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; |
05d1c7c0 | 73 | |
089461dd RD |
74 | /* Set RMB (removable media) for tape devices */ |
75 | if (dev->transport->get_device_type(dev) == TYPE_TAPE) | |
76 | buf[1] = 0x80; | |
77 | ||
c66ac9db NB |
78 | buf[2] = dev->transport->get_device_rev(dev); |
79 | ||
ce136176 RD |
80 | /* |
81 | * NORMACA and HISUP = 0, RESPONSE DATA FORMAT = 2 | |
82 | * | |
83 | * SPC4 says: | |
84 | * A RESPONSE DATA FORMAT field set to 2h indicates that the | |
85 | * standard INQUIRY data is in the format defined in this | |
86 | * standard. Response data format values less than 2h are | |
87 | * obsolete. Response data format values greater than 2h are | |
88 | * reserved. | |
89 | */ | |
90 | buf[3] = 2; | |
91 | ||
c66ac9db NB |
92 | /* |
93 | * Enable SCCS and TPGS fields for Emulated ALUA | |
94 | */ | |
e3d6f909 | 95 | if (dev->se_sub_dev->t10_alua.alua_type == SPC3_ALUA_EMULATED) |
c66ac9db NB |
96 | target_fill_alua_data(lun->lun_sep, buf); |
97 | ||
effc6cc8 | 98 | buf[7] = 0x2; /* CmdQue=1 */ |
c66ac9db | 99 | |
8359cf43 JE |
100 | snprintf(&buf[8], 8, "LIO-ORG"); |
101 | snprintf(&buf[16], 16, "%s", dev->se_sub_dev->t10_wwn.model); | |
102 | snprintf(&buf[32], 4, "%s", dev->se_sub_dev->t10_wwn.revision); | |
c66ac9db | 103 | buf[4] = 31; /* Set additional length to 31 */ |
05d1c7c0 | 104 | |
c66ac9db NB |
105 | return 0; |
106 | } | |
107 | ||
c66ac9db NB |
108 | /* unit serial number */ |
109 | static int | |
110 | target_emulate_evpd_80(struct se_cmd *cmd, unsigned char *buf) | |
111 | { | |
5951146d | 112 | struct se_device *dev = cmd->se_dev; |
c66ac9db NB |
113 | u16 len = 0; |
114 | ||
c66ac9db NB |
115 | if (dev->se_sub_dev->su_dev_flags & |
116 | SDF_EMULATED_VPD_UNIT_SERIAL) { | |
117 | u32 unit_serial_len; | |
118 | ||
8359cf43 | 119 | unit_serial_len = strlen(dev->se_sub_dev->t10_wwn.unit_serial); |
c66ac9db NB |
120 | unit_serial_len++; /* For NULL Terminator */ |
121 | ||
8359cf43 JE |
122 | len += sprintf(&buf[4], "%s", |
123 | dev->se_sub_dev->t10_wwn.unit_serial); | |
c66ac9db NB |
124 | len++; /* Extra Byte for NULL Terminator */ |
125 | buf[3] = len; | |
126 | } | |
127 | return 0; | |
128 | } | |
129 | ||
784eb99e | 130 | static void |
b6b4e61f | 131 | target_parse_naa_6h_vendor_specific(struct se_device *dev, unsigned char *buf) |
784eb99e NB |
132 | { |
133 | unsigned char *p = &dev->se_sub_dev->t10_wwn.unit_serial[0]; | |
b6b4e61f AS |
134 | int cnt; |
135 | bool next = true; | |
136 | ||
784eb99e NB |
137 | /* |
138 | * Generate up to 36 bits of VENDOR SPECIFIC IDENTIFIER starting on | |
139 | * byte 3 bit 3-0 for NAA IEEE Registered Extended DESIGNATOR field | |
140 | * format, followed by 64 bits of VENDOR SPECIFIC IDENTIFIER EXTENSION | |
141 | * to complete the payload. These are based from VPD=0x80 PRODUCT SERIAL | |
142 | * NUMBER set via vpd_unit_serial in target_core_configfs.c to ensure | |
143 | * per device uniqeness. | |
144 | */ | |
b6b4e61f AS |
145 | for (cnt = 0; *p && cnt < 13; p++) { |
146 | int val = hex_to_bin(*p); | |
147 | ||
148 | if (val < 0) | |
784eb99e | 149 | continue; |
b6b4e61f AS |
150 | |
151 | if (next) { | |
152 | next = false; | |
153 | buf[cnt++] |= val; | |
784eb99e | 154 | } else { |
b6b4e61f AS |
155 | next = true; |
156 | buf[cnt] = val << 4; | |
784eb99e NB |
157 | } |
158 | } | |
159 | } | |
160 | ||
c66ac9db NB |
161 | /* |
162 | * Device identification VPD, for a complete list of | |
163 | * DESIGNATOR TYPEs see spc4r17 Table 459. | |
164 | */ | |
165 | static int | |
166 | target_emulate_evpd_83(struct se_cmd *cmd, unsigned char *buf) | |
167 | { | |
5951146d | 168 | struct se_device *dev = cmd->se_dev; |
e3d6f909 | 169 | struct se_lun *lun = cmd->se_lun; |
c66ac9db NB |
170 | struct se_port *port = NULL; |
171 | struct se_portal_group *tpg = NULL; | |
172 | struct t10_alua_lu_gp_member *lu_gp_mem; | |
173 | struct t10_alua_tg_pt_gp *tg_pt_gp; | |
174 | struct t10_alua_tg_pt_gp_member *tg_pt_gp_mem; | |
e3d6f909 | 175 | unsigned char *prod = &dev->se_sub_dev->t10_wwn.model[0]; |
c66ac9db NB |
176 | u32 prod_len; |
177 | u32 unit_serial_len, off = 0; | |
c66ac9db NB |
178 | u16 len = 0, id_len; |
179 | ||
c66ac9db NB |
180 | off = 4; |
181 | ||
182 | /* | |
183 | * NAA IEEE Registered Extended Assigned designator format, see | |
184 | * spc4r17 section 7.7.3.6.5 | |
185 | * | |
186 | * We depend upon a target_core_mod/ConfigFS provided | |
187 | * /sys/kernel/config/target/core/$HBA/$DEV/wwn/vpd_unit_serial | |
188 | * value in order to return the NAA id. | |
189 | */ | |
190 | if (!(dev->se_sub_dev->su_dev_flags & SDF_EMULATED_VPD_UNIT_SERIAL)) | |
191 | goto check_t10_vend_desc; | |
192 | ||
c66ac9db NB |
193 | /* CODE SET == Binary */ |
194 | buf[off++] = 0x1; | |
195 | ||
163cd5fa | 196 | /* Set ASSOCIATION == addressed logical unit: 0)b */ |
c66ac9db NB |
197 | buf[off] = 0x00; |
198 | ||
199 | /* Identifier/Designator type == NAA identifier */ | |
163cd5fa | 200 | buf[off++] |= 0x3; |
c66ac9db NB |
201 | off++; |
202 | ||
203 | /* Identifier/Designator length */ | |
204 | buf[off++] = 0x10; | |
205 | ||
206 | /* | |
207 | * Start NAA IEEE Registered Extended Identifier/Designator | |
208 | */ | |
209 | buf[off++] = (0x6 << 4); | |
210 | ||
211 | /* | |
212 | * Use OpenFabrics IEEE Company ID: 00 14 05 | |
213 | */ | |
214 | buf[off++] = 0x01; | |
215 | buf[off++] = 0x40; | |
216 | buf[off] = (0x5 << 4); | |
217 | ||
218 | /* | |
219 | * Return ConfigFS Unit Serial Number information for | |
220 | * VENDOR_SPECIFIC_IDENTIFIER and | |
221 | * VENDOR_SPECIFIC_IDENTIFIER_EXTENTION | |
222 | */ | |
784eb99e | 223 | target_parse_naa_6h_vendor_specific(dev, &buf[off]); |
11650b85 | 224 | |
c66ac9db NB |
225 | len = 20; |
226 | off = (len + 4); | |
227 | ||
228 | check_t10_vend_desc: | |
229 | /* | |
230 | * T10 Vendor Identifier Page, see spc4r17 section 7.7.3.4 | |
231 | */ | |
232 | id_len = 8; /* For Vendor field */ | |
233 | prod_len = 4; /* For VPD Header */ | |
234 | prod_len += 8; /* For Vendor field */ | |
235 | prod_len += strlen(prod); | |
236 | prod_len++; /* For : */ | |
237 | ||
238 | if (dev->se_sub_dev->su_dev_flags & | |
239 | SDF_EMULATED_VPD_UNIT_SERIAL) { | |
240 | unit_serial_len = | |
e3d6f909 | 241 | strlen(&dev->se_sub_dev->t10_wwn.unit_serial[0]); |
c66ac9db NB |
242 | unit_serial_len++; /* For NULL Terminator */ |
243 | ||
8359cf43 | 244 | id_len += sprintf(&buf[off+12], "%s:%s", prod, |
e3d6f909 | 245 | &dev->se_sub_dev->t10_wwn.unit_serial[0]); |
c66ac9db NB |
246 | } |
247 | buf[off] = 0x2; /* ASCII */ | |
248 | buf[off+1] = 0x1; /* T10 Vendor ID */ | |
249 | buf[off+2] = 0x0; | |
8359cf43 | 250 | memcpy(&buf[off+4], "LIO-ORG", 8); |
c66ac9db NB |
251 | /* Extra Byte for NULL Terminator */ |
252 | id_len++; | |
253 | /* Identifier Length */ | |
254 | buf[off+3] = id_len; | |
255 | /* Header size for Designation descriptor */ | |
256 | len += (id_len + 4); | |
257 | off += (id_len + 4); | |
258 | /* | |
259 | * struct se_port is only set for INQUIRY VPD=1 through $FABRIC_MOD | |
260 | */ | |
c66ac9db NB |
261 | port = lun->lun_sep; |
262 | if (port) { | |
263 | struct t10_alua_lu_gp *lu_gp; | |
264 | u32 padding, scsi_name_len; | |
265 | u16 lu_gp_id = 0; | |
266 | u16 tg_pt_gp_id = 0; | |
267 | u16 tpgt; | |
268 | ||
269 | tpg = port->sep_tpg; | |
270 | /* | |
271 | * Relative target port identifer, see spc4r17 | |
272 | * section 7.7.3.7 | |
273 | * | |
274 | * Get the PROTOCOL IDENTIFIER as defined by spc4r17 | |
275 | * section 7.5.1 Table 362 | |
276 | */ | |
c66ac9db | 277 | buf[off] = |
e3d6f909 | 278 | (tpg->se_tpg_tfo->get_fabric_proto_ident(tpg) << 4); |
c66ac9db NB |
279 | buf[off++] |= 0x1; /* CODE SET == Binary */ |
280 | buf[off] = 0x80; /* Set PIV=1 */ | |
163cd5fa | 281 | /* Set ASSOCIATION == target port: 01b */ |
c66ac9db NB |
282 | buf[off] |= 0x10; |
283 | /* DESIGNATOR TYPE == Relative target port identifer */ | |
284 | buf[off++] |= 0x4; | |
285 | off++; /* Skip over Reserved */ | |
286 | buf[off++] = 4; /* DESIGNATOR LENGTH */ | |
287 | /* Skip over Obsolete field in RTPI payload | |
288 | * in Table 472 */ | |
289 | off += 2; | |
290 | buf[off++] = ((port->sep_rtpi >> 8) & 0xff); | |
291 | buf[off++] = (port->sep_rtpi & 0xff); | |
292 | len += 8; /* Header size + Designation descriptor */ | |
293 | /* | |
294 | * Target port group identifier, see spc4r17 | |
295 | * section 7.7.3.8 | |
296 | * | |
297 | * Get the PROTOCOL IDENTIFIER as defined by spc4r17 | |
298 | * section 7.5.1 Table 362 | |
299 | */ | |
e3d6f909 | 300 | if (dev->se_sub_dev->t10_alua.alua_type != |
c66ac9db NB |
301 | SPC3_ALUA_EMULATED) |
302 | goto check_scsi_name; | |
303 | ||
c66ac9db NB |
304 | tg_pt_gp_mem = port->sep_alua_tg_pt_gp_mem; |
305 | if (!tg_pt_gp_mem) | |
306 | goto check_lu_gp; | |
307 | ||
308 | spin_lock(&tg_pt_gp_mem->tg_pt_gp_mem_lock); | |
309 | tg_pt_gp = tg_pt_gp_mem->tg_pt_gp; | |
6708bb27 | 310 | if (!tg_pt_gp) { |
c66ac9db NB |
311 | spin_unlock(&tg_pt_gp_mem->tg_pt_gp_mem_lock); |
312 | goto check_lu_gp; | |
313 | } | |
314 | tg_pt_gp_id = tg_pt_gp->tg_pt_gp_id; | |
315 | spin_unlock(&tg_pt_gp_mem->tg_pt_gp_mem_lock); | |
316 | ||
317 | buf[off] = | |
e3d6f909 | 318 | (tpg->se_tpg_tfo->get_fabric_proto_ident(tpg) << 4); |
c66ac9db NB |
319 | buf[off++] |= 0x1; /* CODE SET == Binary */ |
320 | buf[off] = 0x80; /* Set PIV=1 */ | |
163cd5fa | 321 | /* Set ASSOCIATION == target port: 01b */ |
c66ac9db NB |
322 | buf[off] |= 0x10; |
323 | /* DESIGNATOR TYPE == Target port group identifier */ | |
324 | buf[off++] |= 0x5; | |
325 | off++; /* Skip over Reserved */ | |
326 | buf[off++] = 4; /* DESIGNATOR LENGTH */ | |
327 | off += 2; /* Skip over Reserved Field */ | |
328 | buf[off++] = ((tg_pt_gp_id >> 8) & 0xff); | |
329 | buf[off++] = (tg_pt_gp_id & 0xff); | |
330 | len += 8; /* Header size + Designation descriptor */ | |
331 | /* | |
332 | * Logical Unit Group identifier, see spc4r17 | |
333 | * section 7.7.3.8 | |
334 | */ | |
335 | check_lu_gp: | |
c66ac9db | 336 | lu_gp_mem = dev->dev_alua_lu_gp_mem; |
6708bb27 | 337 | if (!lu_gp_mem) |
c66ac9db NB |
338 | goto check_scsi_name; |
339 | ||
340 | spin_lock(&lu_gp_mem->lu_gp_mem_lock); | |
341 | lu_gp = lu_gp_mem->lu_gp; | |
6708bb27 | 342 | if (!lu_gp) { |
c66ac9db NB |
343 | spin_unlock(&lu_gp_mem->lu_gp_mem_lock); |
344 | goto check_scsi_name; | |
345 | } | |
346 | lu_gp_id = lu_gp->lu_gp_id; | |
347 | spin_unlock(&lu_gp_mem->lu_gp_mem_lock); | |
348 | ||
349 | buf[off++] |= 0x1; /* CODE SET == Binary */ | |
350 | /* DESIGNATOR TYPE == Logical Unit Group identifier */ | |
351 | buf[off++] |= 0x6; | |
352 | off++; /* Skip over Reserved */ | |
353 | buf[off++] = 4; /* DESIGNATOR LENGTH */ | |
354 | off += 2; /* Skip over Reserved Field */ | |
355 | buf[off++] = ((lu_gp_id >> 8) & 0xff); | |
356 | buf[off++] = (lu_gp_id & 0xff); | |
357 | len += 8; /* Header size + Designation descriptor */ | |
358 | /* | |
359 | * SCSI name string designator, see spc4r17 | |
360 | * section 7.7.3.11 | |
361 | * | |
362 | * Get the PROTOCOL IDENTIFIER as defined by spc4r17 | |
363 | * section 7.5.1 Table 362 | |
364 | */ | |
365 | check_scsi_name: | |
e3d6f909 | 366 | scsi_name_len = strlen(tpg->se_tpg_tfo->tpg_get_wwn(tpg)); |
c66ac9db NB |
367 | /* UTF-8 ",t,0x<16-bit TPGT>" + NULL Terminator */ |
368 | scsi_name_len += 10; | |
369 | /* Check for 4-byte padding */ | |
370 | padding = ((-scsi_name_len) & 3); | |
371 | if (padding != 0) | |
372 | scsi_name_len += padding; | |
373 | /* Header size + Designation descriptor */ | |
374 | scsi_name_len += 4; | |
375 | ||
c66ac9db | 376 | buf[off] = |
e3d6f909 | 377 | (tpg->se_tpg_tfo->get_fabric_proto_ident(tpg) << 4); |
c66ac9db NB |
378 | buf[off++] |= 0x3; /* CODE SET == UTF-8 */ |
379 | buf[off] = 0x80; /* Set PIV=1 */ | |
163cd5fa | 380 | /* Set ASSOCIATION == target port: 01b */ |
c66ac9db NB |
381 | buf[off] |= 0x10; |
382 | /* DESIGNATOR TYPE == SCSI name string */ | |
383 | buf[off++] |= 0x8; | |
384 | off += 2; /* Skip over Reserved and length */ | |
385 | /* | |
386 | * SCSI name string identifer containing, $FABRIC_MOD | |
387 | * dependent information. For LIO-Target and iSCSI | |
388 | * Target Port, this means "<iSCSI name>,t,0x<TPGT> in | |
389 | * UTF-8 encoding. | |
390 | */ | |
e3d6f909 | 391 | tpgt = tpg->se_tpg_tfo->tpg_get_tag(tpg); |
c66ac9db | 392 | scsi_name_len = sprintf(&buf[off], "%s,t,0x%04x", |
e3d6f909 | 393 | tpg->se_tpg_tfo->tpg_get_wwn(tpg), tpgt); |
c66ac9db NB |
394 | scsi_name_len += 1 /* Include NULL terminator */; |
395 | /* | |
396 | * The null-terminated, null-padded (see 4.4.2) SCSI | |
397 | * NAME STRING field contains a UTF-8 format string. | |
398 | * The number of bytes in the SCSI NAME STRING field | |
399 | * (i.e., the value in the DESIGNATOR LENGTH field) | |
400 | * shall be no larger than 256 and shall be a multiple | |
401 | * of four. | |
402 | */ | |
403 | if (padding) | |
404 | scsi_name_len += padding; | |
405 | ||
406 | buf[off-1] = scsi_name_len; | |
407 | off += scsi_name_len; | |
408 | /* Header size + Designation descriptor */ | |
409 | len += (scsi_name_len + 4); | |
410 | } | |
c66ac9db NB |
411 | buf[2] = ((len >> 8) & 0xff); |
412 | buf[3] = (len & 0xff); /* Page Length for VPD 0x83 */ | |
413 | return 0; | |
414 | } | |
415 | ||
416 | /* Extended INQUIRY Data VPD Page */ | |
417 | static int | |
418 | target_emulate_evpd_86(struct se_cmd *cmd, unsigned char *buf) | |
419 | { | |
1289a057 | 420 | buf[3] = 0x3c; |
c66ac9db NB |
421 | /* Set HEADSUP, ORDSUP, SIMPSUP */ |
422 | buf[5] = 0x07; | |
423 | ||
424 | /* If WriteCache emulation is enabled, set V_SUP */ | |
5951146d | 425 | if (cmd->se_dev->se_sub_dev->se_dev_attrib.emulate_write_cache > 0) |
c66ac9db NB |
426 | buf[6] = 0x01; |
427 | return 0; | |
428 | } | |
429 | ||
430 | /* Block Limits VPD page */ | |
431 | static int | |
432 | target_emulate_evpd_b0(struct se_cmd *cmd, unsigned char *buf) | |
433 | { | |
5951146d | 434 | struct se_device *dev = cmd->se_dev; |
c66ac9db NB |
435 | int have_tp = 0; |
436 | ||
437 | /* | |
438 | * Following sbc3r22 section 6.5.3 Block Limits VPD page, when | |
439 | * emulate_tpu=1 or emulate_tpws=1 we will be expect a | |
440 | * different page length for Thin Provisioning. | |
441 | */ | |
e3d6f909 | 442 | if (dev->se_sub_dev->se_dev_attrib.emulate_tpu || dev->se_sub_dev->se_dev_attrib.emulate_tpws) |
c66ac9db NB |
443 | have_tp = 1; |
444 | ||
c66ac9db | 445 | buf[0] = dev->transport->get_device_type(dev); |
c66ac9db NB |
446 | buf[3] = have_tp ? 0x3c : 0x10; |
447 | ||
6708bb27 AG |
448 | /* Set WSNZ to 1 */ |
449 | buf[4] = 0x01; | |
450 | ||
c66ac9db NB |
451 | /* |
452 | * Set OPTIMAL TRANSFER LENGTH GRANULARITY | |
453 | */ | |
454 | put_unaligned_be16(1, &buf[6]); | |
455 | ||
456 | /* | |
457 | * Set MAXIMUM TRANSFER LENGTH | |
458 | */ | |
015487b8 | 459 | put_unaligned_be32(dev->se_sub_dev->se_dev_attrib.fabric_max_sectors, &buf[8]); |
c66ac9db NB |
460 | |
461 | /* | |
462 | * Set OPTIMAL TRANSFER LENGTH | |
463 | */ | |
e3d6f909 | 464 | put_unaligned_be32(dev->se_sub_dev->se_dev_attrib.optimal_sectors, &buf[12]); |
c66ac9db NB |
465 | |
466 | /* | |
d95b8246 | 467 | * Exit now if we don't support TP. |
c66ac9db | 468 | */ |
d95b8246 | 469 | if (!have_tp) |
c66ac9db NB |
470 | return 0; |
471 | ||
472 | /* | |
473 | * Set MAXIMUM UNMAP LBA COUNT | |
474 | */ | |
e3d6f909 | 475 | put_unaligned_be32(dev->se_sub_dev->se_dev_attrib.max_unmap_lba_count, &buf[20]); |
c66ac9db NB |
476 | |
477 | /* | |
478 | * Set MAXIMUM UNMAP BLOCK DESCRIPTOR COUNT | |
479 | */ | |
e3d6f909 | 480 | put_unaligned_be32(dev->se_sub_dev->se_dev_attrib.max_unmap_block_desc_count, |
c66ac9db NB |
481 | &buf[24]); |
482 | ||
483 | /* | |
484 | * Set OPTIMAL UNMAP GRANULARITY | |
485 | */ | |
e3d6f909 | 486 | put_unaligned_be32(dev->se_sub_dev->se_dev_attrib.unmap_granularity, &buf[28]); |
c66ac9db NB |
487 | |
488 | /* | |
489 | * UNMAP GRANULARITY ALIGNMENT | |
490 | */ | |
e3d6f909 | 491 | put_unaligned_be32(dev->se_sub_dev->se_dev_attrib.unmap_granularity_alignment, |
c66ac9db | 492 | &buf[32]); |
e3d6f909 | 493 | if (dev->se_sub_dev->se_dev_attrib.unmap_granularity_alignment != 0) |
c66ac9db NB |
494 | buf[32] |= 0x80; /* Set the UGAVALID bit */ |
495 | ||
496 | return 0; | |
497 | } | |
498 | ||
e22a7f07 RD |
499 | /* Block Device Characteristics VPD page */ |
500 | static int | |
501 | target_emulate_evpd_b1(struct se_cmd *cmd, unsigned char *buf) | |
502 | { | |
503 | struct se_device *dev = cmd->se_dev; | |
504 | ||
505 | buf[0] = dev->transport->get_device_type(dev); | |
506 | buf[3] = 0x3c; | |
d95b8246 | 507 | buf[5] = dev->se_sub_dev->se_dev_attrib.is_nonrot ? 1 : 0; |
e22a7f07 RD |
508 | |
509 | return 0; | |
510 | } | |
511 | ||
c66ac9db NB |
512 | /* Thin Provisioning VPD */ |
513 | static int | |
514 | target_emulate_evpd_b2(struct se_cmd *cmd, unsigned char *buf) | |
515 | { | |
5951146d | 516 | struct se_device *dev = cmd->se_dev; |
c66ac9db NB |
517 | |
518 | /* | |
519 | * From sbc3r22 section 6.5.4 Thin Provisioning VPD page: | |
520 | * | |
521 | * The PAGE LENGTH field is defined in SPC-4. If the DP bit is set to | |
522 | * zero, then the page length shall be set to 0004h. If the DP bit | |
523 | * is set to one, then the page length shall be set to the value | |
524 | * defined in table 162. | |
525 | */ | |
526 | buf[0] = dev->transport->get_device_type(dev); | |
c66ac9db NB |
527 | |
528 | /* | |
529 | * Set Hardcoded length mentioned above for DP=0 | |
530 | */ | |
531 | put_unaligned_be16(0x0004, &buf[2]); | |
532 | ||
533 | /* | |
534 | * The THRESHOLD EXPONENT field indicates the threshold set size in | |
535 | * LBAs as a power of 2 (i.e., the threshold set size is equal to | |
536 | * 2(threshold exponent)). | |
537 | * | |
538 | * Note that this is currently set to 0x00 as mkp says it will be | |
539 | * changing again. We can enable this once it has settled in T10 | |
540 | * and is actually used by Linux/SCSI ML code. | |
541 | */ | |
542 | buf[4] = 0x00; | |
543 | ||
544 | /* | |
545 | * A TPU bit set to one indicates that the device server supports | |
546 | * the UNMAP command (see 5.25). A TPU bit set to zero indicates | |
547 | * that the device server does not support the UNMAP command. | |
548 | */ | |
e3d6f909 | 549 | if (dev->se_sub_dev->se_dev_attrib.emulate_tpu != 0) |
c66ac9db NB |
550 | buf[5] = 0x80; |
551 | ||
552 | /* | |
553 | * A TPWS bit set to one indicates that the device server supports | |
554 | * the use of the WRITE SAME (16) command (see 5.42) to unmap LBAs. | |
555 | * A TPWS bit set to zero indicates that the device server does not | |
556 | * support the use of the WRITE SAME (16) command to unmap LBAs. | |
557 | */ | |
e3d6f909 | 558 | if (dev->se_sub_dev->se_dev_attrib.emulate_tpws != 0) |
c66ac9db NB |
559 | buf[5] |= 0x40; |
560 | ||
561 | return 0; | |
562 | } | |
563 | ||
b2eb705e RD |
564 | static int |
565 | target_emulate_evpd_00(struct se_cmd *cmd, unsigned char *buf); | |
566 | ||
567 | static struct { | |
568 | uint8_t page; | |
569 | int (*emulate)(struct se_cmd *, unsigned char *); | |
570 | } evpd_handlers[] = { | |
571 | { .page = 0x00, .emulate = target_emulate_evpd_00 }, | |
572 | { .page = 0x80, .emulate = target_emulate_evpd_80 }, | |
573 | { .page = 0x83, .emulate = target_emulate_evpd_83 }, | |
574 | { .page = 0x86, .emulate = target_emulate_evpd_86 }, | |
575 | { .page = 0xb0, .emulate = target_emulate_evpd_b0 }, | |
e22a7f07 | 576 | { .page = 0xb1, .emulate = target_emulate_evpd_b1 }, |
b2eb705e RD |
577 | { .page = 0xb2, .emulate = target_emulate_evpd_b2 }, |
578 | }; | |
579 | ||
580 | /* supported vital product data pages */ | |
581 | static int | |
582 | target_emulate_evpd_00(struct se_cmd *cmd, unsigned char *buf) | |
583 | { | |
584 | int p; | |
585 | ||
b2eb705e RD |
586 | /* |
587 | * Only report the INQUIRY EVPD=1 pages after a valid NAA | |
588 | * Registered Extended LUN WWN has been set via ConfigFS | |
589 | * during device creation/restart. | |
590 | */ | |
591 | if (cmd->se_dev->se_sub_dev->su_dev_flags & | |
592 | SDF_EMULATED_VPD_UNIT_SERIAL) { | |
593 | buf[3] = ARRAY_SIZE(evpd_handlers); | |
d95b8246 | 594 | for (p = 0; p < ARRAY_SIZE(evpd_handlers); ++p) |
b2eb705e RD |
595 | buf[p + 4] = evpd_handlers[p].page; |
596 | } | |
597 | ||
598 | return 0; | |
599 | } | |
600 | ||
5bda90c8 | 601 | int target_emulate_inquiry(struct se_task *task) |
c66ac9db | 602 | { |
6ed5a557 | 603 | struct se_cmd *cmd = task->task_se_cmd; |
5951146d | 604 | struct se_device *dev = cmd->se_dev; |
089461dd | 605 | struct se_portal_group *tpg = cmd->se_lun->lun_sep->sep_tpg; |
d95b8246 | 606 | unsigned char *buf, *map_buf; |
a1d8b49a | 607 | unsigned char *cdb = cmd->t_task_cdb; |
05d1c7c0 | 608 | int p, ret; |
c66ac9db | 609 | |
d95b8246 RD |
610 | map_buf = transport_kmap_data_sg(cmd); |
611 | /* | |
612 | * If SCF_PASSTHROUGH_SG_TO_MEM_NOALLOC is not set, then we | |
613 | * know we actually allocated a full page. Otherwise, if the | |
614 | * data buffer is too small, allocate a temporary buffer so we | |
615 | * don't have to worry about overruns in all our INQUIRY | |
616 | * emulation handling. | |
617 | */ | |
618 | if (cmd->data_length < SE_INQUIRY_BUF && | |
619 | (cmd->se_cmd_flags & SCF_PASSTHROUGH_SG_TO_MEM_NOALLOC)) { | |
620 | buf = kzalloc(SE_INQUIRY_BUF, GFP_KERNEL); | |
621 | if (!buf) { | |
622 | transport_kunmap_data_sg(cmd); | |
623 | cmd->scsi_sense_reason = TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; | |
624 | return -ENOMEM; | |
625 | } | |
626 | } else { | |
627 | buf = map_buf; | |
628 | } | |
629 | ||
089461dd RD |
630 | if (dev == tpg->tpg_virt_lun0.lun_se_dev) |
631 | buf[0] = 0x3f; /* Not connected */ | |
632 | else | |
633 | buf[0] = dev->transport->get_device_type(dev); | |
634 | ||
d29a5b6a | 635 | if (!(cdb[1] & 0x1)) { |
bf005355 RD |
636 | if (cdb[2]) { |
637 | pr_err("INQUIRY with EVPD==0 but PAGE CODE=%02x\n", | |
638 | cdb[2]); | |
639 | cmd->scsi_sense_reason = TCM_INVALID_CDB_FIELD; | |
d95b8246 RD |
640 | ret = -EINVAL; |
641 | goto out; | |
bf005355 RD |
642 | } |
643 | ||
d95b8246 | 644 | ret = target_emulate_inquiry_std(cmd, buf); |
d29a5b6a CH |
645 | goto out; |
646 | } | |
c66ac9db | 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 | 697 | |
4949314c | 698 | transport_kunmap_data_sg(cmd); |
05d1c7c0 | 699 | |
d29a5b6a CH |
700 | task->task_scsi_status = GOOD; |
701 | transport_complete_task(task, 1); | |
c66ac9db NB |
702 | return 0; |
703 | } | |
704 | ||
5bda90c8 | 705 | int target_emulate_readcapacity_16(struct se_task *task) |
c66ac9db | 706 | { |
6ed5a557 | 707 | struct se_cmd *cmd = task->task_se_cmd; |
5951146d | 708 | struct se_device *dev = cmd->se_dev; |
05d1c7c0 | 709 | unsigned char *buf; |
c66ac9db NB |
710 | unsigned long long blocks = dev->transport->get_blocks(dev); |
711 | ||
4949314c | 712 | buf = transport_kmap_data_sg(cmd); |
05d1c7c0 | 713 | |
c66ac9db NB |
714 | buf[0] = (blocks >> 56) & 0xff; |
715 | buf[1] = (blocks >> 48) & 0xff; | |
716 | buf[2] = (blocks >> 40) & 0xff; | |
717 | buf[3] = (blocks >> 32) & 0xff; | |
718 | buf[4] = (blocks >> 24) & 0xff; | |
719 | buf[5] = (blocks >> 16) & 0xff; | |
720 | buf[6] = (blocks >> 8) & 0xff; | |
721 | buf[7] = blocks & 0xff; | |
e3d6f909 AG |
722 | buf[8] = (dev->se_sub_dev->se_dev_attrib.block_size >> 24) & 0xff; |
723 | buf[9] = (dev->se_sub_dev->se_dev_attrib.block_size >> 16) & 0xff; | |
724 | buf[10] = (dev->se_sub_dev->se_dev_attrib.block_size >> 8) & 0xff; | |
725 | buf[11] = dev->se_sub_dev->se_dev_attrib.block_size & 0xff; | |
c66ac9db NB |
726 | /* |
727 | * Set Thin Provisioning Enable bit following sbc3r22 in section | |
728 | * READ CAPACITY (16) byte 14 if emulate_tpu or emulate_tpws is enabled. | |
729 | */ | |
e3d6f909 | 730 | if (dev->se_sub_dev->se_dev_attrib.emulate_tpu || dev->se_sub_dev->se_dev_attrib.emulate_tpws) |
c66ac9db NB |
731 | buf[14] = 0x80; |
732 | ||
4949314c | 733 | transport_kunmap_data_sg(cmd); |
05d1c7c0 | 734 | |
d29a5b6a CH |
735 | task->task_scsi_status = GOOD; |
736 | transport_complete_task(task, 1); | |
c66ac9db NB |
737 | return 0; |
738 | } | |
739 | ||
740 | static int | |
741 | target_modesense_rwrecovery(unsigned char *p) | |
742 | { | |
743 | p[0] = 0x01; | |
744 | p[1] = 0x0a; | |
745 | ||
746 | return 12; | |
747 | } | |
748 | ||
749 | static int | |
750 | target_modesense_control(struct se_device *dev, unsigned char *p) | |
751 | { | |
752 | p[0] = 0x0a; | |
753 | p[1] = 0x0a; | |
754 | p[2] = 2; | |
5de619a3 NB |
755 | /* |
756 | * From spc4r23, 7.4.7 Control mode page | |
757 | * | |
758 | * The QUEUE ALGORITHM MODIFIER field (see table 368) specifies | |
759 | * restrictions on the algorithm used for reordering commands | |
760 | * having the SIMPLE task attribute (see SAM-4). | |
761 | * | |
762 | * Table 368 -- QUEUE ALGORITHM MODIFIER field | |
763 | * Code Description | |
764 | * 0h Restricted reordering | |
765 | * 1h Unrestricted reordering allowed | |
766 | * 2h to 7h Reserved | |
767 | * 8h to Fh Vendor specific | |
768 | * | |
769 | * A value of zero in the QUEUE ALGORITHM MODIFIER field specifies that | |
770 | * the device server shall order the processing sequence of commands | |
771 | * having the SIMPLE task attribute such that data integrity is maintained | |
772 | * for that I_T nexus (i.e., if the transmission of new SCSI transport protocol | |
773 | * requests is halted at any time, the final value of all data observable | |
774 | * on the medium shall be the same as if all the commands had been processed | |
775 | * with the ORDERED task attribute). | |
776 | * | |
777 | * A value of one in the QUEUE ALGORITHM MODIFIER field specifies that the | |
778 | * device server may reorder the processing sequence of commands having the | |
779 | * SIMPLE task attribute in any manner. Any data integrity exposures related to | |
780 | * command sequence order shall be explicitly handled by the application client | |
781 | * through the selection of appropriate ommands and task attributes. | |
782 | */ | |
783 | p[3] = (dev->se_sub_dev->se_dev_attrib.emulate_rest_reord == 1) ? 0x00 : 0x10; | |
c66ac9db NB |
784 | /* |
785 | * From spc4r17, section 7.4.6 Control mode Page | |
786 | * | |
787 | * Unit Attention interlocks control (UN_INTLCK_CTRL) to code 00b | |
788 | * | |
789 | * 00b: The logical unit shall clear any unit attention condition | |
790 | * reported in the same I_T_L_Q nexus transaction as a CHECK CONDITION | |
791 | * status and shall not establish a unit attention condition when a com- | |
792 | * mand is completed with BUSY, TASK SET FULL, or RESERVATION CONFLICT | |
793 | * status. | |
794 | * | |
795 | * 10b: The logical unit shall not clear any unit attention condition | |
796 | * reported in the same I_T_L_Q nexus transaction as a CHECK CONDITION | |
797 | * status and shall not establish a unit attention condition when | |
798 | * a command is completed with BUSY, TASK SET FULL, or RESERVATION | |
799 | * CONFLICT status. | |
800 | * | |
801 | * 11b a The logical unit shall not clear any unit attention condition | |
802 | * reported in the same I_T_L_Q nexus transaction as a CHECK CONDITION | |
803 | * status and shall establish a unit attention condition for the | |
804 | * initiator port associated with the I_T nexus on which the BUSY, | |
805 | * TASK SET FULL, or RESERVATION CONFLICT status is being returned. | |
806 | * Depending on the status, the additional sense code shall be set to | |
807 | * PREVIOUS BUSY STATUS, PREVIOUS TASK SET FULL STATUS, or PREVIOUS | |
808 | * RESERVATION CONFLICT STATUS. Until it is cleared by a REQUEST SENSE | |
809 | * command, a unit attention condition shall be established only once | |
810 | * for a BUSY, TASK SET FULL, or RESERVATION CONFLICT status regardless | |
811 | * to the number of commands completed with one of those status codes. | |
812 | */ | |
e3d6f909 AG |
813 | p[4] = (dev->se_sub_dev->se_dev_attrib.emulate_ua_intlck_ctrl == 2) ? 0x30 : |
814 | (dev->se_sub_dev->se_dev_attrib.emulate_ua_intlck_ctrl == 1) ? 0x20 : 0x00; | |
c66ac9db NB |
815 | /* |
816 | * From spc4r17, section 7.4.6 Control mode Page | |
817 | * | |
818 | * Task Aborted Status (TAS) bit set to zero. | |
819 | * | |
820 | * A task aborted status (TAS) bit set to zero specifies that aborted | |
821 | * tasks shall be terminated by the device server without any response | |
822 | * to the application client. A TAS bit set to one specifies that tasks | |
823 | * aborted by the actions of an I_T nexus other than the I_T nexus on | |
824 | * which the command was received shall be completed with TASK ABORTED | |
825 | * status (see SAM-4). | |
826 | */ | |
e3d6f909 | 827 | p[5] = (dev->se_sub_dev->se_dev_attrib.emulate_tas) ? 0x40 : 0x00; |
c66ac9db NB |
828 | p[8] = 0xff; |
829 | p[9] = 0xff; | |
830 | p[11] = 30; | |
831 | ||
832 | return 12; | |
833 | } | |
834 | ||
835 | static int | |
836 | target_modesense_caching(struct se_device *dev, unsigned char *p) | |
837 | { | |
838 | p[0] = 0x08; | |
839 | p[1] = 0x12; | |
e3d6f909 | 840 | if (dev->se_sub_dev->se_dev_attrib.emulate_write_cache > 0) |
c66ac9db NB |
841 | p[2] = 0x04; /* Write Cache Enable */ |
842 | p[12] = 0x20; /* Disabled Read Ahead */ | |
843 | ||
844 | return 20; | |
845 | } | |
846 | ||
847 | static void | |
848 | target_modesense_write_protect(unsigned char *buf, int type) | |
849 | { | |
850 | /* | |
851 | * I believe that the WP bit (bit 7) in the mode header is the same for | |
852 | * all device types.. | |
853 | */ | |
854 | switch (type) { | |
855 | case TYPE_DISK: | |
856 | case TYPE_TAPE: | |
857 | default: | |
858 | buf[0] |= 0x80; /* WP bit */ | |
859 | break; | |
860 | } | |
861 | } | |
862 | ||
863 | static void | |
864 | target_modesense_dpofua(unsigned char *buf, int type) | |
865 | { | |
866 | switch (type) { | |
867 | case TYPE_DISK: | |
868 | buf[0] |= 0x10; /* DPOFUA bit */ | |
869 | break; | |
870 | default: | |
871 | break; | |
872 | } | |
873 | } | |
874 | ||
5bda90c8 | 875 | int target_emulate_modesense(struct se_task *task) |
c66ac9db | 876 | { |
6ed5a557 | 877 | struct se_cmd *cmd = task->task_se_cmd; |
5951146d | 878 | struct se_device *dev = cmd->se_dev; |
a1d8b49a | 879 | char *cdb = cmd->t_task_cdb; |
05d1c7c0 | 880 | unsigned char *rbuf; |
c66ac9db | 881 | int type = dev->transport->get_device_type(dev); |
6ed5a557 CH |
882 | int ten = (cmd->t_task_cdb[0] == MODE_SENSE_10); |
883 | int offset = ten ? 8 : 4; | |
c66ac9db NB |
884 | int length = 0; |
885 | unsigned char buf[SE_MODE_PAGE_BUF]; | |
886 | ||
887 | memset(buf, 0, SE_MODE_PAGE_BUF); | |
888 | ||
889 | switch (cdb[2] & 0x3f) { | |
890 | case 0x01: | |
891 | length = target_modesense_rwrecovery(&buf[offset]); | |
892 | break; | |
893 | case 0x08: | |
894 | length = target_modesense_caching(dev, &buf[offset]); | |
895 | break; | |
896 | case 0x0a: | |
897 | length = target_modesense_control(dev, &buf[offset]); | |
898 | break; | |
899 | case 0x3f: | |
900 | length = target_modesense_rwrecovery(&buf[offset]); | |
901 | length += target_modesense_caching(dev, &buf[offset+length]); | |
902 | length += target_modesense_control(dev, &buf[offset+length]); | |
903 | break; | |
904 | default: | |
f15ea578 RD |
905 | pr_err("MODE SENSE: unimplemented page/subpage: 0x%02x/0x%02x\n", |
906 | cdb[2] & 0x3f, cdb[3]); | |
03e98c9e NB |
907 | cmd->scsi_sense_reason = TCM_UNKNOWN_MODE_PAGE; |
908 | return -EINVAL; | |
c66ac9db NB |
909 | } |
910 | offset += length; | |
911 | ||
912 | if (ten) { | |
913 | offset -= 2; | |
914 | buf[0] = (offset >> 8) & 0xff; | |
915 | buf[1] = offset & 0xff; | |
916 | ||
e3d6f909 | 917 | if ((cmd->se_lun->lun_access & TRANSPORT_LUNFLAGS_READ_ONLY) || |
c66ac9db NB |
918 | (cmd->se_deve && |
919 | (cmd->se_deve->lun_flags & TRANSPORT_LUNFLAGS_READ_ONLY))) | |
920 | target_modesense_write_protect(&buf[3], type); | |
921 | ||
e3d6f909 AG |
922 | if ((dev->se_sub_dev->se_dev_attrib.emulate_write_cache > 0) && |
923 | (dev->se_sub_dev->se_dev_attrib.emulate_fua_write > 0)) | |
c66ac9db NB |
924 | target_modesense_dpofua(&buf[3], type); |
925 | ||
926 | if ((offset + 2) > cmd->data_length) | |
927 | offset = cmd->data_length; | |
928 | ||
929 | } else { | |
930 | offset -= 1; | |
931 | buf[0] = offset & 0xff; | |
932 | ||
e3d6f909 | 933 | if ((cmd->se_lun->lun_access & TRANSPORT_LUNFLAGS_READ_ONLY) || |
c66ac9db NB |
934 | (cmd->se_deve && |
935 | (cmd->se_deve->lun_flags & TRANSPORT_LUNFLAGS_READ_ONLY))) | |
936 | target_modesense_write_protect(&buf[2], type); | |
937 | ||
e3d6f909 AG |
938 | if ((dev->se_sub_dev->se_dev_attrib.emulate_write_cache > 0) && |
939 | (dev->se_sub_dev->se_dev_attrib.emulate_fua_write > 0)) | |
c66ac9db NB |
940 | target_modesense_dpofua(&buf[2], type); |
941 | ||
942 | if ((offset + 1) > cmd->data_length) | |
943 | offset = cmd->data_length; | |
944 | } | |
05d1c7c0 | 945 | |
4949314c | 946 | rbuf = transport_kmap_data_sg(cmd); |
c66ac9db | 947 | memcpy(rbuf, buf, offset); |
4949314c | 948 | transport_kunmap_data_sg(cmd); |
c66ac9db | 949 | |
d29a5b6a CH |
950 | task->task_scsi_status = GOOD; |
951 | transport_complete_task(task, 1); | |
c66ac9db NB |
952 | return 0; |
953 | } | |
954 | ||
5bda90c8 | 955 | int target_emulate_request_sense(struct se_task *task) |
c66ac9db | 956 | { |
6ed5a557 | 957 | struct se_cmd *cmd = task->task_se_cmd; |
a1d8b49a | 958 | unsigned char *cdb = cmd->t_task_cdb; |
05d1c7c0 | 959 | unsigned char *buf; |
c66ac9db | 960 | u8 ua_asc = 0, ua_ascq = 0; |
05d1c7c0 | 961 | int err = 0; |
c66ac9db NB |
962 | |
963 | if (cdb[1] & 0x01) { | |
6708bb27 | 964 | pr_err("REQUEST_SENSE description emulation not" |
c66ac9db | 965 | " supported\n"); |
03e98c9e NB |
966 | cmd->scsi_sense_reason = TCM_INVALID_CDB_FIELD; |
967 | return -ENOSYS; | |
c66ac9db | 968 | } |
05d1c7c0 | 969 | |
4949314c | 970 | buf = transport_kmap_data_sg(cmd); |
05d1c7c0 | 971 | |
6708bb27 | 972 | if (!core_scsi3_ua_clear_for_request_sense(cmd, &ua_asc, &ua_ascq)) { |
c66ac9db NB |
973 | /* |
974 | * CURRENT ERROR, UNIT ATTENTION | |
975 | */ | |
976 | buf[0] = 0x70; | |
977 | buf[SPC_SENSE_KEY_OFFSET] = UNIT_ATTENTION; | |
95fe1ee4 SAS |
978 | |
979 | if (cmd->data_length < 18) { | |
c66ac9db | 980 | buf[7] = 0x00; |
05d1c7c0 AG |
981 | err = -EINVAL; |
982 | goto end; | |
c66ac9db NB |
983 | } |
984 | /* | |
985 | * The Additional Sense Code (ASC) from the UNIT ATTENTION | |
986 | */ | |
987 | buf[SPC_ASC_KEY_OFFSET] = ua_asc; | |
988 | buf[SPC_ASCQ_KEY_OFFSET] = ua_ascq; | |
989 | buf[7] = 0x0A; | |
990 | } else { | |
991 | /* | |
992 | * CURRENT ERROR, NO SENSE | |
993 | */ | |
994 | buf[0] = 0x70; | |
995 | buf[SPC_SENSE_KEY_OFFSET] = NO_SENSE; | |
95fe1ee4 SAS |
996 | |
997 | if (cmd->data_length < 18) { | |
c66ac9db | 998 | buf[7] = 0x00; |
05d1c7c0 AG |
999 | err = -EINVAL; |
1000 | goto end; | |
c66ac9db NB |
1001 | } |
1002 | /* | |
1003 | * NO ADDITIONAL SENSE INFORMATION | |
1004 | */ | |
1005 | buf[SPC_ASC_KEY_OFFSET] = 0x00; | |
1006 | buf[7] = 0x0A; | |
1007 | } | |
1008 | ||
05d1c7c0 | 1009 | end: |
4949314c | 1010 | transport_kunmap_data_sg(cmd); |
d29a5b6a CH |
1011 | task->task_scsi_status = GOOD; |
1012 | transport_complete_task(task, 1); | |
c66ac9db NB |
1013 | return 0; |
1014 | } | |
1015 | ||
1016 | /* | |
1017 | * Used for TCM/IBLOCK and TCM/FILEIO for block/blk-lib.c level discard support. | |
1018 | * Note this is not used for TCM/pSCSI passthrough | |
1019 | */ | |
5bda90c8 | 1020 | int target_emulate_unmap(struct se_task *task) |
c66ac9db | 1021 | { |
e3d6f909 | 1022 | struct se_cmd *cmd = task->task_se_cmd; |
5951146d | 1023 | struct se_device *dev = cmd->se_dev; |
05d1c7c0 | 1024 | unsigned char *buf, *ptr = NULL; |
a1d8b49a | 1025 | unsigned char *cdb = &cmd->t_task_cdb[0]; |
c66ac9db NB |
1026 | sector_t lba; |
1027 | unsigned int size = cmd->data_length, range; | |
05d1c7c0 | 1028 | int ret = 0, offset; |
c66ac9db NB |
1029 | unsigned short dl, bd_dl; |
1030 | ||
6ed5a557 CH |
1031 | if (!dev->transport->do_discard) { |
1032 | pr_err("UNMAP emulation not supported for: %s\n", | |
1033 | dev->transport->name); | |
03e98c9e NB |
1034 | cmd->scsi_sense_reason = TCM_UNSUPPORTED_SCSI_OPCODE; |
1035 | return -ENOSYS; | |
6ed5a557 CH |
1036 | } |
1037 | ||
c66ac9db NB |
1038 | /* First UNMAP block descriptor starts at 8 byte offset */ |
1039 | offset = 8; | |
1040 | size -= 8; | |
1041 | dl = get_unaligned_be16(&cdb[0]); | |
1042 | bd_dl = get_unaligned_be16(&cdb[2]); | |
05d1c7c0 | 1043 | |
4949314c | 1044 | buf = transport_kmap_data_sg(cmd); |
05d1c7c0 | 1045 | |
c66ac9db | 1046 | ptr = &buf[offset]; |
6708bb27 | 1047 | pr_debug("UNMAP: Sub: %s Using dl: %hu bd_dl: %hu size: %hu" |
c66ac9db NB |
1048 | " ptr: %p\n", dev->transport->name, dl, bd_dl, size, ptr); |
1049 | ||
1050 | while (size) { | |
1051 | lba = get_unaligned_be64(&ptr[0]); | |
1052 | range = get_unaligned_be32(&ptr[8]); | |
6708bb27 | 1053 | pr_debug("UNMAP: Using lba: %llu and range: %u\n", |
c66ac9db NB |
1054 | (unsigned long long)lba, range); |
1055 | ||
1056 | ret = dev->transport->do_discard(dev, lba, range); | |
1057 | if (ret < 0) { | |
6708bb27 | 1058 | pr_err("blkdev_issue_discard() failed: %d\n", |
c66ac9db | 1059 | ret); |
05d1c7c0 | 1060 | goto err; |
c66ac9db NB |
1061 | } |
1062 | ||
1063 | ptr += 16; | |
1064 | size -= 16; | |
1065 | } | |
1066 | ||
05d1c7c0 | 1067 | err: |
4949314c | 1068 | transport_kunmap_data_sg(cmd); |
d29a5b6a CH |
1069 | if (!ret) { |
1070 | task->task_scsi_status = GOOD; | |
1071 | transport_complete_task(task, 1); | |
1072 | } | |
05d1c7c0 | 1073 | return ret; |
c66ac9db NB |
1074 | } |
1075 | ||
1076 | /* | |
1077 | * Used for TCM/IBLOCK and TCM/FILEIO for block/blk-lib.c level discard support. | |
1078 | * Note this is not used for TCM/pSCSI passthrough | |
1079 | */ | |
5bda90c8 | 1080 | int target_emulate_write_same(struct se_task *task) |
c66ac9db | 1081 | { |
e3d6f909 | 1082 | struct se_cmd *cmd = task->task_se_cmd; |
5951146d | 1083 | struct se_device *dev = cmd->se_dev; |
a1d8b49a AG |
1084 | sector_t range; |
1085 | sector_t lba = cmd->t_task_lba; | |
6ed5a557 | 1086 | u32 num_blocks; |
c66ac9db | 1087 | int ret; |
6ed5a557 CH |
1088 | |
1089 | if (!dev->transport->do_discard) { | |
1090 | pr_err("WRITE_SAME emulation not supported" | |
1091 | " for: %s\n", dev->transport->name); | |
03e98c9e NB |
1092 | cmd->scsi_sense_reason = TCM_UNSUPPORTED_SCSI_OPCODE; |
1093 | return -ENOSYS; | |
6ed5a557 CH |
1094 | } |
1095 | ||
1096 | if (cmd->t_task_cdb[0] == WRITE_SAME) | |
1097 | num_blocks = get_unaligned_be16(&cmd->t_task_cdb[7]); | |
1098 | else if (cmd->t_task_cdb[0] == WRITE_SAME_16) | |
1099 | num_blocks = get_unaligned_be32(&cmd->t_task_cdb[10]); | |
1100 | else /* WRITE_SAME_32 via VARIABLE_LENGTH_CMD */ | |
1101 | num_blocks = get_unaligned_be32(&cmd->t_task_cdb[28]); | |
1102 | ||
dd3a5ad8 | 1103 | /* |
706d5860 NB |
1104 | * Use the explicit range when non zero is supplied, otherwise calculate |
1105 | * the remaining range based on ->get_blocks() - starting LBA. | |
dd3a5ad8 | 1106 | */ |
dd3a5ad8 NB |
1107 | if (num_blocks != 0) |
1108 | range = num_blocks; | |
1109 | else | |
1110 | range = (dev->transport->get_blocks(dev) - lba); | |
c66ac9db | 1111 | |
6708bb27 | 1112 | pr_debug("WRITE_SAME UNMAP: LBA: %llu Range: %llu\n", |
dd3a5ad8 | 1113 | (unsigned long long)lba, (unsigned long long)range); |
c66ac9db NB |
1114 | |
1115 | ret = dev->transport->do_discard(dev, lba, range); | |
1116 | if (ret < 0) { | |
6708bb27 | 1117 | pr_debug("blkdev_issue_discard() failed for WRITE_SAME\n"); |
e3d6f909 | 1118 | return ret; |
c66ac9db NB |
1119 | } |
1120 | ||
d29a5b6a CH |
1121 | task->task_scsi_status = GOOD; |
1122 | transport_complete_task(task, 1); | |
c66ac9db NB |
1123 | return 0; |
1124 | } | |
1125 | ||
5bda90c8 | 1126 | int target_emulate_synchronize_cache(struct se_task *task) |
6ed5a557 CH |
1127 | { |
1128 | struct se_device *dev = task->task_se_cmd->se_dev; | |
03e98c9e | 1129 | struct se_cmd *cmd = task->task_se_cmd; |
6ed5a557 CH |
1130 | |
1131 | if (!dev->transport->do_sync_cache) { | |
1132 | pr_err("SYNCHRONIZE_CACHE emulation not supported" | |
1133 | " for: %s\n", dev->transport->name); | |
03e98c9e NB |
1134 | cmd->scsi_sense_reason = TCM_UNSUPPORTED_SCSI_OPCODE; |
1135 | return -ENOSYS; | |
6ed5a557 CH |
1136 | } |
1137 | ||
1138 | dev->transport->do_sync_cache(task); | |
1139 | return 0; | |
1140 | } | |
1141 | ||
5bda90c8 | 1142 | int target_emulate_noop(struct se_task *task) |
d29a5b6a CH |
1143 | { |
1144 | task->task_scsi_status = GOOD; | |
1145 | transport_complete_task(task, 1); | |
1146 | return 0; | |
1147 | } | |
1148 | ||
485fd0d1 CH |
1149 | /* |
1150 | * Write a CDB into @cdb that is based on the one the intiator sent us, | |
1151 | * but updated to only cover the sectors that the current task handles. | |
1152 | */ | |
1153 | void target_get_task_cdb(struct se_task *task, unsigned char *cdb) | |
1154 | { | |
1155 | struct se_cmd *cmd = task->task_se_cmd; | |
b937d270 | 1156 | unsigned int cdb_len = scsi_command_size(cmd->t_task_cdb); |
485fd0d1 | 1157 | |
b937d270 | 1158 | memcpy(cdb, cmd->t_task_cdb, cdb_len); |
485fd0d1 | 1159 | if (cmd->se_cmd_flags & SCF_SCSI_DATA_SG_IO_CDB) { |
b937d270 CH |
1160 | unsigned long long lba = task->task_lba; |
1161 | u32 sectors = task->task_sectors; | |
1162 | ||
1163 | switch (cdb_len) { | |
1164 | case 6: | |
1165 | /* 21-bit LBA and 8-bit sectors */ | |
1166 | cdb[1] = (lba >> 16) & 0x1f; | |
1167 | cdb[2] = (lba >> 8) & 0xff; | |
1168 | cdb[3] = lba & 0xff; | |
1169 | cdb[4] = sectors & 0xff; | |
1170 | break; | |
1171 | case 10: | |
1172 | /* 32-bit LBA and 16-bit sectors */ | |
1173 | put_unaligned_be32(lba, &cdb[2]); | |
1174 | put_unaligned_be16(sectors, &cdb[7]); | |
1175 | break; | |
1176 | case 12: | |
1177 | /* 32-bit LBA and 32-bit sectors */ | |
1178 | put_unaligned_be32(lba, &cdb[2]); | |
1179 | put_unaligned_be32(sectors, &cdb[6]); | |
1180 | break; | |
1181 | case 16: | |
1182 | /* 64-bit LBA and 32-bit sectors */ | |
1183 | put_unaligned_be64(lba, &cdb[2]); | |
1184 | put_unaligned_be32(sectors, &cdb[10]); | |
1185 | break; | |
1186 | case 32: | |
1187 | /* 64-bit LBA and 32-bit sectors, extended CDB */ | |
1188 | put_unaligned_be64(lba, &cdb[12]); | |
1189 | put_unaligned_be32(sectors, &cdb[28]); | |
1190 | break; | |
1191 | default: | |
1192 | BUG(); | |
1193 | } | |
485fd0d1 CH |
1194 | } |
1195 | } | |
1196 | EXPORT_SYMBOL(target_get_task_cdb); |