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 | ||
ba929992 BVA |
27 | #include <scsi/scsi_proto.h> |
28 | #include <scsi/scsi_common.h> | |
88455ec4 CH |
29 | #include <scsi/scsi_tcq.h> |
30 | ||
31 | #include <target/target_core_base.h> | |
32 | #include <target/target_core_backend.h> | |
33 | #include <target/target_core_fabric.h> | |
34 | ||
35 | #include "target_core_internal.h" | |
eba2ca45 | 36 | #include "target_core_alua.h" |
88455ec4 CH |
37 | #include "target_core_pr.h" |
38 | #include "target_core_ua.h" | |
04b1b795 | 39 | #include "target_core_xcopy.h" |
88455ec4 | 40 | |
adf653f9 | 41 | static void spc_fill_alua_data(struct se_lun *lun, unsigned char *buf) |
1fd032ee CH |
42 | { |
43 | struct t10_alua_tg_pt_gp *tg_pt_gp; | |
1fd032ee CH |
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 | */ | |
adf653f9 CH |
56 | spin_lock(&lun->lun_tg_pt_gp_lock); |
57 | tg_pt_gp = lun->lun_tg_pt_gp; | |
1fd032ee CH |
58 | if (tg_pt_gp) |
59 | buf[5] |= tg_pt_gp->tg_pt_gp_alua_access_type; | |
adf653f9 | 60 | spin_unlock(&lun->lun_tg_pt_gp_lock); |
1fd032ee CH |
61 | } |
62 | ||
0dfa1c5d HR |
63 | sense_reason_t |
64 | spc_emulate_inquiry_std(struct se_cmd *cmd, unsigned char *buf) | |
1fd032ee CH |
65 | { |
66 | struct se_lun *lun = cmd->se_lun; | |
67 | struct se_device *dev = cmd->se_dev; | |
d2c5304c | 68 | struct se_session *sess = cmd->se_sess; |
1fd032ee CH |
69 | |
70 | /* Set RMB (removable media) for tape devices */ | |
71 | if (dev->transport->get_device_type(dev) == TYPE_TAPE) | |
72 | buf[1] = 0x80; | |
73 | ||
48c2567d | 74 | buf[2] = 0x05; /* SPC-3 */ |
1fd032ee CH |
75 | |
76 | /* | |
77 | * NORMACA and HISUP = 0, RESPONSE DATA FORMAT = 2 | |
78 | * | |
79 | * SPC4 says: | |
80 | * A RESPONSE DATA FORMAT field set to 2h indicates that the | |
81 | * standard INQUIRY data is in the format defined in this | |
82 | * standard. Response data format values less than 2h are | |
83 | * obsolete. Response data format values greater than 2h are | |
84 | * reserved. | |
85 | */ | |
86 | buf[3] = 2; | |
87 | ||
88 | /* | |
89 | * Enable SCCS and TPGS fields for Emulated ALUA | |
90 | */ | |
adf653f9 | 91 | spc_fill_alua_data(lun, buf); |
1fd032ee | 92 | |
d397a445 NB |
93 | /* |
94 | * Set Third-Party Copy (3PC) bit to indicate support for EXTENDED_COPY | |
95 | */ | |
96 | if (dev->dev_attrib.emulate_3pc) | |
97 | buf[5] |= 0x8; | |
bdbad2bd | 98 | /* |
d2c5304c | 99 | * Set Protection (PROTECT) bit when DIF has been enabled on the |
9ef5466e NB |
100 | * device, and the fabric supports VERIFY + PASS. Also report |
101 | * PROTECT=1 if sess_prot_type has been configured to allow T10-PI | |
102 | * to unprotected devices. | |
bdbad2bd | 103 | */ |
d2c5304c | 104 | if (sess->sup_prot_ops & (TARGET_PROT_DIN_PASS | TARGET_PROT_DOUT_PASS)) { |
9ef5466e | 105 | if (dev->dev_attrib.pi_prot_type || cmd->se_sess->sess_prot_type) |
d2c5304c NB |
106 | buf[5] |= 0x1; |
107 | } | |
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; | |
9aff64e1 | 128 | u16 len; |
1fd032ee | 129 | |
0fd97ccf | 130 | if (dev->dev_flags & DF_EMULATED_VPD_UNIT_SERIAL) { |
9aff64e1 | 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; | |
1fd032ee CH |
178 | struct se_portal_group *tpg = NULL; |
179 | struct t10_alua_lu_gp_member *lu_gp_mem; | |
180 | struct t10_alua_tg_pt_gp *tg_pt_gp; | |
0fd97ccf | 181 | unsigned char *prod = &dev->t10_wwn.model[0]; |
1fd032ee CH |
182 | u32 prod_len; |
183 | u32 unit_serial_len, off = 0; | |
184 | u16 len = 0, id_len; | |
185 | ||
186 | off = 4; | |
187 | ||
188 | /* | |
189 | * NAA IEEE Registered Extended Assigned designator format, see | |
190 | * spc4r17 section 7.7.3.6.5 | |
191 | * | |
192 | * We depend upon a target_core_mod/ConfigFS provided | |
193 | * /sys/kernel/config/target/core/$HBA/$DEV/wwn/vpd_unit_serial | |
194 | * value in order to return the NAA id. | |
195 | */ | |
0fd97ccf | 196 | if (!(dev->dev_flags & DF_EMULATED_VPD_UNIT_SERIAL)) |
1fd032ee CH |
197 | goto check_t10_vend_desc; |
198 | ||
199 | /* CODE SET == Binary */ | |
200 | buf[off++] = 0x1; | |
201 | ||
202 | /* Set ASSOCIATION == addressed logical unit: 0)b */ | |
203 | buf[off] = 0x00; | |
204 | ||
205 | /* Identifier/Designator type == NAA identifier */ | |
206 | buf[off++] |= 0x3; | |
207 | off++; | |
208 | ||
209 | /* Identifier/Designator length */ | |
210 | buf[off++] = 0x10; | |
211 | ||
212 | /* | |
213 | * Start NAA IEEE Registered Extended Identifier/Designator | |
214 | */ | |
215 | buf[off++] = (0x6 << 4); | |
216 | ||
217 | /* | |
218 | * Use OpenFabrics IEEE Company ID: 00 14 05 | |
219 | */ | |
220 | buf[off++] = 0x01; | |
221 | buf[off++] = 0x40; | |
222 | buf[off] = (0x5 << 4); | |
223 | ||
224 | /* | |
225 | * Return ConfigFS Unit Serial Number information for | |
226 | * VENDOR_SPECIFIC_IDENTIFIER and | |
227 | * VENDOR_SPECIFIC_IDENTIFIER_EXTENTION | |
228 | */ | |
229 | spc_parse_naa_6h_vendor_specific(dev, &buf[off]); | |
230 | ||
231 | len = 20; | |
232 | off = (len + 4); | |
233 | ||
234 | check_t10_vend_desc: | |
235 | /* | |
236 | * T10 Vendor Identifier Page, see spc4r17 section 7.7.3.4 | |
237 | */ | |
238 | id_len = 8; /* For Vendor field */ | |
239 | prod_len = 4; /* For VPD Header */ | |
240 | prod_len += 8; /* For Vendor field */ | |
241 | prod_len += strlen(prod); | |
242 | prod_len++; /* For : */ | |
243 | ||
0fd97ccf CH |
244 | if (dev->dev_flags & DF_EMULATED_VPD_UNIT_SERIAL) { |
245 | unit_serial_len = strlen(&dev->t10_wwn.unit_serial[0]); | |
1fd032ee CH |
246 | unit_serial_len++; /* For NULL Terminator */ |
247 | ||
248 | id_len += sprintf(&buf[off+12], "%s:%s", prod, | |
0fd97ccf | 249 | &dev->t10_wwn.unit_serial[0]); |
1fd032ee CH |
250 | } |
251 | buf[off] = 0x2; /* ASCII */ | |
252 | buf[off+1] = 0x1; /* T10 Vendor ID */ | |
253 | buf[off+2] = 0x0; | |
254 | memcpy(&buf[off+4], "LIO-ORG", 8); | |
255 | /* Extra Byte for NULL Terminator */ | |
256 | id_len++; | |
257 | /* Identifier Length */ | |
258 | buf[off+3] = id_len; | |
259 | /* Header size for Designation descriptor */ | |
260 | len += (id_len + 4); | |
261 | off += (id_len + 4); | |
adf653f9 CH |
262 | |
263 | if (1) { | |
1fd032ee | 264 | struct t10_alua_lu_gp *lu_gp; |
fbfe858f | 265 | u32 padding, scsi_name_len, scsi_target_len; |
1fd032ee CH |
266 | u16 lu_gp_id = 0; |
267 | u16 tg_pt_gp_id = 0; | |
268 | u16 tpgt; | |
269 | ||
adf653f9 | 270 | tpg = lun->lun_tpg; |
1fd032ee CH |
271 | /* |
272 | * Relative target port identifer, see spc4r17 | |
273 | * section 7.7.3.7 | |
274 | * | |
275 | * Get the PROTOCOL IDENTIFIER as defined by spc4r17 | |
276 | * section 7.5.1 Table 362 | |
277 | */ | |
2aeeafae | 278 | buf[off] = tpg->proto_id << 4; |
1fd032ee CH |
279 | buf[off++] |= 0x1; /* CODE SET == Binary */ |
280 | buf[off] = 0x80; /* Set PIV=1 */ | |
281 | /* Set ASSOCIATION == target port: 01b */ | |
282 | buf[off] |= 0x10; | |
283 | /* DESIGNATOR TYPE == Relative target port identifer */ | |
284 | buf[off++] |= 0x4; | |
285 | off++; /* Skip over Reserved */ | |
286 | buf[off++] = 4; /* DESIGNATOR LENGTH */ | |
287 | /* Skip over Obsolete field in RTPI payload | |
288 | * in Table 472 */ | |
289 | off += 2; | |
adf653f9 CH |
290 | buf[off++] = ((lun->lun_rtpi >> 8) & 0xff); |
291 | buf[off++] = (lun->lun_rtpi & 0xff); | |
1fd032ee CH |
292 | len += 8; /* Header size + Designation descriptor */ |
293 | /* | |
294 | * Target port group identifier, see spc4r17 | |
295 | * section 7.7.3.8 | |
296 | * | |
297 | * Get the PROTOCOL IDENTIFIER as defined by spc4r17 | |
298 | * section 7.5.1 Table 362 | |
299 | */ | |
adf653f9 CH |
300 | spin_lock(&lun->lun_tg_pt_gp_lock); |
301 | tg_pt_gp = lun->lun_tg_pt_gp; | |
1fd032ee | 302 | if (!tg_pt_gp) { |
adf653f9 | 303 | spin_unlock(&lun->lun_tg_pt_gp_lock); |
1fd032ee CH |
304 | goto check_lu_gp; |
305 | } | |
306 | tg_pt_gp_id = tg_pt_gp->tg_pt_gp_id; | |
adf653f9 | 307 | spin_unlock(&lun->lun_tg_pt_gp_lock); |
1fd032ee | 308 | |
2aeeafae | 309 | buf[off] = tpg->proto_id << 4; |
1fd032ee CH |
310 | buf[off++] |= 0x1; /* CODE SET == Binary */ |
311 | buf[off] = 0x80; /* Set PIV=1 */ | |
312 | /* Set ASSOCIATION == target port: 01b */ | |
313 | buf[off] |= 0x10; | |
314 | /* DESIGNATOR TYPE == Target port group identifier */ | |
315 | buf[off++] |= 0x5; | |
316 | off++; /* Skip over Reserved */ | |
317 | buf[off++] = 4; /* DESIGNATOR LENGTH */ | |
318 | off += 2; /* Skip over Reserved Field */ | |
319 | buf[off++] = ((tg_pt_gp_id >> 8) & 0xff); | |
320 | buf[off++] = (tg_pt_gp_id & 0xff); | |
321 | len += 8; /* Header size + Designation descriptor */ | |
322 | /* | |
323 | * Logical Unit Group identifier, see spc4r17 | |
324 | * section 7.7.3.8 | |
325 | */ | |
326 | check_lu_gp: | |
327 | lu_gp_mem = dev->dev_alua_lu_gp_mem; | |
328 | if (!lu_gp_mem) | |
329 | goto check_scsi_name; | |
330 | ||
331 | spin_lock(&lu_gp_mem->lu_gp_mem_lock); | |
332 | lu_gp = lu_gp_mem->lu_gp; | |
333 | if (!lu_gp) { | |
334 | spin_unlock(&lu_gp_mem->lu_gp_mem_lock); | |
335 | goto check_scsi_name; | |
336 | } | |
337 | lu_gp_id = lu_gp->lu_gp_id; | |
338 | spin_unlock(&lu_gp_mem->lu_gp_mem_lock); | |
339 | ||
340 | buf[off++] |= 0x1; /* CODE SET == Binary */ | |
341 | /* DESIGNATOR TYPE == Logical Unit Group identifier */ | |
342 | buf[off++] |= 0x6; | |
343 | off++; /* Skip over Reserved */ | |
344 | buf[off++] = 4; /* DESIGNATOR LENGTH */ | |
345 | off += 2; /* Skip over Reserved Field */ | |
346 | buf[off++] = ((lu_gp_id >> 8) & 0xff); | |
347 | buf[off++] = (lu_gp_id & 0xff); | |
348 | len += 8; /* Header size + Designation descriptor */ | |
349 | /* | |
350 | * SCSI name string designator, see spc4r17 | |
351 | * section 7.7.3.11 | |
352 | * | |
353 | * Get the PROTOCOL IDENTIFIER as defined by spc4r17 | |
354 | * section 7.5.1 Table 362 | |
355 | */ | |
356 | check_scsi_name: | |
2aeeafae | 357 | buf[off] = tpg->proto_id << 4; |
1fd032ee CH |
358 | buf[off++] |= 0x3; /* CODE SET == UTF-8 */ |
359 | buf[off] = 0x80; /* Set PIV=1 */ | |
360 | /* Set ASSOCIATION == target port: 01b */ | |
361 | buf[off] |= 0x10; | |
362 | /* DESIGNATOR TYPE == SCSI name string */ | |
363 | buf[off++] |= 0x8; | |
364 | off += 2; /* Skip over Reserved and length */ | |
365 | /* | |
366 | * SCSI name string identifer containing, $FABRIC_MOD | |
367 | * dependent information. For LIO-Target and iSCSI | |
368 | * Target Port, this means "<iSCSI name>,t,0x<TPGT> in | |
369 | * UTF-8 encoding. | |
370 | */ | |
371 | tpgt = tpg->se_tpg_tfo->tpg_get_tag(tpg); | |
372 | scsi_name_len = sprintf(&buf[off], "%s,t,0x%04x", | |
373 | tpg->se_tpg_tfo->tpg_get_wwn(tpg), tpgt); | |
374 | scsi_name_len += 1 /* Include NULL terminator */; | |
375 | /* | |
376 | * The null-terminated, null-padded (see 4.4.2) SCSI | |
377 | * NAME STRING field contains a UTF-8 format string. | |
378 | * The number of bytes in the SCSI NAME STRING field | |
379 | * (i.e., the value in the DESIGNATOR LENGTH field) | |
380 | * shall be no larger than 256 and shall be a multiple | |
381 | * of four. | |
382 | */ | |
03ba84ca | 383 | padding = ((-scsi_name_len) & 3); |
1fd032ee CH |
384 | if (padding) |
385 | scsi_name_len += padding; | |
03ba84ca HR |
386 | if (scsi_name_len > 256) |
387 | scsi_name_len = 256; | |
1fd032ee CH |
388 | |
389 | buf[off-1] = scsi_name_len; | |
390 | off += scsi_name_len; | |
391 | /* Header size + Designation descriptor */ | |
392 | len += (scsi_name_len + 4); | |
fbfe858f HR |
393 | |
394 | /* | |
395 | * Target device designator | |
396 | */ | |
2aeeafae | 397 | buf[off] = tpg->proto_id << 4; |
fbfe858f HR |
398 | buf[off++] |= 0x3; /* CODE SET == UTF-8 */ |
399 | buf[off] = 0x80; /* Set PIV=1 */ | |
400 | /* Set ASSOCIATION == target device: 10b */ | |
401 | buf[off] |= 0x20; | |
402 | /* DESIGNATOR TYPE == SCSI name string */ | |
403 | buf[off++] |= 0x8; | |
404 | off += 2; /* Skip over Reserved and length */ | |
405 | /* | |
406 | * SCSI name string identifer containing, $FABRIC_MOD | |
407 | * dependent information. For LIO-Target and iSCSI | |
408 | * Target Port, this means "<iSCSI name>" in | |
409 | * UTF-8 encoding. | |
410 | */ | |
411 | scsi_target_len = sprintf(&buf[off], "%s", | |
412 | tpg->se_tpg_tfo->tpg_get_wwn(tpg)); | |
413 | scsi_target_len += 1 /* Include NULL terminator */; | |
414 | /* | |
415 | * The null-terminated, null-padded (see 4.4.2) SCSI | |
416 | * NAME STRING field contains a UTF-8 format string. | |
417 | * The number of bytes in the SCSI NAME STRING field | |
418 | * (i.e., the value in the DESIGNATOR LENGTH field) | |
419 | * shall be no larger than 256 and shall be a multiple | |
420 | * of four. | |
421 | */ | |
422 | padding = ((-scsi_target_len) & 3); | |
423 | if (padding) | |
424 | scsi_target_len += padding; | |
6a16d7be RD |
425 | if (scsi_target_len > 256) |
426 | scsi_target_len = 256; | |
fbfe858f HR |
427 | |
428 | buf[off-1] = scsi_target_len; | |
429 | off += scsi_target_len; | |
430 | ||
431 | /* Header size + Designation descriptor */ | |
432 | len += (scsi_target_len + 4); | |
1fd032ee CH |
433 | } |
434 | buf[2] = ((len >> 8) & 0xff); | |
435 | buf[3] = (len & 0xff); /* Page Length for VPD 0x83 */ | |
436 | return 0; | |
437 | } | |
0dfa1c5d | 438 | EXPORT_SYMBOL(spc_emulate_evpd_83); |
1fd032ee CH |
439 | |
440 | /* Extended INQUIRY Data VPD Page */ | |
de103c93 CH |
441 | static sense_reason_t |
442 | spc_emulate_evpd_86(struct se_cmd *cmd, unsigned char *buf) | |
1fd032ee | 443 | { |
d0c8b259 | 444 | struct se_device *dev = cmd->se_dev; |
d2c5304c | 445 | struct se_session *sess = cmd->se_sess; |
d0c8b259 | 446 | |
1fd032ee | 447 | buf[3] = 0x3c; |
43bb95c7 NB |
448 | /* |
449 | * Set GRD_CHK + REF_CHK for TYPE1 protection, or GRD_CHK | |
450 | * only for TYPE3 protection. | |
451 | */ | |
d2c5304c | 452 | if (sess->sup_prot_ops & (TARGET_PROT_DIN_PASS | TARGET_PROT_DOUT_PASS)) { |
9ef5466e NB |
453 | if (dev->dev_attrib.pi_prot_type == TARGET_DIF_TYPE1_PROT || |
454 | cmd->se_sess->sess_prot_type == TARGET_DIF_TYPE1_PROT) | |
d2c5304c | 455 | buf[4] = 0x5; |
9ef5466e | 456 | else if (dev->dev_attrib.pi_prot_type == TARGET_DIF_TYPE3_PROT || |
3aa3c67b | 457 | cmd->se_sess->sess_prot_type == TARGET_DIF_TYPE3_PROT) |
d2c5304c NB |
458 | buf[4] = 0x4; |
459 | } | |
43bb95c7 | 460 | |
27e6772b | 461 | /* logical unit supports type 1 and type 3 protection */ |
3aa3c67b NB |
462 | if ((dev->transport->get_device_type(dev) == TYPE_DISK) && |
463 | (sess->sup_prot_ops & (TARGET_PROT_DIN_PASS | TARGET_PROT_DOUT_PASS)) && | |
464 | (dev->dev_attrib.pi_prot_type || cmd->se_sess->sess_prot_type)) { | |
465 | buf[4] |= (0x3 << 3); | |
466 | } | |
27e6772b | 467 | |
1fd032ee CH |
468 | /* Set HEADSUP, ORDSUP, SIMPSUP */ |
469 | buf[5] = 0x07; | |
470 | ||
471 | /* If WriteCache emulation is enabled, set V_SUP */ | |
814e5b45 | 472 | if (target_check_wce(dev)) |
1fd032ee | 473 | buf[6] = 0x01; |
c66094bf HR |
474 | /* If an LBA map is present set R_SUP */ |
475 | spin_lock(&cmd->se_dev->t10_alua.lba_map_lock); | |
476 | if (!list_empty(&dev->t10_alua.lba_map_list)) | |
477 | buf[8] = 0x10; | |
478 | spin_unlock(&cmd->se_dev->t10_alua.lba_map_lock); | |
1fd032ee CH |
479 | return 0; |
480 | } | |
481 | ||
482 | /* Block Limits VPD page */ | |
de103c93 CH |
483 | static sense_reason_t |
484 | spc_emulate_evpd_b0(struct se_cmd *cmd, unsigned char *buf) | |
1fd032ee CH |
485 | { |
486 | struct se_device *dev = cmd->se_dev; | |
8f9b5654 NB |
487 | u32 mtl = 0; |
488 | int have_tp = 0, opt, min; | |
1fd032ee CH |
489 | |
490 | /* | |
491 | * Following spc3r22 section 6.5.3 Block Limits VPD page, when | |
492 | * emulate_tpu=1 or emulate_tpws=1 we will be expect a | |
493 | * different page length for Thin Provisioning. | |
494 | */ | |
0fd97ccf | 495 | if (dev->dev_attrib.emulate_tpu || dev->dev_attrib.emulate_tpws) |
1fd032ee CH |
496 | have_tp = 1; |
497 | ||
498 | buf[0] = dev->transport->get_device_type(dev); | |
499 | buf[3] = have_tp ? 0x3c : 0x10; | |
500 | ||
501 | /* Set WSNZ to 1 */ | |
502 | buf[4] = 0x01; | |
0123a9ec NB |
503 | /* |
504 | * Set MAXIMUM COMPARE AND WRITE LENGTH | |
505 | */ | |
506 | if (dev->dev_attrib.emulate_caw) | |
507 | buf[5] = 0x01; | |
1fd032ee CH |
508 | |
509 | /* | |
510 | * Set OPTIMAL TRANSFER LENGTH GRANULARITY | |
511 | */ | |
7f7caf6a AG |
512 | if (dev->transport->get_io_min && (min = dev->transport->get_io_min(dev))) |
513 | put_unaligned_be16(min / dev->dev_attrib.block_size, &buf[6]); | |
514 | else | |
515 | put_unaligned_be16(1, &buf[6]); | |
1fd032ee CH |
516 | |
517 | /* | |
518 | * Set MAXIMUM TRANSFER LENGTH | |
8f9b5654 NB |
519 | * |
520 | * XXX: Currently assumes single PAGE_SIZE per scatterlist for fabrics | |
521 | * enforcing maximum HW scatter-gather-list entry limit | |
1fd032ee | 522 | */ |
8f9b5654 NB |
523 | if (cmd->se_tfo->max_data_sg_nents) { |
524 | mtl = (cmd->se_tfo->max_data_sg_nents * PAGE_SIZE) / | |
525 | dev->dev_attrib.block_size; | |
526 | } | |
527 | put_unaligned_be32(min_not_zero(mtl, dev->dev_attrib.hw_max_sectors), &buf[8]); | |
1fd032ee CH |
528 | |
529 | /* | |
530 | * Set OPTIMAL TRANSFER LENGTH | |
531 | */ | |
7f7caf6a AG |
532 | if (dev->transport->get_io_opt && (opt = dev->transport->get_io_opt(dev))) |
533 | put_unaligned_be32(opt / dev->dev_attrib.block_size, &buf[12]); | |
534 | else | |
535 | put_unaligned_be32(dev->dev_attrib.optimal_sectors, &buf[12]); | |
1fd032ee CH |
536 | |
537 | /* | |
538 | * Exit now if we don't support TP. | |
539 | */ | |
540 | if (!have_tp) | |
773cbaf7 | 541 | goto max_write_same; |
1fd032ee CH |
542 | |
543 | /* | |
544 | * Set MAXIMUM UNMAP LBA COUNT | |
545 | */ | |
0fd97ccf | 546 | put_unaligned_be32(dev->dev_attrib.max_unmap_lba_count, &buf[20]); |
1fd032ee CH |
547 | |
548 | /* | |
549 | * Set MAXIMUM UNMAP BLOCK DESCRIPTOR COUNT | |
550 | */ | |
0fd97ccf | 551 | put_unaligned_be32(dev->dev_attrib.max_unmap_block_desc_count, |
1fd032ee CH |
552 | &buf[24]); |
553 | ||
554 | /* | |
555 | * Set OPTIMAL UNMAP GRANULARITY | |
556 | */ | |
0fd97ccf | 557 | put_unaligned_be32(dev->dev_attrib.unmap_granularity, &buf[28]); |
1fd032ee CH |
558 | |
559 | /* | |
560 | * UNMAP GRANULARITY ALIGNMENT | |
561 | */ | |
0fd97ccf | 562 | put_unaligned_be32(dev->dev_attrib.unmap_granularity_alignment, |
1fd032ee | 563 | &buf[32]); |
0fd97ccf | 564 | if (dev->dev_attrib.unmap_granularity_alignment != 0) |
1fd032ee CH |
565 | buf[32] |= 0x80; /* Set the UGAVALID bit */ |
566 | ||
773cbaf7 NB |
567 | /* |
568 | * MAXIMUM WRITE SAME LENGTH | |
569 | */ | |
570 | max_write_same: | |
571 | put_unaligned_be64(dev->dev_attrib.max_write_same_len, &buf[36]); | |
572 | ||
1fd032ee CH |
573 | return 0; |
574 | } | |
575 | ||
576 | /* Block Device Characteristics VPD page */ | |
de103c93 CH |
577 | static sense_reason_t |
578 | spc_emulate_evpd_b1(struct se_cmd *cmd, unsigned char *buf) | |
1fd032ee CH |
579 | { |
580 | struct se_device *dev = cmd->se_dev; | |
581 | ||
582 | buf[0] = dev->transport->get_device_type(dev); | |
583 | buf[3] = 0x3c; | |
0fd97ccf | 584 | buf[5] = dev->dev_attrib.is_nonrot ? 1 : 0; |
1fd032ee CH |
585 | |
586 | return 0; | |
587 | } | |
588 | ||
589 | /* Thin Provisioning VPD */ | |
de103c93 CH |
590 | static sense_reason_t |
591 | spc_emulate_evpd_b2(struct se_cmd *cmd, unsigned char *buf) | |
1fd032ee CH |
592 | { |
593 | struct se_device *dev = cmd->se_dev; | |
594 | ||
595 | /* | |
596 | * From spc3r22 section 6.5.4 Thin Provisioning VPD page: | |
597 | * | |
598 | * The PAGE LENGTH field is defined in SPC-4. If the DP bit is set to | |
599 | * zero, then the page length shall be set to 0004h. If the DP bit | |
600 | * is set to one, then the page length shall be set to the value | |
601 | * defined in table 162. | |
602 | */ | |
603 | buf[0] = dev->transport->get_device_type(dev); | |
604 | ||
605 | /* | |
606 | * Set Hardcoded length mentioned above for DP=0 | |
607 | */ | |
608 | put_unaligned_be16(0x0004, &buf[2]); | |
609 | ||
610 | /* | |
611 | * The THRESHOLD EXPONENT field indicates the threshold set size in | |
612 | * LBAs as a power of 2 (i.e., the threshold set size is equal to | |
613 | * 2(threshold exponent)). | |
614 | * | |
615 | * Note that this is currently set to 0x00 as mkp says it will be | |
616 | * changing again. We can enable this once it has settled in T10 | |
617 | * and is actually used by Linux/SCSI ML code. | |
618 | */ | |
619 | buf[4] = 0x00; | |
620 | ||
621 | /* | |
622 | * A TPU bit set to one indicates that the device server supports | |
623 | * the UNMAP command (see 5.25). A TPU bit set to zero indicates | |
624 | * that the device server does not support the UNMAP command. | |
625 | */ | |
0fd97ccf | 626 | if (dev->dev_attrib.emulate_tpu != 0) |
1fd032ee CH |
627 | buf[5] = 0x80; |
628 | ||
629 | /* | |
630 | * A TPWS bit set to one indicates that the device server supports | |
631 | * the use of the WRITE SAME (16) command (see 5.42) to unmap LBAs. | |
632 | * A TPWS bit set to zero indicates that the device server does not | |
633 | * support the use of the WRITE SAME (16) command to unmap LBAs. | |
634 | */ | |
0fd97ccf | 635 | if (dev->dev_attrib.emulate_tpws != 0) |
aa04dae4 | 636 | buf[5] |= 0x40 | 0x20; |
1fd032ee | 637 | |
e6f41633 JP |
638 | /* |
639 | * The unmap_zeroes_data set means that the underlying device supports | |
640 | * REQ_DISCARD and has the discard_zeroes_data bit set. This satisfies | |
641 | * the SBC requirements for LBPRZ, meaning that a subsequent read | |
642 | * will return zeroes after an UNMAP or WRITE SAME (16) to an LBA | |
643 | * See sbc4r36 6.6.4. | |
644 | */ | |
645 | if (((dev->dev_attrib.emulate_tpu != 0) || | |
646 | (dev->dev_attrib.emulate_tpws != 0)) && | |
647 | (dev->dev_attrib.unmap_zeroes_data != 0)) | |
648 | buf[5] |= 0x04; | |
649 | ||
1fd032ee CH |
650 | return 0; |
651 | } | |
652 | ||
c66094bf HR |
653 | /* Referrals VPD page */ |
654 | static sense_reason_t | |
655 | spc_emulate_evpd_b3(struct se_cmd *cmd, unsigned char *buf) | |
656 | { | |
657 | struct se_device *dev = cmd->se_dev; | |
658 | ||
659 | buf[0] = dev->transport->get_device_type(dev); | |
660 | buf[3] = 0x0c; | |
661 | put_unaligned_be32(dev->t10_alua.lba_map_segment_size, &buf[8]); | |
096b4995 | 662 | put_unaligned_be32(dev->t10_alua.lba_map_segment_multiplier, &buf[12]); |
c66094bf HR |
663 | |
664 | return 0; | |
665 | } | |
666 | ||
de103c93 CH |
667 | static sense_reason_t |
668 | spc_emulate_evpd_00(struct se_cmd *cmd, unsigned char *buf); | |
1fd032ee CH |
669 | |
670 | static struct { | |
671 | uint8_t page; | |
de103c93 | 672 | sense_reason_t (*emulate)(struct se_cmd *, unsigned char *); |
1fd032ee CH |
673 | } evpd_handlers[] = { |
674 | { .page = 0x00, .emulate = spc_emulate_evpd_00 }, | |
675 | { .page = 0x80, .emulate = spc_emulate_evpd_80 }, | |
676 | { .page = 0x83, .emulate = spc_emulate_evpd_83 }, | |
677 | { .page = 0x86, .emulate = spc_emulate_evpd_86 }, | |
678 | { .page = 0xb0, .emulate = spc_emulate_evpd_b0 }, | |
679 | { .page = 0xb1, .emulate = spc_emulate_evpd_b1 }, | |
680 | { .page = 0xb2, .emulate = spc_emulate_evpd_b2 }, | |
c66094bf | 681 | { .page = 0xb3, .emulate = spc_emulate_evpd_b3 }, |
1fd032ee CH |
682 | }; |
683 | ||
684 | /* supported vital product data pages */ | |
de103c93 CH |
685 | static sense_reason_t |
686 | spc_emulate_evpd_00(struct se_cmd *cmd, unsigned char *buf) | |
1fd032ee CH |
687 | { |
688 | int p; | |
689 | ||
690 | /* | |
691 | * Only report the INQUIRY EVPD=1 pages after a valid NAA | |
692 | * Registered Extended LUN WWN has been set via ConfigFS | |
693 | * during device creation/restart. | |
694 | */ | |
0fd97ccf | 695 | if (cmd->se_dev->dev_flags & DF_EMULATED_VPD_UNIT_SERIAL) { |
1fd032ee CH |
696 | buf[3] = ARRAY_SIZE(evpd_handlers); |
697 | for (p = 0; p < ARRAY_SIZE(evpd_handlers); ++p) | |
698 | buf[p + 4] = evpd_handlers[p].page; | |
699 | } | |
700 | ||
701 | return 0; | |
702 | } | |
703 | ||
de103c93 CH |
704 | static sense_reason_t |
705 | spc_emulate_inquiry(struct se_cmd *cmd) | |
1fd032ee CH |
706 | { |
707 | struct se_device *dev = cmd->se_dev; | |
adf653f9 | 708 | struct se_portal_group *tpg = cmd->se_lun->lun_tpg; |
ffe7b0e9 | 709 | unsigned char *rbuf; |
1fd032ee | 710 | unsigned char *cdb = cmd->t_task_cdb; |
f82f320e | 711 | unsigned char *buf; |
de103c93 CH |
712 | sense_reason_t ret; |
713 | int p; | |
2426bd45 | 714 | int len = 0; |
1fd032ee | 715 | |
f82f320e NB |
716 | buf = kzalloc(SE_INQUIRY_BUF, GFP_KERNEL); |
717 | if (!buf) { | |
718 | pr_err("Unable to allocate response buffer for INQUIRY\n"); | |
719 | return TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; | |
720 | } | |
dea5f099 | 721 | |
4cc987ea | 722 | if (dev == rcu_access_pointer(tpg->tpg_virt_lun0->lun_se_dev)) |
1fd032ee CH |
723 | buf[0] = 0x3f; /* Not connected */ |
724 | else | |
725 | buf[0] = dev->transport->get_device_type(dev); | |
726 | ||
727 | if (!(cdb[1] & 0x1)) { | |
728 | if (cdb[2]) { | |
729 | pr_err("INQUIRY with EVPD==0 but PAGE CODE=%02x\n", | |
730 | cdb[2]); | |
de103c93 | 731 | ret = TCM_INVALID_CDB_FIELD; |
1fd032ee CH |
732 | goto out; |
733 | } | |
734 | ||
735 | ret = spc_emulate_inquiry_std(cmd, buf); | |
2426bd45 | 736 | len = buf[4] + 5; |
1fd032ee CH |
737 | goto out; |
738 | } | |
739 | ||
740 | for (p = 0; p < ARRAY_SIZE(evpd_handlers); ++p) { | |
741 | if (cdb[2] == evpd_handlers[p].page) { | |
742 | buf[1] = cdb[2]; | |
743 | ret = evpd_handlers[p].emulate(cmd, buf); | |
2426bd45 | 744 | len = get_unaligned_be16(&buf[2]) + 4; |
1fd032ee CH |
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) | |
2426bd45 | 761 | target_complete_cmd_with_length(cmd, GOOD, len); |
1fd032ee CH |
762 | return ret; |
763 | } | |
764 | ||
d45aca42 | 765 | static int spc_modesense_rwrecovery(struct se_cmd *cmd, 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 | ||
d45aca42 | 778 | static int spc_modesense_control(struct se_cmd *cmd, u8 pc, u8 *p) |
1fd032ee | 779 | { |
d45aca42 NB |
780 | struct se_device *dev = cmd->se_dev; |
781 | struct se_session *sess = cmd->se_sess; | |
782 | ||
1fd032ee CH |
783 | p[0] = 0x0a; |
784 | p[1] = 0x0a; | |
d4b2b867 RD |
785 | |
786 | /* No changeable values for now */ | |
787 | if (pc == 1) | |
788 | goto out; | |
789 | ||
4e4937e8 SG |
790 | /* GLTSD: No implicit save of log parameters */ |
791 | p[2] = (1 << 1); | |
792 | if (target_sense_desc_format(dev)) | |
793 | /* D_SENSE: Descriptor format sense data for 64bit sectors */ | |
794 | p[2] |= (1 << 2); | |
795 | ||
1fd032ee CH |
796 | /* |
797 | * From spc4r23, 7.4.7 Control mode page | |
798 | * | |
799 | * The QUEUE ALGORITHM MODIFIER field (see table 368) specifies | |
800 | * restrictions on the algorithm used for reordering commands | |
801 | * having the SIMPLE task attribute (see SAM-4). | |
802 | * | |
803 | * Table 368 -- QUEUE ALGORITHM MODIFIER field | |
804 | * Code Description | |
805 | * 0h Restricted reordering | |
806 | * 1h Unrestricted reordering allowed | |
807 | * 2h to 7h Reserved | |
808 | * 8h to Fh Vendor specific | |
809 | * | |
810 | * A value of zero in the QUEUE ALGORITHM MODIFIER field specifies that | |
811 | * the device server shall order the processing sequence of commands | |
812 | * having the SIMPLE task attribute such that data integrity is maintained | |
813 | * for that I_T nexus (i.e., if the transmission of new SCSI transport protocol | |
814 | * requests is halted at any time, the final value of all data observable | |
815 | * on the medium shall be the same as if all the commands had been processed | |
816 | * with the ORDERED task attribute). | |
817 | * | |
818 | * A value of one in the QUEUE ALGORITHM MODIFIER field specifies that the | |
819 | * device server may reorder the processing sequence of commands having the | |
820 | * SIMPLE task attribute in any manner. Any data integrity exposures related to | |
821 | * command sequence order shall be explicitly handled by the application client | |
822 | * through the selection of appropriate ommands and task attributes. | |
823 | */ | |
0fd97ccf | 824 | p[3] = (dev->dev_attrib.emulate_rest_reord == 1) ? 0x00 : 0x10; |
1fd032ee CH |
825 | /* |
826 | * From spc4r17, section 7.4.6 Control mode Page | |
827 | * | |
828 | * Unit Attention interlocks control (UN_INTLCK_CTRL) to code 00b | |
829 | * | |
830 | * 00b: The logical unit shall clear any unit attention condition | |
831 | * reported in the same I_T_L_Q nexus transaction as a CHECK CONDITION | |
832 | * status and shall not establish a unit attention condition when a com- | |
833 | * mand is completed with BUSY, TASK SET FULL, or RESERVATION CONFLICT | |
834 | * status. | |
835 | * | |
836 | * 10b: The logical unit shall not clear any unit attention condition | |
837 | * reported in the same I_T_L_Q nexus transaction as a CHECK CONDITION | |
838 | * status and shall not establish a unit attention condition when | |
839 | * a command is completed with BUSY, TASK SET FULL, or RESERVATION | |
840 | * CONFLICT status. | |
841 | * | |
842 | * 11b a The logical unit shall not clear any unit attention condition | |
843 | * reported in the same I_T_L_Q nexus transaction as a CHECK CONDITION | |
844 | * status and shall establish a unit attention condition for the | |
845 | * initiator port associated with the I_T nexus on which the BUSY, | |
846 | * TASK SET FULL, or RESERVATION CONFLICT status is being returned. | |
847 | * Depending on the status, the additional sense code shall be set to | |
848 | * PREVIOUS BUSY STATUS, PREVIOUS TASK SET FULL STATUS, or PREVIOUS | |
849 | * RESERVATION CONFLICT STATUS. Until it is cleared by a REQUEST SENSE | |
850 | * command, a unit attention condition shall be established only once | |
851 | * for a BUSY, TASK SET FULL, or RESERVATION CONFLICT status regardless | |
852 | * to the number of commands completed with one of those status codes. | |
853 | */ | |
0fd97ccf CH |
854 | p[4] = (dev->dev_attrib.emulate_ua_intlck_ctrl == 2) ? 0x30 : |
855 | (dev->dev_attrib.emulate_ua_intlck_ctrl == 1) ? 0x20 : 0x00; | |
1fd032ee CH |
856 | /* |
857 | * From spc4r17, section 7.4.6 Control mode Page | |
858 | * | |
859 | * Task Aborted Status (TAS) bit set to zero. | |
860 | * | |
861 | * A task aborted status (TAS) bit set to zero specifies that aborted | |
862 | * tasks shall be terminated by the device server without any response | |
863 | * to the application client. A TAS bit set to one specifies that tasks | |
864 | * aborted by the actions of an I_T nexus other than the I_T nexus on | |
865 | * which the command was received shall be completed with TASK ABORTED | |
866 | * status (see SAM-4). | |
867 | */ | |
0fd97ccf | 868 | p[5] = (dev->dev_attrib.emulate_tas) ? 0x40 : 0x00; |
0c30f421 NB |
869 | /* |
870 | * From spc4r30, section 7.5.7 Control mode page | |
871 | * | |
872 | * Application Tag Owner (ATO) bit set to one. | |
873 | * | |
874 | * If the ATO bit is set to one the device server shall not modify the | |
875 | * LOGICAL BLOCK APPLICATION TAG field and, depending on the protection | |
876 | * type, shall not modify the contents of the LOGICAL BLOCK REFERENCE | |
877 | * TAG field. | |
878 | */ | |
d45aca42 | 879 | if (sess->sup_prot_ops & (TARGET_PROT_DIN_PASS | TARGET_PROT_DOUT_PASS)) { |
9ef5466e | 880 | if (dev->dev_attrib.pi_prot_type || sess->sess_prot_type) |
d45aca42 NB |
881 | p[5] |= 0x80; |
882 | } | |
0c30f421 | 883 | |
1fd032ee CH |
884 | p[8] = 0xff; |
885 | p[9] = 0xff; | |
886 | p[11] = 30; | |
887 | ||
d4b2b867 | 888 | out: |
1fd032ee CH |
889 | return 12; |
890 | } | |
891 | ||
d45aca42 | 892 | static int spc_modesense_caching(struct se_cmd *cmd, u8 pc, u8 *p) |
1fd032ee | 893 | { |
d45aca42 NB |
894 | struct se_device *dev = cmd->se_dev; |
895 | ||
1fd032ee CH |
896 | p[0] = 0x08; |
897 | p[1] = 0x12; | |
d4b2b867 RD |
898 | |
899 | /* No changeable values for now */ | |
900 | if (pc == 1) | |
901 | goto out; | |
902 | ||
814e5b45 | 903 | if (target_check_wce(dev)) |
1fd032ee CH |
904 | p[2] = 0x04; /* Write Cache Enable */ |
905 | p[12] = 0x20; /* Disabled Read Ahead */ | |
906 | ||
d4b2b867 | 907 | out: |
1fd032ee CH |
908 | return 20; |
909 | } | |
910 | ||
d45aca42 | 911 | static int spc_modesense_informational_exceptions(struct se_cmd *cmd, u8 pc, unsigned char *p) |
0f6d64ce RD |
912 | { |
913 | p[0] = 0x1c; | |
914 | p[1] = 0x0a; | |
915 | ||
916 | /* No changeable values for now */ | |
917 | if (pc == 1) | |
918 | goto out; | |
919 | ||
920 | out: | |
921 | return 12; | |
922 | } | |
923 | ||
d4b2b867 RD |
924 | static struct { |
925 | uint8_t page; | |
926 | uint8_t subpage; | |
d45aca42 | 927 | int (*emulate)(struct se_cmd *, u8, unsigned char *); |
d4b2b867 RD |
928 | } modesense_handlers[] = { |
929 | { .page = 0x01, .subpage = 0x00, .emulate = spc_modesense_rwrecovery }, | |
930 | { .page = 0x08, .subpage = 0x00, .emulate = spc_modesense_caching }, | |
931 | { .page = 0x0a, .subpage = 0x00, .emulate = spc_modesense_control }, | |
0f6d64ce | 932 | { .page = 0x1c, .subpage = 0x00, .emulate = spc_modesense_informational_exceptions }, |
d4b2b867 RD |
933 | }; |
934 | ||
1fd032ee CH |
935 | static void spc_modesense_write_protect(unsigned char *buf, int type) |
936 | { | |
937 | /* | |
938 | * I believe that the WP bit (bit 7) in the mode header is the same for | |
939 | * all device types.. | |
940 | */ | |
941 | switch (type) { | |
942 | case TYPE_DISK: | |
943 | case TYPE_TAPE: | |
944 | default: | |
945 | buf[0] |= 0x80; /* WP bit */ | |
946 | break; | |
947 | } | |
948 | } | |
949 | ||
950 | static void spc_modesense_dpofua(unsigned char *buf, int type) | |
951 | { | |
952 | switch (type) { | |
953 | case TYPE_DISK: | |
954 | buf[0] |= 0x10; /* DPOFUA bit */ | |
955 | break; | |
956 | default: | |
957 | break; | |
958 | } | |
959 | } | |
960 | ||
d4b2b867 RD |
961 | static int spc_modesense_blockdesc(unsigned char *buf, u64 blocks, u32 block_size) |
962 | { | |
963 | *buf++ = 8; | |
964 | put_unaligned_be32(min(blocks, 0xffffffffull), buf); | |
965 | buf += 4; | |
966 | put_unaligned_be32(block_size, buf); | |
967 | return 9; | |
968 | } | |
969 | ||
970 | static int spc_modesense_long_blockdesc(unsigned char *buf, u64 blocks, u32 block_size) | |
971 | { | |
972 | if (blocks <= 0xffffffff) | |
973 | return spc_modesense_blockdesc(buf + 3, blocks, block_size) + 3; | |
974 | ||
975 | *buf++ = 1; /* LONGLBA */ | |
976 | buf += 2; | |
977 | *buf++ = 16; | |
978 | put_unaligned_be64(blocks, buf); | |
979 | buf += 12; | |
980 | put_unaligned_be32(block_size, buf); | |
981 | ||
982 | return 17; | |
983 | } | |
984 | ||
de103c93 | 985 | static sense_reason_t spc_emulate_modesense(struct se_cmd *cmd) |
1fd032ee CH |
986 | { |
987 | struct se_device *dev = cmd->se_dev; | |
988 | char *cdb = cmd->t_task_cdb; | |
cab9609b | 989 | unsigned char buf[SE_MODE_PAGE_BUF], *rbuf; |
1fd032ee CH |
990 | int type = dev->transport->get_device_type(dev); |
991 | int ten = (cmd->t_task_cdb[0] == MODE_SENSE_10); | |
d4b2b867 RD |
992 | bool dbd = !!(cdb[1] & 0x08); |
993 | bool llba = ten ? !!(cdb[1] & 0x10) : false; | |
994 | u8 pc = cdb[2] >> 6; | |
995 | u8 page = cdb[2] & 0x3f; | |
996 | u8 subpage = cdb[3]; | |
1fd032ee | 997 | int length = 0; |
d4b2b867 RD |
998 | int ret; |
999 | int i; | |
1fd032ee | 1000 | |
cab9609b NB |
1001 | memset(buf, 0, SE_MODE_PAGE_BUF); |
1002 | ||
fecae40a NB |
1003 | /* |
1004 | * Skip over MODE DATA LENGTH + MEDIUM TYPE fields to byte 3 for | |
1005 | * MODE_SENSE_10 and byte 2 for MODE_SENSE (6). | |
1006 | */ | |
1007 | length = ten ? 3 : 2; | |
d4b2b867 RD |
1008 | |
1009 | /* DEVICE-SPECIFIC PARAMETER */ | |
03a68b44 | 1010 | if (cmd->se_lun->lun_access_ro || target_lun_is_rdonly(cmd)) |
d4b2b867 RD |
1011 | spc_modesense_write_protect(&buf[length], type); |
1012 | ||
814e5b45 CH |
1013 | /* |
1014 | * SBC only allows us to enable FUA and DPO together. Fortunately | |
1015 | * DPO is explicitly specified as a hint, so a noop is a perfectly | |
1016 | * valid implementation. | |
1017 | */ | |
1018 | if (target_check_fua(dev)) | |
d4b2b867 RD |
1019 | spc_modesense_dpofua(&buf[length], type); |
1020 | ||
1021 | ++length; | |
1022 | ||
1023 | /* BLOCK DESCRIPTOR */ | |
1024 | ||
1025 | /* | |
1026 | * For now we only include a block descriptor for disk (SBC) | |
1027 | * devices; other command sets use a slightly different format. | |
1028 | */ | |
1029 | if (!dbd && type == TYPE_DISK) { | |
1030 | u64 blocks = dev->transport->get_blocks(dev); | |
1031 | u32 block_size = dev->dev_attrib.block_size; | |
1032 | ||
1033 | if (ten) { | |
1034 | if (llba) { | |
1035 | length += spc_modesense_long_blockdesc(&buf[length], | |
1036 | blocks, block_size); | |
1037 | } else { | |
1038 | length += 3; | |
1039 | length += spc_modesense_blockdesc(&buf[length], | |
1040 | blocks, block_size); | |
1041 | } | |
1042 | } else { | |
1043 | length += spc_modesense_blockdesc(&buf[length], blocks, | |
1044 | block_size); | |
1045 | } | |
1fd032ee | 1046 | } else { |
d4b2b867 RD |
1047 | if (ten) |
1048 | length += 4; | |
1049 | else | |
1050 | length += 1; | |
1fd032ee CH |
1051 | } |
1052 | ||
d4b2b867 RD |
1053 | if (page == 0x3f) { |
1054 | if (subpage != 0x00 && subpage != 0xff) { | |
de103c93 | 1055 | pr_warn("MODE_SENSE: Invalid subpage code: 0x%02x\n", subpage); |
de103c93 | 1056 | return TCM_INVALID_CDB_FIELD; |
d4b2b867 RD |
1057 | } |
1058 | ||
1059 | for (i = 0; i < ARRAY_SIZE(modesense_handlers); ++i) { | |
1060 | /* | |
1061 | * Tricky way to say all subpage 00h for | |
1062 | * subpage==0, all subpages for subpage==0xff | |
1063 | * (and we just checked above that those are | |
1064 | * the only two possibilities). | |
1065 | */ | |
1066 | if ((modesense_handlers[i].subpage & ~subpage) == 0) { | |
d45aca42 | 1067 | ret = modesense_handlers[i].emulate(cmd, pc, &buf[length]); |
d4b2b867 RD |
1068 | if (!ten && length + ret >= 255) |
1069 | break; | |
1070 | length += ret; | |
1071 | } | |
1072 | } | |
1073 | ||
1074 | goto set_length; | |
1075 | } | |
1076 | ||
1077 | for (i = 0; i < ARRAY_SIZE(modesense_handlers); ++i) | |
1078 | if (modesense_handlers[i].page == page && | |
1079 | modesense_handlers[i].subpage == subpage) { | |
d45aca42 | 1080 | length += modesense_handlers[i].emulate(cmd, pc, &buf[length]); |
d4b2b867 RD |
1081 | goto set_length; |
1082 | } | |
1083 | ||
1084 | /* | |
1085 | * We don't intend to implement: | |
1086 | * - obsolete page 03h "format parameters" (checked by Solaris) | |
1087 | */ | |
1088 | if (page != 0x03) | |
1089 | pr_err("MODE SENSE: unimplemented page/subpage: 0x%02x/0x%02x\n", | |
1090 | page, subpage); | |
1091 | ||
de103c93 | 1092 | return TCM_UNKNOWN_MODE_PAGE; |
d4b2b867 RD |
1093 | |
1094 | set_length: | |
1095 | if (ten) | |
1096 | put_unaligned_be16(length - 2, buf); | |
1097 | else | |
1098 | buf[0] = length - 1; | |
1099 | ||
cab9609b NB |
1100 | rbuf = transport_kmap_data_sg(cmd); |
1101 | if (rbuf) { | |
1102 | memcpy(rbuf, buf, min_t(u32, SE_MODE_PAGE_BUF, cmd->data_length)); | |
1103 | transport_kunmap_data_sg(cmd); | |
7a3f369c | 1104 | } |
1fd032ee | 1105 | |
2426bd45 | 1106 | target_complete_cmd_with_length(cmd, GOOD, length); |
1fd032ee CH |
1107 | return 0; |
1108 | } | |
1109 | ||
de103c93 | 1110 | static sense_reason_t spc_emulate_modeselect(struct se_cmd *cmd) |
3a3c5e4a | 1111 | { |
3a3c5e4a RD |
1112 | char *cdb = cmd->t_task_cdb; |
1113 | bool ten = cdb[0] == MODE_SELECT_10; | |
1114 | int off = ten ? 8 : 4; | |
1115 | bool pf = !!(cdb[1] & 0x10); | |
1116 | u8 page, subpage; | |
1117 | unsigned char *buf; | |
1118 | unsigned char tbuf[SE_MODE_PAGE_BUF]; | |
1119 | int length; | |
3abff1e5 | 1120 | sense_reason_t ret = 0; |
3a3c5e4a RD |
1121 | int i; |
1122 | ||
71f41fe1 RD |
1123 | if (!cmd->data_length) { |
1124 | target_complete_cmd(cmd, GOOD); | |
1125 | return 0; | |
1126 | } | |
1127 | ||
1128 | if (cmd->data_length < off + 2) | |
1129 | return TCM_PARAMETER_LIST_LENGTH_ERROR; | |
1130 | ||
3a3c5e4a | 1131 | buf = transport_kmap_data_sg(cmd); |
de103c93 CH |
1132 | if (!buf) |
1133 | return TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; | |
3a3c5e4a RD |
1134 | |
1135 | if (!pf) { | |
de103c93 | 1136 | ret = TCM_INVALID_CDB_FIELD; |
3a3c5e4a RD |
1137 | goto out; |
1138 | } | |
1139 | ||
1140 | page = buf[off] & 0x3f; | |
1141 | subpage = buf[off] & 0x40 ? buf[off + 1] : 0; | |
1142 | ||
1143 | for (i = 0; i < ARRAY_SIZE(modesense_handlers); ++i) | |
1144 | if (modesense_handlers[i].page == page && | |
1145 | modesense_handlers[i].subpage == subpage) { | |
1146 | memset(tbuf, 0, SE_MODE_PAGE_BUF); | |
d45aca42 | 1147 | length = modesense_handlers[i].emulate(cmd, 0, tbuf); |
3a3c5e4a RD |
1148 | goto check_contents; |
1149 | } | |
1150 | ||
de103c93 | 1151 | ret = TCM_UNKNOWN_MODE_PAGE; |
3a3c5e4a RD |
1152 | goto out; |
1153 | ||
1154 | check_contents: | |
71f41fe1 RD |
1155 | if (cmd->data_length < off + length) { |
1156 | ret = TCM_PARAMETER_LIST_LENGTH_ERROR; | |
1157 | goto out; | |
1158 | } | |
1159 | ||
de103c93 CH |
1160 | if (memcmp(buf + off, tbuf, length)) |
1161 | ret = TCM_INVALID_PARAMETER_LIST; | |
3a3c5e4a RD |
1162 | |
1163 | out: | |
1164 | transport_kunmap_data_sg(cmd); | |
1165 | ||
1166 | if (!ret) | |
1167 | target_complete_cmd(cmd, GOOD); | |
1168 | return ret; | |
1169 | } | |
1170 | ||
de103c93 | 1171 | static sense_reason_t spc_emulate_request_sense(struct se_cmd *cmd) |
1fd032ee CH |
1172 | { |
1173 | unsigned char *cdb = cmd->t_task_cdb; | |
32a8811f | 1174 | unsigned char *rbuf; |
1fd032ee | 1175 | u8 ua_asc = 0, ua_ascq = 0; |
32a8811f | 1176 | unsigned char buf[SE_SENSE_BUF]; |
4e4937e8 | 1177 | bool desc_format = target_sense_desc_format(cmd->se_dev); |
32a8811f PB |
1178 | |
1179 | memset(buf, 0, SE_SENSE_BUF); | |
1fd032ee CH |
1180 | |
1181 | if (cdb[1] & 0x01) { | |
1182 | pr_err("REQUEST_SENSE description emulation not" | |
1183 | " supported\n"); | |
de103c93 | 1184 | return TCM_INVALID_CDB_FIELD; |
1fd032ee CH |
1185 | } |
1186 | ||
32a8811f | 1187 | rbuf = transport_kmap_data_sg(cmd); |
de103c93 CH |
1188 | if (!rbuf) |
1189 | return TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; | |
1190 | ||
9ec1e1ce | 1191 | if (!core_scsi3_ua_clear_for_request_sense(cmd, &ua_asc, &ua_ascq)) |
4e4937e8 | 1192 | scsi_build_sense_buffer(desc_format, buf, UNIT_ATTENTION, |
9ec1e1ce SG |
1193 | ua_asc, ua_ascq); |
1194 | else | |
4e4937e8 | 1195 | scsi_build_sense_buffer(desc_format, buf, NO_SENSE, 0x0, 0x0); |
1fd032ee | 1196 | |
de103c93 CH |
1197 | memcpy(rbuf, buf, min_t(u32, sizeof(buf), cmd->data_length)); |
1198 | transport_kunmap_data_sg(cmd); | |
32a8811f | 1199 | |
1fd032ee CH |
1200 | target_complete_cmd(cmd, GOOD); |
1201 | return 0; | |
1202 | } | |
1203 | ||
de103c93 | 1204 | sense_reason_t spc_emulate_report_luns(struct se_cmd *cmd) |
d1b1f805 CH |
1205 | { |
1206 | struct se_dev_entry *deve; | |
1207 | struct se_session *sess = cmd->se_sess; | |
29a05dee | 1208 | struct se_node_acl *nacl; |
0f69a387 | 1209 | struct scsi_lun slun; |
d1b1f805 | 1210 | unsigned char *buf; |
29a05dee | 1211 | u32 lun_count = 0, offset = 8; |
0f69a387 | 1212 | __be32 len; |
d1b1f805 CH |
1213 | |
1214 | buf = transport_kmap_data_sg(cmd); | |
0f69a387 | 1215 | if (cmd->data_length && !buf) |
de103c93 | 1216 | return TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; |
d1b1f805 CH |
1217 | |
1218 | /* | |
1219 | * If no struct se_session pointer is present, this struct se_cmd is | |
1220 | * coming via a target_core_mod PASSTHROUGH op, and not through | |
1221 | * a $FABRIC_MOD. In that case, report LUN=0 only. | |
1222 | */ | |
9c395170 | 1223 | if (!sess) |
d1b1f805 | 1224 | goto done; |
9c395170 | 1225 | |
29a05dee | 1226 | nacl = sess->se_node_acl; |
d1b1f805 | 1227 | |
29a05dee NB |
1228 | rcu_read_lock(); |
1229 | hlist_for_each_entry_rcu(deve, &nacl->lun_entry_hlist, link) { | |
d1b1f805 CH |
1230 | /* |
1231 | * We determine the correct LUN LIST LENGTH even once we | |
1232 | * have reached the initial allocation length. | |
1233 | * See SPC2-R20 7.19. | |
1234 | */ | |
1235 | lun_count++; | |
0f69a387 | 1236 | if (offset >= cmd->data_length) |
d1b1f805 CH |
1237 | continue; |
1238 | ||
0f69a387 RD |
1239 | int_to_scsilun(deve->mapped_lun, &slun); |
1240 | memcpy(buf + offset, &slun, | |
1241 | min(8u, cmd->data_length - offset)); | |
d1b1f805 CH |
1242 | offset += 8; |
1243 | } | |
29a05dee | 1244 | rcu_read_unlock(); |
d1b1f805 CH |
1245 | |
1246 | /* | |
1247 | * See SPC3 r07, page 159. | |
1248 | */ | |
1249 | done: | |
9c395170 RD |
1250 | /* |
1251 | * If no LUNs are accessible, report virtual LUN 0. | |
1252 | */ | |
1253 | if (lun_count == 0) { | |
0f69a387 RD |
1254 | int_to_scsilun(0, &slun); |
1255 | if (cmd->data_length > 8) | |
1256 | memcpy(buf + offset, &slun, | |
1257 | min(8u, cmd->data_length - offset)); | |
9c395170 RD |
1258 | lun_count = 1; |
1259 | } | |
1260 | ||
0f69a387 RD |
1261 | if (buf) { |
1262 | len = cpu_to_be32(lun_count * 8); | |
1263 | memcpy(buf, &len, min_t(int, sizeof len, cmd->data_length)); | |
1264 | transport_kunmap_data_sg(cmd); | |
1265 | } | |
d1b1f805 | 1266 | |
2426bd45 | 1267 | target_complete_cmd_with_length(cmd, GOOD, 8 + lun_count * 8); |
d1b1f805 CH |
1268 | return 0; |
1269 | } | |
8de530a5 | 1270 | EXPORT_SYMBOL(spc_emulate_report_luns); |
d1b1f805 | 1271 | |
de103c93 CH |
1272 | static sense_reason_t |
1273 | spc_emulate_testunitready(struct se_cmd *cmd) | |
1fd032ee CH |
1274 | { |
1275 | target_complete_cmd(cmd, GOOD); | |
1276 | return 0; | |
1277 | } | |
1278 | ||
de103c93 CH |
1279 | sense_reason_t |
1280 | spc_parse_cdb(struct se_cmd *cmd, unsigned int *size) | |
88455ec4 | 1281 | { |
eba2ca45 | 1282 | struct se_device *dev = cmd->se_dev; |
88455ec4 CH |
1283 | unsigned char *cdb = cmd->t_task_cdb; |
1284 | ||
1285 | switch (cdb[0]) { | |
1286 | case MODE_SELECT: | |
1287 | *size = cdb[4]; | |
3a3c5e4a | 1288 | cmd->execute_cmd = spc_emulate_modeselect; |
88455ec4 CH |
1289 | break; |
1290 | case MODE_SELECT_10: | |
1291 | *size = (cdb[7] << 8) + cdb[8]; | |
3a3c5e4a | 1292 | cmd->execute_cmd = spc_emulate_modeselect; |
88455ec4 CH |
1293 | break; |
1294 | case MODE_SENSE: | |
1295 | *size = cdb[4]; | |
1fd032ee | 1296 | cmd->execute_cmd = spc_emulate_modesense; |
88455ec4 CH |
1297 | break; |
1298 | case MODE_SENSE_10: | |
1299 | *size = (cdb[7] << 8) + cdb[8]; | |
1fd032ee | 1300 | cmd->execute_cmd = spc_emulate_modesense; |
88455ec4 CH |
1301 | break; |
1302 | case LOG_SELECT: | |
1303 | case LOG_SENSE: | |
1304 | *size = (cdb[7] << 8) + cdb[8]; | |
1305 | break; | |
1306 | case PERSISTENT_RESERVE_IN: | |
88455ec4 | 1307 | *size = (cdb[7] << 8) + cdb[8]; |
d977f437 | 1308 | cmd->execute_cmd = target_scsi3_emulate_pr_in; |
88455ec4 CH |
1309 | break; |
1310 | case PERSISTENT_RESERVE_OUT: | |
88455ec4 | 1311 | *size = (cdb[7] << 8) + cdb[8]; |
d977f437 | 1312 | cmd->execute_cmd = target_scsi3_emulate_pr_out; |
88455ec4 CH |
1313 | break; |
1314 | case RELEASE: | |
1315 | case RELEASE_10: | |
1316 | if (cdb[0] == RELEASE_10) | |
1317 | *size = (cdb[7] << 8) | cdb[8]; | |
1318 | else | |
1319 | *size = cmd->data_length; | |
1320 | ||
d977f437 | 1321 | cmd->execute_cmd = target_scsi2_reservation_release; |
88455ec4 CH |
1322 | break; |
1323 | case RESERVE: | |
1324 | case RESERVE_10: | |
1325 | /* | |
1326 | * The SPC-2 RESERVE does not contain a size in the SCSI CDB. | |
1327 | * Assume the passthrough or $FABRIC_MOD will tell us about it. | |
1328 | */ | |
1329 | if (cdb[0] == RESERVE_10) | |
1330 | *size = (cdb[7] << 8) | cdb[8]; | |
1331 | else | |
1332 | *size = cmd->data_length; | |
1333 | ||
d977f437 | 1334 | cmd->execute_cmd = target_scsi2_reservation_reserve; |
88455ec4 CH |
1335 | break; |
1336 | case REQUEST_SENSE: | |
1337 | *size = cdb[4]; | |
1fd032ee | 1338 | cmd->execute_cmd = spc_emulate_request_sense; |
88455ec4 CH |
1339 | break; |
1340 | case INQUIRY: | |
1341 | *size = (cdb[3] << 8) + cdb[4]; | |
1342 | ||
1343 | /* | |
125d0119 | 1344 | * Do implicit HEAD_OF_QUEUE processing for INQUIRY. |
88455ec4 CH |
1345 | * See spc4r17 section 5.3 |
1346 | */ | |
68d81f40 | 1347 | cmd->sam_task_attr = TCM_HEAD_TAG; |
1fd032ee | 1348 | cmd->execute_cmd = spc_emulate_inquiry; |
88455ec4 CH |
1349 | break; |
1350 | case SECURITY_PROTOCOL_IN: | |
1351 | case SECURITY_PROTOCOL_OUT: | |
1352 | *size = (cdb[6] << 24) | (cdb[7] << 16) | (cdb[8] << 8) | cdb[9]; | |
1353 | break; | |
1354 | case EXTENDED_COPY: | |
04b1b795 NB |
1355 | *size = get_unaligned_be32(&cdb[10]); |
1356 | cmd->execute_cmd = target_do_xcopy; | |
1357 | break; | |
88455ec4 | 1358 | case RECEIVE_COPY_RESULTS: |
04b1b795 NB |
1359 | *size = get_unaligned_be32(&cdb[10]); |
1360 | cmd->execute_cmd = target_do_receive_copy_results; | |
1361 | break; | |
1362 | case READ_ATTRIBUTE: | |
88455ec4 CH |
1363 | case WRITE_ATTRIBUTE: |
1364 | *size = (cdb[10] << 24) | (cdb[11] << 16) | | |
1365 | (cdb[12] << 8) | cdb[13]; | |
1366 | break; | |
1367 | case RECEIVE_DIAGNOSTIC: | |
1368 | case SEND_DIAGNOSTIC: | |
1369 | *size = (cdb[3] << 8) | cdb[4]; | |
1370 | break; | |
1371 | case WRITE_BUFFER: | |
1372 | *size = (cdb[6] << 16) + (cdb[7] << 8) + cdb[8]; | |
1373 | break; | |
1374 | case REPORT_LUNS: | |
d1b1f805 | 1375 | cmd->execute_cmd = spc_emulate_report_luns; |
88455ec4 CH |
1376 | *size = (cdb[6] << 24) | (cdb[7] << 16) | (cdb[8] << 8) | cdb[9]; |
1377 | /* | |
125d0119 | 1378 | * Do implicit HEAD_OF_QUEUE processing for REPORT_LUNS |
88455ec4 CH |
1379 | * See spc4r17 section 5.3 |
1380 | */ | |
68d81f40 | 1381 | cmd->sam_task_attr = TCM_HEAD_TAG; |
88455ec4 CH |
1382 | break; |
1383 | case TEST_UNIT_READY: | |
1fd032ee | 1384 | cmd->execute_cmd = spc_emulate_testunitready; |
d6e0175c | 1385 | *size = 0; |
88455ec4 | 1386 | break; |
eba2ca45 NB |
1387 | case MAINTENANCE_IN: |
1388 | if (dev->transport->get_device_type(dev) != TYPE_ROM) { | |
1389 | /* | |
1390 | * MAINTENANCE_IN from SCC-2 | |
1391 | * Check for emulated MI_REPORT_TARGET_PGS | |
1392 | */ | |
c87fbd56 | 1393 | if ((cdb[1] & 0x1f) == MI_REPORT_TARGET_PGS) { |
eba2ca45 NB |
1394 | cmd->execute_cmd = |
1395 | target_emulate_report_target_port_groups; | |
1396 | } | |
1397 | *size = get_unaligned_be32(&cdb[6]); | |
1398 | } else { | |
1399 | /* | |
1400 | * GPCMD_SEND_KEY from multi media commands | |
1401 | */ | |
1402 | *size = get_unaligned_be16(&cdb[8]); | |
1403 | } | |
1404 | break; | |
1405 | case MAINTENANCE_OUT: | |
1406 | if (dev->transport->get_device_type(dev) != TYPE_ROM) { | |
1407 | /* | |
1408 | * MAINTENANCE_OUT from SCC-2 | |
1409 | * Check for emulated MO_SET_TARGET_PGS. | |
1410 | */ | |
c87fbd56 | 1411 | if (cdb[1] == MO_SET_TARGET_PGS) { |
eba2ca45 NB |
1412 | cmd->execute_cmd = |
1413 | target_emulate_set_target_port_groups; | |
1414 | } | |
1415 | *size = get_unaligned_be32(&cdb[6]); | |
1416 | } else { | |
1417 | /* | |
1418 | * GPCMD_SEND_KEY from multi media commands | |
1419 | */ | |
1420 | *size = get_unaligned_be16(&cdb[8]); | |
1421 | } | |
1422 | break; | |
88455ec4 | 1423 | default: |
de103c93 | 1424 | return TCM_UNSUPPORTED_SCSI_OPCODE; |
88455ec4 CH |
1425 | } |
1426 | ||
1427 | return 0; | |
1428 | } | |
1429 | EXPORT_SYMBOL(spc_parse_cdb); |