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