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> |
c9abb9bb | 27 | #include <linux/module.h> |
c66ac9db NB |
28 | #include <asm/unaligned.h> |
29 | #include <scsi/scsi.h> | |
30 | ||
31 | #include <target/target_core_base.h> | |
c4795fb2 CH |
32 | #include <target/target_core_backend.h> |
33 | #include <target/target_core_fabric.h> | |
e26d99ae CH |
34 | |
35 | #include "target_core_internal.h" | |
c66ac9db NB |
36 | #include "target_core_ua.h" |
37 | ||
38 | static void | |
39 | target_fill_alua_data(struct se_port *port, unsigned char *buf) | |
40 | { | |
41 | struct t10_alua_tg_pt_gp *tg_pt_gp; | |
42 | struct t10_alua_tg_pt_gp_member *tg_pt_gp_mem; | |
43 | ||
44 | /* | |
45 | * Set SCCS for MAINTENANCE_IN + REPORT_TARGET_PORT_GROUPS. | |
46 | */ | |
47 | buf[5] = 0x80; | |
48 | ||
49 | /* | |
50 | * Set TPGS field for explict and/or implict ALUA access type | |
51 | * and opteration. | |
52 | * | |
53 | * See spc4r17 section 6.4.2 Table 135 | |
54 | */ | |
55 | if (!port) | |
56 | return; | |
57 | tg_pt_gp_mem = port->sep_alua_tg_pt_gp_mem; | |
58 | if (!tg_pt_gp_mem) | |
59 | return; | |
60 | ||
61 | spin_lock(&tg_pt_gp_mem->tg_pt_gp_mem_lock); | |
62 | tg_pt_gp = tg_pt_gp_mem->tg_pt_gp; | |
63 | if (tg_pt_gp) | |
64 | buf[5] |= tg_pt_gp->tg_pt_gp_alua_access_type; | |
65 | spin_unlock(&tg_pt_gp_mem->tg_pt_gp_mem_lock); | |
66 | } | |
67 | ||
68 | static int | |
d95b8246 | 69 | target_emulate_inquiry_std(struct se_cmd *cmd, char *buf) |
c66ac9db | 70 | { |
e3d6f909 | 71 | struct se_lun *lun = cmd->se_lun; |
5951146d | 72 | struct se_device *dev = cmd->se_dev; |
052605c6 | 73 | struct se_portal_group *tpg = lun->lun_sep->sep_tpg; |
05d1c7c0 | 74 | |
052605c6 NB |
75 | if (dev == tpg->tpg_virt_lun0.lun_se_dev) { |
76 | buf[0] = 0x3f; /* Not connected */ | |
77 | } else { | |
78 | buf[0] = dev->transport->get_device_type(dev); | |
79 | if (buf[0] == TYPE_TAPE) | |
80 | buf[1] = 0x80; | |
81 | } | |
c66ac9db NB |
82 | buf[2] = dev->transport->get_device_rev(dev); |
83 | ||
ce136176 RD |
84 | /* |
85 | * NORMACA and HISUP = 0, RESPONSE DATA FORMAT = 2 | |
86 | * | |
87 | * SPC4 says: | |
88 | * A RESPONSE DATA FORMAT field set to 2h indicates that the | |
89 | * standard INQUIRY data is in the format defined in this | |
90 | * standard. Response data format values less than 2h are | |
91 | * obsolete. Response data format values greater than 2h are | |
92 | * reserved. | |
93 | */ | |
94 | buf[3] = 2; | |
95 | ||
c66ac9db NB |
96 | /* |
97 | * Enable SCCS and TPGS fields for Emulated ALUA | |
98 | */ | |
e3d6f909 | 99 | if (dev->se_sub_dev->t10_alua.alua_type == SPC3_ALUA_EMULATED) |
c66ac9db NB |
100 | target_fill_alua_data(lun->lun_sep, buf); |
101 | ||
c66ac9db NB |
102 | buf[7] = 0x32; /* Sync=1 and CmdQue=1 */ |
103 | ||
8359cf43 JE |
104 | snprintf(&buf[8], 8, "LIO-ORG"); |
105 | snprintf(&buf[16], 16, "%s", dev->se_sub_dev->t10_wwn.model); | |
106 | snprintf(&buf[32], 4, "%s", dev->se_sub_dev->t10_wwn.revision); | |
c66ac9db | 107 | buf[4] = 31; /* Set additional length to 31 */ |
05d1c7c0 | 108 | |
c66ac9db NB |
109 | return 0; |
110 | } | |
111 | ||
c66ac9db NB |
112 | /* unit serial number */ |
113 | static int | |
114 | target_emulate_evpd_80(struct se_cmd *cmd, unsigned char *buf) | |
115 | { | |
5951146d | 116 | struct se_device *dev = cmd->se_dev; |
c66ac9db NB |
117 | u16 len = 0; |
118 | ||
c66ac9db NB |
119 | if (dev->se_sub_dev->su_dev_flags & |
120 | SDF_EMULATED_VPD_UNIT_SERIAL) { | |
121 | u32 unit_serial_len; | |
122 | ||
8359cf43 | 123 | unit_serial_len = strlen(dev->se_sub_dev->t10_wwn.unit_serial); |
c66ac9db NB |
124 | unit_serial_len++; /* For NULL Terminator */ |
125 | ||
8359cf43 JE |
126 | len += sprintf(&buf[4], "%s", |
127 | dev->se_sub_dev->t10_wwn.unit_serial); | |
c66ac9db NB |
128 | len++; /* Extra Byte for NULL Terminator */ |
129 | buf[3] = len; | |
130 | } | |
131 | return 0; | |
132 | } | |
133 | ||
784eb99e | 134 | static void |
b6b4e61f | 135 | target_parse_naa_6h_vendor_specific(struct se_device *dev, unsigned char *buf) |
784eb99e NB |
136 | { |
137 | unsigned char *p = &dev->se_sub_dev->t10_wwn.unit_serial[0]; | |
b6b4e61f AS |
138 | int cnt; |
139 | bool next = true; | |
140 | ||
784eb99e NB |
141 | /* |
142 | * Generate up to 36 bits of VENDOR SPECIFIC IDENTIFIER starting on | |
143 | * byte 3 bit 3-0 for NAA IEEE Registered Extended DESIGNATOR field | |
144 | * format, followed by 64 bits of VENDOR SPECIFIC IDENTIFIER EXTENSION | |
145 | * to complete the payload. These are based from VPD=0x80 PRODUCT SERIAL | |
146 | * NUMBER set via vpd_unit_serial in target_core_configfs.c to ensure | |
147 | * per device uniqeness. | |
148 | */ | |
b6b4e61f AS |
149 | for (cnt = 0; *p && cnt < 13; p++) { |
150 | int val = hex_to_bin(*p); | |
151 | ||
152 | if (val < 0) | |
784eb99e | 153 | continue; |
b6b4e61f AS |
154 | |
155 | if (next) { | |
156 | next = false; | |
157 | buf[cnt++] |= val; | |
784eb99e | 158 | } else { |
b6b4e61f AS |
159 | next = true; |
160 | buf[cnt] = val << 4; | |
784eb99e NB |
161 | } |
162 | } | |
163 | } | |
164 | ||
c66ac9db NB |
165 | /* |
166 | * Device identification VPD, for a complete list of | |
167 | * DESIGNATOR TYPEs see spc4r17 Table 459. | |
168 | */ | |
169 | static int | |
170 | target_emulate_evpd_83(struct se_cmd *cmd, unsigned char *buf) | |
171 | { | |
5951146d | 172 | struct se_device *dev = cmd->se_dev; |
e3d6f909 | 173 | struct se_lun *lun = cmd->se_lun; |
c66ac9db NB |
174 | struct se_port *port = NULL; |
175 | struct se_portal_group *tpg = NULL; | |
176 | struct t10_alua_lu_gp_member *lu_gp_mem; | |
177 | struct t10_alua_tg_pt_gp *tg_pt_gp; | |
178 | struct t10_alua_tg_pt_gp_member *tg_pt_gp_mem; | |
e3d6f909 | 179 | unsigned char *prod = &dev->se_sub_dev->t10_wwn.model[0]; |
c66ac9db NB |
180 | u32 prod_len; |
181 | u32 unit_serial_len, off = 0; | |
c66ac9db NB |
182 | u16 len = 0, id_len; |
183 | ||
c66ac9db NB |
184 | off = 4; |
185 | ||
186 | /* | |
187 | * NAA IEEE Registered Extended Assigned designator format, see | |
188 | * spc4r17 section 7.7.3.6.5 | |
189 | * | |
190 | * We depend upon a target_core_mod/ConfigFS provided | |
191 | * /sys/kernel/config/target/core/$HBA/$DEV/wwn/vpd_unit_serial | |
192 | * value in order to return the NAA id. | |
193 | */ | |
194 | if (!(dev->se_sub_dev->su_dev_flags & SDF_EMULATED_VPD_UNIT_SERIAL)) | |
195 | goto check_t10_vend_desc; | |
196 | ||
c66ac9db NB |
197 | /* CODE SET == Binary */ |
198 | buf[off++] = 0x1; | |
199 | ||
163cd5fa | 200 | /* Set ASSOCIATION == addressed logical unit: 0)b */ |
c66ac9db NB |
201 | buf[off] = 0x00; |
202 | ||
203 | /* Identifier/Designator type == NAA identifier */ | |
163cd5fa | 204 | buf[off++] |= 0x3; |
c66ac9db NB |
205 | off++; |
206 | ||
207 | /* Identifier/Designator length */ | |
208 | buf[off++] = 0x10; | |
209 | ||
210 | /* | |
211 | * Start NAA IEEE Registered Extended Identifier/Designator | |
212 | */ | |
213 | buf[off++] = (0x6 << 4); | |
214 | ||
215 | /* | |
216 | * Use OpenFabrics IEEE Company ID: 00 14 05 | |
217 | */ | |
218 | buf[off++] = 0x01; | |
219 | buf[off++] = 0x40; | |
220 | buf[off] = (0x5 << 4); | |
221 | ||
222 | /* | |
223 | * Return ConfigFS Unit Serial Number information for | |
224 | * VENDOR_SPECIFIC_IDENTIFIER and | |
225 | * VENDOR_SPECIFIC_IDENTIFIER_EXTENTION | |
226 | */ | |
784eb99e | 227 | target_parse_naa_6h_vendor_specific(dev, &buf[off]); |
11650b85 | 228 | |
c66ac9db NB |
229 | len = 20; |
230 | off = (len + 4); | |
231 | ||
232 | check_t10_vend_desc: | |
233 | /* | |
234 | * T10 Vendor Identifier Page, see spc4r17 section 7.7.3.4 | |
235 | */ | |
236 | id_len = 8; /* For Vendor field */ | |
237 | prod_len = 4; /* For VPD Header */ | |
238 | prod_len += 8; /* For Vendor field */ | |
239 | prod_len += strlen(prod); | |
240 | prod_len++; /* For : */ | |
241 | ||
242 | if (dev->se_sub_dev->su_dev_flags & | |
243 | SDF_EMULATED_VPD_UNIT_SERIAL) { | |
244 | unit_serial_len = | |
e3d6f909 | 245 | strlen(&dev->se_sub_dev->t10_wwn.unit_serial[0]); |
c66ac9db NB |
246 | unit_serial_len++; /* For NULL Terminator */ |
247 | ||
8359cf43 | 248 | id_len += sprintf(&buf[off+12], "%s:%s", prod, |
e3d6f909 | 249 | &dev->se_sub_dev->t10_wwn.unit_serial[0]); |
c66ac9db NB |
250 | } |
251 | buf[off] = 0x2; /* ASCII */ | |
252 | buf[off+1] = 0x1; /* T10 Vendor ID */ | |
253 | buf[off+2] = 0x0; | |
8359cf43 | 254 | memcpy(&buf[off+4], "LIO-ORG", 8); |
c66ac9db NB |
255 | /* Extra Byte for NULL Terminator */ |
256 | id_len++; | |
257 | /* Identifier Length */ | |
258 | buf[off+3] = id_len; | |
259 | /* Header size for Designation descriptor */ | |
260 | len += (id_len + 4); | |
261 | off += (id_len + 4); | |
262 | /* | |
263 | * struct se_port is only set for INQUIRY VPD=1 through $FABRIC_MOD | |
264 | */ | |
c66ac9db NB |
265 | port = lun->lun_sep; |
266 | if (port) { | |
267 | struct t10_alua_lu_gp *lu_gp; | |
268 | u32 padding, scsi_name_len; | |
269 | u16 lu_gp_id = 0; | |
270 | u16 tg_pt_gp_id = 0; | |
271 | u16 tpgt; | |
272 | ||
273 | tpg = port->sep_tpg; | |
274 | /* | |
275 | * Relative target port identifer, see spc4r17 | |
276 | * section 7.7.3.7 | |
277 | * | |
278 | * Get the PROTOCOL IDENTIFIER as defined by spc4r17 | |
279 | * section 7.5.1 Table 362 | |
280 | */ | |
c66ac9db | 281 | buf[off] = |
e3d6f909 | 282 | (tpg->se_tpg_tfo->get_fabric_proto_ident(tpg) << 4); |
c66ac9db NB |
283 | buf[off++] |= 0x1; /* CODE SET == Binary */ |
284 | buf[off] = 0x80; /* Set PIV=1 */ | |
163cd5fa | 285 | /* Set ASSOCIATION == target port: 01b */ |
c66ac9db NB |
286 | buf[off] |= 0x10; |
287 | /* DESIGNATOR TYPE == Relative target port identifer */ | |
288 | buf[off++] |= 0x4; | |
289 | off++; /* Skip over Reserved */ | |
290 | buf[off++] = 4; /* DESIGNATOR LENGTH */ | |
291 | /* Skip over Obsolete field in RTPI payload | |
292 | * in Table 472 */ | |
293 | off += 2; | |
294 | buf[off++] = ((port->sep_rtpi >> 8) & 0xff); | |
295 | buf[off++] = (port->sep_rtpi & 0xff); | |
296 | len += 8; /* Header size + Designation descriptor */ | |
297 | /* | |
298 | * Target port group identifier, see spc4r17 | |
299 | * section 7.7.3.8 | |
300 | * | |
301 | * Get the PROTOCOL IDENTIFIER as defined by spc4r17 | |
302 | * section 7.5.1 Table 362 | |
303 | */ | |
e3d6f909 | 304 | if (dev->se_sub_dev->t10_alua.alua_type != |
c66ac9db NB |
305 | SPC3_ALUA_EMULATED) |
306 | goto check_scsi_name; | |
307 | ||
c66ac9db NB |
308 | tg_pt_gp_mem = port->sep_alua_tg_pt_gp_mem; |
309 | if (!tg_pt_gp_mem) | |
310 | goto check_lu_gp; | |
311 | ||
312 | spin_lock(&tg_pt_gp_mem->tg_pt_gp_mem_lock); | |
313 | tg_pt_gp = tg_pt_gp_mem->tg_pt_gp; | |
6708bb27 | 314 | if (!tg_pt_gp) { |
c66ac9db NB |
315 | spin_unlock(&tg_pt_gp_mem->tg_pt_gp_mem_lock); |
316 | goto check_lu_gp; | |
317 | } | |
318 | tg_pt_gp_id = tg_pt_gp->tg_pt_gp_id; | |
319 | spin_unlock(&tg_pt_gp_mem->tg_pt_gp_mem_lock); | |
320 | ||
321 | buf[off] = | |
e3d6f909 | 322 | (tpg->se_tpg_tfo->get_fabric_proto_ident(tpg) << 4); |
c66ac9db NB |
323 | buf[off++] |= 0x1; /* CODE SET == Binary */ |
324 | buf[off] = 0x80; /* Set PIV=1 */ | |
163cd5fa | 325 | /* Set ASSOCIATION == target port: 01b */ |
c66ac9db NB |
326 | buf[off] |= 0x10; |
327 | /* DESIGNATOR TYPE == Target port group identifier */ | |
328 | buf[off++] |= 0x5; | |
329 | off++; /* Skip over Reserved */ | |
330 | buf[off++] = 4; /* DESIGNATOR LENGTH */ | |
331 | off += 2; /* Skip over Reserved Field */ | |
332 | buf[off++] = ((tg_pt_gp_id >> 8) & 0xff); | |
333 | buf[off++] = (tg_pt_gp_id & 0xff); | |
334 | len += 8; /* Header size + Designation descriptor */ | |
335 | /* | |
336 | * Logical Unit Group identifier, see spc4r17 | |
337 | * section 7.7.3.8 | |
338 | */ | |
339 | check_lu_gp: | |
c66ac9db | 340 | lu_gp_mem = dev->dev_alua_lu_gp_mem; |
6708bb27 | 341 | if (!lu_gp_mem) |
c66ac9db NB |
342 | goto check_scsi_name; |
343 | ||
344 | spin_lock(&lu_gp_mem->lu_gp_mem_lock); | |
345 | lu_gp = lu_gp_mem->lu_gp; | |
6708bb27 | 346 | if (!lu_gp) { |
c66ac9db NB |
347 | spin_unlock(&lu_gp_mem->lu_gp_mem_lock); |
348 | goto check_scsi_name; | |
349 | } | |
350 | lu_gp_id = lu_gp->lu_gp_id; | |
351 | spin_unlock(&lu_gp_mem->lu_gp_mem_lock); | |
352 | ||
353 | buf[off++] |= 0x1; /* CODE SET == Binary */ | |
354 | /* DESIGNATOR TYPE == Logical Unit Group identifier */ | |
355 | buf[off++] |= 0x6; | |
356 | off++; /* Skip over Reserved */ | |
357 | buf[off++] = 4; /* DESIGNATOR LENGTH */ | |
358 | off += 2; /* Skip over Reserved Field */ | |
359 | buf[off++] = ((lu_gp_id >> 8) & 0xff); | |
360 | buf[off++] = (lu_gp_id & 0xff); | |
361 | len += 8; /* Header size + Designation descriptor */ | |
362 | /* | |
363 | * SCSI name string designator, see spc4r17 | |
364 | * section 7.7.3.11 | |
365 | * | |
366 | * Get the PROTOCOL IDENTIFIER as defined by spc4r17 | |
367 | * section 7.5.1 Table 362 | |
368 | */ | |
369 | check_scsi_name: | |
e3d6f909 | 370 | scsi_name_len = strlen(tpg->se_tpg_tfo->tpg_get_wwn(tpg)); |
c66ac9db NB |
371 | /* UTF-8 ",t,0x<16-bit TPGT>" + NULL Terminator */ |
372 | scsi_name_len += 10; | |
373 | /* Check for 4-byte padding */ | |
374 | padding = ((-scsi_name_len) & 3); | |
375 | if (padding != 0) | |
376 | scsi_name_len += padding; | |
377 | /* Header size + Designation descriptor */ | |
378 | scsi_name_len += 4; | |
379 | ||
c66ac9db | 380 | buf[off] = |
e3d6f909 | 381 | (tpg->se_tpg_tfo->get_fabric_proto_ident(tpg) << 4); |
c66ac9db NB |
382 | buf[off++] |= 0x3; /* CODE SET == UTF-8 */ |
383 | buf[off] = 0x80; /* Set PIV=1 */ | |
163cd5fa | 384 | /* Set ASSOCIATION == target port: 01b */ |
c66ac9db NB |
385 | buf[off] |= 0x10; |
386 | /* DESIGNATOR TYPE == SCSI name string */ | |
387 | buf[off++] |= 0x8; | |
388 | off += 2; /* Skip over Reserved and length */ | |
389 | /* | |
390 | * SCSI name string identifer containing, $FABRIC_MOD | |
391 | * dependent information. For LIO-Target and iSCSI | |
392 | * Target Port, this means "<iSCSI name>,t,0x<TPGT> in | |
393 | * UTF-8 encoding. | |
394 | */ | |
e3d6f909 | 395 | tpgt = tpg->se_tpg_tfo->tpg_get_tag(tpg); |
c66ac9db | 396 | scsi_name_len = sprintf(&buf[off], "%s,t,0x%04x", |
e3d6f909 | 397 | tpg->se_tpg_tfo->tpg_get_wwn(tpg), tpgt); |
c66ac9db NB |
398 | scsi_name_len += 1 /* Include NULL terminator */; |
399 | /* | |
400 | * The null-terminated, null-padded (see 4.4.2) SCSI | |
401 | * NAME STRING field contains a UTF-8 format string. | |
402 | * The number of bytes in the SCSI NAME STRING field | |
403 | * (i.e., the value in the DESIGNATOR LENGTH field) | |
404 | * shall be no larger than 256 and shall be a multiple | |
405 | * of four. | |
406 | */ | |
407 | if (padding) | |
408 | scsi_name_len += padding; | |
409 | ||
410 | buf[off-1] = scsi_name_len; | |
411 | off += scsi_name_len; | |
412 | /* Header size + Designation descriptor */ | |
413 | len += (scsi_name_len + 4); | |
414 | } | |
c66ac9db NB |
415 | buf[2] = ((len >> 8) & 0xff); |
416 | buf[3] = (len & 0xff); /* Page Length for VPD 0x83 */ | |
417 | return 0; | |
418 | } | |
419 | ||
420 | /* Extended INQUIRY Data VPD Page */ | |
421 | static int | |
422 | target_emulate_evpd_86(struct se_cmd *cmd, unsigned char *buf) | |
423 | { | |
1289a057 | 424 | buf[3] = 0x3c; |
c66ac9db NB |
425 | /* Set HEADSUP, ORDSUP, SIMPSUP */ |
426 | buf[5] = 0x07; | |
427 | ||
428 | /* If WriteCache emulation is enabled, set V_SUP */ | |
5951146d | 429 | if (cmd->se_dev->se_sub_dev->se_dev_attrib.emulate_write_cache > 0) |
c66ac9db NB |
430 | buf[6] = 0x01; |
431 | return 0; | |
432 | } | |
433 | ||
434 | /* Block Limits VPD page */ | |
435 | static int | |
436 | target_emulate_evpd_b0(struct se_cmd *cmd, unsigned char *buf) | |
437 | { | |
5951146d | 438 | struct se_device *dev = cmd->se_dev; |
c66ac9db NB |
439 | int have_tp = 0; |
440 | ||
441 | /* | |
442 | * Following sbc3r22 section 6.5.3 Block Limits VPD page, when | |
443 | * emulate_tpu=1 or emulate_tpws=1 we will be expect a | |
444 | * different page length for Thin Provisioning. | |
445 | */ | |
e3d6f909 | 446 | if (dev->se_sub_dev->se_dev_attrib.emulate_tpu || dev->se_sub_dev->se_dev_attrib.emulate_tpws) |
c66ac9db NB |
447 | have_tp = 1; |
448 | ||
c66ac9db | 449 | buf[0] = dev->transport->get_device_type(dev); |
c66ac9db NB |
450 | buf[3] = have_tp ? 0x3c : 0x10; |
451 | ||
6708bb27 AG |
452 | /* Set WSNZ to 1 */ |
453 | buf[4] = 0x01; | |
454 | ||
c66ac9db NB |
455 | /* |
456 | * Set OPTIMAL TRANSFER LENGTH GRANULARITY | |
457 | */ | |
458 | put_unaligned_be16(1, &buf[6]); | |
459 | ||
460 | /* | |
461 | * Set MAXIMUM TRANSFER LENGTH | |
462 | */ | |
e3d6f909 | 463 | put_unaligned_be32(dev->se_sub_dev->se_dev_attrib.max_sectors, &buf[8]); |
c66ac9db NB |
464 | |
465 | /* | |
466 | * Set OPTIMAL TRANSFER LENGTH | |
467 | */ | |
e3d6f909 | 468 | put_unaligned_be32(dev->se_sub_dev->se_dev_attrib.optimal_sectors, &buf[12]); |
c66ac9db NB |
469 | |
470 | /* | |
d95b8246 | 471 | * Exit now if we don't support TP. |
c66ac9db | 472 | */ |
d95b8246 | 473 | if (!have_tp) |
c66ac9db NB |
474 | return 0; |
475 | ||
476 | /* | |
477 | * Set MAXIMUM UNMAP LBA COUNT | |
478 | */ | |
e3d6f909 | 479 | put_unaligned_be32(dev->se_sub_dev->se_dev_attrib.max_unmap_lba_count, &buf[20]); |
c66ac9db NB |
480 | |
481 | /* | |
482 | * Set MAXIMUM UNMAP BLOCK DESCRIPTOR COUNT | |
483 | */ | |
e3d6f909 | 484 | put_unaligned_be32(dev->se_sub_dev->se_dev_attrib.max_unmap_block_desc_count, |
c66ac9db NB |
485 | &buf[24]); |
486 | ||
487 | /* | |
488 | * Set OPTIMAL UNMAP GRANULARITY | |
489 | */ | |
e3d6f909 | 490 | put_unaligned_be32(dev->se_sub_dev->se_dev_attrib.unmap_granularity, &buf[28]); |
c66ac9db NB |
491 | |
492 | /* | |
493 | * UNMAP GRANULARITY ALIGNMENT | |
494 | */ | |
e3d6f909 | 495 | put_unaligned_be32(dev->se_sub_dev->se_dev_attrib.unmap_granularity_alignment, |
c66ac9db | 496 | &buf[32]); |
e3d6f909 | 497 | if (dev->se_sub_dev->se_dev_attrib.unmap_granularity_alignment != 0) |
c66ac9db NB |
498 | buf[32] |= 0x80; /* Set the UGAVALID bit */ |
499 | ||
500 | return 0; | |
501 | } | |
502 | ||
e22a7f07 RD |
503 | /* Block Device Characteristics VPD page */ |
504 | static int | |
505 | target_emulate_evpd_b1(struct se_cmd *cmd, unsigned char *buf) | |
506 | { | |
507 | struct se_device *dev = cmd->se_dev; | |
508 | ||
509 | buf[0] = dev->transport->get_device_type(dev); | |
510 | buf[3] = 0x3c; | |
d95b8246 | 511 | buf[5] = dev->se_sub_dev->se_dev_attrib.is_nonrot ? 1 : 0; |
e22a7f07 RD |
512 | |
513 | return 0; | |
514 | } | |
515 | ||
c66ac9db NB |
516 | /* Thin Provisioning VPD */ |
517 | static int | |
518 | target_emulate_evpd_b2(struct se_cmd *cmd, unsigned char *buf) | |
519 | { | |
5951146d | 520 | struct se_device *dev = cmd->se_dev; |
c66ac9db NB |
521 | |
522 | /* | |
523 | * From sbc3r22 section 6.5.4 Thin Provisioning VPD page: | |
524 | * | |
525 | * The PAGE LENGTH field is defined in SPC-4. If the DP bit is set to | |
526 | * zero, then the page length shall be set to 0004h. If the DP bit | |
527 | * is set to one, then the page length shall be set to the value | |
528 | * defined in table 162. | |
529 | */ | |
530 | buf[0] = dev->transport->get_device_type(dev); | |
c66ac9db NB |
531 | |
532 | /* | |
533 | * Set Hardcoded length mentioned above for DP=0 | |
534 | */ | |
535 | put_unaligned_be16(0x0004, &buf[2]); | |
536 | ||
537 | /* | |
538 | * The THRESHOLD EXPONENT field indicates the threshold set size in | |
539 | * LBAs as a power of 2 (i.e., the threshold set size is equal to | |
540 | * 2(threshold exponent)). | |
541 | * | |
542 | * Note that this is currently set to 0x00 as mkp says it will be | |
543 | * changing again. We can enable this once it has settled in T10 | |
544 | * and is actually used by Linux/SCSI ML code. | |
545 | */ | |
546 | buf[4] = 0x00; | |
547 | ||
548 | /* | |
549 | * A TPU bit set to one indicates that the device server supports | |
550 | * the UNMAP command (see 5.25). A TPU bit set to zero indicates | |
551 | * that the device server does not support the UNMAP command. | |
552 | */ | |
e3d6f909 | 553 | if (dev->se_sub_dev->se_dev_attrib.emulate_tpu != 0) |
c66ac9db NB |
554 | buf[5] = 0x80; |
555 | ||
556 | /* | |
557 | * A TPWS bit set to one indicates that the device server supports | |
558 | * the use of the WRITE SAME (16) command (see 5.42) to unmap LBAs. | |
559 | * A TPWS bit set to zero indicates that the device server does not | |
560 | * support the use of the WRITE SAME (16) command to unmap LBAs. | |
561 | */ | |
e3d6f909 | 562 | if (dev->se_sub_dev->se_dev_attrib.emulate_tpws != 0) |
c66ac9db NB |
563 | buf[5] |= 0x40; |
564 | ||
565 | return 0; | |
566 | } | |
567 | ||
b2eb705e RD |
568 | static int |
569 | target_emulate_evpd_00(struct se_cmd *cmd, unsigned char *buf); | |
570 | ||
571 | static struct { | |
572 | uint8_t page; | |
573 | int (*emulate)(struct se_cmd *, unsigned char *); | |
574 | } evpd_handlers[] = { | |
575 | { .page = 0x00, .emulate = target_emulate_evpd_00 }, | |
576 | { .page = 0x80, .emulate = target_emulate_evpd_80 }, | |
577 | { .page = 0x83, .emulate = target_emulate_evpd_83 }, | |
578 | { .page = 0x86, .emulate = target_emulate_evpd_86 }, | |
579 | { .page = 0xb0, .emulate = target_emulate_evpd_b0 }, | |
e22a7f07 | 580 | { .page = 0xb1, .emulate = target_emulate_evpd_b1 }, |
b2eb705e RD |
581 | { .page = 0xb2, .emulate = target_emulate_evpd_b2 }, |
582 | }; | |
583 | ||
584 | /* supported vital product data pages */ | |
585 | static int | |
586 | target_emulate_evpd_00(struct se_cmd *cmd, unsigned char *buf) | |
587 | { | |
588 | int p; | |
589 | ||
b2eb705e RD |
590 | /* |
591 | * Only report the INQUIRY EVPD=1 pages after a valid NAA | |
592 | * Registered Extended LUN WWN has been set via ConfigFS | |
593 | * during device creation/restart. | |
594 | */ | |
595 | if (cmd->se_dev->se_sub_dev->su_dev_flags & | |
596 | SDF_EMULATED_VPD_UNIT_SERIAL) { | |
597 | buf[3] = ARRAY_SIZE(evpd_handlers); | |
d95b8246 | 598 | for (p = 0; p < ARRAY_SIZE(evpd_handlers); ++p) |
b2eb705e RD |
599 | buf[p + 4] = evpd_handlers[p].page; |
600 | } | |
601 | ||
602 | return 0; | |
603 | } | |
604 | ||
5bda90c8 | 605 | int target_emulate_inquiry(struct se_task *task) |
c66ac9db | 606 | { |
6ed5a557 | 607 | struct se_cmd *cmd = task->task_se_cmd; |
5951146d | 608 | struct se_device *dev = cmd->se_dev; |
d95b8246 | 609 | unsigned char *buf, *map_buf; |
a1d8b49a | 610 | unsigned char *cdb = cmd->t_task_cdb; |
05d1c7c0 | 611 | int p, ret; |
c66ac9db | 612 | |
d95b8246 RD |
613 | map_buf = transport_kmap_data_sg(cmd); |
614 | /* | |
615 | * If SCF_PASSTHROUGH_SG_TO_MEM_NOALLOC is not set, then we | |
616 | * know we actually allocated a full page. Otherwise, if the | |
617 | * data buffer is too small, allocate a temporary buffer so we | |
618 | * don't have to worry about overruns in all our INQUIRY | |
619 | * emulation handling. | |
620 | */ | |
621 | if (cmd->data_length < SE_INQUIRY_BUF && | |
622 | (cmd->se_cmd_flags & SCF_PASSTHROUGH_SG_TO_MEM_NOALLOC)) { | |
623 | buf = kzalloc(SE_INQUIRY_BUF, GFP_KERNEL); | |
624 | if (!buf) { | |
625 | transport_kunmap_data_sg(cmd); | |
626 | cmd->scsi_sense_reason = TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; | |
627 | return -ENOMEM; | |
628 | } | |
629 | } else { | |
630 | buf = map_buf; | |
631 | } | |
632 | ||
d29a5b6a | 633 | if (!(cdb[1] & 0x1)) { |
bf005355 RD |
634 | if (cdb[2]) { |
635 | pr_err("INQUIRY with EVPD==0 but PAGE CODE=%02x\n", | |
636 | cdb[2]); | |
637 | cmd->scsi_sense_reason = TCM_INVALID_CDB_FIELD; | |
d95b8246 RD |
638 | ret = -EINVAL; |
639 | goto out; | |
bf005355 RD |
640 | } |
641 | ||
d95b8246 | 642 | ret = target_emulate_inquiry_std(cmd, buf); |
d29a5b6a CH |
643 | goto out; |
644 | } | |
c66ac9db | 645 | |
c66ac9db NB |
646 | buf[0] = dev->transport->get_device_type(dev); |
647 | ||
d29a5b6a | 648 | for (p = 0; p < ARRAY_SIZE(evpd_handlers); ++p) { |
b2eb705e RD |
649 | if (cdb[2] == evpd_handlers[p].page) { |
650 | buf[1] = cdb[2]; | |
05d1c7c0 | 651 | ret = evpd_handlers[p].emulate(cmd, buf); |
d95b8246 | 652 | goto out; |
b2eb705e | 653 | } |
d29a5b6a | 654 | } |
c66ac9db | 655 | |
6708bb27 | 656 | pr_err("Unknown VPD Code: 0x%02x\n", cdb[2]); |
bb1acb2e | 657 | cmd->scsi_sense_reason = TCM_INVALID_CDB_FIELD; |
d29a5b6a CH |
658 | ret = -EINVAL; |
659 | ||
d29a5b6a | 660 | out: |
d95b8246 RD |
661 | if (buf != map_buf) { |
662 | memcpy(map_buf, buf, cmd->data_length); | |
663 | kfree(buf); | |
664 | } | |
665 | transport_kunmap_data_sg(cmd); | |
666 | ||
d29a5b6a CH |
667 | if (!ret) { |
668 | task->task_scsi_status = GOOD; | |
669 | transport_complete_task(task, 1); | |
670 | } | |
671 | return ret; | |
c66ac9db NB |
672 | } |
673 | ||
5bda90c8 | 674 | int target_emulate_readcapacity(struct se_task *task) |
c66ac9db | 675 | { |
6ed5a557 | 676 | struct se_cmd *cmd = task->task_se_cmd; |
5951146d | 677 | struct se_device *dev = cmd->se_dev; |
05d1c7c0 | 678 | unsigned char *buf; |
904f0bc4 NB |
679 | unsigned long long blocks_long = dev->transport->get_blocks(dev); |
680 | u32 blocks; | |
681 | ||
682 | if (blocks_long >= 0x00000000ffffffff) | |
683 | blocks = 0xffffffff; | |
684 | else | |
685 | blocks = (u32)blocks_long; | |
c66ac9db | 686 | |
4949314c | 687 | buf = transport_kmap_data_sg(cmd); |
05d1c7c0 | 688 | |
c66ac9db NB |
689 | buf[0] = (blocks >> 24) & 0xff; |
690 | buf[1] = (blocks >> 16) & 0xff; | |
691 | buf[2] = (blocks >> 8) & 0xff; | |
692 | buf[3] = blocks & 0xff; | |
e3d6f909 AG |
693 | buf[4] = (dev->se_sub_dev->se_dev_attrib.block_size >> 24) & 0xff; |
694 | buf[5] = (dev->se_sub_dev->se_dev_attrib.block_size >> 16) & 0xff; | |
695 | buf[6] = (dev->se_sub_dev->se_dev_attrib.block_size >> 8) & 0xff; | |
696 | buf[7] = dev->se_sub_dev->se_dev_attrib.block_size & 0xff; | |
c66ac9db NB |
697 | /* |
698 | * Set max 32-bit blocks to signal SERVICE ACTION READ_CAPACITY_16 | |
699 | */ | |
e3d6f909 | 700 | if (dev->se_sub_dev->se_dev_attrib.emulate_tpu || dev->se_sub_dev->se_dev_attrib.emulate_tpws) |
c66ac9db NB |
701 | put_unaligned_be32(0xFFFFFFFF, &buf[0]); |
702 | ||
4949314c | 703 | transport_kunmap_data_sg(cmd); |
05d1c7c0 | 704 | |
d29a5b6a CH |
705 | task->task_scsi_status = GOOD; |
706 | transport_complete_task(task, 1); | |
c66ac9db NB |
707 | return 0; |
708 | } | |
709 | ||
5bda90c8 | 710 | int target_emulate_readcapacity_16(struct se_task *task) |
c66ac9db | 711 | { |
6ed5a557 | 712 | struct se_cmd *cmd = task->task_se_cmd; |
5951146d | 713 | struct se_device *dev = cmd->se_dev; |
05d1c7c0 | 714 | unsigned char *buf; |
c66ac9db NB |
715 | unsigned long long blocks = dev->transport->get_blocks(dev); |
716 | ||
4949314c | 717 | buf = transport_kmap_data_sg(cmd); |
05d1c7c0 | 718 | |
c66ac9db NB |
719 | buf[0] = (blocks >> 56) & 0xff; |
720 | buf[1] = (blocks >> 48) & 0xff; | |
721 | buf[2] = (blocks >> 40) & 0xff; | |
722 | buf[3] = (blocks >> 32) & 0xff; | |
723 | buf[4] = (blocks >> 24) & 0xff; | |
724 | buf[5] = (blocks >> 16) & 0xff; | |
725 | buf[6] = (blocks >> 8) & 0xff; | |
726 | buf[7] = blocks & 0xff; | |
e3d6f909 AG |
727 | buf[8] = (dev->se_sub_dev->se_dev_attrib.block_size >> 24) & 0xff; |
728 | buf[9] = (dev->se_sub_dev->se_dev_attrib.block_size >> 16) & 0xff; | |
729 | buf[10] = (dev->se_sub_dev->se_dev_attrib.block_size >> 8) & 0xff; | |
730 | buf[11] = dev->se_sub_dev->se_dev_attrib.block_size & 0xff; | |
c66ac9db NB |
731 | /* |
732 | * Set Thin Provisioning Enable bit following sbc3r22 in section | |
733 | * READ CAPACITY (16) byte 14 if emulate_tpu or emulate_tpws is enabled. | |
734 | */ | |
e3d6f909 | 735 | if (dev->se_sub_dev->se_dev_attrib.emulate_tpu || dev->se_sub_dev->se_dev_attrib.emulate_tpws) |
c66ac9db NB |
736 | buf[14] = 0x80; |
737 | ||
4949314c | 738 | transport_kunmap_data_sg(cmd); |
05d1c7c0 | 739 | |
d29a5b6a CH |
740 | task->task_scsi_status = GOOD; |
741 | transport_complete_task(task, 1); | |
c66ac9db NB |
742 | return 0; |
743 | } | |
744 | ||
745 | static int | |
746 | target_modesense_rwrecovery(unsigned char *p) | |
747 | { | |
748 | p[0] = 0x01; | |
749 | p[1] = 0x0a; | |
750 | ||
751 | return 12; | |
752 | } | |
753 | ||
754 | static int | |
755 | target_modesense_control(struct se_device *dev, unsigned char *p) | |
756 | { | |
757 | p[0] = 0x0a; | |
758 | p[1] = 0x0a; | |
759 | p[2] = 2; | |
5de619a3 NB |
760 | /* |
761 | * From spc4r23, 7.4.7 Control mode page | |
762 | * | |
763 | * The QUEUE ALGORITHM MODIFIER field (see table 368) specifies | |
764 | * restrictions on the algorithm used for reordering commands | |
765 | * having the SIMPLE task attribute (see SAM-4). | |
766 | * | |
767 | * Table 368 -- QUEUE ALGORITHM MODIFIER field | |
768 | * Code Description | |
769 | * 0h Restricted reordering | |
770 | * 1h Unrestricted reordering allowed | |
771 | * 2h to 7h Reserved | |
772 | * 8h to Fh Vendor specific | |
773 | * | |
774 | * A value of zero in the QUEUE ALGORITHM MODIFIER field specifies that | |
775 | * the device server shall order the processing sequence of commands | |
776 | * having the SIMPLE task attribute such that data integrity is maintained | |
777 | * for that I_T nexus (i.e., if the transmission of new SCSI transport protocol | |
778 | * requests is halted at any time, the final value of all data observable | |
779 | * on the medium shall be the same as if all the commands had been processed | |
780 | * with the ORDERED task attribute). | |
781 | * | |
782 | * A value of one in the QUEUE ALGORITHM MODIFIER field specifies that the | |
783 | * device server may reorder the processing sequence of commands having the | |
784 | * SIMPLE task attribute in any manner. Any data integrity exposures related to | |
785 | * command sequence order shall be explicitly handled by the application client | |
786 | * through the selection of appropriate ommands and task attributes. | |
787 | */ | |
788 | p[3] = (dev->se_sub_dev->se_dev_attrib.emulate_rest_reord == 1) ? 0x00 : 0x10; | |
c66ac9db NB |
789 | /* |
790 | * From spc4r17, section 7.4.6 Control mode Page | |
791 | * | |
792 | * Unit Attention interlocks control (UN_INTLCK_CTRL) to code 00b | |
793 | * | |
794 | * 00b: The logical unit shall clear any unit attention condition | |
795 | * reported in the same I_T_L_Q nexus transaction as a CHECK CONDITION | |
796 | * status and shall not establish a unit attention condition when a com- | |
797 | * mand is completed with BUSY, TASK SET FULL, or RESERVATION CONFLICT | |
798 | * status. | |
799 | * | |
800 | * 10b: The logical unit shall not clear any unit attention condition | |
801 | * reported in the same I_T_L_Q nexus transaction as a CHECK CONDITION | |
802 | * status and shall not establish a unit attention condition when | |
803 | * a command is completed with BUSY, TASK SET FULL, or RESERVATION | |
804 | * CONFLICT status. | |
805 | * | |
806 | * 11b a The logical unit shall not clear any unit attention condition | |
807 | * reported in the same I_T_L_Q nexus transaction as a CHECK CONDITION | |
808 | * status and shall establish a unit attention condition for the | |
809 | * initiator port associated with the I_T nexus on which the BUSY, | |
810 | * TASK SET FULL, or RESERVATION CONFLICT status is being returned. | |
811 | * Depending on the status, the additional sense code shall be set to | |
812 | * PREVIOUS BUSY STATUS, PREVIOUS TASK SET FULL STATUS, or PREVIOUS | |
813 | * RESERVATION CONFLICT STATUS. Until it is cleared by a REQUEST SENSE | |
814 | * command, a unit attention condition shall be established only once | |
815 | * for a BUSY, TASK SET FULL, or RESERVATION CONFLICT status regardless | |
816 | * to the number of commands completed with one of those status codes. | |
817 | */ | |
e3d6f909 AG |
818 | p[4] = (dev->se_sub_dev->se_dev_attrib.emulate_ua_intlck_ctrl == 2) ? 0x30 : |
819 | (dev->se_sub_dev->se_dev_attrib.emulate_ua_intlck_ctrl == 1) ? 0x20 : 0x00; | |
c66ac9db NB |
820 | /* |
821 | * From spc4r17, section 7.4.6 Control mode Page | |
822 | * | |
823 | * Task Aborted Status (TAS) bit set to zero. | |
824 | * | |
825 | * A task aborted status (TAS) bit set to zero specifies that aborted | |
826 | * tasks shall be terminated by the device server without any response | |
827 | * to the application client. A TAS bit set to one specifies that tasks | |
828 | * aborted by the actions of an I_T nexus other than the I_T nexus on | |
829 | * which the command was received shall be completed with TASK ABORTED | |
830 | * status (see SAM-4). | |
831 | */ | |
e3d6f909 | 832 | p[5] = (dev->se_sub_dev->se_dev_attrib.emulate_tas) ? 0x40 : 0x00; |
c66ac9db NB |
833 | p[8] = 0xff; |
834 | p[9] = 0xff; | |
835 | p[11] = 30; | |
836 | ||
837 | return 12; | |
838 | } | |
839 | ||
840 | static int | |
841 | target_modesense_caching(struct se_device *dev, unsigned char *p) | |
842 | { | |
843 | p[0] = 0x08; | |
844 | p[1] = 0x12; | |
e3d6f909 | 845 | if (dev->se_sub_dev->se_dev_attrib.emulate_write_cache > 0) |
c66ac9db NB |
846 | p[2] = 0x04; /* Write Cache Enable */ |
847 | p[12] = 0x20; /* Disabled Read Ahead */ | |
848 | ||
849 | return 20; | |
850 | } | |
851 | ||
852 | static void | |
853 | target_modesense_write_protect(unsigned char *buf, int type) | |
854 | { | |
855 | /* | |
856 | * I believe that the WP bit (bit 7) in the mode header is the same for | |
857 | * all device types.. | |
858 | */ | |
859 | switch (type) { | |
860 | case TYPE_DISK: | |
861 | case TYPE_TAPE: | |
862 | default: | |
863 | buf[0] |= 0x80; /* WP bit */ | |
864 | break; | |
865 | } | |
866 | } | |
867 | ||
868 | static void | |
869 | target_modesense_dpofua(unsigned char *buf, int type) | |
870 | { | |
871 | switch (type) { | |
872 | case TYPE_DISK: | |
873 | buf[0] |= 0x10; /* DPOFUA bit */ | |
874 | break; | |
875 | default: | |
876 | break; | |
877 | } | |
878 | } | |
879 | ||
5bda90c8 | 880 | int target_emulate_modesense(struct se_task *task) |
c66ac9db | 881 | { |
6ed5a557 | 882 | struct se_cmd *cmd = task->task_se_cmd; |
5951146d | 883 | struct se_device *dev = cmd->se_dev; |
a1d8b49a | 884 | char *cdb = cmd->t_task_cdb; |
05d1c7c0 | 885 | unsigned char *rbuf; |
c66ac9db | 886 | int type = dev->transport->get_device_type(dev); |
6ed5a557 CH |
887 | int ten = (cmd->t_task_cdb[0] == MODE_SENSE_10); |
888 | int offset = ten ? 8 : 4; | |
c66ac9db NB |
889 | int length = 0; |
890 | unsigned char buf[SE_MODE_PAGE_BUF]; | |
891 | ||
892 | memset(buf, 0, SE_MODE_PAGE_BUF); | |
893 | ||
894 | switch (cdb[2] & 0x3f) { | |
895 | case 0x01: | |
896 | length = target_modesense_rwrecovery(&buf[offset]); | |
897 | break; | |
898 | case 0x08: | |
899 | length = target_modesense_caching(dev, &buf[offset]); | |
900 | break; | |
901 | case 0x0a: | |
902 | length = target_modesense_control(dev, &buf[offset]); | |
903 | break; | |
904 | case 0x3f: | |
905 | length = target_modesense_rwrecovery(&buf[offset]); | |
906 | length += target_modesense_caching(dev, &buf[offset+length]); | |
907 | length += target_modesense_control(dev, &buf[offset+length]); | |
908 | break; | |
909 | default: | |
f15ea578 RD |
910 | pr_err("MODE SENSE: unimplemented page/subpage: 0x%02x/0x%02x\n", |
911 | cdb[2] & 0x3f, cdb[3]); | |
03e98c9e NB |
912 | cmd->scsi_sense_reason = TCM_UNKNOWN_MODE_PAGE; |
913 | return -EINVAL; | |
c66ac9db NB |
914 | } |
915 | offset += length; | |
916 | ||
917 | if (ten) { | |
918 | offset -= 2; | |
919 | buf[0] = (offset >> 8) & 0xff; | |
920 | buf[1] = offset & 0xff; | |
921 | ||
e3d6f909 | 922 | if ((cmd->se_lun->lun_access & TRANSPORT_LUNFLAGS_READ_ONLY) || |
c66ac9db NB |
923 | (cmd->se_deve && |
924 | (cmd->se_deve->lun_flags & TRANSPORT_LUNFLAGS_READ_ONLY))) | |
925 | target_modesense_write_protect(&buf[3], type); | |
926 | ||
e3d6f909 AG |
927 | if ((dev->se_sub_dev->se_dev_attrib.emulate_write_cache > 0) && |
928 | (dev->se_sub_dev->se_dev_attrib.emulate_fua_write > 0)) | |
c66ac9db NB |
929 | target_modesense_dpofua(&buf[3], type); |
930 | ||
931 | if ((offset + 2) > cmd->data_length) | |
932 | offset = cmd->data_length; | |
933 | ||
934 | } else { | |
935 | offset -= 1; | |
936 | buf[0] = offset & 0xff; | |
937 | ||
e3d6f909 | 938 | if ((cmd->se_lun->lun_access & TRANSPORT_LUNFLAGS_READ_ONLY) || |
c66ac9db NB |
939 | (cmd->se_deve && |
940 | (cmd->se_deve->lun_flags & TRANSPORT_LUNFLAGS_READ_ONLY))) | |
941 | target_modesense_write_protect(&buf[2], type); | |
942 | ||
e3d6f909 AG |
943 | if ((dev->se_sub_dev->se_dev_attrib.emulate_write_cache > 0) && |
944 | (dev->se_sub_dev->se_dev_attrib.emulate_fua_write > 0)) | |
c66ac9db NB |
945 | target_modesense_dpofua(&buf[2], type); |
946 | ||
947 | if ((offset + 1) > cmd->data_length) | |
948 | offset = cmd->data_length; | |
949 | } | |
05d1c7c0 | 950 | |
4949314c | 951 | rbuf = transport_kmap_data_sg(cmd); |
c66ac9db | 952 | memcpy(rbuf, buf, offset); |
4949314c | 953 | transport_kunmap_data_sg(cmd); |
c66ac9db | 954 | |
d29a5b6a CH |
955 | task->task_scsi_status = GOOD; |
956 | transport_complete_task(task, 1); | |
c66ac9db NB |
957 | return 0; |
958 | } | |
959 | ||
5bda90c8 | 960 | int target_emulate_request_sense(struct se_task *task) |
c66ac9db | 961 | { |
6ed5a557 | 962 | struct se_cmd *cmd = task->task_se_cmd; |
a1d8b49a | 963 | unsigned char *cdb = cmd->t_task_cdb; |
05d1c7c0 | 964 | unsigned char *buf; |
c66ac9db | 965 | u8 ua_asc = 0, ua_ascq = 0; |
05d1c7c0 | 966 | int err = 0; |
c66ac9db NB |
967 | |
968 | if (cdb[1] & 0x01) { | |
6708bb27 | 969 | pr_err("REQUEST_SENSE description emulation not" |
c66ac9db | 970 | " supported\n"); |
03e98c9e NB |
971 | cmd->scsi_sense_reason = TCM_INVALID_CDB_FIELD; |
972 | return -ENOSYS; | |
c66ac9db | 973 | } |
05d1c7c0 | 974 | |
4949314c | 975 | buf = transport_kmap_data_sg(cmd); |
05d1c7c0 | 976 | |
6708bb27 | 977 | if (!core_scsi3_ua_clear_for_request_sense(cmd, &ua_asc, &ua_ascq)) { |
c66ac9db NB |
978 | /* |
979 | * CURRENT ERROR, UNIT ATTENTION | |
980 | */ | |
981 | buf[0] = 0x70; | |
982 | buf[SPC_SENSE_KEY_OFFSET] = UNIT_ATTENTION; | |
95fe1ee4 SAS |
983 | |
984 | if (cmd->data_length < 18) { | |
c66ac9db | 985 | buf[7] = 0x00; |
05d1c7c0 AG |
986 | err = -EINVAL; |
987 | goto end; | |
c66ac9db NB |
988 | } |
989 | /* | |
990 | * The Additional Sense Code (ASC) from the UNIT ATTENTION | |
991 | */ | |
992 | buf[SPC_ASC_KEY_OFFSET] = ua_asc; | |
993 | buf[SPC_ASCQ_KEY_OFFSET] = ua_ascq; | |
994 | buf[7] = 0x0A; | |
995 | } else { | |
996 | /* | |
997 | * CURRENT ERROR, NO SENSE | |
998 | */ | |
999 | buf[0] = 0x70; | |
1000 | buf[SPC_SENSE_KEY_OFFSET] = NO_SENSE; | |
95fe1ee4 SAS |
1001 | |
1002 | if (cmd->data_length < 18) { | |
c66ac9db | 1003 | buf[7] = 0x00; |
05d1c7c0 AG |
1004 | err = -EINVAL; |
1005 | goto end; | |
c66ac9db NB |
1006 | } |
1007 | /* | |
1008 | * NO ADDITIONAL SENSE INFORMATION | |
1009 | */ | |
1010 | buf[SPC_ASC_KEY_OFFSET] = 0x00; | |
1011 | buf[7] = 0x0A; | |
1012 | } | |
1013 | ||
05d1c7c0 | 1014 | end: |
4949314c | 1015 | transport_kunmap_data_sg(cmd); |
d29a5b6a CH |
1016 | task->task_scsi_status = GOOD; |
1017 | transport_complete_task(task, 1); | |
c66ac9db NB |
1018 | return 0; |
1019 | } | |
1020 | ||
1021 | /* | |
1022 | * Used for TCM/IBLOCK and TCM/FILEIO for block/blk-lib.c level discard support. | |
1023 | * Note this is not used for TCM/pSCSI passthrough | |
1024 | */ | |
5bda90c8 | 1025 | int target_emulate_unmap(struct se_task *task) |
c66ac9db | 1026 | { |
e3d6f909 | 1027 | struct se_cmd *cmd = task->task_se_cmd; |
5951146d | 1028 | struct se_device *dev = cmd->se_dev; |
05d1c7c0 | 1029 | unsigned char *buf, *ptr = NULL; |
a1d8b49a | 1030 | unsigned char *cdb = &cmd->t_task_cdb[0]; |
c66ac9db NB |
1031 | sector_t lba; |
1032 | unsigned int size = cmd->data_length, range; | |
05d1c7c0 | 1033 | int ret = 0, offset; |
c66ac9db NB |
1034 | unsigned short dl, bd_dl; |
1035 | ||
6ed5a557 CH |
1036 | if (!dev->transport->do_discard) { |
1037 | pr_err("UNMAP emulation not supported for: %s\n", | |
1038 | dev->transport->name); | |
03e98c9e NB |
1039 | cmd->scsi_sense_reason = TCM_UNSUPPORTED_SCSI_OPCODE; |
1040 | return -ENOSYS; | |
6ed5a557 CH |
1041 | } |
1042 | ||
c66ac9db NB |
1043 | /* First UNMAP block descriptor starts at 8 byte offset */ |
1044 | offset = 8; | |
1045 | size -= 8; | |
1046 | dl = get_unaligned_be16(&cdb[0]); | |
1047 | bd_dl = get_unaligned_be16(&cdb[2]); | |
05d1c7c0 | 1048 | |
4949314c | 1049 | buf = transport_kmap_data_sg(cmd); |
05d1c7c0 | 1050 | |
c66ac9db | 1051 | ptr = &buf[offset]; |
6708bb27 | 1052 | pr_debug("UNMAP: Sub: %s Using dl: %hu bd_dl: %hu size: %hu" |
c66ac9db NB |
1053 | " ptr: %p\n", dev->transport->name, dl, bd_dl, size, ptr); |
1054 | ||
1055 | while (size) { | |
1056 | lba = get_unaligned_be64(&ptr[0]); | |
1057 | range = get_unaligned_be32(&ptr[8]); | |
6708bb27 | 1058 | pr_debug("UNMAP: Using lba: %llu and range: %u\n", |
c66ac9db NB |
1059 | (unsigned long long)lba, range); |
1060 | ||
1061 | ret = dev->transport->do_discard(dev, lba, range); | |
1062 | if (ret < 0) { | |
6708bb27 | 1063 | pr_err("blkdev_issue_discard() failed: %d\n", |
c66ac9db | 1064 | ret); |
05d1c7c0 | 1065 | goto err; |
c66ac9db NB |
1066 | } |
1067 | ||
1068 | ptr += 16; | |
1069 | size -= 16; | |
1070 | } | |
1071 | ||
05d1c7c0 | 1072 | err: |
4949314c | 1073 | transport_kunmap_data_sg(cmd); |
d29a5b6a CH |
1074 | if (!ret) { |
1075 | task->task_scsi_status = GOOD; | |
1076 | transport_complete_task(task, 1); | |
1077 | } | |
05d1c7c0 | 1078 | return ret; |
c66ac9db NB |
1079 | } |
1080 | ||
1081 | /* | |
1082 | * Used for TCM/IBLOCK and TCM/FILEIO for block/blk-lib.c level discard support. | |
1083 | * Note this is not used for TCM/pSCSI passthrough | |
1084 | */ | |
5bda90c8 | 1085 | int target_emulate_write_same(struct se_task *task) |
c66ac9db | 1086 | { |
e3d6f909 | 1087 | struct se_cmd *cmd = task->task_se_cmd; |
5951146d | 1088 | struct se_device *dev = cmd->se_dev; |
a1d8b49a AG |
1089 | sector_t range; |
1090 | sector_t lba = cmd->t_task_lba; | |
6ed5a557 | 1091 | u32 num_blocks; |
c66ac9db | 1092 | int ret; |
6ed5a557 CH |
1093 | |
1094 | if (!dev->transport->do_discard) { | |
1095 | pr_err("WRITE_SAME emulation not supported" | |
1096 | " for: %s\n", dev->transport->name); | |
03e98c9e NB |
1097 | cmd->scsi_sense_reason = TCM_UNSUPPORTED_SCSI_OPCODE; |
1098 | return -ENOSYS; | |
6ed5a557 CH |
1099 | } |
1100 | ||
1101 | if (cmd->t_task_cdb[0] == WRITE_SAME) | |
1102 | num_blocks = get_unaligned_be16(&cmd->t_task_cdb[7]); | |
1103 | else if (cmd->t_task_cdb[0] == WRITE_SAME_16) | |
1104 | num_blocks = get_unaligned_be32(&cmd->t_task_cdb[10]); | |
1105 | else /* WRITE_SAME_32 via VARIABLE_LENGTH_CMD */ | |
1106 | num_blocks = get_unaligned_be32(&cmd->t_task_cdb[28]); | |
1107 | ||
dd3a5ad8 | 1108 | /* |
706d5860 NB |
1109 | * Use the explicit range when non zero is supplied, otherwise calculate |
1110 | * the remaining range based on ->get_blocks() - starting LBA. | |
dd3a5ad8 | 1111 | */ |
dd3a5ad8 NB |
1112 | if (num_blocks != 0) |
1113 | range = num_blocks; | |
1114 | else | |
1115 | range = (dev->transport->get_blocks(dev) - lba); | |
c66ac9db | 1116 | |
6708bb27 | 1117 | pr_debug("WRITE_SAME UNMAP: LBA: %llu Range: %llu\n", |
dd3a5ad8 | 1118 | (unsigned long long)lba, (unsigned long long)range); |
c66ac9db NB |
1119 | |
1120 | ret = dev->transport->do_discard(dev, lba, range); | |
1121 | if (ret < 0) { | |
6708bb27 | 1122 | pr_debug("blkdev_issue_discard() failed for WRITE_SAME\n"); |
e3d6f909 | 1123 | return ret; |
c66ac9db NB |
1124 | } |
1125 | ||
d29a5b6a CH |
1126 | task->task_scsi_status = GOOD; |
1127 | transport_complete_task(task, 1); | |
c66ac9db NB |
1128 | return 0; |
1129 | } | |
1130 | ||
5bda90c8 | 1131 | int target_emulate_synchronize_cache(struct se_task *task) |
6ed5a557 CH |
1132 | { |
1133 | struct se_device *dev = task->task_se_cmd->se_dev; | |
03e98c9e | 1134 | struct se_cmd *cmd = task->task_se_cmd; |
6ed5a557 CH |
1135 | |
1136 | if (!dev->transport->do_sync_cache) { | |
1137 | pr_err("SYNCHRONIZE_CACHE emulation not supported" | |
1138 | " for: %s\n", dev->transport->name); | |
03e98c9e NB |
1139 | cmd->scsi_sense_reason = TCM_UNSUPPORTED_SCSI_OPCODE; |
1140 | return -ENOSYS; | |
6ed5a557 CH |
1141 | } |
1142 | ||
1143 | dev->transport->do_sync_cache(task); | |
1144 | return 0; | |
1145 | } | |
1146 | ||
5bda90c8 | 1147 | int target_emulate_noop(struct se_task *task) |
d29a5b6a CH |
1148 | { |
1149 | task->task_scsi_status = GOOD; | |
1150 | transport_complete_task(task, 1); | |
1151 | return 0; | |
1152 | } | |
1153 | ||
485fd0d1 CH |
1154 | /* |
1155 | * Write a CDB into @cdb that is based on the one the intiator sent us, | |
1156 | * but updated to only cover the sectors that the current task handles. | |
1157 | */ | |
1158 | void target_get_task_cdb(struct se_task *task, unsigned char *cdb) | |
1159 | { | |
1160 | struct se_cmd *cmd = task->task_se_cmd; | |
b937d270 | 1161 | unsigned int cdb_len = scsi_command_size(cmd->t_task_cdb); |
485fd0d1 | 1162 | |
b937d270 | 1163 | memcpy(cdb, cmd->t_task_cdb, cdb_len); |
485fd0d1 | 1164 | if (cmd->se_cmd_flags & SCF_SCSI_DATA_SG_IO_CDB) { |
b937d270 CH |
1165 | unsigned long long lba = task->task_lba; |
1166 | u32 sectors = task->task_sectors; | |
1167 | ||
1168 | switch (cdb_len) { | |
1169 | case 6: | |
1170 | /* 21-bit LBA and 8-bit sectors */ | |
1171 | cdb[1] = (lba >> 16) & 0x1f; | |
1172 | cdb[2] = (lba >> 8) & 0xff; | |
1173 | cdb[3] = lba & 0xff; | |
1174 | cdb[4] = sectors & 0xff; | |
1175 | break; | |
1176 | case 10: | |
1177 | /* 32-bit LBA and 16-bit sectors */ | |
1178 | put_unaligned_be32(lba, &cdb[2]); | |
1179 | put_unaligned_be16(sectors, &cdb[7]); | |
1180 | break; | |
1181 | case 12: | |
1182 | /* 32-bit LBA and 32-bit sectors */ | |
1183 | put_unaligned_be32(lba, &cdb[2]); | |
1184 | put_unaligned_be32(sectors, &cdb[6]); | |
1185 | break; | |
1186 | case 16: | |
1187 | /* 64-bit LBA and 32-bit sectors */ | |
1188 | put_unaligned_be64(lba, &cdb[2]); | |
1189 | put_unaligned_be32(sectors, &cdb[10]); | |
1190 | break; | |
1191 | case 32: | |
1192 | /* 64-bit LBA and 32-bit sectors, extended CDB */ | |
1193 | put_unaligned_be64(lba, &cdb[12]); | |
1194 | put_unaligned_be32(sectors, &cdb[28]); | |
1195 | break; | |
1196 | default: | |
1197 | BUG(); | |
1198 | } | |
485fd0d1 CH |
1199 | } |
1200 | } | |
1201 | EXPORT_SYMBOL(target_get_task_cdb); |