Commit | Line | Data |
---|---|---|
c66ac9db NB |
1 | /* |
2 | * CDB emulation for non-READ/WRITE commands. | |
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 | ||
11650b85 | 26 | #include <linux/kernel.h> |
c66ac9db NB |
27 | #include <asm/unaligned.h> |
28 | #include <scsi/scsi.h> | |
29 | ||
30 | #include <target/target_core_base.h> | |
31 | #include <target/target_core_transport.h> | |
32 | #include <target/target_core_fabric_ops.h> | |
33 | #include "target_core_ua.h" | |
34 | ||
35 | static void | |
36 | target_fill_alua_data(struct se_port *port, unsigned char *buf) | |
37 | { | |
38 | struct t10_alua_tg_pt_gp *tg_pt_gp; | |
39 | struct t10_alua_tg_pt_gp_member *tg_pt_gp_mem; | |
40 | ||
41 | /* | |
42 | * Set SCCS for MAINTENANCE_IN + REPORT_TARGET_PORT_GROUPS. | |
43 | */ | |
44 | buf[5] = 0x80; | |
45 | ||
46 | /* | |
47 | * Set TPGS field for explict and/or implict ALUA access type | |
48 | * and opteration. | |
49 | * | |
50 | * See spc4r17 section 6.4.2 Table 135 | |
51 | */ | |
52 | if (!port) | |
53 | return; | |
54 | tg_pt_gp_mem = port->sep_alua_tg_pt_gp_mem; | |
55 | if (!tg_pt_gp_mem) | |
56 | return; | |
57 | ||
58 | spin_lock(&tg_pt_gp_mem->tg_pt_gp_mem_lock); | |
59 | tg_pt_gp = tg_pt_gp_mem->tg_pt_gp; | |
60 | if (tg_pt_gp) | |
61 | buf[5] |= tg_pt_gp->tg_pt_gp_alua_access_type; | |
62 | spin_unlock(&tg_pt_gp_mem->tg_pt_gp_mem_lock); | |
63 | } | |
64 | ||
65 | static int | |
66 | target_emulate_inquiry_std(struct se_cmd *cmd) | |
67 | { | |
e3d6f909 | 68 | struct se_lun *lun = cmd->se_lun; |
5951146d | 69 | struct se_device *dev = cmd->se_dev; |
052605c6 | 70 | struct se_portal_group *tpg = lun->lun_sep->sep_tpg; |
05d1c7c0 | 71 | unsigned char *buf; |
c66ac9db NB |
72 | |
73 | /* | |
74 | * Make sure we at least have 6 bytes of INQUIRY response | |
75 | * payload going back for EVPD=0 | |
76 | */ | |
77 | if (cmd->data_length < 6) { | |
6708bb27 | 78 | pr_err("SCSI Inquiry payload length: %u" |
c66ac9db | 79 | " too small for EVPD=0\n", cmd->data_length); |
e3d6f909 | 80 | return -EINVAL; |
c66ac9db NB |
81 | } |
82 | ||
05d1c7c0 AG |
83 | buf = transport_kmap_first_data_page(cmd); |
84 | ||
052605c6 NB |
85 | if (dev == tpg->tpg_virt_lun0.lun_se_dev) { |
86 | buf[0] = 0x3f; /* Not connected */ | |
87 | } else { | |
88 | buf[0] = dev->transport->get_device_type(dev); | |
89 | if (buf[0] == TYPE_TAPE) | |
90 | buf[1] = 0x80; | |
91 | } | |
c66ac9db NB |
92 | buf[2] = dev->transport->get_device_rev(dev); |
93 | ||
94 | /* | |
95 | * Enable SCCS and TPGS fields for Emulated ALUA | |
96 | */ | |
e3d6f909 | 97 | if (dev->se_sub_dev->t10_alua.alua_type == SPC3_ALUA_EMULATED) |
c66ac9db NB |
98 | target_fill_alua_data(lun->lun_sep, buf); |
99 | ||
100 | if (cmd->data_length < 8) { | |
101 | buf[4] = 1; /* Set additional length to 1 */ | |
05d1c7c0 | 102 | goto out; |
c66ac9db NB |
103 | } |
104 | ||
105 | buf[7] = 0x32; /* Sync=1 and CmdQue=1 */ | |
106 | ||
107 | /* | |
108 | * Do not include vendor, product, reversion info in INQUIRY | |
109 | * response payload for cdbs with a small allocation length. | |
110 | */ | |
111 | if (cmd->data_length < 36) { | |
112 | buf[4] = 3; /* Set additional length to 3 */ | |
05d1c7c0 | 113 | goto out; |
c66ac9db NB |
114 | } |
115 | ||
116 | snprintf((unsigned char *)&buf[8], 8, "LIO-ORG"); | |
117 | snprintf((unsigned char *)&buf[16], 16, "%s", | |
e3d6f909 | 118 | &dev->se_sub_dev->t10_wwn.model[0]); |
c66ac9db | 119 | snprintf((unsigned char *)&buf[32], 4, "%s", |
e3d6f909 | 120 | &dev->se_sub_dev->t10_wwn.revision[0]); |
c66ac9db | 121 | buf[4] = 31; /* Set additional length to 31 */ |
05d1c7c0 AG |
122 | |
123 | out: | |
124 | transport_kunmap_first_data_page(cmd); | |
c66ac9db NB |
125 | return 0; |
126 | } | |
127 | ||
c66ac9db NB |
128 | /* unit serial number */ |
129 | static int | |
130 | target_emulate_evpd_80(struct se_cmd *cmd, unsigned char *buf) | |
131 | { | |
5951146d | 132 | struct se_device *dev = cmd->se_dev; |
c66ac9db NB |
133 | u16 len = 0; |
134 | ||
c66ac9db NB |
135 | if (dev->se_sub_dev->su_dev_flags & |
136 | SDF_EMULATED_VPD_UNIT_SERIAL) { | |
137 | u32 unit_serial_len; | |
138 | ||
139 | unit_serial_len = | |
e3d6f909 | 140 | strlen(&dev->se_sub_dev->t10_wwn.unit_serial[0]); |
c66ac9db NB |
141 | unit_serial_len++; /* For NULL Terminator */ |
142 | ||
143 | if (((len + 4) + unit_serial_len) > cmd->data_length) { | |
144 | len += unit_serial_len; | |
145 | buf[2] = ((len >> 8) & 0xff); | |
146 | buf[3] = (len & 0xff); | |
147 | return 0; | |
148 | } | |
149 | len += sprintf((unsigned char *)&buf[4], "%s", | |
e3d6f909 | 150 | &dev->se_sub_dev->t10_wwn.unit_serial[0]); |
c66ac9db NB |
151 | len++; /* Extra Byte for NULL Terminator */ |
152 | buf[3] = len; | |
153 | } | |
154 | return 0; | |
155 | } | |
156 | ||
784eb99e | 157 | static void |
b6b4e61f | 158 | target_parse_naa_6h_vendor_specific(struct se_device *dev, unsigned char *buf) |
784eb99e NB |
159 | { |
160 | unsigned char *p = &dev->se_sub_dev->t10_wwn.unit_serial[0]; | |
b6b4e61f AS |
161 | int cnt; |
162 | bool next = true; | |
163 | ||
784eb99e NB |
164 | /* |
165 | * Generate up to 36 bits of VENDOR SPECIFIC IDENTIFIER starting on | |
166 | * byte 3 bit 3-0 for NAA IEEE Registered Extended DESIGNATOR field | |
167 | * format, followed by 64 bits of VENDOR SPECIFIC IDENTIFIER EXTENSION | |
168 | * to complete the payload. These are based from VPD=0x80 PRODUCT SERIAL | |
169 | * NUMBER set via vpd_unit_serial in target_core_configfs.c to ensure | |
170 | * per device uniqeness. | |
171 | */ | |
b6b4e61f AS |
172 | for (cnt = 0; *p && cnt < 13; p++) { |
173 | int val = hex_to_bin(*p); | |
174 | ||
175 | if (val < 0) | |
784eb99e | 176 | continue; |
b6b4e61f AS |
177 | |
178 | if (next) { | |
179 | next = false; | |
180 | buf[cnt++] |= val; | |
784eb99e | 181 | } else { |
b6b4e61f AS |
182 | next = true; |
183 | buf[cnt] = val << 4; | |
784eb99e NB |
184 | } |
185 | } | |
186 | } | |
187 | ||
c66ac9db NB |
188 | /* |
189 | * Device identification VPD, for a complete list of | |
190 | * DESIGNATOR TYPEs see spc4r17 Table 459. | |
191 | */ | |
192 | static int | |
193 | target_emulate_evpd_83(struct se_cmd *cmd, unsigned char *buf) | |
194 | { | |
5951146d | 195 | struct se_device *dev = cmd->se_dev; |
e3d6f909 | 196 | struct se_lun *lun = cmd->se_lun; |
c66ac9db NB |
197 | struct se_port *port = NULL; |
198 | struct se_portal_group *tpg = NULL; | |
199 | struct t10_alua_lu_gp_member *lu_gp_mem; | |
200 | struct t10_alua_tg_pt_gp *tg_pt_gp; | |
201 | struct t10_alua_tg_pt_gp_member *tg_pt_gp_mem; | |
e3d6f909 | 202 | unsigned char *prod = &dev->se_sub_dev->t10_wwn.model[0]; |
c66ac9db NB |
203 | u32 prod_len; |
204 | u32 unit_serial_len, off = 0; | |
c66ac9db NB |
205 | u16 len = 0, id_len; |
206 | ||
c66ac9db NB |
207 | off = 4; |
208 | ||
209 | /* | |
210 | * NAA IEEE Registered Extended Assigned designator format, see | |
211 | * spc4r17 section 7.7.3.6.5 | |
212 | * | |
213 | * We depend upon a target_core_mod/ConfigFS provided | |
214 | * /sys/kernel/config/target/core/$HBA/$DEV/wwn/vpd_unit_serial | |
215 | * value in order to return the NAA id. | |
216 | */ | |
217 | if (!(dev->se_sub_dev->su_dev_flags & SDF_EMULATED_VPD_UNIT_SERIAL)) | |
218 | goto check_t10_vend_desc; | |
219 | ||
220 | if (off + 20 > cmd->data_length) | |
221 | goto check_t10_vend_desc; | |
222 | ||
223 | /* CODE SET == Binary */ | |
224 | buf[off++] = 0x1; | |
225 | ||
163cd5fa | 226 | /* Set ASSOCIATION == addressed logical unit: 0)b */ |
c66ac9db NB |
227 | buf[off] = 0x00; |
228 | ||
229 | /* Identifier/Designator type == NAA identifier */ | |
163cd5fa | 230 | buf[off++] |= 0x3; |
c66ac9db NB |
231 | off++; |
232 | ||
233 | /* Identifier/Designator length */ | |
234 | buf[off++] = 0x10; | |
235 | ||
236 | /* | |
237 | * Start NAA IEEE Registered Extended Identifier/Designator | |
238 | */ | |
239 | buf[off++] = (0x6 << 4); | |
240 | ||
241 | /* | |
242 | * Use OpenFabrics IEEE Company ID: 00 14 05 | |
243 | */ | |
244 | buf[off++] = 0x01; | |
245 | buf[off++] = 0x40; | |
246 | buf[off] = (0x5 << 4); | |
247 | ||
248 | /* | |
249 | * Return ConfigFS Unit Serial Number information for | |
250 | * VENDOR_SPECIFIC_IDENTIFIER and | |
251 | * VENDOR_SPECIFIC_IDENTIFIER_EXTENTION | |
252 | */ | |
784eb99e | 253 | target_parse_naa_6h_vendor_specific(dev, &buf[off]); |
11650b85 | 254 | |
c66ac9db NB |
255 | len = 20; |
256 | off = (len + 4); | |
257 | ||
258 | check_t10_vend_desc: | |
259 | /* | |
260 | * T10 Vendor Identifier Page, see spc4r17 section 7.7.3.4 | |
261 | */ | |
262 | id_len = 8; /* For Vendor field */ | |
263 | prod_len = 4; /* For VPD Header */ | |
264 | prod_len += 8; /* For Vendor field */ | |
265 | prod_len += strlen(prod); | |
266 | prod_len++; /* For : */ | |
267 | ||
268 | if (dev->se_sub_dev->su_dev_flags & | |
269 | SDF_EMULATED_VPD_UNIT_SERIAL) { | |
270 | unit_serial_len = | |
e3d6f909 | 271 | strlen(&dev->se_sub_dev->t10_wwn.unit_serial[0]); |
c66ac9db NB |
272 | unit_serial_len++; /* For NULL Terminator */ |
273 | ||
274 | if ((len + (id_len + 4) + | |
275 | (prod_len + unit_serial_len)) > | |
276 | cmd->data_length) { | |
277 | len += (prod_len + unit_serial_len); | |
278 | goto check_port; | |
279 | } | |
280 | id_len += sprintf((unsigned char *)&buf[off+12], | |
281 | "%s:%s", prod, | |
e3d6f909 | 282 | &dev->se_sub_dev->t10_wwn.unit_serial[0]); |
c66ac9db NB |
283 | } |
284 | buf[off] = 0x2; /* ASCII */ | |
285 | buf[off+1] = 0x1; /* T10 Vendor ID */ | |
286 | buf[off+2] = 0x0; | |
287 | memcpy((unsigned char *)&buf[off+4], "LIO-ORG", 8); | |
288 | /* Extra Byte for NULL Terminator */ | |
289 | id_len++; | |
290 | /* Identifier Length */ | |
291 | buf[off+3] = id_len; | |
292 | /* Header size for Designation descriptor */ | |
293 | len += (id_len + 4); | |
294 | off += (id_len + 4); | |
295 | /* | |
296 | * struct se_port is only set for INQUIRY VPD=1 through $FABRIC_MOD | |
297 | */ | |
298 | check_port: | |
299 | port = lun->lun_sep; | |
300 | if (port) { | |
301 | struct t10_alua_lu_gp *lu_gp; | |
302 | u32 padding, scsi_name_len; | |
303 | u16 lu_gp_id = 0; | |
304 | u16 tg_pt_gp_id = 0; | |
305 | u16 tpgt; | |
306 | ||
307 | tpg = port->sep_tpg; | |
308 | /* | |
309 | * Relative target port identifer, see spc4r17 | |
310 | * section 7.7.3.7 | |
311 | * | |
312 | * Get the PROTOCOL IDENTIFIER as defined by spc4r17 | |
313 | * section 7.5.1 Table 362 | |
314 | */ | |
315 | if (((len + 4) + 8) > cmd->data_length) { | |
316 | len += 8; | |
317 | goto check_tpgi; | |
318 | } | |
319 | buf[off] = | |
e3d6f909 | 320 | (tpg->se_tpg_tfo->get_fabric_proto_ident(tpg) << 4); |
c66ac9db NB |
321 | buf[off++] |= 0x1; /* CODE SET == Binary */ |
322 | buf[off] = 0x80; /* Set PIV=1 */ | |
163cd5fa | 323 | /* Set ASSOCIATION == target port: 01b */ |
c66ac9db NB |
324 | buf[off] |= 0x10; |
325 | /* DESIGNATOR TYPE == Relative target port identifer */ | |
326 | buf[off++] |= 0x4; | |
327 | off++; /* Skip over Reserved */ | |
328 | buf[off++] = 4; /* DESIGNATOR LENGTH */ | |
329 | /* Skip over Obsolete field in RTPI payload | |
330 | * in Table 472 */ | |
331 | off += 2; | |
332 | buf[off++] = ((port->sep_rtpi >> 8) & 0xff); | |
333 | buf[off++] = (port->sep_rtpi & 0xff); | |
334 | len += 8; /* Header size + Designation descriptor */ | |
335 | /* | |
336 | * Target port group identifier, see spc4r17 | |
337 | * section 7.7.3.8 | |
338 | * | |
339 | * Get the PROTOCOL IDENTIFIER as defined by spc4r17 | |
340 | * section 7.5.1 Table 362 | |
341 | */ | |
342 | check_tpgi: | |
e3d6f909 | 343 | if (dev->se_sub_dev->t10_alua.alua_type != |
c66ac9db NB |
344 | SPC3_ALUA_EMULATED) |
345 | goto check_scsi_name; | |
346 | ||
347 | if (((len + 4) + 8) > cmd->data_length) { | |
348 | len += 8; | |
349 | goto check_lu_gp; | |
350 | } | |
351 | tg_pt_gp_mem = port->sep_alua_tg_pt_gp_mem; | |
352 | if (!tg_pt_gp_mem) | |
353 | goto check_lu_gp; | |
354 | ||
355 | spin_lock(&tg_pt_gp_mem->tg_pt_gp_mem_lock); | |
356 | tg_pt_gp = tg_pt_gp_mem->tg_pt_gp; | |
6708bb27 | 357 | if (!tg_pt_gp) { |
c66ac9db NB |
358 | spin_unlock(&tg_pt_gp_mem->tg_pt_gp_mem_lock); |
359 | goto check_lu_gp; | |
360 | } | |
361 | tg_pt_gp_id = tg_pt_gp->tg_pt_gp_id; | |
362 | spin_unlock(&tg_pt_gp_mem->tg_pt_gp_mem_lock); | |
363 | ||
364 | buf[off] = | |
e3d6f909 | 365 | (tpg->se_tpg_tfo->get_fabric_proto_ident(tpg) << 4); |
c66ac9db NB |
366 | buf[off++] |= 0x1; /* CODE SET == Binary */ |
367 | buf[off] = 0x80; /* Set PIV=1 */ | |
163cd5fa | 368 | /* Set ASSOCIATION == target port: 01b */ |
c66ac9db NB |
369 | buf[off] |= 0x10; |
370 | /* DESIGNATOR TYPE == Target port group identifier */ | |
371 | buf[off++] |= 0x5; | |
372 | off++; /* Skip over Reserved */ | |
373 | buf[off++] = 4; /* DESIGNATOR LENGTH */ | |
374 | off += 2; /* Skip over Reserved Field */ | |
375 | buf[off++] = ((tg_pt_gp_id >> 8) & 0xff); | |
376 | buf[off++] = (tg_pt_gp_id & 0xff); | |
377 | len += 8; /* Header size + Designation descriptor */ | |
378 | /* | |
379 | * Logical Unit Group identifier, see spc4r17 | |
380 | * section 7.7.3.8 | |
381 | */ | |
382 | check_lu_gp: | |
383 | if (((len + 4) + 8) > cmd->data_length) { | |
384 | len += 8; | |
385 | goto check_scsi_name; | |
386 | } | |
387 | lu_gp_mem = dev->dev_alua_lu_gp_mem; | |
6708bb27 | 388 | if (!lu_gp_mem) |
c66ac9db NB |
389 | goto check_scsi_name; |
390 | ||
391 | spin_lock(&lu_gp_mem->lu_gp_mem_lock); | |
392 | lu_gp = lu_gp_mem->lu_gp; | |
6708bb27 | 393 | if (!lu_gp) { |
c66ac9db NB |
394 | spin_unlock(&lu_gp_mem->lu_gp_mem_lock); |
395 | goto check_scsi_name; | |
396 | } | |
397 | lu_gp_id = lu_gp->lu_gp_id; | |
398 | spin_unlock(&lu_gp_mem->lu_gp_mem_lock); | |
399 | ||
400 | buf[off++] |= 0x1; /* CODE SET == Binary */ | |
401 | /* DESIGNATOR TYPE == Logical Unit Group identifier */ | |
402 | buf[off++] |= 0x6; | |
403 | off++; /* Skip over Reserved */ | |
404 | buf[off++] = 4; /* DESIGNATOR LENGTH */ | |
405 | off += 2; /* Skip over Reserved Field */ | |
406 | buf[off++] = ((lu_gp_id >> 8) & 0xff); | |
407 | buf[off++] = (lu_gp_id & 0xff); | |
408 | len += 8; /* Header size + Designation descriptor */ | |
409 | /* | |
410 | * SCSI name string designator, see spc4r17 | |
411 | * section 7.7.3.11 | |
412 | * | |
413 | * Get the PROTOCOL IDENTIFIER as defined by spc4r17 | |
414 | * section 7.5.1 Table 362 | |
415 | */ | |
416 | check_scsi_name: | |
e3d6f909 | 417 | scsi_name_len = strlen(tpg->se_tpg_tfo->tpg_get_wwn(tpg)); |
c66ac9db NB |
418 | /* UTF-8 ",t,0x<16-bit TPGT>" + NULL Terminator */ |
419 | scsi_name_len += 10; | |
420 | /* Check for 4-byte padding */ | |
421 | padding = ((-scsi_name_len) & 3); | |
422 | if (padding != 0) | |
423 | scsi_name_len += padding; | |
424 | /* Header size + Designation descriptor */ | |
425 | scsi_name_len += 4; | |
426 | ||
427 | if (((len + 4) + scsi_name_len) > cmd->data_length) { | |
428 | len += scsi_name_len; | |
429 | goto set_len; | |
430 | } | |
431 | buf[off] = | |
e3d6f909 | 432 | (tpg->se_tpg_tfo->get_fabric_proto_ident(tpg) << 4); |
c66ac9db NB |
433 | buf[off++] |= 0x3; /* CODE SET == UTF-8 */ |
434 | buf[off] = 0x80; /* Set PIV=1 */ | |
163cd5fa | 435 | /* Set ASSOCIATION == target port: 01b */ |
c66ac9db NB |
436 | buf[off] |= 0x10; |
437 | /* DESIGNATOR TYPE == SCSI name string */ | |
438 | buf[off++] |= 0x8; | |
439 | off += 2; /* Skip over Reserved and length */ | |
440 | /* | |
441 | * SCSI name string identifer containing, $FABRIC_MOD | |
442 | * dependent information. For LIO-Target and iSCSI | |
443 | * Target Port, this means "<iSCSI name>,t,0x<TPGT> in | |
444 | * UTF-8 encoding. | |
445 | */ | |
e3d6f909 | 446 | tpgt = tpg->se_tpg_tfo->tpg_get_tag(tpg); |
c66ac9db | 447 | scsi_name_len = sprintf(&buf[off], "%s,t,0x%04x", |
e3d6f909 | 448 | tpg->se_tpg_tfo->tpg_get_wwn(tpg), tpgt); |
c66ac9db NB |
449 | scsi_name_len += 1 /* Include NULL terminator */; |
450 | /* | |
451 | * The null-terminated, null-padded (see 4.4.2) SCSI | |
452 | * NAME STRING field contains a UTF-8 format string. | |
453 | * The number of bytes in the SCSI NAME STRING field | |
454 | * (i.e., the value in the DESIGNATOR LENGTH field) | |
455 | * shall be no larger than 256 and shall be a multiple | |
456 | * of four. | |
457 | */ | |
458 | if (padding) | |
459 | scsi_name_len += padding; | |
460 | ||
461 | buf[off-1] = scsi_name_len; | |
462 | off += scsi_name_len; | |
463 | /* Header size + Designation descriptor */ | |
464 | len += (scsi_name_len + 4); | |
465 | } | |
466 | set_len: | |
467 | buf[2] = ((len >> 8) & 0xff); | |
468 | buf[3] = (len & 0xff); /* Page Length for VPD 0x83 */ | |
469 | return 0; | |
470 | } | |
471 | ||
472 | /* Extended INQUIRY Data VPD Page */ | |
473 | static int | |
474 | target_emulate_evpd_86(struct se_cmd *cmd, unsigned char *buf) | |
475 | { | |
476 | if (cmd->data_length < 60) | |
477 | return 0; | |
478 | ||
c66ac9db NB |
479 | buf[2] = 0x3c; |
480 | /* Set HEADSUP, ORDSUP, SIMPSUP */ | |
481 | buf[5] = 0x07; | |
482 | ||
483 | /* If WriteCache emulation is enabled, set V_SUP */ | |
5951146d | 484 | if (cmd->se_dev->se_sub_dev->se_dev_attrib.emulate_write_cache > 0) |
c66ac9db NB |
485 | buf[6] = 0x01; |
486 | return 0; | |
487 | } | |
488 | ||
489 | /* Block Limits VPD page */ | |
490 | static int | |
491 | target_emulate_evpd_b0(struct se_cmd *cmd, unsigned char *buf) | |
492 | { | |
5951146d | 493 | struct se_device *dev = cmd->se_dev; |
c66ac9db NB |
494 | int have_tp = 0; |
495 | ||
496 | /* | |
497 | * Following sbc3r22 section 6.5.3 Block Limits VPD page, when | |
498 | * emulate_tpu=1 or emulate_tpws=1 we will be expect a | |
499 | * different page length for Thin Provisioning. | |
500 | */ | |
e3d6f909 | 501 | if (dev->se_sub_dev->se_dev_attrib.emulate_tpu || dev->se_sub_dev->se_dev_attrib.emulate_tpws) |
c66ac9db NB |
502 | have_tp = 1; |
503 | ||
504 | if (cmd->data_length < (0x10 + 4)) { | |
6708bb27 | 505 | pr_debug("Received data_length: %u" |
c66ac9db NB |
506 | " too small for EVPD 0xb0\n", |
507 | cmd->data_length); | |
e3d6f909 | 508 | return -EINVAL; |
c66ac9db NB |
509 | } |
510 | ||
511 | if (have_tp && cmd->data_length < (0x3c + 4)) { | |
6708bb27 | 512 | pr_debug("Received data_length: %u" |
c66ac9db NB |
513 | " too small for TPE=1 EVPD 0xb0\n", |
514 | cmd->data_length); | |
515 | have_tp = 0; | |
516 | } | |
517 | ||
518 | buf[0] = dev->transport->get_device_type(dev); | |
c66ac9db NB |
519 | buf[3] = have_tp ? 0x3c : 0x10; |
520 | ||
6708bb27 AG |
521 | /* Set WSNZ to 1 */ |
522 | buf[4] = 0x01; | |
523 | ||
c66ac9db NB |
524 | /* |
525 | * Set OPTIMAL TRANSFER LENGTH GRANULARITY | |
526 | */ | |
527 | put_unaligned_be16(1, &buf[6]); | |
528 | ||
529 | /* | |
530 | * Set MAXIMUM TRANSFER LENGTH | |
531 | */ | |
e3d6f909 | 532 | put_unaligned_be32(dev->se_sub_dev->se_dev_attrib.max_sectors, &buf[8]); |
c66ac9db NB |
533 | |
534 | /* | |
535 | * Set OPTIMAL TRANSFER LENGTH | |
536 | */ | |
e3d6f909 | 537 | put_unaligned_be32(dev->se_sub_dev->se_dev_attrib.optimal_sectors, &buf[12]); |
c66ac9db NB |
538 | |
539 | /* | |
540 | * Exit now if we don't support TP or the initiator sent a too | |
541 | * short buffer. | |
542 | */ | |
543 | if (!have_tp || cmd->data_length < (0x3c + 4)) | |
544 | return 0; | |
545 | ||
546 | /* | |
547 | * Set MAXIMUM UNMAP LBA COUNT | |
548 | */ | |
e3d6f909 | 549 | put_unaligned_be32(dev->se_sub_dev->se_dev_attrib.max_unmap_lba_count, &buf[20]); |
c66ac9db NB |
550 | |
551 | /* | |
552 | * Set MAXIMUM UNMAP BLOCK DESCRIPTOR COUNT | |
553 | */ | |
e3d6f909 | 554 | put_unaligned_be32(dev->se_sub_dev->se_dev_attrib.max_unmap_block_desc_count, |
c66ac9db NB |
555 | &buf[24]); |
556 | ||
557 | /* | |
558 | * Set OPTIMAL UNMAP GRANULARITY | |
559 | */ | |
e3d6f909 | 560 | put_unaligned_be32(dev->se_sub_dev->se_dev_attrib.unmap_granularity, &buf[28]); |
c66ac9db NB |
561 | |
562 | /* | |
563 | * UNMAP GRANULARITY ALIGNMENT | |
564 | */ | |
e3d6f909 | 565 | put_unaligned_be32(dev->se_sub_dev->se_dev_attrib.unmap_granularity_alignment, |
c66ac9db | 566 | &buf[32]); |
e3d6f909 | 567 | if (dev->se_sub_dev->se_dev_attrib.unmap_granularity_alignment != 0) |
c66ac9db NB |
568 | buf[32] |= 0x80; /* Set the UGAVALID bit */ |
569 | ||
570 | return 0; | |
571 | } | |
572 | ||
e22a7f07 RD |
573 | /* Block Device Characteristics VPD page */ |
574 | static int | |
575 | target_emulate_evpd_b1(struct se_cmd *cmd, unsigned char *buf) | |
576 | { | |
577 | struct se_device *dev = cmd->se_dev; | |
578 | ||
579 | buf[0] = dev->transport->get_device_type(dev); | |
580 | buf[3] = 0x3c; | |
581 | ||
582 | if (cmd->data_length >= 5 && | |
583 | dev->se_sub_dev->se_dev_attrib.is_nonrot) | |
584 | buf[5] = 1; | |
585 | ||
586 | return 0; | |
587 | } | |
588 | ||
c66ac9db NB |
589 | /* Thin Provisioning VPD */ |
590 | static int | |
591 | target_emulate_evpd_b2(struct se_cmd *cmd, unsigned char *buf) | |
592 | { | |
5951146d | 593 | struct se_device *dev = cmd->se_dev; |
c66ac9db NB |
594 | |
595 | /* | |
596 | * From sbc3r22 section 6.5.4 Thin Provisioning VPD page: | |
597 | * | |
598 | * The PAGE LENGTH field is defined in SPC-4. If the DP bit is set to | |
599 | * zero, then the page length shall be set to 0004h. If the DP bit | |
600 | * is set to one, then the page length shall be set to the value | |
601 | * defined in table 162. | |
602 | */ | |
603 | buf[0] = dev->transport->get_device_type(dev); | |
c66ac9db NB |
604 | |
605 | /* | |
606 | * Set Hardcoded length mentioned above for DP=0 | |
607 | */ | |
608 | put_unaligned_be16(0x0004, &buf[2]); | |
609 | ||
610 | /* | |
611 | * The THRESHOLD EXPONENT field indicates the threshold set size in | |
612 | * LBAs as a power of 2 (i.e., the threshold set size is equal to | |
613 | * 2(threshold exponent)). | |
614 | * | |
615 | * Note that this is currently set to 0x00 as mkp says it will be | |
616 | * changing again. We can enable this once it has settled in T10 | |
617 | * and is actually used by Linux/SCSI ML code. | |
618 | */ | |
619 | buf[4] = 0x00; | |
620 | ||
621 | /* | |
622 | * A TPU bit set to one indicates that the device server supports | |
623 | * the UNMAP command (see 5.25). A TPU bit set to zero indicates | |
624 | * that the device server does not support the UNMAP command. | |
625 | */ | |
e3d6f909 | 626 | if (dev->se_sub_dev->se_dev_attrib.emulate_tpu != 0) |
c66ac9db NB |
627 | buf[5] = 0x80; |
628 | ||
629 | /* | |
630 | * A TPWS bit set to one indicates that the device server supports | |
631 | * the use of the WRITE SAME (16) command (see 5.42) to unmap LBAs. | |
632 | * A TPWS bit set to zero indicates that the device server does not | |
633 | * support the use of the WRITE SAME (16) command to unmap LBAs. | |
634 | */ | |
e3d6f909 | 635 | if (dev->se_sub_dev->se_dev_attrib.emulate_tpws != 0) |
c66ac9db NB |
636 | buf[5] |= 0x40; |
637 | ||
638 | return 0; | |
639 | } | |
640 | ||
b2eb705e RD |
641 | static int |
642 | target_emulate_evpd_00(struct se_cmd *cmd, unsigned char *buf); | |
643 | ||
644 | static struct { | |
645 | uint8_t page; | |
646 | int (*emulate)(struct se_cmd *, unsigned char *); | |
647 | } evpd_handlers[] = { | |
648 | { .page = 0x00, .emulate = target_emulate_evpd_00 }, | |
649 | { .page = 0x80, .emulate = target_emulate_evpd_80 }, | |
650 | { .page = 0x83, .emulate = target_emulate_evpd_83 }, | |
651 | { .page = 0x86, .emulate = target_emulate_evpd_86 }, | |
652 | { .page = 0xb0, .emulate = target_emulate_evpd_b0 }, | |
e22a7f07 | 653 | { .page = 0xb1, .emulate = target_emulate_evpd_b1 }, |
b2eb705e RD |
654 | { .page = 0xb2, .emulate = target_emulate_evpd_b2 }, |
655 | }; | |
656 | ||
657 | /* supported vital product data pages */ | |
658 | static int | |
659 | target_emulate_evpd_00(struct se_cmd *cmd, unsigned char *buf) | |
660 | { | |
661 | int p; | |
662 | ||
663 | if (cmd->data_length < 8) | |
664 | return 0; | |
665 | /* | |
666 | * Only report the INQUIRY EVPD=1 pages after a valid NAA | |
667 | * Registered Extended LUN WWN has been set via ConfigFS | |
668 | * during device creation/restart. | |
669 | */ | |
670 | if (cmd->se_dev->se_sub_dev->su_dev_flags & | |
671 | SDF_EMULATED_VPD_UNIT_SERIAL) { | |
672 | buf[3] = ARRAY_SIZE(evpd_handlers); | |
673 | for (p = 0; p < min_t(int, ARRAY_SIZE(evpd_handlers), | |
674 | cmd->data_length - 4); ++p) | |
675 | buf[p + 4] = evpd_handlers[p].page; | |
676 | } | |
677 | ||
678 | return 0; | |
679 | } | |
680 | ||
c66ac9db NB |
681 | static int |
682 | target_emulate_inquiry(struct se_cmd *cmd) | |
683 | { | |
5951146d | 684 | struct se_device *dev = cmd->se_dev; |
05d1c7c0 | 685 | unsigned char *buf; |
a1d8b49a | 686 | unsigned char *cdb = cmd->t_task_cdb; |
05d1c7c0 | 687 | int p, ret; |
c66ac9db NB |
688 | |
689 | if (!(cdb[1] & 0x1)) | |
690 | return target_emulate_inquiry_std(cmd); | |
691 | ||
692 | /* | |
693 | * Make sure we at least have 4 bytes of INQUIRY response | |
694 | * payload for 0x00 going back for EVPD=1. Note that 0x80 | |
695 | * and 0x83 will check for enough payload data length and | |
696 | * jump to set_len: label when there is not enough inquiry EVPD | |
697 | * payload length left for the next outgoing EVPD metadata | |
698 | */ | |
699 | if (cmd->data_length < 4) { | |
6708bb27 | 700 | pr_err("SCSI Inquiry payload length: %u" |
c66ac9db | 701 | " too small for EVPD=1\n", cmd->data_length); |
e3d6f909 | 702 | return -EINVAL; |
c66ac9db | 703 | } |
05d1c7c0 AG |
704 | |
705 | buf = transport_kmap_first_data_page(cmd); | |
706 | ||
c66ac9db NB |
707 | buf[0] = dev->transport->get_device_type(dev); |
708 | ||
b2eb705e RD |
709 | for (p = 0; p < ARRAY_SIZE(evpd_handlers); ++p) |
710 | if (cdb[2] == evpd_handlers[p].page) { | |
711 | buf[1] = cdb[2]; | |
05d1c7c0 AG |
712 | ret = evpd_handlers[p].emulate(cmd, buf); |
713 | transport_kunmap_first_data_page(cmd); | |
714 | return ret; | |
b2eb705e | 715 | } |
c66ac9db | 716 | |
05d1c7c0 | 717 | transport_kunmap_first_data_page(cmd); |
6708bb27 | 718 | pr_err("Unknown VPD Code: 0x%02x\n", cdb[2]); |
b2eb705e | 719 | return -EINVAL; |
c66ac9db NB |
720 | } |
721 | ||
722 | static int | |
723 | target_emulate_readcapacity(struct se_cmd *cmd) | |
724 | { | |
5951146d | 725 | struct se_device *dev = cmd->se_dev; |
05d1c7c0 | 726 | unsigned char *buf; |
904f0bc4 NB |
727 | unsigned long long blocks_long = dev->transport->get_blocks(dev); |
728 | u32 blocks; | |
729 | ||
730 | if (blocks_long >= 0x00000000ffffffff) | |
731 | blocks = 0xffffffff; | |
732 | else | |
733 | blocks = (u32)blocks_long; | |
c66ac9db | 734 | |
05d1c7c0 AG |
735 | buf = transport_kmap_first_data_page(cmd); |
736 | ||
c66ac9db NB |
737 | buf[0] = (blocks >> 24) & 0xff; |
738 | buf[1] = (blocks >> 16) & 0xff; | |
739 | buf[2] = (blocks >> 8) & 0xff; | |
740 | buf[3] = blocks & 0xff; | |
e3d6f909 AG |
741 | buf[4] = (dev->se_sub_dev->se_dev_attrib.block_size >> 24) & 0xff; |
742 | buf[5] = (dev->se_sub_dev->se_dev_attrib.block_size >> 16) & 0xff; | |
743 | buf[6] = (dev->se_sub_dev->se_dev_attrib.block_size >> 8) & 0xff; | |
744 | buf[7] = dev->se_sub_dev->se_dev_attrib.block_size & 0xff; | |
c66ac9db NB |
745 | /* |
746 | * Set max 32-bit blocks to signal SERVICE ACTION READ_CAPACITY_16 | |
747 | */ | |
e3d6f909 | 748 | if (dev->se_sub_dev->se_dev_attrib.emulate_tpu || dev->se_sub_dev->se_dev_attrib.emulate_tpws) |
c66ac9db NB |
749 | put_unaligned_be32(0xFFFFFFFF, &buf[0]); |
750 | ||
05d1c7c0 AG |
751 | transport_kunmap_first_data_page(cmd); |
752 | ||
c66ac9db NB |
753 | return 0; |
754 | } | |
755 | ||
756 | static int | |
757 | target_emulate_readcapacity_16(struct se_cmd *cmd) | |
758 | { | |
5951146d | 759 | struct se_device *dev = cmd->se_dev; |
05d1c7c0 | 760 | unsigned char *buf; |
c66ac9db NB |
761 | unsigned long long blocks = dev->transport->get_blocks(dev); |
762 | ||
05d1c7c0 AG |
763 | buf = transport_kmap_first_data_page(cmd); |
764 | ||
c66ac9db NB |
765 | buf[0] = (blocks >> 56) & 0xff; |
766 | buf[1] = (blocks >> 48) & 0xff; | |
767 | buf[2] = (blocks >> 40) & 0xff; | |
768 | buf[3] = (blocks >> 32) & 0xff; | |
769 | buf[4] = (blocks >> 24) & 0xff; | |
770 | buf[5] = (blocks >> 16) & 0xff; | |
771 | buf[6] = (blocks >> 8) & 0xff; | |
772 | buf[7] = blocks & 0xff; | |
e3d6f909 AG |
773 | buf[8] = (dev->se_sub_dev->se_dev_attrib.block_size >> 24) & 0xff; |
774 | buf[9] = (dev->se_sub_dev->se_dev_attrib.block_size >> 16) & 0xff; | |
775 | buf[10] = (dev->se_sub_dev->se_dev_attrib.block_size >> 8) & 0xff; | |
776 | buf[11] = dev->se_sub_dev->se_dev_attrib.block_size & 0xff; | |
c66ac9db NB |
777 | /* |
778 | * Set Thin Provisioning Enable bit following sbc3r22 in section | |
779 | * READ CAPACITY (16) byte 14 if emulate_tpu or emulate_tpws is enabled. | |
780 | */ | |
e3d6f909 | 781 | if (dev->se_sub_dev->se_dev_attrib.emulate_tpu || dev->se_sub_dev->se_dev_attrib.emulate_tpws) |
c66ac9db NB |
782 | buf[14] = 0x80; |
783 | ||
05d1c7c0 AG |
784 | transport_kunmap_first_data_page(cmd); |
785 | ||
c66ac9db NB |
786 | return 0; |
787 | } | |
788 | ||
789 | static int | |
790 | target_modesense_rwrecovery(unsigned char *p) | |
791 | { | |
792 | p[0] = 0x01; | |
793 | p[1] = 0x0a; | |
794 | ||
795 | return 12; | |
796 | } | |
797 | ||
798 | static int | |
799 | target_modesense_control(struct se_device *dev, unsigned char *p) | |
800 | { | |
801 | p[0] = 0x0a; | |
802 | p[1] = 0x0a; | |
803 | p[2] = 2; | |
5de619a3 NB |
804 | /* |
805 | * From spc4r23, 7.4.7 Control mode page | |
806 | * | |
807 | * The QUEUE ALGORITHM MODIFIER field (see table 368) specifies | |
808 | * restrictions on the algorithm used for reordering commands | |
809 | * having the SIMPLE task attribute (see SAM-4). | |
810 | * | |
811 | * Table 368 -- QUEUE ALGORITHM MODIFIER field | |
812 | * Code Description | |
813 | * 0h Restricted reordering | |
814 | * 1h Unrestricted reordering allowed | |
815 | * 2h to 7h Reserved | |
816 | * 8h to Fh Vendor specific | |
817 | * | |
818 | * A value of zero in the QUEUE ALGORITHM MODIFIER field specifies that | |
819 | * the device server shall order the processing sequence of commands | |
820 | * having the SIMPLE task attribute such that data integrity is maintained | |
821 | * for that I_T nexus (i.e., if the transmission of new SCSI transport protocol | |
822 | * requests is halted at any time, the final value of all data observable | |
823 | * on the medium shall be the same as if all the commands had been processed | |
824 | * with the ORDERED task attribute). | |
825 | * | |
826 | * A value of one in the QUEUE ALGORITHM MODIFIER field specifies that the | |
827 | * device server may reorder the processing sequence of commands having the | |
828 | * SIMPLE task attribute in any manner. Any data integrity exposures related to | |
829 | * command sequence order shall be explicitly handled by the application client | |
830 | * through the selection of appropriate ommands and task attributes. | |
831 | */ | |
832 | p[3] = (dev->se_sub_dev->se_dev_attrib.emulate_rest_reord == 1) ? 0x00 : 0x10; | |
c66ac9db NB |
833 | /* |
834 | * From spc4r17, section 7.4.6 Control mode Page | |
835 | * | |
836 | * Unit Attention interlocks control (UN_INTLCK_CTRL) to code 00b | |
837 | * | |
838 | * 00b: The logical unit shall clear any unit attention condition | |
839 | * reported in the same I_T_L_Q nexus transaction as a CHECK CONDITION | |
840 | * status and shall not establish a unit attention condition when a com- | |
841 | * mand is completed with BUSY, TASK SET FULL, or RESERVATION CONFLICT | |
842 | * status. | |
843 | * | |
844 | * 10b: The logical unit shall not clear any unit attention condition | |
845 | * reported in the same I_T_L_Q nexus transaction as a CHECK CONDITION | |
846 | * status and shall not establish a unit attention condition when | |
847 | * a command is completed with BUSY, TASK SET FULL, or RESERVATION | |
848 | * CONFLICT status. | |
849 | * | |
850 | * 11b a The logical unit shall not clear any unit attention condition | |
851 | * reported in the same I_T_L_Q nexus transaction as a CHECK CONDITION | |
852 | * status and shall establish a unit attention condition for the | |
853 | * initiator port associated with the I_T nexus on which the BUSY, | |
854 | * TASK SET FULL, or RESERVATION CONFLICT status is being returned. | |
855 | * Depending on the status, the additional sense code shall be set to | |
856 | * PREVIOUS BUSY STATUS, PREVIOUS TASK SET FULL STATUS, or PREVIOUS | |
857 | * RESERVATION CONFLICT STATUS. Until it is cleared by a REQUEST SENSE | |
858 | * command, a unit attention condition shall be established only once | |
859 | * for a BUSY, TASK SET FULL, or RESERVATION CONFLICT status regardless | |
860 | * to the number of commands completed with one of those status codes. | |
861 | */ | |
e3d6f909 AG |
862 | p[4] = (dev->se_sub_dev->se_dev_attrib.emulate_ua_intlck_ctrl == 2) ? 0x30 : |
863 | (dev->se_sub_dev->se_dev_attrib.emulate_ua_intlck_ctrl == 1) ? 0x20 : 0x00; | |
c66ac9db NB |
864 | /* |
865 | * From spc4r17, section 7.4.6 Control mode Page | |
866 | * | |
867 | * Task Aborted Status (TAS) bit set to zero. | |
868 | * | |
869 | * A task aborted status (TAS) bit set to zero specifies that aborted | |
870 | * tasks shall be terminated by the device server without any response | |
871 | * to the application client. A TAS bit set to one specifies that tasks | |
872 | * aborted by the actions of an I_T nexus other than the I_T nexus on | |
873 | * which the command was received shall be completed with TASK ABORTED | |
874 | * status (see SAM-4). | |
875 | */ | |
e3d6f909 | 876 | p[5] = (dev->se_sub_dev->se_dev_attrib.emulate_tas) ? 0x40 : 0x00; |
c66ac9db NB |
877 | p[8] = 0xff; |
878 | p[9] = 0xff; | |
879 | p[11] = 30; | |
880 | ||
881 | return 12; | |
882 | } | |
883 | ||
884 | static int | |
885 | target_modesense_caching(struct se_device *dev, unsigned char *p) | |
886 | { | |
887 | p[0] = 0x08; | |
888 | p[1] = 0x12; | |
e3d6f909 | 889 | if (dev->se_sub_dev->se_dev_attrib.emulate_write_cache > 0) |
c66ac9db NB |
890 | p[2] = 0x04; /* Write Cache Enable */ |
891 | p[12] = 0x20; /* Disabled Read Ahead */ | |
892 | ||
893 | return 20; | |
894 | } | |
895 | ||
896 | static void | |
897 | target_modesense_write_protect(unsigned char *buf, int type) | |
898 | { | |
899 | /* | |
900 | * I believe that the WP bit (bit 7) in the mode header is the same for | |
901 | * all device types.. | |
902 | */ | |
903 | switch (type) { | |
904 | case TYPE_DISK: | |
905 | case TYPE_TAPE: | |
906 | default: | |
907 | buf[0] |= 0x80; /* WP bit */ | |
908 | break; | |
909 | } | |
910 | } | |
911 | ||
912 | static void | |
913 | target_modesense_dpofua(unsigned char *buf, int type) | |
914 | { | |
915 | switch (type) { | |
916 | case TYPE_DISK: | |
917 | buf[0] |= 0x10; /* DPOFUA bit */ | |
918 | break; | |
919 | default: | |
920 | break; | |
921 | } | |
922 | } | |
923 | ||
924 | static int | |
925 | target_emulate_modesense(struct se_cmd *cmd, int ten) | |
926 | { | |
5951146d | 927 | struct se_device *dev = cmd->se_dev; |
a1d8b49a | 928 | char *cdb = cmd->t_task_cdb; |
05d1c7c0 | 929 | unsigned char *rbuf; |
c66ac9db NB |
930 | int type = dev->transport->get_device_type(dev); |
931 | int offset = (ten) ? 8 : 4; | |
932 | int length = 0; | |
933 | unsigned char buf[SE_MODE_PAGE_BUF]; | |
934 | ||
935 | memset(buf, 0, SE_MODE_PAGE_BUF); | |
936 | ||
937 | switch (cdb[2] & 0x3f) { | |
938 | case 0x01: | |
939 | length = target_modesense_rwrecovery(&buf[offset]); | |
940 | break; | |
941 | case 0x08: | |
942 | length = target_modesense_caching(dev, &buf[offset]); | |
943 | break; | |
944 | case 0x0a: | |
945 | length = target_modesense_control(dev, &buf[offset]); | |
946 | break; | |
947 | case 0x3f: | |
948 | length = target_modesense_rwrecovery(&buf[offset]); | |
949 | length += target_modesense_caching(dev, &buf[offset+length]); | |
950 | length += target_modesense_control(dev, &buf[offset+length]); | |
951 | break; | |
952 | default: | |
f15ea578 RD |
953 | pr_err("MODE SENSE: unimplemented page/subpage: 0x%02x/0x%02x\n", |
954 | cdb[2] & 0x3f, cdb[3]); | |
c66ac9db NB |
955 | return PYX_TRANSPORT_UNKNOWN_MODE_PAGE; |
956 | } | |
957 | offset += length; | |
958 | ||
959 | if (ten) { | |
960 | offset -= 2; | |
961 | buf[0] = (offset >> 8) & 0xff; | |
962 | buf[1] = offset & 0xff; | |
963 | ||
e3d6f909 | 964 | if ((cmd->se_lun->lun_access & TRANSPORT_LUNFLAGS_READ_ONLY) || |
c66ac9db NB |
965 | (cmd->se_deve && |
966 | (cmd->se_deve->lun_flags & TRANSPORT_LUNFLAGS_READ_ONLY))) | |
967 | target_modesense_write_protect(&buf[3], type); | |
968 | ||
e3d6f909 AG |
969 | if ((dev->se_sub_dev->se_dev_attrib.emulate_write_cache > 0) && |
970 | (dev->se_sub_dev->se_dev_attrib.emulate_fua_write > 0)) | |
c66ac9db NB |
971 | target_modesense_dpofua(&buf[3], type); |
972 | ||
973 | if ((offset + 2) > cmd->data_length) | |
974 | offset = cmd->data_length; | |
975 | ||
976 | } else { | |
977 | offset -= 1; | |
978 | buf[0] = offset & 0xff; | |
979 | ||
e3d6f909 | 980 | if ((cmd->se_lun->lun_access & TRANSPORT_LUNFLAGS_READ_ONLY) || |
c66ac9db NB |
981 | (cmd->se_deve && |
982 | (cmd->se_deve->lun_flags & TRANSPORT_LUNFLAGS_READ_ONLY))) | |
983 | target_modesense_write_protect(&buf[2], type); | |
984 | ||
e3d6f909 AG |
985 | if ((dev->se_sub_dev->se_dev_attrib.emulate_write_cache > 0) && |
986 | (dev->se_sub_dev->se_dev_attrib.emulate_fua_write > 0)) | |
c66ac9db NB |
987 | target_modesense_dpofua(&buf[2], type); |
988 | ||
989 | if ((offset + 1) > cmd->data_length) | |
990 | offset = cmd->data_length; | |
991 | } | |
05d1c7c0 AG |
992 | |
993 | rbuf = transport_kmap_first_data_page(cmd); | |
c66ac9db | 994 | memcpy(rbuf, buf, offset); |
05d1c7c0 | 995 | transport_kunmap_first_data_page(cmd); |
c66ac9db NB |
996 | |
997 | return 0; | |
998 | } | |
999 | ||
1000 | static int | |
1001 | target_emulate_request_sense(struct se_cmd *cmd) | |
1002 | { | |
a1d8b49a | 1003 | unsigned char *cdb = cmd->t_task_cdb; |
05d1c7c0 | 1004 | unsigned char *buf; |
c66ac9db | 1005 | u8 ua_asc = 0, ua_ascq = 0; |
05d1c7c0 | 1006 | int err = 0; |
c66ac9db NB |
1007 | |
1008 | if (cdb[1] & 0x01) { | |
6708bb27 | 1009 | pr_err("REQUEST_SENSE description emulation not" |
c66ac9db NB |
1010 | " supported\n"); |
1011 | return PYX_TRANSPORT_INVALID_CDB_FIELD; | |
1012 | } | |
05d1c7c0 AG |
1013 | |
1014 | buf = transport_kmap_first_data_page(cmd); | |
1015 | ||
6708bb27 | 1016 | if (!core_scsi3_ua_clear_for_request_sense(cmd, &ua_asc, &ua_ascq)) { |
c66ac9db NB |
1017 | /* |
1018 | * CURRENT ERROR, UNIT ATTENTION | |
1019 | */ | |
1020 | buf[0] = 0x70; | |
1021 | buf[SPC_SENSE_KEY_OFFSET] = UNIT_ATTENTION; | |
1022 | /* | |
1023 | * Make sure request data length is enough for additional | |
1024 | * sense data. | |
1025 | */ | |
1026 | if (cmd->data_length <= 18) { | |
1027 | buf[7] = 0x00; | |
05d1c7c0 AG |
1028 | err = -EINVAL; |
1029 | goto end; | |
c66ac9db NB |
1030 | } |
1031 | /* | |
1032 | * The Additional Sense Code (ASC) from the UNIT ATTENTION | |
1033 | */ | |
1034 | buf[SPC_ASC_KEY_OFFSET] = ua_asc; | |
1035 | buf[SPC_ASCQ_KEY_OFFSET] = ua_ascq; | |
1036 | buf[7] = 0x0A; | |
1037 | } else { | |
1038 | /* | |
1039 | * CURRENT ERROR, NO SENSE | |
1040 | */ | |
1041 | buf[0] = 0x70; | |
1042 | buf[SPC_SENSE_KEY_OFFSET] = NO_SENSE; | |
1043 | /* | |
1044 | * Make sure request data length is enough for additional | |
1045 | * sense data. | |
1046 | */ | |
1047 | if (cmd->data_length <= 18) { | |
1048 | buf[7] = 0x00; | |
05d1c7c0 AG |
1049 | err = -EINVAL; |
1050 | goto end; | |
c66ac9db NB |
1051 | } |
1052 | /* | |
1053 | * NO ADDITIONAL SENSE INFORMATION | |
1054 | */ | |
1055 | buf[SPC_ASC_KEY_OFFSET] = 0x00; | |
1056 | buf[7] = 0x0A; | |
1057 | } | |
1058 | ||
05d1c7c0 AG |
1059 | end: |
1060 | transport_kunmap_first_data_page(cmd); | |
1061 | ||
c66ac9db NB |
1062 | return 0; |
1063 | } | |
1064 | ||
1065 | /* | |
1066 | * Used for TCM/IBLOCK and TCM/FILEIO for block/blk-lib.c level discard support. | |
1067 | * Note this is not used for TCM/pSCSI passthrough | |
1068 | */ | |
1069 | static int | |
1070 | target_emulate_unmap(struct se_task *task) | |
1071 | { | |
e3d6f909 | 1072 | struct se_cmd *cmd = task->task_se_cmd; |
5951146d | 1073 | struct se_device *dev = cmd->se_dev; |
05d1c7c0 | 1074 | unsigned char *buf, *ptr = NULL; |
a1d8b49a | 1075 | unsigned char *cdb = &cmd->t_task_cdb[0]; |
c66ac9db NB |
1076 | sector_t lba; |
1077 | unsigned int size = cmd->data_length, range; | |
05d1c7c0 | 1078 | int ret = 0, offset; |
c66ac9db NB |
1079 | unsigned short dl, bd_dl; |
1080 | ||
1081 | /* First UNMAP block descriptor starts at 8 byte offset */ | |
1082 | offset = 8; | |
1083 | size -= 8; | |
1084 | dl = get_unaligned_be16(&cdb[0]); | |
1085 | bd_dl = get_unaligned_be16(&cdb[2]); | |
05d1c7c0 AG |
1086 | |
1087 | buf = transport_kmap_first_data_page(cmd); | |
1088 | ||
c66ac9db | 1089 | ptr = &buf[offset]; |
6708bb27 | 1090 | pr_debug("UNMAP: Sub: %s Using dl: %hu bd_dl: %hu size: %hu" |
c66ac9db NB |
1091 | " ptr: %p\n", dev->transport->name, dl, bd_dl, size, ptr); |
1092 | ||
1093 | while (size) { | |
1094 | lba = get_unaligned_be64(&ptr[0]); | |
1095 | range = get_unaligned_be32(&ptr[8]); | |
6708bb27 | 1096 | pr_debug("UNMAP: Using lba: %llu and range: %u\n", |
c66ac9db NB |
1097 | (unsigned long long)lba, range); |
1098 | ||
1099 | ret = dev->transport->do_discard(dev, lba, range); | |
1100 | if (ret < 0) { | |
6708bb27 | 1101 | pr_err("blkdev_issue_discard() failed: %d\n", |
c66ac9db | 1102 | ret); |
05d1c7c0 | 1103 | goto err; |
c66ac9db NB |
1104 | } |
1105 | ||
1106 | ptr += 16; | |
1107 | size -= 16; | |
1108 | } | |
1109 | ||
05d1c7c0 AG |
1110 | err: |
1111 | transport_kunmap_first_data_page(cmd); | |
1112 | ||
1113 | return ret; | |
c66ac9db NB |
1114 | } |
1115 | ||
1116 | /* | |
1117 | * Used for TCM/IBLOCK and TCM/FILEIO for block/blk-lib.c level discard support. | |
1118 | * Note this is not used for TCM/pSCSI passthrough | |
1119 | */ | |
1120 | static int | |
706d5860 | 1121 | target_emulate_write_same(struct se_task *task, u32 num_blocks) |
c66ac9db | 1122 | { |
e3d6f909 | 1123 | struct se_cmd *cmd = task->task_se_cmd; |
5951146d | 1124 | struct se_device *dev = cmd->se_dev; |
a1d8b49a AG |
1125 | sector_t range; |
1126 | sector_t lba = cmd->t_task_lba; | |
c66ac9db | 1127 | int ret; |
dd3a5ad8 | 1128 | /* |
706d5860 NB |
1129 | * Use the explicit range when non zero is supplied, otherwise calculate |
1130 | * the remaining range based on ->get_blocks() - starting LBA. | |
dd3a5ad8 | 1131 | */ |
dd3a5ad8 NB |
1132 | if (num_blocks != 0) |
1133 | range = num_blocks; | |
1134 | else | |
1135 | range = (dev->transport->get_blocks(dev) - lba); | |
c66ac9db | 1136 | |
6708bb27 | 1137 | pr_debug("WRITE_SAME UNMAP: LBA: %llu Range: %llu\n", |
dd3a5ad8 | 1138 | (unsigned long long)lba, (unsigned long long)range); |
c66ac9db NB |
1139 | |
1140 | ret = dev->transport->do_discard(dev, lba, range); | |
1141 | if (ret < 0) { | |
6708bb27 | 1142 | pr_debug("blkdev_issue_discard() failed for WRITE_SAME\n"); |
e3d6f909 | 1143 | return ret; |
c66ac9db NB |
1144 | } |
1145 | ||
c66ac9db NB |
1146 | return 0; |
1147 | } | |
1148 | ||
1149 | int | |
1150 | transport_emulate_control_cdb(struct se_task *task) | |
1151 | { | |
e3d6f909 | 1152 | struct se_cmd *cmd = task->task_se_cmd; |
5951146d | 1153 | struct se_device *dev = cmd->se_dev; |
c66ac9db NB |
1154 | unsigned short service_action; |
1155 | int ret = 0; | |
1156 | ||
a1d8b49a | 1157 | switch (cmd->t_task_cdb[0]) { |
c66ac9db NB |
1158 | case INQUIRY: |
1159 | ret = target_emulate_inquiry(cmd); | |
1160 | break; | |
1161 | case READ_CAPACITY: | |
1162 | ret = target_emulate_readcapacity(cmd); | |
1163 | break; | |
1164 | case MODE_SENSE: | |
1165 | ret = target_emulate_modesense(cmd, 0); | |
1166 | break; | |
1167 | case MODE_SENSE_10: | |
1168 | ret = target_emulate_modesense(cmd, 1); | |
1169 | break; | |
1170 | case SERVICE_ACTION_IN: | |
a1d8b49a | 1171 | switch (cmd->t_task_cdb[1] & 0x1f) { |
c66ac9db NB |
1172 | case SAI_READ_CAPACITY_16: |
1173 | ret = target_emulate_readcapacity_16(cmd); | |
1174 | break; | |
1175 | default: | |
6708bb27 | 1176 | pr_err("Unsupported SA: 0x%02x\n", |
a1d8b49a | 1177 | cmd->t_task_cdb[1] & 0x1f); |
c66ac9db NB |
1178 | return PYX_TRANSPORT_UNKNOWN_SAM_OPCODE; |
1179 | } | |
1180 | break; | |
1181 | case REQUEST_SENSE: | |
1182 | ret = target_emulate_request_sense(cmd); | |
1183 | break; | |
1184 | case UNMAP: | |
1185 | if (!dev->transport->do_discard) { | |
6708bb27 | 1186 | pr_err("UNMAP emulation not supported for: %s\n", |
c66ac9db NB |
1187 | dev->transport->name); |
1188 | return PYX_TRANSPORT_UNKNOWN_SAM_OPCODE; | |
1189 | } | |
1190 | ret = target_emulate_unmap(task); | |
1191 | break; | |
706d5860 NB |
1192 | case WRITE_SAME: |
1193 | if (!dev->transport->do_discard) { | |
1194 | pr_err("WRITE_SAME emulation not supported" | |
1195 | " for: %s\n", dev->transport->name); | |
1196 | return PYX_TRANSPORT_UNKNOWN_SAM_OPCODE; | |
1197 | } | |
1198 | ret = target_emulate_write_same(task, | |
1199 | get_unaligned_be16(&cmd->t_task_cdb[7])); | |
1200 | break; | |
c66ac9db NB |
1201 | case WRITE_SAME_16: |
1202 | if (!dev->transport->do_discard) { | |
6708bb27 | 1203 | pr_err("WRITE_SAME_16 emulation not supported" |
c66ac9db NB |
1204 | " for: %s\n", dev->transport->name); |
1205 | return PYX_TRANSPORT_UNKNOWN_SAM_OPCODE; | |
1206 | } | |
706d5860 NB |
1207 | ret = target_emulate_write_same(task, |
1208 | get_unaligned_be32(&cmd->t_task_cdb[10])); | |
c66ac9db NB |
1209 | break; |
1210 | case VARIABLE_LENGTH_CMD: | |
1211 | service_action = | |
a1d8b49a | 1212 | get_unaligned_be16(&cmd->t_task_cdb[8]); |
c66ac9db NB |
1213 | switch (service_action) { |
1214 | case WRITE_SAME_32: | |
1215 | if (!dev->transport->do_discard) { | |
6708bb27 | 1216 | pr_err("WRITE_SAME_32 SA emulation not" |
c66ac9db NB |
1217 | " supported for: %s\n", |
1218 | dev->transport->name); | |
1219 | return PYX_TRANSPORT_UNKNOWN_SAM_OPCODE; | |
1220 | } | |
706d5860 NB |
1221 | ret = target_emulate_write_same(task, |
1222 | get_unaligned_be32(&cmd->t_task_cdb[28])); | |
c66ac9db NB |
1223 | break; |
1224 | default: | |
6708bb27 | 1225 | pr_err("Unsupported VARIABLE_LENGTH_CMD SA:" |
c66ac9db NB |
1226 | " 0x%02x\n", service_action); |
1227 | break; | |
1228 | } | |
1229 | break; | |
1230 | case SYNCHRONIZE_CACHE: | |
1231 | case 0x91: /* SYNCHRONIZE_CACHE_16: */ | |
1232 | if (!dev->transport->do_sync_cache) { | |
6708bb27 | 1233 | pr_err("SYNCHRONIZE_CACHE emulation not supported" |
c66ac9db NB |
1234 | " for: %s\n", dev->transport->name); |
1235 | return PYX_TRANSPORT_UNKNOWN_SAM_OPCODE; | |
1236 | } | |
1237 | dev->transport->do_sync_cache(task); | |
1238 | break; | |
1239 | case ALLOW_MEDIUM_REMOVAL: | |
1240 | case ERASE: | |
1241 | case REZERO_UNIT: | |
1242 | case SEEK_10: | |
1243 | case SPACE: | |
1244 | case START_STOP: | |
1245 | case TEST_UNIT_READY: | |
1246 | case VERIFY: | |
1247 | case WRITE_FILEMARKS: | |
1248 | break; | |
1249 | default: | |
6708bb27 | 1250 | pr_err("Unsupported SCSI Opcode: 0x%02x for %s\n", |
a1d8b49a | 1251 | cmd->t_task_cdb[0], dev->transport->name); |
c66ac9db NB |
1252 | return PYX_TRANSPORT_UNKNOWN_SAM_OPCODE; |
1253 | } | |
1254 | ||
1255 | if (ret < 0) | |
1256 | return ret; | |
72f4ba1e NB |
1257 | /* |
1258 | * Handle the successful completion here unless a caller | |
1259 | * has explictly requested an asychronous completion. | |
1260 | */ | |
1261 | if (!(cmd->se_cmd_flags & SCF_EMULATE_CDB_ASYNC)) { | |
1262 | task->task_scsi_status = GOOD; | |
1263 | transport_complete_task(task, 1); | |
1264 | } | |
c66ac9db NB |
1265 | |
1266 | return PYX_TRANSPORT_SENT_TO_TRANSPORT; | |
1267 | } | |
485fd0d1 CH |
1268 | |
1269 | /* | |
1270 | * Write a CDB into @cdb that is based on the one the intiator sent us, | |
1271 | * but updated to only cover the sectors that the current task handles. | |
1272 | */ | |
1273 | void target_get_task_cdb(struct se_task *task, unsigned char *cdb) | |
1274 | { | |
1275 | struct se_cmd *cmd = task->task_se_cmd; | |
1276 | ||
1277 | memcpy(cdb, cmd->t_task_cdb, scsi_command_size(cmd->t_task_cdb)); | |
1278 | if (cmd->se_cmd_flags & SCF_SCSI_DATA_SG_IO_CDB) { | |
1279 | cmd->transport_split_cdb(task->task_lba, task->task_sectors, | |
1280 | cdb); | |
1281 | } | |
1282 | } | |
1283 | EXPORT_SYMBOL(target_get_task_cdb); |