Commit | Line | Data |
---|---|---|
88455ec4 CH |
1 | /* |
2 | * SCSI Primary Commands (SPC) parsing and emulation. | |
3 | * | |
fd9a11d7 | 4 | * (c) Copyright 2002-2012 RisingTide Systems LLC. |
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" | |
38 | ||
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 | /* | |
51 | * Set TPGS field for explict and/or implict ALUA access type | |
52 | * and opteration. | |
53 | * | |
54 | * See spc4r17 section 6.4.2 Table 135 | |
55 | */ | |
56 | if (!port) | |
57 | return; | |
58 | tg_pt_gp_mem = port->sep_alua_tg_pt_gp_mem; | |
59 | if (!tg_pt_gp_mem) | |
60 | return; | |
61 | ||
62 | spin_lock(&tg_pt_gp_mem->tg_pt_gp_mem_lock); | |
63 | tg_pt_gp = tg_pt_gp_mem->tg_pt_gp; | |
64 | if (tg_pt_gp) | |
65 | buf[5] |= tg_pt_gp->tg_pt_gp_alua_access_type; | |
66 | spin_unlock(&tg_pt_gp_mem->tg_pt_gp_mem_lock); | |
67 | } | |
68 | ||
0dfa1c5d HR |
69 | sense_reason_t |
70 | spc_emulate_inquiry_std(struct se_cmd *cmd, unsigned char *buf) | |
1fd032ee CH |
71 | { |
72 | struct se_lun *lun = cmd->se_lun; | |
73 | struct se_device *dev = cmd->se_dev; | |
74 | ||
75 | /* Set RMB (removable media) for tape devices */ | |
76 | if (dev->transport->get_device_type(dev) == TYPE_TAPE) | |
77 | buf[1] = 0x80; | |
78 | ||
48c2567d | 79 | buf[2] = 0x05; /* SPC-3 */ |
1fd032ee CH |
80 | |
81 | /* | |
82 | * NORMACA and HISUP = 0, RESPONSE DATA FORMAT = 2 | |
83 | * | |
84 | * SPC4 says: | |
85 | * A RESPONSE DATA FORMAT field set to 2h indicates that the | |
86 | * standard INQUIRY data is in the format defined in this | |
87 | * standard. Response data format values less than 2h are | |
88 | * obsolete. Response data format values greater than 2h are | |
89 | * reserved. | |
90 | */ | |
91 | buf[3] = 2; | |
92 | ||
93 | /* | |
94 | * Enable SCCS and TPGS fields for Emulated ALUA | |
95 | */ | |
c87fbd56 | 96 | spc_fill_alua_data(lun->lun_sep, buf); |
1fd032ee CH |
97 | |
98 | buf[7] = 0x2; /* CmdQue=1 */ | |
99 | ||
100 | snprintf(&buf[8], 8, "LIO-ORG"); | |
0fd97ccf CH |
101 | snprintf(&buf[16], 16, "%s", dev->t10_wwn.model); |
102 | snprintf(&buf[32], 4, "%s", dev->t10_wwn.revision); | |
1fd032ee CH |
103 | buf[4] = 31; /* Set additional length to 31 */ |
104 | ||
105 | return 0; | |
106 | } | |
0dfa1c5d | 107 | EXPORT_SYMBOL(spc_emulate_inquiry_std); |
1fd032ee CH |
108 | |
109 | /* unit serial number */ | |
de103c93 CH |
110 | static sense_reason_t |
111 | spc_emulate_evpd_80(struct se_cmd *cmd, unsigned char *buf) | |
1fd032ee CH |
112 | { |
113 | struct se_device *dev = cmd->se_dev; | |
114 | u16 len = 0; | |
115 | ||
0fd97ccf | 116 | if (dev->dev_flags & DF_EMULATED_VPD_UNIT_SERIAL) { |
1fd032ee CH |
117 | u32 unit_serial_len; |
118 | ||
0fd97ccf | 119 | unit_serial_len = strlen(dev->t10_wwn.unit_serial); |
1fd032ee CH |
120 | unit_serial_len++; /* For NULL Terminator */ |
121 | ||
0fd97ccf | 122 | len += sprintf(&buf[4], "%s", dev->t10_wwn.unit_serial); |
1fd032ee CH |
123 | len++; /* Extra Byte for NULL Terminator */ |
124 | buf[3] = len; | |
125 | } | |
126 | return 0; | |
127 | } | |
128 | ||
129 | static void spc_parse_naa_6h_vendor_specific(struct se_device *dev, | |
130 | unsigned char *buf) | |
131 | { | |
0fd97ccf | 132 | unsigned char *p = &dev->t10_wwn.unit_serial[0]; |
1fd032ee CH |
133 | int cnt; |
134 | bool next = true; | |
135 | ||
136 | /* | |
137 | * Generate up to 36 bits of VENDOR SPECIFIC IDENTIFIER starting on | |
138 | * byte 3 bit 3-0 for NAA IEEE Registered Extended DESIGNATOR field | |
139 | * format, followed by 64 bits of VENDOR SPECIFIC IDENTIFIER EXTENSION | |
140 | * to complete the payload. These are based from VPD=0x80 PRODUCT SERIAL | |
141 | * NUMBER set via vpd_unit_serial in target_core_configfs.c to ensure | |
142 | * per device uniqeness. | |
143 | */ | |
144 | for (cnt = 0; *p && cnt < 13; p++) { | |
145 | int val = hex_to_bin(*p); | |
146 | ||
147 | if (val < 0) | |
148 | continue; | |
149 | ||
150 | if (next) { | |
151 | next = false; | |
152 | buf[cnt++] |= val; | |
153 | } else { | |
154 | next = true; | |
155 | buf[cnt] = val << 4; | |
156 | } | |
157 | } | |
158 | } | |
159 | ||
160 | /* | |
161 | * Device identification VPD, for a complete list of | |
162 | * DESIGNATOR TYPEs see spc4r17 Table 459. | |
163 | */ | |
0dfa1c5d | 164 | sense_reason_t |
de103c93 | 165 | spc_emulate_evpd_83(struct se_cmd *cmd, unsigned char *buf) |
1fd032ee CH |
166 | { |
167 | struct se_device *dev = cmd->se_dev; | |
168 | struct se_lun *lun = cmd->se_lun; | |
169 | struct se_port *port = NULL; | |
170 | struct se_portal_group *tpg = NULL; | |
171 | struct t10_alua_lu_gp_member *lu_gp_mem; | |
172 | struct t10_alua_tg_pt_gp *tg_pt_gp; | |
173 | struct t10_alua_tg_pt_gp_member *tg_pt_gp_mem; | |
0fd97ccf | 174 | unsigned char *prod = &dev->t10_wwn.model[0]; |
1fd032ee CH |
175 | u32 prod_len; |
176 | u32 unit_serial_len, off = 0; | |
177 | u16 len = 0, id_len; | |
178 | ||
179 | off = 4; | |
180 | ||
181 | /* | |
182 | * NAA IEEE Registered Extended Assigned designator format, see | |
183 | * spc4r17 section 7.7.3.6.5 | |
184 | * | |
185 | * We depend upon a target_core_mod/ConfigFS provided | |
186 | * /sys/kernel/config/target/core/$HBA/$DEV/wwn/vpd_unit_serial | |
187 | * value in order to return the NAA id. | |
188 | */ | |
0fd97ccf | 189 | if (!(dev->dev_flags & DF_EMULATED_VPD_UNIT_SERIAL)) |
1fd032ee CH |
190 | goto check_t10_vend_desc; |
191 | ||
192 | /* CODE SET == Binary */ | |
193 | buf[off++] = 0x1; | |
194 | ||
195 | /* Set ASSOCIATION == addressed logical unit: 0)b */ | |
196 | buf[off] = 0x00; | |
197 | ||
198 | /* Identifier/Designator type == NAA identifier */ | |
199 | buf[off++] |= 0x3; | |
200 | off++; | |
201 | ||
202 | /* Identifier/Designator length */ | |
203 | buf[off++] = 0x10; | |
204 | ||
205 | /* | |
206 | * Start NAA IEEE Registered Extended Identifier/Designator | |
207 | */ | |
208 | buf[off++] = (0x6 << 4); | |
209 | ||
210 | /* | |
211 | * Use OpenFabrics IEEE Company ID: 00 14 05 | |
212 | */ | |
213 | buf[off++] = 0x01; | |
214 | buf[off++] = 0x40; | |
215 | buf[off] = (0x5 << 4); | |
216 | ||
217 | /* | |
218 | * Return ConfigFS Unit Serial Number information for | |
219 | * VENDOR_SPECIFIC_IDENTIFIER and | |
220 | * VENDOR_SPECIFIC_IDENTIFIER_EXTENTION | |
221 | */ | |
222 | spc_parse_naa_6h_vendor_specific(dev, &buf[off]); | |
223 | ||
224 | len = 20; | |
225 | off = (len + 4); | |
226 | ||
227 | check_t10_vend_desc: | |
228 | /* | |
229 | * T10 Vendor Identifier Page, see spc4r17 section 7.7.3.4 | |
230 | */ | |
231 | id_len = 8; /* For Vendor field */ | |
232 | prod_len = 4; /* For VPD Header */ | |
233 | prod_len += 8; /* For Vendor field */ | |
234 | prod_len += strlen(prod); | |
235 | prod_len++; /* For : */ | |
236 | ||
0fd97ccf CH |
237 | if (dev->dev_flags & DF_EMULATED_VPD_UNIT_SERIAL) { |
238 | unit_serial_len = strlen(&dev->t10_wwn.unit_serial[0]); | |
1fd032ee CH |
239 | unit_serial_len++; /* For NULL Terminator */ |
240 | ||
241 | id_len += sprintf(&buf[off+12], "%s:%s", prod, | |
0fd97ccf | 242 | &dev->t10_wwn.unit_serial[0]); |
1fd032ee CH |
243 | } |
244 | buf[off] = 0x2; /* ASCII */ | |
245 | buf[off+1] = 0x1; /* T10 Vendor ID */ | |
246 | buf[off+2] = 0x0; | |
247 | memcpy(&buf[off+4], "LIO-ORG", 8); | |
248 | /* Extra Byte for NULL Terminator */ | |
249 | id_len++; | |
250 | /* Identifier Length */ | |
251 | buf[off+3] = id_len; | |
252 | /* Header size for Designation descriptor */ | |
253 | len += (id_len + 4); | |
254 | off += (id_len + 4); | |
255 | /* | |
256 | * struct se_port is only set for INQUIRY VPD=1 through $FABRIC_MOD | |
257 | */ | |
258 | port = lun->lun_sep; | |
259 | if (port) { | |
260 | struct t10_alua_lu_gp *lu_gp; | |
261 | u32 padding, scsi_name_len; | |
262 | u16 lu_gp_id = 0; | |
263 | u16 tg_pt_gp_id = 0; | |
264 | u16 tpgt; | |
265 | ||
266 | tpg = port->sep_tpg; | |
267 | /* | |
268 | * Relative target port identifer, see spc4r17 | |
269 | * section 7.7.3.7 | |
270 | * | |
271 | * Get the PROTOCOL IDENTIFIER as defined by spc4r17 | |
272 | * section 7.5.1 Table 362 | |
273 | */ | |
274 | buf[off] = | |
275 | (tpg->se_tpg_tfo->get_fabric_proto_ident(tpg) << 4); | |
276 | buf[off++] |= 0x1; /* CODE SET == Binary */ | |
277 | buf[off] = 0x80; /* Set PIV=1 */ | |
278 | /* Set ASSOCIATION == target port: 01b */ | |
279 | buf[off] |= 0x10; | |
280 | /* DESIGNATOR TYPE == Relative target port identifer */ | |
281 | buf[off++] |= 0x4; | |
282 | off++; /* Skip over Reserved */ | |
283 | buf[off++] = 4; /* DESIGNATOR LENGTH */ | |
284 | /* Skip over Obsolete field in RTPI payload | |
285 | * in Table 472 */ | |
286 | off += 2; | |
287 | buf[off++] = ((port->sep_rtpi >> 8) & 0xff); | |
288 | buf[off++] = (port->sep_rtpi & 0xff); | |
289 | len += 8; /* Header size + Designation descriptor */ | |
290 | /* | |
291 | * Target port group identifier, see spc4r17 | |
292 | * section 7.7.3.8 | |
293 | * | |
294 | * Get the PROTOCOL IDENTIFIER as defined by spc4r17 | |
295 | * section 7.5.1 Table 362 | |
296 | */ | |
1fd032ee CH |
297 | tg_pt_gp_mem = port->sep_alua_tg_pt_gp_mem; |
298 | if (!tg_pt_gp_mem) | |
299 | goto check_lu_gp; | |
300 | ||
301 | spin_lock(&tg_pt_gp_mem->tg_pt_gp_mem_lock); | |
302 | tg_pt_gp = tg_pt_gp_mem->tg_pt_gp; | |
303 | if (!tg_pt_gp) { | |
304 | spin_unlock(&tg_pt_gp_mem->tg_pt_gp_mem_lock); | |
305 | goto check_lu_gp; | |
306 | } | |
307 | tg_pt_gp_id = tg_pt_gp->tg_pt_gp_id; | |
308 | spin_unlock(&tg_pt_gp_mem->tg_pt_gp_mem_lock); | |
309 | ||
310 | buf[off] = | |
311 | (tpg->se_tpg_tfo->get_fabric_proto_ident(tpg) << 4); | |
312 | buf[off++] |= 0x1; /* CODE SET == Binary */ | |
313 | buf[off] = 0x80; /* Set PIV=1 */ | |
314 | /* Set ASSOCIATION == target port: 01b */ | |
315 | buf[off] |= 0x10; | |
316 | /* DESIGNATOR TYPE == Target port group identifier */ | |
317 | buf[off++] |= 0x5; | |
318 | off++; /* Skip over Reserved */ | |
319 | buf[off++] = 4; /* DESIGNATOR LENGTH */ | |
320 | off += 2; /* Skip over Reserved Field */ | |
321 | buf[off++] = ((tg_pt_gp_id >> 8) & 0xff); | |
322 | buf[off++] = (tg_pt_gp_id & 0xff); | |
323 | len += 8; /* Header size + Designation descriptor */ | |
324 | /* | |
325 | * Logical Unit Group identifier, see spc4r17 | |
326 | * section 7.7.3.8 | |
327 | */ | |
328 | check_lu_gp: | |
329 | lu_gp_mem = dev->dev_alua_lu_gp_mem; | |
330 | if (!lu_gp_mem) | |
331 | goto check_scsi_name; | |
332 | ||
333 | spin_lock(&lu_gp_mem->lu_gp_mem_lock); | |
334 | lu_gp = lu_gp_mem->lu_gp; | |
335 | if (!lu_gp) { | |
336 | spin_unlock(&lu_gp_mem->lu_gp_mem_lock); | |
337 | goto check_scsi_name; | |
338 | } | |
339 | lu_gp_id = lu_gp->lu_gp_id; | |
340 | spin_unlock(&lu_gp_mem->lu_gp_mem_lock); | |
341 | ||
342 | buf[off++] |= 0x1; /* CODE SET == Binary */ | |
343 | /* DESIGNATOR TYPE == Logical Unit Group identifier */ | |
344 | buf[off++] |= 0x6; | |
345 | off++; /* Skip over Reserved */ | |
346 | buf[off++] = 4; /* DESIGNATOR LENGTH */ | |
347 | off += 2; /* Skip over Reserved Field */ | |
348 | buf[off++] = ((lu_gp_id >> 8) & 0xff); | |
349 | buf[off++] = (lu_gp_id & 0xff); | |
350 | len += 8; /* Header size + Designation descriptor */ | |
351 | /* | |
352 | * SCSI name string designator, see spc4r17 | |
353 | * section 7.7.3.11 | |
354 | * | |
355 | * Get the PROTOCOL IDENTIFIER as defined by spc4r17 | |
356 | * section 7.5.1 Table 362 | |
357 | */ | |
358 | check_scsi_name: | |
359 | scsi_name_len = strlen(tpg->se_tpg_tfo->tpg_get_wwn(tpg)); | |
360 | /* UTF-8 ",t,0x<16-bit TPGT>" + NULL Terminator */ | |
361 | scsi_name_len += 10; | |
362 | /* Check for 4-byte padding */ | |
363 | padding = ((-scsi_name_len) & 3); | |
364 | if (padding != 0) | |
365 | scsi_name_len += padding; | |
366 | /* Header size + Designation descriptor */ | |
367 | scsi_name_len += 4; | |
368 | ||
369 | buf[off] = | |
370 | (tpg->se_tpg_tfo->get_fabric_proto_ident(tpg) << 4); | |
371 | buf[off++] |= 0x3; /* CODE SET == UTF-8 */ | |
372 | buf[off] = 0x80; /* Set PIV=1 */ | |
373 | /* Set ASSOCIATION == target port: 01b */ | |
374 | buf[off] |= 0x10; | |
375 | /* DESIGNATOR TYPE == SCSI name string */ | |
376 | buf[off++] |= 0x8; | |
377 | off += 2; /* Skip over Reserved and length */ | |
378 | /* | |
379 | * SCSI name string identifer containing, $FABRIC_MOD | |
380 | * dependent information. For LIO-Target and iSCSI | |
381 | * Target Port, this means "<iSCSI name>,t,0x<TPGT> in | |
382 | * UTF-8 encoding. | |
383 | */ | |
384 | tpgt = tpg->se_tpg_tfo->tpg_get_tag(tpg); | |
385 | scsi_name_len = sprintf(&buf[off], "%s,t,0x%04x", | |
386 | tpg->se_tpg_tfo->tpg_get_wwn(tpg), tpgt); | |
387 | scsi_name_len += 1 /* Include NULL terminator */; | |
388 | /* | |
389 | * The null-terminated, null-padded (see 4.4.2) SCSI | |
390 | * NAME STRING field contains a UTF-8 format string. | |
391 | * The number of bytes in the SCSI NAME STRING field | |
392 | * (i.e., the value in the DESIGNATOR LENGTH field) | |
393 | * shall be no larger than 256 and shall be a multiple | |
394 | * of four. | |
395 | */ | |
396 | if (padding) | |
397 | scsi_name_len += padding; | |
398 | ||
399 | buf[off-1] = scsi_name_len; | |
400 | off += scsi_name_len; | |
401 | /* Header size + Designation descriptor */ | |
402 | len += (scsi_name_len + 4); | |
403 | } | |
404 | buf[2] = ((len >> 8) & 0xff); | |
405 | buf[3] = (len & 0xff); /* Page Length for VPD 0x83 */ | |
406 | return 0; | |
407 | } | |
0dfa1c5d | 408 | EXPORT_SYMBOL(spc_emulate_evpd_83); |
1fd032ee CH |
409 | |
410 | /* Extended INQUIRY Data VPD Page */ | |
de103c93 CH |
411 | static sense_reason_t |
412 | spc_emulate_evpd_86(struct se_cmd *cmd, unsigned char *buf) | |
1fd032ee CH |
413 | { |
414 | buf[3] = 0x3c; | |
415 | /* Set HEADSUP, ORDSUP, SIMPSUP */ | |
416 | buf[5] = 0x07; | |
417 | ||
418 | /* If WriteCache emulation is enabled, set V_SUP */ | |
0fd97ccf | 419 | if (cmd->se_dev->dev_attrib.emulate_write_cache > 0) |
1fd032ee CH |
420 | buf[6] = 0x01; |
421 | return 0; | |
422 | } | |
423 | ||
424 | /* Block Limits VPD page */ | |
de103c93 CH |
425 | static sense_reason_t |
426 | spc_emulate_evpd_b0(struct se_cmd *cmd, unsigned char *buf) | |
1fd032ee CH |
427 | { |
428 | struct se_device *dev = cmd->se_dev; | |
429 | u32 max_sectors; | |
430 | int have_tp = 0; | |
431 | ||
432 | /* | |
433 | * Following spc3r22 section 6.5.3 Block Limits VPD page, when | |
434 | * emulate_tpu=1 or emulate_tpws=1 we will be expect a | |
435 | * different page length for Thin Provisioning. | |
436 | */ | |
0fd97ccf | 437 | if (dev->dev_attrib.emulate_tpu || dev->dev_attrib.emulate_tpws) |
1fd032ee CH |
438 | have_tp = 1; |
439 | ||
440 | buf[0] = dev->transport->get_device_type(dev); | |
441 | buf[3] = have_tp ? 0x3c : 0x10; | |
442 | ||
443 | /* Set WSNZ to 1 */ | |
444 | buf[4] = 0x01; | |
445 | ||
446 | /* | |
447 | * Set OPTIMAL TRANSFER LENGTH GRANULARITY | |
448 | */ | |
449 | put_unaligned_be16(1, &buf[6]); | |
450 | ||
451 | /* | |
452 | * Set MAXIMUM TRANSFER LENGTH | |
453 | */ | |
0fd97ccf CH |
454 | max_sectors = min(dev->dev_attrib.fabric_max_sectors, |
455 | dev->dev_attrib.hw_max_sectors); | |
1fd032ee CH |
456 | put_unaligned_be32(max_sectors, &buf[8]); |
457 | ||
458 | /* | |
459 | * Set OPTIMAL TRANSFER LENGTH | |
460 | */ | |
0fd97ccf | 461 | put_unaligned_be32(dev->dev_attrib.optimal_sectors, &buf[12]); |
1fd032ee CH |
462 | |
463 | /* | |
464 | * Exit now if we don't support TP. | |
465 | */ | |
466 | if (!have_tp) | |
773cbaf7 | 467 | goto max_write_same; |
1fd032ee CH |
468 | |
469 | /* | |
470 | * Set MAXIMUM UNMAP LBA COUNT | |
471 | */ | |
0fd97ccf | 472 | put_unaligned_be32(dev->dev_attrib.max_unmap_lba_count, &buf[20]); |
1fd032ee CH |
473 | |
474 | /* | |
475 | * Set MAXIMUM UNMAP BLOCK DESCRIPTOR COUNT | |
476 | */ | |
0fd97ccf | 477 | put_unaligned_be32(dev->dev_attrib.max_unmap_block_desc_count, |
1fd032ee CH |
478 | &buf[24]); |
479 | ||
480 | /* | |
481 | * Set OPTIMAL UNMAP GRANULARITY | |
482 | */ | |
0fd97ccf | 483 | put_unaligned_be32(dev->dev_attrib.unmap_granularity, &buf[28]); |
1fd032ee CH |
484 | |
485 | /* | |
486 | * UNMAP GRANULARITY ALIGNMENT | |
487 | */ | |
0fd97ccf | 488 | put_unaligned_be32(dev->dev_attrib.unmap_granularity_alignment, |
1fd032ee | 489 | &buf[32]); |
0fd97ccf | 490 | if (dev->dev_attrib.unmap_granularity_alignment != 0) |
1fd032ee CH |
491 | buf[32] |= 0x80; /* Set the UGAVALID bit */ |
492 | ||
773cbaf7 NB |
493 | /* |
494 | * MAXIMUM WRITE SAME LENGTH | |
495 | */ | |
496 | max_write_same: | |
497 | put_unaligned_be64(dev->dev_attrib.max_write_same_len, &buf[36]); | |
498 | ||
1fd032ee CH |
499 | return 0; |
500 | } | |
501 | ||
502 | /* Block Device Characteristics VPD page */ | |
de103c93 CH |
503 | static sense_reason_t |
504 | spc_emulate_evpd_b1(struct se_cmd *cmd, unsigned char *buf) | |
1fd032ee CH |
505 | { |
506 | struct se_device *dev = cmd->se_dev; | |
507 | ||
508 | buf[0] = dev->transport->get_device_type(dev); | |
509 | buf[3] = 0x3c; | |
0fd97ccf | 510 | buf[5] = dev->dev_attrib.is_nonrot ? 1 : 0; |
1fd032ee CH |
511 | |
512 | return 0; | |
513 | } | |
514 | ||
515 | /* Thin Provisioning VPD */ | |
de103c93 CH |
516 | static sense_reason_t |
517 | spc_emulate_evpd_b2(struct se_cmd *cmd, unsigned char *buf) | |
1fd032ee CH |
518 | { |
519 | struct se_device *dev = cmd->se_dev; | |
520 | ||
521 | /* | |
522 | * From spc3r22 section 6.5.4 Thin Provisioning VPD page: | |
523 | * | |
524 | * The PAGE LENGTH field is defined in SPC-4. If the DP bit is set to | |
525 | * zero, then the page length shall be set to 0004h. If the DP bit | |
526 | * is set to one, then the page length shall be set to the value | |
527 | * defined in table 162. | |
528 | */ | |
529 | buf[0] = dev->transport->get_device_type(dev); | |
530 | ||
531 | /* | |
532 | * Set Hardcoded length mentioned above for DP=0 | |
533 | */ | |
534 | put_unaligned_be16(0x0004, &buf[2]); | |
535 | ||
536 | /* | |
537 | * The THRESHOLD EXPONENT field indicates the threshold set size in | |
538 | * LBAs as a power of 2 (i.e., the threshold set size is equal to | |
539 | * 2(threshold exponent)). | |
540 | * | |
541 | * Note that this is currently set to 0x00 as mkp says it will be | |
542 | * changing again. We can enable this once it has settled in T10 | |
543 | * and is actually used by Linux/SCSI ML code. | |
544 | */ | |
545 | buf[4] = 0x00; | |
546 | ||
547 | /* | |
548 | * A TPU bit set to one indicates that the device server supports | |
549 | * the UNMAP command (see 5.25). A TPU bit set to zero indicates | |
550 | * that the device server does not support the UNMAP command. | |
551 | */ | |
0fd97ccf | 552 | if (dev->dev_attrib.emulate_tpu != 0) |
1fd032ee CH |
553 | buf[5] = 0x80; |
554 | ||
555 | /* | |
556 | * A TPWS bit set to one indicates that the device server supports | |
557 | * the use of the WRITE SAME (16) command (see 5.42) to unmap LBAs. | |
558 | * A TPWS bit set to zero indicates that the device server does not | |
559 | * support the use of the WRITE SAME (16) command to unmap LBAs. | |
560 | */ | |
0fd97ccf | 561 | if (dev->dev_attrib.emulate_tpws != 0) |
1fd032ee CH |
562 | buf[5] |= 0x40; |
563 | ||
564 | return 0; | |
565 | } | |
566 | ||
de103c93 CH |
567 | static sense_reason_t |
568 | spc_emulate_evpd_00(struct se_cmd *cmd, unsigned char *buf); | |
1fd032ee CH |
569 | |
570 | static struct { | |
571 | uint8_t page; | |
de103c93 | 572 | sense_reason_t (*emulate)(struct se_cmd *, unsigned char *); |
1fd032ee CH |
573 | } evpd_handlers[] = { |
574 | { .page = 0x00, .emulate = spc_emulate_evpd_00 }, | |
575 | { .page = 0x80, .emulate = spc_emulate_evpd_80 }, | |
576 | { .page = 0x83, .emulate = spc_emulate_evpd_83 }, | |
577 | { .page = 0x86, .emulate = spc_emulate_evpd_86 }, | |
578 | { .page = 0xb0, .emulate = spc_emulate_evpd_b0 }, | |
579 | { .page = 0xb1, .emulate = spc_emulate_evpd_b1 }, | |
580 | { .page = 0xb2, .emulate = spc_emulate_evpd_b2 }, | |
581 | }; | |
582 | ||
583 | /* supported vital product data pages */ | |
de103c93 CH |
584 | static sense_reason_t |
585 | spc_emulate_evpd_00(struct se_cmd *cmd, unsigned char *buf) | |
1fd032ee CH |
586 | { |
587 | int p; | |
588 | ||
589 | /* | |
590 | * Only report the INQUIRY EVPD=1 pages after a valid NAA | |
591 | * Registered Extended LUN WWN has been set via ConfigFS | |
592 | * during device creation/restart. | |
593 | */ | |
0fd97ccf | 594 | if (cmd->se_dev->dev_flags & DF_EMULATED_VPD_UNIT_SERIAL) { |
1fd032ee CH |
595 | buf[3] = ARRAY_SIZE(evpd_handlers); |
596 | for (p = 0; p < ARRAY_SIZE(evpd_handlers); ++p) | |
597 | buf[p + 4] = evpd_handlers[p].page; | |
598 | } | |
599 | ||
600 | return 0; | |
601 | } | |
602 | ||
de103c93 CH |
603 | static sense_reason_t |
604 | spc_emulate_inquiry(struct se_cmd *cmd) | |
1fd032ee CH |
605 | { |
606 | struct se_device *dev = cmd->se_dev; | |
607 | struct se_portal_group *tpg = cmd->se_lun->lun_sep->sep_tpg; | |
ffe7b0e9 | 608 | unsigned char *rbuf; |
1fd032ee | 609 | unsigned char *cdb = cmd->t_task_cdb; |
ffe7b0e9 | 610 | unsigned char buf[SE_INQUIRY_BUF]; |
de103c93 CH |
611 | sense_reason_t ret; |
612 | int p; | |
1fd032ee | 613 | |
dea5f099 NB |
614 | memset(buf, 0, SE_INQUIRY_BUF); |
615 | ||
1fd032ee CH |
616 | if (dev == tpg->tpg_virt_lun0.lun_se_dev) |
617 | buf[0] = 0x3f; /* Not connected */ | |
618 | else | |
619 | buf[0] = dev->transport->get_device_type(dev); | |
620 | ||
621 | if (!(cdb[1] & 0x1)) { | |
622 | if (cdb[2]) { | |
623 | pr_err("INQUIRY with EVPD==0 but PAGE CODE=%02x\n", | |
624 | cdb[2]); | |
de103c93 | 625 | ret = TCM_INVALID_CDB_FIELD; |
1fd032ee CH |
626 | goto out; |
627 | } | |
628 | ||
629 | ret = spc_emulate_inquiry_std(cmd, buf); | |
630 | goto out; | |
631 | } | |
632 | ||
633 | for (p = 0; p < ARRAY_SIZE(evpd_handlers); ++p) { | |
634 | if (cdb[2] == evpd_handlers[p].page) { | |
635 | buf[1] = cdb[2]; | |
636 | ret = evpd_handlers[p].emulate(cmd, buf); | |
637 | goto out; | |
638 | } | |
639 | } | |
640 | ||
641 | pr_err("Unknown VPD Code: 0x%02x\n", cdb[2]); | |
de103c93 | 642 | ret = TCM_INVALID_CDB_FIELD; |
1fd032ee CH |
643 | |
644 | out: | |
ffe7b0e9 | 645 | rbuf = transport_kmap_data_sg(cmd); |
49df9fc9 NB |
646 | if (rbuf) { |
647 | memcpy(rbuf, buf, min_t(u32, sizeof(buf), cmd->data_length)); | |
648 | transport_kunmap_data_sg(cmd); | |
649 | } | |
1fd032ee CH |
650 | |
651 | if (!ret) | |
652 | target_complete_cmd(cmd, GOOD); | |
653 | return ret; | |
654 | } | |
655 | ||
d4b2b867 | 656 | static int spc_modesense_rwrecovery(struct se_device *dev, u8 pc, u8 *p) |
1fd032ee CH |
657 | { |
658 | p[0] = 0x01; | |
659 | p[1] = 0x0a; | |
660 | ||
d4b2b867 RD |
661 | /* No changeable values for now */ |
662 | if (pc == 1) | |
663 | goto out; | |
664 | ||
665 | out: | |
1fd032ee CH |
666 | return 12; |
667 | } | |
668 | ||
d4b2b867 | 669 | static int spc_modesense_control(struct se_device *dev, u8 pc, u8 *p) |
1fd032ee CH |
670 | { |
671 | p[0] = 0x0a; | |
672 | p[1] = 0x0a; | |
d4b2b867 RD |
673 | |
674 | /* No changeable values for now */ | |
675 | if (pc == 1) | |
676 | goto out; | |
677 | ||
1fd032ee CH |
678 | p[2] = 2; |
679 | /* | |
680 | * From spc4r23, 7.4.7 Control mode page | |
681 | * | |
682 | * The QUEUE ALGORITHM MODIFIER field (see table 368) specifies | |
683 | * restrictions on the algorithm used for reordering commands | |
684 | * having the SIMPLE task attribute (see SAM-4). | |
685 | * | |
686 | * Table 368 -- QUEUE ALGORITHM MODIFIER field | |
687 | * Code Description | |
688 | * 0h Restricted reordering | |
689 | * 1h Unrestricted reordering allowed | |
690 | * 2h to 7h Reserved | |
691 | * 8h to Fh Vendor specific | |
692 | * | |
693 | * A value of zero in the QUEUE ALGORITHM MODIFIER field specifies that | |
694 | * the device server shall order the processing sequence of commands | |
695 | * having the SIMPLE task attribute such that data integrity is maintained | |
696 | * for that I_T nexus (i.e., if the transmission of new SCSI transport protocol | |
697 | * requests is halted at any time, the final value of all data observable | |
698 | * on the medium shall be the same as if all the commands had been processed | |
699 | * with the ORDERED task attribute). | |
700 | * | |
701 | * A value of one in the QUEUE ALGORITHM MODIFIER field specifies that the | |
702 | * device server may reorder the processing sequence of commands having the | |
703 | * SIMPLE task attribute in any manner. Any data integrity exposures related to | |
704 | * command sequence order shall be explicitly handled by the application client | |
705 | * through the selection of appropriate ommands and task attributes. | |
706 | */ | |
0fd97ccf | 707 | p[3] = (dev->dev_attrib.emulate_rest_reord == 1) ? 0x00 : 0x10; |
1fd032ee CH |
708 | /* |
709 | * From spc4r17, section 7.4.6 Control mode Page | |
710 | * | |
711 | * Unit Attention interlocks control (UN_INTLCK_CTRL) to code 00b | |
712 | * | |
713 | * 00b: The logical unit shall clear any unit attention condition | |
714 | * reported in the same I_T_L_Q nexus transaction as a CHECK CONDITION | |
715 | * status and shall not establish a unit attention condition when a com- | |
716 | * mand is completed with BUSY, TASK SET FULL, or RESERVATION CONFLICT | |
717 | * status. | |
718 | * | |
719 | * 10b: The logical unit shall not clear any unit attention condition | |
720 | * reported in the same I_T_L_Q nexus transaction as a CHECK CONDITION | |
721 | * status and shall not establish a unit attention condition when | |
722 | * a command is completed with BUSY, TASK SET FULL, or RESERVATION | |
723 | * CONFLICT status. | |
724 | * | |
725 | * 11b a The logical unit shall not clear any unit attention condition | |
726 | * reported in the same I_T_L_Q nexus transaction as a CHECK CONDITION | |
727 | * status and shall establish a unit attention condition for the | |
728 | * initiator port associated with the I_T nexus on which the BUSY, | |
729 | * TASK SET FULL, or RESERVATION CONFLICT status is being returned. | |
730 | * Depending on the status, the additional sense code shall be set to | |
731 | * PREVIOUS BUSY STATUS, PREVIOUS TASK SET FULL STATUS, or PREVIOUS | |
732 | * RESERVATION CONFLICT STATUS. Until it is cleared by a REQUEST SENSE | |
733 | * command, a unit attention condition shall be established only once | |
734 | * for a BUSY, TASK SET FULL, or RESERVATION CONFLICT status regardless | |
735 | * to the number of commands completed with one of those status codes. | |
736 | */ | |
0fd97ccf CH |
737 | p[4] = (dev->dev_attrib.emulate_ua_intlck_ctrl == 2) ? 0x30 : |
738 | (dev->dev_attrib.emulate_ua_intlck_ctrl == 1) ? 0x20 : 0x00; | |
1fd032ee CH |
739 | /* |
740 | * From spc4r17, section 7.4.6 Control mode Page | |
741 | * | |
742 | * Task Aborted Status (TAS) bit set to zero. | |
743 | * | |
744 | * A task aborted status (TAS) bit set to zero specifies that aborted | |
745 | * tasks shall be terminated by the device server without any response | |
746 | * to the application client. A TAS bit set to one specifies that tasks | |
747 | * aborted by the actions of an I_T nexus other than the I_T nexus on | |
748 | * which the command was received shall be completed with TASK ABORTED | |
749 | * status (see SAM-4). | |
750 | */ | |
0fd97ccf | 751 | p[5] = (dev->dev_attrib.emulate_tas) ? 0x40 : 0x00; |
1fd032ee CH |
752 | p[8] = 0xff; |
753 | p[9] = 0xff; | |
754 | p[11] = 30; | |
755 | ||
d4b2b867 | 756 | out: |
1fd032ee CH |
757 | return 12; |
758 | } | |
759 | ||
d4b2b867 | 760 | static int spc_modesense_caching(struct se_device *dev, u8 pc, u8 *p) |
1fd032ee CH |
761 | { |
762 | p[0] = 0x08; | |
763 | p[1] = 0x12; | |
d4b2b867 RD |
764 | |
765 | /* No changeable values for now */ | |
766 | if (pc == 1) | |
767 | goto out; | |
768 | ||
0fd97ccf | 769 | if (dev->dev_attrib.emulate_write_cache > 0) |
1fd032ee CH |
770 | p[2] = 0x04; /* Write Cache Enable */ |
771 | p[12] = 0x20; /* Disabled Read Ahead */ | |
772 | ||
d4b2b867 | 773 | out: |
1fd032ee CH |
774 | return 20; |
775 | } | |
776 | ||
0f6d64ce RD |
777 | static int spc_modesense_informational_exceptions(struct se_device *dev, u8 pc, unsigned char *p) |
778 | { | |
779 | p[0] = 0x1c; | |
780 | p[1] = 0x0a; | |
781 | ||
782 | /* No changeable values for now */ | |
783 | if (pc == 1) | |
784 | goto out; | |
785 | ||
786 | out: | |
787 | return 12; | |
788 | } | |
789 | ||
d4b2b867 RD |
790 | static struct { |
791 | uint8_t page; | |
792 | uint8_t subpage; | |
793 | int (*emulate)(struct se_device *, u8, unsigned char *); | |
794 | } modesense_handlers[] = { | |
795 | { .page = 0x01, .subpage = 0x00, .emulate = spc_modesense_rwrecovery }, | |
796 | { .page = 0x08, .subpage = 0x00, .emulate = spc_modesense_caching }, | |
797 | { .page = 0x0a, .subpage = 0x00, .emulate = spc_modesense_control }, | |
0f6d64ce | 798 | { .page = 0x1c, .subpage = 0x00, .emulate = spc_modesense_informational_exceptions }, |
d4b2b867 RD |
799 | }; |
800 | ||
1fd032ee CH |
801 | static void spc_modesense_write_protect(unsigned char *buf, int type) |
802 | { | |
803 | /* | |
804 | * I believe that the WP bit (bit 7) in the mode header is the same for | |
805 | * all device types.. | |
806 | */ | |
807 | switch (type) { | |
808 | case TYPE_DISK: | |
809 | case TYPE_TAPE: | |
810 | default: | |
811 | buf[0] |= 0x80; /* WP bit */ | |
812 | break; | |
813 | } | |
814 | } | |
815 | ||
816 | static void spc_modesense_dpofua(unsigned char *buf, int type) | |
817 | { | |
818 | switch (type) { | |
819 | case TYPE_DISK: | |
820 | buf[0] |= 0x10; /* DPOFUA bit */ | |
821 | break; | |
822 | default: | |
823 | break; | |
824 | } | |
825 | } | |
826 | ||
d4b2b867 RD |
827 | static int spc_modesense_blockdesc(unsigned char *buf, u64 blocks, u32 block_size) |
828 | { | |
829 | *buf++ = 8; | |
830 | put_unaligned_be32(min(blocks, 0xffffffffull), buf); | |
831 | buf += 4; | |
832 | put_unaligned_be32(block_size, buf); | |
833 | return 9; | |
834 | } | |
835 | ||
836 | static int spc_modesense_long_blockdesc(unsigned char *buf, u64 blocks, u32 block_size) | |
837 | { | |
838 | if (blocks <= 0xffffffff) | |
839 | return spc_modesense_blockdesc(buf + 3, blocks, block_size) + 3; | |
840 | ||
841 | *buf++ = 1; /* LONGLBA */ | |
842 | buf += 2; | |
843 | *buf++ = 16; | |
844 | put_unaligned_be64(blocks, buf); | |
845 | buf += 12; | |
846 | put_unaligned_be32(block_size, buf); | |
847 | ||
848 | return 17; | |
849 | } | |
850 | ||
de103c93 | 851 | static sense_reason_t spc_emulate_modesense(struct se_cmd *cmd) |
1fd032ee CH |
852 | { |
853 | struct se_device *dev = cmd->se_dev; | |
854 | char *cdb = cmd->t_task_cdb; | |
cab9609b | 855 | unsigned char buf[SE_MODE_PAGE_BUF], *rbuf; |
1fd032ee CH |
856 | int type = dev->transport->get_device_type(dev); |
857 | int ten = (cmd->t_task_cdb[0] == MODE_SENSE_10); | |
d4b2b867 RD |
858 | bool dbd = !!(cdb[1] & 0x08); |
859 | bool llba = ten ? !!(cdb[1] & 0x10) : false; | |
860 | u8 pc = cdb[2] >> 6; | |
861 | u8 page = cdb[2] & 0x3f; | |
862 | u8 subpage = cdb[3]; | |
1fd032ee | 863 | int length = 0; |
d4b2b867 RD |
864 | int ret; |
865 | int i; | |
1fd032ee | 866 | |
cab9609b NB |
867 | memset(buf, 0, SE_MODE_PAGE_BUF); |
868 | ||
fecae40a NB |
869 | /* |
870 | * Skip over MODE DATA LENGTH + MEDIUM TYPE fields to byte 3 for | |
871 | * MODE_SENSE_10 and byte 2 for MODE_SENSE (6). | |
872 | */ | |
873 | length = ten ? 3 : 2; | |
d4b2b867 RD |
874 | |
875 | /* DEVICE-SPECIFIC PARAMETER */ | |
876 | if ((cmd->se_lun->lun_access & TRANSPORT_LUNFLAGS_READ_ONLY) || | |
877 | (cmd->se_deve && | |
878 | (cmd->se_deve->lun_flags & TRANSPORT_LUNFLAGS_READ_ONLY))) | |
879 | spc_modesense_write_protect(&buf[length], type); | |
880 | ||
881 | if ((dev->dev_attrib.emulate_write_cache > 0) && | |
882 | (dev->dev_attrib.emulate_fua_write > 0)) | |
883 | spc_modesense_dpofua(&buf[length], type); | |
884 | ||
885 | ++length; | |
886 | ||
887 | /* BLOCK DESCRIPTOR */ | |
888 | ||
889 | /* | |
890 | * For now we only include a block descriptor for disk (SBC) | |
891 | * devices; other command sets use a slightly different format. | |
892 | */ | |
893 | if (!dbd && type == TYPE_DISK) { | |
894 | u64 blocks = dev->transport->get_blocks(dev); | |
895 | u32 block_size = dev->dev_attrib.block_size; | |
896 | ||
897 | if (ten) { | |
898 | if (llba) { | |
899 | length += spc_modesense_long_blockdesc(&buf[length], | |
900 | blocks, block_size); | |
901 | } else { | |
902 | length += 3; | |
903 | length += spc_modesense_blockdesc(&buf[length], | |
904 | blocks, block_size); | |
905 | } | |
906 | } else { | |
907 | length += spc_modesense_blockdesc(&buf[length], blocks, | |
908 | block_size); | |
909 | } | |
1fd032ee | 910 | } else { |
d4b2b867 RD |
911 | if (ten) |
912 | length += 4; | |
913 | else | |
914 | length += 1; | |
1fd032ee CH |
915 | } |
916 | ||
d4b2b867 RD |
917 | if (page == 0x3f) { |
918 | if (subpage != 0x00 && subpage != 0xff) { | |
de103c93 | 919 | pr_warn("MODE_SENSE: Invalid subpage code: 0x%02x\n", subpage); |
de103c93 | 920 | return TCM_INVALID_CDB_FIELD; |
d4b2b867 RD |
921 | } |
922 | ||
923 | for (i = 0; i < ARRAY_SIZE(modesense_handlers); ++i) { | |
924 | /* | |
925 | * Tricky way to say all subpage 00h for | |
926 | * subpage==0, all subpages for subpage==0xff | |
927 | * (and we just checked above that those are | |
928 | * the only two possibilities). | |
929 | */ | |
930 | if ((modesense_handlers[i].subpage & ~subpage) == 0) { | |
931 | ret = modesense_handlers[i].emulate(dev, pc, &buf[length]); | |
932 | if (!ten && length + ret >= 255) | |
933 | break; | |
934 | length += ret; | |
935 | } | |
936 | } | |
937 | ||
938 | goto set_length; | |
939 | } | |
940 | ||
941 | for (i = 0; i < ARRAY_SIZE(modesense_handlers); ++i) | |
942 | if (modesense_handlers[i].page == page && | |
943 | modesense_handlers[i].subpage == subpage) { | |
944 | length += modesense_handlers[i].emulate(dev, pc, &buf[length]); | |
945 | goto set_length; | |
946 | } | |
947 | ||
948 | /* | |
949 | * We don't intend to implement: | |
950 | * - obsolete page 03h "format parameters" (checked by Solaris) | |
951 | */ | |
952 | if (page != 0x03) | |
953 | pr_err("MODE SENSE: unimplemented page/subpage: 0x%02x/0x%02x\n", | |
954 | page, subpage); | |
955 | ||
de103c93 | 956 | return TCM_UNKNOWN_MODE_PAGE; |
d4b2b867 RD |
957 | |
958 | set_length: | |
959 | if (ten) | |
960 | put_unaligned_be16(length - 2, buf); | |
961 | else | |
962 | buf[0] = length - 1; | |
963 | ||
cab9609b NB |
964 | rbuf = transport_kmap_data_sg(cmd); |
965 | if (rbuf) { | |
966 | memcpy(rbuf, buf, min_t(u32, SE_MODE_PAGE_BUF, cmd->data_length)); | |
967 | transport_kunmap_data_sg(cmd); | |
7a3f369c | 968 | } |
1fd032ee CH |
969 | |
970 | target_complete_cmd(cmd, GOOD); | |
971 | return 0; | |
972 | } | |
973 | ||
de103c93 | 974 | static sense_reason_t spc_emulate_modeselect(struct se_cmd *cmd) |
3a3c5e4a RD |
975 | { |
976 | struct se_device *dev = cmd->se_dev; | |
977 | char *cdb = cmd->t_task_cdb; | |
978 | bool ten = cdb[0] == MODE_SELECT_10; | |
979 | int off = ten ? 8 : 4; | |
980 | bool pf = !!(cdb[1] & 0x10); | |
981 | u8 page, subpage; | |
982 | unsigned char *buf; | |
983 | unsigned char tbuf[SE_MODE_PAGE_BUF]; | |
984 | int length; | |
985 | int ret = 0; | |
986 | int i; | |
987 | ||
988 | buf = transport_kmap_data_sg(cmd); | |
de103c93 CH |
989 | if (!buf) |
990 | return TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; | |
3a3c5e4a RD |
991 | |
992 | if (!pf) { | |
de103c93 | 993 | ret = TCM_INVALID_CDB_FIELD; |
3a3c5e4a RD |
994 | goto out; |
995 | } | |
996 | ||
997 | page = buf[off] & 0x3f; | |
998 | subpage = buf[off] & 0x40 ? buf[off + 1] : 0; | |
999 | ||
1000 | for (i = 0; i < ARRAY_SIZE(modesense_handlers); ++i) | |
1001 | if (modesense_handlers[i].page == page && | |
1002 | modesense_handlers[i].subpage == subpage) { | |
1003 | memset(tbuf, 0, SE_MODE_PAGE_BUF); | |
1004 | length = modesense_handlers[i].emulate(dev, 0, tbuf); | |
1005 | goto check_contents; | |
1006 | } | |
1007 | ||
de103c93 | 1008 | ret = TCM_UNKNOWN_MODE_PAGE; |
3a3c5e4a RD |
1009 | goto out; |
1010 | ||
1011 | check_contents: | |
de103c93 CH |
1012 | if (memcmp(buf + off, tbuf, length)) |
1013 | ret = TCM_INVALID_PARAMETER_LIST; | |
3a3c5e4a RD |
1014 | |
1015 | out: | |
1016 | transport_kunmap_data_sg(cmd); | |
1017 | ||
1018 | if (!ret) | |
1019 | target_complete_cmd(cmd, GOOD); | |
1020 | return ret; | |
1021 | } | |
1022 | ||
de103c93 | 1023 | static sense_reason_t spc_emulate_request_sense(struct se_cmd *cmd) |
1fd032ee CH |
1024 | { |
1025 | unsigned char *cdb = cmd->t_task_cdb; | |
32a8811f | 1026 | unsigned char *rbuf; |
1fd032ee | 1027 | u8 ua_asc = 0, ua_ascq = 0; |
32a8811f PB |
1028 | unsigned char buf[SE_SENSE_BUF]; |
1029 | ||
1030 | memset(buf, 0, SE_SENSE_BUF); | |
1fd032ee CH |
1031 | |
1032 | if (cdb[1] & 0x01) { | |
1033 | pr_err("REQUEST_SENSE description emulation not" | |
1034 | " supported\n"); | |
de103c93 | 1035 | return TCM_INVALID_CDB_FIELD; |
1fd032ee CH |
1036 | } |
1037 | ||
32a8811f | 1038 | rbuf = transport_kmap_data_sg(cmd); |
de103c93 CH |
1039 | if (!rbuf) |
1040 | return TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; | |
1041 | ||
1042 | if (!core_scsi3_ua_clear_for_request_sense(cmd, &ua_asc, &ua_ascq)) { | |
1fd032ee CH |
1043 | /* |
1044 | * CURRENT ERROR, UNIT ATTENTION | |
1045 | */ | |
1046 | buf[0] = 0x70; | |
1047 | buf[SPC_SENSE_KEY_OFFSET] = UNIT_ATTENTION; | |
1048 | ||
1fd032ee CH |
1049 | /* |
1050 | * The Additional Sense Code (ASC) from the UNIT ATTENTION | |
1051 | */ | |
1052 | buf[SPC_ASC_KEY_OFFSET] = ua_asc; | |
1053 | buf[SPC_ASCQ_KEY_OFFSET] = ua_ascq; | |
1054 | buf[7] = 0x0A; | |
1055 | } else { | |
1056 | /* | |
1057 | * CURRENT ERROR, NO SENSE | |
1058 | */ | |
1059 | buf[0] = 0x70; | |
1060 | buf[SPC_SENSE_KEY_OFFSET] = NO_SENSE; | |
1061 | ||
1fd032ee CH |
1062 | /* |
1063 | * NO ADDITIONAL SENSE INFORMATION | |
1064 | */ | |
1065 | buf[SPC_ASC_KEY_OFFSET] = 0x00; | |
1066 | buf[7] = 0x0A; | |
1067 | } | |
1068 | ||
de103c93 CH |
1069 | memcpy(rbuf, buf, min_t(u32, sizeof(buf), cmd->data_length)); |
1070 | transport_kunmap_data_sg(cmd); | |
32a8811f | 1071 | |
1fd032ee CH |
1072 | target_complete_cmd(cmd, GOOD); |
1073 | return 0; | |
1074 | } | |
1075 | ||
de103c93 | 1076 | sense_reason_t spc_emulate_report_luns(struct se_cmd *cmd) |
d1b1f805 CH |
1077 | { |
1078 | struct se_dev_entry *deve; | |
1079 | struct se_session *sess = cmd->se_sess; | |
1080 | unsigned char *buf; | |
1081 | u32 lun_count = 0, offset = 8, i; | |
1082 | ||
1083 | if (cmd->data_length < 16) { | |
1084 | pr_warn("REPORT LUNS allocation length %u too small\n", | |
1085 | cmd->data_length); | |
de103c93 | 1086 | return TCM_INVALID_CDB_FIELD; |
d1b1f805 CH |
1087 | } |
1088 | ||
1089 | buf = transport_kmap_data_sg(cmd); | |
1090 | if (!buf) | |
de103c93 | 1091 | return TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; |
d1b1f805 CH |
1092 | |
1093 | /* | |
1094 | * If no struct se_session pointer is present, this struct se_cmd is | |
1095 | * coming via a target_core_mod PASSTHROUGH op, and not through | |
1096 | * a $FABRIC_MOD. In that case, report LUN=0 only. | |
1097 | */ | |
1098 | if (!sess) { | |
1099 | int_to_scsilun(0, (struct scsi_lun *)&buf[offset]); | |
1100 | lun_count = 1; | |
1101 | goto done; | |
1102 | } | |
1103 | ||
1104 | spin_lock_irq(&sess->se_node_acl->device_list_lock); | |
1105 | for (i = 0; i < TRANSPORT_MAX_LUNS_PER_TPG; i++) { | |
1106 | deve = sess->se_node_acl->device_list[i]; | |
1107 | if (!(deve->lun_flags & TRANSPORT_LUNFLAGS_INITIATOR_ACCESS)) | |
1108 | continue; | |
1109 | /* | |
1110 | * We determine the correct LUN LIST LENGTH even once we | |
1111 | * have reached the initial allocation length. | |
1112 | * See SPC2-R20 7.19. | |
1113 | */ | |
1114 | lun_count++; | |
1115 | if ((offset + 8) > cmd->data_length) | |
1116 | continue; | |
1117 | ||
1118 | int_to_scsilun(deve->mapped_lun, (struct scsi_lun *)&buf[offset]); | |
1119 | offset += 8; | |
1120 | } | |
1121 | spin_unlock_irq(&sess->se_node_acl->device_list_lock); | |
1122 | ||
1123 | /* | |
1124 | * See SPC3 r07, page 159. | |
1125 | */ | |
1126 | done: | |
1127 | lun_count *= 8; | |
1128 | buf[0] = ((lun_count >> 24) & 0xff); | |
1129 | buf[1] = ((lun_count >> 16) & 0xff); | |
1130 | buf[2] = ((lun_count >> 8) & 0xff); | |
1131 | buf[3] = (lun_count & 0xff); | |
1132 | transport_kunmap_data_sg(cmd); | |
1133 | ||
1134 | target_complete_cmd(cmd, GOOD); | |
1135 | return 0; | |
1136 | } | |
8de530a5 | 1137 | EXPORT_SYMBOL(spc_emulate_report_luns); |
d1b1f805 | 1138 | |
de103c93 CH |
1139 | static sense_reason_t |
1140 | spc_emulate_testunitready(struct se_cmd *cmd) | |
1fd032ee CH |
1141 | { |
1142 | target_complete_cmd(cmd, GOOD); | |
1143 | return 0; | |
1144 | } | |
1145 | ||
de103c93 CH |
1146 | sense_reason_t |
1147 | spc_parse_cdb(struct se_cmd *cmd, unsigned int *size) | |
88455ec4 | 1148 | { |
eba2ca45 | 1149 | struct se_device *dev = cmd->se_dev; |
88455ec4 CH |
1150 | unsigned char *cdb = cmd->t_task_cdb; |
1151 | ||
1152 | switch (cdb[0]) { | |
1153 | case MODE_SELECT: | |
1154 | *size = cdb[4]; | |
3a3c5e4a | 1155 | cmd->execute_cmd = spc_emulate_modeselect; |
88455ec4 CH |
1156 | break; |
1157 | case MODE_SELECT_10: | |
1158 | *size = (cdb[7] << 8) + cdb[8]; | |
3a3c5e4a | 1159 | cmd->execute_cmd = spc_emulate_modeselect; |
88455ec4 CH |
1160 | break; |
1161 | case MODE_SENSE: | |
1162 | *size = cdb[4]; | |
1fd032ee | 1163 | cmd->execute_cmd = spc_emulate_modesense; |
88455ec4 CH |
1164 | break; |
1165 | case MODE_SENSE_10: | |
1166 | *size = (cdb[7] << 8) + cdb[8]; | |
1fd032ee | 1167 | cmd->execute_cmd = spc_emulate_modesense; |
88455ec4 CH |
1168 | break; |
1169 | case LOG_SELECT: | |
1170 | case LOG_SENSE: | |
1171 | *size = (cdb[7] << 8) + cdb[8]; | |
1172 | break; | |
1173 | case PERSISTENT_RESERVE_IN: | |
88455ec4 | 1174 | *size = (cdb[7] << 8) + cdb[8]; |
d977f437 | 1175 | cmd->execute_cmd = target_scsi3_emulate_pr_in; |
88455ec4 CH |
1176 | break; |
1177 | case PERSISTENT_RESERVE_OUT: | |
88455ec4 | 1178 | *size = (cdb[7] << 8) + cdb[8]; |
d977f437 | 1179 | cmd->execute_cmd = target_scsi3_emulate_pr_out; |
88455ec4 CH |
1180 | break; |
1181 | case RELEASE: | |
1182 | case RELEASE_10: | |
1183 | if (cdb[0] == RELEASE_10) | |
1184 | *size = (cdb[7] << 8) | cdb[8]; | |
1185 | else | |
1186 | *size = cmd->data_length; | |
1187 | ||
d977f437 | 1188 | cmd->execute_cmd = target_scsi2_reservation_release; |
88455ec4 CH |
1189 | break; |
1190 | case RESERVE: | |
1191 | case RESERVE_10: | |
1192 | /* | |
1193 | * The SPC-2 RESERVE does not contain a size in the SCSI CDB. | |
1194 | * Assume the passthrough or $FABRIC_MOD will tell us about it. | |
1195 | */ | |
1196 | if (cdb[0] == RESERVE_10) | |
1197 | *size = (cdb[7] << 8) | cdb[8]; | |
1198 | else | |
1199 | *size = cmd->data_length; | |
1200 | ||
d977f437 | 1201 | cmd->execute_cmd = target_scsi2_reservation_reserve; |
88455ec4 CH |
1202 | break; |
1203 | case REQUEST_SENSE: | |
1204 | *size = cdb[4]; | |
1fd032ee | 1205 | cmd->execute_cmd = spc_emulate_request_sense; |
88455ec4 CH |
1206 | break; |
1207 | case INQUIRY: | |
1208 | *size = (cdb[3] << 8) + cdb[4]; | |
1209 | ||
1210 | /* | |
1211 | * Do implict HEAD_OF_QUEUE processing for INQUIRY. | |
1212 | * See spc4r17 section 5.3 | |
1213 | */ | |
019c4ca6 | 1214 | cmd->sam_task_attr = MSG_HEAD_TAG; |
1fd032ee | 1215 | cmd->execute_cmd = spc_emulate_inquiry; |
88455ec4 CH |
1216 | break; |
1217 | case SECURITY_PROTOCOL_IN: | |
1218 | case SECURITY_PROTOCOL_OUT: | |
1219 | *size = (cdb[6] << 24) | (cdb[7] << 16) | (cdb[8] << 8) | cdb[9]; | |
1220 | break; | |
1221 | case EXTENDED_COPY: | |
1222 | case READ_ATTRIBUTE: | |
1223 | case RECEIVE_COPY_RESULTS: | |
1224 | case WRITE_ATTRIBUTE: | |
1225 | *size = (cdb[10] << 24) | (cdb[11] << 16) | | |
1226 | (cdb[12] << 8) | cdb[13]; | |
1227 | break; | |
1228 | case RECEIVE_DIAGNOSTIC: | |
1229 | case SEND_DIAGNOSTIC: | |
1230 | *size = (cdb[3] << 8) | cdb[4]; | |
1231 | break; | |
1232 | case WRITE_BUFFER: | |
1233 | *size = (cdb[6] << 16) + (cdb[7] << 8) + cdb[8]; | |
1234 | break; | |
1235 | case REPORT_LUNS: | |
d1b1f805 | 1236 | cmd->execute_cmd = spc_emulate_report_luns; |
88455ec4 CH |
1237 | *size = (cdb[6] << 24) | (cdb[7] << 16) | (cdb[8] << 8) | cdb[9]; |
1238 | /* | |
1239 | * Do implict HEAD_OF_QUEUE processing for REPORT_LUNS | |
1240 | * See spc4r17 section 5.3 | |
1241 | */ | |
019c4ca6 | 1242 | cmd->sam_task_attr = MSG_HEAD_TAG; |
88455ec4 CH |
1243 | break; |
1244 | case TEST_UNIT_READY: | |
1fd032ee | 1245 | cmd->execute_cmd = spc_emulate_testunitready; |
d6e0175c | 1246 | *size = 0; |
88455ec4 | 1247 | break; |
eba2ca45 NB |
1248 | case MAINTENANCE_IN: |
1249 | if (dev->transport->get_device_type(dev) != TYPE_ROM) { | |
1250 | /* | |
1251 | * MAINTENANCE_IN from SCC-2 | |
1252 | * Check for emulated MI_REPORT_TARGET_PGS | |
1253 | */ | |
c87fbd56 | 1254 | if ((cdb[1] & 0x1f) == MI_REPORT_TARGET_PGS) { |
eba2ca45 NB |
1255 | cmd->execute_cmd = |
1256 | target_emulate_report_target_port_groups; | |
1257 | } | |
1258 | *size = get_unaligned_be32(&cdb[6]); | |
1259 | } else { | |
1260 | /* | |
1261 | * GPCMD_SEND_KEY from multi media commands | |
1262 | */ | |
1263 | *size = get_unaligned_be16(&cdb[8]); | |
1264 | } | |
1265 | break; | |
1266 | case MAINTENANCE_OUT: | |
1267 | if (dev->transport->get_device_type(dev) != TYPE_ROM) { | |
1268 | /* | |
1269 | * MAINTENANCE_OUT from SCC-2 | |
1270 | * Check for emulated MO_SET_TARGET_PGS. | |
1271 | */ | |
c87fbd56 | 1272 | if (cdb[1] == MO_SET_TARGET_PGS) { |
eba2ca45 NB |
1273 | cmd->execute_cmd = |
1274 | target_emulate_set_target_port_groups; | |
1275 | } | |
1276 | *size = get_unaligned_be32(&cdb[6]); | |
1277 | } else { | |
1278 | /* | |
1279 | * GPCMD_SEND_KEY from multi media commands | |
1280 | */ | |
1281 | *size = get_unaligned_be16(&cdb[8]); | |
1282 | } | |
1283 | break; | |
88455ec4 CH |
1284 | default: |
1285 | pr_warn("TARGET_CORE[%s]: Unsupported SCSI Opcode" | |
1286 | " 0x%02x, sending CHECK_CONDITION.\n", | |
1287 | cmd->se_tfo->get_fabric_name(), cdb[0]); | |
de103c93 | 1288 | return TCM_UNSUPPORTED_SCSI_OPCODE; |
88455ec4 CH |
1289 | } |
1290 | ||
1291 | return 0; | |
1292 | } | |
1293 | EXPORT_SYMBOL(spc_parse_cdb); |