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 | ||
26 | #include <asm/unaligned.h> | |
27 | #include <scsi/scsi.h> | |
28 | ||
29 | #include <target/target_core_base.h> | |
30 | #include <target/target_core_transport.h> | |
31 | #include <target/target_core_fabric_ops.h> | |
32 | #include "target_core_ua.h" | |
33 | ||
34 | static void | |
35 | target_fill_alua_data(struct se_port *port, unsigned char *buf) | |
36 | { | |
37 | struct t10_alua_tg_pt_gp *tg_pt_gp; | |
38 | struct t10_alua_tg_pt_gp_member *tg_pt_gp_mem; | |
39 | ||
40 | /* | |
41 | * Set SCCS for MAINTENANCE_IN + REPORT_TARGET_PORT_GROUPS. | |
42 | */ | |
43 | buf[5] = 0x80; | |
44 | ||
45 | /* | |
46 | * Set TPGS field for explict and/or implict ALUA access type | |
47 | * and opteration. | |
48 | * | |
49 | * See spc4r17 section 6.4.2 Table 135 | |
50 | */ | |
51 | if (!port) | |
52 | return; | |
53 | tg_pt_gp_mem = port->sep_alua_tg_pt_gp_mem; | |
54 | if (!tg_pt_gp_mem) | |
55 | return; | |
56 | ||
57 | spin_lock(&tg_pt_gp_mem->tg_pt_gp_mem_lock); | |
58 | tg_pt_gp = tg_pt_gp_mem->tg_pt_gp; | |
59 | if (tg_pt_gp) | |
60 | buf[5] |= tg_pt_gp->tg_pt_gp_alua_access_type; | |
61 | spin_unlock(&tg_pt_gp_mem->tg_pt_gp_mem_lock); | |
62 | } | |
63 | ||
64 | static int | |
65 | target_emulate_inquiry_std(struct se_cmd *cmd) | |
66 | { | |
e3d6f909 | 67 | struct se_lun *lun = cmd->se_lun; |
5951146d AG |
68 | struct se_device *dev = cmd->se_dev; |
69 | unsigned char *buf = cmd->t_task.t_task_buf; | |
c66ac9db NB |
70 | |
71 | /* | |
72 | * Make sure we at least have 6 bytes of INQUIRY response | |
73 | * payload going back for EVPD=0 | |
74 | */ | |
75 | if (cmd->data_length < 6) { | |
76 | printk(KERN_ERR "SCSI Inquiry payload length: %u" | |
77 | " too small for EVPD=0\n", cmd->data_length); | |
e3d6f909 | 78 | return -EINVAL; |
c66ac9db NB |
79 | } |
80 | ||
81 | buf[0] = dev->transport->get_device_type(dev); | |
82 | if (buf[0] == TYPE_TAPE) | |
83 | buf[1] = 0x80; | |
84 | buf[2] = dev->transport->get_device_rev(dev); | |
85 | ||
86 | /* | |
87 | * Enable SCCS and TPGS fields for Emulated ALUA | |
88 | */ | |
e3d6f909 | 89 | if (dev->se_sub_dev->t10_alua.alua_type == SPC3_ALUA_EMULATED) |
c66ac9db NB |
90 | target_fill_alua_data(lun->lun_sep, buf); |
91 | ||
92 | if (cmd->data_length < 8) { | |
93 | buf[4] = 1; /* Set additional length to 1 */ | |
94 | return 0; | |
95 | } | |
96 | ||
97 | buf[7] = 0x32; /* Sync=1 and CmdQue=1 */ | |
98 | ||
99 | /* | |
100 | * Do not include vendor, product, reversion info in INQUIRY | |
101 | * response payload for cdbs with a small allocation length. | |
102 | */ | |
103 | if (cmd->data_length < 36) { | |
104 | buf[4] = 3; /* Set additional length to 3 */ | |
105 | return 0; | |
106 | } | |
107 | ||
108 | snprintf((unsigned char *)&buf[8], 8, "LIO-ORG"); | |
109 | snprintf((unsigned char *)&buf[16], 16, "%s", | |
e3d6f909 | 110 | &dev->se_sub_dev->t10_wwn.model[0]); |
c66ac9db | 111 | snprintf((unsigned char *)&buf[32], 4, "%s", |
e3d6f909 | 112 | &dev->se_sub_dev->t10_wwn.revision[0]); |
c66ac9db NB |
113 | buf[4] = 31; /* Set additional length to 31 */ |
114 | return 0; | |
115 | } | |
116 | ||
117 | /* supported vital product data pages */ | |
118 | static int | |
119 | target_emulate_evpd_00(struct se_cmd *cmd, unsigned char *buf) | |
120 | { | |
121 | buf[1] = 0x00; | |
122 | if (cmd->data_length < 8) | |
123 | return 0; | |
124 | ||
125 | buf[4] = 0x0; | |
126 | /* | |
127 | * Only report the INQUIRY EVPD=1 pages after a valid NAA | |
128 | * Registered Extended LUN WWN has been set via ConfigFS | |
129 | * during device creation/restart. | |
130 | */ | |
5951146d | 131 | if (cmd->se_dev->se_sub_dev->su_dev_flags & |
c66ac9db NB |
132 | SDF_EMULATED_VPD_UNIT_SERIAL) { |
133 | buf[3] = 3; | |
134 | buf[5] = 0x80; | |
135 | buf[6] = 0x83; | |
136 | buf[7] = 0x86; | |
137 | } | |
138 | ||
139 | return 0; | |
140 | } | |
141 | ||
142 | /* unit serial number */ | |
143 | static int | |
144 | target_emulate_evpd_80(struct se_cmd *cmd, unsigned char *buf) | |
145 | { | |
5951146d | 146 | struct se_device *dev = cmd->se_dev; |
c66ac9db NB |
147 | u16 len = 0; |
148 | ||
149 | buf[1] = 0x80; | |
150 | if (dev->se_sub_dev->su_dev_flags & | |
151 | SDF_EMULATED_VPD_UNIT_SERIAL) { | |
152 | u32 unit_serial_len; | |
153 | ||
154 | unit_serial_len = | |
e3d6f909 | 155 | strlen(&dev->se_sub_dev->t10_wwn.unit_serial[0]); |
c66ac9db NB |
156 | unit_serial_len++; /* For NULL Terminator */ |
157 | ||
158 | if (((len + 4) + unit_serial_len) > cmd->data_length) { | |
159 | len += unit_serial_len; | |
160 | buf[2] = ((len >> 8) & 0xff); | |
161 | buf[3] = (len & 0xff); | |
162 | return 0; | |
163 | } | |
164 | len += sprintf((unsigned char *)&buf[4], "%s", | |
e3d6f909 | 165 | &dev->se_sub_dev->t10_wwn.unit_serial[0]); |
c66ac9db NB |
166 | len++; /* Extra Byte for NULL Terminator */ |
167 | buf[3] = len; | |
168 | } | |
169 | return 0; | |
170 | } | |
171 | ||
172 | /* | |
173 | * Device identification VPD, for a complete list of | |
174 | * DESIGNATOR TYPEs see spc4r17 Table 459. | |
175 | */ | |
176 | static int | |
177 | target_emulate_evpd_83(struct se_cmd *cmd, unsigned char *buf) | |
178 | { | |
5951146d | 179 | struct se_device *dev = cmd->se_dev; |
e3d6f909 | 180 | struct se_lun *lun = cmd->se_lun; |
c66ac9db NB |
181 | struct se_port *port = NULL; |
182 | struct se_portal_group *tpg = NULL; | |
183 | struct t10_alua_lu_gp_member *lu_gp_mem; | |
184 | struct t10_alua_tg_pt_gp *tg_pt_gp; | |
185 | struct t10_alua_tg_pt_gp_member *tg_pt_gp_mem; | |
186 | unsigned char binary, binary_new; | |
e3d6f909 | 187 | unsigned char *prod = &dev->se_sub_dev->t10_wwn.model[0]; |
c66ac9db NB |
188 | u32 prod_len; |
189 | u32 unit_serial_len, off = 0; | |
190 | int i; | |
191 | u16 len = 0, id_len; | |
192 | ||
193 | buf[1] = 0x83; | |
194 | off = 4; | |
195 | ||
196 | /* | |
197 | * NAA IEEE Registered Extended Assigned designator format, see | |
198 | * spc4r17 section 7.7.3.6.5 | |
199 | * | |
200 | * We depend upon a target_core_mod/ConfigFS provided | |
201 | * /sys/kernel/config/target/core/$HBA/$DEV/wwn/vpd_unit_serial | |
202 | * value in order to return the NAA id. | |
203 | */ | |
204 | if (!(dev->se_sub_dev->su_dev_flags & SDF_EMULATED_VPD_UNIT_SERIAL)) | |
205 | goto check_t10_vend_desc; | |
206 | ||
207 | if (off + 20 > cmd->data_length) | |
208 | goto check_t10_vend_desc; | |
209 | ||
210 | /* CODE SET == Binary */ | |
211 | buf[off++] = 0x1; | |
212 | ||
213 | /* Set ASSOICATION == addressed logical unit: 0)b */ | |
214 | buf[off] = 0x00; | |
215 | ||
216 | /* Identifier/Designator type == NAA identifier */ | |
217 | buf[off++] = 0x3; | |
218 | off++; | |
219 | ||
220 | /* Identifier/Designator length */ | |
221 | buf[off++] = 0x10; | |
222 | ||
223 | /* | |
224 | * Start NAA IEEE Registered Extended Identifier/Designator | |
225 | */ | |
226 | buf[off++] = (0x6 << 4); | |
227 | ||
228 | /* | |
229 | * Use OpenFabrics IEEE Company ID: 00 14 05 | |
230 | */ | |
231 | buf[off++] = 0x01; | |
232 | buf[off++] = 0x40; | |
233 | buf[off] = (0x5 << 4); | |
234 | ||
235 | /* | |
236 | * Return ConfigFS Unit Serial Number information for | |
237 | * VENDOR_SPECIFIC_IDENTIFIER and | |
238 | * VENDOR_SPECIFIC_IDENTIFIER_EXTENTION | |
239 | */ | |
240 | binary = transport_asciihex_to_binaryhex( | |
e3d6f909 | 241 | &dev->se_sub_dev->t10_wwn.unit_serial[0]); |
c66ac9db NB |
242 | buf[off++] |= (binary & 0xf0) >> 4; |
243 | for (i = 0; i < 24; i += 2) { | |
244 | binary_new = transport_asciihex_to_binaryhex( | |
e3d6f909 | 245 | &dev->se_sub_dev->t10_wwn.unit_serial[i+2]); |
c66ac9db NB |
246 | buf[off] = (binary & 0x0f) << 4; |
247 | buf[off++] |= (binary_new & 0xf0) >> 4; | |
248 | binary = binary_new; | |
249 | } | |
250 | len = 20; | |
251 | off = (len + 4); | |
252 | ||
253 | check_t10_vend_desc: | |
254 | /* | |
255 | * T10 Vendor Identifier Page, see spc4r17 section 7.7.3.4 | |
256 | */ | |
257 | id_len = 8; /* For Vendor field */ | |
258 | prod_len = 4; /* For VPD Header */ | |
259 | prod_len += 8; /* For Vendor field */ | |
260 | prod_len += strlen(prod); | |
261 | prod_len++; /* For : */ | |
262 | ||
263 | if (dev->se_sub_dev->su_dev_flags & | |
264 | SDF_EMULATED_VPD_UNIT_SERIAL) { | |
265 | unit_serial_len = | |
e3d6f909 | 266 | strlen(&dev->se_sub_dev->t10_wwn.unit_serial[0]); |
c66ac9db NB |
267 | unit_serial_len++; /* For NULL Terminator */ |
268 | ||
269 | if ((len + (id_len + 4) + | |
270 | (prod_len + unit_serial_len)) > | |
271 | cmd->data_length) { | |
272 | len += (prod_len + unit_serial_len); | |
273 | goto check_port; | |
274 | } | |
275 | id_len += sprintf((unsigned char *)&buf[off+12], | |
276 | "%s:%s", prod, | |
e3d6f909 | 277 | &dev->se_sub_dev->t10_wwn.unit_serial[0]); |
c66ac9db NB |
278 | } |
279 | buf[off] = 0x2; /* ASCII */ | |
280 | buf[off+1] = 0x1; /* T10 Vendor ID */ | |
281 | buf[off+2] = 0x0; | |
282 | memcpy((unsigned char *)&buf[off+4], "LIO-ORG", 8); | |
283 | /* Extra Byte for NULL Terminator */ | |
284 | id_len++; | |
285 | /* Identifier Length */ | |
286 | buf[off+3] = id_len; | |
287 | /* Header size for Designation descriptor */ | |
288 | len += (id_len + 4); | |
289 | off += (id_len + 4); | |
290 | /* | |
291 | * struct se_port is only set for INQUIRY VPD=1 through $FABRIC_MOD | |
292 | */ | |
293 | check_port: | |
294 | port = lun->lun_sep; | |
295 | if (port) { | |
296 | struct t10_alua_lu_gp *lu_gp; | |
297 | u32 padding, scsi_name_len; | |
298 | u16 lu_gp_id = 0; | |
299 | u16 tg_pt_gp_id = 0; | |
300 | u16 tpgt; | |
301 | ||
302 | tpg = port->sep_tpg; | |
303 | /* | |
304 | * Relative target port identifer, see spc4r17 | |
305 | * section 7.7.3.7 | |
306 | * | |
307 | * Get the PROTOCOL IDENTIFIER as defined by spc4r17 | |
308 | * section 7.5.1 Table 362 | |
309 | */ | |
310 | if (((len + 4) + 8) > cmd->data_length) { | |
311 | len += 8; | |
312 | goto check_tpgi; | |
313 | } | |
314 | buf[off] = | |
e3d6f909 | 315 | (tpg->se_tpg_tfo->get_fabric_proto_ident(tpg) << 4); |
c66ac9db NB |
316 | buf[off++] |= 0x1; /* CODE SET == Binary */ |
317 | buf[off] = 0x80; /* Set PIV=1 */ | |
318 | /* Set ASSOICATION == target port: 01b */ | |
319 | buf[off] |= 0x10; | |
320 | /* DESIGNATOR TYPE == Relative target port identifer */ | |
321 | buf[off++] |= 0x4; | |
322 | off++; /* Skip over Reserved */ | |
323 | buf[off++] = 4; /* DESIGNATOR LENGTH */ | |
324 | /* Skip over Obsolete field in RTPI payload | |
325 | * in Table 472 */ | |
326 | off += 2; | |
327 | buf[off++] = ((port->sep_rtpi >> 8) & 0xff); | |
328 | buf[off++] = (port->sep_rtpi & 0xff); | |
329 | len += 8; /* Header size + Designation descriptor */ | |
330 | /* | |
331 | * Target port group identifier, see spc4r17 | |
332 | * section 7.7.3.8 | |
333 | * | |
334 | * Get the PROTOCOL IDENTIFIER as defined by spc4r17 | |
335 | * section 7.5.1 Table 362 | |
336 | */ | |
337 | check_tpgi: | |
e3d6f909 | 338 | if (dev->se_sub_dev->t10_alua.alua_type != |
c66ac9db NB |
339 | SPC3_ALUA_EMULATED) |
340 | goto check_scsi_name; | |
341 | ||
342 | if (((len + 4) + 8) > cmd->data_length) { | |
343 | len += 8; | |
344 | goto check_lu_gp; | |
345 | } | |
346 | tg_pt_gp_mem = port->sep_alua_tg_pt_gp_mem; | |
347 | if (!tg_pt_gp_mem) | |
348 | goto check_lu_gp; | |
349 | ||
350 | spin_lock(&tg_pt_gp_mem->tg_pt_gp_mem_lock); | |
351 | tg_pt_gp = tg_pt_gp_mem->tg_pt_gp; | |
352 | if (!(tg_pt_gp)) { | |
353 | spin_unlock(&tg_pt_gp_mem->tg_pt_gp_mem_lock); | |
354 | goto check_lu_gp; | |
355 | } | |
356 | tg_pt_gp_id = tg_pt_gp->tg_pt_gp_id; | |
357 | spin_unlock(&tg_pt_gp_mem->tg_pt_gp_mem_lock); | |
358 | ||
359 | buf[off] = | |
e3d6f909 | 360 | (tpg->se_tpg_tfo->get_fabric_proto_ident(tpg) << 4); |
c66ac9db NB |
361 | buf[off++] |= 0x1; /* CODE SET == Binary */ |
362 | buf[off] = 0x80; /* Set PIV=1 */ | |
363 | /* Set ASSOICATION == target port: 01b */ | |
364 | buf[off] |= 0x10; | |
365 | /* DESIGNATOR TYPE == Target port group identifier */ | |
366 | buf[off++] |= 0x5; | |
367 | off++; /* Skip over Reserved */ | |
368 | buf[off++] = 4; /* DESIGNATOR LENGTH */ | |
369 | off += 2; /* Skip over Reserved Field */ | |
370 | buf[off++] = ((tg_pt_gp_id >> 8) & 0xff); | |
371 | buf[off++] = (tg_pt_gp_id & 0xff); | |
372 | len += 8; /* Header size + Designation descriptor */ | |
373 | /* | |
374 | * Logical Unit Group identifier, see spc4r17 | |
375 | * section 7.7.3.8 | |
376 | */ | |
377 | check_lu_gp: | |
378 | if (((len + 4) + 8) > cmd->data_length) { | |
379 | len += 8; | |
380 | goto check_scsi_name; | |
381 | } | |
382 | lu_gp_mem = dev->dev_alua_lu_gp_mem; | |
383 | if (!(lu_gp_mem)) | |
384 | goto check_scsi_name; | |
385 | ||
386 | spin_lock(&lu_gp_mem->lu_gp_mem_lock); | |
387 | lu_gp = lu_gp_mem->lu_gp; | |
388 | if (!(lu_gp)) { | |
389 | spin_unlock(&lu_gp_mem->lu_gp_mem_lock); | |
390 | goto check_scsi_name; | |
391 | } | |
392 | lu_gp_id = lu_gp->lu_gp_id; | |
393 | spin_unlock(&lu_gp_mem->lu_gp_mem_lock); | |
394 | ||
395 | buf[off++] |= 0x1; /* CODE SET == Binary */ | |
396 | /* DESIGNATOR TYPE == Logical Unit Group identifier */ | |
397 | buf[off++] |= 0x6; | |
398 | off++; /* Skip over Reserved */ | |
399 | buf[off++] = 4; /* DESIGNATOR LENGTH */ | |
400 | off += 2; /* Skip over Reserved Field */ | |
401 | buf[off++] = ((lu_gp_id >> 8) & 0xff); | |
402 | buf[off++] = (lu_gp_id & 0xff); | |
403 | len += 8; /* Header size + Designation descriptor */ | |
404 | /* | |
405 | * SCSI name string designator, see spc4r17 | |
406 | * section 7.7.3.11 | |
407 | * | |
408 | * Get the PROTOCOL IDENTIFIER as defined by spc4r17 | |
409 | * section 7.5.1 Table 362 | |
410 | */ | |
411 | check_scsi_name: | |
e3d6f909 | 412 | scsi_name_len = strlen(tpg->se_tpg_tfo->tpg_get_wwn(tpg)); |
c66ac9db NB |
413 | /* UTF-8 ",t,0x<16-bit TPGT>" + NULL Terminator */ |
414 | scsi_name_len += 10; | |
415 | /* Check for 4-byte padding */ | |
416 | padding = ((-scsi_name_len) & 3); | |
417 | if (padding != 0) | |
418 | scsi_name_len += padding; | |
419 | /* Header size + Designation descriptor */ | |
420 | scsi_name_len += 4; | |
421 | ||
422 | if (((len + 4) + scsi_name_len) > cmd->data_length) { | |
423 | len += scsi_name_len; | |
424 | goto set_len; | |
425 | } | |
426 | buf[off] = | |
e3d6f909 | 427 | (tpg->se_tpg_tfo->get_fabric_proto_ident(tpg) << 4); |
c66ac9db NB |
428 | buf[off++] |= 0x3; /* CODE SET == UTF-8 */ |
429 | buf[off] = 0x80; /* Set PIV=1 */ | |
430 | /* Set ASSOICATION == target port: 01b */ | |
431 | buf[off] |= 0x10; | |
432 | /* DESIGNATOR TYPE == SCSI name string */ | |
433 | buf[off++] |= 0x8; | |
434 | off += 2; /* Skip over Reserved and length */ | |
435 | /* | |
436 | * SCSI name string identifer containing, $FABRIC_MOD | |
437 | * dependent information. For LIO-Target and iSCSI | |
438 | * Target Port, this means "<iSCSI name>,t,0x<TPGT> in | |
439 | * UTF-8 encoding. | |
440 | */ | |
e3d6f909 | 441 | tpgt = tpg->se_tpg_tfo->tpg_get_tag(tpg); |
c66ac9db | 442 | scsi_name_len = sprintf(&buf[off], "%s,t,0x%04x", |
e3d6f909 | 443 | tpg->se_tpg_tfo->tpg_get_wwn(tpg), tpgt); |
c66ac9db NB |
444 | scsi_name_len += 1 /* Include NULL terminator */; |
445 | /* | |
446 | * The null-terminated, null-padded (see 4.4.2) SCSI | |
447 | * NAME STRING field contains a UTF-8 format string. | |
448 | * The number of bytes in the SCSI NAME STRING field | |
449 | * (i.e., the value in the DESIGNATOR LENGTH field) | |
450 | * shall be no larger than 256 and shall be a multiple | |
451 | * of four. | |
452 | */ | |
453 | if (padding) | |
454 | scsi_name_len += padding; | |
455 | ||
456 | buf[off-1] = scsi_name_len; | |
457 | off += scsi_name_len; | |
458 | /* Header size + Designation descriptor */ | |
459 | len += (scsi_name_len + 4); | |
460 | } | |
461 | set_len: | |
462 | buf[2] = ((len >> 8) & 0xff); | |
463 | buf[3] = (len & 0xff); /* Page Length for VPD 0x83 */ | |
464 | return 0; | |
465 | } | |
466 | ||
467 | /* Extended INQUIRY Data VPD Page */ | |
468 | static int | |
469 | target_emulate_evpd_86(struct se_cmd *cmd, unsigned char *buf) | |
470 | { | |
471 | if (cmd->data_length < 60) | |
472 | return 0; | |
473 | ||
474 | buf[1] = 0x86; | |
475 | buf[2] = 0x3c; | |
476 | /* Set HEADSUP, ORDSUP, SIMPSUP */ | |
477 | buf[5] = 0x07; | |
478 | ||
479 | /* If WriteCache emulation is enabled, set V_SUP */ | |
5951146d | 480 | if (cmd->se_dev->se_sub_dev->se_dev_attrib.emulate_write_cache > 0) |
c66ac9db NB |
481 | buf[6] = 0x01; |
482 | return 0; | |
483 | } | |
484 | ||
485 | /* Block Limits VPD page */ | |
486 | static int | |
487 | target_emulate_evpd_b0(struct se_cmd *cmd, unsigned char *buf) | |
488 | { | |
5951146d | 489 | struct se_device *dev = cmd->se_dev; |
c66ac9db NB |
490 | int have_tp = 0; |
491 | ||
492 | /* | |
493 | * Following sbc3r22 section 6.5.3 Block Limits VPD page, when | |
494 | * emulate_tpu=1 or emulate_tpws=1 we will be expect a | |
495 | * different page length for Thin Provisioning. | |
496 | */ | |
e3d6f909 | 497 | if (dev->se_sub_dev->se_dev_attrib.emulate_tpu || dev->se_sub_dev->se_dev_attrib.emulate_tpws) |
c66ac9db NB |
498 | have_tp = 1; |
499 | ||
500 | if (cmd->data_length < (0x10 + 4)) { | |
501 | printk(KERN_INFO "Received data_length: %u" | |
502 | " too small for EVPD 0xb0\n", | |
503 | cmd->data_length); | |
e3d6f909 | 504 | return -EINVAL; |
c66ac9db NB |
505 | } |
506 | ||
507 | if (have_tp && cmd->data_length < (0x3c + 4)) { | |
508 | printk(KERN_INFO "Received data_length: %u" | |
509 | " too small for TPE=1 EVPD 0xb0\n", | |
510 | cmd->data_length); | |
511 | have_tp = 0; | |
512 | } | |
513 | ||
514 | buf[0] = dev->transport->get_device_type(dev); | |
515 | buf[1] = 0xb0; | |
516 | buf[3] = have_tp ? 0x3c : 0x10; | |
517 | ||
518 | /* | |
519 | * Set OPTIMAL TRANSFER LENGTH GRANULARITY | |
520 | */ | |
521 | put_unaligned_be16(1, &buf[6]); | |
522 | ||
523 | /* | |
524 | * Set MAXIMUM TRANSFER LENGTH | |
525 | */ | |
e3d6f909 | 526 | put_unaligned_be32(dev->se_sub_dev->se_dev_attrib.max_sectors, &buf[8]); |
c66ac9db NB |
527 | |
528 | /* | |
529 | * Set OPTIMAL TRANSFER LENGTH | |
530 | */ | |
e3d6f909 | 531 | put_unaligned_be32(dev->se_sub_dev->se_dev_attrib.optimal_sectors, &buf[12]); |
c66ac9db NB |
532 | |
533 | /* | |
534 | * Exit now if we don't support TP or the initiator sent a too | |
535 | * short buffer. | |
536 | */ | |
537 | if (!have_tp || cmd->data_length < (0x3c + 4)) | |
538 | return 0; | |
539 | ||
540 | /* | |
541 | * Set MAXIMUM UNMAP LBA COUNT | |
542 | */ | |
e3d6f909 | 543 | put_unaligned_be32(dev->se_sub_dev->se_dev_attrib.max_unmap_lba_count, &buf[20]); |
c66ac9db NB |
544 | |
545 | /* | |
546 | * Set MAXIMUM UNMAP BLOCK DESCRIPTOR COUNT | |
547 | */ | |
e3d6f909 | 548 | put_unaligned_be32(dev->se_sub_dev->se_dev_attrib.max_unmap_block_desc_count, |
c66ac9db NB |
549 | &buf[24]); |
550 | ||
551 | /* | |
552 | * Set OPTIMAL UNMAP GRANULARITY | |
553 | */ | |
e3d6f909 | 554 | put_unaligned_be32(dev->se_sub_dev->se_dev_attrib.unmap_granularity, &buf[28]); |
c66ac9db NB |
555 | |
556 | /* | |
557 | * UNMAP GRANULARITY ALIGNMENT | |
558 | */ | |
e3d6f909 | 559 | put_unaligned_be32(dev->se_sub_dev->se_dev_attrib.unmap_granularity_alignment, |
c66ac9db | 560 | &buf[32]); |
e3d6f909 | 561 | if (dev->se_sub_dev->se_dev_attrib.unmap_granularity_alignment != 0) |
c66ac9db NB |
562 | buf[32] |= 0x80; /* Set the UGAVALID bit */ |
563 | ||
564 | return 0; | |
565 | } | |
566 | ||
567 | /* Thin Provisioning VPD */ | |
568 | static int | |
569 | target_emulate_evpd_b2(struct se_cmd *cmd, unsigned char *buf) | |
570 | { | |
5951146d | 571 | struct se_device *dev = cmd->se_dev; |
c66ac9db NB |
572 | |
573 | /* | |
574 | * From sbc3r22 section 6.5.4 Thin Provisioning VPD page: | |
575 | * | |
576 | * The PAGE LENGTH field is defined in SPC-4. If the DP bit is set to | |
577 | * zero, then the page length shall be set to 0004h. If the DP bit | |
578 | * is set to one, then the page length shall be set to the value | |
579 | * defined in table 162. | |
580 | */ | |
581 | buf[0] = dev->transport->get_device_type(dev); | |
582 | buf[1] = 0xb2; | |
583 | ||
584 | /* | |
585 | * Set Hardcoded length mentioned above for DP=0 | |
586 | */ | |
587 | put_unaligned_be16(0x0004, &buf[2]); | |
588 | ||
589 | /* | |
590 | * The THRESHOLD EXPONENT field indicates the threshold set size in | |
591 | * LBAs as a power of 2 (i.e., the threshold set size is equal to | |
592 | * 2(threshold exponent)). | |
593 | * | |
594 | * Note that this is currently set to 0x00 as mkp says it will be | |
595 | * changing again. We can enable this once it has settled in T10 | |
596 | * and is actually used by Linux/SCSI ML code. | |
597 | */ | |
598 | buf[4] = 0x00; | |
599 | ||
600 | /* | |
601 | * A TPU bit set to one indicates that the device server supports | |
602 | * the UNMAP command (see 5.25). A TPU bit set to zero indicates | |
603 | * that the device server does not support the UNMAP command. | |
604 | */ | |
e3d6f909 | 605 | if (dev->se_sub_dev->se_dev_attrib.emulate_tpu != 0) |
c66ac9db NB |
606 | buf[5] = 0x80; |
607 | ||
608 | /* | |
609 | * A TPWS bit set to one indicates that the device server supports | |
610 | * the use of the WRITE SAME (16) command (see 5.42) to unmap LBAs. | |
611 | * A TPWS bit set to zero indicates that the device server does not | |
612 | * support the use of the WRITE SAME (16) command to unmap LBAs. | |
613 | */ | |
e3d6f909 | 614 | if (dev->se_sub_dev->se_dev_attrib.emulate_tpws != 0) |
c66ac9db NB |
615 | buf[5] |= 0x40; |
616 | ||
617 | return 0; | |
618 | } | |
619 | ||
620 | static int | |
621 | target_emulate_inquiry(struct se_cmd *cmd) | |
622 | { | |
5951146d AG |
623 | struct se_device *dev = cmd->se_dev; |
624 | unsigned char *buf = cmd->t_task.t_task_buf; | |
625 | unsigned char *cdb = cmd->t_task.t_task_cdb; | |
c66ac9db NB |
626 | |
627 | if (!(cdb[1] & 0x1)) | |
628 | return target_emulate_inquiry_std(cmd); | |
629 | ||
630 | /* | |
631 | * Make sure we at least have 4 bytes of INQUIRY response | |
632 | * payload for 0x00 going back for EVPD=1. Note that 0x80 | |
633 | * and 0x83 will check for enough payload data length and | |
634 | * jump to set_len: label when there is not enough inquiry EVPD | |
635 | * payload length left for the next outgoing EVPD metadata | |
636 | */ | |
637 | if (cmd->data_length < 4) { | |
638 | printk(KERN_ERR "SCSI Inquiry payload length: %u" | |
639 | " too small for EVPD=1\n", cmd->data_length); | |
e3d6f909 | 640 | return -EINVAL; |
c66ac9db NB |
641 | } |
642 | buf[0] = dev->transport->get_device_type(dev); | |
643 | ||
644 | switch (cdb[2]) { | |
645 | case 0x00: | |
646 | return target_emulate_evpd_00(cmd, buf); | |
647 | case 0x80: | |
648 | return target_emulate_evpd_80(cmd, buf); | |
649 | case 0x83: | |
650 | return target_emulate_evpd_83(cmd, buf); | |
651 | case 0x86: | |
652 | return target_emulate_evpd_86(cmd, buf); | |
653 | case 0xb0: | |
654 | return target_emulate_evpd_b0(cmd, buf); | |
655 | case 0xb2: | |
656 | return target_emulate_evpd_b2(cmd, buf); | |
657 | default: | |
658 | printk(KERN_ERR "Unknown VPD Code: 0x%02x\n", cdb[2]); | |
e3d6f909 | 659 | return -EINVAL; |
c66ac9db NB |
660 | } |
661 | ||
662 | return 0; | |
663 | } | |
664 | ||
665 | static int | |
666 | target_emulate_readcapacity(struct se_cmd *cmd) | |
667 | { | |
5951146d AG |
668 | struct se_device *dev = cmd->se_dev; |
669 | unsigned char *buf = cmd->t_task.t_task_buf; | |
904f0bc4 NB |
670 | unsigned long long blocks_long = dev->transport->get_blocks(dev); |
671 | u32 blocks; | |
672 | ||
673 | if (blocks_long >= 0x00000000ffffffff) | |
674 | blocks = 0xffffffff; | |
675 | else | |
676 | blocks = (u32)blocks_long; | |
c66ac9db NB |
677 | |
678 | buf[0] = (blocks >> 24) & 0xff; | |
679 | buf[1] = (blocks >> 16) & 0xff; | |
680 | buf[2] = (blocks >> 8) & 0xff; | |
681 | buf[3] = blocks & 0xff; | |
e3d6f909 AG |
682 | buf[4] = (dev->se_sub_dev->se_dev_attrib.block_size >> 24) & 0xff; |
683 | buf[5] = (dev->se_sub_dev->se_dev_attrib.block_size >> 16) & 0xff; | |
684 | buf[6] = (dev->se_sub_dev->se_dev_attrib.block_size >> 8) & 0xff; | |
685 | buf[7] = dev->se_sub_dev->se_dev_attrib.block_size & 0xff; | |
c66ac9db NB |
686 | /* |
687 | * Set max 32-bit blocks to signal SERVICE ACTION READ_CAPACITY_16 | |
688 | */ | |
e3d6f909 | 689 | if (dev->se_sub_dev->se_dev_attrib.emulate_tpu || dev->se_sub_dev->se_dev_attrib.emulate_tpws) |
c66ac9db NB |
690 | put_unaligned_be32(0xFFFFFFFF, &buf[0]); |
691 | ||
692 | return 0; | |
693 | } | |
694 | ||
695 | static int | |
696 | target_emulate_readcapacity_16(struct se_cmd *cmd) | |
697 | { | |
5951146d AG |
698 | struct se_device *dev = cmd->se_dev; |
699 | unsigned char *buf = cmd->t_task.t_task_buf; | |
c66ac9db NB |
700 | unsigned long long blocks = dev->transport->get_blocks(dev); |
701 | ||
702 | buf[0] = (blocks >> 56) & 0xff; | |
703 | buf[1] = (blocks >> 48) & 0xff; | |
704 | buf[2] = (blocks >> 40) & 0xff; | |
705 | buf[3] = (blocks >> 32) & 0xff; | |
706 | buf[4] = (blocks >> 24) & 0xff; | |
707 | buf[5] = (blocks >> 16) & 0xff; | |
708 | buf[6] = (blocks >> 8) & 0xff; | |
709 | buf[7] = blocks & 0xff; | |
e3d6f909 AG |
710 | buf[8] = (dev->se_sub_dev->se_dev_attrib.block_size >> 24) & 0xff; |
711 | buf[9] = (dev->se_sub_dev->se_dev_attrib.block_size >> 16) & 0xff; | |
712 | buf[10] = (dev->se_sub_dev->se_dev_attrib.block_size >> 8) & 0xff; | |
713 | buf[11] = dev->se_sub_dev->se_dev_attrib.block_size & 0xff; | |
c66ac9db NB |
714 | /* |
715 | * Set Thin Provisioning Enable bit following sbc3r22 in section | |
716 | * READ CAPACITY (16) byte 14 if emulate_tpu or emulate_tpws is enabled. | |
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 | buf[14] = 0x80; |
720 | ||
721 | return 0; | |
722 | } | |
723 | ||
724 | static int | |
725 | target_modesense_rwrecovery(unsigned char *p) | |
726 | { | |
727 | p[0] = 0x01; | |
728 | p[1] = 0x0a; | |
729 | ||
730 | return 12; | |
731 | } | |
732 | ||
733 | static int | |
734 | target_modesense_control(struct se_device *dev, unsigned char *p) | |
735 | { | |
736 | p[0] = 0x0a; | |
737 | p[1] = 0x0a; | |
738 | p[2] = 2; | |
739 | /* | |
740 | * From spc4r17, section 7.4.6 Control mode Page | |
741 | * | |
742 | * Unit Attention interlocks control (UN_INTLCK_CTRL) to code 00b | |
743 | * | |
744 | * 00b: The logical unit shall clear any unit attention condition | |
745 | * reported in the same I_T_L_Q nexus transaction as a CHECK CONDITION | |
746 | * status and shall not establish a unit attention condition when a com- | |
747 | * mand is completed with BUSY, TASK SET FULL, or RESERVATION CONFLICT | |
748 | * status. | |
749 | * | |
750 | * 10b: The logical unit shall not clear any unit attention condition | |
751 | * reported in the same I_T_L_Q nexus transaction as a CHECK CONDITION | |
752 | * status and shall not establish a unit attention condition when | |
753 | * a command is completed with BUSY, TASK SET FULL, or RESERVATION | |
754 | * CONFLICT status. | |
755 | * | |
756 | * 11b a The logical unit shall not clear any unit attention condition | |
757 | * reported in the same I_T_L_Q nexus transaction as a CHECK CONDITION | |
758 | * status and shall establish a unit attention condition for the | |
759 | * initiator port associated with the I_T nexus on which the BUSY, | |
760 | * TASK SET FULL, or RESERVATION CONFLICT status is being returned. | |
761 | * Depending on the status, the additional sense code shall be set to | |
762 | * PREVIOUS BUSY STATUS, PREVIOUS TASK SET FULL STATUS, or PREVIOUS | |
763 | * RESERVATION CONFLICT STATUS. Until it is cleared by a REQUEST SENSE | |
764 | * command, a unit attention condition shall be established only once | |
765 | * for a BUSY, TASK SET FULL, or RESERVATION CONFLICT status regardless | |
766 | * to the number of commands completed with one of those status codes. | |
767 | */ | |
e3d6f909 AG |
768 | p[4] = (dev->se_sub_dev->se_dev_attrib.emulate_ua_intlck_ctrl == 2) ? 0x30 : |
769 | (dev->se_sub_dev->se_dev_attrib.emulate_ua_intlck_ctrl == 1) ? 0x20 : 0x00; | |
c66ac9db NB |
770 | /* |
771 | * From spc4r17, section 7.4.6 Control mode Page | |
772 | * | |
773 | * Task Aborted Status (TAS) bit set to zero. | |
774 | * | |
775 | * A task aborted status (TAS) bit set to zero specifies that aborted | |
776 | * tasks shall be terminated by the device server without any response | |
777 | * to the application client. A TAS bit set to one specifies that tasks | |
778 | * aborted by the actions of an I_T nexus other than the I_T nexus on | |
779 | * which the command was received shall be completed with TASK ABORTED | |
780 | * status (see SAM-4). | |
781 | */ | |
e3d6f909 | 782 | p[5] = (dev->se_sub_dev->se_dev_attrib.emulate_tas) ? 0x40 : 0x00; |
c66ac9db NB |
783 | p[8] = 0xff; |
784 | p[9] = 0xff; | |
785 | p[11] = 30; | |
786 | ||
787 | return 12; | |
788 | } | |
789 | ||
790 | static int | |
791 | target_modesense_caching(struct se_device *dev, unsigned char *p) | |
792 | { | |
793 | p[0] = 0x08; | |
794 | p[1] = 0x12; | |
e3d6f909 | 795 | if (dev->se_sub_dev->se_dev_attrib.emulate_write_cache > 0) |
c66ac9db NB |
796 | p[2] = 0x04; /* Write Cache Enable */ |
797 | p[12] = 0x20; /* Disabled Read Ahead */ | |
798 | ||
799 | return 20; | |
800 | } | |
801 | ||
802 | static void | |
803 | target_modesense_write_protect(unsigned char *buf, int type) | |
804 | { | |
805 | /* | |
806 | * I believe that the WP bit (bit 7) in the mode header is the same for | |
807 | * all device types.. | |
808 | */ | |
809 | switch (type) { | |
810 | case TYPE_DISK: | |
811 | case TYPE_TAPE: | |
812 | default: | |
813 | buf[0] |= 0x80; /* WP bit */ | |
814 | break; | |
815 | } | |
816 | } | |
817 | ||
818 | static void | |
819 | target_modesense_dpofua(unsigned char *buf, int type) | |
820 | { | |
821 | switch (type) { | |
822 | case TYPE_DISK: | |
823 | buf[0] |= 0x10; /* DPOFUA bit */ | |
824 | break; | |
825 | default: | |
826 | break; | |
827 | } | |
828 | } | |
829 | ||
830 | static int | |
831 | target_emulate_modesense(struct se_cmd *cmd, int ten) | |
832 | { | |
5951146d AG |
833 | struct se_device *dev = cmd->se_dev; |
834 | char *cdb = cmd->t_task.t_task_cdb; | |
835 | unsigned char *rbuf = cmd->t_task.t_task_buf; | |
c66ac9db NB |
836 | int type = dev->transport->get_device_type(dev); |
837 | int offset = (ten) ? 8 : 4; | |
838 | int length = 0; | |
839 | unsigned char buf[SE_MODE_PAGE_BUF]; | |
840 | ||
841 | memset(buf, 0, SE_MODE_PAGE_BUF); | |
842 | ||
843 | switch (cdb[2] & 0x3f) { | |
844 | case 0x01: | |
845 | length = target_modesense_rwrecovery(&buf[offset]); | |
846 | break; | |
847 | case 0x08: | |
848 | length = target_modesense_caching(dev, &buf[offset]); | |
849 | break; | |
850 | case 0x0a: | |
851 | length = target_modesense_control(dev, &buf[offset]); | |
852 | break; | |
853 | case 0x3f: | |
854 | length = target_modesense_rwrecovery(&buf[offset]); | |
855 | length += target_modesense_caching(dev, &buf[offset+length]); | |
856 | length += target_modesense_control(dev, &buf[offset+length]); | |
857 | break; | |
858 | default: | |
859 | printk(KERN_ERR "Got Unknown Mode Page: 0x%02x\n", | |
860 | cdb[2] & 0x3f); | |
861 | return PYX_TRANSPORT_UNKNOWN_MODE_PAGE; | |
862 | } | |
863 | offset += length; | |
864 | ||
865 | if (ten) { | |
866 | offset -= 2; | |
867 | buf[0] = (offset >> 8) & 0xff; | |
868 | buf[1] = offset & 0xff; | |
869 | ||
e3d6f909 | 870 | if ((cmd->se_lun->lun_access & TRANSPORT_LUNFLAGS_READ_ONLY) || |
c66ac9db NB |
871 | (cmd->se_deve && |
872 | (cmd->se_deve->lun_flags & TRANSPORT_LUNFLAGS_READ_ONLY))) | |
873 | target_modesense_write_protect(&buf[3], type); | |
874 | ||
e3d6f909 AG |
875 | if ((dev->se_sub_dev->se_dev_attrib.emulate_write_cache > 0) && |
876 | (dev->se_sub_dev->se_dev_attrib.emulate_fua_write > 0)) | |
c66ac9db NB |
877 | target_modesense_dpofua(&buf[3], type); |
878 | ||
879 | if ((offset + 2) > cmd->data_length) | |
880 | offset = cmd->data_length; | |
881 | ||
882 | } else { | |
883 | offset -= 1; | |
884 | buf[0] = offset & 0xff; | |
885 | ||
e3d6f909 | 886 | if ((cmd->se_lun->lun_access & TRANSPORT_LUNFLAGS_READ_ONLY) || |
c66ac9db NB |
887 | (cmd->se_deve && |
888 | (cmd->se_deve->lun_flags & TRANSPORT_LUNFLAGS_READ_ONLY))) | |
889 | target_modesense_write_protect(&buf[2], type); | |
890 | ||
e3d6f909 AG |
891 | if ((dev->se_sub_dev->se_dev_attrib.emulate_write_cache > 0) && |
892 | (dev->se_sub_dev->se_dev_attrib.emulate_fua_write > 0)) | |
c66ac9db NB |
893 | target_modesense_dpofua(&buf[2], type); |
894 | ||
895 | if ((offset + 1) > cmd->data_length) | |
896 | offset = cmd->data_length; | |
897 | } | |
898 | memcpy(rbuf, buf, offset); | |
899 | ||
900 | return 0; | |
901 | } | |
902 | ||
903 | static int | |
904 | target_emulate_request_sense(struct se_cmd *cmd) | |
905 | { | |
5951146d AG |
906 | unsigned char *cdb = cmd->t_task.t_task_cdb; |
907 | unsigned char *buf = cmd->t_task.t_task_buf; | |
c66ac9db NB |
908 | u8 ua_asc = 0, ua_ascq = 0; |
909 | ||
910 | if (cdb[1] & 0x01) { | |
911 | printk(KERN_ERR "REQUEST_SENSE description emulation not" | |
912 | " supported\n"); | |
913 | return PYX_TRANSPORT_INVALID_CDB_FIELD; | |
914 | } | |
915 | if (!(core_scsi3_ua_clear_for_request_sense(cmd, &ua_asc, &ua_ascq))) { | |
916 | /* | |
917 | * CURRENT ERROR, UNIT ATTENTION | |
918 | */ | |
919 | buf[0] = 0x70; | |
920 | buf[SPC_SENSE_KEY_OFFSET] = UNIT_ATTENTION; | |
921 | /* | |
922 | * Make sure request data length is enough for additional | |
923 | * sense data. | |
924 | */ | |
925 | if (cmd->data_length <= 18) { | |
926 | buf[7] = 0x00; | |
927 | return 0; | |
928 | } | |
929 | /* | |
930 | * The Additional Sense Code (ASC) from the UNIT ATTENTION | |
931 | */ | |
932 | buf[SPC_ASC_KEY_OFFSET] = ua_asc; | |
933 | buf[SPC_ASCQ_KEY_OFFSET] = ua_ascq; | |
934 | buf[7] = 0x0A; | |
935 | } else { | |
936 | /* | |
937 | * CURRENT ERROR, NO SENSE | |
938 | */ | |
939 | buf[0] = 0x70; | |
940 | buf[SPC_SENSE_KEY_OFFSET] = NO_SENSE; | |
941 | /* | |
942 | * Make sure request data length is enough for additional | |
943 | * sense data. | |
944 | */ | |
945 | if (cmd->data_length <= 18) { | |
946 | buf[7] = 0x00; | |
947 | return 0; | |
948 | } | |
949 | /* | |
950 | * NO ADDITIONAL SENSE INFORMATION | |
951 | */ | |
952 | buf[SPC_ASC_KEY_OFFSET] = 0x00; | |
953 | buf[7] = 0x0A; | |
954 | } | |
955 | ||
956 | return 0; | |
957 | } | |
958 | ||
959 | /* | |
960 | * Used for TCM/IBLOCK and TCM/FILEIO for block/blk-lib.c level discard support. | |
961 | * Note this is not used for TCM/pSCSI passthrough | |
962 | */ | |
963 | static int | |
964 | target_emulate_unmap(struct se_task *task) | |
965 | { | |
e3d6f909 | 966 | struct se_cmd *cmd = task->task_se_cmd; |
5951146d AG |
967 | struct se_device *dev = cmd->se_dev; |
968 | unsigned char *buf = cmd->t_task.t_task_buf, *ptr = NULL; | |
969 | unsigned char *cdb = &cmd->t_task.t_task_cdb[0]; | |
c66ac9db NB |
970 | sector_t lba; |
971 | unsigned int size = cmd->data_length, range; | |
972 | int ret, offset; | |
973 | unsigned short dl, bd_dl; | |
974 | ||
975 | /* First UNMAP block descriptor starts at 8 byte offset */ | |
976 | offset = 8; | |
977 | size -= 8; | |
978 | dl = get_unaligned_be16(&cdb[0]); | |
979 | bd_dl = get_unaligned_be16(&cdb[2]); | |
980 | ptr = &buf[offset]; | |
981 | printk(KERN_INFO "UNMAP: Sub: %s Using dl: %hu bd_dl: %hu size: %hu" | |
982 | " ptr: %p\n", dev->transport->name, dl, bd_dl, size, ptr); | |
983 | ||
984 | while (size) { | |
985 | lba = get_unaligned_be64(&ptr[0]); | |
986 | range = get_unaligned_be32(&ptr[8]); | |
987 | printk(KERN_INFO "UNMAP: Using lba: %llu and range: %u\n", | |
988 | (unsigned long long)lba, range); | |
989 | ||
990 | ret = dev->transport->do_discard(dev, lba, range); | |
991 | if (ret < 0) { | |
992 | printk(KERN_ERR "blkdev_issue_discard() failed: %d\n", | |
993 | ret); | |
e3d6f909 | 994 | return ret; |
c66ac9db NB |
995 | } |
996 | ||
997 | ptr += 16; | |
998 | size -= 16; | |
999 | } | |
1000 | ||
1001 | task->task_scsi_status = GOOD; | |
1002 | transport_complete_task(task, 1); | |
1003 | return 0; | |
1004 | } | |
1005 | ||
1006 | /* | |
1007 | * Used for TCM/IBLOCK and TCM/FILEIO for block/blk-lib.c level discard support. | |
1008 | * Note this is not used for TCM/pSCSI passthrough | |
1009 | */ | |
1010 | static int | |
dd3a5ad8 | 1011 | target_emulate_write_same(struct se_task *task, int write_same32) |
c66ac9db | 1012 | { |
e3d6f909 | 1013 | struct se_cmd *cmd = task->task_se_cmd; |
5951146d | 1014 | struct se_device *dev = cmd->se_dev; |
dd3a5ad8 NB |
1015 | sector_t range, lba = cmd->t_task.t_task_lba; |
1016 | unsigned int num_blocks; | |
c66ac9db | 1017 | int ret; |
dd3a5ad8 NB |
1018 | /* |
1019 | * Extract num_blocks from the WRITE_SAME_* CDB. Then use the explict | |
1020 | * range when non zero is supplied, otherwise calculate the remaining | |
1021 | * range based on ->get_blocks() - starting LBA. | |
1022 | */ | |
1023 | if (write_same32) | |
1024 | num_blocks = get_unaligned_be32(&cmd->t_task.t_task_cdb[28]); | |
1025 | else | |
1026 | num_blocks = get_unaligned_be32(&cmd->t_task.t_task_cdb[10]); | |
c66ac9db | 1027 | |
dd3a5ad8 NB |
1028 | if (num_blocks != 0) |
1029 | range = num_blocks; | |
1030 | else | |
1031 | range = (dev->transport->get_blocks(dev) - lba); | |
c66ac9db | 1032 | |
dd3a5ad8 NB |
1033 | printk(KERN_INFO "WRITE_SAME UNMAP: LBA: %llu Range: %llu\n", |
1034 | (unsigned long long)lba, (unsigned long long)range); | |
c66ac9db NB |
1035 | |
1036 | ret = dev->transport->do_discard(dev, lba, range); | |
1037 | if (ret < 0) { | |
1038 | printk(KERN_INFO "blkdev_issue_discard() failed for WRITE_SAME\n"); | |
e3d6f909 | 1039 | return ret; |
c66ac9db NB |
1040 | } |
1041 | ||
1042 | task->task_scsi_status = GOOD; | |
1043 | transport_complete_task(task, 1); | |
1044 | return 0; | |
1045 | } | |
1046 | ||
1047 | int | |
1048 | transport_emulate_control_cdb(struct se_task *task) | |
1049 | { | |
e3d6f909 | 1050 | struct se_cmd *cmd = task->task_se_cmd; |
5951146d | 1051 | struct se_device *dev = cmd->se_dev; |
c66ac9db NB |
1052 | unsigned short service_action; |
1053 | int ret = 0; | |
1054 | ||
5951146d | 1055 | switch (cmd->t_task.t_task_cdb[0]) { |
c66ac9db NB |
1056 | case INQUIRY: |
1057 | ret = target_emulate_inquiry(cmd); | |
1058 | break; | |
1059 | case READ_CAPACITY: | |
1060 | ret = target_emulate_readcapacity(cmd); | |
1061 | break; | |
1062 | case MODE_SENSE: | |
1063 | ret = target_emulate_modesense(cmd, 0); | |
1064 | break; | |
1065 | case MODE_SENSE_10: | |
1066 | ret = target_emulate_modesense(cmd, 1); | |
1067 | break; | |
1068 | case SERVICE_ACTION_IN: | |
5951146d | 1069 | switch (cmd->t_task.t_task_cdb[1] & 0x1f) { |
c66ac9db NB |
1070 | case SAI_READ_CAPACITY_16: |
1071 | ret = target_emulate_readcapacity_16(cmd); | |
1072 | break; | |
1073 | default: | |
1074 | printk(KERN_ERR "Unsupported SA: 0x%02x\n", | |
5951146d | 1075 | cmd->t_task.t_task_cdb[1] & 0x1f); |
c66ac9db NB |
1076 | return PYX_TRANSPORT_UNKNOWN_SAM_OPCODE; |
1077 | } | |
1078 | break; | |
1079 | case REQUEST_SENSE: | |
1080 | ret = target_emulate_request_sense(cmd); | |
1081 | break; | |
1082 | case UNMAP: | |
1083 | if (!dev->transport->do_discard) { | |
1084 | printk(KERN_ERR "UNMAP emulation not supported for: %s\n", | |
1085 | dev->transport->name); | |
1086 | return PYX_TRANSPORT_UNKNOWN_SAM_OPCODE; | |
1087 | } | |
1088 | ret = target_emulate_unmap(task); | |
1089 | break; | |
1090 | case WRITE_SAME_16: | |
1091 | if (!dev->transport->do_discard) { | |
1092 | printk(KERN_ERR "WRITE_SAME_16 emulation not supported" | |
1093 | " for: %s\n", dev->transport->name); | |
1094 | return PYX_TRANSPORT_UNKNOWN_SAM_OPCODE; | |
1095 | } | |
dd3a5ad8 | 1096 | ret = target_emulate_write_same(task, 0); |
c66ac9db NB |
1097 | break; |
1098 | case VARIABLE_LENGTH_CMD: | |
1099 | service_action = | |
5951146d | 1100 | get_unaligned_be16(&cmd->t_task.t_task_cdb[8]); |
c66ac9db NB |
1101 | switch (service_action) { |
1102 | case WRITE_SAME_32: | |
1103 | if (!dev->transport->do_discard) { | |
1104 | printk(KERN_ERR "WRITE_SAME_32 SA emulation not" | |
1105 | " supported for: %s\n", | |
1106 | dev->transport->name); | |
1107 | return PYX_TRANSPORT_UNKNOWN_SAM_OPCODE; | |
1108 | } | |
dd3a5ad8 | 1109 | ret = target_emulate_write_same(task, 1); |
c66ac9db NB |
1110 | break; |
1111 | default: | |
1112 | printk(KERN_ERR "Unsupported VARIABLE_LENGTH_CMD SA:" | |
1113 | " 0x%02x\n", service_action); | |
1114 | break; | |
1115 | } | |
1116 | break; | |
1117 | case SYNCHRONIZE_CACHE: | |
1118 | case 0x91: /* SYNCHRONIZE_CACHE_16: */ | |
1119 | if (!dev->transport->do_sync_cache) { | |
1120 | printk(KERN_ERR | |
1121 | "SYNCHRONIZE_CACHE emulation not supported" | |
1122 | " for: %s\n", dev->transport->name); | |
1123 | return PYX_TRANSPORT_UNKNOWN_SAM_OPCODE; | |
1124 | } | |
1125 | dev->transport->do_sync_cache(task); | |
1126 | break; | |
1127 | case ALLOW_MEDIUM_REMOVAL: | |
1128 | case ERASE: | |
1129 | case REZERO_UNIT: | |
1130 | case SEEK_10: | |
1131 | case SPACE: | |
1132 | case START_STOP: | |
1133 | case TEST_UNIT_READY: | |
1134 | case VERIFY: | |
1135 | case WRITE_FILEMARKS: | |
1136 | break; | |
1137 | default: | |
1138 | printk(KERN_ERR "Unsupported SCSI Opcode: 0x%02x for %s\n", | |
5951146d | 1139 | cmd->t_task.t_task_cdb[0], dev->transport->name); |
c66ac9db NB |
1140 | return PYX_TRANSPORT_UNKNOWN_SAM_OPCODE; |
1141 | } | |
1142 | ||
1143 | if (ret < 0) | |
1144 | return ret; | |
1145 | task->task_scsi_status = GOOD; | |
1146 | transport_complete_task(task, 1); | |
1147 | ||
1148 | return PYX_TRANSPORT_SENT_TO_TRANSPORT; | |
1149 | } |