at your option) any later version. |
12 | * |
13 | * This program is distributed in the hope that it will be useful, |
14 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
15 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
16 | * GNU General Public License for more details. |
17 | * |
18 | * You should have received a copy of the GNU General Public License |
19 | * along with this program; if not, write to the Free Software |
20 | * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. |
21 | */ |
22 | |
23 | #include <linux/kernel.h> |
24 | #include <linux/module.h> |
25 | #include <asm/unaligned.h> |
26 | |
27 | #include <scsi/scsi.h> |
28 | #include <scsi/scsi_tcq.h> |
29 | |
30 | #include <target/target_core_base.h> |
31 | #include <target/target_core_backend.h> |
32 | #include <target/target_core_fabric.h> |
33 | |
34 | #include "target_core_internal.h" |
35 | #include "target_core_alua.h" |
36 | #include "target_core_pr.h" |
37 | #include "target_core_ua.h" |
38 | |
39 | |
40 | static void spc_fill_alua_data(struct se_port *port, unsigned char *buf) |
41 | { |
42 | struct t10_alua_tg_pt_gp *tg_pt_gp; |
43 | struct t10_alua_tg_pt_gp_member *tg_pt_gp_mem; |
44 | |
45 | /* |
46 | * Set SCCS for MAINTENANCE_IN + REPORT_TARGET_PORT_GROUPS. |
47 | */ |
48 | buf[5] = 0x80; |
49 | |
50 | /* |
51 | * Set TPGS field for explict and/or implict ALUA access type |
52 | * and opteration. |
53 | * |
54 | * See spc4r17 section 6.4.2 Table 135 |
55 | */ |
56 | if (!port) |
57 | return; |
58 | tg_pt_gp_mem = port->sep_alua_tg_pt_gp_mem; |
59 | if (!tg_pt_gp_mem) |
60 | return; |
61 | |
62 | spin_lock(&tg_pt_gp_mem->tg_pt_gp_mem_lock); |
63 | tg_pt_gp = tg_pt_gp_mem->tg_pt_gp; |
64 | if (tg_pt_gp) |
65 | buf[5] |= tg_pt_gp->tg_pt_gp_alua_access_type; |
66 | spin_unlock(&tg_pt_gp_mem->tg_pt_gp_mem_lock); |
67 | } |
68 | |
69 | sense_reason_t |
70 | spc_emulate_inquiry_std(struct se_cmd *cmd, unsigned char *buf) |
71 | { |
72 | struct se_lun *lun = cmd->se_lun; |
73 | struct se_device *dev = cmd->se_dev; |
74 | |
75 | /* Set RMB (removable media) for tape devices */ |
76 | if (dev->transport->get_device_type(dev) == TYPE_TAPE) |
77 | buf[1] = 0x80; |
78 | |
79 | buf[2] = 0x05; /* SPC-3 */ |
80 | |
81 | /* |
82 | * NORMACA and HISUP = 0, RESPONSE DATA FORMAT = 2 |
83 | * |
84 | * SPC4 says: |
85 | * A RESPONSE DATA FORMAT field set to 2h indicates that the |
86 | * standard INQUIRY data is in the format defined in this |
87 | * standard. Response data format values less than 2h are |
88 | * obsolete. Response data format values greater than 2h are |
89 | * reserved. |
90 | */ |
91 | buf[3] = 2; |
92 | |
93 | /* |
94 | * Enable SCCS and TPGS fields for Emulated ALUA |
95 | */ |
96 | spc_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->t10_wwn.model); |
102 | snprintf(&buf[32], 4, "%s", dev->t10_wwn.revision); |
103 | buf[4] = 31; /* Set additional length to 31 */ |
104 | |
105 | return 0; |
106 | } |
107 | EXPORT_SYMBOL(spc_emulate_inquiry_std); |
108 | |
109 | /* unit serial number */ |
110 | static sense_reason_t |
111 | 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->dev_flags & DF_EMULATED_VPD_UNIT_SERIAL) { |
117 | u32 unit_serial_len; |
118 | |
119 | unit_serial_len = strlen(dev->t10_wwn.unit_serial); |
120 | unit_serial_len++; /* For NULL Terminator */ |
121 | |
122 | len += sprintf(&buf[4], "%s", dev->t10_wwn.unit_serial); |
123 | len++; /* Extra Byte for NULL Terminator */ |
124 | buf[3] = len; |
125 | } |
126 | return 0; |
127 | } |
128 | |
129 | static void spc_parse_naa_6h_vendor_specific(struct se_device *dev, |
130 | unsigned char *buf) |
131 | { |
132 | unsigned char *p = &dev->t10_wwn.unit_serial[0]; |
133 | int cnt; |
134 | bool next = true; |
135 | |
136 | /* |
137 | * Generate up to 36 bits of VENDOR SPECIFIC IDENTIFIER starting on |
138 | * byte 3 bit 3-0 for NAA IEEE Registered Extended DESIGNATOR field |
139 | * format, followed by 64 bits of VENDOR SPECIFIC IDENTIFIER EXTENSION |
140 | * to complete the payload. These are based from VPD=0x80 PRODUCT SERIAL |
141 | * NUMBER set via vpd_unit_serial in target_core_configfs.c to ensure |
142 | * per device uniqeness. |
143 | */ |
144 | for (cnt = 0; *p && cnt < 13; p++) { |
145 | int val = hex_to_bin(*p); |
146 | |
147 | if (val < 0) |
148 | continue; |
149 | |
150 | if (next) { |
151 | next = false; |
152 | buf[cnt++] |= val; |
153 | } else { |
154 | next = true; |
155 | buf[cnt] = val << 4; |
156 | } |
157 | } |
158 | } |
159 | |
160 | /* |
161 | * Device identification VPD, for a complete list of |
162 | * DESIGNATOR TYPEs see spc4r17 Table 459. |
163 | */ |
164 | sense_reason_t |
165 | spc_emulate_evpd_83(struct se_cmd *cmd, unsigned char *buf) |
166 | { |
167 | struct se_device *dev = cmd->se_dev; |
168 | struct se_lun *lun = cmd->se_lun; |
169 | struct se_port *port = NULL; |
170 | struct se_portal_group *tpg = NULL; |
171 | struct t10_alua_lu_gp_member *lu_gp_mem; |
172 | struct t10_alua_tg_pt_gp *tg_pt_gp; |
173 | struct t10_alua_tg_pt_gp_member *tg_pt_gp_mem; |
174 | unsigned char *prod = &dev->t10_wwn.model[0]; |
175 | u32 prod_len; |
176 | u32 unit_serial_len, off = 0; |
177 | u16 len = 0, id_len; |
178 | |
179 | off = 4; |
180 | |
181 | /* |
182 | * NAA IEEE Registered Extended Assigned designator format, see |
183 | * spc4r17 section 7.7.3.6.5 |
184 | * |
185 | * We depend upon a target_core_mod/ConfigFS provided |
186 | * /sys/kernel/config/target/core/$HBA/$DEV/wwn/vpd_unit_serial |
187 | * value in order to return the NAA id. |
188 | */ |
189 | if (!(dev->dev_flags & DF_EMULATED_VPD_UNIT_SERIAL)) |
190 | goto check_t10_vend_desc; |
191 | |
192 | /* CODE SET == Binary */ |
193 | buf[off++] = 0x1; |
194 | |
195 | /* Set ASSOCIATION == addressed logical unit: 0)b */ |
196 | buf[off] = 0x00; |
197 | |
198 | /* Identifier/Designator type == NAA identifier */ |
199 | buf[off++] |= 0x3; |
200 | off++; |
201 | |
202 | /* Identifier/Designator length */ |
203 | buf[off++] = 0x10; |
204 | |
205 | /* |
206 | * Start NAA IEEE Registered Extended Identifier/Designator |
207 | */ |
208 | buf[off++] = (0x6 << 4); |
209 | |
210 | /* |
211 | * Use OpenFabrics IEEE Company ID: 00 14 05 |
212 | */ |
213 | buf[off++] = 0x01; |
214 | buf[off++] = 0x40; |
215 | buf[off] = (0x5 << 4); |
216 | |
217 | /* |
218 | * Return ConfigFS Unit Serial Number information for |
219 | * VENDOR_SPECIFIC_IDENTIFIER and |
220 | * VENDOR_SPECIFIC_IDENTIFIER_EXTENTION |
221 | */ |
222 | spc_parse_naa_6h_vendor_specific(dev, &buf[off]); |
223 | |
224 | len = 20; |
225 | off = (len + 4); |
226 | |
227 | check_t10_vend_desc: |
228 | /* |
229 | * T10 Vendor Identifier Page, see spc4r17 section 7.7.3.4 |
230 | */ |
231 | id_len = 8; /* For Vendor field */ |
232 | prod_len = 4; /* For VPD Header */ |
233 | prod_len += 8; /* For Vendor field */ |
234 | prod_len += strlen(prod); |
235 | prod_len++; /* For : */ |
236 | |
237 | if (dev->dev_flags & DF_EMULATED_VPD_UNIT_SERIAL) { |
238 | unit_serial_len = strlen(&dev->t10_wwn.unit_serial[0]); |
239 | unit_serial_len++; /* For NULL Terminator */ |
240 | |
241 | id_len += sprintf(&buf[off+12], "%s:%s", prod, |
242 | &dev->t10_wwn.unit_serial[0]); |
243 | } |
244 | buf[off] = 0x2; /* ASCII */ |
245 | buf[off+1] = 0x1; /* T10 Vendor ID */ |
246 | buf[off+2] = 0x0; |
247 | memcpy(&buf[off+4], "LIO-ORG", 8); |
248 | /* Extra Byte for NULL Terminator */ |
249 | id_len++; |
250 | /* Identifier Length */ |
251 | buf[off+3] = id_len; |
252 | /* Header size for Designation descriptor */ |
253 | len += (id_len + 4); |
254 | off += (id_len + 4); |
255 | /* |
256 | * struct se_port is only set for INQUIRY VPD=1 through $FABRIC_MOD |
257 | */ |
258 | port = lun->lun_sep; |
259 | if (port) { |
260 | struct t10_alua_lu_gp *lu_gp; |
261 | u32 padding, scsi_name_len; |
262 | u16 lu_gp_id = 0; |
263 | u16 tg_pt_gp_id = 0; |
264 | u16 tpgt; |
265 | |
266 | tpg = port->sep_tpg; |
267 | /* |
268 | * Relative target port identifer, see spc4r17 |
269 | * section 7.7.3.7 |
270 | * |
271 | * Get the PROTOCOL IDENTIFIER as defined by spc4r17 |
272 | * section 7.5.1 Table 362 |
273 | */ |
274 | buf[off] = |
275 | (tpg->se_tpg_tfo->get_fabric_proto_ident(tpg) << 4); |
276 | buf[off++] |= 0x1; /* CODE SET == Binary */ |
277 | buf[off] = 0x80; /* Set PIV=1 */ |
278 | /* Set ASSOCIATION == target port: 01b */ |
279 | buf[off] |= 0x10; |
280 | /* DESIGNATOR TYPE == Relative target port identifer */ |
281 | buf[off++] |= 0x4; |
282 | off++; /* Skip over Reserved */ |
283 | buf[off++] = 4; /* DESIGNATOR LENGTH */ |
284 | /* Skip over Obsolete field in RTPI payload |
285 | * in Table 472 */ |
286 | off += 2; |
287 | buf[off++] = ((port->sep_rtpi >> 8) & 0xff); |
288 | buf[off++] = (port->sep_rtpi & 0xff); |
289 | len += 8; /* Header size + Designation descriptor */ |
290 | /* |
291 | * Target port group identifier, see spc4r17 |
292 | * section 7.7.3.8 |
293 | * |
294 | * Get the PROTOCOL IDENTIFIER as defined by spc4r17 |
295 | * section 7.5.1 Table 362 |
296 | */ |
297 | tg_pt_gp_mem = port->sep_alua_tg_pt_gp_mem; |
298 | if (!tg_pt_gp_mem) |
299 | goto check_lu_gp; |
300 | |
301 | spin_lock(&tg_pt_gp_mem->tg_pt_gp_mem_lock); |
302 | tg_pt_gp = tg_pt_gp_mem->tg_pt_gp; |
303 | if (!tg_pt_gp) { |
304 | spin_unlock(&tg_pt_gp_mem->tg_pt_gp_mem_lock); |
305 | goto check_lu_gp; |
306 | } |
307 | tg_pt_gp_id = tg_pt_gp->tg_pt_gp_id; |
308 | spin_unlock(&tg_pt_gp_mem->tg_pt_gp_mem_lock); |
309 | |
310 | buf[off] = |
311 | (tpg->se_tpg_tfo->get_fabric_proto_ident(tpg) << 4); |
312 | buf[off++] |= 0x1; /* CODE SET == Binary */ |
313 | buf[off] = 0x80; /* Set PIV=1 */ |
314 | /* Set ASSOCIATION == target port: 01b */ |
315 | buf[off] |= 0x10; |
316 | /* DESIGNATOR TYPE == Target port group identifier */ |
317 | buf[off++] |= 0x5; |
318 | off++; /* Skip over Reserved */ |
319 | buf[off++] = 4; /* DESIGNATOR LENGTH */ |
320 | off += 2; /* Skip over Reserved Field */ |
321 | buf[off++] = ((tg_pt_gp_id >> 8) & 0xff); |
322 | buf[off++] = (tg_pt_gp_id & 0xff); |
323 | len += 8; /* Header size + Designation descriptor */ |
324 | /* |
325 | * Logical Unit Group identifier, see spc4r17 |
326 | * section 7.7.3.8 |
327 | */ |
328 | check_lu_gp: |
329 | lu_gp_mem = dev->dev_alua_lu_gp_mem; |
330 | if (!lu_gp_mem) |
331 | goto check_scsi_name; |
332 | |
333 | spin_lock(&lu_gp_mem->lu_gp_mem_lock); |
334 | lu_gp = lu_gp_mem->lu_gp; |
335 | if (!lu_gp) { |
336 | spin_unlock(&lu_gp_mem->lu_gp_mem_lock); |
337 | goto check_scsi_name; |
338 | } |
339 | lu_gp_id = lu_gp->lu_gp_id; |
340 | spin_unlock(&lu_gp_mem->lu_gp_mem_lock); |
341 | |
342 | buf[off++] |= 0x1; /* CODE SET == Binary */ |
343 | /* DESIGNATOR TYPE == Logical Unit Group identifier */ |
344 | buf[off++] |= 0x6; |
345 | off++; /* Skip over Reserved */ |
346 | buf[off++] = 4; /* DESIGNATOR LENGTH */ |
347 | off += 2; /* Skip over Reserved Field */ |
348 | buf[off++] = ((lu_gp_id >> 8) & 0xff); |
349 | buf[off++] = (lu_gp_id & 0xff); |
350 | len += 8; /* Header size + Designation descriptor */ |
351 | /* |
352 | * SCSI name string designator, see spc4r17 |
353 | * section 7.7.3.11 |
354 | * |
355 | * Get the PROTOCOL IDENTIFIER as defined by spc4r17 |
356 | * section 7.5.1 Table 362 |
357 | */ |
358 | check_scsi_name: |
359 | scsi_name_len = strlen(tpg->se_tpg_tfo->tpg_get_wwn(tpg)); |
360 | /* UTF-8 ",t,0x<16-bit TPGT>" + NULL Terminator */ |
361 | scsi_name_len += 10; |
362 | /* Check for 4-byte padding */ |
363 | padding = ((-scsi_name_len) & 3); |
364 | if (padding != 0) |
365 | scsi_name_len += padding; |
366 | /* Header size + Designation descriptor */ |
367 | scsi_name_len += 4; |
368 | |
369 | buf[off] = |
370 | (tpg->se_tpg_tfo->get_fabric_proto_ident(tpg) << 4); |
371 | buf[off++] |= 0x3; /* CODE SET == UTF-8 */ |
372 | buf[off] = 0x80; /* Set PIV=1 */ |
373 | /* Set ASSOCIATION == target port: 01b */ |
374 | buf[off] |= 0x10; |
375 | /* DESIGNATOR TYPE == SCSI name string */ |
376 | buf[off++] |= 0x8; |
377 | off += 2; /* Skip over Reserved and length */ |
378 | /* |
379 | * SCSI name string identifer containing, $FABRIC_MOD |
380 | * dependent information. For LIO-Target and iSCSI |
381 | * Target Port, this means "<iSCSI name>,t,0x<TPGT> in |
382 | * UTF-8 encoding. |
383 | */ |
384 | tpgt = tpg->se_tpg_tfo->tpg_get_tag(tpg); |
385 | scsi_name_len = sprintf(&buf[off], "%s,t,0x%04x", |
386 | tpg->se_tpg_tfo->tpg_get_wwn(tpg), tpgt); |
387 | scsi_name_len += 1 /* Include NULL terminator */; |
388 | /* |
389 | * The null-terminated, null-padded (see 4.4.2) SCSI |
390 | * NAME STRING field contains a UTF-8 format string. |
391 | * The number of bytes in the SCSI NAME STRING field |
392 | * (i.e., the value in the DESIGNATOR LENGTH field) |
393 | * shall be no larger than 256 and shall be a multiple |
394 | * of four. |
395 | */ |
396 | if (padding) |
397 | scsi_name_len += padding; |
398 | |
399 | buf[off-1] = scsi_name_len; |
400 | off += scsi_name_len; |
401 | /* Header size + Designation descriptor */ |
402 | len += (scsi_name_len + 4); |
403 | } |
404 | buf[2] = ((len >> 8) & 0xff); |
405 | buf[3] = (len & 0xff); /* Page Length for VPD 0x83 */ |
406 | return 0; |
407 | } |
408 | EXPORT_SYMBOL(spc_emulate_evpd_83); |
409 | |
410 | static bool |
411 | spc_check_dev_wce(struct se_device *dev) |
412 | { |
413 | bool wce = false; |
414 | |
415 | if (dev->transport->get_write_cache) |
416 | wce = dev->transport->get_write_cache(dev); |
417 | else if (dev->dev_attrib.emulate_write_cache > 0) |
418 | wce = true; |
419 | |
420 | return wce; |
421 | } |
422 | |
423 | /* Extended INQUIRY Data VPD Page */ |
424 | static sense_reason_t |
425 | spc_emulate_evpd_86(struct se_cmd *cmd, unsigned char *buf) |
426 | { |
427 | struct se_device *dev = cmd->se_dev; |
428 | |
429 | buf[3] = 0x3c; |
430 | /* Set HEADSUP, ORDSUP, SIMPSUP */ |
431 | buf[5] = 0x07; |
432 | |
433 | /* If WriteCache emulation is enabled, set V_SUP */ |
434 | if (spc_check_dev_wce(dev)) |
435 | buf[6] = 0x01; |
436 | return 0; |
437 | } |
438 | |
439 | /* Block Limits VPD page */ |
440 | static sense_reason_t |
441 | spc_emulate_evpd_b0(struct se_cmd *cmd, unsigned char *buf) |
442 | { |
443 | struct se_device *dev = cmd->se_dev; |
444 | u32 max_sectors; |
445 | int have_tp = 0; |
446 | |
447 | /* |
448 | * Following spc3r22 section 6.5.3 Block Limits VPD page, when |
449 | * emulate_tpu=1 or emulate_tpws=1 we will be expect a |
450 | * different page length for Thin Provisioning. |
451 | */ |
452 | if (dev->dev_attrib.emulate_tpu || dev->dev_attrib.emulate_tpws) |
453 | have_tp = 1; |
454 | |
455 | buf[0] = dev->transport->get_device_type(dev); |
456 | buf[3] = have_tp ? 0x3c : 0x10; |
457 | |
458 | /* Set WSNZ to 1 */ |
459 | buf[4] = 0x01; |
460 | |
461 | /* |
462 | * Set OPTIMAL TRANSFER LENGTH GRANULARITY |
463 | */ |
464 | put_unaligned_be16(1, &buf[6]); |
465 | |
466 | /* |
467 | * Set MAXIMUM TRANSFER LENGTH |
468 | */ |
469 | max_sectors = min(dev->dev_attrib.fabric_max_sectors, |
470 | dev->dev_attrib.hw_max_sectors); |
471 | put_unaligned_be32(max_sectors, &buf[8]); |
472 | |
473 | /* |
474 | * Set OPTIMAL TRANSFER LENGTH |
475 | */ |
476 | put_unaligned_be32(dev->dev_attrib.optimal_sectors, &buf[12]); |
477 | |
478 | /* |
479 | * Exit now if we don't support TP. |
480 | */ |
481 | if (!have_tp) |
482 | goto max_write_same; |
483 | |
484 | /* |
485 | * Set MAXIMUM UNMAP LBA COUNT |
486 | */ |
487 | put_unaligned_be32(dev->dev_attrib.max_unmap_lba_count, &buf[20]); |
488 | |
489 | /* |
490 | * Set MAXIMUM UNMAP BLOCK DESCRIPTOR COUNT |
491 | */ |
492 | put_unaligned_be32(dev->dev_attrib.max_unmap_block_desc_count, |
493 | &buf[24]); |
494 | |
495 | /* |
496 | * Set OPTIMAL UNMAP GRANULARITY |
497 | */ |
498 | put_unaligned_be32(dev->dev_attrib.unmap_granularity, &buf[28]); |
499 | |
500 | /* |
501 | * UNMAP GRANULARITY ALIGNMENT |
502 | */ |
503 | put_unaligned_be32(dev->dev_attrib.unmap_granularity_alignment, |
504 | &buf[32]); |
505 | if (dev->dev_attrib.unmap_granularity_alignment != 0) |
506 | buf[32] |= 0x80; /* Set the UGAVALID bit */ |
507 | |
508 | /* |
509 | * MAXIMUM WRITE SAME LENGTH |
510 | */ |
511 | max_write_same: |
512 | put_unaligned_be64(dev->dev_attrib.max_write_same_len, &buf[36]); |
513 | |
514 | return 0; |
515 | } |
516 | |
517 | /* Block Device Characteristics VPD page */ |
518 | static sense_reason_t |
519 | spc_emulate_evpd_b1(struct se_cmd *cmd, unsigned char *buf) |
520 | { |
521 | struct se_device *dev = cmd->se_dev; |
522 | |
523 | buf[0] = dev->transport->get_device_type(dev); |
524 | buf[3] = 0x3c; |
525 | buf[5] = dev->dev_attrib.is_nonrot ? 1 : 0; |
526 | |
527 | return 0; |
528 | } |
529 | |
530 | /* Thin Provisioning VPD */ |
531 | static sense_reason_t |
532 | spc_emulate_evpd_b2(struct se_cmd *cmd, unsigned char *buf) |
533 | { |
534 | struct se_device *dev = cmd->se_dev; |
535 | |
536 | /* |
537 | * From spc3r22 section 6.5.4 Thin Provisioning VPD page: |
538 | * |
539 | * The PAGE LENGTH field is defined in SPC-4. If the DP bit is set to |
540 | * zero, then the page length shall be set to 0004h. If the DP bit |
541 | * is set to one, then the page length shall be set to the value |
542 | * defined in table 162. |
543 | */ |
544 | buf[0] = dev->transport->get_device_type(dev); |
545 | |
546 | /* |
547 | * Set Hardcoded length mentioned above for DP=0 |
548 | */ |
549 | put_unaligned_be16(0x0004, &buf[2]); |
550 | |
551 | /* |
552 | * The THRESHOLD EXPONENT field indicates the threshold set size in |
553 | * LBAs as a power of 2 (i.e., the threshold set size is equal to |
554 | * 2(threshold exponent)). |
555 | * |
556 | * Note that this is currently set to 0x00 as mkp says it will be |
557 | * changing again. We can enable this once it has settled in T10 |
558 | * and is actually used by Linux/SCSI ML code. |
559 | */ |
560 | buf[4] = 0x00; |
561 | |
562 | /* |
563 | * A TPU bit set to one indicates that the device server supports |
564 | * the UNMAP command (see 5.25). A TPU bit set to zero indicates |
565 | * that the device server does not support the UNMAP command. |
566 | */ |
567 | if (dev->dev_attrib.emulate_tpu != 0) |
568 | buf[5] = 0x80; |
569 | |
570 | /* |
571 | * A TPWS bit set to one indicates that the device server supports |
572 | * the use of the WRITE SAME (16) command (see 5.42) to unmap LBAs. |
573 | * A TPWS bit set to zero indicates that the device server does not |
574 | * support the use of the WRITE SAME (16) command to unmap LBAs. |
575 | */ |
576 | if (dev->dev_attrib.emulate_tpws != 0) |
577 | buf[5] |= 0x40; |
578 | |
579 | return 0; |
580 | } |
581 | |
582 | static sense_reason_t |
583 | spc_emulate_evpd_00(struct se_cmd *cmd, unsigned char *buf); |
584 | |
585 | static struct { |
586 | uint8_t page; |
587 | sense_reason_t (*emulate)(struct se_cmd *, unsigned char *); |
588 | } evpd_handlers[] = { |
589 | { .page = 0x00, .emulate = spc_emulate_evpd_00 }, |
590 | { .page = 0x80, .emulate = spc_emulate_evpd_80 }, |
591 | { .page = 0x83, .emulate = spc_emulate_evpd_83 }, |
592 | { .page = 0x86, .emulate = spc_emulate_evpd_86 }, |
593 | { .page = 0xb0, .emulate = spc_emulate_evpd_b0 }, |
594 | { .page = 0xb1, .emulate = spc_emulate_evpd_b1 }, |
595 | { .page = 0xb2, .emulate = spc_emulate_evpd_b2 }, |
596 | }; |
597 | |
598 | /* supported vital product data pages */ |
599 | static sense_reason_t |
600 | spc_emulate_evpd_00(struct se_cmd *cmd, unsigned char *buf) |
601 | { |
602 | int p; |
603 | |
604 | /* |
605 | * Only report the INQUIRY EVPD=1 pages after a valid NAA |
606 | * Registered Extended LUN WWN has been set via ConfigFS |
607 | * during device creation/restart. |
608 | */ |
609 | if (cmd->se_dev->dev_flags & DF_EMULATED_VPD_UNIT_SERIAL) { |
610 | buf[3] = ARRAY_SIZE(evpd_handlers); |
611 | for (p = 0; p < ARRAY_SIZE(evpd_handlers); ++p) |
612 | buf[p + 4] = evpd_handlers[p].page; |
613 | } |
614 | |
615 | return 0; |
616 | } |
617 | |
618 | static sense_reason_t |
619 | spc_emulate_inquiry(struct se_cmd *cmd) |
620 | { |
621 | struct se_device *dev = cmd->se_dev; |
622 | struct se_portal_group *tpg = cmd->se_lun->lun_sep->sep_tpg; |
623 | unsigned char *rbuf; |
624 | unsigned char *cdb = cmd->t_task_cdb; |
625 | unsigned char buf[SE_INQUIRY_BUF]; |
626 | sense_reason_t ret; |
627 | int p; |
628 | |
629 | memset(buf, 0, SE_INQUIRY_BUF); |
630 | |
631 | if (dev == tpg->tpg_virt_lun0.lun_se_dev) |
632 | buf[0] = 0x3f; /* Not connected */ |
633 | else |
634 | buf[0] = dev->transport->get_device_type(dev); |
635 | |
636 | if (!(cdb[1] & 0x1)) { |
637 | if (cdb[2]) { |
638 | pr_err("INQUIRY with EVPD==0 but PAGE CODE=%02x\n", |
639 | cdb[2]); |
640 | ret = TCM_INVALID_CDB_FIELD; |
641 | goto out; |
642 | } |
643 | |
644 | ret = spc_emulate_inquiry_std(cmd, buf); |
645 | goto out; |
646 | } |
647 | |
648 | for (p = 0; p < ARRAY_SIZE(evpd_handlers); ++p) { |
649 | if (cdb[2] == evpd_handlers[p].page) { |
650 | buf[1] = cdb[2]; |
651 | ret = evpd_handlers[p].emulate(cmd, buf); |
652 | goto out; |
653 | } |
654 | } |
655 | |
656 | pr_err("Unknown VPD Code: 0x%02x\n", cdb[2]); |
657 | ret = TCM_INVALID_CDB_FIELD; |
658 | |
659 | out: |
660 | rbuf = transport_kmap_data_sg(cmd); |
661 | if (rbuf) { |
662 | memcpy(rbuf, buf, min_t(u32, sizeof(buf), cmd->data_length)); |
663 | transport_kunmap_data_sg(cmd); |
664 | } |
665 | |
666 | if (!ret) |
667 | target_complete_cmd(cmd, GOOD); |
668 | return ret; |
669 | } |
670 | |
671 | static int spc_modesense_rwrecovery(struct se_device *dev, u8 pc, u8 *p) |
672 | { |
673 | p[0] = 0x01; |
674 | p[1] = 0x0a; |
675 | |
676 | /* No changeable values for now */ |
677 | if (pc == 1) |
678 | goto out; |
679 | |
680 | out: |
681 | return 12; |
682 | } |
683 | |
684 | static int spc_modesense_control(struct se_device *dev, u8 pc, u8 *p) |
685 | { |
686 | p[0] = 0x0a; |
687 | p[1] = 0x0a; |
688 | |
689 | /* No changeable values for now */ |
690 | if (pc == 1) |
691 | goto out; |
692 | |
693 | p[2] = 2; |
694 | /* |
695 | * From spc4r23, 7.4.7 Control mode page |
696 | * |
697 | * The QUEUE ALGORITHM MODIFIER field (see table 368) specifies |
698 | * restrictions on the algorithm used for reordering commands |
699 | * having the SIMPLE task attribute (see SAM-4). |
700 | * |
701 | * Table 368 -- QUEUE ALGORITHM MODIFIER field |
702 | * Code Description |
703 | * 0h Restricted reordering |
704 | * 1h Unrestricted reordering allowed |
705 | * 2h to 7h Reserved |
706 | * 8h to Fh Vendor specific |
707 | * |
708 | * A value of zero in the QUEUE ALGORITHM MODIFIER field specifies that |
709 | * the device server shall order the processing sequence of commands |
710 | * having the SIMPLE task attribute such that data integrity is maintained |
711 | * for that I_T nexus (i.e., if the transmission of new SCSI transport protocol |
712 | * requests is halted at any time, the final value of all data observable |
713 | * on the medium shall be the same as if all the commands had been processed |
714 | * with the ORDERED task attribute). |
715 | * |
716 | * A value of one in the QUEUE ALGORITHM MODIFIER field specifies that the |
717 | * device server may reorder the processing sequence of commands having the |
718 | * SIMPLE task attribute in any manner. Any data integrity exposures related to |
719 | * command sequence order shall be explicitly handled by the application client |
720 | * through the selection of appropriate ommands and task attributes. |
721 | */ |
722 | p[3] = (dev->dev_attrib.emulate_rest_reord == 1) ? 0x00 : 0x10; |
723 | /* |
724 | * From spc4r17, section 7.4.6 Control mode Page |
725 | * |
726 | * Unit Attention interlocks control (UN_INTLCK_CTRL) to code 00b |
727 | * |
728 | * 00b: The logical unit shall clear any unit attention condition |
729 | * reported in the same I_T_L_Q nexus transaction as a CHECK CONDITION |
730 | * status and shall not establish a unit attention condition when a com- |
731 | * mand is completed with BUSY, TASK SET FULL, or RESERVATION CONFLICT |
732 | * status. |
733 | * |
734 | * 10b: The logical unit shall not clear any unit attention condition |
735 | * reported in the same I_T_L_Q nexus transaction as a CHECK CONDITION |
736 | * status and shall not establish a unit attention condition when |
737 | * a command is completed with BUSY, TASK SET FULL, or RESERVATION |
738 | * CONFLICT status. |
739 | * |
740 | * 11b a The logical unit shall not clear any unit attention condition |
741 | * reported in the same I_T_L_Q nexus transaction as a CHECK CONDITION |
742 | * status and shall establish a unit attention condition for the |
743 | * initiator port associated with the I_T nexus on which the BUSY, |
744 | * TASK SET FULL, or RESERVATION CONFLICT status is being returned. |
745 | * Depending on the status, the additional sense code shall be set to |
746 | * PREVIOUS BUSY STATUS, PREVIOUS TASK SET FULL STATUS, or PREVIOUS |
747 | * RESERVATION CONFLICT STATUS. Until it is cleared by a REQUEST SENSE |
748 | * command, a unit attention condition shall be established only once |
749 | * for a BUSY, TASK SET FULL, or RESERVATION CONFLICT status regardless |
750 | * to the number of commands completed with one of those status codes. |
751 | */ |
752 | p[4] = (dev->dev_attrib.emulate_ua_intlck_ctrl == 2) ? 0x30 : |
753 | (dev->dev_attrib.emulate_ua_intlck_ctrl == 1) ? 0x20 : 0x00; |
754 | /* |
755 | * From spc4r17, section 7.4.6 Control mode Page |
756 | * |
757 | * Task Aborted Status (TAS) bit set to zero. |
758 | * |
759 | * A task aborted status (TAS) bit set to zero specifies that aborted |
760 | * tasks shall be terminated by the device server without any response |
761 | * to the application client. A TAS bit set to one specifies that tasks |
762 | * aborted by the actions of an I_T nexus other than the I_T nexus on |
763 | * which the command was received shall be completed with TASK ABORTED |
764 | * status (see SAM-4). |
765 | */ |
766 | p[5] = (dev->dev_attrib.emulate_tas) ? 0x40 : 0x00; |
767 | p[8] = 0xff; |
768 | p[9] = 0xff; |
769 | p[11] = 30; |
770 | |
771 | out: |
772 | return 12; |
773 | } |
774 | |
775 | static int spc_modesense_caching(struct se_device *dev, u8 pc, u8 *p) |
776 | { |
777 | p[0] = 0x08; |
778 | p[1] = 0x12; |
779 | |
780 | /* No changeable values for now */ |
781 | if (pc == 1) |
782 | goto out; |
783 | |
784 | if (spc_check_dev_wce(dev)) |
785 | p[2] = 0x04; /* Write Cache Enable */ |
786 | p[12] = 0x20; /* Disabled Read Ahead */ |
787 | |
788 | out: |
789 | return 20; |
790 | } |
791 | |
792 | static int spc_modesense_informational_exceptions(struct se_device *dev, u8 pc, unsigned char *p) |
793 | { |
794 | p[0] = 0x1c; |
795 | p[1] = 0x0a; |
796 | |
797 | /* No changeable values for now */ |
798 | if (pc == 1) |
799 | goto out; |
800 | |
801 | out: |
802 | return 12; |
803 | } |
804 | |
805 | static struct { |
806 | uint8_t page; |
807 | uint8_t subpage; |
808 | int (*emulate)(struct se_device *, u8, unsigned char *); |
809 | } modesense_handlers[] = { |
810 | { .page = 0x01, .subpage = 0x00, .emulate = spc_modesense_rwrecovery }, |
811 | { .page = 0x08, .subpage = 0x00, .emulate = spc_modesense_caching }, |
812 | { .page = 0x0a, .subpage = 0x00, .emulate = spc_modesense_control }, |
813 | { .page = 0x1c, .subpage = 0x00, .emulate = spc_modesense_informational_exceptions }, |
814 | }; |
815 | |
816 | static void spc_modesense_write_protect(unsigned char *buf, int type) |
817 | { |
818 | /* |
819 | * I believe that the WP bit (bit 7) in the mode header is the same for |
820 | * all device types.. |
821 | */ |
822 | switch (type) { |
823 | case TYPE_DISK: |
824 | case TYPE_TAPE: |
825 | default: |
826 | buf[0] |= 0x80; /* WP bit */ |
827 | break; |
828 | } |
829 | } |
830 | |
831 | static void spc_modesense_dpofua(unsigned char *buf, int type) |
832 | { |
833 | switch (type) { |
834 | case TYPE_DISK: |
835 | buf[0] |= 0x10; /* DPOFUA bit */ |
836 | break; |
837 | default: |
838 | break; |
839 | } |
840 | } |
841 | |
842 | static int spc_modesense_blockdesc(unsigned char *buf, u64 blocks, u32 block_size) |
843 | { |
844 | *buf++ = 8; |
845 | put_unaligned_be32(min(blocks, 0xffffffffull), buf); |
846 | buf += 4; |
847 | put_unaligned_be32(block_size, buf); |
848 | return 9; |
849 | } |
850 | |
851 | static int spc_modesense_long_blockdesc(unsigned char *buf, u64 blocks, u32 block_size) |
852 | { |
853 | if (blocks <= 0xffffffff) |
854 | return spc_modesense_blockdesc(buf + 3, blocks, block_size) + 3; |
855 | |
856 | *buf++ = 1; /* LONGLBA */ |
857 | buf += 2; |
858 | *buf++ = 16; |
859 | put_unaligned_be64(blocks, buf); |
860 | buf += 12; |
861 | put_unaligned_be32(block_size, buf); |
862 | |
863 | return 17; |
864 | } |
865 | |
866 | static sense_reason_t spc_emulate_modesense(struct se_cmd *cmd) |
867 | { |
868 | struct se_device *dev = cmd->se_dev; |
869 | char *cdb = cmd->t_task_cdb; |
870 | unsigned char buf[SE_MODE_PAGE_BUF], *rbuf; |
871 | int type = dev->transport->get_device_type(dev); |
872 | int ten = (cmd->t_task_cdb[0] == MODE_SENSE_10); |
873 | bool dbd = !!(cdb[1] & 0x08); |
874 | bool llba = ten ? !!(cdb[1] & 0x10) : false; |
875 | u8 pc = cdb[2] >> 6; |
876 | u8 page = cdb[2] & 0x3f; |
877 | u8 subpage = cdb[3]; |
878 | int length = 0; |
879 | int ret; |
880 | int i; |
881 | |
882 | memset(buf, 0, SE_MODE_PAGE_BUF); |
883 | |
884 | /* |
885 | * Skip over MODE DATA LENGTH + MEDIUM TYPE fields to byte 3 for |
886 | * MODE_SENSE_10 and byte 2 for MODE_SENSE (6). |
887 | */ |
888 | length = ten ? 3 : 2; |
889 | |
890 | /* DEVICE-SPECIFIC PARAMETER */ |
891 | if ((cmd->se_lun->lun_access & TRANSPORT_LUNFLAGS_READ_ONLY) || |
892 | (cmd->se_deve && |
893 | (cmd->se_deve->lun_flags & TRANSPORT_LUNFLAGS_READ_ONLY))) |
894 | spc_modesense_write_protect(&buf[length], type); |
895 | |
896 | if ((spc_check_dev_wce(dev)) && |
897 | (dev->dev_attrib.emulate_fua_write > 0)) |
898 | spc_modesense_dpofua(&buf[length], type); |
899 | |
900 | ++length; |
901 | |
902 | /* BLOCK DESCRIPTOR */ |
903 | |
904 | /* |
905 | * For now we only include a block descriptor for disk (SBC) |
906 | * devices; other command sets use a slightly different format. |
907 | */ |
908 | if (!dbd && type == TYPE_DISK) { |
909 | u64 blocks = dev->transport->get_blocks(dev); |
910 | u32 block_size = dev->dev_attrib.block_size; |
911 | |
912 | if (ten) { |
913 | if (llba) { |
914 | length += spc_modesense_long_blockdesc(&buf[length], |
915 | blocks, block_size); |
916 | } else { |
917 | length += 3; |
918 | length += spc_modesense_blockdesc(&buf[length], |
919 | blocks, block_size); |
920 | } |
921 | } else { |
922 | length += spc_modesense_blockdesc(&buf[length], blocks, |
923 | block_size); |
924 | } |
925 | } else { |
926 | if (ten) |
927 | length += 4; |
928 | else |
929 | length += 1; |
930 | } |
931 | |
932 | if (page == 0x3f) { |
933 | if (subpage != 0x00 && subpage != 0xff) { |
934 | pr_warn("MODE_SENSE: Invalid subpage code: 0x%02x\n", subpage); |
935 | return TCM_INVALID_CDB_FIELD; |
936 | } |
937 | |
938 | for (i = 0; i < ARRAY_SIZE(modesense_handlers); ++i) { |
939 | /* |
940 | * Tricky way to say all subpage 00h for |
941 | * subpage==0, all subpages for subpage==0xff |
942 | * (and we just checked above that those are |
943 | * the only two possibilities). |
944 | */ |
945 | if ((modesense_handlers[i].subpage & ~subpage) == 0) { |
946 | ret = modesense_handlers[i].emulate(dev, pc, &buf[length]); |
947 | if (!ten && length + ret >= 255) |
948 | break; |
949 | length += ret; |
950 | } |
951 | } |
952 | |
953 | goto set_length; |
954 | } |
955 | |
956 | for (i = 0; i < ARRAY_SIZE(modesense_handlers); ++i) |
957 | if (modesense_handlers[i].page == page && |
958 | modesense_handlers[i].subpage == subpage) { |
959 | length += modesense_handlers[i].emulate(dev, pc, &buf[length]); |
960 | goto set_length; |
961 | } |
962 | |
963 | /* |
964 | * We don't intend to implement: |
965 | * - obsolete page 03h "format parameters" (checked by Solaris) |
966 | */ |
967 | if (page != 0x03) |
968 | pr_err("MODE SENSE: unimplemented page/subpage: 0x%02x/0x%02x\n", |
969 | page, subpage); |
970 | |
971 | return TCM_UNKNOWN_MODE_PAGE; |
972 | |
973 | set_length: |
974 | if (ten) |
975 | put_unaligned_be16(length - 2, buf); |
976 | else |
977 | buf[0] = length - 1; |
978 | |
979 | rbuf = transport_kmap_data_sg(cmd); |
980 | if (rbuf) { |
981 | memcpy(rbuf, buf, min_t(u32, SE_MODE_PAGE_BUF, cmd->data_length)); |
982 | transport_kunmap_data_sg(cmd); |
983 | } |
984 | |
985 | target_complete_cmd(cmd, GOOD); |
986 | return 0; |
987 | } |
988 | |
989 | static sense_reason_t spc_emulate_modeselect(struct se_cmd *cmd) |
990 | { |
991 | struct se_device *dev = cmd->se_dev; |
992 | char *cdb = cmd->t_task_cdb; |
993 | bool ten = cdb[0] == MODE_SELECT_10; |
994 | int off = ten ? 8 : 4; |
995 | bool pf = !!(cdb[1] & 0x10); |
996 | u8 page, subpage; |
997 | unsigned char *buf; |
998 | unsigned char tbuf[SE_MODE_PAGE_BUF]; |
999 | int length; |
1000 | int ret = 0; |
1001 | int i; |
1002 | |
1003 | if (!cmd->data_length) { |
1004 | target_complete_cmd(cmd, GOOD); |
1005 | return 0; |
1006 | } |
1007 | |
1008 | if (cmd->data_length < off + 2) |
1009 | return TCM_PARAMETER_LIST_LENGTH_ERROR; |
1010 | |
1011 | buf = transport_kmap_data_sg(cmd); |
1012 | if (!buf) |
1013 | return TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; |
1014 | |
1015 | if (!pf) { |
1016 | ret = TCM_INVALID_CDB_FIELD; |
1017 | goto out; |
1018 | } |
1019 | |
1020 | page = buf[off] & 0x3f; |
1021 | subpage = buf[off] & 0x40 ? buf[off + 1] : 0; |
1022 | |
1023 | for (i = 0; i < ARRAY_SIZE(modesense_handlers); ++i) |
1024 | if (modesense_handlers[i].page == page && |
1025 | modesense_handlers[i].subpage == subpage) { |
1026 | memset(tbuf, 0, SE_MODE_PAGE_BUF); |
1027 | length = modesense_handlers[i].emulate(dev, 0, tbuf); |
1028 | goto check_contents; |
1029 | } |
1030 | |
1031 | ret = TCM_UNKNOWN_MODE_PAGE; |
1032 | goto out; |
1033 | |
1034 | check_contents: |
1035 | if (cmd->data_length < off + length) { |
1036 | ret = TCM_PARAMETER_LIST_LENGTH_ERROR; |
1037 | goto out; |
1038 | } |
1039 | |
1040 | if (memcmp(buf + off, tbuf, length)) |
1041 | ret = TCM_INVALID_PARAMETER_LIST; |
1042 | |
1043 | out: |
1044 | transport_kunmap_data_sg(cmd); |
1045 | |
1046 | if (!ret) |
1047 | target_complete_cmd(cmd, GOOD); |
1048 | return ret; |
1049 | } |
1050 | |
1051 | static sense_reason_t spc_emulate_request_sense(struct se_cmd *cmd) |
1052 | { |
1053 | unsigned char *cdb = cmd->t_task_cdb; |
1054 | unsigned char *rbuf; |
1055 | u8 ua_asc = 0, ua_ascq = 0; |
1056 | unsigned char buf[SE_SENSE_BUF]; |
1057 | |
1058 | memset(buf, 0, SE_SENSE_BUF); |
1059 | |
1060 | if (cdb[1] & 0x01) { |
1061 | pr_err("REQUEST_SENSE description emulation not" |
1062 | " supported\n"); |
1063 | return TCM_INVALID_CDB_FIELD; |
1064 | } |
1065 | |
1066 | rbuf = transport_kmap_data_sg(cmd); |
1067 | if (!rbuf) |
1068 | return TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; |
1069 | |
1070 | if (!core_scsi3_ua_clear_for_request_sense(cmd, &ua_asc, &ua_ascq)) { |
1071 | /* |
1072 | * CURRENT ERROR, UNIT ATTENTION |
1073 | */ |
1074 | buf[0] = 0x70; |
1075 | buf[SPC_SENSE_KEY_OFFSET] = UNIT_ATTENTION; |
1076 | |
1077 | /* |
1078 | * The Additional Sense Code (ASC) from the UNIT ATTENTION |
1079 | */ |
1080 | buf[SPC_ASC_KEY_OFFSET] = ua_asc; |
1081 | buf[SPC_ASCQ_KEY_OFFSET] = ua_ascq; |
1082 | buf[7] = 0x0A; |
1083 | } else { |
1084 | /* |
1085 | * CURRENT ERROR, NO SENSE |
1086 | */ |
1087 | buf[0] = 0x70; |
1088 | buf[SPC_SENSE_KEY_OFFSET] = NO_SENSE; |
1089 | |
1090 | /* |
1091 | * NO ADDITIONAL SENSE INFORMATION |
1092 | */ |
1093 | buf[SPC_ASC_KEY_OFFSET] = 0x00; |
1094 | buf[7] = 0x0A; |
1095 | } |
1096 | |
1097 | memcpy(rbuf, buf, min_t(u32, sizeof(buf), cmd->data_length)); |
1098 | transport_kunmap_data_sg(cmd); |
1099 | |
1100 | target_complete_cmd(cmd, GOOD); |
1101 | return 0; |
1102 | } |
1103 | |
1104 | sense_reason_t spc_emulate_report_luns(struct se_cmd *cmd) |
1105 | { |
1106 | struct se_dev_entry *deve; |
1107 | struct se_session *sess = cmd->se_sess; |
1108 | unsigned char *buf; |
1109 | u32 lun_count = 0, offset = 8, i; |
1110 | |
1111 | if (cmd->data_length < 16) { |
1112 | pr_warn("REPORT LUNS allocation length %u too small\n", |
1113 | cmd->data_length); |
1114 | return TCM_INVALID_CDB_FIELD; |
1115 | } |
1116 | |
1117 | buf = transport_kmap_data_sg(cmd); |
1118 | if (!buf) |
1119 | return TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; |
1120 | |
1121 | /* |
1122 | * If no struct se_session pointer is present, this struct se_cmd is |
1123 | * coming via a target_core_mod PASSTHROUGH op, and not through |
1124 | * a $FABRIC_MOD. In that case, report LUN=0 only. |
1125 | */ |
1126 | if (!sess) { |
1127 | int_to_scsilun(0, (struct scsi_lun *)&buf[offset]); |
1128 | lun_count = 1; |
1129 | goto done; |
1130 | } |
1131 | |
1132 | spin_lock_irq(&sess->se_node_acl->device_list_lock); |
1133 | for (i = 0; i < TRANSPORT_MAX_LUNS_PER_TPG; i++) { |
1134 | deve = sess->se_node_acl->device_list[i]; |
1135 | if (!(deve->lun_flags & TRANSPORT_LUNFLAGS_INITIATOR_ACCESS)) |
1136 | continue; |
1137 | /* |
1138 | * We determine the correct LUN LIST LENGTH even once we |
1139 | * have reached the initial allocation length. |
1140 | * See SPC2-R20 7.19. |
1141 | */ |
1142 | lun_count++; |
1143 | if ((offset + 8) > cmd->data_length) |
1144 | continue; |
1145 | |
1146 | int_to_scsilun(deve->mapped_lun, (struct scsi_lun *)&buf[offset]); |
1147 | offset += 8; |
1148 | } |
1149 | spin_unlock_irq(&sess->se_node_acl->device_list_lock); |
1150 | |
1151 | /* |
1152 | * See SPC3 r07, page 159. |
1153 | */ |
1154 | done: |
1155 | lun_count *= 8; |
1156 | buf[0] = ((lun_count >> 24) & 0xff); |
1157 | buf[1] = ((lun_count >> 16) & 0xff); |
1158 | buf[2] = ((lun_count >> 8) & 0xff); |
1159 | buf[3] = (lun_count & 0xff); |
1160 | transport_kunmap_data_sg(cmd); |
1161 | |
1162 | target_complete_cmd(cmd, GOOD); |
1163 | return 0; |
1164 | } |
1165 | EXPORT_SYMBOL(spc_emulate_report_luns); |
1166 | |
1167 | static sense_reason_t |
1168 | spc_emulate_testunitready(struct se_cmd *cmd) |
1169 | { |
1170 | target_complete_cmd(cmd, GOOD); |
1171 | return 0; |
1172 | } |
1173 | |
1174 | sense_reason_t |
1175 | spc_parse_cdb(struct se_cmd *cmd, unsigned int *size) |
1176 | { |
1177 | struct se_device *dev = cmd->se_dev; |
1178 | unsigned char *cdb = cmd->t_task_cdb; |
1179 | |
1180 | switch (cdb[0]) { |
1181 | case MODE_SELECT: |
1182 | *size = cdb[4]; |
1183 | cmd->execute_cmd = spc_emulate_modeselect; |
1184 | break; |
1185 | case MODE_SELECT_10: |
1186 | *size = (cdb[7] << 8) + cdb[8]; |
1187 | cmd->execute_cmd = spc_emulate_modeselect; |
1188 | break; |
1189 | case MODE_SENSE: |
1190 | *size = cdb[4]; |
1191 | cmd->execute_cmd = spc_emulate_modesense; |
1192 | break; |
1193 | case MODE_SENSE_10: |
1194 | *size = (cdb[7] << 8) + cdb[8]; |
1195 | cmd->execute_cmd = spc_emulate_modesense; |
1196 | break; |
1197 | case LOG_SELECT: |
1198 | case LOG_SENSE: |
1199 | *size = (cdb[7] << 8) + cdb[8]; |
1200 | break; |
1201 | case PERSISTENT_RESERVE_IN: |
1202 | *size = (cdb[7] << 8) + cdb[8]; |
1203 | cmd->execute_cmd = target_scsi3_emulate_pr_in; |
1204 | break; |
1205 | case PERSISTENT_RESERVE_OUT: |
1206 | *size = (cdb[7] << 8) + cdb[8]; |
1207 | cmd->execute_cmd = target_scsi3_emulate_pr_out; |
1208 | break; |
1209 | case RELEASE: |
1210 | case RELEASE_10: |
1211 | if (cdb[0] == RELEASE_10) |
1212 | *size = (cdb[7] << 8) | cdb[8]; |
1213 | else |
1214 | *size = cmd->data_length; |
1215 | |
1216 | cmd->execute_cmd = target_scsi2_reservation_release; |
1217 | break; |
1218 | case RESERVE: |
1219 | case RESERVE_10: |
1220 | /* |
1221 | * The SPC-2 RESERVE does not contain a size in the SCSI CDB. |
1222 | * Assume the passthrough or $FABRIC_MOD will tell us about it. |
1223 | */ |
1224 | if (cdb[0] == RESERVE_10) |
1225 | *size = (cdb[7] << 8) | cdb[8]; |
1226 | else |
1227 | *size = cmd->data_length; |
1228 | |
1229 | cmd->execute_cmd = target_scsi2_reservation_reserve; |
1230 | break; |
1231 | case REQUEST_SENSE: |
1232 | *size = cdb[4]; |
1233 | cmd->execute_cmd = spc_emulate_request_sense; |
1234 | break; |
1235 | case INQUIRY: |
1236 | *size = (cdb[3] << 8) + cdb[4]; |
1237 | |
1238 | /* |
1239 | * Do implict HEAD_OF_QUEUE processing for INQUIRY. |
1240 | * See spc4r17 section 5.3 |
1241 | */ |
1242 | cmd->sam_task_attr = MSG_HEAD_TAG; |
1243 | cmd->execute_cmd = spc_emulate_inquiry; |
1244 | break; |
1245 | case SECURITY_PROTOCOL_IN: |
1246 | case SECURITY_PROTOCOL_OUT: |
1247 | *size = (cdb[6] << 24) | (cdb[7] << 16) | (cdb[8] << 8) | cdb[9]; |
1248 | break; |
1249 | case EXTENDED_COPY: |
1250 | case READ_ATTRIBUTE: |
1251 | case RECEIVE_COPY_RESULTS: |
1252 | case WRITE_ATTRIBUTE: |
1253 | *size = (cdb[10] << 24) | (cdb[11] << 16) | |
1254 | (cdb[12] << 8) | cdb[13]; |
1255 | break; |
1256 | case RECEIVE_DIAGNOSTIC: |
1257 | case SEND_DIAGNOSTIC: |
1258 | *size = (cdb[3] << 8) | cdb[4]; |
1259 | break; |
1260 | case WRITE_BUFFER: |
1261 | *size = (cdb[6] << 16) + (cdb[7] << 8) + cdb[8]; |
1262 | break; |
1263 | case REPORT_LUNS: |
1264 | cmd->execute_cmd = spc_emulate_report_luns; |
1265 | *size = (cdb[6] << 24) | (cdb[7] << 16) | (cdb[8] << 8) | cdb[9]; |
1266 | /* |
1267 | * Do implict HEAD_OF_QUEUE processing for REPORT_LUNS |
1268 | * See spc4r17 section 5.3 |
1269 | */ |
1270 | cmd->sam_task_attr = MSG_HEAD_TAG; |
1271 | break; |
1272 | case TEST_UNIT_READY: |
1273 | cmd->execute_cmd = spc_emulate_testunitready; |
1274 | *size = 0; |
1275 | break; |
1276 | case MAINTENANCE_IN: |
1277 | if (dev->transport->get_device_type(dev) != TYPE_ROM) { |
1278 | /* |
1279 | * MAINTENANCE_IN from SCC-2 |
1280 | * Check for emulated MI_REPORT_TARGET_PGS |
1281 | */ |
1282 | if ((cdb[1] & 0x1f) == MI_REPORT_TARGET_PGS) { |
1283 | cmd->execute_cmd = |
1284 | target_emulate_report_target_port_groups; |
1285 | } |
1286 | *size = get_unaligned_be32(&cdb[6]); |
1287 | } else { |
1288 | /* |
1289 | * GPCMD_SEND_KEY from multi media commands |
1290 | */ |
1291 | *size = get_unaligned_be16(&cdb[8]); |
1292 | } |
1293 | break; |
1294 | case MAINTENANCE_OUT: |
1295 | if (dev->transport->get_device_type(dev) != TYPE_ROM) { |
1296 | /* |
1297 | * MAINTENANCE_OUT from SCC-2 |
1298 | * Check for emulated MO_SET_TARGET_PGS. |
1299 | */ |
1300 | if (cdb[1] == MO_SET_TARGET_PGS) { |
1301 | cmd->execute_cmd = |
1302 | target_emulate_set_target_port_groups; |
1303 | } |
1304 | *size = get_unaligned_be32(&cdb[6]); |
1305 | } else { |
1306 | /* |
1307 | * GPCMD_SEND_KEY from multi media commands |
1308 | */ |
1309 | *size = get_unaligned_be16(&cdb[8]); |
1310 | } |
1311 | break; |
1312 | default: |
1313 | pr_warn("TARGET_CORE[%s]: Unsupported SCSI Opcode" |
1314 | " 0x%02x, sending CHECK_CONDITION.\n", |
1315 | cmd->se_tfo->get_fabric_name(), cdb[0]); |
1316 | return TCM_UNSUPPORTED_SCSI_OPCODE; |
1317 | } |
1318 | |
1319 | return 0; |
1320 | } |
1321 | EXPORT_SYMBOL(spc_parse_cdb); |
1322 |
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v2.6.34-rc5
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