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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; | |
d2c5304c | 74 | struct se_session *sess = cmd->se_sess; |
1fd032ee CH |
75 | |
76 | /* Set RMB (removable media) for tape devices */ | |
77 | if (dev->transport->get_device_type(dev) == TYPE_TAPE) | |
78 | buf[1] = 0x80; | |
79 | ||
48c2567d | 80 | buf[2] = 0x05; /* SPC-3 */ |
1fd032ee CH |
81 | |
82 | /* | |
83 | * NORMACA and HISUP = 0, RESPONSE DATA FORMAT = 2 | |
84 | * | |
85 | * SPC4 says: | |
86 | * A RESPONSE DATA FORMAT field set to 2h indicates that the | |
87 | * standard INQUIRY data is in the format defined in this | |
88 | * standard. Response data format values less than 2h are | |
89 | * obsolete. Response data format values greater than 2h are | |
90 | * reserved. | |
91 | */ | |
92 | buf[3] = 2; | |
93 | ||
94 | /* | |
95 | * Enable SCCS and TPGS fields for Emulated ALUA | |
96 | */ | |
c87fbd56 | 97 | spc_fill_alua_data(lun->lun_sep, buf); |
1fd032ee | 98 | |
d397a445 NB |
99 | /* |
100 | * Set Third-Party Copy (3PC) bit to indicate support for EXTENDED_COPY | |
101 | */ | |
102 | if (dev->dev_attrib.emulate_3pc) | |
103 | buf[5] |= 0x8; | |
bdbad2bd | 104 | /* |
d2c5304c NB |
105 | * Set Protection (PROTECT) bit when DIF has been enabled on the |
106 | * device, and the transport supports VERIFY + PASS. | |
bdbad2bd | 107 | */ |
d2c5304c NB |
108 | if (sess->sup_prot_ops & (TARGET_PROT_DIN_PASS | TARGET_PROT_DOUT_PASS)) { |
109 | if (dev->dev_attrib.pi_prot_type) | |
110 | buf[5] |= 0x1; | |
111 | } | |
d397a445 | 112 | |
1fd032ee CH |
113 | buf[7] = 0x2; /* CmdQue=1 */ |
114 | ||
ee60bddb NB |
115 | memcpy(&buf[8], "LIO-ORG ", 8); |
116 | memset(&buf[16], 0x20, 16); | |
117 | memcpy(&buf[16], dev->t10_wwn.model, | |
118 | min_t(size_t, strlen(dev->t10_wwn.model), 16)); | |
119 | memcpy(&buf[32], dev->t10_wwn.revision, | |
120 | min_t(size_t, strlen(dev->t10_wwn.revision), 4)); | |
1fd032ee CH |
121 | buf[4] = 31; /* Set additional length to 31 */ |
122 | ||
123 | return 0; | |
124 | } | |
0dfa1c5d | 125 | EXPORT_SYMBOL(spc_emulate_inquiry_std); |
1fd032ee CH |
126 | |
127 | /* unit serial number */ | |
de103c93 CH |
128 | static sense_reason_t |
129 | spc_emulate_evpd_80(struct se_cmd *cmd, unsigned char *buf) | |
1fd032ee CH |
130 | { |
131 | struct se_device *dev = cmd->se_dev; | |
9aff64e1 | 132 | u16 len; |
1fd032ee | 133 | |
0fd97ccf | 134 | if (dev->dev_flags & DF_EMULATED_VPD_UNIT_SERIAL) { |
9aff64e1 | 135 | len = sprintf(&buf[4], "%s", dev->t10_wwn.unit_serial); |
1fd032ee CH |
136 | len++; /* Extra Byte for NULL Terminator */ |
137 | buf[3] = len; | |
138 | } | |
139 | return 0; | |
140 | } | |
141 | ||
68366026 NB |
142 | void spc_parse_naa_6h_vendor_specific(struct se_device *dev, |
143 | unsigned char *buf) | |
1fd032ee | 144 | { |
0fd97ccf | 145 | unsigned char *p = &dev->t10_wwn.unit_serial[0]; |
1fd032ee CH |
146 | int cnt; |
147 | bool next = true; | |
148 | ||
149 | /* | |
150 | * Generate up to 36 bits of VENDOR SPECIFIC IDENTIFIER starting on | |
151 | * byte 3 bit 3-0 for NAA IEEE Registered Extended DESIGNATOR field | |
152 | * format, followed by 64 bits of VENDOR SPECIFIC IDENTIFIER EXTENSION | |
153 | * to complete the payload. These are based from VPD=0x80 PRODUCT SERIAL | |
154 | * NUMBER set via vpd_unit_serial in target_core_configfs.c to ensure | |
155 | * per device uniqeness. | |
156 | */ | |
157 | for (cnt = 0; *p && cnt < 13; p++) { | |
158 | int val = hex_to_bin(*p); | |
159 | ||
160 | if (val < 0) | |
161 | continue; | |
162 | ||
163 | if (next) { | |
164 | next = false; | |
165 | buf[cnt++] |= val; | |
166 | } else { | |
167 | next = true; | |
168 | buf[cnt] = val << 4; | |
169 | } | |
170 | } | |
171 | } | |
172 | ||
173 | /* | |
174 | * Device identification VPD, for a complete list of | |
175 | * DESIGNATOR TYPEs see spc4r17 Table 459. | |
176 | */ | |
0dfa1c5d | 177 | sense_reason_t |
de103c93 | 178 | spc_emulate_evpd_83(struct se_cmd *cmd, unsigned char *buf) |
1fd032ee CH |
179 | { |
180 | struct se_device *dev = cmd->se_dev; | |
181 | struct se_lun *lun = cmd->se_lun; | |
182 | struct se_port *port = NULL; | |
183 | struct se_portal_group *tpg = NULL; | |
184 | struct t10_alua_lu_gp_member *lu_gp_mem; | |
185 | struct t10_alua_tg_pt_gp *tg_pt_gp; | |
186 | struct t10_alua_tg_pt_gp_member *tg_pt_gp_mem; | |
0fd97ccf | 187 | unsigned char *prod = &dev->t10_wwn.model[0]; |
1fd032ee CH |
188 | u32 prod_len; |
189 | u32 unit_serial_len, off = 0; | |
190 | u16 len = 0, id_len; | |
191 | ||
192 | off = 4; | |
193 | ||
194 | /* | |
195 | * NAA IEEE Registered Extended Assigned designator format, see | |
196 | * spc4r17 section 7.7.3.6.5 | |
197 | * | |
198 | * We depend upon a target_core_mod/ConfigFS provided | |
199 | * /sys/kernel/config/target/core/$HBA/$DEV/wwn/vpd_unit_serial | |
200 | * value in order to return the NAA id. | |
201 | */ | |
0fd97ccf | 202 | if (!(dev->dev_flags & DF_EMULATED_VPD_UNIT_SERIAL)) |
1fd032ee CH |
203 | goto check_t10_vend_desc; |
204 | ||
205 | /* CODE SET == Binary */ | |
206 | buf[off++] = 0x1; | |
207 | ||
208 | /* Set ASSOCIATION == addressed logical unit: 0)b */ | |
209 | buf[off] = 0x00; | |
210 | ||
211 | /* Identifier/Designator type == NAA identifier */ | |
212 | buf[off++] |= 0x3; | |
213 | off++; | |
214 | ||
215 | /* Identifier/Designator length */ | |
216 | buf[off++] = 0x10; | |
217 | ||
218 | /* | |
219 | * Start NAA IEEE Registered Extended Identifier/Designator | |
220 | */ | |
221 | buf[off++] = (0x6 << 4); | |
222 | ||
223 | /* | |
224 | * Use OpenFabrics IEEE Company ID: 00 14 05 | |
225 | */ | |
226 | buf[off++] = 0x01; | |
227 | buf[off++] = 0x40; | |
228 | buf[off] = (0x5 << 4); | |
229 | ||
230 | /* | |
231 | * Return ConfigFS Unit Serial Number information for | |
232 | * VENDOR_SPECIFIC_IDENTIFIER and | |
233 | * VENDOR_SPECIFIC_IDENTIFIER_EXTENTION | |
234 | */ | |
235 | spc_parse_naa_6h_vendor_specific(dev, &buf[off]); | |
236 | ||
237 | len = 20; | |
238 | off = (len + 4); | |
239 | ||
240 | check_t10_vend_desc: | |
241 | /* | |
242 | * T10 Vendor Identifier Page, see spc4r17 section 7.7.3.4 | |
243 | */ | |
244 | id_len = 8; /* For Vendor field */ | |
245 | prod_len = 4; /* For VPD Header */ | |
246 | prod_len += 8; /* For Vendor field */ | |
247 | prod_len += strlen(prod); | |
248 | prod_len++; /* For : */ | |
249 | ||
0fd97ccf CH |
250 | if (dev->dev_flags & DF_EMULATED_VPD_UNIT_SERIAL) { |
251 | unit_serial_len = strlen(&dev->t10_wwn.unit_serial[0]); | |
1fd032ee CH |
252 | unit_serial_len++; /* For NULL Terminator */ |
253 | ||
254 | id_len += sprintf(&buf[off+12], "%s:%s", prod, | |
0fd97ccf | 255 | &dev->t10_wwn.unit_serial[0]); |
1fd032ee CH |
256 | } |
257 | buf[off] = 0x2; /* ASCII */ | |
258 | buf[off+1] = 0x1; /* T10 Vendor ID */ | |
259 | buf[off+2] = 0x0; | |
260 | memcpy(&buf[off+4], "LIO-ORG", 8); | |
261 | /* Extra Byte for NULL Terminator */ | |
262 | id_len++; | |
263 | /* Identifier Length */ | |
264 | buf[off+3] = id_len; | |
265 | /* Header size for Designation descriptor */ | |
266 | len += (id_len + 4); | |
267 | off += (id_len + 4); | |
268 | /* | |
269 | * struct se_port is only set for INQUIRY VPD=1 through $FABRIC_MOD | |
270 | */ | |
271 | port = lun->lun_sep; | |
272 | if (port) { | |
273 | struct t10_alua_lu_gp *lu_gp; | |
fbfe858f | 274 | u32 padding, scsi_name_len, scsi_target_len; |
1fd032ee CH |
275 | u16 lu_gp_id = 0; |
276 | u16 tg_pt_gp_id = 0; | |
277 | u16 tpgt; | |
278 | ||
279 | tpg = port->sep_tpg; | |
280 | /* | |
281 | * Relative target port identifer, see spc4r17 | |
282 | * section 7.7.3.7 | |
283 | * | |
284 | * Get the PROTOCOL IDENTIFIER as defined by spc4r17 | |
285 | * section 7.5.1 Table 362 | |
286 | */ | |
287 | buf[off] = | |
288 | (tpg->se_tpg_tfo->get_fabric_proto_ident(tpg) << 4); | |
289 | buf[off++] |= 0x1; /* CODE SET == Binary */ | |
290 | buf[off] = 0x80; /* Set PIV=1 */ | |
291 | /* Set ASSOCIATION == target port: 01b */ | |
292 | buf[off] |= 0x10; | |
293 | /* DESIGNATOR TYPE == Relative target port identifer */ | |
294 | buf[off++] |= 0x4; | |
295 | off++; /* Skip over Reserved */ | |
296 | buf[off++] = 4; /* DESIGNATOR LENGTH */ | |
297 | /* Skip over Obsolete field in RTPI payload | |
298 | * in Table 472 */ | |
299 | off += 2; | |
300 | buf[off++] = ((port->sep_rtpi >> 8) & 0xff); | |
301 | buf[off++] = (port->sep_rtpi & 0xff); | |
302 | len += 8; /* Header size + Designation descriptor */ | |
303 | /* | |
304 | * Target port group identifier, see spc4r17 | |
305 | * section 7.7.3.8 | |
306 | * | |
307 | * Get the PROTOCOL IDENTIFIER as defined by spc4r17 | |
308 | * section 7.5.1 Table 362 | |
309 | */ | |
1fd032ee CH |
310 | tg_pt_gp_mem = port->sep_alua_tg_pt_gp_mem; |
311 | if (!tg_pt_gp_mem) | |
312 | goto check_lu_gp; | |
313 | ||
314 | spin_lock(&tg_pt_gp_mem->tg_pt_gp_mem_lock); | |
315 | tg_pt_gp = tg_pt_gp_mem->tg_pt_gp; | |
316 | if (!tg_pt_gp) { | |
317 | spin_unlock(&tg_pt_gp_mem->tg_pt_gp_mem_lock); | |
318 | goto check_lu_gp; | |
319 | } | |
320 | tg_pt_gp_id = tg_pt_gp->tg_pt_gp_id; | |
321 | spin_unlock(&tg_pt_gp_mem->tg_pt_gp_mem_lock); | |
322 | ||
323 | buf[off] = | |
324 | (tpg->se_tpg_tfo->get_fabric_proto_ident(tpg) << 4); | |
325 | buf[off++] |= 0x1; /* CODE SET == Binary */ | |
326 | buf[off] = 0x80; /* Set PIV=1 */ | |
327 | /* Set ASSOCIATION == target port: 01b */ | |
328 | buf[off] |= 0x10; | |
329 | /* DESIGNATOR TYPE == Target port group identifier */ | |
330 | buf[off++] |= 0x5; | |
331 | off++; /* Skip over Reserved */ | |
332 | buf[off++] = 4; /* DESIGNATOR LENGTH */ | |
333 | off += 2; /* Skip over Reserved Field */ | |
334 | buf[off++] = ((tg_pt_gp_id >> 8) & 0xff); | |
335 | buf[off++] = (tg_pt_gp_id & 0xff); | |
336 | len += 8; /* Header size + Designation descriptor */ | |
337 | /* | |
338 | * Logical Unit Group identifier, see spc4r17 | |
339 | * section 7.7.3.8 | |
340 | */ | |
341 | check_lu_gp: | |
342 | lu_gp_mem = dev->dev_alua_lu_gp_mem; | |
343 | if (!lu_gp_mem) | |
344 | goto check_scsi_name; | |
345 | ||
346 | spin_lock(&lu_gp_mem->lu_gp_mem_lock); | |
347 | lu_gp = lu_gp_mem->lu_gp; | |
348 | if (!lu_gp) { | |
349 | spin_unlock(&lu_gp_mem->lu_gp_mem_lock); | |
350 | goto check_scsi_name; | |
351 | } | |
352 | lu_gp_id = lu_gp->lu_gp_id; | |
353 | spin_unlock(&lu_gp_mem->lu_gp_mem_lock); | |
354 | ||
355 | buf[off++] |= 0x1; /* CODE SET == Binary */ | |
356 | /* DESIGNATOR TYPE == Logical Unit Group identifier */ | |
357 | buf[off++] |= 0x6; | |
358 | off++; /* Skip over Reserved */ | |
359 | buf[off++] = 4; /* DESIGNATOR LENGTH */ | |
360 | off += 2; /* Skip over Reserved Field */ | |
361 | buf[off++] = ((lu_gp_id >> 8) & 0xff); | |
362 | buf[off++] = (lu_gp_id & 0xff); | |
363 | len += 8; /* Header size + Designation descriptor */ | |
364 | /* | |
365 | * SCSI name string designator, see spc4r17 | |
366 | * section 7.7.3.11 | |
367 | * | |
368 | * Get the PROTOCOL IDENTIFIER as defined by spc4r17 | |
369 | * section 7.5.1 Table 362 | |
370 | */ | |
371 | check_scsi_name: | |
1fd032ee CH |
372 | buf[off] = |
373 | (tpg->se_tpg_tfo->get_fabric_proto_ident(tpg) << 4); | |
374 | buf[off++] |= 0x3; /* CODE SET == UTF-8 */ | |
375 | buf[off] = 0x80; /* Set PIV=1 */ | |
376 | /* Set ASSOCIATION == target port: 01b */ | |
377 | buf[off] |= 0x10; | |
378 | /* DESIGNATOR TYPE == SCSI name string */ | |
379 | buf[off++] |= 0x8; | |
380 | off += 2; /* Skip over Reserved and length */ | |
381 | /* | |
382 | * SCSI name string identifer containing, $FABRIC_MOD | |
383 | * dependent information. For LIO-Target and iSCSI | |
384 | * Target Port, this means "<iSCSI name>,t,0x<TPGT> in | |
385 | * UTF-8 encoding. | |
386 | */ | |
387 | tpgt = tpg->se_tpg_tfo->tpg_get_tag(tpg); | |
388 | scsi_name_len = sprintf(&buf[off], "%s,t,0x%04x", | |
389 | tpg->se_tpg_tfo->tpg_get_wwn(tpg), tpgt); | |
390 | scsi_name_len += 1 /* Include NULL terminator */; | |
391 | /* | |
392 | * The null-terminated, null-padded (see 4.4.2) SCSI | |
393 | * NAME STRING field contains a UTF-8 format string. | |
394 | * The number of bytes in the SCSI NAME STRING field | |
395 | * (i.e., the value in the DESIGNATOR LENGTH field) | |
396 | * shall be no larger than 256 and shall be a multiple | |
397 | * of four. | |
398 | */ | |
03ba84ca | 399 | padding = ((-scsi_name_len) & 3); |
1fd032ee CH |
400 | if (padding) |
401 | scsi_name_len += padding; | |
03ba84ca HR |
402 | if (scsi_name_len > 256) |
403 | scsi_name_len = 256; | |
1fd032ee CH |
404 | |
405 | buf[off-1] = scsi_name_len; | |
406 | off += scsi_name_len; | |
407 | /* Header size + Designation descriptor */ | |
408 | len += (scsi_name_len + 4); | |
fbfe858f HR |
409 | |
410 | /* | |
411 | * Target device designator | |
412 | */ | |
413 | buf[off] = | |
414 | (tpg->se_tpg_tfo->get_fabric_proto_ident(tpg) << 4); | |
415 | buf[off++] |= 0x3; /* CODE SET == UTF-8 */ | |
416 | buf[off] = 0x80; /* Set PIV=1 */ | |
417 | /* Set ASSOCIATION == target device: 10b */ | |
418 | buf[off] |= 0x20; | |
419 | /* DESIGNATOR TYPE == SCSI name string */ | |
420 | buf[off++] |= 0x8; | |
421 | off += 2; /* Skip over Reserved and length */ | |
422 | /* | |
423 | * SCSI name string identifer containing, $FABRIC_MOD | |
424 | * dependent information. For LIO-Target and iSCSI | |
425 | * Target Port, this means "<iSCSI name>" in | |
426 | * UTF-8 encoding. | |
427 | */ | |
428 | scsi_target_len = sprintf(&buf[off], "%s", | |
429 | tpg->se_tpg_tfo->tpg_get_wwn(tpg)); | |
430 | scsi_target_len += 1 /* Include NULL terminator */; | |
431 | /* | |
432 | * The null-terminated, null-padded (see 4.4.2) SCSI | |
433 | * NAME STRING field contains a UTF-8 format string. | |
434 | * The number of bytes in the SCSI NAME STRING field | |
435 | * (i.e., the value in the DESIGNATOR LENGTH field) | |
436 | * shall be no larger than 256 and shall be a multiple | |
437 | * of four. | |
438 | */ | |
439 | padding = ((-scsi_target_len) & 3); | |
440 | if (padding) | |
441 | scsi_target_len += padding; | |
6a16d7be RD |
442 | if (scsi_target_len > 256) |
443 | scsi_target_len = 256; | |
fbfe858f HR |
444 | |
445 | buf[off-1] = scsi_target_len; | |
446 | off += scsi_target_len; | |
447 | ||
448 | /* Header size + Designation descriptor */ | |
449 | len += (scsi_target_len + 4); | |
1fd032ee CH |
450 | } |
451 | buf[2] = ((len >> 8) & 0xff); | |
452 | buf[3] = (len & 0xff); /* Page Length for VPD 0x83 */ | |
453 | return 0; | |
454 | } | |
0dfa1c5d | 455 | EXPORT_SYMBOL(spc_emulate_evpd_83); |
1fd032ee CH |
456 | |
457 | /* Extended INQUIRY Data VPD Page */ | |
de103c93 CH |
458 | static sense_reason_t |
459 | spc_emulate_evpd_86(struct se_cmd *cmd, unsigned char *buf) | |
1fd032ee | 460 | { |
d0c8b259 | 461 | struct se_device *dev = cmd->se_dev; |
d2c5304c | 462 | struct se_session *sess = cmd->se_sess; |
d0c8b259 | 463 | |
1fd032ee | 464 | buf[3] = 0x3c; |
43bb95c7 NB |
465 | /* |
466 | * Set GRD_CHK + REF_CHK for TYPE1 protection, or GRD_CHK | |
467 | * only for TYPE3 protection. | |
468 | */ | |
d2c5304c NB |
469 | if (sess->sup_prot_ops & (TARGET_PROT_DIN_PASS | TARGET_PROT_DOUT_PASS)) { |
470 | if (dev->dev_attrib.pi_prot_type == TARGET_DIF_TYPE1_PROT) | |
471 | buf[4] = 0x5; | |
472 | else if (dev->dev_attrib.pi_prot_type == TARGET_DIF_TYPE3_PROT) | |
473 | buf[4] = 0x4; | |
474 | } | |
43bb95c7 | 475 | |
1fd032ee CH |
476 | /* Set HEADSUP, ORDSUP, SIMPSUP */ |
477 | buf[5] = 0x07; | |
478 | ||
479 | /* If WriteCache emulation is enabled, set V_SUP */ | |
9bc6548f | 480 | if (se_dev_check_wce(dev)) |
1fd032ee | 481 | buf[6] = 0x01; |
c66094bf HR |
482 | /* If an LBA map is present set R_SUP */ |
483 | spin_lock(&cmd->se_dev->t10_alua.lba_map_lock); | |
484 | if (!list_empty(&dev->t10_alua.lba_map_list)) | |
485 | buf[8] = 0x10; | |
486 | spin_unlock(&cmd->se_dev->t10_alua.lba_map_lock); | |
1fd032ee CH |
487 | return 0; |
488 | } | |
489 | ||
490 | /* Block Limits VPD page */ | |
de103c93 CH |
491 | static sense_reason_t |
492 | spc_emulate_evpd_b0(struct se_cmd *cmd, unsigned char *buf) | |
1fd032ee CH |
493 | { |
494 | struct se_device *dev = cmd->se_dev; | |
1fd032ee | 495 | int have_tp = 0; |
7f7caf6a | 496 | int opt, min; |
1fd032ee CH |
497 | |
498 | /* | |
499 | * Following spc3r22 section 6.5.3 Block Limits VPD page, when | |
500 | * emulate_tpu=1 or emulate_tpws=1 we will be expect a | |
501 | * different page length for Thin Provisioning. | |
502 | */ | |
0fd97ccf | 503 | if (dev->dev_attrib.emulate_tpu || dev->dev_attrib.emulate_tpws) |
1fd032ee CH |
504 | have_tp = 1; |
505 | ||
506 | buf[0] = dev->transport->get_device_type(dev); | |
507 | buf[3] = have_tp ? 0x3c : 0x10; | |
508 | ||
509 | /* Set WSNZ to 1 */ | |
510 | buf[4] = 0x01; | |
0123a9ec NB |
511 | /* |
512 | * Set MAXIMUM COMPARE AND WRITE LENGTH | |
513 | */ | |
514 | if (dev->dev_attrib.emulate_caw) | |
515 | buf[5] = 0x01; | |
1fd032ee CH |
516 | |
517 | /* | |
518 | * Set OPTIMAL TRANSFER LENGTH GRANULARITY | |
519 | */ | |
7f7caf6a AG |
520 | if (dev->transport->get_io_min && (min = dev->transport->get_io_min(dev))) |
521 | put_unaligned_be16(min / dev->dev_attrib.block_size, &buf[6]); | |
522 | else | |
523 | put_unaligned_be16(1, &buf[6]); | |
1fd032ee CH |
524 | |
525 | /* | |
526 | * Set MAXIMUM TRANSFER LENGTH | |
527 | */ | |
046ba642 | 528 | put_unaligned_be32(dev->dev_attrib.hw_max_sectors, &buf[8]); |
1fd032ee CH |
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) |
aa04dae4 | 637 | buf[5] |= 0x40 | 0x20; |
1fd032ee CH |
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]); | |
096b4995 | 651 | put_unaligned_be32(dev->t10_alua.lba_map_segment_multiplier, &buf[12]); |
c66094bf HR |
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; | |
2426bd45 | 703 | int len = 0; |
1fd032ee | 704 | |
f82f320e NB |
705 | buf = kzalloc(SE_INQUIRY_BUF, GFP_KERNEL); |
706 | if (!buf) { | |
707 | pr_err("Unable to allocate response buffer for INQUIRY\n"); | |
708 | return TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; | |
709 | } | |
dea5f099 | 710 | |
1fd032ee CH |
711 | if (dev == tpg->tpg_virt_lun0.lun_se_dev) |
712 | buf[0] = 0x3f; /* Not connected */ | |
713 | else | |
714 | buf[0] = dev->transport->get_device_type(dev); | |
715 | ||
716 | if (!(cdb[1] & 0x1)) { | |
717 | if (cdb[2]) { | |
718 | pr_err("INQUIRY with EVPD==0 but PAGE CODE=%02x\n", | |
719 | cdb[2]); | |
de103c93 | 720 | ret = TCM_INVALID_CDB_FIELD; |
1fd032ee CH |
721 | goto out; |
722 | } | |
723 | ||
724 | ret = spc_emulate_inquiry_std(cmd, buf); | |
2426bd45 | 725 | len = buf[4] + 5; |
1fd032ee CH |
726 | goto out; |
727 | } | |
728 | ||
729 | for (p = 0; p < ARRAY_SIZE(evpd_handlers); ++p) { | |
730 | if (cdb[2] == evpd_handlers[p].page) { | |
731 | buf[1] = cdb[2]; | |
732 | ret = evpd_handlers[p].emulate(cmd, buf); | |
2426bd45 | 733 | len = get_unaligned_be16(&buf[2]) + 4; |
1fd032ee CH |
734 | goto out; |
735 | } | |
736 | } | |
737 | ||
738 | pr_err("Unknown VPD Code: 0x%02x\n", cdb[2]); | |
de103c93 | 739 | ret = TCM_INVALID_CDB_FIELD; |
1fd032ee CH |
740 | |
741 | out: | |
ffe7b0e9 | 742 | rbuf = transport_kmap_data_sg(cmd); |
49df9fc9 | 743 | if (rbuf) { |
f82f320e | 744 | memcpy(rbuf, buf, min_t(u32, SE_INQUIRY_BUF, cmd->data_length)); |
49df9fc9 NB |
745 | transport_kunmap_data_sg(cmd); |
746 | } | |
f82f320e | 747 | kfree(buf); |
1fd032ee CH |
748 | |
749 | if (!ret) | |
2426bd45 | 750 | target_complete_cmd_with_length(cmd, GOOD, len); |
1fd032ee CH |
751 | return ret; |
752 | } | |
753 | ||
d45aca42 | 754 | static int spc_modesense_rwrecovery(struct se_cmd *cmd, u8 pc, u8 *p) |
1fd032ee CH |
755 | { |
756 | p[0] = 0x01; | |
757 | p[1] = 0x0a; | |
758 | ||
d4b2b867 RD |
759 | /* No changeable values for now */ |
760 | if (pc == 1) | |
761 | goto out; | |
762 | ||
763 | out: | |
1fd032ee CH |
764 | return 12; |
765 | } | |
766 | ||
d45aca42 | 767 | static int spc_modesense_control(struct se_cmd *cmd, u8 pc, u8 *p) |
1fd032ee | 768 | { |
d45aca42 NB |
769 | struct se_device *dev = cmd->se_dev; |
770 | struct se_session *sess = cmd->se_sess; | |
771 | ||
1fd032ee CH |
772 | p[0] = 0x0a; |
773 | p[1] = 0x0a; | |
d4b2b867 RD |
774 | |
775 | /* No changeable values for now */ | |
776 | if (pc == 1) | |
777 | goto out; | |
778 | ||
1fd032ee CH |
779 | p[2] = 2; |
780 | /* | |
781 | * From spc4r23, 7.4.7 Control mode page | |
782 | * | |
783 | * The QUEUE ALGORITHM MODIFIER field (see table 368) specifies | |
784 | * restrictions on the algorithm used for reordering commands | |
785 | * having the SIMPLE task attribute (see SAM-4). | |
786 | * | |
787 | * Table 368 -- QUEUE ALGORITHM MODIFIER field | |
788 | * Code Description | |
789 | * 0h Restricted reordering | |
790 | * 1h Unrestricted reordering allowed | |
791 | * 2h to 7h Reserved | |
792 | * 8h to Fh Vendor specific | |
793 | * | |
794 | * A value of zero in the QUEUE ALGORITHM MODIFIER field specifies that | |
795 | * the device server shall order the processing sequence of commands | |
796 | * having the SIMPLE task attribute such that data integrity is maintained | |
797 | * for that I_T nexus (i.e., if the transmission of new SCSI transport protocol | |
798 | * requests is halted at any time, the final value of all data observable | |
799 | * on the medium shall be the same as if all the commands had been processed | |
800 | * with the ORDERED task attribute). | |
801 | * | |
802 | * A value of one in the QUEUE ALGORITHM MODIFIER field specifies that the | |
803 | * device server may reorder the processing sequence of commands having the | |
804 | * SIMPLE task attribute in any manner. Any data integrity exposures related to | |
805 | * command sequence order shall be explicitly handled by the application client | |
806 | * through the selection of appropriate ommands and task attributes. | |
807 | */ | |
0fd97ccf | 808 | p[3] = (dev->dev_attrib.emulate_rest_reord == 1) ? 0x00 : 0x10; |
1fd032ee CH |
809 | /* |
810 | * From spc4r17, section 7.4.6 Control mode Page | |
811 | * | |
812 | * Unit Attention interlocks control (UN_INTLCK_CTRL) to code 00b | |
813 | * | |
814 | * 00b: The logical unit shall 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 a com- | |
817 | * mand is completed with BUSY, TASK SET FULL, or RESERVATION CONFLICT | |
818 | * status. | |
819 | * | |
820 | * 10b: 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 not establish a unit attention condition when | |
823 | * a command is completed with BUSY, TASK SET FULL, or RESERVATION | |
824 | * CONFLICT status. | |
825 | * | |
826 | * 11b a The logical unit shall not clear any unit attention condition | |
827 | * reported in the same I_T_L_Q nexus transaction as a CHECK CONDITION | |
828 | * status and shall establish a unit attention condition for the | |
829 | * initiator port associated with the I_T nexus on which the BUSY, | |
830 | * TASK SET FULL, or RESERVATION CONFLICT status is being returned. | |
831 | * Depending on the status, the additional sense code shall be set to | |
832 | * PREVIOUS BUSY STATUS, PREVIOUS TASK SET FULL STATUS, or PREVIOUS | |
833 | * RESERVATION CONFLICT STATUS. Until it is cleared by a REQUEST SENSE | |
834 | * command, a unit attention condition shall be established only once | |
835 | * for a BUSY, TASK SET FULL, or RESERVATION CONFLICT status regardless | |
836 | * to the number of commands completed with one of those status codes. | |
837 | */ | |
0fd97ccf CH |
838 | p[4] = (dev->dev_attrib.emulate_ua_intlck_ctrl == 2) ? 0x30 : |
839 | (dev->dev_attrib.emulate_ua_intlck_ctrl == 1) ? 0x20 : 0x00; | |
1fd032ee CH |
840 | /* |
841 | * From spc4r17, section 7.4.6 Control mode Page | |
842 | * | |
843 | * Task Aborted Status (TAS) bit set to zero. | |
844 | * | |
845 | * A task aborted status (TAS) bit set to zero specifies that aborted | |
846 | * tasks shall be terminated by the device server without any response | |
847 | * to the application client. A TAS bit set to one specifies that tasks | |
848 | * aborted by the actions of an I_T nexus other than the I_T nexus on | |
849 | * which the command was received shall be completed with TASK ABORTED | |
850 | * status (see SAM-4). | |
851 | */ | |
0fd97ccf | 852 | p[5] = (dev->dev_attrib.emulate_tas) ? 0x40 : 0x00; |
0c30f421 NB |
853 | /* |
854 | * From spc4r30, section 7.5.7 Control mode page | |
855 | * | |
856 | * Application Tag Owner (ATO) bit set to one. | |
857 | * | |
858 | * If the ATO bit is set to one the device server shall not modify the | |
859 | * LOGICAL BLOCK APPLICATION TAG field and, depending on the protection | |
860 | * type, shall not modify the contents of the LOGICAL BLOCK REFERENCE | |
861 | * TAG field. | |
862 | */ | |
d45aca42 NB |
863 | if (sess->sup_prot_ops & (TARGET_PROT_DIN_PASS | TARGET_PROT_DOUT_PASS)) { |
864 | if (dev->dev_attrib.pi_prot_type) | |
865 | p[5] |= 0x80; | |
866 | } | |
0c30f421 | 867 | |
1fd032ee CH |
868 | p[8] = 0xff; |
869 | p[9] = 0xff; | |
870 | p[11] = 30; | |
871 | ||
d4b2b867 | 872 | out: |
1fd032ee CH |
873 | return 12; |
874 | } | |
875 | ||
d45aca42 | 876 | static int spc_modesense_caching(struct se_cmd *cmd, u8 pc, u8 *p) |
1fd032ee | 877 | { |
d45aca42 NB |
878 | struct se_device *dev = cmd->se_dev; |
879 | ||
1fd032ee CH |
880 | p[0] = 0x08; |
881 | p[1] = 0x12; | |
d4b2b867 RD |
882 | |
883 | /* No changeable values for now */ | |
884 | if (pc == 1) | |
885 | goto out; | |
886 | ||
9bc6548f | 887 | if (se_dev_check_wce(dev)) |
1fd032ee CH |
888 | p[2] = 0x04; /* Write Cache Enable */ |
889 | p[12] = 0x20; /* Disabled Read Ahead */ | |
890 | ||
d4b2b867 | 891 | out: |
1fd032ee CH |
892 | return 20; |
893 | } | |
894 | ||
d45aca42 | 895 | static int spc_modesense_informational_exceptions(struct se_cmd *cmd, u8 pc, unsigned char *p) |
0f6d64ce RD |
896 | { |
897 | p[0] = 0x1c; | |
898 | p[1] = 0x0a; | |
899 | ||
900 | /* No changeable values for now */ | |
901 | if (pc == 1) | |
902 | goto out; | |
903 | ||
904 | out: | |
905 | return 12; | |
906 | } | |
907 | ||
d4b2b867 RD |
908 | static struct { |
909 | uint8_t page; | |
910 | uint8_t subpage; | |
d45aca42 | 911 | int (*emulate)(struct se_cmd *, u8, unsigned char *); |
d4b2b867 RD |
912 | } modesense_handlers[] = { |
913 | { .page = 0x01, .subpage = 0x00, .emulate = spc_modesense_rwrecovery }, | |
914 | { .page = 0x08, .subpage = 0x00, .emulate = spc_modesense_caching }, | |
915 | { .page = 0x0a, .subpage = 0x00, .emulate = spc_modesense_control }, | |
0f6d64ce | 916 | { .page = 0x1c, .subpage = 0x00, .emulate = spc_modesense_informational_exceptions }, |
d4b2b867 RD |
917 | }; |
918 | ||
1fd032ee CH |
919 | static void spc_modesense_write_protect(unsigned char *buf, int type) |
920 | { | |
921 | /* | |
922 | * I believe that the WP bit (bit 7) in the mode header is the same for | |
923 | * all device types.. | |
924 | */ | |
925 | switch (type) { | |
926 | case TYPE_DISK: | |
927 | case TYPE_TAPE: | |
928 | default: | |
929 | buf[0] |= 0x80; /* WP bit */ | |
930 | break; | |
931 | } | |
932 | } | |
933 | ||
934 | static void spc_modesense_dpofua(unsigned char *buf, int type) | |
935 | { | |
936 | switch (type) { | |
937 | case TYPE_DISK: | |
938 | buf[0] |= 0x10; /* DPOFUA bit */ | |
939 | break; | |
940 | default: | |
941 | break; | |
942 | } | |
943 | } | |
944 | ||
d4b2b867 RD |
945 | static int spc_modesense_blockdesc(unsigned char *buf, u64 blocks, u32 block_size) |
946 | { | |
947 | *buf++ = 8; | |
948 | put_unaligned_be32(min(blocks, 0xffffffffull), buf); | |
949 | buf += 4; | |
950 | put_unaligned_be32(block_size, buf); | |
951 | return 9; | |
952 | } | |
953 | ||
954 | static int spc_modesense_long_blockdesc(unsigned char *buf, u64 blocks, u32 block_size) | |
955 | { | |
956 | if (blocks <= 0xffffffff) | |
957 | return spc_modesense_blockdesc(buf + 3, blocks, block_size) + 3; | |
958 | ||
959 | *buf++ = 1; /* LONGLBA */ | |
960 | buf += 2; | |
961 | *buf++ = 16; | |
962 | put_unaligned_be64(blocks, buf); | |
963 | buf += 12; | |
964 | put_unaligned_be32(block_size, buf); | |
965 | ||
966 | return 17; | |
967 | } | |
968 | ||
de103c93 | 969 | static sense_reason_t spc_emulate_modesense(struct se_cmd *cmd) |
1fd032ee CH |
970 | { |
971 | struct se_device *dev = cmd->se_dev; | |
972 | char *cdb = cmd->t_task_cdb; | |
cab9609b | 973 | unsigned char buf[SE_MODE_PAGE_BUF], *rbuf; |
1fd032ee CH |
974 | int type = dev->transport->get_device_type(dev); |
975 | int ten = (cmd->t_task_cdb[0] == MODE_SENSE_10); | |
d4b2b867 RD |
976 | bool dbd = !!(cdb[1] & 0x08); |
977 | bool llba = ten ? !!(cdb[1] & 0x10) : false; | |
978 | u8 pc = cdb[2] >> 6; | |
979 | u8 page = cdb[2] & 0x3f; | |
980 | u8 subpage = cdb[3]; | |
1fd032ee | 981 | int length = 0; |
d4b2b867 RD |
982 | int ret; |
983 | int i; | |
1fd032ee | 984 | |
cab9609b NB |
985 | memset(buf, 0, SE_MODE_PAGE_BUF); |
986 | ||
fecae40a NB |
987 | /* |
988 | * Skip over MODE DATA LENGTH + MEDIUM TYPE fields to byte 3 for | |
989 | * MODE_SENSE_10 and byte 2 for MODE_SENSE (6). | |
990 | */ | |
991 | length = ten ? 3 : 2; | |
d4b2b867 RD |
992 | |
993 | /* DEVICE-SPECIFIC PARAMETER */ | |
994 | if ((cmd->se_lun->lun_access & TRANSPORT_LUNFLAGS_READ_ONLY) || | |
995 | (cmd->se_deve && | |
996 | (cmd->se_deve->lun_flags & TRANSPORT_LUNFLAGS_READ_ONLY))) | |
997 | spc_modesense_write_protect(&buf[length], type); | |
998 | ||
9bc6548f | 999 | if ((se_dev_check_wce(dev)) && |
d4b2b867 RD |
1000 | (dev->dev_attrib.emulate_fua_write > 0)) |
1001 | spc_modesense_dpofua(&buf[length], type); | |
1002 | ||
1003 | ++length; | |
1004 | ||
1005 | /* BLOCK DESCRIPTOR */ | |
1006 | ||
1007 | /* | |
1008 | * For now we only include a block descriptor for disk (SBC) | |
1009 | * devices; other command sets use a slightly different format. | |
1010 | */ | |
1011 | if (!dbd && type == TYPE_DISK) { | |
1012 | u64 blocks = dev->transport->get_blocks(dev); | |
1013 | u32 block_size = dev->dev_attrib.block_size; | |
1014 | ||
1015 | if (ten) { | |
1016 | if (llba) { | |
1017 | length += spc_modesense_long_blockdesc(&buf[length], | |
1018 | blocks, block_size); | |
1019 | } else { | |
1020 | length += 3; | |
1021 | length += spc_modesense_blockdesc(&buf[length], | |
1022 | blocks, block_size); | |
1023 | } | |
1024 | } else { | |
1025 | length += spc_modesense_blockdesc(&buf[length], blocks, | |
1026 | block_size); | |
1027 | } | |
1fd032ee | 1028 | } else { |
d4b2b867 RD |
1029 | if (ten) |
1030 | length += 4; | |
1031 | else | |
1032 | length += 1; | |
1fd032ee CH |
1033 | } |
1034 | ||
d4b2b867 RD |
1035 | if (page == 0x3f) { |
1036 | if (subpage != 0x00 && subpage != 0xff) { | |
de103c93 | 1037 | pr_warn("MODE_SENSE: Invalid subpage code: 0x%02x\n", subpage); |
de103c93 | 1038 | return TCM_INVALID_CDB_FIELD; |
d4b2b867 RD |
1039 | } |
1040 | ||
1041 | for (i = 0; i < ARRAY_SIZE(modesense_handlers); ++i) { | |
1042 | /* | |
1043 | * Tricky way to say all subpage 00h for | |
1044 | * subpage==0, all subpages for subpage==0xff | |
1045 | * (and we just checked above that those are | |
1046 | * the only two possibilities). | |
1047 | */ | |
1048 | if ((modesense_handlers[i].subpage & ~subpage) == 0) { | |
d45aca42 | 1049 | ret = modesense_handlers[i].emulate(cmd, pc, &buf[length]); |
d4b2b867 RD |
1050 | if (!ten && length + ret >= 255) |
1051 | break; | |
1052 | length += ret; | |
1053 | } | |
1054 | } | |
1055 | ||
1056 | goto set_length; | |
1057 | } | |
1058 | ||
1059 | for (i = 0; i < ARRAY_SIZE(modesense_handlers); ++i) | |
1060 | if (modesense_handlers[i].page == page && | |
1061 | modesense_handlers[i].subpage == subpage) { | |
d45aca42 | 1062 | length += modesense_handlers[i].emulate(cmd, pc, &buf[length]); |
d4b2b867 RD |
1063 | goto set_length; |
1064 | } | |
1065 | ||
1066 | /* | |
1067 | * We don't intend to implement: | |
1068 | * - obsolete page 03h "format parameters" (checked by Solaris) | |
1069 | */ | |
1070 | if (page != 0x03) | |
1071 | pr_err("MODE SENSE: unimplemented page/subpage: 0x%02x/0x%02x\n", | |
1072 | page, subpage); | |
1073 | ||
de103c93 | 1074 | return TCM_UNKNOWN_MODE_PAGE; |
d4b2b867 RD |
1075 | |
1076 | set_length: | |
1077 | if (ten) | |
1078 | put_unaligned_be16(length - 2, buf); | |
1079 | else | |
1080 | buf[0] = length - 1; | |
1081 | ||
cab9609b NB |
1082 | rbuf = transport_kmap_data_sg(cmd); |
1083 | if (rbuf) { | |
1084 | memcpy(rbuf, buf, min_t(u32, SE_MODE_PAGE_BUF, cmd->data_length)); | |
1085 | transport_kunmap_data_sg(cmd); | |
7a3f369c | 1086 | } |
1fd032ee | 1087 | |
2426bd45 | 1088 | target_complete_cmd_with_length(cmd, GOOD, length); |
1fd032ee CH |
1089 | return 0; |
1090 | } | |
1091 | ||
de103c93 | 1092 | static sense_reason_t spc_emulate_modeselect(struct se_cmd *cmd) |
3a3c5e4a | 1093 | { |
3a3c5e4a RD |
1094 | char *cdb = cmd->t_task_cdb; |
1095 | bool ten = cdb[0] == MODE_SELECT_10; | |
1096 | int off = ten ? 8 : 4; | |
1097 | bool pf = !!(cdb[1] & 0x10); | |
1098 | u8 page, subpage; | |
1099 | unsigned char *buf; | |
1100 | unsigned char tbuf[SE_MODE_PAGE_BUF]; | |
1101 | int length; | |
1102 | int ret = 0; | |
1103 | int i; | |
1104 | ||
71f41fe1 RD |
1105 | if (!cmd->data_length) { |
1106 | target_complete_cmd(cmd, GOOD); | |
1107 | return 0; | |
1108 | } | |
1109 | ||
1110 | if (cmd->data_length < off + 2) | |
1111 | return TCM_PARAMETER_LIST_LENGTH_ERROR; | |
1112 | ||
3a3c5e4a | 1113 | buf = transport_kmap_data_sg(cmd); |
de103c93 CH |
1114 | if (!buf) |
1115 | return TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; | |
3a3c5e4a RD |
1116 | |
1117 | if (!pf) { | |
de103c93 | 1118 | ret = TCM_INVALID_CDB_FIELD; |
3a3c5e4a RD |
1119 | goto out; |
1120 | } | |
1121 | ||
1122 | page = buf[off] & 0x3f; | |
1123 | subpage = buf[off] & 0x40 ? buf[off + 1] : 0; | |
1124 | ||
1125 | for (i = 0; i < ARRAY_SIZE(modesense_handlers); ++i) | |
1126 | if (modesense_handlers[i].page == page && | |
1127 | modesense_handlers[i].subpage == subpage) { | |
1128 | memset(tbuf, 0, SE_MODE_PAGE_BUF); | |
d45aca42 | 1129 | length = modesense_handlers[i].emulate(cmd, 0, tbuf); |
3a3c5e4a RD |
1130 | goto check_contents; |
1131 | } | |
1132 | ||
de103c93 | 1133 | ret = TCM_UNKNOWN_MODE_PAGE; |
3a3c5e4a RD |
1134 | goto out; |
1135 | ||
1136 | check_contents: | |
71f41fe1 RD |
1137 | if (cmd->data_length < off + length) { |
1138 | ret = TCM_PARAMETER_LIST_LENGTH_ERROR; | |
1139 | goto out; | |
1140 | } | |
1141 | ||
de103c93 CH |
1142 | if (memcmp(buf + off, tbuf, length)) |
1143 | ret = TCM_INVALID_PARAMETER_LIST; | |
3a3c5e4a RD |
1144 | |
1145 | out: | |
1146 | transport_kunmap_data_sg(cmd); | |
1147 | ||
1148 | if (!ret) | |
1149 | target_complete_cmd(cmd, GOOD); | |
1150 | return ret; | |
1151 | } | |
1152 | ||
de103c93 | 1153 | static sense_reason_t spc_emulate_request_sense(struct se_cmd *cmd) |
1fd032ee CH |
1154 | { |
1155 | unsigned char *cdb = cmd->t_task_cdb; | |
32a8811f | 1156 | unsigned char *rbuf; |
1fd032ee | 1157 | u8 ua_asc = 0, ua_ascq = 0; |
32a8811f PB |
1158 | unsigned char buf[SE_SENSE_BUF]; |
1159 | ||
1160 | memset(buf, 0, SE_SENSE_BUF); | |
1fd032ee CH |
1161 | |
1162 | if (cdb[1] & 0x01) { | |
1163 | pr_err("REQUEST_SENSE description emulation not" | |
1164 | " supported\n"); | |
de103c93 | 1165 | return TCM_INVALID_CDB_FIELD; |
1fd032ee CH |
1166 | } |
1167 | ||
32a8811f | 1168 | rbuf = transport_kmap_data_sg(cmd); |
de103c93 CH |
1169 | if (!rbuf) |
1170 | return TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; | |
1171 | ||
1172 | if (!core_scsi3_ua_clear_for_request_sense(cmd, &ua_asc, &ua_ascq)) { | |
1fd032ee CH |
1173 | /* |
1174 | * CURRENT ERROR, UNIT ATTENTION | |
1175 | */ | |
1176 | buf[0] = 0x70; | |
1177 | buf[SPC_SENSE_KEY_OFFSET] = UNIT_ATTENTION; | |
1178 | ||
1fd032ee CH |
1179 | /* |
1180 | * The Additional Sense Code (ASC) from the UNIT ATTENTION | |
1181 | */ | |
1182 | buf[SPC_ASC_KEY_OFFSET] = ua_asc; | |
1183 | buf[SPC_ASCQ_KEY_OFFSET] = ua_ascq; | |
1184 | buf[7] = 0x0A; | |
1185 | } else { | |
1186 | /* | |
1187 | * CURRENT ERROR, NO SENSE | |
1188 | */ | |
1189 | buf[0] = 0x70; | |
1190 | buf[SPC_SENSE_KEY_OFFSET] = NO_SENSE; | |
1191 | ||
1fd032ee CH |
1192 | /* |
1193 | * NO ADDITIONAL SENSE INFORMATION | |
1194 | */ | |
1195 | buf[SPC_ASC_KEY_OFFSET] = 0x00; | |
1196 | buf[7] = 0x0A; | |
1197 | } | |
1198 | ||
de103c93 CH |
1199 | memcpy(rbuf, buf, min_t(u32, sizeof(buf), cmd->data_length)); |
1200 | transport_kunmap_data_sg(cmd); | |
32a8811f | 1201 | |
1fd032ee CH |
1202 | target_complete_cmd(cmd, GOOD); |
1203 | return 0; | |
1204 | } | |
1205 | ||
de103c93 | 1206 | sense_reason_t spc_emulate_report_luns(struct se_cmd *cmd) |
d1b1f805 CH |
1207 | { |
1208 | struct se_dev_entry *deve; | |
1209 | struct se_session *sess = cmd->se_sess; | |
1210 | unsigned char *buf; | |
1211 | u32 lun_count = 0, offset = 8, i; | |
1212 | ||
1213 | if (cmd->data_length < 16) { | |
1214 | pr_warn("REPORT LUNS allocation length %u too small\n", | |
1215 | cmd->data_length); | |
de103c93 | 1216 | return TCM_INVALID_CDB_FIELD; |
d1b1f805 CH |
1217 | } |
1218 | ||
1219 | buf = transport_kmap_data_sg(cmd); | |
1220 | if (!buf) | |
de103c93 | 1221 | return TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; |
d1b1f805 CH |
1222 | |
1223 | /* | |
1224 | * If no struct se_session pointer is present, this struct se_cmd is | |
1225 | * coming via a target_core_mod PASSTHROUGH op, and not through | |
1226 | * a $FABRIC_MOD. In that case, report LUN=0 only. | |
1227 | */ | |
1228 | if (!sess) { | |
1229 | int_to_scsilun(0, (struct scsi_lun *)&buf[offset]); | |
1230 | lun_count = 1; | |
1231 | goto done; | |
1232 | } | |
1233 | ||
1234 | spin_lock_irq(&sess->se_node_acl->device_list_lock); | |
1235 | for (i = 0; i < TRANSPORT_MAX_LUNS_PER_TPG; i++) { | |
1236 | deve = sess->se_node_acl->device_list[i]; | |
1237 | if (!(deve->lun_flags & TRANSPORT_LUNFLAGS_INITIATOR_ACCESS)) | |
1238 | continue; | |
1239 | /* | |
1240 | * We determine the correct LUN LIST LENGTH even once we | |
1241 | * have reached the initial allocation length. | |
1242 | * See SPC2-R20 7.19. | |
1243 | */ | |
1244 | lun_count++; | |
1245 | if ((offset + 8) > cmd->data_length) | |
1246 | continue; | |
1247 | ||
1248 | int_to_scsilun(deve->mapped_lun, (struct scsi_lun *)&buf[offset]); | |
1249 | offset += 8; | |
1250 | } | |
1251 | spin_unlock_irq(&sess->se_node_acl->device_list_lock); | |
1252 | ||
1253 | /* | |
1254 | * See SPC3 r07, page 159. | |
1255 | */ | |
1256 | done: | |
1257 | lun_count *= 8; | |
1258 | buf[0] = ((lun_count >> 24) & 0xff); | |
1259 | buf[1] = ((lun_count >> 16) & 0xff); | |
1260 | buf[2] = ((lun_count >> 8) & 0xff); | |
1261 | buf[3] = (lun_count & 0xff); | |
1262 | transport_kunmap_data_sg(cmd); | |
1263 | ||
2426bd45 | 1264 | target_complete_cmd_with_length(cmd, GOOD, 8 + lun_count * 8); |
d1b1f805 CH |
1265 | return 0; |
1266 | } | |
8de530a5 | 1267 | EXPORT_SYMBOL(spc_emulate_report_luns); |
d1b1f805 | 1268 | |
de103c93 CH |
1269 | static sense_reason_t |
1270 | spc_emulate_testunitready(struct se_cmd *cmd) | |
1fd032ee CH |
1271 | { |
1272 | target_complete_cmd(cmd, GOOD); | |
1273 | return 0; | |
1274 | } | |
1275 | ||
de103c93 CH |
1276 | sense_reason_t |
1277 | spc_parse_cdb(struct se_cmd *cmd, unsigned int *size) | |
88455ec4 | 1278 | { |
eba2ca45 | 1279 | struct se_device *dev = cmd->se_dev; |
88455ec4 CH |
1280 | unsigned char *cdb = cmd->t_task_cdb; |
1281 | ||
1282 | switch (cdb[0]) { | |
1283 | case MODE_SELECT: | |
1284 | *size = cdb[4]; | |
3a3c5e4a | 1285 | cmd->execute_cmd = spc_emulate_modeselect; |
88455ec4 CH |
1286 | break; |
1287 | case MODE_SELECT_10: | |
1288 | *size = (cdb[7] << 8) + cdb[8]; | |
3a3c5e4a | 1289 | cmd->execute_cmd = spc_emulate_modeselect; |
88455ec4 CH |
1290 | break; |
1291 | case MODE_SENSE: | |
1292 | *size = cdb[4]; | |
1fd032ee | 1293 | cmd->execute_cmd = spc_emulate_modesense; |
88455ec4 CH |
1294 | break; |
1295 | case MODE_SENSE_10: | |
1296 | *size = (cdb[7] << 8) + cdb[8]; | |
1fd032ee | 1297 | cmd->execute_cmd = spc_emulate_modesense; |
88455ec4 CH |
1298 | break; |
1299 | case LOG_SELECT: | |
1300 | case LOG_SENSE: | |
1301 | *size = (cdb[7] << 8) + cdb[8]; | |
1302 | break; | |
1303 | case PERSISTENT_RESERVE_IN: | |
88455ec4 | 1304 | *size = (cdb[7] << 8) + cdb[8]; |
d977f437 | 1305 | cmd->execute_cmd = target_scsi3_emulate_pr_in; |
88455ec4 CH |
1306 | break; |
1307 | case PERSISTENT_RESERVE_OUT: | |
88455ec4 | 1308 | *size = (cdb[7] << 8) + cdb[8]; |
d977f437 | 1309 | cmd->execute_cmd = target_scsi3_emulate_pr_out; |
88455ec4 CH |
1310 | break; |
1311 | case RELEASE: | |
1312 | case RELEASE_10: | |
1313 | if (cdb[0] == RELEASE_10) | |
1314 | *size = (cdb[7] << 8) | cdb[8]; | |
1315 | else | |
1316 | *size = cmd->data_length; | |
1317 | ||
d977f437 | 1318 | cmd->execute_cmd = target_scsi2_reservation_release; |
88455ec4 CH |
1319 | break; |
1320 | case RESERVE: | |
1321 | case RESERVE_10: | |
1322 | /* | |
1323 | * The SPC-2 RESERVE does not contain a size in the SCSI CDB. | |
1324 | * Assume the passthrough or $FABRIC_MOD will tell us about it. | |
1325 | */ | |
1326 | if (cdb[0] == RESERVE_10) | |
1327 | *size = (cdb[7] << 8) | cdb[8]; | |
1328 | else | |
1329 | *size = cmd->data_length; | |
1330 | ||
d977f437 | 1331 | cmd->execute_cmd = target_scsi2_reservation_reserve; |
88455ec4 CH |
1332 | break; |
1333 | case REQUEST_SENSE: | |
1334 | *size = cdb[4]; | |
1fd032ee | 1335 | cmd->execute_cmd = spc_emulate_request_sense; |
88455ec4 CH |
1336 | break; |
1337 | case INQUIRY: | |
1338 | *size = (cdb[3] << 8) + cdb[4]; | |
1339 | ||
1340 | /* | |
125d0119 | 1341 | * Do implicit HEAD_OF_QUEUE processing for INQUIRY. |
88455ec4 CH |
1342 | * See spc4r17 section 5.3 |
1343 | */ | |
68d81f40 | 1344 | cmd->sam_task_attr = TCM_HEAD_TAG; |
1fd032ee | 1345 | cmd->execute_cmd = spc_emulate_inquiry; |
88455ec4 CH |
1346 | break; |
1347 | case SECURITY_PROTOCOL_IN: | |
1348 | case SECURITY_PROTOCOL_OUT: | |
1349 | *size = (cdb[6] << 24) | (cdb[7] << 16) | (cdb[8] << 8) | cdb[9]; | |
1350 | break; | |
1351 | case EXTENDED_COPY: | |
04b1b795 NB |
1352 | *size = get_unaligned_be32(&cdb[10]); |
1353 | cmd->execute_cmd = target_do_xcopy; | |
1354 | break; | |
88455ec4 | 1355 | case RECEIVE_COPY_RESULTS: |
04b1b795 NB |
1356 | *size = get_unaligned_be32(&cdb[10]); |
1357 | cmd->execute_cmd = target_do_receive_copy_results; | |
1358 | break; | |
1359 | case READ_ATTRIBUTE: | |
88455ec4 CH |
1360 | case WRITE_ATTRIBUTE: |
1361 | *size = (cdb[10] << 24) | (cdb[11] << 16) | | |
1362 | (cdb[12] << 8) | cdb[13]; | |
1363 | break; | |
1364 | case RECEIVE_DIAGNOSTIC: | |
1365 | case SEND_DIAGNOSTIC: | |
1366 | *size = (cdb[3] << 8) | cdb[4]; | |
1367 | break; | |
1368 | case WRITE_BUFFER: | |
1369 | *size = (cdb[6] << 16) + (cdb[7] << 8) + cdb[8]; | |
1370 | break; | |
1371 | case REPORT_LUNS: | |
d1b1f805 | 1372 | cmd->execute_cmd = spc_emulate_report_luns; |
88455ec4 CH |
1373 | *size = (cdb[6] << 24) | (cdb[7] << 16) | (cdb[8] << 8) | cdb[9]; |
1374 | /* | |
125d0119 | 1375 | * Do implicit HEAD_OF_QUEUE processing for REPORT_LUNS |
88455ec4 CH |
1376 | * See spc4r17 section 5.3 |
1377 | */ | |
68d81f40 | 1378 | cmd->sam_task_attr = TCM_HEAD_TAG; |
88455ec4 CH |
1379 | break; |
1380 | case TEST_UNIT_READY: | |
1fd032ee | 1381 | cmd->execute_cmd = spc_emulate_testunitready; |
d6e0175c | 1382 | *size = 0; |
88455ec4 | 1383 | break; |
eba2ca45 NB |
1384 | case MAINTENANCE_IN: |
1385 | if (dev->transport->get_device_type(dev) != TYPE_ROM) { | |
1386 | /* | |
1387 | * MAINTENANCE_IN from SCC-2 | |
1388 | * Check for emulated MI_REPORT_TARGET_PGS | |
1389 | */ | |
c87fbd56 | 1390 | if ((cdb[1] & 0x1f) == MI_REPORT_TARGET_PGS) { |
eba2ca45 NB |
1391 | cmd->execute_cmd = |
1392 | target_emulate_report_target_port_groups; | |
1393 | } | |
1394 | *size = get_unaligned_be32(&cdb[6]); | |
1395 | } else { | |
1396 | /* | |
1397 | * GPCMD_SEND_KEY from multi media commands | |
1398 | */ | |
1399 | *size = get_unaligned_be16(&cdb[8]); | |
1400 | } | |
1401 | break; | |
1402 | case MAINTENANCE_OUT: | |
1403 | if (dev->transport->get_device_type(dev) != TYPE_ROM) { | |
1404 | /* | |
1405 | * MAINTENANCE_OUT from SCC-2 | |
1406 | * Check for emulated MO_SET_TARGET_PGS. | |
1407 | */ | |
c87fbd56 | 1408 | if (cdb[1] == MO_SET_TARGET_PGS) { |
eba2ca45 NB |
1409 | cmd->execute_cmd = |
1410 | target_emulate_set_target_port_groups; | |
1411 | } | |
1412 | *size = get_unaligned_be32(&cdb[6]); | |
1413 | } else { | |
1414 | /* | |
1415 | * GPCMD_SEND_KEY from multi media commands | |
1416 | */ | |
1417 | *size = get_unaligned_be16(&cdb[8]); | |
1418 | } | |
1419 | break; | |
88455ec4 CH |
1420 | default: |
1421 | pr_warn("TARGET_CORE[%s]: Unsupported SCSI Opcode" | |
1422 | " 0x%02x, sending CHECK_CONDITION.\n", | |
1423 | cmd->se_tfo->get_fabric_name(), cdb[0]); | |
de103c93 | 1424 | return TCM_UNSUPPORTED_SCSI_OPCODE; |
88455ec4 CH |
1425 | } |
1426 | ||
1427 | return 0; | |
1428 | } | |
1429 | EXPORT_SYMBOL(spc_parse_cdb); |