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> |
b91bf5bf | 27 | #include <linux/module.h> |
c66ac9db NB |
28 | #include <asm/unaligned.h> |
29 | #include <scsi/scsi.h> | |
30 | ||
31 | #include <target/target_core_base.h> | |
32 | #include <target/target_core_transport.h> | |
33 | #include <target/target_core_fabric_ops.h> | |
34 | #include "target_core_ua.h" | |
35 | ||
36 | static void | |
37 | target_fill_alua_data(struct se_port *port, unsigned char *buf) | |
38 | { | |
39 | struct t10_alua_tg_pt_gp *tg_pt_gp; | |
40 | struct t10_alua_tg_pt_gp_member *tg_pt_gp_mem; | |
41 | ||
42 | /* | |
43 | * Set SCCS for MAINTENANCE_IN + REPORT_TARGET_PORT_GROUPS. | |
44 | */ | |
45 | buf[5] = 0x80; | |
46 | ||
47 | /* | |
48 | * Set TPGS field for explict and/or implict ALUA access type | |
49 | * and opteration. | |
50 | * | |
51 | * See spc4r17 section 6.4.2 Table 135 | |
52 | */ | |
53 | if (!port) | |
54 | return; | |
55 | tg_pt_gp_mem = port->sep_alua_tg_pt_gp_mem; | |
56 | if (!tg_pt_gp_mem) | |
57 | return; | |
58 | ||
59 | spin_lock(&tg_pt_gp_mem->tg_pt_gp_mem_lock); | |
60 | tg_pt_gp = tg_pt_gp_mem->tg_pt_gp; | |
61 | if (tg_pt_gp) | |
62 | buf[5] |= tg_pt_gp->tg_pt_gp_alua_access_type; | |
63 | spin_unlock(&tg_pt_gp_mem->tg_pt_gp_mem_lock); | |
64 | } | |
65 | ||
66 | static int | |
67 | target_emulate_inquiry_std(struct se_cmd *cmd) | |
68 | { | |
e3d6f909 | 69 | struct se_lun *lun = cmd->se_lun; |
5951146d | 70 | struct se_device *dev = cmd->se_dev; |
052605c6 | 71 | struct se_portal_group *tpg = lun->lun_sep->sep_tpg; |
05d1c7c0 | 72 | unsigned char *buf; |
c66ac9db NB |
73 | |
74 | /* | |
75 | * Make sure we at least have 6 bytes of INQUIRY response | |
76 | * payload going back for EVPD=0 | |
77 | */ | |
78 | if (cmd->data_length < 6) { | |
6708bb27 | 79 | pr_err("SCSI Inquiry payload length: %u" |
c66ac9db | 80 | " too small for EVPD=0\n", cmd->data_length); |
e3d6f909 | 81 | return -EINVAL; |
c66ac9db NB |
82 | } |
83 | ||
05d1c7c0 AG |
84 | buf = transport_kmap_first_data_page(cmd); |
85 | ||
052605c6 NB |
86 | if (dev == tpg->tpg_virt_lun0.lun_se_dev) { |
87 | buf[0] = 0x3f; /* Not connected */ | |
88 | } else { | |
89 | buf[0] = dev->transport->get_device_type(dev); | |
90 | if (buf[0] == TYPE_TAPE) | |
91 | buf[1] = 0x80; | |
92 | } | |
c66ac9db NB |
93 | buf[2] = dev->transport->get_device_rev(dev); |
94 | ||
95 | /* | |
96 | * Enable SCCS and TPGS fields for Emulated ALUA | |
97 | */ | |
e3d6f909 | 98 | if (dev->se_sub_dev->t10_alua.alua_type == SPC3_ALUA_EMULATED) |
c66ac9db NB |
99 | target_fill_alua_data(lun->lun_sep, buf); |
100 | ||
101 | if (cmd->data_length < 8) { | |
102 | buf[4] = 1; /* Set additional length to 1 */ | |
05d1c7c0 | 103 | goto out; |
c66ac9db NB |
104 | } |
105 | ||
106 | buf[7] = 0x32; /* Sync=1 and CmdQue=1 */ | |
107 | ||
108 | /* | |
109 | * Do not include vendor, product, reversion info in INQUIRY | |
110 | * response payload for cdbs with a small allocation length. | |
111 | */ | |
112 | if (cmd->data_length < 36) { | |
113 | buf[4] = 3; /* Set additional length to 3 */ | |
05d1c7c0 | 114 | goto out; |
c66ac9db NB |
115 | } |
116 | ||
117 | snprintf((unsigned char *)&buf[8], 8, "LIO-ORG"); | |
118 | snprintf((unsigned char *)&buf[16], 16, "%s", | |
e3d6f909 | 119 | &dev->se_sub_dev->t10_wwn.model[0]); |
c66ac9db | 120 | snprintf((unsigned char *)&buf[32], 4, "%s", |
e3d6f909 | 121 | &dev->se_sub_dev->t10_wwn.revision[0]); |
c66ac9db | 122 | buf[4] = 31; /* Set additional length to 31 */ |
05d1c7c0 AG |
123 | |
124 | out: | |
125 | transport_kunmap_first_data_page(cmd); | |
c66ac9db NB |
126 | return 0; |
127 | } | |
128 | ||
c66ac9db NB |
129 | /* unit serial number */ |
130 | static int | |
131 | target_emulate_evpd_80(struct se_cmd *cmd, unsigned char *buf) | |
132 | { | |
5951146d | 133 | struct se_device *dev = cmd->se_dev; |
c66ac9db NB |
134 | u16 len = 0; |
135 | ||
c66ac9db NB |
136 | if (dev->se_sub_dev->su_dev_flags & |
137 | SDF_EMULATED_VPD_UNIT_SERIAL) { | |
138 | u32 unit_serial_len; | |
139 | ||
140 | unit_serial_len = | |
e3d6f909 | 141 | strlen(&dev->se_sub_dev->t10_wwn.unit_serial[0]); |
c66ac9db NB |
142 | unit_serial_len++; /* For NULL Terminator */ |
143 | ||
144 | if (((len + 4) + unit_serial_len) > cmd->data_length) { | |
145 | len += unit_serial_len; | |
146 | buf[2] = ((len >> 8) & 0xff); | |
147 | buf[3] = (len & 0xff); | |
148 | return 0; | |
149 | } | |
150 | len += sprintf((unsigned char *)&buf[4], "%s", | |
e3d6f909 | 151 | &dev->se_sub_dev->t10_wwn.unit_serial[0]); |
c66ac9db NB |
152 | len++; /* Extra Byte for NULL Terminator */ |
153 | buf[3] = len; | |
154 | } | |
155 | return 0; | |
156 | } | |
157 | ||
784eb99e | 158 | static void |
b6b4e61f | 159 | target_parse_naa_6h_vendor_specific(struct se_device *dev, unsigned char *buf) |
784eb99e NB |
160 | { |
161 | unsigned char *p = &dev->se_sub_dev->t10_wwn.unit_serial[0]; | |
b6b4e61f AS |
162 | int cnt; |
163 | bool next = true; | |
164 | ||
784eb99e NB |
165 | /* |
166 | * Generate up to 36 bits of VENDOR SPECIFIC IDENTIFIER starting on | |
167 | * byte 3 bit 3-0 for NAA IEEE Registered Extended DESIGNATOR field | |
168 | * format, followed by 64 bits of VENDOR SPECIFIC IDENTIFIER EXTENSION | |
169 | * to complete the payload. These are based from VPD=0x80 PRODUCT SERIAL | |
170 | * NUMBER set via vpd_unit_serial in target_core_configfs.c to ensure | |
171 | * per device uniqeness. | |
172 | */ | |
b6b4e61f AS |
173 | for (cnt = 0; *p && cnt < 13; p++) { |
174 | int val = hex_to_bin(*p); | |
175 | ||
176 | if (val < 0) | |
784eb99e | 177 | continue; |
b6b4e61f AS |
178 | |
179 | if (next) { | |
180 | next = false; | |
181 | buf[cnt++] |= val; | |
784eb99e | 182 | } else { |
b6b4e61f AS |
183 | next = true; |
184 | buf[cnt] = val << 4; | |
784eb99e NB |
185 | } |
186 | } | |
187 | } | |
188 | ||
c66ac9db NB |
189 | /* |
190 | * Device identification VPD, for a complete list of | |
191 | * DESIGNATOR TYPEs see spc4r17 Table 459. | |
192 | */ | |
193 | static int | |
194 | target_emulate_evpd_83(struct se_cmd *cmd, unsigned char *buf) | |
195 | { | |
5951146d | 196 | struct se_device *dev = cmd->se_dev; |
e3d6f909 | 197 | struct se_lun *lun = cmd->se_lun; |
c66ac9db NB |
198 | struct se_port *port = NULL; |
199 | struct se_portal_group *tpg = NULL; | |
200 | struct t10_alua_lu_gp_member *lu_gp_mem; | |
201 | struct t10_alua_tg_pt_gp *tg_pt_gp; | |
202 | struct t10_alua_tg_pt_gp_member *tg_pt_gp_mem; | |
e3d6f909 | 203 | unsigned char *prod = &dev->se_sub_dev->t10_wwn.model[0]; |
c66ac9db NB |
204 | u32 prod_len; |
205 | u32 unit_serial_len, off = 0; | |
c66ac9db NB |
206 | u16 len = 0, id_len; |
207 | ||
c66ac9db NB |
208 | off = 4; |
209 | ||
210 | /* | |
211 | * NAA IEEE Registered Extended Assigned designator format, see | |
212 | * spc4r17 section 7.7.3.6.5 | |
213 | * | |
214 | * We depend upon a target_core_mod/ConfigFS provided | |
215 | * /sys/kernel/config/target/core/$HBA/$DEV/wwn/vpd_unit_serial | |
216 | * value in order to return the NAA id. | |
217 | */ | |
218 | if (!(dev->se_sub_dev->su_dev_flags & SDF_EMULATED_VPD_UNIT_SERIAL)) | |
219 | goto check_t10_vend_desc; | |
220 | ||
221 | if (off + 20 > cmd->data_length) | |
222 | goto check_t10_vend_desc; | |
223 | ||
224 | /* CODE SET == Binary */ | |
225 | buf[off++] = 0x1; | |
226 | ||
163cd5fa | 227 | /* Set ASSOCIATION == addressed logical unit: 0)b */ |
c66ac9db NB |
228 | buf[off] = 0x00; |
229 | ||
230 | /* Identifier/Designator type == NAA identifier */ | |
163cd5fa | 231 | buf[off++] |= 0x3; |
c66ac9db NB |
232 | off++; |
233 | ||
234 | /* Identifier/Designator length */ | |
235 | buf[off++] = 0x10; | |
236 | ||
237 | /* | |
238 | * Start NAA IEEE Registered Extended Identifier/Designator | |
239 | */ | |
240 | buf[off++] = (0x6 << 4); | |
241 | ||
242 | /* | |
243 | * Use OpenFabrics IEEE Company ID: 00 14 05 | |
244 | */ | |
245 | buf[off++] = 0x01; | |
246 | buf[off++] = 0x40; | |
247 | buf[off] = (0x5 << 4); | |
248 | ||
249 | /* | |
250 | * Return ConfigFS Unit Serial Number information for | |
251 | * VENDOR_SPECIFIC_IDENTIFIER and | |
252 | * VENDOR_SPECIFIC_IDENTIFIER_EXTENTION | |
253 | */ | |
784eb99e | 254 | target_parse_naa_6h_vendor_specific(dev, &buf[off]); |
11650b85 | 255 | |
c66ac9db NB |
256 | len = 20; |
257 | off = (len + 4); | |
258 | ||
259 | check_t10_vend_desc: | |
260 | /* | |
261 | * T10 Vendor Identifier Page, see spc4r17 section 7.7.3.4 | |
262 | */ | |
263 | id_len = 8; /* For Vendor field */ | |
264 | prod_len = 4; /* For VPD Header */ | |
265 | prod_len += 8; /* For Vendor field */ | |
266 | prod_len += strlen(prod); | |
267 | prod_len++; /* For : */ | |
268 | ||
269 | if (dev->se_sub_dev->su_dev_flags & | |
270 | SDF_EMULATED_VPD_UNIT_SERIAL) { | |
271 | unit_serial_len = | |
e3d6f909 | 272 | strlen(&dev->se_sub_dev->t10_wwn.unit_serial[0]); |
c66ac9db NB |
273 | unit_serial_len++; /* For NULL Terminator */ |
274 | ||
275 | if ((len + (id_len + 4) + | |
276 | (prod_len + unit_serial_len)) > | |
277 | cmd->data_length) { | |
278 | len += (prod_len + unit_serial_len); | |
279 | goto check_port; | |
280 | } | |
281 | id_len += sprintf((unsigned char *)&buf[off+12], | |
282 | "%s:%s", prod, | |
e3d6f909 | 283 | &dev->se_sub_dev->t10_wwn.unit_serial[0]); |
c66ac9db NB |
284 | } |
285 | buf[off] = 0x2; /* ASCII */ | |
286 | buf[off+1] = 0x1; /* T10 Vendor ID */ | |
287 | buf[off+2] = 0x0; | |
288 | memcpy((unsigned char *)&buf[off+4], "LIO-ORG", 8); | |
289 | /* Extra Byte for NULL Terminator */ | |
290 | id_len++; | |
291 | /* Identifier Length */ | |
292 | buf[off+3] = id_len; | |
293 | /* Header size for Designation descriptor */ | |
294 | len += (id_len + 4); | |
295 | off += (id_len + 4); | |
296 | /* | |
297 | * struct se_port is only set for INQUIRY VPD=1 through $FABRIC_MOD | |
298 | */ | |
299 | check_port: | |
300 | port = lun->lun_sep; | |
301 | if (port) { | |
302 | struct t10_alua_lu_gp *lu_gp; | |
303 | u32 padding, scsi_name_len; | |
304 | u16 lu_gp_id = 0; | |
305 | u16 tg_pt_gp_id = 0; | |
306 | u16 tpgt; | |
307 | ||
308 | tpg = port->sep_tpg; | |
309 | /* | |
310 | * Relative target port identifer, see spc4r17 | |
311 | * section 7.7.3.7 | |
312 | * | |
313 | * Get the PROTOCOL IDENTIFIER as defined by spc4r17 | |
314 | * section 7.5.1 Table 362 | |
315 | */ | |
316 | if (((len + 4) + 8) > cmd->data_length) { | |
317 | len += 8; | |
318 | goto check_tpgi; | |
319 | } | |
320 | buf[off] = | |
e3d6f909 | 321 | (tpg->se_tpg_tfo->get_fabric_proto_ident(tpg) << 4); |
c66ac9db NB |
322 | buf[off++] |= 0x1; /* CODE SET == Binary */ |
323 | buf[off] = 0x80; /* Set PIV=1 */ | |
163cd5fa | 324 | /* Set ASSOCIATION == target port: 01b */ |
c66ac9db NB |
325 | buf[off] |= 0x10; |
326 | /* DESIGNATOR TYPE == Relative target port identifer */ | |
327 | buf[off++] |= 0x4; | |
328 | off++; /* Skip over Reserved */ | |
329 | buf[off++] = 4; /* DESIGNATOR LENGTH */ | |
330 | /* Skip over Obsolete field in RTPI payload | |
331 | * in Table 472 */ | |
332 | off += 2; | |
333 | buf[off++] = ((port->sep_rtpi >> 8) & 0xff); | |
334 | buf[off++] = (port->sep_rtpi & 0xff); | |
335 | len += 8; /* Header size + Designation descriptor */ | |
336 | /* | |
337 | * Target port group identifier, see spc4r17 | |
338 | * section 7.7.3.8 | |
339 | * | |
340 | * Get the PROTOCOL IDENTIFIER as defined by spc4r17 | |
341 | * section 7.5.1 Table 362 | |
342 | */ | |
343 | check_tpgi: | |
e3d6f909 | 344 | if (dev->se_sub_dev->t10_alua.alua_type != |
c66ac9db NB |
345 | SPC3_ALUA_EMULATED) |
346 | goto check_scsi_name; | |
347 | ||
348 | if (((len + 4) + 8) > cmd->data_length) { | |
349 | len += 8; | |
350 | goto check_lu_gp; | |
351 | } | |
352 | tg_pt_gp_mem = port->sep_alua_tg_pt_gp_mem; | |
353 | if (!tg_pt_gp_mem) | |
354 | goto check_lu_gp; | |
355 | ||
356 | spin_lock(&tg_pt_gp_mem->tg_pt_gp_mem_lock); | |
357 | tg_pt_gp = tg_pt_gp_mem->tg_pt_gp; | |
6708bb27 | 358 | if (!tg_pt_gp) { |
c66ac9db NB |
359 | spin_unlock(&tg_pt_gp_mem->tg_pt_gp_mem_lock); |
360 | goto check_lu_gp; | |
361 | } | |
362 | tg_pt_gp_id = tg_pt_gp->tg_pt_gp_id; | |
363 | spin_unlock(&tg_pt_gp_mem->tg_pt_gp_mem_lock); | |
364 | ||
365 | buf[off] = | |
e3d6f909 | 366 | (tpg->se_tpg_tfo->get_fabric_proto_ident(tpg) << 4); |
c66ac9db NB |
367 | buf[off++] |= 0x1; /* CODE SET == Binary */ |
368 | buf[off] = 0x80; /* Set PIV=1 */ | |
163cd5fa | 369 | /* Set ASSOCIATION == target port: 01b */ |
c66ac9db NB |
370 | buf[off] |= 0x10; |
371 | /* DESIGNATOR TYPE == Target port group identifier */ | |
372 | buf[off++] |= 0x5; | |
373 | off++; /* Skip over Reserved */ | |
374 | buf[off++] = 4; /* DESIGNATOR LENGTH */ | |
375 | off += 2; /* Skip over Reserved Field */ | |
376 | buf[off++] = ((tg_pt_gp_id >> 8) & 0xff); | |
377 | buf[off++] = (tg_pt_gp_id & 0xff); | |
378 | len += 8; /* Header size + Designation descriptor */ | |
379 | /* | |
380 | * Logical Unit Group identifier, see spc4r17 | |
381 | * section 7.7.3.8 | |
382 | */ | |
383 | check_lu_gp: | |
384 | if (((len + 4) + 8) > cmd->data_length) { | |
385 | len += 8; | |
386 | goto check_scsi_name; | |
387 | } | |
388 | lu_gp_mem = dev->dev_alua_lu_gp_mem; | |
6708bb27 | 389 | if (!lu_gp_mem) |
c66ac9db NB |
390 | goto check_scsi_name; |
391 | ||
392 | spin_lock(&lu_gp_mem->lu_gp_mem_lock); | |
393 | lu_gp = lu_gp_mem->lu_gp; | |
6708bb27 | 394 | if (!lu_gp) { |
c66ac9db NB |
395 | spin_unlock(&lu_gp_mem->lu_gp_mem_lock); |
396 | goto check_scsi_name; | |
397 | } | |
398 | lu_gp_id = lu_gp->lu_gp_id; | |
399 | spin_unlock(&lu_gp_mem->lu_gp_mem_lock); | |
400 | ||
401 | buf[off++] |= 0x1; /* CODE SET == Binary */ | |
402 | /* DESIGNATOR TYPE == Logical Unit Group identifier */ | |
403 | buf[off++] |= 0x6; | |
404 | off++; /* Skip over Reserved */ | |
405 | buf[off++] = 4; /* DESIGNATOR LENGTH */ | |
406 | off += 2; /* Skip over Reserved Field */ | |
407 | buf[off++] = ((lu_gp_id >> 8) & 0xff); | |
408 | buf[off++] = (lu_gp_id & 0xff); | |
409 | len += 8; /* Header size + Designation descriptor */ | |
410 | /* | |
411 | * SCSI name string designator, see spc4r17 | |
412 | * section 7.7.3.11 | |
413 | * | |
414 | * Get the PROTOCOL IDENTIFIER as defined by spc4r17 | |
415 | * section 7.5.1 Table 362 | |
416 | */ | |
417 | check_scsi_name: | |
e3d6f909 | 418 | scsi_name_len = strlen(tpg->se_tpg_tfo->tpg_get_wwn(tpg)); |
c66ac9db NB |
419 | /* UTF-8 ",t,0x<16-bit TPGT>" + NULL Terminator */ |
420 | scsi_name_len += 10; | |
421 | /* Check for 4-byte padding */ | |
422 | padding = ((-scsi_name_len) & 3); | |
423 | if (padding != 0) | |
424 | scsi_name_len += padding; | |
425 | /* Header size + Designation descriptor */ | |
426 | scsi_name_len += 4; | |
427 | ||
428 | if (((len + 4) + scsi_name_len) > cmd->data_length) { | |
429 | len += scsi_name_len; | |
430 | goto set_len; | |
431 | } | |
432 | buf[off] = | |
e3d6f909 | 433 | (tpg->se_tpg_tfo->get_fabric_proto_ident(tpg) << 4); |
c66ac9db NB |
434 | buf[off++] |= 0x3; /* CODE SET == UTF-8 */ |
435 | buf[off] = 0x80; /* Set PIV=1 */ | |
163cd5fa | 436 | /* Set ASSOCIATION == target port: 01b */ |
c66ac9db NB |
437 | buf[off] |= 0x10; |
438 | /* DESIGNATOR TYPE == SCSI name string */ | |
439 | buf[off++] |= 0x8; | |
440 | off += 2; /* Skip over Reserved and length */ | |
441 | /* | |
442 | * SCSI name string identifer containing, $FABRIC_MOD | |
443 | * dependent information. For LIO-Target and iSCSI | |
444 | * Target Port, this means "<iSCSI name>,t,0x<TPGT> in | |
445 | * UTF-8 encoding. | |
446 | */ | |
e3d6f909 | 447 | tpgt = tpg->se_tpg_tfo->tpg_get_tag(tpg); |
c66ac9db | 448 | scsi_name_len = sprintf(&buf[off], "%s,t,0x%04x", |
e3d6f909 | 449 | tpg->se_tpg_tfo->tpg_get_wwn(tpg), tpgt); |
c66ac9db NB |
450 | scsi_name_len += 1 /* Include NULL terminator */; |
451 | /* | |
452 | * The null-terminated, null-padded (see 4.4.2) SCSI | |
453 | * NAME STRING field contains a UTF-8 format string. | |
454 | * The number of bytes in the SCSI NAME STRING field | |
455 | * (i.e., the value in the DESIGNATOR LENGTH field) | |
456 | * shall be no larger than 256 and shall be a multiple | |
457 | * of four. | |
458 | */ | |
459 | if (padding) | |
460 | scsi_name_len += padding; | |
461 | ||
462 | buf[off-1] = scsi_name_len; | |
463 | off += scsi_name_len; | |
464 | /* Header size + Designation descriptor */ | |
465 | len += (scsi_name_len + 4); | |
466 | } | |
467 | set_len: | |
468 | buf[2] = ((len >> 8) & 0xff); | |
469 | buf[3] = (len & 0xff); /* Page Length for VPD 0x83 */ | |
470 | return 0; | |
471 | } | |
472 | ||
473 | /* Extended INQUIRY Data VPD Page */ | |
474 | static int | |
475 | target_emulate_evpd_86(struct se_cmd *cmd, unsigned char *buf) | |
476 | { | |
477 | if (cmd->data_length < 60) | |
478 | return 0; | |
479 | ||
c66ac9db NB |
480 | buf[2] = 0x3c; |
481 | /* Set HEADSUP, ORDSUP, SIMPSUP */ | |
482 | buf[5] = 0x07; | |
483 | ||
484 | /* If WriteCache emulation is enabled, set V_SUP */ | |
5951146d | 485 | if (cmd->se_dev->se_sub_dev->se_dev_attrib.emulate_write_cache > 0) |
c66ac9db NB |
486 | buf[6] = 0x01; |
487 | return 0; | |
488 | } | |
489 | ||
490 | /* Block Limits VPD page */ | |
491 | static int | |
492 | target_emulate_evpd_b0(struct se_cmd *cmd, unsigned char *buf) | |
493 | { | |
5951146d | 494 | struct se_device *dev = cmd->se_dev; |
c66ac9db NB |
495 | int have_tp = 0; |
496 | ||
497 | /* | |
498 | * Following sbc3r22 section 6.5.3 Block Limits VPD page, when | |
499 | * emulate_tpu=1 or emulate_tpws=1 we will be expect a | |
500 | * different page length for Thin Provisioning. | |
501 | */ | |
e3d6f909 | 502 | if (dev->se_sub_dev->se_dev_attrib.emulate_tpu || dev->se_sub_dev->se_dev_attrib.emulate_tpws) |
c66ac9db NB |
503 | have_tp = 1; |
504 | ||
505 | if (cmd->data_length < (0x10 + 4)) { | |
6708bb27 | 506 | pr_debug("Received data_length: %u" |
c66ac9db NB |
507 | " too small for EVPD 0xb0\n", |
508 | cmd->data_length); | |
e3d6f909 | 509 | return -EINVAL; |
c66ac9db NB |
510 | } |
511 | ||
512 | if (have_tp && cmd->data_length < (0x3c + 4)) { | |
6708bb27 | 513 | pr_debug("Received data_length: %u" |
c66ac9db NB |
514 | " too small for TPE=1 EVPD 0xb0\n", |
515 | cmd->data_length); | |
516 | have_tp = 0; | |
517 | } | |
518 | ||
519 | buf[0] = dev->transport->get_device_type(dev); | |
c66ac9db NB |
520 | buf[3] = have_tp ? 0x3c : 0x10; |
521 | ||
6708bb27 AG |
522 | /* Set WSNZ to 1 */ |
523 | buf[4] = 0x01; | |
524 | ||
c66ac9db NB |
525 | /* |
526 | * Set OPTIMAL TRANSFER LENGTH GRANULARITY | |
527 | */ | |
528 | put_unaligned_be16(1, &buf[6]); | |
529 | ||
530 | /* | |
531 | * Set MAXIMUM TRANSFER LENGTH | |
532 | */ | |
e3d6f909 | 533 | put_unaligned_be32(dev->se_sub_dev->se_dev_attrib.max_sectors, &buf[8]); |
c66ac9db NB |
534 | |
535 | /* | |
536 | * Set OPTIMAL TRANSFER LENGTH | |
537 | */ | |
e3d6f909 | 538 | put_unaligned_be32(dev->se_sub_dev->se_dev_attrib.optimal_sectors, &buf[12]); |
c66ac9db NB |
539 | |
540 | /* | |
541 | * Exit now if we don't support TP or the initiator sent a too | |
542 | * short buffer. | |
543 | */ | |
544 | if (!have_tp || cmd->data_length < (0x3c + 4)) | |
545 | return 0; | |
546 | ||
547 | /* | |
548 | * Set MAXIMUM UNMAP LBA COUNT | |
549 | */ | |
e3d6f909 | 550 | put_unaligned_be32(dev->se_sub_dev->se_dev_attrib.max_unmap_lba_count, &buf[20]); |
c66ac9db NB |
551 | |
552 | /* | |
553 | * Set MAXIMUM UNMAP BLOCK DESCRIPTOR COUNT | |
554 | */ | |
e3d6f909 | 555 | put_unaligned_be32(dev->se_sub_dev->se_dev_attrib.max_unmap_block_desc_count, |
c66ac9db NB |
556 | &buf[24]); |
557 | ||
558 | /* | |
559 | * Set OPTIMAL UNMAP GRANULARITY | |
560 | */ | |
e3d6f909 | 561 | put_unaligned_be32(dev->se_sub_dev->se_dev_attrib.unmap_granularity, &buf[28]); |
c66ac9db NB |
562 | |
563 | /* | |
564 | * UNMAP GRANULARITY ALIGNMENT | |
565 | */ | |
e3d6f909 | 566 | put_unaligned_be32(dev->se_sub_dev->se_dev_attrib.unmap_granularity_alignment, |
c66ac9db | 567 | &buf[32]); |
e3d6f909 | 568 | if (dev->se_sub_dev->se_dev_attrib.unmap_granularity_alignment != 0) |
c66ac9db NB |
569 | buf[32] |= 0x80; /* Set the UGAVALID bit */ |
570 | ||
571 | return 0; | |
572 | } | |
573 | ||
e22a7f07 RD |
574 | /* Block Device Characteristics VPD page */ |
575 | static int | |
576 | target_emulate_evpd_b1(struct se_cmd *cmd, unsigned char *buf) | |
577 | { | |
578 | struct se_device *dev = cmd->se_dev; | |
579 | ||
580 | buf[0] = dev->transport->get_device_type(dev); | |
581 | buf[3] = 0x3c; | |
582 | ||
583 | if (cmd->data_length >= 5 && | |
584 | dev->se_sub_dev->se_dev_attrib.is_nonrot) | |
585 | buf[5] = 1; | |
586 | ||
587 | return 0; | |
588 | } | |
589 | ||
c66ac9db NB |
590 | /* Thin Provisioning VPD */ |
591 | static int | |
592 | target_emulate_evpd_b2(struct se_cmd *cmd, unsigned char *buf) | |
593 | { | |
5951146d | 594 | struct se_device *dev = cmd->se_dev; |
c66ac9db NB |
595 | |
596 | /* | |
597 | * From sbc3r22 section 6.5.4 Thin Provisioning VPD page: | |
598 | * | |
599 | * The PAGE LENGTH field is defined in SPC-4. If the DP bit is set to | |
600 | * zero, then the page length shall be set to 0004h. If the DP bit | |
601 | * is set to one, then the page length shall be set to the value | |
602 | * defined in table 162. | |
603 | */ | |
604 | buf[0] = dev->transport->get_device_type(dev); | |
c66ac9db NB |
605 | |
606 | /* | |
607 | * Set Hardcoded length mentioned above for DP=0 | |
608 | */ | |
609 | put_unaligned_be16(0x0004, &buf[2]); | |
610 | ||
611 | /* | |
612 | * The THRESHOLD EXPONENT field indicates the threshold set size in | |
613 | * LBAs as a power of 2 (i.e., the threshold set size is equal to | |
614 | * 2(threshold exponent)). | |
615 | * | |
616 | * Note that this is currently set to 0x00 as mkp says it will be | |
617 | * changing again. We can enable this once it has settled in T10 | |
618 | * and is actually used by Linux/SCSI ML code. | |
619 | */ | |
620 | buf[4] = 0x00; | |
621 | ||
622 | /* | |
623 | * A TPU bit set to one indicates that the device server supports | |
624 | * the UNMAP command (see 5.25). A TPU bit set to zero indicates | |
625 | * that the device server does not support the UNMAP command. | |
626 | */ | |
e3d6f909 | 627 | if (dev->se_sub_dev->se_dev_attrib.emulate_tpu != 0) |
c66ac9db NB |
628 | buf[5] = 0x80; |
629 | ||
630 | /* | |
631 | * A TPWS bit set to one indicates that the device server supports | |
632 | * the use of the WRITE SAME (16) command (see 5.42) to unmap LBAs. | |
633 | * A TPWS bit set to zero indicates that the device server does not | |
634 | * support the use of the WRITE SAME (16) command to unmap LBAs. | |
635 | */ | |
e3d6f909 | 636 | if (dev->se_sub_dev->se_dev_attrib.emulate_tpws != 0) |
c66ac9db NB |
637 | buf[5] |= 0x40; |
638 | ||
639 | return 0; | |
640 | } | |
641 | ||
b2eb705e RD |
642 | static int |
643 | target_emulate_evpd_00(struct se_cmd *cmd, unsigned char *buf); | |
644 | ||
645 | static struct { | |
646 | uint8_t page; | |
647 | int (*emulate)(struct se_cmd *, unsigned char *); | |
648 | } evpd_handlers[] = { | |
649 | { .page = 0x00, .emulate = target_emulate_evpd_00 }, | |
650 | { .page = 0x80, .emulate = target_emulate_evpd_80 }, | |
651 | { .page = 0x83, .emulate = target_emulate_evpd_83 }, | |
652 | { .page = 0x86, .emulate = target_emulate_evpd_86 }, | |
653 | { .page = 0xb0, .emulate = target_emulate_evpd_b0 }, | |
e22a7f07 | 654 | { .page = 0xb1, .emulate = target_emulate_evpd_b1 }, |
b2eb705e RD |
655 | { .page = 0xb2, .emulate = target_emulate_evpd_b2 }, |
656 | }; | |
657 | ||
658 | /* supported vital product data pages */ | |
659 | static int | |
660 | target_emulate_evpd_00(struct se_cmd *cmd, unsigned char *buf) | |
661 | { | |
662 | int p; | |
663 | ||
664 | if (cmd->data_length < 8) | |
665 | return 0; | |
666 | /* | |
667 | * Only report the INQUIRY EVPD=1 pages after a valid NAA | |
668 | * Registered Extended LUN WWN has been set via ConfigFS | |
669 | * during device creation/restart. | |
670 | */ | |
671 | if (cmd->se_dev->se_sub_dev->su_dev_flags & | |
672 | SDF_EMULATED_VPD_UNIT_SERIAL) { | |
673 | buf[3] = ARRAY_SIZE(evpd_handlers); | |
674 | for (p = 0; p < min_t(int, ARRAY_SIZE(evpd_handlers), | |
675 | cmd->data_length - 4); ++p) | |
676 | buf[p + 4] = evpd_handlers[p].page; | |
677 | } | |
678 | ||
679 | return 0; | |
680 | } | |
681 | ||
c66ac9db NB |
682 | static int |
683 | target_emulate_inquiry(struct se_cmd *cmd) | |
684 | { | |
5951146d | 685 | struct se_device *dev = cmd->se_dev; |
05d1c7c0 | 686 | unsigned char *buf; |
a1d8b49a | 687 | unsigned char *cdb = cmd->t_task_cdb; |
05d1c7c0 | 688 | int p, ret; |
c66ac9db NB |
689 | |
690 | if (!(cdb[1] & 0x1)) | |
691 | return target_emulate_inquiry_std(cmd); | |
692 | ||
693 | /* | |
694 | * Make sure we at least have 4 bytes of INQUIRY response | |
695 | * payload for 0x00 going back for EVPD=1. Note that 0x80 | |
696 | * and 0x83 will check for enough payload data length and | |
697 | * jump to set_len: label when there is not enough inquiry EVPD | |
698 | * payload length left for the next outgoing EVPD metadata | |
699 | */ | |
700 | if (cmd->data_length < 4) { | |
6708bb27 | 701 | pr_err("SCSI Inquiry payload length: %u" |
c66ac9db | 702 | " too small for EVPD=1\n", cmd->data_length); |
e3d6f909 | 703 | return -EINVAL; |
c66ac9db | 704 | } |
05d1c7c0 AG |
705 | |
706 | buf = transport_kmap_first_data_page(cmd); | |
707 | ||
c66ac9db NB |
708 | buf[0] = dev->transport->get_device_type(dev); |
709 | ||
b2eb705e RD |
710 | for (p = 0; p < ARRAY_SIZE(evpd_handlers); ++p) |
711 | if (cdb[2] == evpd_handlers[p].page) { | |
712 | buf[1] = cdb[2]; | |
05d1c7c0 AG |
713 | ret = evpd_handlers[p].emulate(cmd, buf); |
714 | transport_kunmap_first_data_page(cmd); | |
715 | return ret; | |
b2eb705e | 716 | } |
c66ac9db | 717 | |
05d1c7c0 | 718 | transport_kunmap_first_data_page(cmd); |
6708bb27 | 719 | pr_err("Unknown VPD Code: 0x%02x\n", cdb[2]); |
b2eb705e | 720 | return -EINVAL; |
c66ac9db NB |
721 | } |
722 | ||
723 | static int | |
724 | target_emulate_readcapacity(struct se_cmd *cmd) | |
725 | { | |
5951146d | 726 | struct se_device *dev = cmd->se_dev; |
05d1c7c0 | 727 | unsigned char *buf; |
904f0bc4 NB |
728 | unsigned long long blocks_long = dev->transport->get_blocks(dev); |
729 | u32 blocks; | |
730 | ||
731 | if (blocks_long >= 0x00000000ffffffff) | |
732 | blocks = 0xffffffff; | |
733 | else | |
734 | blocks = (u32)blocks_long; | |
c66ac9db | 735 | |
05d1c7c0 AG |
736 | buf = transport_kmap_first_data_page(cmd); |
737 | ||
c66ac9db NB |
738 | buf[0] = (blocks >> 24) & 0xff; |
739 | buf[1] = (blocks >> 16) & 0xff; | |
740 | buf[2] = (blocks >> 8) & 0xff; | |
741 | buf[3] = blocks & 0xff; | |
e3d6f909 AG |
742 | buf[4] = (dev->se_sub_dev->se_dev_attrib.block_size >> 24) & 0xff; |
743 | buf[5] = (dev->se_sub_dev->se_dev_attrib.block_size >> 16) & 0xff; | |
744 | buf[6] = (dev->se_sub_dev->se_dev_attrib.block_size >> 8) & 0xff; | |
745 | buf[7] = dev->se_sub_dev->se_dev_attrib.block_size & 0xff; | |
c66ac9db NB |
746 | /* |
747 | * Set max 32-bit blocks to signal SERVICE ACTION READ_CAPACITY_16 | |
748 | */ | |
e3d6f909 | 749 | if (dev->se_sub_dev->se_dev_attrib.emulate_tpu || dev->se_sub_dev->se_dev_attrib.emulate_tpws) |
c66ac9db NB |
750 | put_unaligned_be32(0xFFFFFFFF, &buf[0]); |
751 | ||
05d1c7c0 AG |
752 | transport_kunmap_first_data_page(cmd); |
753 | ||
c66ac9db NB |
754 | return 0; |
755 | } | |
756 | ||
757 | static int | |
758 | target_emulate_readcapacity_16(struct se_cmd *cmd) | |
759 | { | |
5951146d | 760 | struct se_device *dev = cmd->se_dev; |
05d1c7c0 | 761 | unsigned char *buf; |
c66ac9db NB |
762 | unsigned long long blocks = dev->transport->get_blocks(dev); |
763 | ||
05d1c7c0 AG |
764 | buf = transport_kmap_first_data_page(cmd); |
765 | ||
c66ac9db NB |
766 | buf[0] = (blocks >> 56) & 0xff; |
767 | buf[1] = (blocks >> 48) & 0xff; | |
768 | buf[2] = (blocks >> 40) & 0xff; | |
769 | buf[3] = (blocks >> 32) & 0xff; | |
770 | buf[4] = (blocks >> 24) & 0xff; | |
771 | buf[5] = (blocks >> 16) & 0xff; | |
772 | buf[6] = (blocks >> 8) & 0xff; | |
773 | buf[7] = blocks & 0xff; | |
e3d6f909 AG |
774 | buf[8] = (dev->se_sub_dev->se_dev_attrib.block_size >> 24) & 0xff; |
775 | buf[9] = (dev->se_sub_dev->se_dev_attrib.block_size >> 16) & 0xff; | |
776 | buf[10] = (dev->se_sub_dev->se_dev_attrib.block_size >> 8) & 0xff; | |
777 | buf[11] = dev->se_sub_dev->se_dev_attrib.block_size & 0xff; | |
c66ac9db NB |
778 | /* |
779 | * Set Thin Provisioning Enable bit following sbc3r22 in section | |
780 | * READ CAPACITY (16) byte 14 if emulate_tpu or emulate_tpws is enabled. | |
781 | */ | |
e3d6f909 | 782 | if (dev->se_sub_dev->se_dev_attrib.emulate_tpu || dev->se_sub_dev->se_dev_attrib.emulate_tpws) |
c66ac9db NB |
783 | buf[14] = 0x80; |
784 | ||
05d1c7c0 AG |
785 | transport_kunmap_first_data_page(cmd); |
786 | ||
c66ac9db NB |
787 | return 0; |
788 | } | |
789 | ||
790 | static int | |
791 | target_modesense_rwrecovery(unsigned char *p) | |
792 | { | |
793 | p[0] = 0x01; | |
794 | p[1] = 0x0a; | |
795 | ||
796 | return 12; | |
797 | } | |
798 | ||
799 | static int | |
800 | target_modesense_control(struct se_device *dev, unsigned char *p) | |
801 | { | |
802 | p[0] = 0x0a; | |
803 | p[1] = 0x0a; | |
804 | p[2] = 2; | |
5de619a3 NB |
805 | /* |
806 | * From spc4r23, 7.4.7 Control mode page | |
807 | * | |
808 | * The QUEUE ALGORITHM MODIFIER field (see table 368) specifies | |
809 | * restrictions on the algorithm used for reordering commands | |
810 | * having the SIMPLE task attribute (see SAM-4). | |
811 | * | |
812 | * Table 368 -- QUEUE ALGORITHM MODIFIER field | |
813 | * Code Description | |
814 | * 0h Restricted reordering | |
815 | * 1h Unrestricted reordering allowed | |
816 | * 2h to 7h Reserved | |
817 | * 8h to Fh Vendor specific | |
818 | * | |
819 | * A value of zero in the QUEUE ALGORITHM MODIFIER field specifies that | |
820 | * the device server shall order the processing sequence of commands | |
821 | * having the SIMPLE task attribute such that data integrity is maintained | |
822 | * for that I_T nexus (i.e., if the transmission of new SCSI transport protocol | |
823 | * requests is halted at any time, the final value of all data observable | |
824 | * on the medium shall be the same as if all the commands had been processed | |
825 | * with the ORDERED task attribute). | |
826 | * | |
827 | * A value of one in the QUEUE ALGORITHM MODIFIER field specifies that the | |
828 | * device server may reorder the processing sequence of commands having the | |
829 | * SIMPLE task attribute in any manner. Any data integrity exposures related to | |
830 | * command sequence order shall be explicitly handled by the application client | |
831 | * through the selection of appropriate ommands and task attributes. | |
832 | */ | |
833 | p[3] = (dev->se_sub_dev->se_dev_attrib.emulate_rest_reord == 1) ? 0x00 : 0x10; | |
c66ac9db NB |
834 | /* |
835 | * From spc4r17, section 7.4.6 Control mode Page | |
836 | * | |
837 | * Unit Attention interlocks control (UN_INTLCK_CTRL) to code 00b | |
838 | * | |
839 | * 00b: The logical unit shall clear any unit attention condition | |
840 | * reported in the same I_T_L_Q nexus transaction as a CHECK CONDITION | |
841 | * status and shall not establish a unit attention condition when a com- | |
842 | * mand is completed with BUSY, TASK SET FULL, or RESERVATION CONFLICT | |
843 | * status. | |
844 | * | |
845 | * 10b: The logical unit shall not clear any unit attention condition | |
846 | * reported in the same I_T_L_Q nexus transaction as a CHECK CONDITION | |
847 | * status and shall not establish a unit attention condition when | |
848 | * a command is completed with BUSY, TASK SET FULL, or RESERVATION | |
849 | * CONFLICT status. | |
850 | * | |
851 | * 11b a The logical unit shall not clear any unit attention condition | |
852 | * reported in the same I_T_L_Q nexus transaction as a CHECK CONDITION | |
853 | * status and shall establish a unit attention condition for the | |
854 | * initiator port associated with the I_T nexus on which the BUSY, | |
855 | * TASK SET FULL, or RESERVATION CONFLICT status is being returned. | |
856 | * Depending on the status, the additional sense code shall be set to | |
857 | * PREVIOUS BUSY STATUS, PREVIOUS TASK SET FULL STATUS, or PREVIOUS | |
858 | * RESERVATION CONFLICT STATUS. Until it is cleared by a REQUEST SENSE | |
859 | * command, a unit attention condition shall be established only once | |
860 | * for a BUSY, TASK SET FULL, or RESERVATION CONFLICT status regardless | |
861 | * to the number of commands completed with one of those status codes. | |
862 | */ | |
e3d6f909 AG |
863 | p[4] = (dev->se_sub_dev->se_dev_attrib.emulate_ua_intlck_ctrl == 2) ? 0x30 : |
864 | (dev->se_sub_dev->se_dev_attrib.emulate_ua_intlck_ctrl == 1) ? 0x20 : 0x00; | |
c66ac9db NB |
865 | /* |
866 | * From spc4r17, section 7.4.6 Control mode Page | |
867 | * | |
868 | * Task Aborted Status (TAS) bit set to zero. | |
869 | * | |
870 | * A task aborted status (TAS) bit set to zero specifies that aborted | |
871 | * tasks shall be terminated by the device server without any response | |
872 | * to the application client. A TAS bit set to one specifies that tasks | |
873 | * aborted by the actions of an I_T nexus other than the I_T nexus on | |
874 | * which the command was received shall be completed with TASK ABORTED | |
875 | * status (see SAM-4). | |
876 | */ | |
e3d6f909 | 877 | p[5] = (dev->se_sub_dev->se_dev_attrib.emulate_tas) ? 0x40 : 0x00; |
c66ac9db NB |
878 | p[8] = 0xff; |
879 | p[9] = 0xff; | |
880 | p[11] = 30; | |
881 | ||
882 | return 12; | |
883 | } | |
884 | ||
885 | static int | |
886 | target_modesense_caching(struct se_device *dev, unsigned char *p) | |
887 | { | |
888 | p[0] = 0x08; | |
889 | p[1] = 0x12; | |
e3d6f909 | 890 | if (dev->se_sub_dev->se_dev_attrib.emulate_write_cache > 0) |
c66ac9db NB |
891 | p[2] = 0x04; /* Write Cache Enable */ |
892 | p[12] = 0x20; /* Disabled Read Ahead */ | |
893 | ||
894 | return 20; | |
895 | } | |
896 | ||
897 | static void | |
898 | target_modesense_write_protect(unsigned char *buf, int type) | |
899 | { | |
900 | /* | |
901 | * I believe that the WP bit (bit 7) in the mode header is the same for | |
902 | * all device types.. | |
903 | */ | |
904 | switch (type) { | |
905 | case TYPE_DISK: | |
906 | case TYPE_TAPE: | |
907 | default: | |
908 | buf[0] |= 0x80; /* WP bit */ | |
909 | break; | |
910 | } | |
911 | } | |
912 | ||
913 | static void | |
914 | target_modesense_dpofua(unsigned char *buf, int type) | |
915 | { | |
916 | switch (type) { | |
917 | case TYPE_DISK: | |
918 | buf[0] |= 0x10; /* DPOFUA bit */ | |
919 | break; | |
920 | default: | |
921 | break; | |
922 | } | |
923 | } | |
924 | ||
925 | static int | |
926 | target_emulate_modesense(struct se_cmd *cmd, int ten) | |
927 | { | |
5951146d | 928 | struct se_device *dev = cmd->se_dev; |
a1d8b49a | 929 | char *cdb = cmd->t_task_cdb; |
05d1c7c0 | 930 | unsigned char *rbuf; |
c66ac9db NB |
931 | int type = dev->transport->get_device_type(dev); |
932 | int offset = (ten) ? 8 : 4; | |
933 | int length = 0; | |
934 | unsigned char buf[SE_MODE_PAGE_BUF]; | |
935 | ||
936 | memset(buf, 0, SE_MODE_PAGE_BUF); | |
937 | ||
938 | switch (cdb[2] & 0x3f) { | |
939 | case 0x01: | |
940 | length = target_modesense_rwrecovery(&buf[offset]); | |
941 | break; | |
942 | case 0x08: | |
943 | length = target_modesense_caching(dev, &buf[offset]); | |
944 | break; | |
945 | case 0x0a: | |
946 | length = target_modesense_control(dev, &buf[offset]); | |
947 | break; | |
948 | case 0x3f: | |
949 | length = target_modesense_rwrecovery(&buf[offset]); | |
950 | length += target_modesense_caching(dev, &buf[offset+length]); | |
951 | length += target_modesense_control(dev, &buf[offset+length]); | |
952 | break; | |
953 | default: | |
f15ea578 RD |
954 | pr_err("MODE SENSE: unimplemented page/subpage: 0x%02x/0x%02x\n", |
955 | cdb[2] & 0x3f, cdb[3]); | |
c66ac9db NB |
956 | return PYX_TRANSPORT_UNKNOWN_MODE_PAGE; |
957 | } | |
958 | offset += length; | |
959 | ||
960 | if (ten) { | |
961 | offset -= 2; | |
962 | buf[0] = (offset >> 8) & 0xff; | |
963 | buf[1] = offset & 0xff; | |
964 | ||
e3d6f909 | 965 | if ((cmd->se_lun->lun_access & TRANSPORT_LUNFLAGS_READ_ONLY) || |
c66ac9db NB |
966 | (cmd->se_deve && |
967 | (cmd->se_deve->lun_flags & TRANSPORT_LUNFLAGS_READ_ONLY))) | |
968 | target_modesense_write_protect(&buf[3], type); | |
969 | ||
e3d6f909 AG |
970 | if ((dev->se_sub_dev->se_dev_attrib.emulate_write_cache > 0) && |
971 | (dev->se_sub_dev->se_dev_attrib.emulate_fua_write > 0)) | |
c66ac9db NB |
972 | target_modesense_dpofua(&buf[3], type); |
973 | ||
974 | if ((offset + 2) > cmd->data_length) | |
975 | offset = cmd->data_length; | |
976 | ||
977 | } else { | |
978 | offset -= 1; | |
979 | buf[0] = offset & 0xff; | |
980 | ||
e3d6f909 | 981 | if ((cmd->se_lun->lun_access & TRANSPORT_LUNFLAGS_READ_ONLY) || |
c66ac9db NB |
982 | (cmd->se_deve && |
983 | (cmd->se_deve->lun_flags & TRANSPORT_LUNFLAGS_READ_ONLY))) | |
984 | target_modesense_write_protect(&buf[2], type); | |
985 | ||
e3d6f909 AG |
986 | if ((dev->se_sub_dev->se_dev_attrib.emulate_write_cache > 0) && |
987 | (dev->se_sub_dev->se_dev_attrib.emulate_fua_write > 0)) | |
c66ac9db NB |
988 | target_modesense_dpofua(&buf[2], type); |
989 | ||
990 | if ((offset + 1) > cmd->data_length) | |
991 | offset = cmd->data_length; | |
992 | } | |
05d1c7c0 AG |
993 | |
994 | rbuf = transport_kmap_first_data_page(cmd); | |
c66ac9db | 995 | memcpy(rbuf, buf, offset); |
05d1c7c0 | 996 | transport_kunmap_first_data_page(cmd); |
c66ac9db NB |
997 | |
998 | return 0; | |
999 | } | |
1000 | ||
1001 | static int | |
1002 | target_emulate_request_sense(struct se_cmd *cmd) | |
1003 | { | |
a1d8b49a | 1004 | unsigned char *cdb = cmd->t_task_cdb; |
05d1c7c0 | 1005 | unsigned char *buf; |
c66ac9db | 1006 | u8 ua_asc = 0, ua_ascq = 0; |
05d1c7c0 | 1007 | int err = 0; |
c66ac9db NB |
1008 | |
1009 | if (cdb[1] & 0x01) { | |
6708bb27 | 1010 | pr_err("REQUEST_SENSE description emulation not" |
c66ac9db NB |
1011 | " supported\n"); |
1012 | return PYX_TRANSPORT_INVALID_CDB_FIELD; | |
1013 | } | |
05d1c7c0 AG |
1014 | |
1015 | buf = transport_kmap_first_data_page(cmd); | |
1016 | ||
6708bb27 | 1017 | if (!core_scsi3_ua_clear_for_request_sense(cmd, &ua_asc, &ua_ascq)) { |
c66ac9db NB |
1018 | /* |
1019 | * CURRENT ERROR, UNIT ATTENTION | |
1020 | */ | |
1021 | buf[0] = 0x70; | |
1022 | buf[SPC_SENSE_KEY_OFFSET] = UNIT_ATTENTION; | |
1023 | /* | |
1024 | * Make sure request data length is enough for additional | |
1025 | * sense data. | |
1026 | */ | |
1027 | if (cmd->data_length <= 18) { | |
1028 | buf[7] = 0x00; | |
05d1c7c0 AG |
1029 | err = -EINVAL; |
1030 | goto end; | |
c66ac9db NB |
1031 | } |
1032 | /* | |
1033 | * The Additional Sense Code (ASC) from the UNIT ATTENTION | |
1034 | */ | |
1035 | buf[SPC_ASC_KEY_OFFSET] = ua_asc; | |
1036 | buf[SPC_ASCQ_KEY_OFFSET] = ua_ascq; | |
1037 | buf[7] = 0x0A; | |
1038 | } else { | |
1039 | /* | |
1040 | * CURRENT ERROR, NO SENSE | |
1041 | */ | |
1042 | buf[0] = 0x70; | |
1043 | buf[SPC_SENSE_KEY_OFFSET] = NO_SENSE; | |
1044 | /* | |
1045 | * Make sure request data length is enough for additional | |
1046 | * sense data. | |
1047 | */ | |
1048 | if (cmd->data_length <= 18) { | |
1049 | buf[7] = 0x00; | |
05d1c7c0 AG |
1050 | err = -EINVAL; |
1051 | goto end; | |
c66ac9db NB |
1052 | } |
1053 | /* | |
1054 | * NO ADDITIONAL SENSE INFORMATION | |
1055 | */ | |
1056 | buf[SPC_ASC_KEY_OFFSET] = 0x00; | |
1057 | buf[7] = 0x0A; | |
1058 | } | |
1059 | ||
05d1c7c0 AG |
1060 | end: |
1061 | transport_kunmap_first_data_page(cmd); | |
1062 | ||
c66ac9db NB |
1063 | return 0; |
1064 | } | |
1065 | ||
1066 | /* | |
1067 | * Used for TCM/IBLOCK and TCM/FILEIO for block/blk-lib.c level discard support. | |
1068 | * Note this is not used for TCM/pSCSI passthrough | |
1069 | */ | |
1070 | static int | |
1071 | target_emulate_unmap(struct se_task *task) | |
1072 | { | |
e3d6f909 | 1073 | struct se_cmd *cmd = task->task_se_cmd; |
5951146d | 1074 | struct se_device *dev = cmd->se_dev; |
05d1c7c0 | 1075 | unsigned char *buf, *ptr = NULL; |
a1d8b49a | 1076 | unsigned char *cdb = &cmd->t_task_cdb[0]; |
c66ac9db NB |
1077 | sector_t lba; |
1078 | unsigned int size = cmd->data_length, range; | |
05d1c7c0 | 1079 | int ret = 0, offset; |
c66ac9db NB |
1080 | unsigned short dl, bd_dl; |
1081 | ||
1082 | /* First UNMAP block descriptor starts at 8 byte offset */ | |
1083 | offset = 8; | |
1084 | size -= 8; | |
1085 | dl = get_unaligned_be16(&cdb[0]); | |
1086 | bd_dl = get_unaligned_be16(&cdb[2]); | |
05d1c7c0 AG |
1087 | |
1088 | buf = transport_kmap_first_data_page(cmd); | |
1089 | ||
c66ac9db | 1090 | ptr = &buf[offset]; |
6708bb27 | 1091 | pr_debug("UNMAP: Sub: %s Using dl: %hu bd_dl: %hu size: %hu" |
c66ac9db NB |
1092 | " ptr: %p\n", dev->transport->name, dl, bd_dl, size, ptr); |
1093 | ||
1094 | while (size) { | |
1095 | lba = get_unaligned_be64(&ptr[0]); | |
1096 | range = get_unaligned_be32(&ptr[8]); | |
6708bb27 | 1097 | pr_debug("UNMAP: Using lba: %llu and range: %u\n", |
c66ac9db NB |
1098 | (unsigned long long)lba, range); |
1099 | ||
1100 | ret = dev->transport->do_discard(dev, lba, range); | |
1101 | if (ret < 0) { | |
6708bb27 | 1102 | pr_err("blkdev_issue_discard() failed: %d\n", |
c66ac9db | 1103 | ret); |
05d1c7c0 | 1104 | goto err; |
c66ac9db NB |
1105 | } |
1106 | ||
1107 | ptr += 16; | |
1108 | size -= 16; | |
1109 | } | |
1110 | ||
05d1c7c0 AG |
1111 | err: |
1112 | transport_kunmap_first_data_page(cmd); | |
1113 | ||
1114 | return ret; | |
c66ac9db NB |
1115 | } |
1116 | ||
1117 | /* | |
1118 | * Used for TCM/IBLOCK and TCM/FILEIO for block/blk-lib.c level discard support. | |
1119 | * Note this is not used for TCM/pSCSI passthrough | |
1120 | */ | |
1121 | static int | |
706d5860 | 1122 | target_emulate_write_same(struct se_task *task, u32 num_blocks) |
c66ac9db | 1123 | { |
e3d6f909 | 1124 | struct se_cmd *cmd = task->task_se_cmd; |
5951146d | 1125 | struct se_device *dev = cmd->se_dev; |
a1d8b49a AG |
1126 | sector_t range; |
1127 | sector_t lba = cmd->t_task_lba; | |
c66ac9db | 1128 | int ret; |
dd3a5ad8 | 1129 | /* |
706d5860 NB |
1130 | * Use the explicit range when non zero is supplied, otherwise calculate |
1131 | * the remaining range based on ->get_blocks() - starting LBA. | |
dd3a5ad8 | 1132 | */ |
dd3a5ad8 NB |
1133 | if (num_blocks != 0) |
1134 | range = num_blocks; | |
1135 | else | |
1136 | range = (dev->transport->get_blocks(dev) - lba); | |
c66ac9db | 1137 | |
6708bb27 | 1138 | pr_debug("WRITE_SAME UNMAP: LBA: %llu Range: %llu\n", |
dd3a5ad8 | 1139 | (unsigned long long)lba, (unsigned long long)range); |
c66ac9db NB |
1140 | |
1141 | ret = dev->transport->do_discard(dev, lba, range); | |
1142 | if (ret < 0) { | |
6708bb27 | 1143 | pr_debug("blkdev_issue_discard() failed for WRITE_SAME\n"); |
e3d6f909 | 1144 | return ret; |
c66ac9db NB |
1145 | } |
1146 | ||
c66ac9db NB |
1147 | return 0; |
1148 | } | |
1149 | ||
1150 | int | |
1151 | transport_emulate_control_cdb(struct se_task *task) | |
1152 | { | |
e3d6f909 | 1153 | struct se_cmd *cmd = task->task_se_cmd; |
5951146d | 1154 | struct se_device *dev = cmd->se_dev; |
c66ac9db NB |
1155 | unsigned short service_action; |
1156 | int ret = 0; | |
1157 | ||
a1d8b49a | 1158 | switch (cmd->t_task_cdb[0]) { |
c66ac9db NB |
1159 | case INQUIRY: |
1160 | ret = target_emulate_inquiry(cmd); | |
1161 | break; | |
1162 | case READ_CAPACITY: | |
1163 | ret = target_emulate_readcapacity(cmd); | |
1164 | break; | |
1165 | case MODE_SENSE: | |
1166 | ret = target_emulate_modesense(cmd, 0); | |
1167 | break; | |
1168 | case MODE_SENSE_10: | |
1169 | ret = target_emulate_modesense(cmd, 1); | |
1170 | break; | |
1171 | case SERVICE_ACTION_IN: | |
a1d8b49a | 1172 | switch (cmd->t_task_cdb[1] & 0x1f) { |
c66ac9db NB |
1173 | case SAI_READ_CAPACITY_16: |
1174 | ret = target_emulate_readcapacity_16(cmd); | |
1175 | break; | |
1176 | default: | |
6708bb27 | 1177 | pr_err("Unsupported SA: 0x%02x\n", |
a1d8b49a | 1178 | cmd->t_task_cdb[1] & 0x1f); |
c66ac9db NB |
1179 | return PYX_TRANSPORT_UNKNOWN_SAM_OPCODE; |
1180 | } | |
1181 | break; | |
1182 | case REQUEST_SENSE: | |
1183 | ret = target_emulate_request_sense(cmd); | |
1184 | break; | |
1185 | case UNMAP: | |
1186 | if (!dev->transport->do_discard) { | |
6708bb27 | 1187 | pr_err("UNMAP emulation not supported for: %s\n", |
c66ac9db NB |
1188 | dev->transport->name); |
1189 | return PYX_TRANSPORT_UNKNOWN_SAM_OPCODE; | |
1190 | } | |
1191 | ret = target_emulate_unmap(task); | |
1192 | break; | |
706d5860 NB |
1193 | case WRITE_SAME: |
1194 | if (!dev->transport->do_discard) { | |
1195 | pr_err("WRITE_SAME emulation not supported" | |
1196 | " for: %s\n", dev->transport->name); | |
1197 | return PYX_TRANSPORT_UNKNOWN_SAM_OPCODE; | |
1198 | } | |
1199 | ret = target_emulate_write_same(task, | |
1200 | get_unaligned_be16(&cmd->t_task_cdb[7])); | |
1201 | break; | |
c66ac9db NB |
1202 | case WRITE_SAME_16: |
1203 | if (!dev->transport->do_discard) { | |
6708bb27 | 1204 | pr_err("WRITE_SAME_16 emulation not supported" |
c66ac9db NB |
1205 | " for: %s\n", dev->transport->name); |
1206 | return PYX_TRANSPORT_UNKNOWN_SAM_OPCODE; | |
1207 | } | |
706d5860 NB |
1208 | ret = target_emulate_write_same(task, |
1209 | get_unaligned_be32(&cmd->t_task_cdb[10])); | |
c66ac9db NB |
1210 | break; |
1211 | case VARIABLE_LENGTH_CMD: | |
1212 | service_action = | |
a1d8b49a | 1213 | get_unaligned_be16(&cmd->t_task_cdb[8]); |
c66ac9db NB |
1214 | switch (service_action) { |
1215 | case WRITE_SAME_32: | |
1216 | if (!dev->transport->do_discard) { | |
6708bb27 | 1217 | pr_err("WRITE_SAME_32 SA emulation not" |
c66ac9db NB |
1218 | " supported for: %s\n", |
1219 | dev->transport->name); | |
1220 | return PYX_TRANSPORT_UNKNOWN_SAM_OPCODE; | |
1221 | } | |
706d5860 NB |
1222 | ret = target_emulate_write_same(task, |
1223 | get_unaligned_be32(&cmd->t_task_cdb[28])); | |
c66ac9db NB |
1224 | break; |
1225 | default: | |
6708bb27 | 1226 | pr_err("Unsupported VARIABLE_LENGTH_CMD SA:" |
c66ac9db NB |
1227 | " 0x%02x\n", service_action); |
1228 | break; | |
1229 | } | |
1230 | break; | |
1231 | case SYNCHRONIZE_CACHE: | |
1232 | case 0x91: /* SYNCHRONIZE_CACHE_16: */ | |
1233 | if (!dev->transport->do_sync_cache) { | |
6708bb27 | 1234 | pr_err("SYNCHRONIZE_CACHE emulation not supported" |
c66ac9db NB |
1235 | " for: %s\n", dev->transport->name); |
1236 | return PYX_TRANSPORT_UNKNOWN_SAM_OPCODE; | |
1237 | } | |
1238 | dev->transport->do_sync_cache(task); | |
1239 | break; | |
1240 | case ALLOW_MEDIUM_REMOVAL: | |
1241 | case ERASE: | |
1242 | case REZERO_UNIT: | |
1243 | case SEEK_10: | |
1244 | case SPACE: | |
1245 | case START_STOP: | |
1246 | case TEST_UNIT_READY: | |
1247 | case VERIFY: | |
1248 | case WRITE_FILEMARKS: | |
1249 | break; | |
1250 | default: | |
6708bb27 | 1251 | pr_err("Unsupported SCSI Opcode: 0x%02x for %s\n", |
a1d8b49a | 1252 | cmd->t_task_cdb[0], dev->transport->name); |
c66ac9db NB |
1253 | return PYX_TRANSPORT_UNKNOWN_SAM_OPCODE; |
1254 | } | |
1255 | ||
1256 | if (ret < 0) | |
1257 | return ret; | |
72f4ba1e NB |
1258 | /* |
1259 | * Handle the successful completion here unless a caller | |
1260 | * has explictly requested an asychronous completion. | |
1261 | */ | |
1262 | if (!(cmd->se_cmd_flags & SCF_EMULATE_CDB_ASYNC)) { | |
1263 | task->task_scsi_status = GOOD; | |
1264 | transport_complete_task(task, 1); | |
1265 | } | |
c66ac9db NB |
1266 | |
1267 | return PYX_TRANSPORT_SENT_TO_TRANSPORT; | |
1268 | } | |
485fd0d1 CH |
1269 | |
1270 | /* | |
1271 | * Write a CDB into @cdb that is based on the one the intiator sent us, | |
1272 | * but updated to only cover the sectors that the current task handles. | |
1273 | */ | |
1274 | void target_get_task_cdb(struct se_task *task, unsigned char *cdb) | |
1275 | { | |
1276 | struct se_cmd *cmd = task->task_se_cmd; | |
b937d270 | 1277 | unsigned int cdb_len = scsi_command_size(cmd->t_task_cdb); |
485fd0d1 | 1278 | |
b937d270 | 1279 | memcpy(cdb, cmd->t_task_cdb, cdb_len); |
485fd0d1 | 1280 | if (cmd->se_cmd_flags & SCF_SCSI_DATA_SG_IO_CDB) { |
b937d270 CH |
1281 | unsigned long long lba = task->task_lba; |
1282 | u32 sectors = task->task_sectors; | |
1283 | ||
1284 | switch (cdb_len) { | |
1285 | case 6: | |
1286 | /* 21-bit LBA and 8-bit sectors */ | |
1287 | cdb[1] = (lba >> 16) & 0x1f; | |
1288 | cdb[2] = (lba >> 8) & 0xff; | |
1289 | cdb[3] = lba & 0xff; | |
1290 | cdb[4] = sectors & 0xff; | |
1291 | break; | |
1292 | case 10: | |
1293 | /* 32-bit LBA and 16-bit sectors */ | |
1294 | put_unaligned_be32(lba, &cdb[2]); | |
1295 | put_unaligned_be16(sectors, &cdb[7]); | |
1296 | break; | |
1297 | case 12: | |
1298 | /* 32-bit LBA and 32-bit sectors */ | |
1299 | put_unaligned_be32(lba, &cdb[2]); | |
1300 | put_unaligned_be32(sectors, &cdb[6]); | |
1301 | break; | |
1302 | case 16: | |
1303 | /* 64-bit LBA and 32-bit sectors */ | |
1304 | put_unaligned_be64(lba, &cdb[2]); | |
1305 | put_unaligned_be32(sectors, &cdb[10]); | |
1306 | break; | |
1307 | case 32: | |
1308 | /* 64-bit LBA and 32-bit sectors, extended CDB */ | |
1309 | put_unaligned_be64(lba, &cdb[12]); | |
1310 | put_unaligned_be32(sectors, &cdb[28]); | |
1311 | break; | |
1312 | default: | |
1313 | BUG(); | |
1314 | } | |
485fd0d1 CH |
1315 | } |
1316 | } | |
1317 | EXPORT_SYMBOL(target_get_task_cdb); |