Commit | Line | Data |
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88455ec4 CH |
1 | /* |
2 | * SCSI Primary Commands (SPC) parsing and emulation. | |
3 | * | |
4c76251e | 4 | * (c) Copyright 2002-2013 Datera, Inc. |
88455ec4 CH |
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" | |
eba2ca45 | 35 | #include "target_core_alua.h" |
88455ec4 CH |
36 | #include "target_core_pr.h" |
37 | #include "target_core_ua.h" | |
04b1b795 | 38 | #include "target_core_xcopy.h" |
88455ec4 | 39 | |
1fd032ee CH |
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 | /* | |
125d0119 | 51 | * Set TPGS field for explicit and/or implicit ALUA access type |
1fd032ee CH |
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 | ||
0dfa1c5d HR |
69 | sense_reason_t |
70 | spc_emulate_inquiry_std(struct se_cmd *cmd, unsigned char *buf) | |
1fd032ee CH |
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 | ||
48c2567d | 79 | buf[2] = 0x05; /* SPC-3 */ |
1fd032ee CH |
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 | */ | |
c87fbd56 | 96 | spc_fill_alua_data(lun->lun_sep, buf); |
1fd032ee | 97 | |
d397a445 NB |
98 | /* |
99 | * Set Third-Party Copy (3PC) bit to indicate support for EXTENDED_COPY | |
100 | */ | |
101 | if (dev->dev_attrib.emulate_3pc) | |
102 | buf[5] |= 0x8; | |
bdbad2bd NB |
103 | /* |
104 | * Set Protection (PROTECT) bit when DIF has been enabled. | |
105 | */ | |
106 | if (dev->dev_attrib.pi_prot_type) | |
107 | buf[5] |= 0x1; | |
d397a445 | 108 | |
1fd032ee CH |
109 | buf[7] = 0x2; /* CmdQue=1 */ |
110 | ||
ee60bddb NB |
111 | memcpy(&buf[8], "LIO-ORG ", 8); |
112 | memset(&buf[16], 0x20, 16); | |
113 | memcpy(&buf[16], dev->t10_wwn.model, | |
114 | min_t(size_t, strlen(dev->t10_wwn.model), 16)); | |
115 | memcpy(&buf[32], dev->t10_wwn.revision, | |
116 | min_t(size_t, strlen(dev->t10_wwn.revision), 4)); | |
1fd032ee CH |
117 | buf[4] = 31; /* Set additional length to 31 */ |
118 | ||
119 | return 0; | |
120 | } | |
0dfa1c5d | 121 | EXPORT_SYMBOL(spc_emulate_inquiry_std); |
1fd032ee CH |
122 | |
123 | /* unit serial number */ | |
de103c93 CH |
124 | static sense_reason_t |
125 | spc_emulate_evpd_80(struct se_cmd *cmd, unsigned char *buf) | |
1fd032ee CH |
126 | { |
127 | struct se_device *dev = cmd->se_dev; | |
128 | u16 len = 0; | |
129 | ||
0fd97ccf | 130 | if (dev->dev_flags & DF_EMULATED_VPD_UNIT_SERIAL) { |
1fd032ee CH |
131 | u32 unit_serial_len; |
132 | ||
0fd97ccf | 133 | unit_serial_len = strlen(dev->t10_wwn.unit_serial); |
1fd032ee CH |
134 | unit_serial_len++; /* For NULL Terminator */ |
135 | ||
0fd97ccf | 136 | len += sprintf(&buf[4], "%s", dev->t10_wwn.unit_serial); |
1fd032ee CH |
137 | len++; /* Extra Byte for NULL Terminator */ |
138 | buf[3] = len; | |
139 | } | |
140 | return 0; | |
141 | } | |
142 | ||
68366026 NB |
143 | void spc_parse_naa_6h_vendor_specific(struct se_device *dev, |
144 | unsigned char *buf) | |
1fd032ee | 145 | { |
0fd97ccf | 146 | unsigned char *p = &dev->t10_wwn.unit_serial[0]; |
1fd032ee CH |
147 | int cnt; |
148 | bool next = true; | |
149 | ||
150 | /* | |
151 | * Generate up to 36 bits of VENDOR SPECIFIC IDENTIFIER starting on | |
152 | * byte 3 bit 3-0 for NAA IEEE Registered Extended DESIGNATOR field | |
153 | * format, followed by 64 bits of VENDOR SPECIFIC IDENTIFIER EXTENSION | |
154 | * to complete the payload. These are based from VPD=0x80 PRODUCT SERIAL | |
155 | * NUMBER set via vpd_unit_serial in target_core_configfs.c to ensure | |
156 | * per device uniqeness. | |
157 | */ | |
158 | for (cnt = 0; *p && cnt < 13; p++) { | |
159 | int val = hex_to_bin(*p); | |
160 | ||
161 | if (val < 0) | |
162 | continue; | |
163 | ||
164 | if (next) { | |
165 | next = false; | |
166 | buf[cnt++] |= val; | |
167 | } else { | |
168 | next = true; | |
169 | buf[cnt] = val << 4; | |
170 | } | |
171 | } | |
172 | } | |
173 | ||
174 | /* | |
175 | * Device identification VPD, for a complete list of | |
176 | * DESIGNATOR TYPEs see spc4r17 Table 459. | |
177 | */ | |
0dfa1c5d | 178 | sense_reason_t |
de103c93 | 179 | spc_emulate_evpd_83(struct se_cmd *cmd, unsigned char *buf) |
1fd032ee CH |
180 | { |
181 | struct se_device *dev = cmd->se_dev; | |
182 | struct se_lun *lun = cmd->se_lun; | |
183 | struct se_port *port = NULL; | |
184 | struct se_portal_group *tpg = NULL; | |
185 | struct t10_alua_lu_gp_member *lu_gp_mem; | |
186 | struct t10_alua_tg_pt_gp *tg_pt_gp; | |
187 | struct t10_alua_tg_pt_gp_member *tg_pt_gp_mem; | |
0fd97ccf | 188 | unsigned char *prod = &dev->t10_wwn.model[0]; |
1fd032ee CH |
189 | u32 prod_len; |
190 | u32 unit_serial_len, off = 0; | |
191 | u16 len = 0, id_len; | |
192 | ||
193 | off = 4; | |
194 | ||
195 | /* | |
196 | * NAA IEEE Registered Extended Assigned designator format, see | |
197 | * spc4r17 section 7.7.3.6.5 | |
198 | * | |
199 | * We depend upon a target_core_mod/ConfigFS provided | |
200 | * /sys/kernel/config/target/core/$HBA/$DEV/wwn/vpd_unit_serial | |
201 | * value in order to return the NAA id. | |
202 | */ | |
0fd97ccf | 203 | if (!(dev->dev_flags & DF_EMULATED_VPD_UNIT_SERIAL)) |
1fd032ee CH |
204 | goto check_t10_vend_desc; |
205 | ||
206 | /* CODE SET == Binary */ | |
207 | buf[off++] = 0x1; | |
208 | ||
209 | /* Set ASSOCIATION == addressed logical unit: 0)b */ | |
210 | buf[off] = 0x00; | |
211 | ||
212 | /* Identifier/Designator type == NAA identifier */ | |
213 | buf[off++] |= 0x3; | |
214 | off++; | |
215 | ||
216 | /* Identifier/Designator length */ | |
217 | buf[off++] = 0x10; | |
218 | ||
219 | /* | |
220 | * Start NAA IEEE Registered Extended Identifier/Designator | |
221 | */ | |
222 | buf[off++] = (0x6 << 4); | |
223 | ||
224 | /* | |
225 | * Use OpenFabrics IEEE Company ID: 00 14 05 | |
226 | */ | |
227 | buf[off++] = 0x01; | |
228 | buf[off++] = 0x40; | |
229 | buf[off] = (0x5 << 4); | |
230 | ||
231 | /* | |
232 | * Return ConfigFS Unit Serial Number information for | |
233 | * VENDOR_SPECIFIC_IDENTIFIER and | |
234 | * VENDOR_SPECIFIC_IDENTIFIER_EXTENTION | |
235 | */ | |
236 | spc_parse_naa_6h_vendor_specific(dev, &buf[off]); | |
237 | ||
238 | len = 20; | |
239 | off = (len + 4); | |
240 | ||
241 | check_t10_vend_desc: | |
242 | /* | |
243 | * T10 Vendor Identifier Page, see spc4r17 section 7.7.3.4 | |
244 | */ | |
245 | id_len = 8; /* For Vendor field */ | |
246 | prod_len = 4; /* For VPD Header */ | |
247 | prod_len += 8; /* For Vendor field */ | |
248 | prod_len += strlen(prod); | |
249 | prod_len++; /* For : */ | |
250 | ||
0fd97ccf CH |
251 | if (dev->dev_flags & DF_EMULATED_VPD_UNIT_SERIAL) { |
252 | unit_serial_len = strlen(&dev->t10_wwn.unit_serial[0]); | |
1fd032ee CH |
253 | unit_serial_len++; /* For NULL Terminator */ |
254 | ||
255 | id_len += sprintf(&buf[off+12], "%s:%s", prod, | |
0fd97ccf | 256 | &dev->t10_wwn.unit_serial[0]); |
1fd032ee CH |
257 | } |
258 | buf[off] = 0x2; /* ASCII */ | |
259 | buf[off+1] = 0x1; /* T10 Vendor ID */ | |
260 | buf[off+2] = 0x0; | |
261 | memcpy(&buf[off+4], "LIO-ORG", 8); | |
262 | /* Extra Byte for NULL Terminator */ | |
263 | id_len++; | |
264 | /* Identifier Length */ | |
265 | buf[off+3] = id_len; | |
266 | /* Header size for Designation descriptor */ | |
267 | len += (id_len + 4); | |
268 | off += (id_len + 4); | |
269 | /* | |
270 | * struct se_port is only set for INQUIRY VPD=1 through $FABRIC_MOD | |
271 | */ | |
272 | port = lun->lun_sep; | |
273 | if (port) { | |
274 | struct t10_alua_lu_gp *lu_gp; | |
fbfe858f | 275 | u32 padding, scsi_name_len, scsi_target_len; |
1fd032ee CH |
276 | u16 lu_gp_id = 0; |
277 | u16 tg_pt_gp_id = 0; | |
278 | u16 tpgt; | |
279 | ||
280 | tpg = port->sep_tpg; | |
281 | /* | |
282 | * Relative target port identifer, see spc4r17 | |
283 | * section 7.7.3.7 | |
284 | * | |
285 | * Get the PROTOCOL IDENTIFIER as defined by spc4r17 | |
286 | * section 7.5.1 Table 362 | |
287 | */ | |
288 | buf[off] = | |
289 | (tpg->se_tpg_tfo->get_fabric_proto_ident(tpg) << 4); | |
290 | buf[off++] |= 0x1; /* CODE SET == Binary */ | |
291 | buf[off] = 0x80; /* Set PIV=1 */ | |
292 | /* Set ASSOCIATION == target port: 01b */ | |
293 | buf[off] |= 0x10; | |
294 | /* DESIGNATOR TYPE == Relative target port identifer */ | |
295 | buf[off++] |= 0x4; | |
296 | off++; /* Skip over Reserved */ | |
297 | buf[off++] = 4; /* DESIGNATOR LENGTH */ | |
298 | /* Skip over Obsolete field in RTPI payload | |
299 | * in Table 472 */ | |
300 | off += 2; | |
301 | buf[off++] = ((port->sep_rtpi >> 8) & 0xff); | |
302 | buf[off++] = (port->sep_rtpi & 0xff); | |
303 | len += 8; /* Header size + Designation descriptor */ | |
304 | /* | |
305 | * Target port group identifier, see spc4r17 | |
306 | * section 7.7.3.8 | |
307 | * | |
308 | * Get the PROTOCOL IDENTIFIER as defined by spc4r17 | |
309 | * section 7.5.1 Table 362 | |
310 | */ | |
1fd032ee CH |
311 | tg_pt_gp_mem = port->sep_alua_tg_pt_gp_mem; |
312 | if (!tg_pt_gp_mem) | |
313 | goto check_lu_gp; | |
314 | ||
315 | spin_lock(&tg_pt_gp_mem->tg_pt_gp_mem_lock); | |
316 | tg_pt_gp = tg_pt_gp_mem->tg_pt_gp; | |
317 | if (!tg_pt_gp) { | |
318 | spin_unlock(&tg_pt_gp_mem->tg_pt_gp_mem_lock); | |
319 | goto check_lu_gp; | |
320 | } | |
321 | tg_pt_gp_id = tg_pt_gp->tg_pt_gp_id; | |
322 | spin_unlock(&tg_pt_gp_mem->tg_pt_gp_mem_lock); | |
323 | ||
324 | buf[off] = | |
325 | (tpg->se_tpg_tfo->get_fabric_proto_ident(tpg) << 4); | |
326 | buf[off++] |= 0x1; /* CODE SET == Binary */ | |
327 | buf[off] = 0x80; /* Set PIV=1 */ | |
328 | /* Set ASSOCIATION == target port: 01b */ | |
329 | buf[off] |= 0x10; | |
330 | /* DESIGNATOR TYPE == Target port group identifier */ | |
331 | buf[off++] |= 0x5; | |
332 | off++; /* Skip over Reserved */ | |
333 | buf[off++] = 4; /* DESIGNATOR LENGTH */ | |
334 | off += 2; /* Skip over Reserved Field */ | |
335 | buf[off++] = ((tg_pt_gp_id >> 8) & 0xff); | |
336 | buf[off++] = (tg_pt_gp_id & 0xff); | |
337 | len += 8; /* Header size + Designation descriptor */ | |
338 | /* | |
339 | * Logical Unit Group identifier, see spc4r17 | |
340 | * section 7.7.3.8 | |
341 | */ | |
342 | check_lu_gp: | |
343 | lu_gp_mem = dev->dev_alua_lu_gp_mem; | |
344 | if (!lu_gp_mem) | |
345 | goto check_scsi_name; | |
346 | ||
347 | spin_lock(&lu_gp_mem->lu_gp_mem_lock); | |
348 | lu_gp = lu_gp_mem->lu_gp; | |
349 | if (!lu_gp) { | |
350 | spin_unlock(&lu_gp_mem->lu_gp_mem_lock); | |
351 | goto check_scsi_name; | |
352 | } | |
353 | lu_gp_id = lu_gp->lu_gp_id; | |
354 | spin_unlock(&lu_gp_mem->lu_gp_mem_lock); | |
355 | ||
356 | buf[off++] |= 0x1; /* CODE SET == Binary */ | |
357 | /* DESIGNATOR TYPE == Logical Unit Group identifier */ | |
358 | buf[off++] |= 0x6; | |
359 | off++; /* Skip over Reserved */ | |
360 | buf[off++] = 4; /* DESIGNATOR LENGTH */ | |
361 | off += 2; /* Skip over Reserved Field */ | |
362 | buf[off++] = ((lu_gp_id >> 8) & 0xff); | |
363 | buf[off++] = (lu_gp_id & 0xff); | |
364 | len += 8; /* Header size + Designation descriptor */ | |
365 | /* | |
366 | * SCSI name string designator, see spc4r17 | |
367 | * section 7.7.3.11 | |
368 | * | |
369 | * Get the PROTOCOL IDENTIFIER as defined by spc4r17 | |
370 | * section 7.5.1 Table 362 | |
371 | */ | |
372 | check_scsi_name: | |
1fd032ee CH |
373 | buf[off] = |
374 | (tpg->se_tpg_tfo->get_fabric_proto_ident(tpg) << 4); | |
375 | buf[off++] |= 0x3; /* CODE SET == UTF-8 */ | |
376 | buf[off] = 0x80; /* Set PIV=1 */ | |
377 | /* Set ASSOCIATION == target port: 01b */ | |
378 | buf[off] |= 0x10; | |
379 | /* DESIGNATOR TYPE == SCSI name string */ | |
380 | buf[off++] |= 0x8; | |
381 | off += 2; /* Skip over Reserved and length */ | |
382 | /* | |
383 | * SCSI name string identifer containing, $FABRIC_MOD | |
384 | * dependent information. For LIO-Target and iSCSI | |
385 | * Target Port, this means "<iSCSI name>,t,0x<TPGT> in | |
386 | * UTF-8 encoding. | |
387 | */ | |
388 | tpgt = tpg->se_tpg_tfo->tpg_get_tag(tpg); | |
389 | scsi_name_len = sprintf(&buf[off], "%s,t,0x%04x", | |
390 | tpg->se_tpg_tfo->tpg_get_wwn(tpg), tpgt); | |
391 | scsi_name_len += 1 /* Include NULL terminator */; | |
392 | /* | |
393 | * The null-terminated, null-padded (see 4.4.2) SCSI | |
394 | * NAME STRING field contains a UTF-8 format string. | |
395 | * The number of bytes in the SCSI NAME STRING field | |
396 | * (i.e., the value in the DESIGNATOR LENGTH field) | |
397 | * shall be no larger than 256 and shall be a multiple | |
398 | * of four. | |
399 | */ | |
03ba84ca | 400 | padding = ((-scsi_name_len) & 3); |
1fd032ee CH |
401 | if (padding) |
402 | scsi_name_len += padding; | |
03ba84ca HR |
403 | if (scsi_name_len > 256) |
404 | scsi_name_len = 256; | |
1fd032ee CH |
405 | |
406 | buf[off-1] = scsi_name_len; | |
407 | off += scsi_name_len; | |
408 | /* Header size + Designation descriptor */ | |
409 | len += (scsi_name_len + 4); | |
fbfe858f HR |
410 | |
411 | /* | |
412 | * Target device designator | |
413 | */ | |
414 | buf[off] = | |
415 | (tpg->se_tpg_tfo->get_fabric_proto_ident(tpg) << 4); | |
416 | buf[off++] |= 0x3; /* CODE SET == UTF-8 */ | |
417 | buf[off] = 0x80; /* Set PIV=1 */ | |
418 | /* Set ASSOCIATION == target device: 10b */ | |
419 | buf[off] |= 0x20; | |
420 | /* DESIGNATOR TYPE == SCSI name string */ | |
421 | buf[off++] |= 0x8; | |
422 | off += 2; /* Skip over Reserved and length */ | |
423 | /* | |
424 | * SCSI name string identifer containing, $FABRIC_MOD | |
425 | * dependent information. For LIO-Target and iSCSI | |
426 | * Target Port, this means "<iSCSI name>" in | |
427 | * UTF-8 encoding. | |
428 | */ | |
429 | scsi_target_len = sprintf(&buf[off], "%s", | |
430 | tpg->se_tpg_tfo->tpg_get_wwn(tpg)); | |
431 | scsi_target_len += 1 /* Include NULL terminator */; | |
432 | /* | |
433 | * The null-terminated, null-padded (see 4.4.2) SCSI | |
434 | * NAME STRING field contains a UTF-8 format string. | |
435 | * The number of bytes in the SCSI NAME STRING field | |
436 | * (i.e., the value in the DESIGNATOR LENGTH field) | |
437 | * shall be no larger than 256 and shall be a multiple | |
438 | * of four. | |
439 | */ | |
440 | padding = ((-scsi_target_len) & 3); | |
441 | if (padding) | |
442 | scsi_target_len += padding; | |
443 | if (scsi_name_len > 256) | |
444 | scsi_name_len = 256; | |
445 | ||
446 | buf[off-1] = scsi_target_len; | |
447 | off += scsi_target_len; | |
448 | ||
449 | /* Header size + Designation descriptor */ | |
450 | len += (scsi_target_len + 4); | |
1fd032ee CH |
451 | } |
452 | buf[2] = ((len >> 8) & 0xff); | |
453 | buf[3] = (len & 0xff); /* Page Length for VPD 0x83 */ | |
454 | return 0; | |
455 | } | |
0dfa1c5d | 456 | EXPORT_SYMBOL(spc_emulate_evpd_83); |
1fd032ee | 457 | |
d0c8b259 NB |
458 | static bool |
459 | spc_check_dev_wce(struct se_device *dev) | |
460 | { | |
461 | bool wce = false; | |
462 | ||
463 | if (dev->transport->get_write_cache) | |
464 | wce = dev->transport->get_write_cache(dev); | |
465 | else if (dev->dev_attrib.emulate_write_cache > 0) | |
466 | wce = true; | |
467 | ||
468 | return wce; | |
469 | } | |
470 | ||
1fd032ee | 471 | /* Extended INQUIRY Data VPD Page */ |
de103c93 CH |
472 | static sense_reason_t |
473 | spc_emulate_evpd_86(struct se_cmd *cmd, unsigned char *buf) | |
1fd032ee | 474 | { |
d0c8b259 NB |
475 | struct se_device *dev = cmd->se_dev; |
476 | ||
1fd032ee | 477 | buf[3] = 0x3c; |
43bb95c7 NB |
478 | /* |
479 | * Set GRD_CHK + REF_CHK for TYPE1 protection, or GRD_CHK | |
480 | * only for TYPE3 protection. | |
481 | */ | |
482 | if (dev->dev_attrib.pi_prot_type == TARGET_DIF_TYPE1_PROT) | |
483 | buf[4] = 0x5; | |
484 | else if (dev->dev_attrib.pi_prot_type == TARGET_DIF_TYPE3_PROT) | |
485 | buf[4] = 0x4; | |
486 | ||
1fd032ee CH |
487 | /* Set HEADSUP, ORDSUP, SIMPSUP */ |
488 | buf[5] = 0x07; | |
489 | ||
490 | /* If WriteCache emulation is enabled, set V_SUP */ | |
d0c8b259 | 491 | if (spc_check_dev_wce(dev)) |
1fd032ee | 492 | buf[6] = 0x01; |
c66094bf HR |
493 | /* If an LBA map is present set R_SUP */ |
494 | spin_lock(&cmd->se_dev->t10_alua.lba_map_lock); | |
495 | if (!list_empty(&dev->t10_alua.lba_map_list)) | |
496 | buf[8] = 0x10; | |
497 | spin_unlock(&cmd->se_dev->t10_alua.lba_map_lock); | |
1fd032ee CH |
498 | return 0; |
499 | } | |
500 | ||
501 | /* Block Limits VPD page */ | |
de103c93 CH |
502 | static sense_reason_t |
503 | spc_emulate_evpd_b0(struct se_cmd *cmd, unsigned char *buf) | |
1fd032ee CH |
504 | { |
505 | struct se_device *dev = cmd->se_dev; | |
506 | u32 max_sectors; | |
507 | int have_tp = 0; | |
7f7caf6a | 508 | int opt, min; |
1fd032ee CH |
509 | |
510 | /* | |
511 | * Following spc3r22 section 6.5.3 Block Limits VPD page, when | |
512 | * emulate_tpu=1 or emulate_tpws=1 we will be expect a | |
513 | * different page length for Thin Provisioning. | |
514 | */ | |
0fd97ccf | 515 | if (dev->dev_attrib.emulate_tpu || dev->dev_attrib.emulate_tpws) |
1fd032ee CH |
516 | have_tp = 1; |
517 | ||
518 | buf[0] = dev->transport->get_device_type(dev); | |
519 | buf[3] = have_tp ? 0x3c : 0x10; | |
520 | ||
521 | /* Set WSNZ to 1 */ | |
522 | buf[4] = 0x01; | |
0123a9ec NB |
523 | /* |
524 | * Set MAXIMUM COMPARE AND WRITE LENGTH | |
525 | */ | |
526 | if (dev->dev_attrib.emulate_caw) | |
527 | buf[5] = 0x01; | |
1fd032ee CH |
528 | |
529 | /* | |
530 | * Set OPTIMAL TRANSFER LENGTH GRANULARITY | |
531 | */ | |
7f7caf6a AG |
532 | if (dev->transport->get_io_min && (min = dev->transport->get_io_min(dev))) |
533 | put_unaligned_be16(min / dev->dev_attrib.block_size, &buf[6]); | |
534 | else | |
535 | put_unaligned_be16(1, &buf[6]); | |
1fd032ee CH |
536 | |
537 | /* | |
538 | * Set MAXIMUM TRANSFER LENGTH | |
539 | */ | |
0fd97ccf CH |
540 | max_sectors = min(dev->dev_attrib.fabric_max_sectors, |
541 | dev->dev_attrib.hw_max_sectors); | |
1fd032ee CH |
542 | put_unaligned_be32(max_sectors, &buf[8]); |
543 | ||
544 | /* | |
545 | * Set OPTIMAL TRANSFER LENGTH | |
546 | */ | |
7f7caf6a AG |
547 | if (dev->transport->get_io_opt && (opt = dev->transport->get_io_opt(dev))) |
548 | put_unaligned_be32(opt / dev->dev_attrib.block_size, &buf[12]); | |
549 | else | |
550 | put_unaligned_be32(dev->dev_attrib.optimal_sectors, &buf[12]); | |
1fd032ee CH |
551 | |
552 | /* | |
553 | * Exit now if we don't support TP. | |
554 | */ | |
555 | if (!have_tp) | |
773cbaf7 | 556 | goto max_write_same; |
1fd032ee CH |
557 | |
558 | /* | |
559 | * Set MAXIMUM UNMAP LBA COUNT | |
560 | */ | |
0fd97ccf | 561 | put_unaligned_be32(dev->dev_attrib.max_unmap_lba_count, &buf[20]); |
1fd032ee CH |
562 | |
563 | /* | |
564 | * Set MAXIMUM UNMAP BLOCK DESCRIPTOR COUNT | |
565 | */ | |
0fd97ccf | 566 | put_unaligned_be32(dev->dev_attrib.max_unmap_block_desc_count, |
1fd032ee CH |
567 | &buf[24]); |
568 | ||
569 | /* | |
570 | * Set OPTIMAL UNMAP GRANULARITY | |
571 | */ | |
0fd97ccf | 572 | put_unaligned_be32(dev->dev_attrib.unmap_granularity, &buf[28]); |
1fd032ee CH |
573 | |
574 | /* | |
575 | * UNMAP GRANULARITY ALIGNMENT | |
576 | */ | |
0fd97ccf | 577 | put_unaligned_be32(dev->dev_attrib.unmap_granularity_alignment, |
1fd032ee | 578 | &buf[32]); |
0fd97ccf | 579 | if (dev->dev_attrib.unmap_granularity_alignment != 0) |
1fd032ee CH |
580 | buf[32] |= 0x80; /* Set the UGAVALID bit */ |
581 | ||
773cbaf7 NB |
582 | /* |
583 | * MAXIMUM WRITE SAME LENGTH | |
584 | */ | |
585 | max_write_same: | |
586 | put_unaligned_be64(dev->dev_attrib.max_write_same_len, &buf[36]); | |
587 | ||
1fd032ee CH |
588 | return 0; |
589 | } | |
590 | ||
591 | /* Block Device Characteristics VPD page */ | |
de103c93 CH |
592 | static sense_reason_t |
593 | spc_emulate_evpd_b1(struct se_cmd *cmd, unsigned char *buf) | |
1fd032ee CH |
594 | { |
595 | struct se_device *dev = cmd->se_dev; | |
596 | ||
597 | buf[0] = dev->transport->get_device_type(dev); | |
598 | buf[3] = 0x3c; | |
0fd97ccf | 599 | buf[5] = dev->dev_attrib.is_nonrot ? 1 : 0; |
1fd032ee CH |
600 | |
601 | return 0; | |
602 | } | |
603 | ||
604 | /* Thin Provisioning VPD */ | |
de103c93 CH |
605 | static sense_reason_t |
606 | spc_emulate_evpd_b2(struct se_cmd *cmd, unsigned char *buf) | |
1fd032ee CH |
607 | { |
608 | struct se_device *dev = cmd->se_dev; | |
609 | ||
610 | /* | |
611 | * From spc3r22 section 6.5.4 Thin Provisioning VPD page: | |
612 | * | |
613 | * The PAGE LENGTH field is defined in SPC-4. If the DP bit is set to | |
614 | * zero, then the page length shall be set to 0004h. If the DP bit | |
615 | * is set to one, then the page length shall be set to the value | |
616 | * defined in table 162. | |
617 | */ | |
618 | buf[0] = dev->transport->get_device_type(dev); | |
619 | ||
620 | /* | |
621 | * Set Hardcoded length mentioned above for DP=0 | |
622 | */ | |
623 | put_unaligned_be16(0x0004, &buf[2]); | |
624 | ||
625 | /* | |
626 | * The THRESHOLD EXPONENT field indicates the threshold set size in | |
627 | * LBAs as a power of 2 (i.e., the threshold set size is equal to | |
628 | * 2(threshold exponent)). | |
629 | * | |
630 | * Note that this is currently set to 0x00 as mkp says it will be | |
631 | * changing again. We can enable this once it has settled in T10 | |
632 | * and is actually used by Linux/SCSI ML code. | |
633 | */ | |
634 | buf[4] = 0x00; | |
635 | ||
636 | /* | |
637 | * A TPU bit set to one indicates that the device server supports | |
638 | * the UNMAP command (see 5.25). A TPU bit set to zero indicates | |
639 | * that the device server does not support the UNMAP command. | |
640 | */ | |
0fd97ccf | 641 | if (dev->dev_attrib.emulate_tpu != 0) |
1fd032ee CH |
642 | buf[5] = 0x80; |
643 | ||
644 | /* | |
645 | * A TPWS bit set to one indicates that the device server supports | |
646 | * the use of the WRITE SAME (16) command (see 5.42) to unmap LBAs. | |
647 | * A TPWS bit set to zero indicates that the device server does not | |
648 | * support the use of the WRITE SAME (16) command to unmap LBAs. | |
649 | */ | |
0fd97ccf | 650 | if (dev->dev_attrib.emulate_tpws != 0) |
1fd032ee CH |
651 | buf[5] |= 0x40; |
652 | ||
653 | return 0; | |
654 | } | |
655 | ||
c66094bf HR |
656 | /* Referrals VPD page */ |
657 | static sense_reason_t | |
658 | spc_emulate_evpd_b3(struct se_cmd *cmd, unsigned char *buf) | |
659 | { | |
660 | struct se_device *dev = cmd->se_dev; | |
661 | ||
662 | buf[0] = dev->transport->get_device_type(dev); | |
663 | buf[3] = 0x0c; | |
664 | put_unaligned_be32(dev->t10_alua.lba_map_segment_size, &buf[8]); | |
665 | put_unaligned_be32(dev->t10_alua.lba_map_segment_size, &buf[12]); | |
666 | ||
667 | return 0; | |
668 | } | |
669 | ||
de103c93 CH |
670 | static sense_reason_t |
671 | spc_emulate_evpd_00(struct se_cmd *cmd, unsigned char *buf); | |
1fd032ee CH |
672 | |
673 | static struct { | |
674 | uint8_t page; | |
de103c93 | 675 | sense_reason_t (*emulate)(struct se_cmd *, unsigned char *); |
1fd032ee CH |
676 | } evpd_handlers[] = { |
677 | { .page = 0x00, .emulate = spc_emulate_evpd_00 }, | |
678 | { .page = 0x80, .emulate = spc_emulate_evpd_80 }, | |
679 | { .page = 0x83, .emulate = spc_emulate_evpd_83 }, | |
680 | { .page = 0x86, .emulate = spc_emulate_evpd_86 }, | |
681 | { .page = 0xb0, .emulate = spc_emulate_evpd_b0 }, | |
682 | { .page = 0xb1, .emulate = spc_emulate_evpd_b1 }, | |
683 | { .page = 0xb2, .emulate = spc_emulate_evpd_b2 }, | |
c66094bf | 684 | { .page = 0xb3, .emulate = spc_emulate_evpd_b3 }, |
1fd032ee CH |
685 | }; |
686 | ||
687 | /* supported vital product data pages */ | |
de103c93 CH |
688 | static sense_reason_t |
689 | spc_emulate_evpd_00(struct se_cmd *cmd, unsigned char *buf) | |
1fd032ee CH |
690 | { |
691 | int p; | |
692 | ||
693 | /* | |
694 | * Only report the INQUIRY EVPD=1 pages after a valid NAA | |
695 | * Registered Extended LUN WWN has been set via ConfigFS | |
696 | * during device creation/restart. | |
697 | */ | |
0fd97ccf | 698 | if (cmd->se_dev->dev_flags & DF_EMULATED_VPD_UNIT_SERIAL) { |
1fd032ee CH |
699 | buf[3] = ARRAY_SIZE(evpd_handlers); |
700 | for (p = 0; p < ARRAY_SIZE(evpd_handlers); ++p) | |
701 | buf[p + 4] = evpd_handlers[p].page; | |
702 | } | |
703 | ||
704 | return 0; | |
705 | } | |
706 | ||
de103c93 CH |
707 | static sense_reason_t |
708 | spc_emulate_inquiry(struct se_cmd *cmd) | |
1fd032ee CH |
709 | { |
710 | struct se_device *dev = cmd->se_dev; | |
711 | struct se_portal_group *tpg = cmd->se_lun->lun_sep->sep_tpg; | |
ffe7b0e9 | 712 | unsigned char *rbuf; |
1fd032ee | 713 | unsigned char *cdb = cmd->t_task_cdb; |
f82f320e | 714 | unsigned char *buf; |
de103c93 CH |
715 | sense_reason_t ret; |
716 | int p; | |
1fd032ee | 717 | |
f82f320e NB |
718 | buf = kzalloc(SE_INQUIRY_BUF, GFP_KERNEL); |
719 | if (!buf) { | |
720 | pr_err("Unable to allocate response buffer for INQUIRY\n"); | |
721 | return TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; | |
722 | } | |
dea5f099 | 723 | |
1fd032ee CH |
724 | if (dev == tpg->tpg_virt_lun0.lun_se_dev) |
725 | buf[0] = 0x3f; /* Not connected */ | |
726 | else | |
727 | buf[0] = dev->transport->get_device_type(dev); | |
728 | ||
729 | if (!(cdb[1] & 0x1)) { | |
730 | if (cdb[2]) { | |
731 | pr_err("INQUIRY with EVPD==0 but PAGE CODE=%02x\n", | |
732 | cdb[2]); | |
de103c93 | 733 | ret = TCM_INVALID_CDB_FIELD; |
1fd032ee CH |
734 | goto out; |
735 | } | |
736 | ||
737 | ret = spc_emulate_inquiry_std(cmd, buf); | |
738 | goto out; | |
739 | } | |
740 | ||
741 | for (p = 0; p < ARRAY_SIZE(evpd_handlers); ++p) { | |
742 | if (cdb[2] == evpd_handlers[p].page) { | |
743 | buf[1] = cdb[2]; | |
744 | ret = evpd_handlers[p].emulate(cmd, buf); | |
745 | goto out; | |
746 | } | |
747 | } | |
748 | ||
749 | pr_err("Unknown VPD Code: 0x%02x\n", cdb[2]); | |
de103c93 | 750 | ret = TCM_INVALID_CDB_FIELD; |
1fd032ee CH |
751 | |
752 | out: | |
ffe7b0e9 | 753 | rbuf = transport_kmap_data_sg(cmd); |
49df9fc9 | 754 | if (rbuf) { |
f82f320e | 755 | memcpy(rbuf, buf, min_t(u32, SE_INQUIRY_BUF, cmd->data_length)); |
49df9fc9 NB |
756 | transport_kunmap_data_sg(cmd); |
757 | } | |
f82f320e | 758 | kfree(buf); |
1fd032ee CH |
759 | |
760 | if (!ret) | |
761 | target_complete_cmd(cmd, GOOD); | |
762 | return ret; | |
763 | } | |
764 | ||
d4b2b867 | 765 | static int spc_modesense_rwrecovery(struct se_device *dev, u8 pc, u8 *p) |
1fd032ee CH |
766 | { |
767 | p[0] = 0x01; | |
768 | p[1] = 0x0a; | |
769 | ||
d4b2b867 RD |
770 | /* No changeable values for now */ |
771 | if (pc == 1) | |
772 | goto out; | |
773 | ||
774 | out: | |
1fd032ee CH |
775 | return 12; |
776 | } | |
777 | ||
d4b2b867 | 778 | static int spc_modesense_control(struct se_device *dev, u8 pc, u8 *p) |
1fd032ee CH |
779 | { |
780 | p[0] = 0x0a; | |
781 | p[1] = 0x0a; | |
d4b2b867 RD |
782 | |
783 | /* No changeable values for now */ | |
784 | if (pc == 1) | |
785 | goto out; | |
786 | ||
1fd032ee CH |
787 | p[2] = 2; |
788 | /* | |
789 | * From spc4r23, 7.4.7 Control mode page | |
790 | * | |
791 | * The QUEUE ALGORITHM MODIFIER field (see table 368) specifies | |
792 | * restrictions on the algorithm used for reordering commands | |
793 | * having the SIMPLE task attribute (see SAM-4). | |
794 | * | |
795 | * Table 368 -- QUEUE ALGORITHM MODIFIER field | |
796 | * Code Description | |
797 | * 0h Restricted reordering | |
798 | * 1h Unrestricted reordering allowed | |
799 | * 2h to 7h Reserved | |
800 | * 8h to Fh Vendor specific | |
801 | * | |
802 | * A value of zero in the QUEUE ALGORITHM MODIFIER field specifies that | |
803 | * the device server shall order the processing sequence of commands | |
804 | * having the SIMPLE task attribute such that data integrity is maintained | |
805 | * for that I_T nexus (i.e., if the transmission of new SCSI transport protocol | |
806 | * requests is halted at any time, the final value of all data observable | |
807 | * on the medium shall be the same as if all the commands had been processed | |
808 | * with the ORDERED task attribute). | |
809 | * | |
810 | * A value of one in the QUEUE ALGORITHM MODIFIER field specifies that the | |
811 | * device server may reorder the processing sequence of commands having the | |
812 | * SIMPLE task attribute in any manner. Any data integrity exposures related to | |
813 | * command sequence order shall be explicitly handled by the application client | |
814 | * through the selection of appropriate ommands and task attributes. | |
815 | */ | |
0fd97ccf | 816 | p[3] = (dev->dev_attrib.emulate_rest_reord == 1) ? 0x00 : 0x10; |
1fd032ee CH |
817 | /* |
818 | * From spc4r17, section 7.4.6 Control mode Page | |
819 | * | |
820 | * Unit Attention interlocks control (UN_INTLCK_CTRL) to code 00b | |
821 | * | |
822 | * 00b: The logical unit shall clear any unit attention condition | |
823 | * reported in the same I_T_L_Q nexus transaction as a CHECK CONDITION | |
824 | * status and shall not establish a unit attention condition when a com- | |
825 | * mand is completed with BUSY, TASK SET FULL, or RESERVATION CONFLICT | |
826 | * status. | |
827 | * | |
828 | * 10b: The logical unit shall not clear any unit attention condition | |
829 | * reported in the same I_T_L_Q nexus transaction as a CHECK CONDITION | |
830 | * status and shall not establish a unit attention condition when | |
831 | * a command is completed with BUSY, TASK SET FULL, or RESERVATION | |
832 | * CONFLICT status. | |
833 | * | |
834 | * 11b a The logical unit shall not clear any unit attention condition | |
835 | * reported in the same I_T_L_Q nexus transaction as a CHECK CONDITION | |
836 | * status and shall establish a unit attention condition for the | |
837 | * initiator port associated with the I_T nexus on which the BUSY, | |
838 | * TASK SET FULL, or RESERVATION CONFLICT status is being returned. | |
839 | * Depending on the status, the additional sense code shall be set to | |
840 | * PREVIOUS BUSY STATUS, PREVIOUS TASK SET FULL STATUS, or PREVIOUS | |
841 | * RESERVATION CONFLICT STATUS. Until it is cleared by a REQUEST SENSE | |
842 | * command, a unit attention condition shall be established only once | |
843 | * for a BUSY, TASK SET FULL, or RESERVATION CONFLICT status regardless | |
844 | * to the number of commands completed with one of those status codes. | |
845 | */ | |
0fd97ccf CH |
846 | p[4] = (dev->dev_attrib.emulate_ua_intlck_ctrl == 2) ? 0x30 : |
847 | (dev->dev_attrib.emulate_ua_intlck_ctrl == 1) ? 0x20 : 0x00; | |
1fd032ee CH |
848 | /* |
849 | * From spc4r17, section 7.4.6 Control mode Page | |
850 | * | |
851 | * Task Aborted Status (TAS) bit set to zero. | |
852 | * | |
853 | * A task aborted status (TAS) bit set to zero specifies that aborted | |
854 | * tasks shall be terminated by the device server without any response | |
855 | * to the application client. A TAS bit set to one specifies that tasks | |
856 | * aborted by the actions of an I_T nexus other than the I_T nexus on | |
857 | * which the command was received shall be completed with TASK ABORTED | |
858 | * status (see SAM-4). | |
859 | */ | |
0fd97ccf | 860 | p[5] = (dev->dev_attrib.emulate_tas) ? 0x40 : 0x00; |
0c30f421 NB |
861 | /* |
862 | * From spc4r30, section 7.5.7 Control mode page | |
863 | * | |
864 | * Application Tag Owner (ATO) bit set to one. | |
865 | * | |
866 | * If the ATO bit is set to one the device server shall not modify the | |
867 | * LOGICAL BLOCK APPLICATION TAG field and, depending on the protection | |
868 | * type, shall not modify the contents of the LOGICAL BLOCK REFERENCE | |
869 | * TAG field. | |
870 | */ | |
871 | if (dev->dev_attrib.pi_prot_type) | |
872 | p[5] |= 0x80; | |
873 | ||
1fd032ee CH |
874 | p[8] = 0xff; |
875 | p[9] = 0xff; | |
876 | p[11] = 30; | |
877 | ||
d4b2b867 | 878 | out: |
1fd032ee CH |
879 | return 12; |
880 | } | |
881 | ||
d4b2b867 | 882 | static int spc_modesense_caching(struct se_device *dev, u8 pc, u8 *p) |
1fd032ee CH |
883 | { |
884 | p[0] = 0x08; | |
885 | p[1] = 0x12; | |
d4b2b867 RD |
886 | |
887 | /* No changeable values for now */ | |
888 | if (pc == 1) | |
889 | goto out; | |
890 | ||
d0c8b259 | 891 | if (spc_check_dev_wce(dev)) |
1fd032ee CH |
892 | p[2] = 0x04; /* Write Cache Enable */ |
893 | p[12] = 0x20; /* Disabled Read Ahead */ | |
894 | ||
d4b2b867 | 895 | out: |
1fd032ee CH |
896 | return 20; |
897 | } | |
898 | ||
0f6d64ce RD |
899 | static int spc_modesense_informational_exceptions(struct se_device *dev, u8 pc, unsigned char *p) |
900 | { | |
901 | p[0] = 0x1c; | |
902 | p[1] = 0x0a; | |
903 | ||
904 | /* No changeable values for now */ | |
905 | if (pc == 1) | |
906 | goto out; | |
907 | ||
908 | out: | |
909 | return 12; | |
910 | } | |
911 | ||
d4b2b867 RD |
912 | static struct { |
913 | uint8_t page; | |
914 | uint8_t subpage; | |
915 | int (*emulate)(struct se_device *, u8, unsigned char *); | |
916 | } modesense_handlers[] = { | |
917 | { .page = 0x01, .subpage = 0x00, .emulate = spc_modesense_rwrecovery }, | |
918 | { .page = 0x08, .subpage = 0x00, .emulate = spc_modesense_caching }, | |
919 | { .page = 0x0a, .subpage = 0x00, .emulate = spc_modesense_control }, | |
0f6d64ce | 920 | { .page = 0x1c, .subpage = 0x00, .emulate = spc_modesense_informational_exceptions }, |
d4b2b867 RD |
921 | }; |
922 | ||
1fd032ee CH |
923 | static void spc_modesense_write_protect(unsigned char *buf, int type) |
924 | { | |
925 | /* | |
926 | * I believe that the WP bit (bit 7) in the mode header is the same for | |
927 | * all device types.. | |
928 | */ | |
929 | switch (type) { | |
930 | case TYPE_DISK: | |
931 | case TYPE_TAPE: | |
932 | default: | |
933 | buf[0] |= 0x80; /* WP bit */ | |
934 | break; | |
935 | } | |
936 | } | |
937 | ||
938 | static void spc_modesense_dpofua(unsigned char *buf, int type) | |
939 | { | |
940 | switch (type) { | |
941 | case TYPE_DISK: | |
942 | buf[0] |= 0x10; /* DPOFUA bit */ | |
943 | break; | |
944 | default: | |
945 | break; | |
946 | } | |
947 | } | |
948 | ||
d4b2b867 RD |
949 | static int spc_modesense_blockdesc(unsigned char *buf, u64 blocks, u32 block_size) |
950 | { | |
951 | *buf++ = 8; | |
952 | put_unaligned_be32(min(blocks, 0xffffffffull), buf); | |
953 | buf += 4; | |
954 | put_unaligned_be32(block_size, buf); | |
955 | return 9; | |
956 | } | |
957 | ||
958 | static int spc_modesense_long_blockdesc(unsigned char *buf, u64 blocks, u32 block_size) | |
959 | { | |
960 | if (blocks <= 0xffffffff) | |
961 | return spc_modesense_blockdesc(buf + 3, blocks, block_size) + 3; | |
962 | ||
963 | *buf++ = 1; /* LONGLBA */ | |
964 | buf += 2; | |
965 | *buf++ = 16; | |
966 | put_unaligned_be64(blocks, buf); | |
967 | buf += 12; | |
968 | put_unaligned_be32(block_size, buf); | |
969 | ||
970 | return 17; | |
971 | } | |
972 | ||
de103c93 | 973 | static sense_reason_t spc_emulate_modesense(struct se_cmd *cmd) |
1fd032ee CH |
974 | { |
975 | struct se_device *dev = cmd->se_dev; | |
976 | char *cdb = cmd->t_task_cdb; | |
cab9609b | 977 | unsigned char buf[SE_MODE_PAGE_BUF], *rbuf; |
1fd032ee CH |
978 | int type = dev->transport->get_device_type(dev); |
979 | int ten = (cmd->t_task_cdb[0] == MODE_SENSE_10); | |
d4b2b867 RD |
980 | bool dbd = !!(cdb[1] & 0x08); |
981 | bool llba = ten ? !!(cdb[1] & 0x10) : false; | |
982 | u8 pc = cdb[2] >> 6; | |
983 | u8 page = cdb[2] & 0x3f; | |
984 | u8 subpage = cdb[3]; | |
1fd032ee | 985 | int length = 0; |
d4b2b867 RD |
986 | int ret; |
987 | int i; | |
1fd032ee | 988 | |
cab9609b NB |
989 | memset(buf, 0, SE_MODE_PAGE_BUF); |
990 | ||
fecae40a NB |
991 | /* |
992 | * Skip over MODE DATA LENGTH + MEDIUM TYPE fields to byte 3 for | |
993 | * MODE_SENSE_10 and byte 2 for MODE_SENSE (6). | |
994 | */ | |
995 | length = ten ? 3 : 2; | |
d4b2b867 RD |
996 | |
997 | /* DEVICE-SPECIFIC PARAMETER */ | |
998 | if ((cmd->se_lun->lun_access & TRANSPORT_LUNFLAGS_READ_ONLY) || | |
999 | (cmd->se_deve && | |
1000 | (cmd->se_deve->lun_flags & TRANSPORT_LUNFLAGS_READ_ONLY))) | |
1001 | spc_modesense_write_protect(&buf[length], type); | |
1002 | ||
d0c8b259 | 1003 | if ((spc_check_dev_wce(dev)) && |
d4b2b867 RD |
1004 | (dev->dev_attrib.emulate_fua_write > 0)) |
1005 | spc_modesense_dpofua(&buf[length], type); | |
1006 | ||
1007 | ++length; | |
1008 | ||
1009 | /* BLOCK DESCRIPTOR */ | |
1010 | ||
1011 | /* | |
1012 | * For now we only include a block descriptor for disk (SBC) | |
1013 | * devices; other command sets use a slightly different format. | |
1014 | */ | |
1015 | if (!dbd && type == TYPE_DISK) { | |
1016 | u64 blocks = dev->transport->get_blocks(dev); | |
1017 | u32 block_size = dev->dev_attrib.block_size; | |
1018 | ||
1019 | if (ten) { | |
1020 | if (llba) { | |
1021 | length += spc_modesense_long_blockdesc(&buf[length], | |
1022 | blocks, block_size); | |
1023 | } else { | |
1024 | length += 3; | |
1025 | length += spc_modesense_blockdesc(&buf[length], | |
1026 | blocks, block_size); | |
1027 | } | |
1028 | } else { | |
1029 | length += spc_modesense_blockdesc(&buf[length], blocks, | |
1030 | block_size); | |
1031 | } | |
1fd032ee | 1032 | } else { |
d4b2b867 RD |
1033 | if (ten) |
1034 | length += 4; | |
1035 | else | |
1036 | length += 1; | |
1fd032ee CH |
1037 | } |
1038 | ||
d4b2b867 RD |
1039 | if (page == 0x3f) { |
1040 | if (subpage != 0x00 && subpage != 0xff) { | |
de103c93 | 1041 | pr_warn("MODE_SENSE: Invalid subpage code: 0x%02x\n", subpage); |
de103c93 | 1042 | return TCM_INVALID_CDB_FIELD; |
d4b2b867 RD |
1043 | } |
1044 | ||
1045 | for (i = 0; i < ARRAY_SIZE(modesense_handlers); ++i) { | |
1046 | /* | |
1047 | * Tricky way to say all subpage 00h for | |
1048 | * subpage==0, all subpages for subpage==0xff | |
1049 | * (and we just checked above that those are | |
1050 | * the only two possibilities). | |
1051 | */ | |
1052 | if ((modesense_handlers[i].subpage & ~subpage) == 0) { | |
1053 | ret = modesense_handlers[i].emulate(dev, pc, &buf[length]); | |
1054 | if (!ten && length + ret >= 255) | |
1055 | break; | |
1056 | length += ret; | |
1057 | } | |
1058 | } | |
1059 | ||
1060 | goto set_length; | |
1061 | } | |
1062 | ||
1063 | for (i = 0; i < ARRAY_SIZE(modesense_handlers); ++i) | |
1064 | if (modesense_handlers[i].page == page && | |
1065 | modesense_handlers[i].subpage == subpage) { | |
1066 | length += modesense_handlers[i].emulate(dev, pc, &buf[length]); | |
1067 | goto set_length; | |
1068 | } | |
1069 | ||
1070 | /* | |
1071 | * We don't intend to implement: | |
1072 | * - obsolete page 03h "format parameters" (checked by Solaris) | |
1073 | */ | |
1074 | if (page != 0x03) | |
1075 | pr_err("MODE SENSE: unimplemented page/subpage: 0x%02x/0x%02x\n", | |
1076 | page, subpage); | |
1077 | ||
de103c93 | 1078 | return TCM_UNKNOWN_MODE_PAGE; |
d4b2b867 RD |
1079 | |
1080 | set_length: | |
1081 | if (ten) | |
1082 | put_unaligned_be16(length - 2, buf); | |
1083 | else | |
1084 | buf[0] = length - 1; | |
1085 | ||
cab9609b NB |
1086 | rbuf = transport_kmap_data_sg(cmd); |
1087 | if (rbuf) { | |
1088 | memcpy(rbuf, buf, min_t(u32, SE_MODE_PAGE_BUF, cmd->data_length)); | |
1089 | transport_kunmap_data_sg(cmd); | |
7a3f369c | 1090 | } |
1fd032ee CH |
1091 | |
1092 | target_complete_cmd(cmd, GOOD); | |
1093 | return 0; | |
1094 | } | |
1095 | ||
de103c93 | 1096 | static sense_reason_t spc_emulate_modeselect(struct se_cmd *cmd) |
3a3c5e4a RD |
1097 | { |
1098 | struct se_device *dev = cmd->se_dev; | |
1099 | char *cdb = cmd->t_task_cdb; | |
1100 | bool ten = cdb[0] == MODE_SELECT_10; | |
1101 | int off = ten ? 8 : 4; | |
1102 | bool pf = !!(cdb[1] & 0x10); | |
1103 | u8 page, subpage; | |
1104 | unsigned char *buf; | |
1105 | unsigned char tbuf[SE_MODE_PAGE_BUF]; | |
1106 | int length; | |
1107 | int ret = 0; | |
1108 | int i; | |
1109 | ||
71f41fe1 RD |
1110 | if (!cmd->data_length) { |
1111 | target_complete_cmd(cmd, GOOD); | |
1112 | return 0; | |
1113 | } | |
1114 | ||
1115 | if (cmd->data_length < off + 2) | |
1116 | return TCM_PARAMETER_LIST_LENGTH_ERROR; | |
1117 | ||
3a3c5e4a | 1118 | buf = transport_kmap_data_sg(cmd); |
de103c93 CH |
1119 | if (!buf) |
1120 | return TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; | |
3a3c5e4a RD |
1121 | |
1122 | if (!pf) { | |
de103c93 | 1123 | ret = TCM_INVALID_CDB_FIELD; |
3a3c5e4a RD |
1124 | goto out; |
1125 | } | |
1126 | ||
1127 | page = buf[off] & 0x3f; | |
1128 | subpage = buf[off] & 0x40 ? buf[off + 1] : 0; | |
1129 | ||
1130 | for (i = 0; i < ARRAY_SIZE(modesense_handlers); ++i) | |
1131 | if (modesense_handlers[i].page == page && | |
1132 | modesense_handlers[i].subpage == subpage) { | |
1133 | memset(tbuf, 0, SE_MODE_PAGE_BUF); | |
1134 | length = modesense_handlers[i].emulate(dev, 0, tbuf); | |
1135 | goto check_contents; | |
1136 | } | |
1137 | ||
de103c93 | 1138 | ret = TCM_UNKNOWN_MODE_PAGE; |
3a3c5e4a RD |
1139 | goto out; |
1140 | ||
1141 | check_contents: | |
71f41fe1 RD |
1142 | if (cmd->data_length < off + length) { |
1143 | ret = TCM_PARAMETER_LIST_LENGTH_ERROR; | |
1144 | goto out; | |
1145 | } | |
1146 | ||
de103c93 CH |
1147 | if (memcmp(buf + off, tbuf, length)) |
1148 | ret = TCM_INVALID_PARAMETER_LIST; | |
3a3c5e4a RD |
1149 | |
1150 | out: | |
1151 | transport_kunmap_data_sg(cmd); | |
1152 | ||
1153 | if (!ret) | |
1154 | target_complete_cmd(cmd, GOOD); | |
1155 | return ret; | |
1156 | } | |
1157 | ||
de103c93 | 1158 | static sense_reason_t spc_emulate_request_sense(struct se_cmd *cmd) |
1fd032ee CH |
1159 | { |
1160 | unsigned char *cdb = cmd->t_task_cdb; | |
32a8811f | 1161 | unsigned char *rbuf; |
1fd032ee | 1162 | u8 ua_asc = 0, ua_ascq = 0; |
32a8811f PB |
1163 | unsigned char buf[SE_SENSE_BUF]; |
1164 | ||
1165 | memset(buf, 0, SE_SENSE_BUF); | |
1fd032ee CH |
1166 | |
1167 | if (cdb[1] & 0x01) { | |
1168 | pr_err("REQUEST_SENSE description emulation not" | |
1169 | " supported\n"); | |
de103c93 | 1170 | return TCM_INVALID_CDB_FIELD; |
1fd032ee CH |
1171 | } |
1172 | ||
32a8811f | 1173 | rbuf = transport_kmap_data_sg(cmd); |
de103c93 CH |
1174 | if (!rbuf) |
1175 | return TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; | |
1176 | ||
1177 | if (!core_scsi3_ua_clear_for_request_sense(cmd, &ua_asc, &ua_ascq)) { | |
1fd032ee CH |
1178 | /* |
1179 | * CURRENT ERROR, UNIT ATTENTION | |
1180 | */ | |
1181 | buf[0] = 0x70; | |
1182 | buf[SPC_SENSE_KEY_OFFSET] = UNIT_ATTENTION; | |
1183 | ||
1fd032ee CH |
1184 | /* |
1185 | * The Additional Sense Code (ASC) from the UNIT ATTENTION | |
1186 | */ | |
1187 | buf[SPC_ASC_KEY_OFFSET] = ua_asc; | |
1188 | buf[SPC_ASCQ_KEY_OFFSET] = ua_ascq; | |
1189 | buf[7] = 0x0A; | |
1190 | } else { | |
1191 | /* | |
1192 | * CURRENT ERROR, NO SENSE | |
1193 | */ | |
1194 | buf[0] = 0x70; | |
1195 | buf[SPC_SENSE_KEY_OFFSET] = NO_SENSE; | |
1196 | ||
1fd032ee CH |
1197 | /* |
1198 | * NO ADDITIONAL SENSE INFORMATION | |
1199 | */ | |
1200 | buf[SPC_ASC_KEY_OFFSET] = 0x00; | |
1201 | buf[7] = 0x0A; | |
1202 | } | |
1203 | ||
de103c93 CH |
1204 | memcpy(rbuf, buf, min_t(u32, sizeof(buf), cmd->data_length)); |
1205 | transport_kunmap_data_sg(cmd); | |
32a8811f | 1206 | |
1fd032ee CH |
1207 | target_complete_cmd(cmd, GOOD); |
1208 | return 0; | |
1209 | } | |
1210 | ||
de103c93 | 1211 | sense_reason_t spc_emulate_report_luns(struct se_cmd *cmd) |
d1b1f805 CH |
1212 | { |
1213 | struct se_dev_entry *deve; | |
1214 | struct se_session *sess = cmd->se_sess; | |
1215 | unsigned char *buf; | |
1216 | u32 lun_count = 0, offset = 8, i; | |
1217 | ||
1218 | if (cmd->data_length < 16) { | |
1219 | pr_warn("REPORT LUNS allocation length %u too small\n", | |
1220 | cmd->data_length); | |
de103c93 | 1221 | return TCM_INVALID_CDB_FIELD; |
d1b1f805 CH |
1222 | } |
1223 | ||
1224 | buf = transport_kmap_data_sg(cmd); | |
1225 | if (!buf) | |
de103c93 | 1226 | return TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; |
d1b1f805 CH |
1227 | |
1228 | /* | |
1229 | * If no struct se_session pointer is present, this struct se_cmd is | |
1230 | * coming via a target_core_mod PASSTHROUGH op, and not through | |
1231 | * a $FABRIC_MOD. In that case, report LUN=0 only. | |
1232 | */ | |
1233 | if (!sess) { | |
1234 | int_to_scsilun(0, (struct scsi_lun *)&buf[offset]); | |
1235 | lun_count = 1; | |
1236 | goto done; | |
1237 | } | |
1238 | ||
1239 | spin_lock_irq(&sess->se_node_acl->device_list_lock); | |
1240 | for (i = 0; i < TRANSPORT_MAX_LUNS_PER_TPG; i++) { | |
1241 | deve = sess->se_node_acl->device_list[i]; | |
1242 | if (!(deve->lun_flags & TRANSPORT_LUNFLAGS_INITIATOR_ACCESS)) | |
1243 | continue; | |
1244 | /* | |
1245 | * We determine the correct LUN LIST LENGTH even once we | |
1246 | * have reached the initial allocation length. | |
1247 | * See SPC2-R20 7.19. | |
1248 | */ | |
1249 | lun_count++; | |
1250 | if ((offset + 8) > cmd->data_length) | |
1251 | continue; | |
1252 | ||
1253 | int_to_scsilun(deve->mapped_lun, (struct scsi_lun *)&buf[offset]); | |
1254 | offset += 8; | |
1255 | } | |
1256 | spin_unlock_irq(&sess->se_node_acl->device_list_lock); | |
1257 | ||
1258 | /* | |
1259 | * See SPC3 r07, page 159. | |
1260 | */ | |
1261 | done: | |
1262 | lun_count *= 8; | |
1263 | buf[0] = ((lun_count >> 24) & 0xff); | |
1264 | buf[1] = ((lun_count >> 16) & 0xff); | |
1265 | buf[2] = ((lun_count >> 8) & 0xff); | |
1266 | buf[3] = (lun_count & 0xff); | |
1267 | transport_kunmap_data_sg(cmd); | |
1268 | ||
1269 | target_complete_cmd(cmd, GOOD); | |
1270 | return 0; | |
1271 | } | |
8de530a5 | 1272 | EXPORT_SYMBOL(spc_emulate_report_luns); |
d1b1f805 | 1273 | |
de103c93 CH |
1274 | static sense_reason_t |
1275 | spc_emulate_testunitready(struct se_cmd *cmd) | |
1fd032ee CH |
1276 | { |
1277 | target_complete_cmd(cmd, GOOD); | |
1278 | return 0; | |
1279 | } | |
1280 | ||
de103c93 CH |
1281 | sense_reason_t |
1282 | spc_parse_cdb(struct se_cmd *cmd, unsigned int *size) | |
88455ec4 | 1283 | { |
eba2ca45 | 1284 | struct se_device *dev = cmd->se_dev; |
88455ec4 CH |
1285 | unsigned char *cdb = cmd->t_task_cdb; |
1286 | ||
1287 | switch (cdb[0]) { | |
1288 | case MODE_SELECT: | |
1289 | *size = cdb[4]; | |
3a3c5e4a | 1290 | cmd->execute_cmd = spc_emulate_modeselect; |
88455ec4 CH |
1291 | break; |
1292 | case MODE_SELECT_10: | |
1293 | *size = (cdb[7] << 8) + cdb[8]; | |
3a3c5e4a | 1294 | cmd->execute_cmd = spc_emulate_modeselect; |
88455ec4 CH |
1295 | break; |
1296 | case MODE_SENSE: | |
1297 | *size = cdb[4]; | |
1fd032ee | 1298 | cmd->execute_cmd = spc_emulate_modesense; |
88455ec4 CH |
1299 | break; |
1300 | case MODE_SENSE_10: | |
1301 | *size = (cdb[7] << 8) + cdb[8]; | |
1fd032ee | 1302 | cmd->execute_cmd = spc_emulate_modesense; |
88455ec4 CH |
1303 | break; |
1304 | case LOG_SELECT: | |
1305 | case LOG_SENSE: | |
1306 | *size = (cdb[7] << 8) + cdb[8]; | |
1307 | break; | |
1308 | case PERSISTENT_RESERVE_IN: | |
88455ec4 | 1309 | *size = (cdb[7] << 8) + cdb[8]; |
d977f437 | 1310 | cmd->execute_cmd = target_scsi3_emulate_pr_in; |
88455ec4 CH |
1311 | break; |
1312 | case PERSISTENT_RESERVE_OUT: | |
88455ec4 | 1313 | *size = (cdb[7] << 8) + cdb[8]; |
d977f437 | 1314 | cmd->execute_cmd = target_scsi3_emulate_pr_out; |
88455ec4 CH |
1315 | break; |
1316 | case RELEASE: | |
1317 | case RELEASE_10: | |
1318 | if (cdb[0] == RELEASE_10) | |
1319 | *size = (cdb[7] << 8) | cdb[8]; | |
1320 | else | |
1321 | *size = cmd->data_length; | |
1322 | ||
d977f437 | 1323 | cmd->execute_cmd = target_scsi2_reservation_release; |
88455ec4 CH |
1324 | break; |
1325 | case RESERVE: | |
1326 | case RESERVE_10: | |
1327 | /* | |
1328 | * The SPC-2 RESERVE does not contain a size in the SCSI CDB. | |
1329 | * Assume the passthrough or $FABRIC_MOD will tell us about it. | |
1330 | */ | |
1331 | if (cdb[0] == RESERVE_10) | |
1332 | *size = (cdb[7] << 8) | cdb[8]; | |
1333 | else | |
1334 | *size = cmd->data_length; | |
1335 | ||
d977f437 | 1336 | cmd->execute_cmd = target_scsi2_reservation_reserve; |
88455ec4 CH |
1337 | break; |
1338 | case REQUEST_SENSE: | |
1339 | *size = cdb[4]; | |
1fd032ee | 1340 | cmd->execute_cmd = spc_emulate_request_sense; |
88455ec4 CH |
1341 | break; |
1342 | case INQUIRY: | |
1343 | *size = (cdb[3] << 8) + cdb[4]; | |
1344 | ||
1345 | /* | |
125d0119 | 1346 | * Do implicit HEAD_OF_QUEUE processing for INQUIRY. |
88455ec4 CH |
1347 | * See spc4r17 section 5.3 |
1348 | */ | |
019c4ca6 | 1349 | cmd->sam_task_attr = MSG_HEAD_TAG; |
1fd032ee | 1350 | cmd->execute_cmd = spc_emulate_inquiry; |
88455ec4 CH |
1351 | break; |
1352 | case SECURITY_PROTOCOL_IN: | |
1353 | case SECURITY_PROTOCOL_OUT: | |
1354 | *size = (cdb[6] << 24) | (cdb[7] << 16) | (cdb[8] << 8) | cdb[9]; | |
1355 | break; | |
1356 | case EXTENDED_COPY: | |
04b1b795 NB |
1357 | *size = get_unaligned_be32(&cdb[10]); |
1358 | cmd->execute_cmd = target_do_xcopy; | |
1359 | break; | |
88455ec4 | 1360 | case RECEIVE_COPY_RESULTS: |
04b1b795 NB |
1361 | *size = get_unaligned_be32(&cdb[10]); |
1362 | cmd->execute_cmd = target_do_receive_copy_results; | |
1363 | break; | |
1364 | case READ_ATTRIBUTE: | |
88455ec4 CH |
1365 | case WRITE_ATTRIBUTE: |
1366 | *size = (cdb[10] << 24) | (cdb[11] << 16) | | |
1367 | (cdb[12] << 8) | cdb[13]; | |
1368 | break; | |
1369 | case RECEIVE_DIAGNOSTIC: | |
1370 | case SEND_DIAGNOSTIC: | |
1371 | *size = (cdb[3] << 8) | cdb[4]; | |
1372 | break; | |
1373 | case WRITE_BUFFER: | |
1374 | *size = (cdb[6] << 16) + (cdb[7] << 8) + cdb[8]; | |
1375 | break; | |
1376 | case REPORT_LUNS: | |
d1b1f805 | 1377 | cmd->execute_cmd = spc_emulate_report_luns; |
88455ec4 CH |
1378 | *size = (cdb[6] << 24) | (cdb[7] << 16) | (cdb[8] << 8) | cdb[9]; |
1379 | /* | |
125d0119 | 1380 | * Do implicit HEAD_OF_QUEUE processing for REPORT_LUNS |
88455ec4 CH |
1381 | * See spc4r17 section 5.3 |
1382 | */ | |
019c4ca6 | 1383 | cmd->sam_task_attr = MSG_HEAD_TAG; |
88455ec4 CH |
1384 | break; |
1385 | case TEST_UNIT_READY: | |
1fd032ee | 1386 | cmd->execute_cmd = spc_emulate_testunitready; |
d6e0175c | 1387 | *size = 0; |
88455ec4 | 1388 | break; |
eba2ca45 NB |
1389 | case MAINTENANCE_IN: |
1390 | if (dev->transport->get_device_type(dev) != TYPE_ROM) { | |
1391 | /* | |
1392 | * MAINTENANCE_IN from SCC-2 | |
1393 | * Check for emulated MI_REPORT_TARGET_PGS | |
1394 | */ | |
c87fbd56 | 1395 | if ((cdb[1] & 0x1f) == MI_REPORT_TARGET_PGS) { |
eba2ca45 NB |
1396 | cmd->execute_cmd = |
1397 | target_emulate_report_target_port_groups; | |
1398 | } | |
1399 | *size = get_unaligned_be32(&cdb[6]); | |
1400 | } else { | |
1401 | /* | |
1402 | * GPCMD_SEND_KEY from multi media commands | |
1403 | */ | |
1404 | *size = get_unaligned_be16(&cdb[8]); | |
1405 | } | |
1406 | break; | |
1407 | case MAINTENANCE_OUT: | |
1408 | if (dev->transport->get_device_type(dev) != TYPE_ROM) { | |
1409 | /* | |
1410 | * MAINTENANCE_OUT from SCC-2 | |
1411 | * Check for emulated MO_SET_TARGET_PGS. | |
1412 | */ | |
c87fbd56 | 1413 | if (cdb[1] == MO_SET_TARGET_PGS) { |
eba2ca45 NB |
1414 | cmd->execute_cmd = |
1415 | target_emulate_set_target_port_groups; | |
1416 | } | |
1417 | *size = get_unaligned_be32(&cdb[6]); | |
1418 | } else { | |
1419 | /* | |
1420 | * GPCMD_SEND_KEY from multi media commands | |
1421 | */ | |
1422 | *size = get_unaligned_be16(&cdb[8]); | |
1423 | } | |
1424 | break; | |
88455ec4 CH |
1425 | default: |
1426 | pr_warn("TARGET_CORE[%s]: Unsupported SCSI Opcode" | |
1427 | " 0x%02x, sending CHECK_CONDITION.\n", | |
1428 | cmd->se_tfo->get_fabric_name(), cdb[0]); | |
de103c93 | 1429 | return TCM_UNSUPPORTED_SCSI_OPCODE; |
88455ec4 CH |
1430 | } |
1431 | ||
1432 | return 0; | |
1433 | } | |
1434 | EXPORT_SYMBOL(spc_parse_cdb); |