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 | ||
157 | /* | |
158 | * Device identification VPD, for a complete list of | |
159 | * DESIGNATOR TYPEs see spc4r17 Table 459. | |
160 | */ | |
161 | static int | |
162 | target_emulate_evpd_83(struct se_cmd *cmd, unsigned char *buf) | |
163 | { | |
5951146d | 164 | struct se_device *dev = cmd->se_dev; |
e3d6f909 | 165 | struct se_lun *lun = cmd->se_lun; |
c66ac9db NB |
166 | struct se_port *port = NULL; |
167 | struct se_portal_group *tpg = NULL; | |
168 | struct t10_alua_lu_gp_member *lu_gp_mem; | |
169 | struct t10_alua_tg_pt_gp *tg_pt_gp; | |
170 | struct t10_alua_tg_pt_gp_member *tg_pt_gp_mem; | |
e3d6f909 | 171 | unsigned char *prod = &dev->se_sub_dev->t10_wwn.model[0]; |
c66ac9db NB |
172 | u32 prod_len; |
173 | u32 unit_serial_len, off = 0; | |
c66ac9db NB |
174 | u16 len = 0, id_len; |
175 | ||
c66ac9db NB |
176 | off = 4; |
177 | ||
178 | /* | |
179 | * NAA IEEE Registered Extended Assigned designator format, see | |
180 | * spc4r17 section 7.7.3.6.5 | |
181 | * | |
182 | * We depend upon a target_core_mod/ConfigFS provided | |
183 | * /sys/kernel/config/target/core/$HBA/$DEV/wwn/vpd_unit_serial | |
184 | * value in order to return the NAA id. | |
185 | */ | |
186 | if (!(dev->se_sub_dev->su_dev_flags & SDF_EMULATED_VPD_UNIT_SERIAL)) | |
187 | goto check_t10_vend_desc; | |
188 | ||
189 | if (off + 20 > cmd->data_length) | |
190 | goto check_t10_vend_desc; | |
191 | ||
192 | /* CODE SET == Binary */ | |
193 | buf[off++] = 0x1; | |
194 | ||
163cd5fa | 195 | /* Set ASSOCIATION == addressed logical unit: 0)b */ |
c66ac9db NB |
196 | buf[off] = 0x00; |
197 | ||
198 | /* Identifier/Designator type == NAA identifier */ | |
163cd5fa | 199 | buf[off++] |= 0x3; |
c66ac9db NB |
200 | off++; |
201 | ||
202 | /* Identifier/Designator length */ | |
203 | buf[off++] = 0x10; | |
204 | ||
205 | /* | |
206 | * Start NAA IEEE Registered Extended Identifier/Designator | |
207 | */ | |
208 | buf[off++] = (0x6 << 4); | |
209 | ||
210 | /* | |
211 | * Use OpenFabrics IEEE Company ID: 00 14 05 | |
212 | */ | |
213 | buf[off++] = 0x01; | |
214 | buf[off++] = 0x40; | |
215 | buf[off] = (0x5 << 4); | |
216 | ||
217 | /* | |
218 | * Return ConfigFS Unit Serial Number information for | |
219 | * VENDOR_SPECIFIC_IDENTIFIER and | |
220 | * VENDOR_SPECIFIC_IDENTIFIER_EXTENTION | |
221 | */ | |
11650b85 AS |
222 | buf[off++] |= hex_to_bin(dev->se_sub_dev->t10_wwn.unit_serial[0]); |
223 | hex2bin(&buf[off], &dev->se_sub_dev->t10_wwn.unit_serial[1], 12); | |
224 | ||
c66ac9db NB |
225 | len = 20; |
226 | off = (len + 4); | |
227 | ||
228 | check_t10_vend_desc: | |
229 | /* | |
230 | * T10 Vendor Identifier Page, see spc4r17 section 7.7.3.4 | |
231 | */ | |
232 | id_len = 8; /* For Vendor field */ | |
233 | prod_len = 4; /* For VPD Header */ | |
234 | prod_len += 8; /* For Vendor field */ | |
235 | prod_len += strlen(prod); | |
236 | prod_len++; /* For : */ | |
237 | ||
238 | if (dev->se_sub_dev->su_dev_flags & | |
239 | SDF_EMULATED_VPD_UNIT_SERIAL) { | |
240 | unit_serial_len = | |
e3d6f909 | 241 | strlen(&dev->se_sub_dev->t10_wwn.unit_serial[0]); |
c66ac9db NB |
242 | unit_serial_len++; /* For NULL Terminator */ |
243 | ||
244 | if ((len + (id_len + 4) + | |
245 | (prod_len + unit_serial_len)) > | |
246 | cmd->data_length) { | |
247 | len += (prod_len + unit_serial_len); | |
248 | goto check_port; | |
249 | } | |
250 | id_len += sprintf((unsigned char *)&buf[off+12], | |
251 | "%s:%s", prod, | |
e3d6f909 | 252 | &dev->se_sub_dev->t10_wwn.unit_serial[0]); |
c66ac9db NB |
253 | } |
254 | buf[off] = 0x2; /* ASCII */ | |
255 | buf[off+1] = 0x1; /* T10 Vendor ID */ | |
256 | buf[off+2] = 0x0; | |
257 | memcpy((unsigned char *)&buf[off+4], "LIO-ORG", 8); | |
258 | /* Extra Byte for NULL Terminator */ | |
259 | id_len++; | |
260 | /* Identifier Length */ | |
261 | buf[off+3] = id_len; | |
262 | /* Header size for Designation descriptor */ | |
263 | len += (id_len + 4); | |
264 | off += (id_len + 4); | |
265 | /* | |
266 | * struct se_port is only set for INQUIRY VPD=1 through $FABRIC_MOD | |
267 | */ | |
268 | check_port: | |
269 | port = lun->lun_sep; | |
270 | if (port) { | |
271 | struct t10_alua_lu_gp *lu_gp; | |
272 | u32 padding, scsi_name_len; | |
273 | u16 lu_gp_id = 0; | |
274 | u16 tg_pt_gp_id = 0; | |
275 | u16 tpgt; | |
276 | ||
277 | tpg = port->sep_tpg; | |
278 | /* | |
279 | * Relative target port identifer, see spc4r17 | |
280 | * section 7.7.3.7 | |
281 | * | |
282 | * Get the PROTOCOL IDENTIFIER as defined by spc4r17 | |
283 | * section 7.5.1 Table 362 | |
284 | */ | |
285 | if (((len + 4) + 8) > cmd->data_length) { | |
286 | len += 8; | |
287 | goto check_tpgi; | |
288 | } | |
289 | buf[off] = | |
e3d6f909 | 290 | (tpg->se_tpg_tfo->get_fabric_proto_ident(tpg) << 4); |
c66ac9db NB |
291 | buf[off++] |= 0x1; /* CODE SET == Binary */ |
292 | buf[off] = 0x80; /* Set PIV=1 */ | |
163cd5fa | 293 | /* Set ASSOCIATION == target port: 01b */ |
c66ac9db NB |
294 | buf[off] |= 0x10; |
295 | /* DESIGNATOR TYPE == Relative target port identifer */ | |
296 | buf[off++] |= 0x4; | |
297 | off++; /* Skip over Reserved */ | |
298 | buf[off++] = 4; /* DESIGNATOR LENGTH */ | |
299 | /* Skip over Obsolete field in RTPI payload | |
300 | * in Table 472 */ | |
301 | off += 2; | |
302 | buf[off++] = ((port->sep_rtpi >> 8) & 0xff); | |
303 | buf[off++] = (port->sep_rtpi & 0xff); | |
304 | len += 8; /* Header size + Designation descriptor */ | |
305 | /* | |
306 | * Target port group identifier, see spc4r17 | |
307 | * section 7.7.3.8 | |
308 | * | |
309 | * Get the PROTOCOL IDENTIFIER as defined by spc4r17 | |
310 | * section 7.5.1 Table 362 | |
311 | */ | |
312 | check_tpgi: | |
e3d6f909 | 313 | if (dev->se_sub_dev->t10_alua.alua_type != |
c66ac9db NB |
314 | SPC3_ALUA_EMULATED) |
315 | goto check_scsi_name; | |
316 | ||
317 | if (((len + 4) + 8) > cmd->data_length) { | |
318 | len += 8; | |
319 | goto check_lu_gp; | |
320 | } | |
321 | tg_pt_gp_mem = port->sep_alua_tg_pt_gp_mem; | |
322 | if (!tg_pt_gp_mem) | |
323 | goto check_lu_gp; | |
324 | ||
325 | spin_lock(&tg_pt_gp_mem->tg_pt_gp_mem_lock); | |
326 | tg_pt_gp = tg_pt_gp_mem->tg_pt_gp; | |
6708bb27 | 327 | if (!tg_pt_gp) { |
c66ac9db NB |
328 | spin_unlock(&tg_pt_gp_mem->tg_pt_gp_mem_lock); |
329 | goto check_lu_gp; | |
330 | } | |
331 | tg_pt_gp_id = tg_pt_gp->tg_pt_gp_id; | |
332 | spin_unlock(&tg_pt_gp_mem->tg_pt_gp_mem_lock); | |
333 | ||
334 | buf[off] = | |
e3d6f909 | 335 | (tpg->se_tpg_tfo->get_fabric_proto_ident(tpg) << 4); |
c66ac9db NB |
336 | buf[off++] |= 0x1; /* CODE SET == Binary */ |
337 | buf[off] = 0x80; /* Set PIV=1 */ | |
163cd5fa | 338 | /* Set ASSOCIATION == target port: 01b */ |
c66ac9db NB |
339 | buf[off] |= 0x10; |
340 | /* DESIGNATOR TYPE == Target port group identifier */ | |
341 | buf[off++] |= 0x5; | |
342 | off++; /* Skip over Reserved */ | |
343 | buf[off++] = 4; /* DESIGNATOR LENGTH */ | |
344 | off += 2; /* Skip over Reserved Field */ | |
345 | buf[off++] = ((tg_pt_gp_id >> 8) & 0xff); | |
346 | buf[off++] = (tg_pt_gp_id & 0xff); | |
347 | len += 8; /* Header size + Designation descriptor */ | |
348 | /* | |
349 | * Logical Unit Group identifier, see spc4r17 | |
350 | * section 7.7.3.8 | |
351 | */ | |
352 | check_lu_gp: | |
353 | if (((len + 4) + 8) > cmd->data_length) { | |
354 | len += 8; | |
355 | goto check_scsi_name; | |
356 | } | |
357 | lu_gp_mem = dev->dev_alua_lu_gp_mem; | |
6708bb27 | 358 | if (!lu_gp_mem) |
c66ac9db NB |
359 | goto check_scsi_name; |
360 | ||
361 | spin_lock(&lu_gp_mem->lu_gp_mem_lock); | |
362 | lu_gp = lu_gp_mem->lu_gp; | |
6708bb27 | 363 | if (!lu_gp) { |
c66ac9db NB |
364 | spin_unlock(&lu_gp_mem->lu_gp_mem_lock); |
365 | goto check_scsi_name; | |
366 | } | |
367 | lu_gp_id = lu_gp->lu_gp_id; | |
368 | spin_unlock(&lu_gp_mem->lu_gp_mem_lock); | |
369 | ||
370 | buf[off++] |= 0x1; /* CODE SET == Binary */ | |
371 | /* DESIGNATOR TYPE == Logical Unit Group identifier */ | |
372 | buf[off++] |= 0x6; | |
373 | off++; /* Skip over Reserved */ | |
374 | buf[off++] = 4; /* DESIGNATOR LENGTH */ | |
375 | off += 2; /* Skip over Reserved Field */ | |
376 | buf[off++] = ((lu_gp_id >> 8) & 0xff); | |
377 | buf[off++] = (lu_gp_id & 0xff); | |
378 | len += 8; /* Header size + Designation descriptor */ | |
379 | /* | |
380 | * SCSI name string designator, see spc4r17 | |
381 | * section 7.7.3.11 | |
382 | * | |
383 | * Get the PROTOCOL IDENTIFIER as defined by spc4r17 | |
384 | * section 7.5.1 Table 362 | |
385 | */ | |
386 | check_scsi_name: | |
e3d6f909 | 387 | scsi_name_len = strlen(tpg->se_tpg_tfo->tpg_get_wwn(tpg)); |
c66ac9db NB |
388 | /* UTF-8 ",t,0x<16-bit TPGT>" + NULL Terminator */ |
389 | scsi_name_len += 10; | |
390 | /* Check for 4-byte padding */ | |
391 | padding = ((-scsi_name_len) & 3); | |
392 | if (padding != 0) | |
393 | scsi_name_len += padding; | |
394 | /* Header size + Designation descriptor */ | |
395 | scsi_name_len += 4; | |
396 | ||
397 | if (((len + 4) + scsi_name_len) > cmd->data_length) { | |
398 | len += scsi_name_len; | |
399 | goto set_len; | |
400 | } | |
401 | buf[off] = | |
e3d6f909 | 402 | (tpg->se_tpg_tfo->get_fabric_proto_ident(tpg) << 4); |
c66ac9db NB |
403 | buf[off++] |= 0x3; /* CODE SET == UTF-8 */ |
404 | buf[off] = 0x80; /* Set PIV=1 */ | |
163cd5fa | 405 | /* Set ASSOCIATION == target port: 01b */ |
c66ac9db NB |
406 | buf[off] |= 0x10; |
407 | /* DESIGNATOR TYPE == SCSI name string */ | |
408 | buf[off++] |= 0x8; | |
409 | off += 2; /* Skip over Reserved and length */ | |
410 | /* | |
411 | * SCSI name string identifer containing, $FABRIC_MOD | |
412 | * dependent information. For LIO-Target and iSCSI | |
413 | * Target Port, this means "<iSCSI name>,t,0x<TPGT> in | |
414 | * UTF-8 encoding. | |
415 | */ | |
e3d6f909 | 416 | tpgt = tpg->se_tpg_tfo->tpg_get_tag(tpg); |
c66ac9db | 417 | scsi_name_len = sprintf(&buf[off], "%s,t,0x%04x", |
e3d6f909 | 418 | tpg->se_tpg_tfo->tpg_get_wwn(tpg), tpgt); |
c66ac9db NB |
419 | scsi_name_len += 1 /* Include NULL terminator */; |
420 | /* | |
421 | * The null-terminated, null-padded (see 4.4.2) SCSI | |
422 | * NAME STRING field contains a UTF-8 format string. | |
423 | * The number of bytes in the SCSI NAME STRING field | |
424 | * (i.e., the value in the DESIGNATOR LENGTH field) | |
425 | * shall be no larger than 256 and shall be a multiple | |
426 | * of four. | |
427 | */ | |
428 | if (padding) | |
429 | scsi_name_len += padding; | |
430 | ||
431 | buf[off-1] = scsi_name_len; | |
432 | off += scsi_name_len; | |
433 | /* Header size + Designation descriptor */ | |
434 | len += (scsi_name_len + 4); | |
435 | } | |
436 | set_len: | |
437 | buf[2] = ((len >> 8) & 0xff); | |
438 | buf[3] = (len & 0xff); /* Page Length for VPD 0x83 */ | |
439 | return 0; | |
440 | } | |
441 | ||
442 | /* Extended INQUIRY Data VPD Page */ | |
443 | static int | |
444 | target_emulate_evpd_86(struct se_cmd *cmd, unsigned char *buf) | |
445 | { | |
446 | if (cmd->data_length < 60) | |
447 | return 0; | |
448 | ||
c66ac9db NB |
449 | buf[2] = 0x3c; |
450 | /* Set HEADSUP, ORDSUP, SIMPSUP */ | |
451 | buf[5] = 0x07; | |
452 | ||
453 | /* If WriteCache emulation is enabled, set V_SUP */ | |
5951146d | 454 | if (cmd->se_dev->se_sub_dev->se_dev_attrib.emulate_write_cache > 0) |
c66ac9db NB |
455 | buf[6] = 0x01; |
456 | return 0; | |
457 | } | |
458 | ||
459 | /* Block Limits VPD page */ | |
460 | static int | |
461 | target_emulate_evpd_b0(struct se_cmd *cmd, unsigned char *buf) | |
462 | { | |
5951146d | 463 | struct se_device *dev = cmd->se_dev; |
c66ac9db NB |
464 | int have_tp = 0; |
465 | ||
466 | /* | |
467 | * Following sbc3r22 section 6.5.3 Block Limits VPD page, when | |
468 | * emulate_tpu=1 or emulate_tpws=1 we will be expect a | |
469 | * different page length for Thin Provisioning. | |
470 | */ | |
e3d6f909 | 471 | if (dev->se_sub_dev->se_dev_attrib.emulate_tpu || dev->se_sub_dev->se_dev_attrib.emulate_tpws) |
c66ac9db NB |
472 | have_tp = 1; |
473 | ||
474 | if (cmd->data_length < (0x10 + 4)) { | |
6708bb27 | 475 | pr_debug("Received data_length: %u" |
c66ac9db NB |
476 | " too small for EVPD 0xb0\n", |
477 | cmd->data_length); | |
e3d6f909 | 478 | return -EINVAL; |
c66ac9db NB |
479 | } |
480 | ||
481 | if (have_tp && cmd->data_length < (0x3c + 4)) { | |
6708bb27 | 482 | pr_debug("Received data_length: %u" |
c66ac9db NB |
483 | " too small for TPE=1 EVPD 0xb0\n", |
484 | cmd->data_length); | |
485 | have_tp = 0; | |
486 | } | |
487 | ||
488 | buf[0] = dev->transport->get_device_type(dev); | |
c66ac9db NB |
489 | buf[3] = have_tp ? 0x3c : 0x10; |
490 | ||
6708bb27 AG |
491 | /* Set WSNZ to 1 */ |
492 | buf[4] = 0x01; | |
493 | ||
c66ac9db NB |
494 | /* |
495 | * Set OPTIMAL TRANSFER LENGTH GRANULARITY | |
496 | */ | |
497 | put_unaligned_be16(1, &buf[6]); | |
498 | ||
499 | /* | |
500 | * Set MAXIMUM TRANSFER LENGTH | |
501 | */ | |
e3d6f909 | 502 | put_unaligned_be32(dev->se_sub_dev->se_dev_attrib.max_sectors, &buf[8]); |
c66ac9db NB |
503 | |
504 | /* | |
505 | * Set OPTIMAL TRANSFER LENGTH | |
506 | */ | |
e3d6f909 | 507 | put_unaligned_be32(dev->se_sub_dev->se_dev_attrib.optimal_sectors, &buf[12]); |
c66ac9db NB |
508 | |
509 | /* | |
510 | * Exit now if we don't support TP or the initiator sent a too | |
511 | * short buffer. | |
512 | */ | |
513 | if (!have_tp || cmd->data_length < (0x3c + 4)) | |
514 | return 0; | |
515 | ||
516 | /* | |
517 | * Set MAXIMUM UNMAP LBA COUNT | |
518 | */ | |
e3d6f909 | 519 | put_unaligned_be32(dev->se_sub_dev->se_dev_attrib.max_unmap_lba_count, &buf[20]); |
c66ac9db NB |
520 | |
521 | /* | |
522 | * Set MAXIMUM UNMAP BLOCK DESCRIPTOR COUNT | |
523 | */ | |
e3d6f909 | 524 | put_unaligned_be32(dev->se_sub_dev->se_dev_attrib.max_unmap_block_desc_count, |
c66ac9db NB |
525 | &buf[24]); |
526 | ||
527 | /* | |
528 | * Set OPTIMAL UNMAP GRANULARITY | |
529 | */ | |
e3d6f909 | 530 | put_unaligned_be32(dev->se_sub_dev->se_dev_attrib.unmap_granularity, &buf[28]); |
c66ac9db NB |
531 | |
532 | /* | |
533 | * UNMAP GRANULARITY ALIGNMENT | |
534 | */ | |
e3d6f909 | 535 | put_unaligned_be32(dev->se_sub_dev->se_dev_attrib.unmap_granularity_alignment, |
c66ac9db | 536 | &buf[32]); |
e3d6f909 | 537 | if (dev->se_sub_dev->se_dev_attrib.unmap_granularity_alignment != 0) |
c66ac9db NB |
538 | buf[32] |= 0x80; /* Set the UGAVALID bit */ |
539 | ||
540 | return 0; | |
541 | } | |
542 | ||
e22a7f07 RD |
543 | /* Block Device Characteristics VPD page */ |
544 | static int | |
545 | target_emulate_evpd_b1(struct se_cmd *cmd, unsigned char *buf) | |
546 | { | |
547 | struct se_device *dev = cmd->se_dev; | |
548 | ||
549 | buf[0] = dev->transport->get_device_type(dev); | |
550 | buf[3] = 0x3c; | |
551 | ||
552 | if (cmd->data_length >= 5 && | |
553 | dev->se_sub_dev->se_dev_attrib.is_nonrot) | |
554 | buf[5] = 1; | |
555 | ||
556 | return 0; | |
557 | } | |
558 | ||
c66ac9db NB |
559 | /* Thin Provisioning VPD */ |
560 | static int | |
561 | target_emulate_evpd_b2(struct se_cmd *cmd, unsigned char *buf) | |
562 | { | |
5951146d | 563 | struct se_device *dev = cmd->se_dev; |
c66ac9db NB |
564 | |
565 | /* | |
566 | * From sbc3r22 section 6.5.4 Thin Provisioning VPD page: | |
567 | * | |
568 | * The PAGE LENGTH field is defined in SPC-4. If the DP bit is set to | |
569 | * zero, then the page length shall be set to 0004h. If the DP bit | |
570 | * is set to one, then the page length shall be set to the value | |
571 | * defined in table 162. | |
572 | */ | |
573 | buf[0] = dev->transport->get_device_type(dev); | |
c66ac9db NB |
574 | |
575 | /* | |
576 | * Set Hardcoded length mentioned above for DP=0 | |
577 | */ | |
578 | put_unaligned_be16(0x0004, &buf[2]); | |
579 | ||
580 | /* | |
581 | * The THRESHOLD EXPONENT field indicates the threshold set size in | |
582 | * LBAs as a power of 2 (i.e., the threshold set size is equal to | |
583 | * 2(threshold exponent)). | |
584 | * | |
585 | * Note that this is currently set to 0x00 as mkp says it will be | |
586 | * changing again. We can enable this once it has settled in T10 | |
587 | * and is actually used by Linux/SCSI ML code. | |
588 | */ | |
589 | buf[4] = 0x00; | |
590 | ||
591 | /* | |
592 | * A TPU bit set to one indicates that the device server supports | |
593 | * the UNMAP command (see 5.25). A TPU bit set to zero indicates | |
594 | * that the device server does not support the UNMAP command. | |
595 | */ | |
e3d6f909 | 596 | if (dev->se_sub_dev->se_dev_attrib.emulate_tpu != 0) |
c66ac9db NB |
597 | buf[5] = 0x80; |
598 | ||
599 | /* | |
600 | * A TPWS bit set to one indicates that the device server supports | |
601 | * the use of the WRITE SAME (16) command (see 5.42) to unmap LBAs. | |
602 | * A TPWS bit set to zero indicates that the device server does not | |
603 | * support the use of the WRITE SAME (16) command to unmap LBAs. | |
604 | */ | |
e3d6f909 | 605 | if (dev->se_sub_dev->se_dev_attrib.emulate_tpws != 0) |
c66ac9db NB |
606 | buf[5] |= 0x40; |
607 | ||
608 | return 0; | |
609 | } | |
610 | ||
b2eb705e RD |
611 | static int |
612 | target_emulate_evpd_00(struct se_cmd *cmd, unsigned char *buf); | |
613 | ||
614 | static struct { | |
615 | uint8_t page; | |
616 | int (*emulate)(struct se_cmd *, unsigned char *); | |
617 | } evpd_handlers[] = { | |
618 | { .page = 0x00, .emulate = target_emulate_evpd_00 }, | |
619 | { .page = 0x80, .emulate = target_emulate_evpd_80 }, | |
620 | { .page = 0x83, .emulate = target_emulate_evpd_83 }, | |
621 | { .page = 0x86, .emulate = target_emulate_evpd_86 }, | |
622 | { .page = 0xb0, .emulate = target_emulate_evpd_b0 }, | |
e22a7f07 | 623 | { .page = 0xb1, .emulate = target_emulate_evpd_b1 }, |
b2eb705e RD |
624 | { .page = 0xb2, .emulate = target_emulate_evpd_b2 }, |
625 | }; | |
626 | ||
627 | /* supported vital product data pages */ | |
628 | static int | |
629 | target_emulate_evpd_00(struct se_cmd *cmd, unsigned char *buf) | |
630 | { | |
631 | int p; | |
632 | ||
633 | if (cmd->data_length < 8) | |
634 | return 0; | |
635 | /* | |
636 | * Only report the INQUIRY EVPD=1 pages after a valid NAA | |
637 | * Registered Extended LUN WWN has been set via ConfigFS | |
638 | * during device creation/restart. | |
639 | */ | |
640 | if (cmd->se_dev->se_sub_dev->su_dev_flags & | |
641 | SDF_EMULATED_VPD_UNIT_SERIAL) { | |
642 | buf[3] = ARRAY_SIZE(evpd_handlers); | |
643 | for (p = 0; p < min_t(int, ARRAY_SIZE(evpd_handlers), | |
644 | cmd->data_length - 4); ++p) | |
645 | buf[p + 4] = evpd_handlers[p].page; | |
646 | } | |
647 | ||
648 | return 0; | |
649 | } | |
650 | ||
c66ac9db NB |
651 | static int |
652 | target_emulate_inquiry(struct se_cmd *cmd) | |
653 | { | |
5951146d | 654 | struct se_device *dev = cmd->se_dev; |
05d1c7c0 | 655 | unsigned char *buf; |
a1d8b49a | 656 | unsigned char *cdb = cmd->t_task_cdb; |
05d1c7c0 | 657 | int p, ret; |
c66ac9db NB |
658 | |
659 | if (!(cdb[1] & 0x1)) | |
660 | return target_emulate_inquiry_std(cmd); | |
661 | ||
662 | /* | |
663 | * Make sure we at least have 4 bytes of INQUIRY response | |
664 | * payload for 0x00 going back for EVPD=1. Note that 0x80 | |
665 | * and 0x83 will check for enough payload data length and | |
666 | * jump to set_len: label when there is not enough inquiry EVPD | |
667 | * payload length left for the next outgoing EVPD metadata | |
668 | */ | |
669 | if (cmd->data_length < 4) { | |
6708bb27 | 670 | pr_err("SCSI Inquiry payload length: %u" |
c66ac9db | 671 | " too small for EVPD=1\n", cmd->data_length); |
e3d6f909 | 672 | return -EINVAL; |
c66ac9db | 673 | } |
05d1c7c0 AG |
674 | |
675 | buf = transport_kmap_first_data_page(cmd); | |
676 | ||
c66ac9db NB |
677 | buf[0] = dev->transport->get_device_type(dev); |
678 | ||
b2eb705e RD |
679 | for (p = 0; p < ARRAY_SIZE(evpd_handlers); ++p) |
680 | if (cdb[2] == evpd_handlers[p].page) { | |
681 | buf[1] = cdb[2]; | |
05d1c7c0 AG |
682 | ret = evpd_handlers[p].emulate(cmd, buf); |
683 | transport_kunmap_first_data_page(cmd); | |
684 | return ret; | |
b2eb705e | 685 | } |
c66ac9db | 686 | |
05d1c7c0 | 687 | transport_kunmap_first_data_page(cmd); |
6708bb27 | 688 | pr_err("Unknown VPD Code: 0x%02x\n", cdb[2]); |
b2eb705e | 689 | return -EINVAL; |
c66ac9db NB |
690 | } |
691 | ||
692 | static int | |
693 | target_emulate_readcapacity(struct se_cmd *cmd) | |
694 | { | |
5951146d | 695 | struct se_device *dev = cmd->se_dev; |
05d1c7c0 | 696 | unsigned char *buf; |
904f0bc4 NB |
697 | unsigned long long blocks_long = dev->transport->get_blocks(dev); |
698 | u32 blocks; | |
699 | ||
700 | if (blocks_long >= 0x00000000ffffffff) | |
701 | blocks = 0xffffffff; | |
702 | else | |
703 | blocks = (u32)blocks_long; | |
c66ac9db | 704 | |
05d1c7c0 AG |
705 | buf = transport_kmap_first_data_page(cmd); |
706 | ||
c66ac9db NB |
707 | buf[0] = (blocks >> 24) & 0xff; |
708 | buf[1] = (blocks >> 16) & 0xff; | |
709 | buf[2] = (blocks >> 8) & 0xff; | |
710 | buf[3] = blocks & 0xff; | |
e3d6f909 AG |
711 | buf[4] = (dev->se_sub_dev->se_dev_attrib.block_size >> 24) & 0xff; |
712 | buf[5] = (dev->se_sub_dev->se_dev_attrib.block_size >> 16) & 0xff; | |
713 | buf[6] = (dev->se_sub_dev->se_dev_attrib.block_size >> 8) & 0xff; | |
714 | buf[7] = dev->se_sub_dev->se_dev_attrib.block_size & 0xff; | |
c66ac9db NB |
715 | /* |
716 | * Set max 32-bit blocks to signal SERVICE ACTION READ_CAPACITY_16 | |
717 | */ | |
e3d6f909 | 718 | if (dev->se_sub_dev->se_dev_attrib.emulate_tpu || dev->se_sub_dev->se_dev_attrib.emulate_tpws) |
c66ac9db NB |
719 | put_unaligned_be32(0xFFFFFFFF, &buf[0]); |
720 | ||
05d1c7c0 AG |
721 | transport_kunmap_first_data_page(cmd); |
722 | ||
c66ac9db NB |
723 | return 0; |
724 | } | |
725 | ||
726 | static int | |
727 | target_emulate_readcapacity_16(struct se_cmd *cmd) | |
728 | { | |
5951146d | 729 | struct se_device *dev = cmd->se_dev; |
05d1c7c0 | 730 | unsigned char *buf; |
c66ac9db NB |
731 | unsigned long long blocks = dev->transport->get_blocks(dev); |
732 | ||
05d1c7c0 AG |
733 | buf = transport_kmap_first_data_page(cmd); |
734 | ||
c66ac9db NB |
735 | buf[0] = (blocks >> 56) & 0xff; |
736 | buf[1] = (blocks >> 48) & 0xff; | |
737 | buf[2] = (blocks >> 40) & 0xff; | |
738 | buf[3] = (blocks >> 32) & 0xff; | |
739 | buf[4] = (blocks >> 24) & 0xff; | |
740 | buf[5] = (blocks >> 16) & 0xff; | |
741 | buf[6] = (blocks >> 8) & 0xff; | |
742 | buf[7] = blocks & 0xff; | |
e3d6f909 AG |
743 | buf[8] = (dev->se_sub_dev->se_dev_attrib.block_size >> 24) & 0xff; |
744 | buf[9] = (dev->se_sub_dev->se_dev_attrib.block_size >> 16) & 0xff; | |
745 | buf[10] = (dev->se_sub_dev->se_dev_attrib.block_size >> 8) & 0xff; | |
746 | buf[11] = dev->se_sub_dev->se_dev_attrib.block_size & 0xff; | |
c66ac9db NB |
747 | /* |
748 | * Set Thin Provisioning Enable bit following sbc3r22 in section | |
749 | * READ CAPACITY (16) byte 14 if emulate_tpu or emulate_tpws is enabled. | |
750 | */ | |
e3d6f909 | 751 | if (dev->se_sub_dev->se_dev_attrib.emulate_tpu || dev->se_sub_dev->se_dev_attrib.emulate_tpws) |
c66ac9db NB |
752 | buf[14] = 0x80; |
753 | ||
05d1c7c0 AG |
754 | transport_kunmap_first_data_page(cmd); |
755 | ||
c66ac9db NB |
756 | return 0; |
757 | } | |
758 | ||
759 | static int | |
760 | target_modesense_rwrecovery(unsigned char *p) | |
761 | { | |
762 | p[0] = 0x01; | |
763 | p[1] = 0x0a; | |
764 | ||
765 | return 12; | |
766 | } | |
767 | ||
768 | static int | |
769 | target_modesense_control(struct se_device *dev, unsigned char *p) | |
770 | { | |
771 | p[0] = 0x0a; | |
772 | p[1] = 0x0a; | |
773 | p[2] = 2; | |
5de619a3 NB |
774 | /* |
775 | * From spc4r23, 7.4.7 Control mode page | |
776 | * | |
777 | * The QUEUE ALGORITHM MODIFIER field (see table 368) specifies | |
778 | * restrictions on the algorithm used for reordering commands | |
779 | * having the SIMPLE task attribute (see SAM-4). | |
780 | * | |
781 | * Table 368 -- QUEUE ALGORITHM MODIFIER field | |
782 | * Code Description | |
783 | * 0h Restricted reordering | |
784 | * 1h Unrestricted reordering allowed | |
785 | * 2h to 7h Reserved | |
786 | * 8h to Fh Vendor specific | |
787 | * | |
788 | * A value of zero in the QUEUE ALGORITHM MODIFIER field specifies that | |
789 | * the device server shall order the processing sequence of commands | |
790 | * having the SIMPLE task attribute such that data integrity is maintained | |
791 | * for that I_T nexus (i.e., if the transmission of new SCSI transport protocol | |
792 | * requests is halted at any time, the final value of all data observable | |
793 | * on the medium shall be the same as if all the commands had been processed | |
794 | * with the ORDERED task attribute). | |
795 | * | |
796 | * A value of one in the QUEUE ALGORITHM MODIFIER field specifies that the | |
797 | * device server may reorder the processing sequence of commands having the | |
798 | * SIMPLE task attribute in any manner. Any data integrity exposures related to | |
799 | * command sequence order shall be explicitly handled by the application client | |
800 | * through the selection of appropriate ommands and task attributes. | |
801 | */ | |
802 | p[3] = (dev->se_sub_dev->se_dev_attrib.emulate_rest_reord == 1) ? 0x00 : 0x10; | |
c66ac9db NB |
803 | /* |
804 | * From spc4r17, section 7.4.6 Control mode Page | |
805 | * | |
806 | * Unit Attention interlocks control (UN_INTLCK_CTRL) to code 00b | |
807 | * | |
808 | * 00b: The logical unit shall clear any unit attention condition | |
809 | * reported in the same I_T_L_Q nexus transaction as a CHECK CONDITION | |
810 | * status and shall not establish a unit attention condition when a com- | |
811 | * mand is completed with BUSY, TASK SET FULL, or RESERVATION CONFLICT | |
812 | * status. | |
813 | * | |
814 | * 10b: The logical unit shall not clear any unit attention condition | |
815 | * reported in the same I_T_L_Q nexus transaction as a CHECK CONDITION | |
816 | * status and shall not establish a unit attention condition when | |
817 | * a command is completed with BUSY, TASK SET FULL, or RESERVATION | |
818 | * CONFLICT status. | |
819 | * | |
820 | * 11b a The logical unit shall not clear any unit attention condition | |
821 | * reported in the same I_T_L_Q nexus transaction as a CHECK CONDITION | |
822 | * status and shall establish a unit attention condition for the | |
823 | * initiator port associated with the I_T nexus on which the BUSY, | |
824 | * TASK SET FULL, or RESERVATION CONFLICT status is being returned. | |
825 | * Depending on the status, the additional sense code shall be set to | |
826 | * PREVIOUS BUSY STATUS, PREVIOUS TASK SET FULL STATUS, or PREVIOUS | |
827 | * RESERVATION CONFLICT STATUS. Until it is cleared by a REQUEST SENSE | |
828 | * command, a unit attention condition shall be established only once | |
829 | * for a BUSY, TASK SET FULL, or RESERVATION CONFLICT status regardless | |
830 | * to the number of commands completed with one of those status codes. | |
831 | */ | |
e3d6f909 AG |
832 | p[4] = (dev->se_sub_dev->se_dev_attrib.emulate_ua_intlck_ctrl == 2) ? 0x30 : |
833 | (dev->se_sub_dev->se_dev_attrib.emulate_ua_intlck_ctrl == 1) ? 0x20 : 0x00; | |
c66ac9db NB |
834 | /* |
835 | * From spc4r17, section 7.4.6 Control mode Page | |
836 | * | |
837 | * Task Aborted Status (TAS) bit set to zero. | |
838 | * | |
839 | * A task aborted status (TAS) bit set to zero specifies that aborted | |
840 | * tasks shall be terminated by the device server without any response | |
841 | * to the application client. A TAS bit set to one specifies that tasks | |
842 | * aborted by the actions of an I_T nexus other than the I_T nexus on | |
843 | * which the command was received shall be completed with TASK ABORTED | |
844 | * status (see SAM-4). | |
845 | */ | |
e3d6f909 | 846 | p[5] = (dev->se_sub_dev->se_dev_attrib.emulate_tas) ? 0x40 : 0x00; |
c66ac9db NB |
847 | p[8] = 0xff; |
848 | p[9] = 0xff; | |
849 | p[11] = 30; | |
850 | ||
851 | return 12; | |
852 | } | |
853 | ||
854 | static int | |
855 | target_modesense_caching(struct se_device *dev, unsigned char *p) | |
856 | { | |
857 | p[0] = 0x08; | |
858 | p[1] = 0x12; | |
e3d6f909 | 859 | if (dev->se_sub_dev->se_dev_attrib.emulate_write_cache > 0) |
c66ac9db NB |
860 | p[2] = 0x04; /* Write Cache Enable */ |
861 | p[12] = 0x20; /* Disabled Read Ahead */ | |
862 | ||
863 | return 20; | |
864 | } | |
865 | ||
866 | static void | |
867 | target_modesense_write_protect(unsigned char *buf, int type) | |
868 | { | |
869 | /* | |
870 | * I believe that the WP bit (bit 7) in the mode header is the same for | |
871 | * all device types.. | |
872 | */ | |
873 | switch (type) { | |
874 | case TYPE_DISK: | |
875 | case TYPE_TAPE: | |
876 | default: | |
877 | buf[0] |= 0x80; /* WP bit */ | |
878 | break; | |
879 | } | |
880 | } | |
881 | ||
882 | static void | |
883 | target_modesense_dpofua(unsigned char *buf, int type) | |
884 | { | |
885 | switch (type) { | |
886 | case TYPE_DISK: | |
887 | buf[0] |= 0x10; /* DPOFUA bit */ | |
888 | break; | |
889 | default: | |
890 | break; | |
891 | } | |
892 | } | |
893 | ||
894 | static int | |
895 | target_emulate_modesense(struct se_cmd *cmd, int ten) | |
896 | { | |
5951146d | 897 | struct se_device *dev = cmd->se_dev; |
a1d8b49a | 898 | char *cdb = cmd->t_task_cdb; |
05d1c7c0 | 899 | unsigned char *rbuf; |
c66ac9db NB |
900 | int type = dev->transport->get_device_type(dev); |
901 | int offset = (ten) ? 8 : 4; | |
902 | int length = 0; | |
903 | unsigned char buf[SE_MODE_PAGE_BUF]; | |
904 | ||
905 | memset(buf, 0, SE_MODE_PAGE_BUF); | |
906 | ||
907 | switch (cdb[2] & 0x3f) { | |
908 | case 0x01: | |
909 | length = target_modesense_rwrecovery(&buf[offset]); | |
910 | break; | |
911 | case 0x08: | |
912 | length = target_modesense_caching(dev, &buf[offset]); | |
913 | break; | |
914 | case 0x0a: | |
915 | length = target_modesense_control(dev, &buf[offset]); | |
916 | break; | |
917 | case 0x3f: | |
918 | length = target_modesense_rwrecovery(&buf[offset]); | |
919 | length += target_modesense_caching(dev, &buf[offset+length]); | |
920 | length += target_modesense_control(dev, &buf[offset+length]); | |
921 | break; | |
922 | default: | |
f15ea578 RD |
923 | pr_err("MODE SENSE: unimplemented page/subpage: 0x%02x/0x%02x\n", |
924 | cdb[2] & 0x3f, cdb[3]); | |
c66ac9db NB |
925 | return PYX_TRANSPORT_UNKNOWN_MODE_PAGE; |
926 | } | |
927 | offset += length; | |
928 | ||
929 | if (ten) { | |
930 | offset -= 2; | |
931 | buf[0] = (offset >> 8) & 0xff; | |
932 | buf[1] = offset & 0xff; | |
933 | ||
e3d6f909 | 934 | if ((cmd->se_lun->lun_access & TRANSPORT_LUNFLAGS_READ_ONLY) || |
c66ac9db NB |
935 | (cmd->se_deve && |
936 | (cmd->se_deve->lun_flags & TRANSPORT_LUNFLAGS_READ_ONLY))) | |
937 | target_modesense_write_protect(&buf[3], type); | |
938 | ||
e3d6f909 AG |
939 | if ((dev->se_sub_dev->se_dev_attrib.emulate_write_cache > 0) && |
940 | (dev->se_sub_dev->se_dev_attrib.emulate_fua_write > 0)) | |
c66ac9db NB |
941 | target_modesense_dpofua(&buf[3], type); |
942 | ||
943 | if ((offset + 2) > cmd->data_length) | |
944 | offset = cmd->data_length; | |
945 | ||
946 | } else { | |
947 | offset -= 1; | |
948 | buf[0] = offset & 0xff; | |
949 | ||
e3d6f909 | 950 | if ((cmd->se_lun->lun_access & TRANSPORT_LUNFLAGS_READ_ONLY) || |
c66ac9db NB |
951 | (cmd->se_deve && |
952 | (cmd->se_deve->lun_flags & TRANSPORT_LUNFLAGS_READ_ONLY))) | |
953 | target_modesense_write_protect(&buf[2], type); | |
954 | ||
e3d6f909 AG |
955 | if ((dev->se_sub_dev->se_dev_attrib.emulate_write_cache > 0) && |
956 | (dev->se_sub_dev->se_dev_attrib.emulate_fua_write > 0)) | |
c66ac9db NB |
957 | target_modesense_dpofua(&buf[2], type); |
958 | ||
959 | if ((offset + 1) > cmd->data_length) | |
960 | offset = cmd->data_length; | |
961 | } | |
05d1c7c0 AG |
962 | |
963 | rbuf = transport_kmap_first_data_page(cmd); | |
c66ac9db | 964 | memcpy(rbuf, buf, offset); |
05d1c7c0 | 965 | transport_kunmap_first_data_page(cmd); |
c66ac9db NB |
966 | |
967 | return 0; | |
968 | } | |
969 | ||
970 | static int | |
971 | target_emulate_request_sense(struct se_cmd *cmd) | |
972 | { | |
a1d8b49a | 973 | unsigned char *cdb = cmd->t_task_cdb; |
05d1c7c0 | 974 | unsigned char *buf; |
c66ac9db | 975 | u8 ua_asc = 0, ua_ascq = 0; |
05d1c7c0 | 976 | int err = 0; |
c66ac9db NB |
977 | |
978 | if (cdb[1] & 0x01) { | |
6708bb27 | 979 | pr_err("REQUEST_SENSE description emulation not" |
c66ac9db NB |
980 | " supported\n"); |
981 | return PYX_TRANSPORT_INVALID_CDB_FIELD; | |
982 | } | |
05d1c7c0 AG |
983 | |
984 | buf = transport_kmap_first_data_page(cmd); | |
985 | ||
6708bb27 | 986 | if (!core_scsi3_ua_clear_for_request_sense(cmd, &ua_asc, &ua_ascq)) { |
c66ac9db NB |
987 | /* |
988 | * CURRENT ERROR, UNIT ATTENTION | |
989 | */ | |
990 | buf[0] = 0x70; | |
991 | buf[SPC_SENSE_KEY_OFFSET] = UNIT_ATTENTION; | |
992 | /* | |
993 | * Make sure request data length is enough for additional | |
994 | * sense data. | |
995 | */ | |
996 | if (cmd->data_length <= 18) { | |
997 | buf[7] = 0x00; | |
05d1c7c0 AG |
998 | err = -EINVAL; |
999 | goto end; | |
c66ac9db NB |
1000 | } |
1001 | /* | |
1002 | * The Additional Sense Code (ASC) from the UNIT ATTENTION | |
1003 | */ | |
1004 | buf[SPC_ASC_KEY_OFFSET] = ua_asc; | |
1005 | buf[SPC_ASCQ_KEY_OFFSET] = ua_ascq; | |
1006 | buf[7] = 0x0A; | |
1007 | } else { | |
1008 | /* | |
1009 | * CURRENT ERROR, NO SENSE | |
1010 | */ | |
1011 | buf[0] = 0x70; | |
1012 | buf[SPC_SENSE_KEY_OFFSET] = NO_SENSE; | |
1013 | /* | |
1014 | * Make sure request data length is enough for additional | |
1015 | * sense data. | |
1016 | */ | |
1017 | if (cmd->data_length <= 18) { | |
1018 | buf[7] = 0x00; | |
05d1c7c0 AG |
1019 | err = -EINVAL; |
1020 | goto end; | |
c66ac9db NB |
1021 | } |
1022 | /* | |
1023 | * NO ADDITIONAL SENSE INFORMATION | |
1024 | */ | |
1025 | buf[SPC_ASC_KEY_OFFSET] = 0x00; | |
1026 | buf[7] = 0x0A; | |
1027 | } | |
1028 | ||
05d1c7c0 AG |
1029 | end: |
1030 | transport_kunmap_first_data_page(cmd); | |
1031 | ||
c66ac9db NB |
1032 | return 0; |
1033 | } | |
1034 | ||
1035 | /* | |
1036 | * Used for TCM/IBLOCK and TCM/FILEIO for block/blk-lib.c level discard support. | |
1037 | * Note this is not used for TCM/pSCSI passthrough | |
1038 | */ | |
1039 | static int | |
1040 | target_emulate_unmap(struct se_task *task) | |
1041 | { | |
e3d6f909 | 1042 | struct se_cmd *cmd = task->task_se_cmd; |
5951146d | 1043 | struct se_device *dev = cmd->se_dev; |
05d1c7c0 | 1044 | unsigned char *buf, *ptr = NULL; |
a1d8b49a | 1045 | unsigned char *cdb = &cmd->t_task_cdb[0]; |
c66ac9db NB |
1046 | sector_t lba; |
1047 | unsigned int size = cmd->data_length, range; | |
05d1c7c0 | 1048 | int ret = 0, offset; |
c66ac9db NB |
1049 | unsigned short dl, bd_dl; |
1050 | ||
1051 | /* First UNMAP block descriptor starts at 8 byte offset */ | |
1052 | offset = 8; | |
1053 | size -= 8; | |
1054 | dl = get_unaligned_be16(&cdb[0]); | |
1055 | bd_dl = get_unaligned_be16(&cdb[2]); | |
05d1c7c0 AG |
1056 | |
1057 | buf = transport_kmap_first_data_page(cmd); | |
1058 | ||
c66ac9db | 1059 | ptr = &buf[offset]; |
6708bb27 | 1060 | pr_debug("UNMAP: Sub: %s Using dl: %hu bd_dl: %hu size: %hu" |
c66ac9db NB |
1061 | " ptr: %p\n", dev->transport->name, dl, bd_dl, size, ptr); |
1062 | ||
1063 | while (size) { | |
1064 | lba = get_unaligned_be64(&ptr[0]); | |
1065 | range = get_unaligned_be32(&ptr[8]); | |
6708bb27 | 1066 | pr_debug("UNMAP: Using lba: %llu and range: %u\n", |
c66ac9db NB |
1067 | (unsigned long long)lba, range); |
1068 | ||
1069 | ret = dev->transport->do_discard(dev, lba, range); | |
1070 | if (ret < 0) { | |
6708bb27 | 1071 | pr_err("blkdev_issue_discard() failed: %d\n", |
c66ac9db | 1072 | ret); |
05d1c7c0 | 1073 | goto err; |
c66ac9db NB |
1074 | } |
1075 | ||
1076 | ptr += 16; | |
1077 | size -= 16; | |
1078 | } | |
1079 | ||
05d1c7c0 AG |
1080 | err: |
1081 | transport_kunmap_first_data_page(cmd); | |
1082 | ||
1083 | return ret; | |
c66ac9db NB |
1084 | } |
1085 | ||
1086 | /* | |
1087 | * Used for TCM/IBLOCK and TCM/FILEIO for block/blk-lib.c level discard support. | |
1088 | * Note this is not used for TCM/pSCSI passthrough | |
1089 | */ | |
1090 | static int | |
706d5860 | 1091 | target_emulate_write_same(struct se_task *task, u32 num_blocks) |
c66ac9db | 1092 | { |
e3d6f909 | 1093 | struct se_cmd *cmd = task->task_se_cmd; |
5951146d | 1094 | struct se_device *dev = cmd->se_dev; |
a1d8b49a AG |
1095 | sector_t range; |
1096 | sector_t lba = cmd->t_task_lba; | |
c66ac9db | 1097 | int ret; |
dd3a5ad8 | 1098 | /* |
706d5860 NB |
1099 | * Use the explicit range when non zero is supplied, otherwise calculate |
1100 | * the remaining range based on ->get_blocks() - starting LBA. | |
dd3a5ad8 | 1101 | */ |
dd3a5ad8 NB |
1102 | if (num_blocks != 0) |
1103 | range = num_blocks; | |
1104 | else | |
1105 | range = (dev->transport->get_blocks(dev) - lba); | |
c66ac9db | 1106 | |
6708bb27 | 1107 | pr_debug("WRITE_SAME UNMAP: LBA: %llu Range: %llu\n", |
dd3a5ad8 | 1108 | (unsigned long long)lba, (unsigned long long)range); |
c66ac9db NB |
1109 | |
1110 | ret = dev->transport->do_discard(dev, lba, range); | |
1111 | if (ret < 0) { | |
6708bb27 | 1112 | pr_debug("blkdev_issue_discard() failed for WRITE_SAME\n"); |
e3d6f909 | 1113 | return ret; |
c66ac9db NB |
1114 | } |
1115 | ||
c66ac9db NB |
1116 | return 0; |
1117 | } | |
1118 | ||
1119 | int | |
1120 | transport_emulate_control_cdb(struct se_task *task) | |
1121 | { | |
e3d6f909 | 1122 | struct se_cmd *cmd = task->task_se_cmd; |
5951146d | 1123 | struct se_device *dev = cmd->se_dev; |
c66ac9db NB |
1124 | unsigned short service_action; |
1125 | int ret = 0; | |
1126 | ||
a1d8b49a | 1127 | switch (cmd->t_task_cdb[0]) { |
c66ac9db NB |
1128 | case INQUIRY: |
1129 | ret = target_emulate_inquiry(cmd); | |
1130 | break; | |
1131 | case READ_CAPACITY: | |
1132 | ret = target_emulate_readcapacity(cmd); | |
1133 | break; | |
1134 | case MODE_SENSE: | |
1135 | ret = target_emulate_modesense(cmd, 0); | |
1136 | break; | |
1137 | case MODE_SENSE_10: | |
1138 | ret = target_emulate_modesense(cmd, 1); | |
1139 | break; | |
1140 | case SERVICE_ACTION_IN: | |
a1d8b49a | 1141 | switch (cmd->t_task_cdb[1] & 0x1f) { |
c66ac9db NB |
1142 | case SAI_READ_CAPACITY_16: |
1143 | ret = target_emulate_readcapacity_16(cmd); | |
1144 | break; | |
1145 | default: | |
6708bb27 | 1146 | pr_err("Unsupported SA: 0x%02x\n", |
a1d8b49a | 1147 | cmd->t_task_cdb[1] & 0x1f); |
c66ac9db NB |
1148 | return PYX_TRANSPORT_UNKNOWN_SAM_OPCODE; |
1149 | } | |
1150 | break; | |
1151 | case REQUEST_SENSE: | |
1152 | ret = target_emulate_request_sense(cmd); | |
1153 | break; | |
1154 | case UNMAP: | |
1155 | if (!dev->transport->do_discard) { | |
6708bb27 | 1156 | pr_err("UNMAP emulation not supported for: %s\n", |
c66ac9db NB |
1157 | dev->transport->name); |
1158 | return PYX_TRANSPORT_UNKNOWN_SAM_OPCODE; | |
1159 | } | |
1160 | ret = target_emulate_unmap(task); | |
1161 | break; | |
706d5860 NB |
1162 | case WRITE_SAME: |
1163 | if (!dev->transport->do_discard) { | |
1164 | pr_err("WRITE_SAME emulation not supported" | |
1165 | " for: %s\n", dev->transport->name); | |
1166 | return PYX_TRANSPORT_UNKNOWN_SAM_OPCODE; | |
1167 | } | |
1168 | ret = target_emulate_write_same(task, | |
1169 | get_unaligned_be16(&cmd->t_task_cdb[7])); | |
1170 | break; | |
c66ac9db NB |
1171 | case WRITE_SAME_16: |
1172 | if (!dev->transport->do_discard) { | |
6708bb27 | 1173 | pr_err("WRITE_SAME_16 emulation not supported" |
c66ac9db NB |
1174 | " for: %s\n", dev->transport->name); |
1175 | return PYX_TRANSPORT_UNKNOWN_SAM_OPCODE; | |
1176 | } | |
706d5860 NB |
1177 | ret = target_emulate_write_same(task, |
1178 | get_unaligned_be32(&cmd->t_task_cdb[10])); | |
c66ac9db NB |
1179 | break; |
1180 | case VARIABLE_LENGTH_CMD: | |
1181 | service_action = | |
a1d8b49a | 1182 | get_unaligned_be16(&cmd->t_task_cdb[8]); |
c66ac9db NB |
1183 | switch (service_action) { |
1184 | case WRITE_SAME_32: | |
1185 | if (!dev->transport->do_discard) { | |
6708bb27 | 1186 | pr_err("WRITE_SAME_32 SA emulation not" |
c66ac9db NB |
1187 | " supported for: %s\n", |
1188 | dev->transport->name); | |
1189 | return PYX_TRANSPORT_UNKNOWN_SAM_OPCODE; | |
1190 | } | |
706d5860 NB |
1191 | ret = target_emulate_write_same(task, |
1192 | get_unaligned_be32(&cmd->t_task_cdb[28])); | |
c66ac9db NB |
1193 | break; |
1194 | default: | |
6708bb27 | 1195 | pr_err("Unsupported VARIABLE_LENGTH_CMD SA:" |
c66ac9db NB |
1196 | " 0x%02x\n", service_action); |
1197 | break; | |
1198 | } | |
1199 | break; | |
1200 | case SYNCHRONIZE_CACHE: | |
1201 | case 0x91: /* SYNCHRONIZE_CACHE_16: */ | |
1202 | if (!dev->transport->do_sync_cache) { | |
6708bb27 | 1203 | pr_err("SYNCHRONIZE_CACHE emulation not supported" |
c66ac9db NB |
1204 | " for: %s\n", dev->transport->name); |
1205 | return PYX_TRANSPORT_UNKNOWN_SAM_OPCODE; | |
1206 | } | |
1207 | dev->transport->do_sync_cache(task); | |
1208 | break; | |
1209 | case ALLOW_MEDIUM_REMOVAL: | |
1210 | case ERASE: | |
1211 | case REZERO_UNIT: | |
1212 | case SEEK_10: | |
1213 | case SPACE: | |
1214 | case START_STOP: | |
1215 | case TEST_UNIT_READY: | |
1216 | case VERIFY: | |
1217 | case WRITE_FILEMARKS: | |
1218 | break; | |
1219 | default: | |
6708bb27 | 1220 | pr_err("Unsupported SCSI Opcode: 0x%02x for %s\n", |
a1d8b49a | 1221 | cmd->t_task_cdb[0], dev->transport->name); |
c66ac9db NB |
1222 | return PYX_TRANSPORT_UNKNOWN_SAM_OPCODE; |
1223 | } | |
1224 | ||
1225 | if (ret < 0) | |
1226 | return ret; | |
72f4ba1e NB |
1227 | /* |
1228 | * Handle the successful completion here unless a caller | |
1229 | * has explictly requested an asychronous completion. | |
1230 | */ | |
1231 | if (!(cmd->se_cmd_flags & SCF_EMULATE_CDB_ASYNC)) { | |
1232 | task->task_scsi_status = GOOD; | |
1233 | transport_complete_task(task, 1); | |
1234 | } | |
c66ac9db NB |
1235 | |
1236 | return PYX_TRANSPORT_SENT_TO_TRANSPORT; | |
1237 | } |