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