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88455ec4 CH |
1 | /* |
2 | * SCSI Primary Commands (SPC) parsing and emulation. | |
3 | * | |
4 | * Copyright (c) 2002, 2003, 2004, 2005 PyX Technologies, Inc. | |
5 | * Copyright (c) 2005, 2006, 2007 SBE, Inc. | |
6 | * Copyright (c) 2007-2010 Rising Tide Systems | |
7 | * Copyright (c) 2008-2010 Linux-iSCSI.org | |
8 | * | |
9 | * Nicholas A. Bellinger <nab@kernel.org> | |
10 | * | |
11 | * This program is free software; you can redistribute it and/or modify | |
12 | * it under the terms of the GNU General Public License as published by | |
13 | * the Free Software Foundation; either version 2 of the License, or | |
14 | * (at your option) any later version. | |
15 | * | |
16 | * This program is distributed in the hope that it will be useful, | |
17 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
18 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
19 | * GNU General Public License for more details. | |
20 | * | |
21 | * You should have received a copy of the GNU General Public License | |
22 | * along with this program; if not, write to the Free Software | |
23 | * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. | |
24 | */ | |
25 | ||
26 | #include <linux/kernel.h> | |
27 | #include <linux/module.h> | |
28 | #include <asm/unaligned.h> | |
29 | ||
30 | #include <scsi/scsi.h> | |
31 | #include <scsi/scsi_tcq.h> | |
32 | ||
33 | #include <target/target_core_base.h> | |
34 | #include <target/target_core_backend.h> | |
35 | #include <target/target_core_fabric.h> | |
36 | ||
37 | #include "target_core_internal.h" | |
eba2ca45 | 38 | #include "target_core_alua.h" |
88455ec4 CH |
39 | #include "target_core_pr.h" |
40 | #include "target_core_ua.h" | |
41 | ||
42 | ||
1fd032ee CH |
43 | static void spc_fill_alua_data(struct se_port *port, unsigned char *buf) |
44 | { | |
45 | struct t10_alua_tg_pt_gp *tg_pt_gp; | |
46 | struct t10_alua_tg_pt_gp_member *tg_pt_gp_mem; | |
47 | ||
48 | /* | |
49 | * Set SCCS for MAINTENANCE_IN + REPORT_TARGET_PORT_GROUPS. | |
50 | */ | |
51 | buf[5] = 0x80; | |
52 | ||
53 | /* | |
54 | * Set TPGS field for explict and/or implict ALUA access type | |
55 | * and opteration. | |
56 | * | |
57 | * See spc4r17 section 6.4.2 Table 135 | |
58 | */ | |
59 | if (!port) | |
60 | return; | |
61 | tg_pt_gp_mem = port->sep_alua_tg_pt_gp_mem; | |
62 | if (!tg_pt_gp_mem) | |
63 | return; | |
64 | ||
65 | spin_lock(&tg_pt_gp_mem->tg_pt_gp_mem_lock); | |
66 | tg_pt_gp = tg_pt_gp_mem->tg_pt_gp; | |
67 | if (tg_pt_gp) | |
68 | buf[5] |= tg_pt_gp->tg_pt_gp_alua_access_type; | |
69 | spin_unlock(&tg_pt_gp_mem->tg_pt_gp_mem_lock); | |
70 | } | |
71 | ||
de103c93 CH |
72 | static sense_reason_t |
73 | spc_emulate_inquiry_std(struct se_cmd *cmd, char *buf) | |
1fd032ee CH |
74 | { |
75 | struct se_lun *lun = cmd->se_lun; | |
76 | struct se_device *dev = cmd->se_dev; | |
77 | ||
78 | /* Set RMB (removable media) for tape devices */ | |
79 | if (dev->transport->get_device_type(dev) == TYPE_TAPE) | |
80 | buf[1] = 0x80; | |
81 | ||
48c2567d | 82 | buf[2] = 0x05; /* SPC-3 */ |
1fd032ee CH |
83 | |
84 | /* | |
85 | * NORMACA and HISUP = 0, RESPONSE DATA FORMAT = 2 | |
86 | * | |
87 | * SPC4 says: | |
88 | * A RESPONSE DATA FORMAT field set to 2h indicates that the | |
89 | * standard INQUIRY data is in the format defined in this | |
90 | * standard. Response data format values less than 2h are | |
91 | * obsolete. Response data format values greater than 2h are | |
92 | * reserved. | |
93 | */ | |
94 | buf[3] = 2; | |
95 | ||
96 | /* | |
97 | * Enable SCCS and TPGS fields for Emulated ALUA | |
98 | */ | |
c87fbd56 | 99 | spc_fill_alua_data(lun->lun_sep, buf); |
1fd032ee CH |
100 | |
101 | buf[7] = 0x2; /* CmdQue=1 */ | |
102 | ||
103 | snprintf(&buf[8], 8, "LIO-ORG"); | |
0fd97ccf CH |
104 | snprintf(&buf[16], 16, "%s", dev->t10_wwn.model); |
105 | snprintf(&buf[32], 4, "%s", dev->t10_wwn.revision); | |
1fd032ee CH |
106 | buf[4] = 31; /* Set additional length to 31 */ |
107 | ||
108 | return 0; | |
109 | } | |
110 | ||
111 | /* unit serial number */ | |
de103c93 CH |
112 | static sense_reason_t |
113 | spc_emulate_evpd_80(struct se_cmd *cmd, unsigned char *buf) | |
1fd032ee CH |
114 | { |
115 | struct se_device *dev = cmd->se_dev; | |
116 | u16 len = 0; | |
117 | ||
0fd97ccf | 118 | if (dev->dev_flags & DF_EMULATED_VPD_UNIT_SERIAL) { |
1fd032ee CH |
119 | u32 unit_serial_len; |
120 | ||
0fd97ccf | 121 | unit_serial_len = strlen(dev->t10_wwn.unit_serial); |
1fd032ee CH |
122 | unit_serial_len++; /* For NULL Terminator */ |
123 | ||
0fd97ccf | 124 | len += sprintf(&buf[4], "%s", dev->t10_wwn.unit_serial); |
1fd032ee CH |
125 | len++; /* Extra Byte for NULL Terminator */ |
126 | buf[3] = len; | |
127 | } | |
128 | return 0; | |
129 | } | |
130 | ||
131 | static void spc_parse_naa_6h_vendor_specific(struct se_device *dev, | |
132 | unsigned char *buf) | |
133 | { | |
0fd97ccf | 134 | unsigned char *p = &dev->t10_wwn.unit_serial[0]; |
1fd032ee CH |
135 | int cnt; |
136 | bool next = true; | |
137 | ||
138 | /* | |
139 | * Generate up to 36 bits of VENDOR SPECIFIC IDENTIFIER starting on | |
140 | * byte 3 bit 3-0 for NAA IEEE Registered Extended DESIGNATOR field | |
141 | * format, followed by 64 bits of VENDOR SPECIFIC IDENTIFIER EXTENSION | |
142 | * to complete the payload. These are based from VPD=0x80 PRODUCT SERIAL | |
143 | * NUMBER set via vpd_unit_serial in target_core_configfs.c to ensure | |
144 | * per device uniqeness. | |
145 | */ | |
146 | for (cnt = 0; *p && cnt < 13; p++) { | |
147 | int val = hex_to_bin(*p); | |
148 | ||
149 | if (val < 0) | |
150 | continue; | |
151 | ||
152 | if (next) { | |
153 | next = false; | |
154 | buf[cnt++] |= val; | |
155 | } else { | |
156 | next = true; | |
157 | buf[cnt] = val << 4; | |
158 | } | |
159 | } | |
160 | } | |
161 | ||
162 | /* | |
163 | * Device identification VPD, for a complete list of | |
164 | * DESIGNATOR TYPEs see spc4r17 Table 459. | |
165 | */ | |
de103c93 CH |
166 | static sense_reason_t |
167 | spc_emulate_evpd_83(struct se_cmd *cmd, unsigned char *buf) | |
1fd032ee CH |
168 | { |
169 | struct se_device *dev = cmd->se_dev; | |
170 | struct se_lun *lun = cmd->se_lun; | |
171 | struct se_port *port = NULL; | |
172 | struct se_portal_group *tpg = NULL; | |
173 | struct t10_alua_lu_gp_member *lu_gp_mem; | |
174 | struct t10_alua_tg_pt_gp *tg_pt_gp; | |
175 | struct t10_alua_tg_pt_gp_member *tg_pt_gp_mem; | |
0fd97ccf | 176 | unsigned char *prod = &dev->t10_wwn.model[0]; |
1fd032ee CH |
177 | u32 prod_len; |
178 | u32 unit_serial_len, off = 0; | |
179 | u16 len = 0, id_len; | |
180 | ||
181 | off = 4; | |
182 | ||
183 | /* | |
184 | * NAA IEEE Registered Extended Assigned designator format, see | |
185 | * spc4r17 section 7.7.3.6.5 | |
186 | * | |
187 | * We depend upon a target_core_mod/ConfigFS provided | |
188 | * /sys/kernel/config/target/core/$HBA/$DEV/wwn/vpd_unit_serial | |
189 | * value in order to return the NAA id. | |
190 | */ | |
0fd97ccf | 191 | if (!(dev->dev_flags & DF_EMULATED_VPD_UNIT_SERIAL)) |
1fd032ee CH |
192 | goto check_t10_vend_desc; |
193 | ||
194 | /* CODE SET == Binary */ | |
195 | buf[off++] = 0x1; | |
196 | ||
197 | /* Set ASSOCIATION == addressed logical unit: 0)b */ | |
198 | buf[off] = 0x00; | |
199 | ||
200 | /* Identifier/Designator type == NAA identifier */ | |
201 | buf[off++] |= 0x3; | |
202 | off++; | |
203 | ||
204 | /* Identifier/Designator length */ | |
205 | buf[off++] = 0x10; | |
206 | ||
207 | /* | |
208 | * Start NAA IEEE Registered Extended Identifier/Designator | |
209 | */ | |
210 | buf[off++] = (0x6 << 4); | |
211 | ||
212 | /* | |
213 | * Use OpenFabrics IEEE Company ID: 00 14 05 | |
214 | */ | |
215 | buf[off++] = 0x01; | |
216 | buf[off++] = 0x40; | |
217 | buf[off] = (0x5 << 4); | |
218 | ||
219 | /* | |
220 | * Return ConfigFS Unit Serial Number information for | |
221 | * VENDOR_SPECIFIC_IDENTIFIER and | |
222 | * VENDOR_SPECIFIC_IDENTIFIER_EXTENTION | |
223 | */ | |
224 | spc_parse_naa_6h_vendor_specific(dev, &buf[off]); | |
225 | ||
226 | len = 20; | |
227 | off = (len + 4); | |
228 | ||
229 | check_t10_vend_desc: | |
230 | /* | |
231 | * T10 Vendor Identifier Page, see spc4r17 section 7.7.3.4 | |
232 | */ | |
233 | id_len = 8; /* For Vendor field */ | |
234 | prod_len = 4; /* For VPD Header */ | |
235 | prod_len += 8; /* For Vendor field */ | |
236 | prod_len += strlen(prod); | |
237 | prod_len++; /* For : */ | |
238 | ||
0fd97ccf CH |
239 | if (dev->dev_flags & DF_EMULATED_VPD_UNIT_SERIAL) { |
240 | unit_serial_len = strlen(&dev->t10_wwn.unit_serial[0]); | |
1fd032ee CH |
241 | unit_serial_len++; /* For NULL Terminator */ |
242 | ||
243 | id_len += sprintf(&buf[off+12], "%s:%s", prod, | |
0fd97ccf | 244 | &dev->t10_wwn.unit_serial[0]); |
1fd032ee CH |
245 | } |
246 | buf[off] = 0x2; /* ASCII */ | |
247 | buf[off+1] = 0x1; /* T10 Vendor ID */ | |
248 | buf[off+2] = 0x0; | |
249 | memcpy(&buf[off+4], "LIO-ORG", 8); | |
250 | /* Extra Byte for NULL Terminator */ | |
251 | id_len++; | |
252 | /* Identifier Length */ | |
253 | buf[off+3] = id_len; | |
254 | /* Header size for Designation descriptor */ | |
255 | len += (id_len + 4); | |
256 | off += (id_len + 4); | |
257 | /* | |
258 | * struct se_port is only set for INQUIRY VPD=1 through $FABRIC_MOD | |
259 | */ | |
260 | port = lun->lun_sep; | |
261 | if (port) { | |
262 | struct t10_alua_lu_gp *lu_gp; | |
263 | u32 padding, scsi_name_len; | |
264 | u16 lu_gp_id = 0; | |
265 | u16 tg_pt_gp_id = 0; | |
266 | u16 tpgt; | |
267 | ||
268 | tpg = port->sep_tpg; | |
269 | /* | |
270 | * Relative target port identifer, see spc4r17 | |
271 | * section 7.7.3.7 | |
272 | * | |
273 | * Get the PROTOCOL IDENTIFIER as defined by spc4r17 | |
274 | * section 7.5.1 Table 362 | |
275 | */ | |
276 | buf[off] = | |
277 | (tpg->se_tpg_tfo->get_fabric_proto_ident(tpg) << 4); | |
278 | buf[off++] |= 0x1; /* CODE SET == Binary */ | |
279 | buf[off] = 0x80; /* Set PIV=1 */ | |
280 | /* Set ASSOCIATION == target port: 01b */ | |
281 | buf[off] |= 0x10; | |
282 | /* DESIGNATOR TYPE == Relative target port identifer */ | |
283 | buf[off++] |= 0x4; | |
284 | off++; /* Skip over Reserved */ | |
285 | buf[off++] = 4; /* DESIGNATOR LENGTH */ | |
286 | /* Skip over Obsolete field in RTPI payload | |
287 | * in Table 472 */ | |
288 | off += 2; | |
289 | buf[off++] = ((port->sep_rtpi >> 8) & 0xff); | |
290 | buf[off++] = (port->sep_rtpi & 0xff); | |
291 | len += 8; /* Header size + Designation descriptor */ | |
292 | /* | |
293 | * Target port group identifier, see spc4r17 | |
294 | * section 7.7.3.8 | |
295 | * | |
296 | * Get the PROTOCOL IDENTIFIER as defined by spc4r17 | |
297 | * section 7.5.1 Table 362 | |
298 | */ | |
1fd032ee CH |
299 | tg_pt_gp_mem = port->sep_alua_tg_pt_gp_mem; |
300 | if (!tg_pt_gp_mem) | |
301 | goto check_lu_gp; | |
302 | ||
303 | spin_lock(&tg_pt_gp_mem->tg_pt_gp_mem_lock); | |
304 | tg_pt_gp = tg_pt_gp_mem->tg_pt_gp; | |
305 | if (!tg_pt_gp) { | |
306 | spin_unlock(&tg_pt_gp_mem->tg_pt_gp_mem_lock); | |
307 | goto check_lu_gp; | |
308 | } | |
309 | tg_pt_gp_id = tg_pt_gp->tg_pt_gp_id; | |
310 | spin_unlock(&tg_pt_gp_mem->tg_pt_gp_mem_lock); | |
311 | ||
312 | buf[off] = | |
313 | (tpg->se_tpg_tfo->get_fabric_proto_ident(tpg) << 4); | |
314 | buf[off++] |= 0x1; /* CODE SET == Binary */ | |
315 | buf[off] = 0x80; /* Set PIV=1 */ | |
316 | /* Set ASSOCIATION == target port: 01b */ | |
317 | buf[off] |= 0x10; | |
318 | /* DESIGNATOR TYPE == Target port group identifier */ | |
319 | buf[off++] |= 0x5; | |
320 | off++; /* Skip over Reserved */ | |
321 | buf[off++] = 4; /* DESIGNATOR LENGTH */ | |
322 | off += 2; /* Skip over Reserved Field */ | |
323 | buf[off++] = ((tg_pt_gp_id >> 8) & 0xff); | |
324 | buf[off++] = (tg_pt_gp_id & 0xff); | |
325 | len += 8; /* Header size + Designation descriptor */ | |
326 | /* | |
327 | * Logical Unit Group identifier, see spc4r17 | |
328 | * section 7.7.3.8 | |
329 | */ | |
330 | check_lu_gp: | |
331 | lu_gp_mem = dev->dev_alua_lu_gp_mem; | |
332 | if (!lu_gp_mem) | |
333 | goto check_scsi_name; | |
334 | ||
335 | spin_lock(&lu_gp_mem->lu_gp_mem_lock); | |
336 | lu_gp = lu_gp_mem->lu_gp; | |
337 | if (!lu_gp) { | |
338 | spin_unlock(&lu_gp_mem->lu_gp_mem_lock); | |
339 | goto check_scsi_name; | |
340 | } | |
341 | lu_gp_id = lu_gp->lu_gp_id; | |
342 | spin_unlock(&lu_gp_mem->lu_gp_mem_lock); | |
343 | ||
344 | buf[off++] |= 0x1; /* CODE SET == Binary */ | |
345 | /* DESIGNATOR TYPE == Logical Unit Group identifier */ | |
346 | buf[off++] |= 0x6; | |
347 | off++; /* Skip over Reserved */ | |
348 | buf[off++] = 4; /* DESIGNATOR LENGTH */ | |
349 | off += 2; /* Skip over Reserved Field */ | |
350 | buf[off++] = ((lu_gp_id >> 8) & 0xff); | |
351 | buf[off++] = (lu_gp_id & 0xff); | |
352 | len += 8; /* Header size + Designation descriptor */ | |
353 | /* | |
354 | * SCSI name string designator, see spc4r17 | |
355 | * section 7.7.3.11 | |
356 | * | |
357 | * Get the PROTOCOL IDENTIFIER as defined by spc4r17 | |
358 | * section 7.5.1 Table 362 | |
359 | */ | |
360 | check_scsi_name: | |
361 | scsi_name_len = strlen(tpg->se_tpg_tfo->tpg_get_wwn(tpg)); | |
362 | /* UTF-8 ",t,0x<16-bit TPGT>" + NULL Terminator */ | |
363 | scsi_name_len += 10; | |
364 | /* Check for 4-byte padding */ | |
365 | padding = ((-scsi_name_len) & 3); | |
366 | if (padding != 0) | |
367 | scsi_name_len += padding; | |
368 | /* Header size + Designation descriptor */ | |
369 | scsi_name_len += 4; | |
370 | ||
371 | buf[off] = | |
372 | (tpg->se_tpg_tfo->get_fabric_proto_ident(tpg) << 4); | |
373 | buf[off++] |= 0x3; /* CODE SET == UTF-8 */ | |
374 | buf[off] = 0x80; /* Set PIV=1 */ | |
375 | /* Set ASSOCIATION == target port: 01b */ | |
376 | buf[off] |= 0x10; | |
377 | /* DESIGNATOR TYPE == SCSI name string */ | |
378 | buf[off++] |= 0x8; | |
379 | off += 2; /* Skip over Reserved and length */ | |
380 | /* | |
381 | * SCSI name string identifer containing, $FABRIC_MOD | |
382 | * dependent information. For LIO-Target and iSCSI | |
383 | * Target Port, this means "<iSCSI name>,t,0x<TPGT> in | |
384 | * UTF-8 encoding. | |
385 | */ | |
386 | tpgt = tpg->se_tpg_tfo->tpg_get_tag(tpg); | |
387 | scsi_name_len = sprintf(&buf[off], "%s,t,0x%04x", | |
388 | tpg->se_tpg_tfo->tpg_get_wwn(tpg), tpgt); | |
389 | scsi_name_len += 1 /* Include NULL terminator */; | |
390 | /* | |
391 | * The null-terminated, null-padded (see 4.4.2) SCSI | |
392 | * NAME STRING field contains a UTF-8 format string. | |
393 | * The number of bytes in the SCSI NAME STRING field | |
394 | * (i.e., the value in the DESIGNATOR LENGTH field) | |
395 | * shall be no larger than 256 and shall be a multiple | |
396 | * of four. | |
397 | */ | |
398 | if (padding) | |
399 | scsi_name_len += padding; | |
400 | ||
401 | buf[off-1] = scsi_name_len; | |
402 | off += scsi_name_len; | |
403 | /* Header size + Designation descriptor */ | |
404 | len += (scsi_name_len + 4); | |
405 | } | |
406 | buf[2] = ((len >> 8) & 0xff); | |
407 | buf[3] = (len & 0xff); /* Page Length for VPD 0x83 */ | |
408 | return 0; | |
409 | } | |
410 | ||
411 | /* Extended INQUIRY Data VPD Page */ | |
de103c93 CH |
412 | static sense_reason_t |
413 | spc_emulate_evpd_86(struct se_cmd *cmd, unsigned char *buf) | |
1fd032ee CH |
414 | { |
415 | buf[3] = 0x3c; | |
416 | /* Set HEADSUP, ORDSUP, SIMPSUP */ | |
417 | buf[5] = 0x07; | |
418 | ||
419 | /* If WriteCache emulation is enabled, set V_SUP */ | |
0fd97ccf | 420 | if (cmd->se_dev->dev_attrib.emulate_write_cache > 0) |
1fd032ee CH |
421 | buf[6] = 0x01; |
422 | return 0; | |
423 | } | |
424 | ||
425 | /* Block Limits VPD page */ | |
de103c93 CH |
426 | static sense_reason_t |
427 | spc_emulate_evpd_b0(struct se_cmd *cmd, unsigned char *buf) | |
1fd032ee CH |
428 | { |
429 | struct se_device *dev = cmd->se_dev; | |
430 | u32 max_sectors; | |
431 | int have_tp = 0; | |
432 | ||
433 | /* | |
434 | * Following spc3r22 section 6.5.3 Block Limits VPD page, when | |
435 | * emulate_tpu=1 or emulate_tpws=1 we will be expect a | |
436 | * different page length for Thin Provisioning. | |
437 | */ | |
0fd97ccf | 438 | if (dev->dev_attrib.emulate_tpu || dev->dev_attrib.emulate_tpws) |
1fd032ee CH |
439 | have_tp = 1; |
440 | ||
441 | buf[0] = dev->transport->get_device_type(dev); | |
442 | buf[3] = have_tp ? 0x3c : 0x10; | |
443 | ||
444 | /* Set WSNZ to 1 */ | |
445 | buf[4] = 0x01; | |
446 | ||
447 | /* | |
448 | * Set OPTIMAL TRANSFER LENGTH GRANULARITY | |
449 | */ | |
450 | put_unaligned_be16(1, &buf[6]); | |
451 | ||
452 | /* | |
453 | * Set MAXIMUM TRANSFER LENGTH | |
454 | */ | |
0fd97ccf CH |
455 | max_sectors = min(dev->dev_attrib.fabric_max_sectors, |
456 | dev->dev_attrib.hw_max_sectors); | |
1fd032ee CH |
457 | put_unaligned_be32(max_sectors, &buf[8]); |
458 | ||
459 | /* | |
460 | * Set OPTIMAL TRANSFER LENGTH | |
461 | */ | |
0fd97ccf | 462 | put_unaligned_be32(dev->dev_attrib.optimal_sectors, &buf[12]); |
1fd032ee CH |
463 | |
464 | /* | |
465 | * Exit now if we don't support TP. | |
466 | */ | |
467 | if (!have_tp) | |
468 | return 0; | |
469 | ||
470 | /* | |
471 | * Set MAXIMUM UNMAP LBA COUNT | |
472 | */ | |
0fd97ccf | 473 | put_unaligned_be32(dev->dev_attrib.max_unmap_lba_count, &buf[20]); |
1fd032ee CH |
474 | |
475 | /* | |
476 | * Set MAXIMUM UNMAP BLOCK DESCRIPTOR COUNT | |
477 | */ | |
0fd97ccf | 478 | put_unaligned_be32(dev->dev_attrib.max_unmap_block_desc_count, |
1fd032ee CH |
479 | &buf[24]); |
480 | ||
481 | /* | |
482 | * Set OPTIMAL UNMAP GRANULARITY | |
483 | */ | |
0fd97ccf | 484 | put_unaligned_be32(dev->dev_attrib.unmap_granularity, &buf[28]); |
1fd032ee CH |
485 | |
486 | /* | |
487 | * UNMAP GRANULARITY ALIGNMENT | |
488 | */ | |
0fd97ccf | 489 | put_unaligned_be32(dev->dev_attrib.unmap_granularity_alignment, |
1fd032ee | 490 | &buf[32]); |
0fd97ccf | 491 | if (dev->dev_attrib.unmap_granularity_alignment != 0) |
1fd032ee CH |
492 | buf[32] |= 0x80; /* Set the UGAVALID bit */ |
493 | ||
494 | return 0; | |
495 | } | |
496 | ||
497 | /* Block Device Characteristics VPD page */ | |
de103c93 CH |
498 | static sense_reason_t |
499 | spc_emulate_evpd_b1(struct se_cmd *cmd, unsigned char *buf) | |
1fd032ee CH |
500 | { |
501 | struct se_device *dev = cmd->se_dev; | |
502 | ||
503 | buf[0] = dev->transport->get_device_type(dev); | |
504 | buf[3] = 0x3c; | |
0fd97ccf | 505 | buf[5] = dev->dev_attrib.is_nonrot ? 1 : 0; |
1fd032ee CH |
506 | |
507 | return 0; | |
508 | } | |
509 | ||
510 | /* Thin Provisioning VPD */ | |
de103c93 CH |
511 | static sense_reason_t |
512 | spc_emulate_evpd_b2(struct se_cmd *cmd, unsigned char *buf) | |
1fd032ee CH |
513 | { |
514 | struct se_device *dev = cmd->se_dev; | |
515 | ||
516 | /* | |
517 | * From spc3r22 section 6.5.4 Thin Provisioning VPD page: | |
518 | * | |
519 | * The PAGE LENGTH field is defined in SPC-4. If the DP bit is set to | |
520 | * zero, then the page length shall be set to 0004h. If the DP bit | |
521 | * is set to one, then the page length shall be set to the value | |
522 | * defined in table 162. | |
523 | */ | |
524 | buf[0] = dev->transport->get_device_type(dev); | |
525 | ||
526 | /* | |
527 | * Set Hardcoded length mentioned above for DP=0 | |
528 | */ | |
529 | put_unaligned_be16(0x0004, &buf[2]); | |
530 | ||
531 | /* | |
532 | * The THRESHOLD EXPONENT field indicates the threshold set size in | |
533 | * LBAs as a power of 2 (i.e., the threshold set size is equal to | |
534 | * 2(threshold exponent)). | |
535 | * | |
536 | * Note that this is currently set to 0x00 as mkp says it will be | |
537 | * changing again. We can enable this once it has settled in T10 | |
538 | * and is actually used by Linux/SCSI ML code. | |
539 | */ | |
540 | buf[4] = 0x00; | |
541 | ||
542 | /* | |
543 | * A TPU bit set to one indicates that the device server supports | |
544 | * the UNMAP command (see 5.25). A TPU bit set to zero indicates | |
545 | * that the device server does not support the UNMAP command. | |
546 | */ | |
0fd97ccf | 547 | if (dev->dev_attrib.emulate_tpu != 0) |
1fd032ee CH |
548 | buf[5] = 0x80; |
549 | ||
550 | /* | |
551 | * A TPWS bit set to one indicates that the device server supports | |
552 | * the use of the WRITE SAME (16) command (see 5.42) to unmap LBAs. | |
553 | * A TPWS bit set to zero indicates that the device server does not | |
554 | * support the use of the WRITE SAME (16) command to unmap LBAs. | |
555 | */ | |
0fd97ccf | 556 | if (dev->dev_attrib.emulate_tpws != 0) |
1fd032ee CH |
557 | buf[5] |= 0x40; |
558 | ||
559 | return 0; | |
560 | } | |
561 | ||
de103c93 CH |
562 | static sense_reason_t |
563 | spc_emulate_evpd_00(struct se_cmd *cmd, unsigned char *buf); | |
1fd032ee CH |
564 | |
565 | static struct { | |
566 | uint8_t page; | |
de103c93 | 567 | sense_reason_t (*emulate)(struct se_cmd *, unsigned char *); |
1fd032ee CH |
568 | } evpd_handlers[] = { |
569 | { .page = 0x00, .emulate = spc_emulate_evpd_00 }, | |
570 | { .page = 0x80, .emulate = spc_emulate_evpd_80 }, | |
571 | { .page = 0x83, .emulate = spc_emulate_evpd_83 }, | |
572 | { .page = 0x86, .emulate = spc_emulate_evpd_86 }, | |
573 | { .page = 0xb0, .emulate = spc_emulate_evpd_b0 }, | |
574 | { .page = 0xb1, .emulate = spc_emulate_evpd_b1 }, | |
575 | { .page = 0xb2, .emulate = spc_emulate_evpd_b2 }, | |
576 | }; | |
577 | ||
578 | /* supported vital product data pages */ | |
de103c93 CH |
579 | static sense_reason_t |
580 | spc_emulate_evpd_00(struct se_cmd *cmd, unsigned char *buf) | |
1fd032ee CH |
581 | { |
582 | int p; | |
583 | ||
584 | /* | |
585 | * Only report the INQUIRY EVPD=1 pages after a valid NAA | |
586 | * Registered Extended LUN WWN has been set via ConfigFS | |
587 | * during device creation/restart. | |
588 | */ | |
0fd97ccf | 589 | if (cmd->se_dev->dev_flags & DF_EMULATED_VPD_UNIT_SERIAL) { |
1fd032ee CH |
590 | buf[3] = ARRAY_SIZE(evpd_handlers); |
591 | for (p = 0; p < ARRAY_SIZE(evpd_handlers); ++p) | |
592 | buf[p + 4] = evpd_handlers[p].page; | |
593 | } | |
594 | ||
595 | return 0; | |
596 | } | |
597 | ||
de103c93 CH |
598 | static sense_reason_t |
599 | spc_emulate_inquiry(struct se_cmd *cmd) | |
1fd032ee CH |
600 | { |
601 | struct se_device *dev = cmd->se_dev; | |
602 | struct se_portal_group *tpg = cmd->se_lun->lun_sep->sep_tpg; | |
ffe7b0e9 | 603 | unsigned char *rbuf; |
1fd032ee | 604 | unsigned char *cdb = cmd->t_task_cdb; |
ffe7b0e9 | 605 | unsigned char buf[SE_INQUIRY_BUF]; |
de103c93 CH |
606 | sense_reason_t ret; |
607 | int p; | |
1fd032ee | 608 | |
dea5f099 NB |
609 | memset(buf, 0, SE_INQUIRY_BUF); |
610 | ||
1fd032ee CH |
611 | if (dev == tpg->tpg_virt_lun0.lun_se_dev) |
612 | buf[0] = 0x3f; /* Not connected */ | |
613 | else | |
614 | buf[0] = dev->transport->get_device_type(dev); | |
615 | ||
616 | if (!(cdb[1] & 0x1)) { | |
617 | if (cdb[2]) { | |
618 | pr_err("INQUIRY with EVPD==0 but PAGE CODE=%02x\n", | |
619 | cdb[2]); | |
de103c93 | 620 | ret = TCM_INVALID_CDB_FIELD; |
1fd032ee CH |
621 | goto out; |
622 | } | |
623 | ||
624 | ret = spc_emulate_inquiry_std(cmd, buf); | |
625 | goto out; | |
626 | } | |
627 | ||
628 | for (p = 0; p < ARRAY_SIZE(evpd_handlers); ++p) { | |
629 | if (cdb[2] == evpd_handlers[p].page) { | |
630 | buf[1] = cdb[2]; | |
631 | ret = evpd_handlers[p].emulate(cmd, buf); | |
632 | goto out; | |
633 | } | |
634 | } | |
635 | ||
636 | pr_err("Unknown VPD Code: 0x%02x\n", cdb[2]); | |
de103c93 | 637 | ret = TCM_INVALID_CDB_FIELD; |
1fd032ee CH |
638 | |
639 | out: | |
ffe7b0e9 | 640 | rbuf = transport_kmap_data_sg(cmd); |
de103c93 CH |
641 | if (!rbuf) |
642 | return TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; | |
643 | ||
644 | memcpy(rbuf, buf, min_t(u32, sizeof(buf), cmd->data_length)); | |
645 | transport_kunmap_data_sg(cmd); | |
1fd032ee CH |
646 | |
647 | if (!ret) | |
648 | target_complete_cmd(cmd, GOOD); | |
649 | return ret; | |
650 | } | |
651 | ||
d4b2b867 | 652 | static int spc_modesense_rwrecovery(struct se_device *dev, u8 pc, u8 *p) |
1fd032ee CH |
653 | { |
654 | p[0] = 0x01; | |
655 | p[1] = 0x0a; | |
656 | ||
d4b2b867 RD |
657 | /* No changeable values for now */ |
658 | if (pc == 1) | |
659 | goto out; | |
660 | ||
661 | out: | |
1fd032ee CH |
662 | return 12; |
663 | } | |
664 | ||
d4b2b867 | 665 | static int spc_modesense_control(struct se_device *dev, u8 pc, u8 *p) |
1fd032ee CH |
666 | { |
667 | p[0] = 0x0a; | |
668 | p[1] = 0x0a; | |
d4b2b867 RD |
669 | |
670 | /* No changeable values for now */ | |
671 | if (pc == 1) | |
672 | goto out; | |
673 | ||
1fd032ee CH |
674 | p[2] = 2; |
675 | /* | |
676 | * From spc4r23, 7.4.7 Control mode page | |
677 | * | |
678 | * The QUEUE ALGORITHM MODIFIER field (see table 368) specifies | |
679 | * restrictions on the algorithm used for reordering commands | |
680 | * having the SIMPLE task attribute (see SAM-4). | |
681 | * | |
682 | * Table 368 -- QUEUE ALGORITHM MODIFIER field | |
683 | * Code Description | |
684 | * 0h Restricted reordering | |
685 | * 1h Unrestricted reordering allowed | |
686 | * 2h to 7h Reserved | |
687 | * 8h to Fh Vendor specific | |
688 | * | |
689 | * A value of zero in the QUEUE ALGORITHM MODIFIER field specifies that | |
690 | * the device server shall order the processing sequence of commands | |
691 | * having the SIMPLE task attribute such that data integrity is maintained | |
692 | * for that I_T nexus (i.e., if the transmission of new SCSI transport protocol | |
693 | * requests is halted at any time, the final value of all data observable | |
694 | * on the medium shall be the same as if all the commands had been processed | |
695 | * with the ORDERED task attribute). | |
696 | * | |
697 | * A value of one in the QUEUE ALGORITHM MODIFIER field specifies that the | |
698 | * device server may reorder the processing sequence of commands having the | |
699 | * SIMPLE task attribute in any manner. Any data integrity exposures related to | |
700 | * command sequence order shall be explicitly handled by the application client | |
701 | * through the selection of appropriate ommands and task attributes. | |
702 | */ | |
0fd97ccf | 703 | p[3] = (dev->dev_attrib.emulate_rest_reord == 1) ? 0x00 : 0x10; |
1fd032ee CH |
704 | /* |
705 | * From spc4r17, section 7.4.6 Control mode Page | |
706 | * | |
707 | * Unit Attention interlocks control (UN_INTLCK_CTRL) to code 00b | |
708 | * | |
709 | * 00b: The logical unit shall clear any unit attention condition | |
710 | * reported in the same I_T_L_Q nexus transaction as a CHECK CONDITION | |
711 | * status and shall not establish a unit attention condition when a com- | |
712 | * mand is completed with BUSY, TASK SET FULL, or RESERVATION CONFLICT | |
713 | * status. | |
714 | * | |
715 | * 10b: The logical unit shall not clear any unit attention condition | |
716 | * reported in the same I_T_L_Q nexus transaction as a CHECK CONDITION | |
717 | * status and shall not establish a unit attention condition when | |
718 | * a command is completed with BUSY, TASK SET FULL, or RESERVATION | |
719 | * CONFLICT status. | |
720 | * | |
721 | * 11b a The logical unit shall not clear any unit attention condition | |
722 | * reported in the same I_T_L_Q nexus transaction as a CHECK CONDITION | |
723 | * status and shall establish a unit attention condition for the | |
724 | * initiator port associated with the I_T nexus on which the BUSY, | |
725 | * TASK SET FULL, or RESERVATION CONFLICT status is being returned. | |
726 | * Depending on the status, the additional sense code shall be set to | |
727 | * PREVIOUS BUSY STATUS, PREVIOUS TASK SET FULL STATUS, or PREVIOUS | |
728 | * RESERVATION CONFLICT STATUS. Until it is cleared by a REQUEST SENSE | |
729 | * command, a unit attention condition shall be established only once | |
730 | * for a BUSY, TASK SET FULL, or RESERVATION CONFLICT status regardless | |
731 | * to the number of commands completed with one of those status codes. | |
732 | */ | |
0fd97ccf CH |
733 | p[4] = (dev->dev_attrib.emulate_ua_intlck_ctrl == 2) ? 0x30 : |
734 | (dev->dev_attrib.emulate_ua_intlck_ctrl == 1) ? 0x20 : 0x00; | |
1fd032ee CH |
735 | /* |
736 | * From spc4r17, section 7.4.6 Control mode Page | |
737 | * | |
738 | * Task Aborted Status (TAS) bit set to zero. | |
739 | * | |
740 | * A task aborted status (TAS) bit set to zero specifies that aborted | |
741 | * tasks shall be terminated by the device server without any response | |
742 | * to the application client. A TAS bit set to one specifies that tasks | |
743 | * aborted by the actions of an I_T nexus other than the I_T nexus on | |
744 | * which the command was received shall be completed with TASK ABORTED | |
745 | * status (see SAM-4). | |
746 | */ | |
0fd97ccf | 747 | p[5] = (dev->dev_attrib.emulate_tas) ? 0x40 : 0x00; |
1fd032ee CH |
748 | p[8] = 0xff; |
749 | p[9] = 0xff; | |
750 | p[11] = 30; | |
751 | ||
d4b2b867 | 752 | out: |
1fd032ee CH |
753 | return 12; |
754 | } | |
755 | ||
d4b2b867 | 756 | static int spc_modesense_caching(struct se_device *dev, u8 pc, u8 *p) |
1fd032ee CH |
757 | { |
758 | p[0] = 0x08; | |
759 | p[1] = 0x12; | |
d4b2b867 RD |
760 | |
761 | /* No changeable values for now */ | |
762 | if (pc == 1) | |
763 | goto out; | |
764 | ||
0fd97ccf | 765 | if (dev->dev_attrib.emulate_write_cache > 0) |
1fd032ee CH |
766 | p[2] = 0x04; /* Write Cache Enable */ |
767 | p[12] = 0x20; /* Disabled Read Ahead */ | |
768 | ||
d4b2b867 | 769 | out: |
1fd032ee CH |
770 | return 20; |
771 | } | |
772 | ||
0f6d64ce RD |
773 | static int spc_modesense_informational_exceptions(struct se_device *dev, u8 pc, unsigned char *p) |
774 | { | |
775 | p[0] = 0x1c; | |
776 | p[1] = 0x0a; | |
777 | ||
778 | /* No changeable values for now */ | |
779 | if (pc == 1) | |
780 | goto out; | |
781 | ||
782 | out: | |
783 | return 12; | |
784 | } | |
785 | ||
d4b2b867 RD |
786 | static struct { |
787 | uint8_t page; | |
788 | uint8_t subpage; | |
789 | int (*emulate)(struct se_device *, u8, unsigned char *); | |
790 | } modesense_handlers[] = { | |
791 | { .page = 0x01, .subpage = 0x00, .emulate = spc_modesense_rwrecovery }, | |
792 | { .page = 0x08, .subpage = 0x00, .emulate = spc_modesense_caching }, | |
793 | { .page = 0x0a, .subpage = 0x00, .emulate = spc_modesense_control }, | |
0f6d64ce | 794 | { .page = 0x1c, .subpage = 0x00, .emulate = spc_modesense_informational_exceptions }, |
d4b2b867 RD |
795 | }; |
796 | ||
1fd032ee CH |
797 | static void spc_modesense_write_protect(unsigned char *buf, int type) |
798 | { | |
799 | /* | |
800 | * I believe that the WP bit (bit 7) in the mode header is the same for | |
801 | * all device types.. | |
802 | */ | |
803 | switch (type) { | |
804 | case TYPE_DISK: | |
805 | case TYPE_TAPE: | |
806 | default: | |
807 | buf[0] |= 0x80; /* WP bit */ | |
808 | break; | |
809 | } | |
810 | } | |
811 | ||
812 | static void spc_modesense_dpofua(unsigned char *buf, int type) | |
813 | { | |
814 | switch (type) { | |
815 | case TYPE_DISK: | |
816 | buf[0] |= 0x10; /* DPOFUA bit */ | |
817 | break; | |
818 | default: | |
819 | break; | |
820 | } | |
821 | } | |
822 | ||
d4b2b867 RD |
823 | static int spc_modesense_blockdesc(unsigned char *buf, u64 blocks, u32 block_size) |
824 | { | |
825 | *buf++ = 8; | |
826 | put_unaligned_be32(min(blocks, 0xffffffffull), buf); | |
827 | buf += 4; | |
828 | put_unaligned_be32(block_size, buf); | |
829 | return 9; | |
830 | } | |
831 | ||
832 | static int spc_modesense_long_blockdesc(unsigned char *buf, u64 blocks, u32 block_size) | |
833 | { | |
834 | if (blocks <= 0xffffffff) | |
835 | return spc_modesense_blockdesc(buf + 3, blocks, block_size) + 3; | |
836 | ||
837 | *buf++ = 1; /* LONGLBA */ | |
838 | buf += 2; | |
839 | *buf++ = 16; | |
840 | put_unaligned_be64(blocks, buf); | |
841 | buf += 12; | |
842 | put_unaligned_be32(block_size, buf); | |
843 | ||
844 | return 17; | |
845 | } | |
846 | ||
de103c93 | 847 | static sense_reason_t spc_emulate_modesense(struct se_cmd *cmd) |
1fd032ee CH |
848 | { |
849 | struct se_device *dev = cmd->se_dev; | |
850 | char *cdb = cmd->t_task_cdb; | |
d4b2b867 | 851 | unsigned char *buf, *map_buf; |
1fd032ee CH |
852 | int type = dev->transport->get_device_type(dev); |
853 | int ten = (cmd->t_task_cdb[0] == MODE_SENSE_10); | |
d4b2b867 RD |
854 | bool dbd = !!(cdb[1] & 0x08); |
855 | bool llba = ten ? !!(cdb[1] & 0x10) : false; | |
856 | u8 pc = cdb[2] >> 6; | |
857 | u8 page = cdb[2] & 0x3f; | |
858 | u8 subpage = cdb[3]; | |
1fd032ee | 859 | int length = 0; |
d4b2b867 RD |
860 | int ret; |
861 | int i; | |
1fd032ee | 862 | |
d4b2b867 | 863 | map_buf = transport_kmap_data_sg(cmd); |
de103c93 CH |
864 | if (!map_buf) |
865 | return TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; | |
d4b2b867 RD |
866 | /* |
867 | * If SCF_PASSTHROUGH_SG_TO_MEM_NOALLOC is not set, then we | |
868 | * know we actually allocated a full page. Otherwise, if the | |
869 | * data buffer is too small, allocate a temporary buffer so we | |
870 | * don't have to worry about overruns in all our INQUIRY | |
871 | * emulation handling. | |
872 | */ | |
873 | if (cmd->data_length < SE_MODE_PAGE_BUF && | |
874 | (cmd->se_cmd_flags & SCF_PASSTHROUGH_SG_TO_MEM_NOALLOC)) { | |
875 | buf = kzalloc(SE_MODE_PAGE_BUF, GFP_KERNEL); | |
876 | if (!buf) { | |
877 | transport_kunmap_data_sg(cmd); | |
de103c93 | 878 | return TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; |
d4b2b867 RD |
879 | } |
880 | } else { | |
881 | buf = map_buf; | |
1fd032ee | 882 | } |
fecae40a NB |
883 | /* |
884 | * Skip over MODE DATA LENGTH + MEDIUM TYPE fields to byte 3 for | |
885 | * MODE_SENSE_10 and byte 2 for MODE_SENSE (6). | |
886 | */ | |
887 | length = ten ? 3 : 2; | |
d4b2b867 RD |
888 | |
889 | /* DEVICE-SPECIFIC PARAMETER */ | |
890 | if ((cmd->se_lun->lun_access & TRANSPORT_LUNFLAGS_READ_ONLY) || | |
891 | (cmd->se_deve && | |
892 | (cmd->se_deve->lun_flags & TRANSPORT_LUNFLAGS_READ_ONLY))) | |
893 | spc_modesense_write_protect(&buf[length], type); | |
894 | ||
895 | if ((dev->dev_attrib.emulate_write_cache > 0) && | |
896 | (dev->dev_attrib.emulate_fua_write > 0)) | |
897 | spc_modesense_dpofua(&buf[length], type); | |
898 | ||
899 | ++length; | |
900 | ||
901 | /* BLOCK DESCRIPTOR */ | |
902 | ||
903 | /* | |
904 | * For now we only include a block descriptor for disk (SBC) | |
905 | * devices; other command sets use a slightly different format. | |
906 | */ | |
907 | if (!dbd && type == TYPE_DISK) { | |
908 | u64 blocks = dev->transport->get_blocks(dev); | |
909 | u32 block_size = dev->dev_attrib.block_size; | |
910 | ||
911 | if (ten) { | |
912 | if (llba) { | |
913 | length += spc_modesense_long_blockdesc(&buf[length], | |
914 | blocks, block_size); | |
915 | } else { | |
916 | length += 3; | |
917 | length += spc_modesense_blockdesc(&buf[length], | |
918 | blocks, block_size); | |
919 | } | |
920 | } else { | |
921 | length += spc_modesense_blockdesc(&buf[length], blocks, | |
922 | block_size); | |
923 | } | |
1fd032ee | 924 | } else { |
d4b2b867 RD |
925 | if (ten) |
926 | length += 4; | |
927 | else | |
928 | length += 1; | |
1fd032ee CH |
929 | } |
930 | ||
d4b2b867 RD |
931 | if (page == 0x3f) { |
932 | if (subpage != 0x00 && subpage != 0xff) { | |
de103c93 CH |
933 | pr_warn("MODE_SENSE: Invalid subpage code: 0x%02x\n", subpage); |
934 | kfree(buf); | |
935 | transport_kunmap_data_sg(cmd); | |
936 | return TCM_INVALID_CDB_FIELD; | |
d4b2b867 RD |
937 | } |
938 | ||
939 | for (i = 0; i < ARRAY_SIZE(modesense_handlers); ++i) { | |
940 | /* | |
941 | * Tricky way to say all subpage 00h for | |
942 | * subpage==0, all subpages for subpage==0xff | |
943 | * (and we just checked above that those are | |
944 | * the only two possibilities). | |
945 | */ | |
946 | if ((modesense_handlers[i].subpage & ~subpage) == 0) { | |
947 | ret = modesense_handlers[i].emulate(dev, pc, &buf[length]); | |
948 | if (!ten && length + ret >= 255) | |
949 | break; | |
950 | length += ret; | |
951 | } | |
952 | } | |
953 | ||
954 | goto set_length; | |
955 | } | |
956 | ||
957 | for (i = 0; i < ARRAY_SIZE(modesense_handlers); ++i) | |
958 | if (modesense_handlers[i].page == page && | |
959 | modesense_handlers[i].subpage == subpage) { | |
960 | length += modesense_handlers[i].emulate(dev, pc, &buf[length]); | |
961 | goto set_length; | |
962 | } | |
963 | ||
964 | /* | |
965 | * We don't intend to implement: | |
966 | * - obsolete page 03h "format parameters" (checked by Solaris) | |
967 | */ | |
968 | if (page != 0x03) | |
969 | pr_err("MODE SENSE: unimplemented page/subpage: 0x%02x/0x%02x\n", | |
970 | page, subpage); | |
971 | ||
de103c93 CH |
972 | transport_kunmap_data_sg(cmd); |
973 | return TCM_UNKNOWN_MODE_PAGE; | |
d4b2b867 RD |
974 | |
975 | set_length: | |
976 | if (ten) | |
977 | put_unaligned_be16(length - 2, buf); | |
978 | else | |
979 | buf[0] = length - 1; | |
980 | ||
d4b2b867 RD |
981 | if (buf != map_buf) { |
982 | memcpy(map_buf, buf, cmd->data_length); | |
983 | kfree(buf); | |
7a3f369c | 984 | } |
1fd032ee | 985 | |
d4b2b867 | 986 | transport_kunmap_data_sg(cmd); |
1fd032ee CH |
987 | target_complete_cmd(cmd, GOOD); |
988 | return 0; | |
989 | } | |
990 | ||
de103c93 | 991 | static sense_reason_t spc_emulate_modeselect(struct se_cmd *cmd) |
3a3c5e4a RD |
992 | { |
993 | struct se_device *dev = cmd->se_dev; | |
994 | char *cdb = cmd->t_task_cdb; | |
995 | bool ten = cdb[0] == MODE_SELECT_10; | |
996 | int off = ten ? 8 : 4; | |
997 | bool pf = !!(cdb[1] & 0x10); | |
998 | u8 page, subpage; | |
999 | unsigned char *buf; | |
1000 | unsigned char tbuf[SE_MODE_PAGE_BUF]; | |
1001 | int length; | |
1002 | int ret = 0; | |
1003 | int i; | |
1004 | ||
1005 | buf = transport_kmap_data_sg(cmd); | |
de103c93 CH |
1006 | if (!buf) |
1007 | return TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; | |
3a3c5e4a RD |
1008 | |
1009 | if (!pf) { | |
de103c93 | 1010 | ret = TCM_INVALID_CDB_FIELD; |
3a3c5e4a RD |
1011 | goto out; |
1012 | } | |
1013 | ||
1014 | page = buf[off] & 0x3f; | |
1015 | subpage = buf[off] & 0x40 ? buf[off + 1] : 0; | |
1016 | ||
1017 | for (i = 0; i < ARRAY_SIZE(modesense_handlers); ++i) | |
1018 | if (modesense_handlers[i].page == page && | |
1019 | modesense_handlers[i].subpage == subpage) { | |
1020 | memset(tbuf, 0, SE_MODE_PAGE_BUF); | |
1021 | length = modesense_handlers[i].emulate(dev, 0, tbuf); | |
1022 | goto check_contents; | |
1023 | } | |
1024 | ||
de103c93 | 1025 | ret = TCM_UNKNOWN_MODE_PAGE; |
3a3c5e4a RD |
1026 | goto out; |
1027 | ||
1028 | check_contents: | |
de103c93 CH |
1029 | if (memcmp(buf + off, tbuf, length)) |
1030 | ret = TCM_INVALID_PARAMETER_LIST; | |
3a3c5e4a RD |
1031 | |
1032 | out: | |
1033 | transport_kunmap_data_sg(cmd); | |
1034 | ||
1035 | if (!ret) | |
1036 | target_complete_cmd(cmd, GOOD); | |
1037 | return ret; | |
1038 | } | |
1039 | ||
de103c93 | 1040 | static sense_reason_t spc_emulate_request_sense(struct se_cmd *cmd) |
1fd032ee CH |
1041 | { |
1042 | unsigned char *cdb = cmd->t_task_cdb; | |
32a8811f | 1043 | unsigned char *rbuf; |
1fd032ee | 1044 | u8 ua_asc = 0, ua_ascq = 0; |
32a8811f PB |
1045 | unsigned char buf[SE_SENSE_BUF]; |
1046 | ||
1047 | memset(buf, 0, SE_SENSE_BUF); | |
1fd032ee CH |
1048 | |
1049 | if (cdb[1] & 0x01) { | |
1050 | pr_err("REQUEST_SENSE description emulation not" | |
1051 | " supported\n"); | |
de103c93 | 1052 | return TCM_INVALID_CDB_FIELD; |
1fd032ee CH |
1053 | } |
1054 | ||
32a8811f | 1055 | rbuf = transport_kmap_data_sg(cmd); |
de103c93 CH |
1056 | if (!rbuf) |
1057 | return TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; | |
1058 | ||
1059 | if (!core_scsi3_ua_clear_for_request_sense(cmd, &ua_asc, &ua_ascq)) { | |
1fd032ee CH |
1060 | /* |
1061 | * CURRENT ERROR, UNIT ATTENTION | |
1062 | */ | |
1063 | buf[0] = 0x70; | |
1064 | buf[SPC_SENSE_KEY_OFFSET] = UNIT_ATTENTION; | |
1065 | ||
1fd032ee CH |
1066 | /* |
1067 | * The Additional Sense Code (ASC) from the UNIT ATTENTION | |
1068 | */ | |
1069 | buf[SPC_ASC_KEY_OFFSET] = ua_asc; | |
1070 | buf[SPC_ASCQ_KEY_OFFSET] = ua_ascq; | |
1071 | buf[7] = 0x0A; | |
1072 | } else { | |
1073 | /* | |
1074 | * CURRENT ERROR, NO SENSE | |
1075 | */ | |
1076 | buf[0] = 0x70; | |
1077 | buf[SPC_SENSE_KEY_OFFSET] = NO_SENSE; | |
1078 | ||
1fd032ee CH |
1079 | /* |
1080 | * NO ADDITIONAL SENSE INFORMATION | |
1081 | */ | |
1082 | buf[SPC_ASC_KEY_OFFSET] = 0x00; | |
1083 | buf[7] = 0x0A; | |
1084 | } | |
1085 | ||
de103c93 CH |
1086 | memcpy(rbuf, buf, min_t(u32, sizeof(buf), cmd->data_length)); |
1087 | transport_kunmap_data_sg(cmd); | |
32a8811f | 1088 | |
1fd032ee CH |
1089 | target_complete_cmd(cmd, GOOD); |
1090 | return 0; | |
1091 | } | |
1092 | ||
de103c93 | 1093 | sense_reason_t spc_emulate_report_luns(struct se_cmd *cmd) |
d1b1f805 CH |
1094 | { |
1095 | struct se_dev_entry *deve; | |
1096 | struct se_session *sess = cmd->se_sess; | |
1097 | unsigned char *buf; | |
1098 | u32 lun_count = 0, offset = 8, i; | |
1099 | ||
1100 | if (cmd->data_length < 16) { | |
1101 | pr_warn("REPORT LUNS allocation length %u too small\n", | |
1102 | cmd->data_length); | |
de103c93 | 1103 | return TCM_INVALID_CDB_FIELD; |
d1b1f805 CH |
1104 | } |
1105 | ||
1106 | buf = transport_kmap_data_sg(cmd); | |
1107 | if (!buf) | |
de103c93 | 1108 | return TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; |
d1b1f805 CH |
1109 | |
1110 | /* | |
1111 | * If no struct se_session pointer is present, this struct se_cmd is | |
1112 | * coming via a target_core_mod PASSTHROUGH op, and not through | |
1113 | * a $FABRIC_MOD. In that case, report LUN=0 only. | |
1114 | */ | |
1115 | if (!sess) { | |
1116 | int_to_scsilun(0, (struct scsi_lun *)&buf[offset]); | |
1117 | lun_count = 1; | |
1118 | goto done; | |
1119 | } | |
1120 | ||
1121 | spin_lock_irq(&sess->se_node_acl->device_list_lock); | |
1122 | for (i = 0; i < TRANSPORT_MAX_LUNS_PER_TPG; i++) { | |
1123 | deve = sess->se_node_acl->device_list[i]; | |
1124 | if (!(deve->lun_flags & TRANSPORT_LUNFLAGS_INITIATOR_ACCESS)) | |
1125 | continue; | |
1126 | /* | |
1127 | * We determine the correct LUN LIST LENGTH even once we | |
1128 | * have reached the initial allocation length. | |
1129 | * See SPC2-R20 7.19. | |
1130 | */ | |
1131 | lun_count++; | |
1132 | if ((offset + 8) > cmd->data_length) | |
1133 | continue; | |
1134 | ||
1135 | int_to_scsilun(deve->mapped_lun, (struct scsi_lun *)&buf[offset]); | |
1136 | offset += 8; | |
1137 | } | |
1138 | spin_unlock_irq(&sess->se_node_acl->device_list_lock); | |
1139 | ||
1140 | /* | |
1141 | * See SPC3 r07, page 159. | |
1142 | */ | |
1143 | done: | |
1144 | lun_count *= 8; | |
1145 | buf[0] = ((lun_count >> 24) & 0xff); | |
1146 | buf[1] = ((lun_count >> 16) & 0xff); | |
1147 | buf[2] = ((lun_count >> 8) & 0xff); | |
1148 | buf[3] = (lun_count & 0xff); | |
1149 | transport_kunmap_data_sg(cmd); | |
1150 | ||
1151 | target_complete_cmd(cmd, GOOD); | |
1152 | return 0; | |
1153 | } | |
8de530a5 | 1154 | EXPORT_SYMBOL(spc_emulate_report_luns); |
d1b1f805 | 1155 | |
de103c93 CH |
1156 | static sense_reason_t |
1157 | spc_emulate_testunitready(struct se_cmd *cmd) | |
1fd032ee CH |
1158 | { |
1159 | target_complete_cmd(cmd, GOOD); | |
1160 | return 0; | |
1161 | } | |
1162 | ||
de103c93 CH |
1163 | sense_reason_t |
1164 | spc_parse_cdb(struct se_cmd *cmd, unsigned int *size) | |
88455ec4 | 1165 | { |
eba2ca45 | 1166 | struct se_device *dev = cmd->se_dev; |
88455ec4 CH |
1167 | unsigned char *cdb = cmd->t_task_cdb; |
1168 | ||
1169 | switch (cdb[0]) { | |
1170 | case MODE_SELECT: | |
1171 | *size = cdb[4]; | |
3a3c5e4a | 1172 | cmd->execute_cmd = spc_emulate_modeselect; |
88455ec4 CH |
1173 | break; |
1174 | case MODE_SELECT_10: | |
1175 | *size = (cdb[7] << 8) + cdb[8]; | |
3a3c5e4a | 1176 | cmd->execute_cmd = spc_emulate_modeselect; |
88455ec4 CH |
1177 | break; |
1178 | case MODE_SENSE: | |
1179 | *size = cdb[4]; | |
1fd032ee | 1180 | cmd->execute_cmd = spc_emulate_modesense; |
88455ec4 CH |
1181 | break; |
1182 | case MODE_SENSE_10: | |
1183 | *size = (cdb[7] << 8) + cdb[8]; | |
1fd032ee | 1184 | cmd->execute_cmd = spc_emulate_modesense; |
88455ec4 CH |
1185 | break; |
1186 | case LOG_SELECT: | |
1187 | case LOG_SENSE: | |
1188 | *size = (cdb[7] << 8) + cdb[8]; | |
1189 | break; | |
1190 | case PERSISTENT_RESERVE_IN: | |
88455ec4 | 1191 | *size = (cdb[7] << 8) + cdb[8]; |
d977f437 | 1192 | cmd->execute_cmd = target_scsi3_emulate_pr_in; |
88455ec4 CH |
1193 | break; |
1194 | case PERSISTENT_RESERVE_OUT: | |
88455ec4 | 1195 | *size = (cdb[7] << 8) + cdb[8]; |
d977f437 | 1196 | cmd->execute_cmd = target_scsi3_emulate_pr_out; |
88455ec4 CH |
1197 | break; |
1198 | case RELEASE: | |
1199 | case RELEASE_10: | |
1200 | if (cdb[0] == RELEASE_10) | |
1201 | *size = (cdb[7] << 8) | cdb[8]; | |
1202 | else | |
1203 | *size = cmd->data_length; | |
1204 | ||
d977f437 | 1205 | cmd->execute_cmd = target_scsi2_reservation_release; |
88455ec4 CH |
1206 | break; |
1207 | case RESERVE: | |
1208 | case RESERVE_10: | |
1209 | /* | |
1210 | * The SPC-2 RESERVE does not contain a size in the SCSI CDB. | |
1211 | * Assume the passthrough or $FABRIC_MOD will tell us about it. | |
1212 | */ | |
1213 | if (cdb[0] == RESERVE_10) | |
1214 | *size = (cdb[7] << 8) | cdb[8]; | |
1215 | else | |
1216 | *size = cmd->data_length; | |
1217 | ||
d977f437 | 1218 | cmd->execute_cmd = target_scsi2_reservation_reserve; |
88455ec4 CH |
1219 | break; |
1220 | case REQUEST_SENSE: | |
1221 | *size = cdb[4]; | |
1fd032ee | 1222 | cmd->execute_cmd = spc_emulate_request_sense; |
88455ec4 CH |
1223 | break; |
1224 | case INQUIRY: | |
1225 | *size = (cdb[3] << 8) + cdb[4]; | |
1226 | ||
1227 | /* | |
1228 | * Do implict HEAD_OF_QUEUE processing for INQUIRY. | |
1229 | * See spc4r17 section 5.3 | |
1230 | */ | |
019c4ca6 | 1231 | cmd->sam_task_attr = MSG_HEAD_TAG; |
1fd032ee | 1232 | cmd->execute_cmd = spc_emulate_inquiry; |
88455ec4 CH |
1233 | break; |
1234 | case SECURITY_PROTOCOL_IN: | |
1235 | case SECURITY_PROTOCOL_OUT: | |
1236 | *size = (cdb[6] << 24) | (cdb[7] << 16) | (cdb[8] << 8) | cdb[9]; | |
1237 | break; | |
1238 | case EXTENDED_COPY: | |
1239 | case READ_ATTRIBUTE: | |
1240 | case RECEIVE_COPY_RESULTS: | |
1241 | case WRITE_ATTRIBUTE: | |
1242 | *size = (cdb[10] << 24) | (cdb[11] << 16) | | |
1243 | (cdb[12] << 8) | cdb[13]; | |
1244 | break; | |
1245 | case RECEIVE_DIAGNOSTIC: | |
1246 | case SEND_DIAGNOSTIC: | |
1247 | *size = (cdb[3] << 8) | cdb[4]; | |
1248 | break; | |
1249 | case WRITE_BUFFER: | |
1250 | *size = (cdb[6] << 16) + (cdb[7] << 8) + cdb[8]; | |
1251 | break; | |
1252 | case REPORT_LUNS: | |
d1b1f805 | 1253 | cmd->execute_cmd = spc_emulate_report_luns; |
88455ec4 CH |
1254 | *size = (cdb[6] << 24) | (cdb[7] << 16) | (cdb[8] << 8) | cdb[9]; |
1255 | /* | |
1256 | * Do implict HEAD_OF_QUEUE processing for REPORT_LUNS | |
1257 | * See spc4r17 section 5.3 | |
1258 | */ | |
019c4ca6 | 1259 | cmd->sam_task_attr = MSG_HEAD_TAG; |
88455ec4 CH |
1260 | break; |
1261 | case TEST_UNIT_READY: | |
1fd032ee | 1262 | cmd->execute_cmd = spc_emulate_testunitready; |
d6e0175c | 1263 | *size = 0; |
88455ec4 | 1264 | break; |
eba2ca45 NB |
1265 | case MAINTENANCE_IN: |
1266 | if (dev->transport->get_device_type(dev) != TYPE_ROM) { | |
1267 | /* | |
1268 | * MAINTENANCE_IN from SCC-2 | |
1269 | * Check for emulated MI_REPORT_TARGET_PGS | |
1270 | */ | |
c87fbd56 | 1271 | if ((cdb[1] & 0x1f) == MI_REPORT_TARGET_PGS) { |
eba2ca45 NB |
1272 | cmd->execute_cmd = |
1273 | target_emulate_report_target_port_groups; | |
1274 | } | |
1275 | *size = get_unaligned_be32(&cdb[6]); | |
1276 | } else { | |
1277 | /* | |
1278 | * GPCMD_SEND_KEY from multi media commands | |
1279 | */ | |
1280 | *size = get_unaligned_be16(&cdb[8]); | |
1281 | } | |
1282 | break; | |
1283 | case MAINTENANCE_OUT: | |
1284 | if (dev->transport->get_device_type(dev) != TYPE_ROM) { | |
1285 | /* | |
1286 | * MAINTENANCE_OUT from SCC-2 | |
1287 | * Check for emulated MO_SET_TARGET_PGS. | |
1288 | */ | |
c87fbd56 | 1289 | if (cdb[1] == MO_SET_TARGET_PGS) { |
eba2ca45 NB |
1290 | cmd->execute_cmd = |
1291 | target_emulate_set_target_port_groups; | |
1292 | } | |
1293 | *size = get_unaligned_be32(&cdb[6]); | |
1294 | } else { | |
1295 | /* | |
1296 | * GPCMD_SEND_KEY from multi media commands | |
1297 | */ | |
1298 | *size = get_unaligned_be16(&cdb[8]); | |
1299 | } | |
1300 | break; | |
88455ec4 CH |
1301 | default: |
1302 | pr_warn("TARGET_CORE[%s]: Unsupported SCSI Opcode" | |
1303 | " 0x%02x, sending CHECK_CONDITION.\n", | |
1304 | cmd->se_tfo->get_fabric_name(), cdb[0]); | |
de103c93 | 1305 | return TCM_UNSUPPORTED_SCSI_OPCODE; |
88455ec4 CH |
1306 | } |
1307 | ||
1308 | return 0; | |
1309 | } | |
1310 | EXPORT_SYMBOL(spc_parse_cdb); |