Commit | Line | Data |
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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 | 68 | struct se_device *dev = cmd->se_dev; |
05d1c7c0 | 69 | unsigned char *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) { | |
6708bb27 | 76 | pr_err("SCSI Inquiry payload length: %u" |
c66ac9db | 77 | " too small for EVPD=0\n", cmd->data_length); |
e3d6f909 | 78 | return -EINVAL; |
c66ac9db NB |
79 | } |
80 | ||
05d1c7c0 AG |
81 | buf = transport_kmap_first_data_page(cmd); |
82 | ||
c66ac9db NB |
83 | buf[0] = dev->transport->get_device_type(dev); |
84 | if (buf[0] == TYPE_TAPE) | |
85 | buf[1] = 0x80; | |
86 | buf[2] = dev->transport->get_device_rev(dev); | |
87 | ||
88 | /* | |
89 | * Enable SCCS and TPGS fields for Emulated ALUA | |
90 | */ | |
e3d6f909 | 91 | if (dev->se_sub_dev->t10_alua.alua_type == SPC3_ALUA_EMULATED) |
c66ac9db NB |
92 | target_fill_alua_data(lun->lun_sep, buf); |
93 | ||
94 | if (cmd->data_length < 8) { | |
95 | buf[4] = 1; /* Set additional length to 1 */ | |
05d1c7c0 | 96 | goto out; |
c66ac9db NB |
97 | } |
98 | ||
99 | buf[7] = 0x32; /* Sync=1 and CmdQue=1 */ | |
100 | ||
101 | /* | |
102 | * Do not include vendor, product, reversion info in INQUIRY | |
103 | * response payload for cdbs with a small allocation length. | |
104 | */ | |
105 | if (cmd->data_length < 36) { | |
106 | buf[4] = 3; /* Set additional length to 3 */ | |
05d1c7c0 | 107 | goto out; |
c66ac9db NB |
108 | } |
109 | ||
110 | snprintf((unsigned char *)&buf[8], 8, "LIO-ORG"); | |
111 | snprintf((unsigned char *)&buf[16], 16, "%s", | |
e3d6f909 | 112 | &dev->se_sub_dev->t10_wwn.model[0]); |
c66ac9db | 113 | snprintf((unsigned char *)&buf[32], 4, "%s", |
e3d6f909 | 114 | &dev->se_sub_dev->t10_wwn.revision[0]); |
c66ac9db | 115 | buf[4] = 31; /* Set additional length to 31 */ |
05d1c7c0 AG |
116 | |
117 | out: | |
118 | transport_kunmap_first_data_page(cmd); | |
c66ac9db NB |
119 | return 0; |
120 | } | |
121 | ||
c66ac9db NB |
122 | /* unit serial number */ |
123 | static int | |
124 | target_emulate_evpd_80(struct se_cmd *cmd, unsigned char *buf) | |
125 | { | |
5951146d | 126 | struct se_device *dev = cmd->se_dev; |
c66ac9db NB |
127 | u16 len = 0; |
128 | ||
c66ac9db NB |
129 | if (dev->se_sub_dev->su_dev_flags & |
130 | SDF_EMULATED_VPD_UNIT_SERIAL) { | |
131 | u32 unit_serial_len; | |
132 | ||
133 | unit_serial_len = | |
e3d6f909 | 134 | strlen(&dev->se_sub_dev->t10_wwn.unit_serial[0]); |
c66ac9db NB |
135 | unit_serial_len++; /* For NULL Terminator */ |
136 | ||
137 | if (((len + 4) + unit_serial_len) > cmd->data_length) { | |
138 | len += unit_serial_len; | |
139 | buf[2] = ((len >> 8) & 0xff); | |
140 | buf[3] = (len & 0xff); | |
141 | return 0; | |
142 | } | |
143 | len += sprintf((unsigned char *)&buf[4], "%s", | |
e3d6f909 | 144 | &dev->se_sub_dev->t10_wwn.unit_serial[0]); |
c66ac9db NB |
145 | len++; /* Extra Byte for NULL Terminator */ |
146 | buf[3] = len; | |
147 | } | |
148 | return 0; | |
149 | } | |
150 | ||
151 | /* | |
152 | * Device identification VPD, for a complete list of | |
153 | * DESIGNATOR TYPEs see spc4r17 Table 459. | |
154 | */ | |
155 | static int | |
156 | target_emulate_evpd_83(struct se_cmd *cmd, unsigned char *buf) | |
157 | { | |
5951146d | 158 | struct se_device *dev = cmd->se_dev; |
e3d6f909 | 159 | struct se_lun *lun = cmd->se_lun; |
c66ac9db NB |
160 | struct se_port *port = NULL; |
161 | struct se_portal_group *tpg = NULL; | |
162 | struct t10_alua_lu_gp_member *lu_gp_mem; | |
163 | struct t10_alua_tg_pt_gp *tg_pt_gp; | |
164 | struct t10_alua_tg_pt_gp_member *tg_pt_gp_mem; | |
165 | unsigned char binary, binary_new; | |
e3d6f909 | 166 | unsigned char *prod = &dev->se_sub_dev->t10_wwn.model[0]; |
c66ac9db NB |
167 | u32 prod_len; |
168 | u32 unit_serial_len, off = 0; | |
169 | int i; | |
170 | u16 len = 0, id_len; | |
171 | ||
c66ac9db NB |
172 | off = 4; |
173 | ||
174 | /* | |
175 | * NAA IEEE Registered Extended Assigned designator format, see | |
176 | * spc4r17 section 7.7.3.6.5 | |
177 | * | |
178 | * We depend upon a target_core_mod/ConfigFS provided | |
179 | * /sys/kernel/config/target/core/$HBA/$DEV/wwn/vpd_unit_serial | |
180 | * value in order to return the NAA id. | |
181 | */ | |
182 | if (!(dev->se_sub_dev->su_dev_flags & SDF_EMULATED_VPD_UNIT_SERIAL)) | |
183 | goto check_t10_vend_desc; | |
184 | ||
185 | if (off + 20 > cmd->data_length) | |
186 | goto check_t10_vend_desc; | |
187 | ||
188 | /* CODE SET == Binary */ | |
189 | buf[off++] = 0x1; | |
190 | ||
191 | /* Set ASSOICATION == addressed logical unit: 0)b */ | |
192 | buf[off] = 0x00; | |
193 | ||
194 | /* Identifier/Designator type == NAA identifier */ | |
195 | buf[off++] = 0x3; | |
196 | off++; | |
197 | ||
198 | /* Identifier/Designator length */ | |
199 | buf[off++] = 0x10; | |
200 | ||
201 | /* | |
202 | * Start NAA IEEE Registered Extended Identifier/Designator | |
203 | */ | |
204 | buf[off++] = (0x6 << 4); | |
205 | ||
206 | /* | |
207 | * Use OpenFabrics IEEE Company ID: 00 14 05 | |
208 | */ | |
209 | buf[off++] = 0x01; | |
210 | buf[off++] = 0x40; | |
211 | buf[off] = (0x5 << 4); | |
212 | ||
213 | /* | |
214 | * Return ConfigFS Unit Serial Number information for | |
215 | * VENDOR_SPECIFIC_IDENTIFIER and | |
216 | * VENDOR_SPECIFIC_IDENTIFIER_EXTENTION | |
217 | */ | |
218 | binary = transport_asciihex_to_binaryhex( | |
e3d6f909 | 219 | &dev->se_sub_dev->t10_wwn.unit_serial[0]); |
c66ac9db NB |
220 | buf[off++] |= (binary & 0xf0) >> 4; |
221 | for (i = 0; i < 24; i += 2) { | |
222 | binary_new = transport_asciihex_to_binaryhex( | |
e3d6f909 | 223 | &dev->se_sub_dev->t10_wwn.unit_serial[i+2]); |
c66ac9db NB |
224 | buf[off] = (binary & 0x0f) << 4; |
225 | buf[off++] |= (binary_new & 0xf0) >> 4; | |
226 | binary = binary_new; | |
227 | } | |
228 | len = 20; | |
229 | off = (len + 4); | |
230 | ||
231 | check_t10_vend_desc: | |
232 | /* | |
233 | * T10 Vendor Identifier Page, see spc4r17 section 7.7.3.4 | |
234 | */ | |
235 | id_len = 8; /* For Vendor field */ | |
236 | prod_len = 4; /* For VPD Header */ | |
237 | prod_len += 8; /* For Vendor field */ | |
238 | prod_len += strlen(prod); | |
239 | prod_len++; /* For : */ | |
240 | ||
241 | if (dev->se_sub_dev->su_dev_flags & | |
242 | SDF_EMULATED_VPD_UNIT_SERIAL) { | |
243 | unit_serial_len = | |
e3d6f909 | 244 | strlen(&dev->se_sub_dev->t10_wwn.unit_serial[0]); |
c66ac9db NB |
245 | unit_serial_len++; /* For NULL Terminator */ |
246 | ||
247 | if ((len + (id_len + 4) + | |
248 | (prod_len + unit_serial_len)) > | |
249 | cmd->data_length) { | |
250 | len += (prod_len + unit_serial_len); | |
251 | goto check_port; | |
252 | } | |
253 | id_len += sprintf((unsigned char *)&buf[off+12], | |
254 | "%s:%s", prod, | |
e3d6f909 | 255 | &dev->se_sub_dev->t10_wwn.unit_serial[0]); |
c66ac9db NB |
256 | } |
257 | buf[off] = 0x2; /* ASCII */ | |
258 | buf[off+1] = 0x1; /* T10 Vendor ID */ | |
259 | buf[off+2] = 0x0; | |
260 | memcpy((unsigned char *)&buf[off+4], "LIO-ORG", 8); | |
261 | /* Extra Byte for NULL Terminator */ | |
262 | id_len++; | |
263 | /* Identifier Length */ | |
264 | buf[off+3] = id_len; | |
265 | /* Header size for Designation descriptor */ | |
266 | len += (id_len + 4); | |
267 | off += (id_len + 4); | |
268 | /* | |
269 | * struct se_port is only set for INQUIRY VPD=1 through $FABRIC_MOD | |
270 | */ | |
271 | check_port: | |
272 | port = lun->lun_sep; | |
273 | if (port) { | |
274 | struct t10_alua_lu_gp *lu_gp; | |
275 | u32 padding, scsi_name_len; | |
276 | u16 lu_gp_id = 0; | |
277 | u16 tg_pt_gp_id = 0; | |
278 | u16 tpgt; | |
279 | ||
280 | tpg = port->sep_tpg; | |
281 | /* | |
282 | * Relative target port identifer, see spc4r17 | |
283 | * section 7.7.3.7 | |
284 | * | |
285 | * Get the PROTOCOL IDENTIFIER as defined by spc4r17 | |
286 | * section 7.5.1 Table 362 | |
287 | */ | |
288 | if (((len + 4) + 8) > cmd->data_length) { | |
289 | len += 8; | |
290 | goto check_tpgi; | |
291 | } | |
292 | buf[off] = | |
e3d6f909 | 293 | (tpg->se_tpg_tfo->get_fabric_proto_ident(tpg) << 4); |
c66ac9db NB |
294 | buf[off++] |= 0x1; /* CODE SET == Binary */ |
295 | buf[off] = 0x80; /* Set PIV=1 */ | |
296 | /* Set ASSOICATION == target port: 01b */ | |
297 | buf[off] |= 0x10; | |
298 | /* DESIGNATOR TYPE == Relative target port identifer */ | |
299 | buf[off++] |= 0x4; | |
300 | off++; /* Skip over Reserved */ | |
301 | buf[off++] = 4; /* DESIGNATOR LENGTH */ | |
302 | /* Skip over Obsolete field in RTPI payload | |
303 | * in Table 472 */ | |
304 | off += 2; | |
305 | buf[off++] = ((port->sep_rtpi >> 8) & 0xff); | |
306 | buf[off++] = (port->sep_rtpi & 0xff); | |
307 | len += 8; /* Header size + Designation descriptor */ | |
308 | /* | |
309 | * Target port group identifier, see spc4r17 | |
310 | * section 7.7.3.8 | |
311 | * | |
312 | * Get the PROTOCOL IDENTIFIER as defined by spc4r17 | |
313 | * section 7.5.1 Table 362 | |
314 | */ | |
315 | check_tpgi: | |
e3d6f909 | 316 | if (dev->se_sub_dev->t10_alua.alua_type != |
c66ac9db NB |
317 | SPC3_ALUA_EMULATED) |
318 | goto check_scsi_name; | |
319 | ||
320 | if (((len + 4) + 8) > cmd->data_length) { | |
321 | len += 8; | |
322 | goto check_lu_gp; | |
323 | } | |
324 | tg_pt_gp_mem = port->sep_alua_tg_pt_gp_mem; | |
325 | if (!tg_pt_gp_mem) | |
326 | goto check_lu_gp; | |
327 | ||
328 | spin_lock(&tg_pt_gp_mem->tg_pt_gp_mem_lock); | |
329 | tg_pt_gp = tg_pt_gp_mem->tg_pt_gp; | |
6708bb27 | 330 | if (!tg_pt_gp) { |
c66ac9db NB |
331 | spin_unlock(&tg_pt_gp_mem->tg_pt_gp_mem_lock); |
332 | goto check_lu_gp; | |
333 | } | |
334 | tg_pt_gp_id = tg_pt_gp->tg_pt_gp_id; | |
335 | spin_unlock(&tg_pt_gp_mem->tg_pt_gp_mem_lock); | |
336 | ||
337 | buf[off] = | |
e3d6f909 | 338 | (tpg->se_tpg_tfo->get_fabric_proto_ident(tpg) << 4); |
c66ac9db NB |
339 | buf[off++] |= 0x1; /* CODE SET == Binary */ |
340 | buf[off] = 0x80; /* Set PIV=1 */ | |
341 | /* Set ASSOICATION == target port: 01b */ | |
342 | buf[off] |= 0x10; | |
343 | /* DESIGNATOR TYPE == Target port group identifier */ | |
344 | buf[off++] |= 0x5; | |
345 | off++; /* Skip over Reserved */ | |
346 | buf[off++] = 4; /* DESIGNATOR LENGTH */ | |
347 | off += 2; /* Skip over Reserved Field */ | |
348 | buf[off++] = ((tg_pt_gp_id >> 8) & 0xff); | |
349 | buf[off++] = (tg_pt_gp_id & 0xff); | |
350 | len += 8; /* Header size + Designation descriptor */ | |
351 | /* | |
352 | * Logical Unit Group identifier, see spc4r17 | |
353 | * section 7.7.3.8 | |
354 | */ | |
355 | check_lu_gp: | |
356 | if (((len + 4) + 8) > cmd->data_length) { | |
357 | len += 8; | |
358 | goto check_scsi_name; | |
359 | } | |
360 | lu_gp_mem = dev->dev_alua_lu_gp_mem; | |
6708bb27 | 361 | if (!lu_gp_mem) |
c66ac9db NB |
362 | goto check_scsi_name; |
363 | ||
364 | spin_lock(&lu_gp_mem->lu_gp_mem_lock); | |
365 | lu_gp = lu_gp_mem->lu_gp; | |
6708bb27 | 366 | if (!lu_gp) { |
c66ac9db NB |
367 | spin_unlock(&lu_gp_mem->lu_gp_mem_lock); |
368 | goto check_scsi_name; | |
369 | } | |
370 | lu_gp_id = lu_gp->lu_gp_id; | |
371 | spin_unlock(&lu_gp_mem->lu_gp_mem_lock); | |
372 | ||
373 | buf[off++] |= 0x1; /* CODE SET == Binary */ | |
374 | /* DESIGNATOR TYPE == Logical Unit Group identifier */ | |
375 | buf[off++] |= 0x6; | |
376 | off++; /* Skip over Reserved */ | |
377 | buf[off++] = 4; /* DESIGNATOR LENGTH */ | |
378 | off += 2; /* Skip over Reserved Field */ | |
379 | buf[off++] = ((lu_gp_id >> 8) & 0xff); | |
380 | buf[off++] = (lu_gp_id & 0xff); | |
381 | len += 8; /* Header size + Designation descriptor */ | |
382 | /* | |
383 | * SCSI name string designator, see spc4r17 | |
384 | * section 7.7.3.11 | |
385 | * | |
386 | * Get the PROTOCOL IDENTIFIER as defined by spc4r17 | |
387 | * section 7.5.1 Table 362 | |
388 | */ | |
389 | check_scsi_name: | |
e3d6f909 | 390 | scsi_name_len = strlen(tpg->se_tpg_tfo->tpg_get_wwn(tpg)); |
c66ac9db NB |
391 | /* UTF-8 ",t,0x<16-bit TPGT>" + NULL Terminator */ |
392 | scsi_name_len += 10; | |
393 | /* Check for 4-byte padding */ | |
394 | padding = ((-scsi_name_len) & 3); | |
395 | if (padding != 0) | |
396 | scsi_name_len += padding; | |
397 | /* Header size + Designation descriptor */ | |
398 | scsi_name_len += 4; | |
399 | ||
400 | if (((len + 4) + scsi_name_len) > cmd->data_length) { | |
401 | len += scsi_name_len; | |
402 | goto set_len; | |
403 | } | |
404 | buf[off] = | |
e3d6f909 | 405 | (tpg->se_tpg_tfo->get_fabric_proto_ident(tpg) << 4); |
c66ac9db NB |
406 | buf[off++] |= 0x3; /* CODE SET == UTF-8 */ |
407 | buf[off] = 0x80; /* Set PIV=1 */ | |
408 | /* Set ASSOICATION == target port: 01b */ | |
409 | buf[off] |= 0x10; | |
410 | /* DESIGNATOR TYPE == SCSI name string */ | |
411 | buf[off++] |= 0x8; | |
412 | off += 2; /* Skip over Reserved and length */ | |
413 | /* | |
414 | * SCSI name string identifer containing, $FABRIC_MOD | |
415 | * dependent information. For LIO-Target and iSCSI | |
416 | * Target Port, this means "<iSCSI name>,t,0x<TPGT> in | |
417 | * UTF-8 encoding. | |
418 | */ | |
e3d6f909 | 419 | tpgt = tpg->se_tpg_tfo->tpg_get_tag(tpg); |
c66ac9db | 420 | scsi_name_len = sprintf(&buf[off], "%s,t,0x%04x", |
e3d6f909 | 421 | tpg->se_tpg_tfo->tpg_get_wwn(tpg), tpgt); |
c66ac9db NB |
422 | scsi_name_len += 1 /* Include NULL terminator */; |
423 | /* | |
424 | * The null-terminated, null-padded (see 4.4.2) SCSI | |
425 | * NAME STRING field contains a UTF-8 format string. | |
426 | * The number of bytes in the SCSI NAME STRING field | |
427 | * (i.e., the value in the DESIGNATOR LENGTH field) | |
428 | * shall be no larger than 256 and shall be a multiple | |
429 | * of four. | |
430 | */ | |
431 | if (padding) | |
432 | scsi_name_len += padding; | |
433 | ||
434 | buf[off-1] = scsi_name_len; | |
435 | off += scsi_name_len; | |
436 | /* Header size + Designation descriptor */ | |
437 | len += (scsi_name_len + 4); | |
438 | } | |
439 | set_len: | |
440 | buf[2] = ((len >> 8) & 0xff); | |
441 | buf[3] = (len & 0xff); /* Page Length for VPD 0x83 */ | |
442 | return 0; | |
443 | } | |
444 | ||
445 | /* Extended INQUIRY Data VPD Page */ | |
446 | static int | |
447 | target_emulate_evpd_86(struct se_cmd *cmd, unsigned char *buf) | |
448 | { | |
449 | if (cmd->data_length < 60) | |
450 | return 0; | |
451 | ||
c66ac9db NB |
452 | buf[2] = 0x3c; |
453 | /* Set HEADSUP, ORDSUP, SIMPSUP */ | |
454 | buf[5] = 0x07; | |
455 | ||
456 | /* If WriteCache emulation is enabled, set V_SUP */ | |
5951146d | 457 | if (cmd->se_dev->se_sub_dev->se_dev_attrib.emulate_write_cache > 0) |
c66ac9db NB |
458 | buf[6] = 0x01; |
459 | return 0; | |
460 | } | |
461 | ||
462 | /* Block Limits VPD page */ | |
463 | static int | |
464 | target_emulate_evpd_b0(struct se_cmd *cmd, unsigned char *buf) | |
465 | { | |
5951146d | 466 | struct se_device *dev = cmd->se_dev; |
c66ac9db NB |
467 | int have_tp = 0; |
468 | ||
469 | /* | |
470 | * Following sbc3r22 section 6.5.3 Block Limits VPD page, when | |
471 | * emulate_tpu=1 or emulate_tpws=1 we will be expect a | |
472 | * different page length for Thin Provisioning. | |
473 | */ | |
e3d6f909 | 474 | if (dev->se_sub_dev->se_dev_attrib.emulate_tpu || dev->se_sub_dev->se_dev_attrib.emulate_tpws) |
c66ac9db NB |
475 | have_tp = 1; |
476 | ||
477 | if (cmd->data_length < (0x10 + 4)) { | |
6708bb27 | 478 | pr_debug("Received data_length: %u" |
c66ac9db NB |
479 | " too small for EVPD 0xb0\n", |
480 | cmd->data_length); | |
e3d6f909 | 481 | return -EINVAL; |
c66ac9db NB |
482 | } |
483 | ||
484 | if (have_tp && cmd->data_length < (0x3c + 4)) { | |
6708bb27 | 485 | pr_debug("Received data_length: %u" |
c66ac9db NB |
486 | " too small for TPE=1 EVPD 0xb0\n", |
487 | cmd->data_length); | |
488 | have_tp = 0; | |
489 | } | |
490 | ||
491 | buf[0] = dev->transport->get_device_type(dev); | |
c66ac9db NB |
492 | buf[3] = have_tp ? 0x3c : 0x10; |
493 | ||
6708bb27 AG |
494 | /* Set WSNZ to 1 */ |
495 | buf[4] = 0x01; | |
496 | ||
c66ac9db NB |
497 | /* |
498 | * Set OPTIMAL TRANSFER LENGTH GRANULARITY | |
499 | */ | |
500 | put_unaligned_be16(1, &buf[6]); | |
501 | ||
502 | /* | |
503 | * Set MAXIMUM TRANSFER LENGTH | |
504 | */ | |
e3d6f909 | 505 | put_unaligned_be32(dev->se_sub_dev->se_dev_attrib.max_sectors, &buf[8]); |
c66ac9db NB |
506 | |
507 | /* | |
508 | * Set OPTIMAL TRANSFER LENGTH | |
509 | */ | |
e3d6f909 | 510 | put_unaligned_be32(dev->se_sub_dev->se_dev_attrib.optimal_sectors, &buf[12]); |
c66ac9db NB |
511 | |
512 | /* | |
513 | * Exit now if we don't support TP or the initiator sent a too | |
514 | * short buffer. | |
515 | */ | |
516 | if (!have_tp || cmd->data_length < (0x3c + 4)) | |
517 | return 0; | |
518 | ||
519 | /* | |
520 | * Set MAXIMUM UNMAP LBA COUNT | |
521 | */ | |
e3d6f909 | 522 | put_unaligned_be32(dev->se_sub_dev->se_dev_attrib.max_unmap_lba_count, &buf[20]); |
c66ac9db NB |
523 | |
524 | /* | |
525 | * Set MAXIMUM UNMAP BLOCK DESCRIPTOR COUNT | |
526 | */ | |
e3d6f909 | 527 | put_unaligned_be32(dev->se_sub_dev->se_dev_attrib.max_unmap_block_desc_count, |
c66ac9db NB |
528 | &buf[24]); |
529 | ||
530 | /* | |
531 | * Set OPTIMAL UNMAP GRANULARITY | |
532 | */ | |
e3d6f909 | 533 | put_unaligned_be32(dev->se_sub_dev->se_dev_attrib.unmap_granularity, &buf[28]); |
c66ac9db NB |
534 | |
535 | /* | |
536 | * UNMAP GRANULARITY ALIGNMENT | |
537 | */ | |
e3d6f909 | 538 | put_unaligned_be32(dev->se_sub_dev->se_dev_attrib.unmap_granularity_alignment, |
c66ac9db | 539 | &buf[32]); |
e3d6f909 | 540 | if (dev->se_sub_dev->se_dev_attrib.unmap_granularity_alignment != 0) |
c66ac9db NB |
541 | buf[32] |= 0x80; /* Set the UGAVALID bit */ |
542 | ||
543 | return 0; | |
544 | } | |
545 | ||
e22a7f07 RD |
546 | /* Block Device Characteristics VPD page */ |
547 | static int | |
548 | target_emulate_evpd_b1(struct se_cmd *cmd, unsigned char *buf) | |
549 | { | |
550 | struct se_device *dev = cmd->se_dev; | |
551 | ||
552 | buf[0] = dev->transport->get_device_type(dev); | |
553 | buf[3] = 0x3c; | |
554 | ||
555 | if (cmd->data_length >= 5 && | |
556 | dev->se_sub_dev->se_dev_attrib.is_nonrot) | |
557 | buf[5] = 1; | |
558 | ||
559 | return 0; | |
560 | } | |
561 | ||
c66ac9db NB |
562 | /* Thin Provisioning VPD */ |
563 | static int | |
564 | target_emulate_evpd_b2(struct se_cmd *cmd, unsigned char *buf) | |
565 | { | |
5951146d | 566 | struct se_device *dev = cmd->se_dev; |
c66ac9db NB |
567 | |
568 | /* | |
569 | * From sbc3r22 section 6.5.4 Thin Provisioning VPD page: | |
570 | * | |
571 | * The PAGE LENGTH field is defined in SPC-4. If the DP bit is set to | |
572 | * zero, then the page length shall be set to 0004h. If the DP bit | |
573 | * is set to one, then the page length shall be set to the value | |
574 | * defined in table 162. | |
575 | */ | |
576 | buf[0] = dev->transport->get_device_type(dev); | |
c66ac9db NB |
577 | |
578 | /* | |
579 | * Set Hardcoded length mentioned above for DP=0 | |
580 | */ | |
581 | put_unaligned_be16(0x0004, &buf[2]); | |
582 | ||
583 | /* | |
584 | * The THRESHOLD EXPONENT field indicates the threshold set size in | |
585 | * LBAs as a power of 2 (i.e., the threshold set size is equal to | |
586 | * 2(threshold exponent)). | |
587 | * | |
588 | * Note that this is currently set to 0x00 as mkp says it will be | |
589 | * changing again. We can enable this once it has settled in T10 | |
590 | * and is actually used by Linux/SCSI ML code. | |
591 | */ | |
592 | buf[4] = 0x00; | |
593 | ||
594 | /* | |
595 | * A TPU bit set to one indicates that the device server supports | |
596 | * the UNMAP command (see 5.25). A TPU bit set to zero indicates | |
597 | * that the device server does not support the UNMAP command. | |
598 | */ | |
e3d6f909 | 599 | if (dev->se_sub_dev->se_dev_attrib.emulate_tpu != 0) |
c66ac9db NB |
600 | buf[5] = 0x80; |
601 | ||
602 | /* | |
603 | * A TPWS bit set to one indicates that the device server supports | |
604 | * the use of the WRITE SAME (16) command (see 5.42) to unmap LBAs. | |
605 | * A TPWS bit set to zero indicates that the device server does not | |
606 | * support the use of the WRITE SAME (16) command to unmap LBAs. | |
607 | */ | |
e3d6f909 | 608 | if (dev->se_sub_dev->se_dev_attrib.emulate_tpws != 0) |
c66ac9db NB |
609 | buf[5] |= 0x40; |
610 | ||
611 | return 0; | |
612 | } | |
613 | ||
b2eb705e RD |
614 | static int |
615 | target_emulate_evpd_00(struct se_cmd *cmd, unsigned char *buf); | |
616 | ||
617 | static struct { | |
618 | uint8_t page; | |
619 | int (*emulate)(struct se_cmd *, unsigned char *); | |
620 | } evpd_handlers[] = { | |
621 | { .page = 0x00, .emulate = target_emulate_evpd_00 }, | |
622 | { .page = 0x80, .emulate = target_emulate_evpd_80 }, | |
623 | { .page = 0x83, .emulate = target_emulate_evpd_83 }, | |
624 | { .page = 0x86, .emulate = target_emulate_evpd_86 }, | |
625 | { .page = 0xb0, .emulate = target_emulate_evpd_b0 }, | |
e22a7f07 | 626 | { .page = 0xb1, .emulate = target_emulate_evpd_b1 }, |
b2eb705e RD |
627 | { .page = 0xb2, .emulate = target_emulate_evpd_b2 }, |
628 | }; | |
629 | ||
630 | /* supported vital product data pages */ | |
631 | static int | |
632 | target_emulate_evpd_00(struct se_cmd *cmd, unsigned char *buf) | |
633 | { | |
634 | int p; | |
635 | ||
636 | if (cmd->data_length < 8) | |
637 | return 0; | |
638 | /* | |
639 | * Only report the INQUIRY EVPD=1 pages after a valid NAA | |
640 | * Registered Extended LUN WWN has been set via ConfigFS | |
641 | * during device creation/restart. | |
642 | */ | |
643 | if (cmd->se_dev->se_sub_dev->su_dev_flags & | |
644 | SDF_EMULATED_VPD_UNIT_SERIAL) { | |
645 | buf[3] = ARRAY_SIZE(evpd_handlers); | |
646 | for (p = 0; p < min_t(int, ARRAY_SIZE(evpd_handlers), | |
647 | cmd->data_length - 4); ++p) | |
648 | buf[p + 4] = evpd_handlers[p].page; | |
649 | } | |
650 | ||
651 | return 0; | |
652 | } | |
653 | ||
c66ac9db NB |
654 | static int |
655 | target_emulate_inquiry(struct se_cmd *cmd) | |
656 | { | |
5951146d | 657 | struct se_device *dev = cmd->se_dev; |
05d1c7c0 | 658 | unsigned char *buf; |
a1d8b49a | 659 | unsigned char *cdb = cmd->t_task_cdb; |
05d1c7c0 | 660 | int p, ret; |
c66ac9db NB |
661 | |
662 | if (!(cdb[1] & 0x1)) | |
663 | return target_emulate_inquiry_std(cmd); | |
664 | ||
665 | /* | |
666 | * Make sure we at least have 4 bytes of INQUIRY response | |
667 | * payload for 0x00 going back for EVPD=1. Note that 0x80 | |
668 | * and 0x83 will check for enough payload data length and | |
669 | * jump to set_len: label when there is not enough inquiry EVPD | |
670 | * payload length left for the next outgoing EVPD metadata | |
671 | */ | |
672 | if (cmd->data_length < 4) { | |
6708bb27 | 673 | pr_err("SCSI Inquiry payload length: %u" |
c66ac9db | 674 | " too small for EVPD=1\n", cmd->data_length); |
e3d6f909 | 675 | return -EINVAL; |
c66ac9db | 676 | } |
05d1c7c0 AG |
677 | |
678 | buf = transport_kmap_first_data_page(cmd); | |
679 | ||
c66ac9db NB |
680 | buf[0] = dev->transport->get_device_type(dev); |
681 | ||
b2eb705e RD |
682 | for (p = 0; p < ARRAY_SIZE(evpd_handlers); ++p) |
683 | if (cdb[2] == evpd_handlers[p].page) { | |
684 | buf[1] = cdb[2]; | |
05d1c7c0 AG |
685 | ret = evpd_handlers[p].emulate(cmd, buf); |
686 | transport_kunmap_first_data_page(cmd); | |
687 | return ret; | |
b2eb705e | 688 | } |
c66ac9db | 689 | |
05d1c7c0 | 690 | transport_kunmap_first_data_page(cmd); |
6708bb27 | 691 | pr_err("Unknown VPD Code: 0x%02x\n", cdb[2]); |
b2eb705e | 692 | return -EINVAL; |
c66ac9db NB |
693 | } |
694 | ||
695 | static int | |
696 | target_emulate_readcapacity(struct se_cmd *cmd) | |
697 | { | |
5951146d | 698 | struct se_device *dev = cmd->se_dev; |
05d1c7c0 | 699 | unsigned char *buf; |
904f0bc4 NB |
700 | unsigned long long blocks_long = dev->transport->get_blocks(dev); |
701 | u32 blocks; | |
702 | ||
703 | if (blocks_long >= 0x00000000ffffffff) | |
704 | blocks = 0xffffffff; | |
705 | else | |
706 | blocks = (u32)blocks_long; | |
c66ac9db | 707 | |
05d1c7c0 AG |
708 | buf = transport_kmap_first_data_page(cmd); |
709 | ||
c66ac9db NB |
710 | buf[0] = (blocks >> 24) & 0xff; |
711 | buf[1] = (blocks >> 16) & 0xff; | |
712 | buf[2] = (blocks >> 8) & 0xff; | |
713 | buf[3] = blocks & 0xff; | |
e3d6f909 AG |
714 | buf[4] = (dev->se_sub_dev->se_dev_attrib.block_size >> 24) & 0xff; |
715 | buf[5] = (dev->se_sub_dev->se_dev_attrib.block_size >> 16) & 0xff; | |
716 | buf[6] = (dev->se_sub_dev->se_dev_attrib.block_size >> 8) & 0xff; | |
717 | buf[7] = dev->se_sub_dev->se_dev_attrib.block_size & 0xff; | |
c66ac9db NB |
718 | /* |
719 | * Set max 32-bit blocks to signal SERVICE ACTION READ_CAPACITY_16 | |
720 | */ | |
e3d6f909 | 721 | if (dev->se_sub_dev->se_dev_attrib.emulate_tpu || dev->se_sub_dev->se_dev_attrib.emulate_tpws) |
c66ac9db NB |
722 | put_unaligned_be32(0xFFFFFFFF, &buf[0]); |
723 | ||
05d1c7c0 AG |
724 | transport_kunmap_first_data_page(cmd); |
725 | ||
c66ac9db NB |
726 | return 0; |
727 | } | |
728 | ||
729 | static int | |
730 | target_emulate_readcapacity_16(struct se_cmd *cmd) | |
731 | { | |
5951146d | 732 | struct se_device *dev = cmd->se_dev; |
05d1c7c0 | 733 | unsigned char *buf; |
c66ac9db NB |
734 | unsigned long long blocks = dev->transport->get_blocks(dev); |
735 | ||
05d1c7c0 AG |
736 | buf = transport_kmap_first_data_page(cmd); |
737 | ||
c66ac9db NB |
738 | buf[0] = (blocks >> 56) & 0xff; |
739 | buf[1] = (blocks >> 48) & 0xff; | |
740 | buf[2] = (blocks >> 40) & 0xff; | |
741 | buf[3] = (blocks >> 32) & 0xff; | |
742 | buf[4] = (blocks >> 24) & 0xff; | |
743 | buf[5] = (blocks >> 16) & 0xff; | |
744 | buf[6] = (blocks >> 8) & 0xff; | |
745 | buf[7] = blocks & 0xff; | |
e3d6f909 AG |
746 | buf[8] = (dev->se_sub_dev->se_dev_attrib.block_size >> 24) & 0xff; |
747 | buf[9] = (dev->se_sub_dev->se_dev_attrib.block_size >> 16) & 0xff; | |
748 | buf[10] = (dev->se_sub_dev->se_dev_attrib.block_size >> 8) & 0xff; | |
749 | buf[11] = dev->se_sub_dev->se_dev_attrib.block_size & 0xff; | |
c66ac9db NB |
750 | /* |
751 | * Set Thin Provisioning Enable bit following sbc3r22 in section | |
752 | * READ CAPACITY (16) byte 14 if emulate_tpu or emulate_tpws is enabled. | |
753 | */ | |
e3d6f909 | 754 | if (dev->se_sub_dev->se_dev_attrib.emulate_tpu || dev->se_sub_dev->se_dev_attrib.emulate_tpws) |
c66ac9db NB |
755 | buf[14] = 0x80; |
756 | ||
05d1c7c0 AG |
757 | transport_kunmap_first_data_page(cmd); |
758 | ||
c66ac9db NB |
759 | return 0; |
760 | } | |
761 | ||
762 | static int | |
763 | target_modesense_rwrecovery(unsigned char *p) | |
764 | { | |
765 | p[0] = 0x01; | |
766 | p[1] = 0x0a; | |
767 | ||
768 | return 12; | |
769 | } | |
770 | ||
771 | static int | |
772 | target_modesense_control(struct se_device *dev, unsigned char *p) | |
773 | { | |
774 | p[0] = 0x0a; | |
775 | p[1] = 0x0a; | |
776 | p[2] = 2; | |
777 | /* | |
778 | * From spc4r17, section 7.4.6 Control mode Page | |
779 | * | |
780 | * Unit Attention interlocks control (UN_INTLCK_CTRL) to code 00b | |
781 | * | |
782 | * 00b: The logical unit shall clear any unit attention condition | |
783 | * reported in the same I_T_L_Q nexus transaction as a CHECK CONDITION | |
784 | * status and shall not establish a unit attention condition when a com- | |
785 | * mand is completed with BUSY, TASK SET FULL, or RESERVATION CONFLICT | |
786 | * status. | |
787 | * | |
788 | * 10b: The logical unit shall not clear any unit attention condition | |
789 | * reported in the same I_T_L_Q nexus transaction as a CHECK CONDITION | |
790 | * status and shall not establish a unit attention condition when | |
791 | * a command is completed with BUSY, TASK SET FULL, or RESERVATION | |
792 | * CONFLICT status. | |
793 | * | |
794 | * 11b a The logical unit shall not clear any unit attention condition | |
795 | * reported in the same I_T_L_Q nexus transaction as a CHECK CONDITION | |
796 | * status and shall establish a unit attention condition for the | |
797 | * initiator port associated with the I_T nexus on which the BUSY, | |
798 | * TASK SET FULL, or RESERVATION CONFLICT status is being returned. | |
799 | * Depending on the status, the additional sense code shall be set to | |
800 | * PREVIOUS BUSY STATUS, PREVIOUS TASK SET FULL STATUS, or PREVIOUS | |
801 | * RESERVATION CONFLICT STATUS. Until it is cleared by a REQUEST SENSE | |
802 | * command, a unit attention condition shall be established only once | |
803 | * for a BUSY, TASK SET FULL, or RESERVATION CONFLICT status regardless | |
804 | * to the number of commands completed with one of those status codes. | |
805 | */ | |
e3d6f909 AG |
806 | p[4] = (dev->se_sub_dev->se_dev_attrib.emulate_ua_intlck_ctrl == 2) ? 0x30 : |
807 | (dev->se_sub_dev->se_dev_attrib.emulate_ua_intlck_ctrl == 1) ? 0x20 : 0x00; | |
c66ac9db NB |
808 | /* |
809 | * From spc4r17, section 7.4.6 Control mode Page | |
810 | * | |
811 | * Task Aborted Status (TAS) bit set to zero. | |
812 | * | |
813 | * A task aborted status (TAS) bit set to zero specifies that aborted | |
814 | * tasks shall be terminated by the device server without any response | |
815 | * to the application client. A TAS bit set to one specifies that tasks | |
816 | * aborted by the actions of an I_T nexus other than the I_T nexus on | |
817 | * which the command was received shall be completed with TASK ABORTED | |
818 | * status (see SAM-4). | |
819 | */ | |
e3d6f909 | 820 | p[5] = (dev->se_sub_dev->se_dev_attrib.emulate_tas) ? 0x40 : 0x00; |
c66ac9db NB |
821 | p[8] = 0xff; |
822 | p[9] = 0xff; | |
823 | p[11] = 30; | |
824 | ||
825 | return 12; | |
826 | } | |
827 | ||
828 | static int | |
829 | target_modesense_caching(struct se_device *dev, unsigned char *p) | |
830 | { | |
831 | p[0] = 0x08; | |
832 | p[1] = 0x12; | |
e3d6f909 | 833 | if (dev->se_sub_dev->se_dev_attrib.emulate_write_cache > 0) |
c66ac9db NB |
834 | p[2] = 0x04; /* Write Cache Enable */ |
835 | p[12] = 0x20; /* Disabled Read Ahead */ | |
836 | ||
837 | return 20; | |
838 | } | |
839 | ||
840 | static void | |
841 | target_modesense_write_protect(unsigned char *buf, int type) | |
842 | { | |
843 | /* | |
844 | * I believe that the WP bit (bit 7) in the mode header is the same for | |
845 | * all device types.. | |
846 | */ | |
847 | switch (type) { | |
848 | case TYPE_DISK: | |
849 | case TYPE_TAPE: | |
850 | default: | |
851 | buf[0] |= 0x80; /* WP bit */ | |
852 | break; | |
853 | } | |
854 | } | |
855 | ||
856 | static void | |
857 | target_modesense_dpofua(unsigned char *buf, int type) | |
858 | { | |
859 | switch (type) { | |
860 | case TYPE_DISK: | |
861 | buf[0] |= 0x10; /* DPOFUA bit */ | |
862 | break; | |
863 | default: | |
864 | break; | |
865 | } | |
866 | } | |
867 | ||
868 | static int | |
869 | target_emulate_modesense(struct se_cmd *cmd, int ten) | |
870 | { | |
5951146d | 871 | struct se_device *dev = cmd->se_dev; |
a1d8b49a | 872 | char *cdb = cmd->t_task_cdb; |
05d1c7c0 | 873 | unsigned char *rbuf; |
c66ac9db NB |
874 | int type = dev->transport->get_device_type(dev); |
875 | int offset = (ten) ? 8 : 4; | |
876 | int length = 0; | |
877 | unsigned char buf[SE_MODE_PAGE_BUF]; | |
878 | ||
879 | memset(buf, 0, SE_MODE_PAGE_BUF); | |
880 | ||
881 | switch (cdb[2] & 0x3f) { | |
882 | case 0x01: | |
883 | length = target_modesense_rwrecovery(&buf[offset]); | |
884 | break; | |
885 | case 0x08: | |
886 | length = target_modesense_caching(dev, &buf[offset]); | |
887 | break; | |
888 | case 0x0a: | |
889 | length = target_modesense_control(dev, &buf[offset]); | |
890 | break; | |
891 | case 0x3f: | |
892 | length = target_modesense_rwrecovery(&buf[offset]); | |
893 | length += target_modesense_caching(dev, &buf[offset+length]); | |
894 | length += target_modesense_control(dev, &buf[offset+length]); | |
895 | break; | |
896 | default: | |
6708bb27 | 897 | pr_err("Got Unknown Mode Page: 0x%02x\n", |
c66ac9db NB |
898 | cdb[2] & 0x3f); |
899 | return PYX_TRANSPORT_UNKNOWN_MODE_PAGE; | |
900 | } | |
901 | offset += length; | |
902 | ||
903 | if (ten) { | |
904 | offset -= 2; | |
905 | buf[0] = (offset >> 8) & 0xff; | |
906 | buf[1] = offset & 0xff; | |
907 | ||
e3d6f909 | 908 | if ((cmd->se_lun->lun_access & TRANSPORT_LUNFLAGS_READ_ONLY) || |
c66ac9db NB |
909 | (cmd->se_deve && |
910 | (cmd->se_deve->lun_flags & TRANSPORT_LUNFLAGS_READ_ONLY))) | |
911 | target_modesense_write_protect(&buf[3], type); | |
912 | ||
e3d6f909 AG |
913 | if ((dev->se_sub_dev->se_dev_attrib.emulate_write_cache > 0) && |
914 | (dev->se_sub_dev->se_dev_attrib.emulate_fua_write > 0)) | |
c66ac9db NB |
915 | target_modesense_dpofua(&buf[3], type); |
916 | ||
917 | if ((offset + 2) > cmd->data_length) | |
918 | offset = cmd->data_length; | |
919 | ||
920 | } else { | |
921 | offset -= 1; | |
922 | buf[0] = offset & 0xff; | |
923 | ||
e3d6f909 | 924 | if ((cmd->se_lun->lun_access & TRANSPORT_LUNFLAGS_READ_ONLY) || |
c66ac9db NB |
925 | (cmd->se_deve && |
926 | (cmd->se_deve->lun_flags & TRANSPORT_LUNFLAGS_READ_ONLY))) | |
927 | target_modesense_write_protect(&buf[2], type); | |
928 | ||
e3d6f909 AG |
929 | if ((dev->se_sub_dev->se_dev_attrib.emulate_write_cache > 0) && |
930 | (dev->se_sub_dev->se_dev_attrib.emulate_fua_write > 0)) | |
c66ac9db NB |
931 | target_modesense_dpofua(&buf[2], type); |
932 | ||
933 | if ((offset + 1) > cmd->data_length) | |
934 | offset = cmd->data_length; | |
935 | } | |
05d1c7c0 AG |
936 | |
937 | rbuf = transport_kmap_first_data_page(cmd); | |
c66ac9db | 938 | memcpy(rbuf, buf, offset); |
05d1c7c0 | 939 | transport_kunmap_first_data_page(cmd); |
c66ac9db NB |
940 | |
941 | return 0; | |
942 | } | |
943 | ||
944 | static int | |
945 | target_emulate_request_sense(struct se_cmd *cmd) | |
946 | { | |
a1d8b49a | 947 | unsigned char *cdb = cmd->t_task_cdb; |
05d1c7c0 | 948 | unsigned char *buf; |
c66ac9db | 949 | u8 ua_asc = 0, ua_ascq = 0; |
05d1c7c0 | 950 | int err = 0; |
c66ac9db NB |
951 | |
952 | if (cdb[1] & 0x01) { | |
6708bb27 | 953 | pr_err("REQUEST_SENSE description emulation not" |
c66ac9db NB |
954 | " supported\n"); |
955 | return PYX_TRANSPORT_INVALID_CDB_FIELD; | |
956 | } | |
05d1c7c0 AG |
957 | |
958 | buf = transport_kmap_first_data_page(cmd); | |
959 | ||
6708bb27 | 960 | if (!core_scsi3_ua_clear_for_request_sense(cmd, &ua_asc, &ua_ascq)) { |
c66ac9db NB |
961 | /* |
962 | * CURRENT ERROR, UNIT ATTENTION | |
963 | */ | |
964 | buf[0] = 0x70; | |
965 | buf[SPC_SENSE_KEY_OFFSET] = UNIT_ATTENTION; | |
966 | /* | |
967 | * Make sure request data length is enough for additional | |
968 | * sense data. | |
969 | */ | |
970 | if (cmd->data_length <= 18) { | |
971 | buf[7] = 0x00; | |
05d1c7c0 AG |
972 | err = -EINVAL; |
973 | goto end; | |
c66ac9db NB |
974 | } |
975 | /* | |
976 | * The Additional Sense Code (ASC) from the UNIT ATTENTION | |
977 | */ | |
978 | buf[SPC_ASC_KEY_OFFSET] = ua_asc; | |
979 | buf[SPC_ASCQ_KEY_OFFSET] = ua_ascq; | |
980 | buf[7] = 0x0A; | |
981 | } else { | |
982 | /* | |
983 | * CURRENT ERROR, NO SENSE | |
984 | */ | |
985 | buf[0] = 0x70; | |
986 | buf[SPC_SENSE_KEY_OFFSET] = NO_SENSE; | |
987 | /* | |
988 | * Make sure request data length is enough for additional | |
989 | * sense data. | |
990 | */ | |
991 | if (cmd->data_length <= 18) { | |
992 | buf[7] = 0x00; | |
05d1c7c0 AG |
993 | err = -EINVAL; |
994 | goto end; | |
c66ac9db NB |
995 | } |
996 | /* | |
997 | * NO ADDITIONAL SENSE INFORMATION | |
998 | */ | |
999 | buf[SPC_ASC_KEY_OFFSET] = 0x00; | |
1000 | buf[7] = 0x0A; | |
1001 | } | |
1002 | ||
05d1c7c0 AG |
1003 | end: |
1004 | transport_kunmap_first_data_page(cmd); | |
1005 | ||
c66ac9db NB |
1006 | return 0; |
1007 | } | |
1008 | ||
1009 | /* | |
1010 | * Used for TCM/IBLOCK and TCM/FILEIO for block/blk-lib.c level discard support. | |
1011 | * Note this is not used for TCM/pSCSI passthrough | |
1012 | */ | |
1013 | static int | |
1014 | target_emulate_unmap(struct se_task *task) | |
1015 | { | |
e3d6f909 | 1016 | struct se_cmd *cmd = task->task_se_cmd; |
5951146d | 1017 | struct se_device *dev = cmd->se_dev; |
05d1c7c0 | 1018 | unsigned char *buf, *ptr = NULL; |
a1d8b49a | 1019 | unsigned char *cdb = &cmd->t_task_cdb[0]; |
c66ac9db NB |
1020 | sector_t lba; |
1021 | unsigned int size = cmd->data_length, range; | |
05d1c7c0 | 1022 | int ret = 0, offset; |
c66ac9db NB |
1023 | unsigned short dl, bd_dl; |
1024 | ||
1025 | /* First UNMAP block descriptor starts at 8 byte offset */ | |
1026 | offset = 8; | |
1027 | size -= 8; | |
1028 | dl = get_unaligned_be16(&cdb[0]); | |
1029 | bd_dl = get_unaligned_be16(&cdb[2]); | |
05d1c7c0 AG |
1030 | |
1031 | buf = transport_kmap_first_data_page(cmd); | |
1032 | ||
c66ac9db | 1033 | ptr = &buf[offset]; |
6708bb27 | 1034 | pr_debug("UNMAP: Sub: %s Using dl: %hu bd_dl: %hu size: %hu" |
c66ac9db NB |
1035 | " ptr: %p\n", dev->transport->name, dl, bd_dl, size, ptr); |
1036 | ||
1037 | while (size) { | |
1038 | lba = get_unaligned_be64(&ptr[0]); | |
1039 | range = get_unaligned_be32(&ptr[8]); | |
6708bb27 | 1040 | pr_debug("UNMAP: Using lba: %llu and range: %u\n", |
c66ac9db NB |
1041 | (unsigned long long)lba, range); |
1042 | ||
1043 | ret = dev->transport->do_discard(dev, lba, range); | |
1044 | if (ret < 0) { | |
6708bb27 | 1045 | pr_err("blkdev_issue_discard() failed: %d\n", |
c66ac9db | 1046 | ret); |
05d1c7c0 | 1047 | goto err; |
c66ac9db NB |
1048 | } |
1049 | ||
1050 | ptr += 16; | |
1051 | size -= 16; | |
1052 | } | |
1053 | ||
1054 | task->task_scsi_status = GOOD; | |
1055 | transport_complete_task(task, 1); | |
05d1c7c0 AG |
1056 | err: |
1057 | transport_kunmap_first_data_page(cmd); | |
1058 | ||
1059 | return ret; | |
c66ac9db NB |
1060 | } |
1061 | ||
1062 | /* | |
1063 | * Used for TCM/IBLOCK and TCM/FILEIO for block/blk-lib.c level discard support. | |
1064 | * Note this is not used for TCM/pSCSI passthrough | |
1065 | */ | |
1066 | static int | |
dd3a5ad8 | 1067 | target_emulate_write_same(struct se_task *task, int write_same32) |
c66ac9db | 1068 | { |
e3d6f909 | 1069 | struct se_cmd *cmd = task->task_se_cmd; |
5951146d | 1070 | struct se_device *dev = cmd->se_dev; |
a1d8b49a AG |
1071 | sector_t range; |
1072 | sector_t lba = cmd->t_task_lba; | |
dd3a5ad8 | 1073 | unsigned int num_blocks; |
c66ac9db | 1074 | int ret; |
dd3a5ad8 NB |
1075 | /* |
1076 | * Extract num_blocks from the WRITE_SAME_* CDB. Then use the explict | |
1077 | * range when non zero is supplied, otherwise calculate the remaining | |
1078 | * range based on ->get_blocks() - starting LBA. | |
1079 | */ | |
1080 | if (write_same32) | |
a1d8b49a | 1081 | num_blocks = get_unaligned_be32(&cmd->t_task_cdb[28]); |
dd3a5ad8 | 1082 | else |
a1d8b49a | 1083 | num_blocks = get_unaligned_be32(&cmd->t_task_cdb[10]); |
c66ac9db | 1084 | |
dd3a5ad8 NB |
1085 | if (num_blocks != 0) |
1086 | range = num_blocks; | |
1087 | else | |
1088 | range = (dev->transport->get_blocks(dev) - lba); | |
c66ac9db | 1089 | |
6708bb27 | 1090 | pr_debug("WRITE_SAME UNMAP: LBA: %llu Range: %llu\n", |
dd3a5ad8 | 1091 | (unsigned long long)lba, (unsigned long long)range); |
c66ac9db NB |
1092 | |
1093 | ret = dev->transport->do_discard(dev, lba, range); | |
1094 | if (ret < 0) { | |
6708bb27 | 1095 | pr_debug("blkdev_issue_discard() failed for WRITE_SAME\n"); |
e3d6f909 | 1096 | return ret; |
c66ac9db NB |
1097 | } |
1098 | ||
1099 | task->task_scsi_status = GOOD; | |
1100 | transport_complete_task(task, 1); | |
1101 | return 0; | |
1102 | } | |
1103 | ||
1104 | int | |
1105 | transport_emulate_control_cdb(struct se_task *task) | |
1106 | { | |
e3d6f909 | 1107 | struct se_cmd *cmd = task->task_se_cmd; |
5951146d | 1108 | struct se_device *dev = cmd->se_dev; |
c66ac9db NB |
1109 | unsigned short service_action; |
1110 | int ret = 0; | |
1111 | ||
a1d8b49a | 1112 | switch (cmd->t_task_cdb[0]) { |
c66ac9db NB |
1113 | case INQUIRY: |
1114 | ret = target_emulate_inquiry(cmd); | |
1115 | break; | |
1116 | case READ_CAPACITY: | |
1117 | ret = target_emulate_readcapacity(cmd); | |
1118 | break; | |
1119 | case MODE_SENSE: | |
1120 | ret = target_emulate_modesense(cmd, 0); | |
1121 | break; | |
1122 | case MODE_SENSE_10: | |
1123 | ret = target_emulate_modesense(cmd, 1); | |
1124 | break; | |
1125 | case SERVICE_ACTION_IN: | |
a1d8b49a | 1126 | switch (cmd->t_task_cdb[1] & 0x1f) { |
c66ac9db NB |
1127 | case SAI_READ_CAPACITY_16: |
1128 | ret = target_emulate_readcapacity_16(cmd); | |
1129 | break; | |
1130 | default: | |
6708bb27 | 1131 | pr_err("Unsupported SA: 0x%02x\n", |
a1d8b49a | 1132 | cmd->t_task_cdb[1] & 0x1f); |
c66ac9db NB |
1133 | return PYX_TRANSPORT_UNKNOWN_SAM_OPCODE; |
1134 | } | |
1135 | break; | |
1136 | case REQUEST_SENSE: | |
1137 | ret = target_emulate_request_sense(cmd); | |
1138 | break; | |
1139 | case UNMAP: | |
1140 | if (!dev->transport->do_discard) { | |
6708bb27 | 1141 | pr_err("UNMAP emulation not supported for: %s\n", |
c66ac9db NB |
1142 | dev->transport->name); |
1143 | return PYX_TRANSPORT_UNKNOWN_SAM_OPCODE; | |
1144 | } | |
1145 | ret = target_emulate_unmap(task); | |
1146 | break; | |
1147 | case WRITE_SAME_16: | |
1148 | if (!dev->transport->do_discard) { | |
6708bb27 | 1149 | pr_err("WRITE_SAME_16 emulation not supported" |
c66ac9db NB |
1150 | " for: %s\n", dev->transport->name); |
1151 | return PYX_TRANSPORT_UNKNOWN_SAM_OPCODE; | |
1152 | } | |
dd3a5ad8 | 1153 | ret = target_emulate_write_same(task, 0); |
c66ac9db NB |
1154 | break; |
1155 | case VARIABLE_LENGTH_CMD: | |
1156 | service_action = | |
a1d8b49a | 1157 | get_unaligned_be16(&cmd->t_task_cdb[8]); |
c66ac9db NB |
1158 | switch (service_action) { |
1159 | case WRITE_SAME_32: | |
1160 | if (!dev->transport->do_discard) { | |
6708bb27 | 1161 | pr_err("WRITE_SAME_32 SA emulation not" |
c66ac9db NB |
1162 | " supported for: %s\n", |
1163 | dev->transport->name); | |
1164 | return PYX_TRANSPORT_UNKNOWN_SAM_OPCODE; | |
1165 | } | |
dd3a5ad8 | 1166 | ret = target_emulate_write_same(task, 1); |
c66ac9db NB |
1167 | break; |
1168 | default: | |
6708bb27 | 1169 | pr_err("Unsupported VARIABLE_LENGTH_CMD SA:" |
c66ac9db NB |
1170 | " 0x%02x\n", service_action); |
1171 | break; | |
1172 | } | |
1173 | break; | |
1174 | case SYNCHRONIZE_CACHE: | |
1175 | case 0x91: /* SYNCHRONIZE_CACHE_16: */ | |
1176 | if (!dev->transport->do_sync_cache) { | |
6708bb27 | 1177 | pr_err("SYNCHRONIZE_CACHE emulation not supported" |
c66ac9db NB |
1178 | " for: %s\n", dev->transport->name); |
1179 | return PYX_TRANSPORT_UNKNOWN_SAM_OPCODE; | |
1180 | } | |
1181 | dev->transport->do_sync_cache(task); | |
1182 | break; | |
1183 | case ALLOW_MEDIUM_REMOVAL: | |
1184 | case ERASE: | |
1185 | case REZERO_UNIT: | |
1186 | case SEEK_10: | |
1187 | case SPACE: | |
1188 | case START_STOP: | |
1189 | case TEST_UNIT_READY: | |
1190 | case VERIFY: | |
1191 | case WRITE_FILEMARKS: | |
1192 | break; | |
1193 | default: | |
6708bb27 | 1194 | pr_err("Unsupported SCSI Opcode: 0x%02x for %s\n", |
a1d8b49a | 1195 | cmd->t_task_cdb[0], dev->transport->name); |
c66ac9db NB |
1196 | return PYX_TRANSPORT_UNKNOWN_SAM_OPCODE; |
1197 | } | |
1198 | ||
1199 | if (ret < 0) | |
1200 | return ret; | |
1201 | task->task_scsi_status = GOOD; | |
1202 | transport_complete_task(task, 1); | |
1203 | ||
1204 | return PYX_TRANSPORT_SENT_TO_TRANSPORT; | |
1205 | } |