Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 1 | /* |
| 2 | * CDB emulation for non-READ/WRITE commands. |
| 3 | * |
| 4 | * Copyright (c) 2002, 2003, 2004, 2005 PyX Technologies, Inc. |
| 5 | * Copyright (c) 2005, 2006, 2007 SBE, Inc. |
| 6 | * Copyright (c) 2007-2010 Rising Tide Systems |
| 7 | * Copyright (c) 2008-2010 Linux-iSCSI.org |
| 8 | * |
| 9 | * Nicholas A. Bellinger <nab@kernel.org> |
| 10 | * |
| 11 | * This program is free software; you can redistribute it and/or modify |
| 12 | * it under the terms of the GNU General Public License as published by |
| 13 | * the Free Software Foundation; either version 2 of the License, or |
| 14 | * (at your option) any later version. |
| 15 | * |
| 16 | * This program is distributed in the hope that it will be useful, |
| 17 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 18 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 19 | * GNU General Public License for more details. |
| 20 | * |
| 21 | * You should have received a copy of the GNU General Public License |
| 22 | * along with this program; if not, write to the Free Software |
| 23 | * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. |
| 24 | */ |
| 25 | |
| 26 | #include <asm/unaligned.h> |
| 27 | #include <scsi/scsi.h> |
| 28 | |
| 29 | #include <target/target_core_base.h> |
| 30 | #include <target/target_core_transport.h> |
| 31 | #include <target/target_core_fabric_ops.h> |
| 32 | #include "target_core_ua.h" |
| 33 | |
| 34 | static void |
| 35 | target_fill_alua_data(struct se_port *port, unsigned char *buf) |
| 36 | { |
| 37 | struct t10_alua_tg_pt_gp *tg_pt_gp; |
| 38 | struct t10_alua_tg_pt_gp_member *tg_pt_gp_mem; |
| 39 | |
| 40 | /* |
| 41 | * Set SCCS for MAINTENANCE_IN + REPORT_TARGET_PORT_GROUPS. |
| 42 | */ |
| 43 | buf[5] = 0x80; |
| 44 | |
| 45 | /* |
| 46 | * Set TPGS field for explict and/or implict ALUA access type |
| 47 | * and opteration. |
| 48 | * |
| 49 | * See spc4r17 section 6.4.2 Table 135 |
| 50 | */ |
| 51 | if (!port) |
| 52 | return; |
| 53 | tg_pt_gp_mem = port->sep_alua_tg_pt_gp_mem; |
| 54 | if (!tg_pt_gp_mem) |
| 55 | return; |
| 56 | |
| 57 | spin_lock(&tg_pt_gp_mem->tg_pt_gp_mem_lock); |
| 58 | tg_pt_gp = tg_pt_gp_mem->tg_pt_gp; |
| 59 | if (tg_pt_gp) |
| 60 | buf[5] |= tg_pt_gp->tg_pt_gp_alua_access_type; |
| 61 | spin_unlock(&tg_pt_gp_mem->tg_pt_gp_mem_lock); |
| 62 | } |
| 63 | |
| 64 | static int |
| 65 | target_emulate_inquiry_std(struct se_cmd *cmd) |
| 66 | { |
| 67 | struct se_lun *lun = SE_LUN(cmd); |
| 68 | struct se_device *dev = SE_DEV(cmd); |
| 69 | unsigned char *buf = cmd->t_task->t_task_buf; |
| 70 | |
| 71 | /* |
| 72 | * Make sure we at least have 6 bytes of INQUIRY response |
| 73 | * payload going back for EVPD=0 |
| 74 | */ |
| 75 | if (cmd->data_length < 6) { |
| 76 | printk(KERN_ERR "SCSI Inquiry payload length: %u" |
| 77 | " too small for EVPD=0\n", cmd->data_length); |
| 78 | return -1; |
| 79 | } |
| 80 | |
| 81 | buf[0] = dev->transport->get_device_type(dev); |
| 82 | if (buf[0] == TYPE_TAPE) |
| 83 | buf[1] = 0x80; |
| 84 | buf[2] = dev->transport->get_device_rev(dev); |
| 85 | |
| 86 | /* |
| 87 | * Enable SCCS and TPGS fields for Emulated ALUA |
| 88 | */ |
| 89 | if (T10_ALUA(dev->se_sub_dev)->alua_type == SPC3_ALUA_EMULATED) |
| 90 | target_fill_alua_data(lun->lun_sep, buf); |
| 91 | |
| 92 | if (cmd->data_length < 8) { |
| 93 | buf[4] = 1; /* Set additional length to 1 */ |
| 94 | return 0; |
| 95 | } |
| 96 | |
| 97 | buf[7] = 0x32; /* Sync=1 and CmdQue=1 */ |
| 98 | |
| 99 | /* |
| 100 | * Do not include vendor, product, reversion info in INQUIRY |
| 101 | * response payload for cdbs with a small allocation length. |
| 102 | */ |
| 103 | if (cmd->data_length < 36) { |
| 104 | buf[4] = 3; /* Set additional length to 3 */ |
| 105 | return 0; |
| 106 | } |
| 107 | |
| 108 | snprintf((unsigned char *)&buf[8], 8, "LIO-ORG"); |
| 109 | snprintf((unsigned char *)&buf[16], 16, "%s", |
| 110 | &DEV_T10_WWN(dev)->model[0]); |
| 111 | snprintf((unsigned char *)&buf[32], 4, "%s", |
| 112 | &DEV_T10_WWN(dev)->revision[0]); |
| 113 | buf[4] = 31; /* Set additional length to 31 */ |
| 114 | return 0; |
| 115 | } |
| 116 | |
| 117 | /* supported vital product data pages */ |
| 118 | static int |
| 119 | target_emulate_evpd_00(struct se_cmd *cmd, unsigned char *buf) |
| 120 | { |
| 121 | buf[1] = 0x00; |
| 122 | if (cmd->data_length < 8) |
| 123 | return 0; |
| 124 | |
| 125 | buf[4] = 0x0; |
| 126 | /* |
| 127 | * Only report the INQUIRY EVPD=1 pages after a valid NAA |
| 128 | * Registered Extended LUN WWN has been set via ConfigFS |
| 129 | * during device creation/restart. |
| 130 | */ |
| 131 | if (SE_DEV(cmd)->se_sub_dev->su_dev_flags & |
| 132 | SDF_EMULATED_VPD_UNIT_SERIAL) { |
| 133 | buf[3] = 3; |
| 134 | buf[5] = 0x80; |
| 135 | buf[6] = 0x83; |
| 136 | buf[7] = 0x86; |
| 137 | } |
| 138 | |
| 139 | return 0; |
| 140 | } |
| 141 | |
| 142 | /* unit serial number */ |
| 143 | static int |
| 144 | target_emulate_evpd_80(struct se_cmd *cmd, unsigned char *buf) |
| 145 | { |
| 146 | struct se_device *dev = SE_DEV(cmd); |
| 147 | u16 len = 0; |
| 148 | |
| 149 | buf[1] = 0x80; |
| 150 | if (dev->se_sub_dev->su_dev_flags & |
| 151 | SDF_EMULATED_VPD_UNIT_SERIAL) { |
| 152 | u32 unit_serial_len; |
| 153 | |
| 154 | unit_serial_len = |
| 155 | strlen(&DEV_T10_WWN(dev)->unit_serial[0]); |
| 156 | unit_serial_len++; /* For NULL Terminator */ |
| 157 | |
| 158 | if (((len + 4) + unit_serial_len) > cmd->data_length) { |
| 159 | len += unit_serial_len; |
| 160 | buf[2] = ((len >> 8) & 0xff); |
| 161 | buf[3] = (len & 0xff); |
| 162 | return 0; |
| 163 | } |
| 164 | len += sprintf((unsigned char *)&buf[4], "%s", |
| 165 | &DEV_T10_WWN(dev)->unit_serial[0]); |
| 166 | len++; /* Extra Byte for NULL Terminator */ |
| 167 | buf[3] = len; |
| 168 | } |
| 169 | return 0; |
| 170 | } |
| 171 | |
| 172 | /* |
| 173 | * Device identification VPD, for a complete list of |
| 174 | * DESIGNATOR TYPEs see spc4r17 Table 459. |
| 175 | */ |
| 176 | static int |
| 177 | target_emulate_evpd_83(struct se_cmd *cmd, unsigned char *buf) |
| 178 | { |
| 179 | struct se_device *dev = SE_DEV(cmd); |
| 180 | struct se_lun *lun = SE_LUN(cmd); |
| 181 | struct se_port *port = NULL; |
| 182 | struct se_portal_group *tpg = NULL; |
| 183 | struct t10_alua_lu_gp_member *lu_gp_mem; |
| 184 | struct t10_alua_tg_pt_gp *tg_pt_gp; |
| 185 | struct t10_alua_tg_pt_gp_member *tg_pt_gp_mem; |
| 186 | unsigned char binary, binary_new; |
| 187 | unsigned char *prod = &DEV_T10_WWN(dev)->model[0]; |
| 188 | u32 prod_len; |
| 189 | u32 unit_serial_len, off = 0; |
| 190 | int i; |
| 191 | u16 len = 0, id_len; |
| 192 | |
| 193 | buf[1] = 0x83; |
| 194 | off = 4; |
| 195 | |
| 196 | /* |
| 197 | * NAA IEEE Registered Extended Assigned designator format, see |
| 198 | * spc4r17 section 7.7.3.6.5 |
| 199 | * |
| 200 | * We depend upon a target_core_mod/ConfigFS provided |
| 201 | * /sys/kernel/config/target/core/$HBA/$DEV/wwn/vpd_unit_serial |
| 202 | * value in order to return the NAA id. |
| 203 | */ |
| 204 | if (!(dev->se_sub_dev->su_dev_flags & SDF_EMULATED_VPD_UNIT_SERIAL)) |
| 205 | goto check_t10_vend_desc; |
| 206 | |
| 207 | if (off + 20 > cmd->data_length) |
| 208 | goto check_t10_vend_desc; |
| 209 | |
| 210 | /* CODE SET == Binary */ |
| 211 | buf[off++] = 0x1; |
| 212 | |
| 213 | /* Set ASSOICATION == addressed logical unit: 0)b */ |
| 214 | buf[off] = 0x00; |
| 215 | |
| 216 | /* Identifier/Designator type == NAA identifier */ |
| 217 | buf[off++] = 0x3; |
| 218 | off++; |
| 219 | |
| 220 | /* Identifier/Designator length */ |
| 221 | buf[off++] = 0x10; |
| 222 | |
| 223 | /* |
| 224 | * Start NAA IEEE Registered Extended Identifier/Designator |
| 225 | */ |
| 226 | buf[off++] = (0x6 << 4); |
| 227 | |
| 228 | /* |
| 229 | * Use OpenFabrics IEEE Company ID: 00 14 05 |
| 230 | */ |
| 231 | buf[off++] = 0x01; |
| 232 | buf[off++] = 0x40; |
| 233 | buf[off] = (0x5 << 4); |
| 234 | |
| 235 | /* |
| 236 | * Return ConfigFS Unit Serial Number information for |
| 237 | * VENDOR_SPECIFIC_IDENTIFIER and |
| 238 | * VENDOR_SPECIFIC_IDENTIFIER_EXTENTION |
| 239 | */ |
| 240 | binary = transport_asciihex_to_binaryhex( |
| 241 | &DEV_T10_WWN(dev)->unit_serial[0]); |
| 242 | buf[off++] |= (binary & 0xf0) >> 4; |
| 243 | for (i = 0; i < 24; i += 2) { |
| 244 | binary_new = transport_asciihex_to_binaryhex( |
| 245 | &DEV_T10_WWN(dev)->unit_serial[i+2]); |
| 246 | buf[off] = (binary & 0x0f) << 4; |
| 247 | buf[off++] |= (binary_new & 0xf0) >> 4; |
| 248 | binary = binary_new; |
| 249 | } |
| 250 | len = 20; |
| 251 | off = (len + 4); |
| 252 | |
| 253 | check_t10_vend_desc: |
| 254 | /* |
| 255 | * T10 Vendor Identifier Page, see spc4r17 section 7.7.3.4 |
| 256 | */ |
| 257 | id_len = 8; /* For Vendor field */ |
| 258 | prod_len = 4; /* For VPD Header */ |
| 259 | prod_len += 8; /* For Vendor field */ |
| 260 | prod_len += strlen(prod); |
| 261 | prod_len++; /* For : */ |
| 262 | |
| 263 | if (dev->se_sub_dev->su_dev_flags & |
| 264 | SDF_EMULATED_VPD_UNIT_SERIAL) { |
| 265 | unit_serial_len = |
| 266 | strlen(&DEV_T10_WWN(dev)->unit_serial[0]); |
| 267 | unit_serial_len++; /* For NULL Terminator */ |
| 268 | |
| 269 | if ((len + (id_len + 4) + |
| 270 | (prod_len + unit_serial_len)) > |
| 271 | cmd->data_length) { |
| 272 | len += (prod_len + unit_serial_len); |
| 273 | goto check_port; |
| 274 | } |
| 275 | id_len += sprintf((unsigned char *)&buf[off+12], |
| 276 | "%s:%s", prod, |
| 277 | &DEV_T10_WWN(dev)->unit_serial[0]); |
| 278 | } |
| 279 | buf[off] = 0x2; /* ASCII */ |
| 280 | buf[off+1] = 0x1; /* T10 Vendor ID */ |
| 281 | buf[off+2] = 0x0; |
| 282 | memcpy((unsigned char *)&buf[off+4], "LIO-ORG", 8); |
| 283 | /* Extra Byte for NULL Terminator */ |
| 284 | id_len++; |
| 285 | /* Identifier Length */ |
| 286 | buf[off+3] = id_len; |
| 287 | /* Header size for Designation descriptor */ |
| 288 | len += (id_len + 4); |
| 289 | off += (id_len + 4); |
| 290 | /* |
| 291 | * struct se_port is only set for INQUIRY VPD=1 through $FABRIC_MOD |
| 292 | */ |
| 293 | check_port: |
| 294 | port = lun->lun_sep; |
| 295 | if (port) { |
| 296 | struct t10_alua_lu_gp *lu_gp; |
| 297 | u32 padding, scsi_name_len; |
| 298 | u16 lu_gp_id = 0; |
| 299 | u16 tg_pt_gp_id = 0; |
| 300 | u16 tpgt; |
| 301 | |
| 302 | tpg = port->sep_tpg; |
| 303 | /* |
| 304 | * Relative target port identifer, see spc4r17 |
| 305 | * section 7.7.3.7 |
| 306 | * |
| 307 | * Get the PROTOCOL IDENTIFIER as defined by spc4r17 |
| 308 | * section 7.5.1 Table 362 |
| 309 | */ |
| 310 | if (((len + 4) + 8) > cmd->data_length) { |
| 311 | len += 8; |
| 312 | goto check_tpgi; |
| 313 | } |
| 314 | buf[off] = |
| 315 | (TPG_TFO(tpg)->get_fabric_proto_ident(tpg) << 4); |
| 316 | buf[off++] |= 0x1; /* CODE SET == Binary */ |
| 317 | buf[off] = 0x80; /* Set PIV=1 */ |
| 318 | /* Set ASSOICATION == target port: 01b */ |
| 319 | buf[off] |= 0x10; |
| 320 | /* DESIGNATOR TYPE == Relative target port identifer */ |
| 321 | buf[off++] |= 0x4; |
| 322 | off++; /* Skip over Reserved */ |
| 323 | buf[off++] = 4; /* DESIGNATOR LENGTH */ |
| 324 | /* Skip over Obsolete field in RTPI payload |
| 325 | * in Table 472 */ |
| 326 | off += 2; |
| 327 | buf[off++] = ((port->sep_rtpi >> 8) & 0xff); |
| 328 | buf[off++] = (port->sep_rtpi & 0xff); |
| 329 | len += 8; /* Header size + Designation descriptor */ |
| 330 | /* |
| 331 | * Target port group identifier, see spc4r17 |
| 332 | * section 7.7.3.8 |
| 333 | * |
| 334 | * Get the PROTOCOL IDENTIFIER as defined by spc4r17 |
| 335 | * section 7.5.1 Table 362 |
| 336 | */ |
| 337 | check_tpgi: |
| 338 | if (T10_ALUA(dev->se_sub_dev)->alua_type != |
| 339 | SPC3_ALUA_EMULATED) |
| 340 | goto check_scsi_name; |
| 341 | |
| 342 | if (((len + 4) + 8) > cmd->data_length) { |
| 343 | len += 8; |
| 344 | goto check_lu_gp; |
| 345 | } |
| 346 | tg_pt_gp_mem = port->sep_alua_tg_pt_gp_mem; |
| 347 | if (!tg_pt_gp_mem) |
| 348 | goto check_lu_gp; |
| 349 | |
| 350 | spin_lock(&tg_pt_gp_mem->tg_pt_gp_mem_lock); |
| 351 | tg_pt_gp = tg_pt_gp_mem->tg_pt_gp; |
| 352 | if (!(tg_pt_gp)) { |
| 353 | spin_unlock(&tg_pt_gp_mem->tg_pt_gp_mem_lock); |
| 354 | goto check_lu_gp; |
| 355 | } |
| 356 | tg_pt_gp_id = tg_pt_gp->tg_pt_gp_id; |
| 357 | spin_unlock(&tg_pt_gp_mem->tg_pt_gp_mem_lock); |
| 358 | |
| 359 | buf[off] = |
| 360 | (TPG_TFO(tpg)->get_fabric_proto_ident(tpg) << 4); |
| 361 | buf[off++] |= 0x1; /* CODE SET == Binary */ |
| 362 | buf[off] = 0x80; /* Set PIV=1 */ |
| 363 | /* Set ASSOICATION == target port: 01b */ |
| 364 | buf[off] |= 0x10; |
| 365 | /* DESIGNATOR TYPE == Target port group identifier */ |
| 366 | buf[off++] |= 0x5; |
| 367 | off++; /* Skip over Reserved */ |
| 368 | buf[off++] = 4; /* DESIGNATOR LENGTH */ |
| 369 | off += 2; /* Skip over Reserved Field */ |
| 370 | buf[off++] = ((tg_pt_gp_id >> 8) & 0xff); |
| 371 | buf[off++] = (tg_pt_gp_id & 0xff); |
| 372 | len += 8; /* Header size + Designation descriptor */ |
| 373 | /* |
| 374 | * Logical Unit Group identifier, see spc4r17 |
| 375 | * section 7.7.3.8 |
| 376 | */ |
| 377 | check_lu_gp: |
| 378 | if (((len + 4) + 8) > cmd->data_length) { |
| 379 | len += 8; |
| 380 | goto check_scsi_name; |
| 381 | } |
| 382 | lu_gp_mem = dev->dev_alua_lu_gp_mem; |
| 383 | if (!(lu_gp_mem)) |
| 384 | goto check_scsi_name; |
| 385 | |
| 386 | spin_lock(&lu_gp_mem->lu_gp_mem_lock); |
| 387 | lu_gp = lu_gp_mem->lu_gp; |
| 388 | if (!(lu_gp)) { |
| 389 | spin_unlock(&lu_gp_mem->lu_gp_mem_lock); |
| 390 | goto check_scsi_name; |
| 391 | } |
| 392 | lu_gp_id = lu_gp->lu_gp_id; |
| 393 | spin_unlock(&lu_gp_mem->lu_gp_mem_lock); |
| 394 | |
| 395 | buf[off++] |= 0x1; /* CODE SET == Binary */ |
| 396 | /* DESIGNATOR TYPE == Logical Unit Group identifier */ |
| 397 | buf[off++] |= 0x6; |
| 398 | off++; /* Skip over Reserved */ |
| 399 | buf[off++] = 4; /* DESIGNATOR LENGTH */ |
| 400 | off += 2; /* Skip over Reserved Field */ |
| 401 | buf[off++] = ((lu_gp_id >> 8) & 0xff); |
| 402 | buf[off++] = (lu_gp_id & 0xff); |
| 403 | len += 8; /* Header size + Designation descriptor */ |
| 404 | /* |
| 405 | * SCSI name string designator, see spc4r17 |
| 406 | * section 7.7.3.11 |
| 407 | * |
| 408 | * Get the PROTOCOL IDENTIFIER as defined by spc4r17 |
| 409 | * section 7.5.1 Table 362 |
| 410 | */ |
| 411 | check_scsi_name: |
| 412 | scsi_name_len = strlen(TPG_TFO(tpg)->tpg_get_wwn(tpg)); |
| 413 | /* UTF-8 ",t,0x<16-bit TPGT>" + NULL Terminator */ |
| 414 | scsi_name_len += 10; |
| 415 | /* Check for 4-byte padding */ |
| 416 | padding = ((-scsi_name_len) & 3); |
| 417 | if (padding != 0) |
| 418 | scsi_name_len += padding; |
| 419 | /* Header size + Designation descriptor */ |
| 420 | scsi_name_len += 4; |
| 421 | |
| 422 | if (((len + 4) + scsi_name_len) > cmd->data_length) { |
| 423 | len += scsi_name_len; |
| 424 | goto set_len; |
| 425 | } |
| 426 | buf[off] = |
| 427 | (TPG_TFO(tpg)->get_fabric_proto_ident(tpg) << 4); |
| 428 | buf[off++] |= 0x3; /* CODE SET == UTF-8 */ |
| 429 | buf[off] = 0x80; /* Set PIV=1 */ |
| 430 | /* Set ASSOICATION == target port: 01b */ |
| 431 | buf[off] |= 0x10; |
| 432 | /* DESIGNATOR TYPE == SCSI name string */ |
| 433 | buf[off++] |= 0x8; |
| 434 | off += 2; /* Skip over Reserved and length */ |
| 435 | /* |
| 436 | * SCSI name string identifer containing, $FABRIC_MOD |
| 437 | * dependent information. For LIO-Target and iSCSI |
| 438 | * Target Port, this means "<iSCSI name>,t,0x<TPGT> in |
| 439 | * UTF-8 encoding. |
| 440 | */ |
| 441 | tpgt = TPG_TFO(tpg)->tpg_get_tag(tpg); |
| 442 | scsi_name_len = sprintf(&buf[off], "%s,t,0x%04x", |
| 443 | TPG_TFO(tpg)->tpg_get_wwn(tpg), tpgt); |
| 444 | scsi_name_len += 1 /* Include NULL terminator */; |
| 445 | /* |
| 446 | * The null-terminated, null-padded (see 4.4.2) SCSI |
| 447 | * NAME STRING field contains a UTF-8 format string. |
| 448 | * The number of bytes in the SCSI NAME STRING field |
| 449 | * (i.e., the value in the DESIGNATOR LENGTH field) |
| 450 | * shall be no larger than 256 and shall be a multiple |
| 451 | * of four. |
| 452 | */ |
| 453 | if (padding) |
| 454 | scsi_name_len += padding; |
| 455 | |
| 456 | buf[off-1] = scsi_name_len; |
| 457 | off += scsi_name_len; |
| 458 | /* Header size + Designation descriptor */ |
| 459 | len += (scsi_name_len + 4); |
| 460 | } |
| 461 | set_len: |
| 462 | buf[2] = ((len >> 8) & 0xff); |
| 463 | buf[3] = (len & 0xff); /* Page Length for VPD 0x83 */ |
| 464 | return 0; |
| 465 | } |
| 466 | |
| 467 | /* Extended INQUIRY Data VPD Page */ |
| 468 | static int |
| 469 | target_emulate_evpd_86(struct se_cmd *cmd, unsigned char *buf) |
| 470 | { |
| 471 | if (cmd->data_length < 60) |
| 472 | return 0; |
| 473 | |
| 474 | buf[1] = 0x86; |
| 475 | buf[2] = 0x3c; |
| 476 | /* Set HEADSUP, ORDSUP, SIMPSUP */ |
| 477 | buf[5] = 0x07; |
| 478 | |
| 479 | /* If WriteCache emulation is enabled, set V_SUP */ |
| 480 | if (DEV_ATTRIB(SE_DEV(cmd))->emulate_write_cache > 0) |
| 481 | buf[6] = 0x01; |
| 482 | return 0; |
| 483 | } |
| 484 | |
| 485 | /* Block Limits VPD page */ |
| 486 | static int |
| 487 | target_emulate_evpd_b0(struct se_cmd *cmd, unsigned char *buf) |
| 488 | { |
| 489 | struct se_device *dev = SE_DEV(cmd); |
| 490 | int have_tp = 0; |
| 491 | |
| 492 | /* |
| 493 | * Following sbc3r22 section 6.5.3 Block Limits VPD page, when |
| 494 | * emulate_tpu=1 or emulate_tpws=1 we will be expect a |
| 495 | * different page length for Thin Provisioning. |
| 496 | */ |
| 497 | if (DEV_ATTRIB(dev)->emulate_tpu || DEV_ATTRIB(dev)->emulate_tpws) |
| 498 | have_tp = 1; |
| 499 | |
| 500 | if (cmd->data_length < (0x10 + 4)) { |
| 501 | printk(KERN_INFO "Received data_length: %u" |
| 502 | " too small for EVPD 0xb0\n", |
| 503 | cmd->data_length); |
| 504 | return -1; |
| 505 | } |
| 506 | |
| 507 | if (have_tp && cmd->data_length < (0x3c + 4)) { |
| 508 | printk(KERN_INFO "Received data_length: %u" |
| 509 | " too small for TPE=1 EVPD 0xb0\n", |
| 510 | cmd->data_length); |
| 511 | have_tp = 0; |
| 512 | } |
| 513 | |
| 514 | buf[0] = dev->transport->get_device_type(dev); |
| 515 | buf[1] = 0xb0; |
| 516 | buf[3] = have_tp ? 0x3c : 0x10; |
| 517 | |
| 518 | /* |
| 519 | * Set OPTIMAL TRANSFER LENGTH GRANULARITY |
| 520 | */ |
| 521 | put_unaligned_be16(1, &buf[6]); |
| 522 | |
| 523 | /* |
| 524 | * Set MAXIMUM TRANSFER LENGTH |
| 525 | */ |
| 526 | put_unaligned_be32(DEV_ATTRIB(dev)->max_sectors, &buf[8]); |
| 527 | |
| 528 | /* |
| 529 | * Set OPTIMAL TRANSFER LENGTH |
| 530 | */ |
| 531 | put_unaligned_be32(DEV_ATTRIB(dev)->optimal_sectors, &buf[12]); |
| 532 | |
| 533 | /* |
| 534 | * Exit now if we don't support TP or the initiator sent a too |
| 535 | * short buffer. |
| 536 | */ |
| 537 | if (!have_tp || cmd->data_length < (0x3c + 4)) |
| 538 | return 0; |
| 539 | |
| 540 | /* |
| 541 | * Set MAXIMUM UNMAP LBA COUNT |
| 542 | */ |
| 543 | put_unaligned_be32(DEV_ATTRIB(dev)->max_unmap_lba_count, &buf[20]); |
| 544 | |
| 545 | /* |
| 546 | * Set MAXIMUM UNMAP BLOCK DESCRIPTOR COUNT |
| 547 | */ |
| 548 | put_unaligned_be32(DEV_ATTRIB(dev)->max_unmap_block_desc_count, |
| 549 | &buf[24]); |
| 550 | |
| 551 | /* |
| 552 | * Set OPTIMAL UNMAP GRANULARITY |
| 553 | */ |
| 554 | put_unaligned_be32(DEV_ATTRIB(dev)->unmap_granularity, &buf[28]); |
| 555 | |
| 556 | /* |
| 557 | * UNMAP GRANULARITY ALIGNMENT |
| 558 | */ |
| 559 | put_unaligned_be32(DEV_ATTRIB(dev)->unmap_granularity_alignment, |
| 560 | &buf[32]); |
| 561 | if (DEV_ATTRIB(dev)->unmap_granularity_alignment != 0) |
| 562 | buf[32] |= 0x80; /* Set the UGAVALID bit */ |
| 563 | |
| 564 | return 0; |
| 565 | } |
| 566 | |
| 567 | /* Thin Provisioning VPD */ |
| 568 | static int |
| 569 | target_emulate_evpd_b2(struct se_cmd *cmd, unsigned char *buf) |
| 570 | { |
| 571 | struct se_device *dev = SE_DEV(cmd); |
| 572 | |
| 573 | /* |
| 574 | * From sbc3r22 section 6.5.4 Thin Provisioning VPD page: |
| 575 | * |
| 576 | * The PAGE LENGTH field is defined in SPC-4. If the DP bit is set to |
| 577 | * zero, then the page length shall be set to 0004h. If the DP bit |
| 578 | * is set to one, then the page length shall be set to the value |
| 579 | * defined in table 162. |
| 580 | */ |
| 581 | buf[0] = dev->transport->get_device_type(dev); |
| 582 | buf[1] = 0xb2; |
| 583 | |
| 584 | /* |
| 585 | * Set Hardcoded length mentioned above for DP=0 |
| 586 | */ |
| 587 | put_unaligned_be16(0x0004, &buf[2]); |
| 588 | |
| 589 | /* |
| 590 | * The THRESHOLD EXPONENT field indicates the threshold set size in |
| 591 | * LBAs as a power of 2 (i.e., the threshold set size is equal to |
| 592 | * 2(threshold exponent)). |
| 593 | * |
| 594 | * Note that this is currently set to 0x00 as mkp says it will be |
| 595 | * changing again. We can enable this once it has settled in T10 |
| 596 | * and is actually used by Linux/SCSI ML code. |
| 597 | */ |
| 598 | buf[4] = 0x00; |
| 599 | |
| 600 | /* |
| 601 | * A TPU bit set to one indicates that the device server supports |
| 602 | * the UNMAP command (see 5.25). A TPU bit set to zero indicates |
| 603 | * that the device server does not support the UNMAP command. |
| 604 | */ |
| 605 | if (DEV_ATTRIB(dev)->emulate_tpu != 0) |
| 606 | buf[5] = 0x80; |
| 607 | |
| 608 | /* |
| 609 | * A TPWS bit set to one indicates that the device server supports |
| 610 | * the use of the WRITE SAME (16) command (see 5.42) to unmap LBAs. |
| 611 | * A TPWS bit set to zero indicates that the device server does not |
| 612 | * support the use of the WRITE SAME (16) command to unmap LBAs. |
| 613 | */ |
| 614 | if (DEV_ATTRIB(dev)->emulate_tpws != 0) |
| 615 | buf[5] |= 0x40; |
| 616 | |
| 617 | return 0; |
| 618 | } |
| 619 | |
| 620 | static int |
| 621 | target_emulate_inquiry(struct se_cmd *cmd) |
| 622 | { |
| 623 | struct se_device *dev = SE_DEV(cmd); |
| 624 | unsigned char *buf = cmd->t_task->t_task_buf; |
| 625 | unsigned char *cdb = cmd->t_task->t_task_cdb; |
| 626 | |
| 627 | if (!(cdb[1] & 0x1)) |
| 628 | return target_emulate_inquiry_std(cmd); |
| 629 | |
| 630 | /* |
| 631 | * Make sure we at least have 4 bytes of INQUIRY response |
| 632 | * payload for 0x00 going back for EVPD=1. Note that 0x80 |
| 633 | * and 0x83 will check for enough payload data length and |
| 634 | * jump to set_len: label when there is not enough inquiry EVPD |
| 635 | * payload length left for the next outgoing EVPD metadata |
| 636 | */ |
| 637 | if (cmd->data_length < 4) { |
| 638 | printk(KERN_ERR "SCSI Inquiry payload length: %u" |
| 639 | " too small for EVPD=1\n", cmd->data_length); |
| 640 | return -1; |
| 641 | } |
| 642 | buf[0] = dev->transport->get_device_type(dev); |
| 643 | |
| 644 | switch (cdb[2]) { |
| 645 | case 0x00: |
| 646 | return target_emulate_evpd_00(cmd, buf); |
| 647 | case 0x80: |
| 648 | return target_emulate_evpd_80(cmd, buf); |
| 649 | case 0x83: |
| 650 | return target_emulate_evpd_83(cmd, buf); |
| 651 | case 0x86: |
| 652 | return target_emulate_evpd_86(cmd, buf); |
| 653 | case 0xb0: |
| 654 | return target_emulate_evpd_b0(cmd, buf); |
| 655 | case 0xb2: |
| 656 | return target_emulate_evpd_b2(cmd, buf); |
| 657 | default: |
| 658 | printk(KERN_ERR "Unknown VPD Code: 0x%02x\n", cdb[2]); |
| 659 | return -1; |
| 660 | } |
| 661 | |
| 662 | return 0; |
| 663 | } |
| 664 | |
| 665 | static int |
| 666 | target_emulate_readcapacity(struct se_cmd *cmd) |
| 667 | { |
| 668 | struct se_device *dev = SE_DEV(cmd); |
| 669 | unsigned char *buf = cmd->t_task->t_task_buf; |
Nicholas Bellinger | 904f0bc | 2011-03-02 15:52:51 -0800 | [diff] [blame] | 670 | unsigned long long blocks_long = dev->transport->get_blocks(dev); |
| 671 | u32 blocks; |
| 672 | |
| 673 | if (blocks_long >= 0x00000000ffffffff) |
| 674 | blocks = 0xffffffff; |
| 675 | else |
| 676 | blocks = (u32)blocks_long; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 677 | |
| 678 | buf[0] = (blocks >> 24) & 0xff; |
| 679 | buf[1] = (blocks >> 16) & 0xff; |
| 680 | buf[2] = (blocks >> 8) & 0xff; |
| 681 | buf[3] = blocks & 0xff; |
| 682 | buf[4] = (DEV_ATTRIB(dev)->block_size >> 24) & 0xff; |
| 683 | buf[5] = (DEV_ATTRIB(dev)->block_size >> 16) & 0xff; |
| 684 | buf[6] = (DEV_ATTRIB(dev)->block_size >> 8) & 0xff; |
| 685 | buf[7] = DEV_ATTRIB(dev)->block_size & 0xff; |
| 686 | /* |
| 687 | * Set max 32-bit blocks to signal SERVICE ACTION READ_CAPACITY_16 |
| 688 | */ |
| 689 | if (DEV_ATTRIB(dev)->emulate_tpu || DEV_ATTRIB(dev)->emulate_tpws) |
| 690 | put_unaligned_be32(0xFFFFFFFF, &buf[0]); |
| 691 | |
| 692 | return 0; |
| 693 | } |
| 694 | |
| 695 | static int |
| 696 | target_emulate_readcapacity_16(struct se_cmd *cmd) |
| 697 | { |
| 698 | struct se_device *dev = SE_DEV(cmd); |
| 699 | unsigned char *buf = cmd->t_task->t_task_buf; |
| 700 | unsigned long long blocks = dev->transport->get_blocks(dev); |
| 701 | |
| 702 | buf[0] = (blocks >> 56) & 0xff; |
| 703 | buf[1] = (blocks >> 48) & 0xff; |
| 704 | buf[2] = (blocks >> 40) & 0xff; |
| 705 | buf[3] = (blocks >> 32) & 0xff; |
| 706 | buf[4] = (blocks >> 24) & 0xff; |
| 707 | buf[5] = (blocks >> 16) & 0xff; |
| 708 | buf[6] = (blocks >> 8) & 0xff; |
| 709 | buf[7] = blocks & 0xff; |
| 710 | buf[8] = (DEV_ATTRIB(dev)->block_size >> 24) & 0xff; |
| 711 | buf[9] = (DEV_ATTRIB(dev)->block_size >> 16) & 0xff; |
| 712 | buf[10] = (DEV_ATTRIB(dev)->block_size >> 8) & 0xff; |
| 713 | buf[11] = DEV_ATTRIB(dev)->block_size & 0xff; |
| 714 | /* |
| 715 | * Set Thin Provisioning Enable bit following sbc3r22 in section |
| 716 | * READ CAPACITY (16) byte 14 if emulate_tpu or emulate_tpws is enabled. |
| 717 | */ |
| 718 | if (DEV_ATTRIB(dev)->emulate_tpu || DEV_ATTRIB(dev)->emulate_tpws) |
| 719 | buf[14] = 0x80; |
| 720 | |
| 721 | return 0; |
| 722 | } |
| 723 | |
| 724 | static int |
| 725 | target_modesense_rwrecovery(unsigned char *p) |
| 726 | { |
| 727 | p[0] = 0x01; |
| 728 | p[1] = 0x0a; |
| 729 | |
| 730 | return 12; |
| 731 | } |
| 732 | |
| 733 | static int |
| 734 | target_modesense_control(struct se_device *dev, unsigned char *p) |
| 735 | { |
| 736 | p[0] = 0x0a; |
| 737 | p[1] = 0x0a; |
| 738 | p[2] = 2; |
| 739 | /* |
| 740 | * From spc4r17, section 7.4.6 Control mode Page |
| 741 | * |
| 742 | * Unit Attention interlocks control (UN_INTLCK_CTRL) to code 00b |
| 743 | * |
| 744 | * 00b: The logical unit shall clear any unit attention condition |
| 745 | * reported in the same I_T_L_Q nexus transaction as a CHECK CONDITION |
| 746 | * status and shall not establish a unit attention condition when a com- |
| 747 | * mand is completed with BUSY, TASK SET FULL, or RESERVATION CONFLICT |
| 748 | * status. |
| 749 | * |
| 750 | * 10b: The logical unit shall not clear any unit attention condition |
| 751 | * reported in the same I_T_L_Q nexus transaction as a CHECK CONDITION |
| 752 | * status and shall not establish a unit attention condition when |
| 753 | * a command is completed with BUSY, TASK SET FULL, or RESERVATION |
| 754 | * CONFLICT status. |
| 755 | * |
| 756 | * 11b a The logical unit shall not clear any unit attention condition |
| 757 | * reported in the same I_T_L_Q nexus transaction as a CHECK CONDITION |
| 758 | * status and shall establish a unit attention condition for the |
| 759 | * initiator port associated with the I_T nexus on which the BUSY, |
| 760 | * TASK SET FULL, or RESERVATION CONFLICT status is being returned. |
| 761 | * Depending on the status, the additional sense code shall be set to |
| 762 | * PREVIOUS BUSY STATUS, PREVIOUS TASK SET FULL STATUS, or PREVIOUS |
| 763 | * RESERVATION CONFLICT STATUS. Until it is cleared by a REQUEST SENSE |
| 764 | * command, a unit attention condition shall be established only once |
| 765 | * for a BUSY, TASK SET FULL, or RESERVATION CONFLICT status regardless |
| 766 | * to the number of commands completed with one of those status codes. |
| 767 | */ |
| 768 | p[4] = (DEV_ATTRIB(dev)->emulate_ua_intlck_ctrl == 2) ? 0x30 : |
| 769 | (DEV_ATTRIB(dev)->emulate_ua_intlck_ctrl == 1) ? 0x20 : 0x00; |
| 770 | /* |
| 771 | * From spc4r17, section 7.4.6 Control mode Page |
| 772 | * |
| 773 | * Task Aborted Status (TAS) bit set to zero. |
| 774 | * |
| 775 | * A task aborted status (TAS) bit set to zero specifies that aborted |
| 776 | * tasks shall be terminated by the device server without any response |
| 777 | * to the application client. A TAS bit set to one specifies that tasks |
| 778 | * aborted by the actions of an I_T nexus other than the I_T nexus on |
| 779 | * which the command was received shall be completed with TASK ABORTED |
| 780 | * status (see SAM-4). |
| 781 | */ |
| 782 | p[5] = (DEV_ATTRIB(dev)->emulate_tas) ? 0x40 : 0x00; |
| 783 | p[8] = 0xff; |
| 784 | p[9] = 0xff; |
| 785 | p[11] = 30; |
| 786 | |
| 787 | return 12; |
| 788 | } |
| 789 | |
| 790 | static int |
| 791 | target_modesense_caching(struct se_device *dev, unsigned char *p) |
| 792 | { |
| 793 | p[0] = 0x08; |
| 794 | p[1] = 0x12; |
| 795 | if (DEV_ATTRIB(dev)->emulate_write_cache > 0) |
| 796 | p[2] = 0x04; /* Write Cache Enable */ |
| 797 | p[12] = 0x20; /* Disabled Read Ahead */ |
| 798 | |
| 799 | return 20; |
| 800 | } |
| 801 | |
| 802 | static void |
| 803 | target_modesense_write_protect(unsigned char *buf, int type) |
| 804 | { |
| 805 | /* |
| 806 | * I believe that the WP bit (bit 7) in the mode header is the same for |
| 807 | * all device types.. |
| 808 | */ |
| 809 | switch (type) { |
| 810 | case TYPE_DISK: |
| 811 | case TYPE_TAPE: |
| 812 | default: |
| 813 | buf[0] |= 0x80; /* WP bit */ |
| 814 | break; |
| 815 | } |
| 816 | } |
| 817 | |
| 818 | static void |
| 819 | target_modesense_dpofua(unsigned char *buf, int type) |
| 820 | { |
| 821 | switch (type) { |
| 822 | case TYPE_DISK: |
| 823 | buf[0] |= 0x10; /* DPOFUA bit */ |
| 824 | break; |
| 825 | default: |
| 826 | break; |
| 827 | } |
| 828 | } |
| 829 | |
| 830 | static int |
| 831 | target_emulate_modesense(struct se_cmd *cmd, int ten) |
| 832 | { |
| 833 | struct se_device *dev = SE_DEV(cmd); |
| 834 | char *cdb = cmd->t_task->t_task_cdb; |
| 835 | unsigned char *rbuf = cmd->t_task->t_task_buf; |
| 836 | int type = dev->transport->get_device_type(dev); |
| 837 | int offset = (ten) ? 8 : 4; |
| 838 | int length = 0; |
| 839 | unsigned char buf[SE_MODE_PAGE_BUF]; |
| 840 | |
| 841 | memset(buf, 0, SE_MODE_PAGE_BUF); |
| 842 | |
| 843 | switch (cdb[2] & 0x3f) { |
| 844 | case 0x01: |
| 845 | length = target_modesense_rwrecovery(&buf[offset]); |
| 846 | break; |
| 847 | case 0x08: |
| 848 | length = target_modesense_caching(dev, &buf[offset]); |
| 849 | break; |
| 850 | case 0x0a: |
| 851 | length = target_modesense_control(dev, &buf[offset]); |
| 852 | break; |
| 853 | case 0x3f: |
| 854 | length = target_modesense_rwrecovery(&buf[offset]); |
| 855 | length += target_modesense_caching(dev, &buf[offset+length]); |
| 856 | length += target_modesense_control(dev, &buf[offset+length]); |
| 857 | break; |
| 858 | default: |
| 859 | printk(KERN_ERR "Got Unknown Mode Page: 0x%02x\n", |
| 860 | cdb[2] & 0x3f); |
| 861 | return PYX_TRANSPORT_UNKNOWN_MODE_PAGE; |
| 862 | } |
| 863 | offset += length; |
| 864 | |
| 865 | if (ten) { |
| 866 | offset -= 2; |
| 867 | buf[0] = (offset >> 8) & 0xff; |
| 868 | buf[1] = offset & 0xff; |
| 869 | |
| 870 | if ((SE_LUN(cmd)->lun_access & TRANSPORT_LUNFLAGS_READ_ONLY) || |
| 871 | (cmd->se_deve && |
| 872 | (cmd->se_deve->lun_flags & TRANSPORT_LUNFLAGS_READ_ONLY))) |
| 873 | target_modesense_write_protect(&buf[3], type); |
| 874 | |
| 875 | if ((DEV_ATTRIB(dev)->emulate_write_cache > 0) && |
| 876 | (DEV_ATTRIB(dev)->emulate_fua_write > 0)) |
| 877 | target_modesense_dpofua(&buf[3], type); |
| 878 | |
| 879 | if ((offset + 2) > cmd->data_length) |
| 880 | offset = cmd->data_length; |
| 881 | |
| 882 | } else { |
| 883 | offset -= 1; |
| 884 | buf[0] = offset & 0xff; |
| 885 | |
| 886 | if ((SE_LUN(cmd)->lun_access & TRANSPORT_LUNFLAGS_READ_ONLY) || |
| 887 | (cmd->se_deve && |
| 888 | (cmd->se_deve->lun_flags & TRANSPORT_LUNFLAGS_READ_ONLY))) |
| 889 | target_modesense_write_protect(&buf[2], type); |
| 890 | |
| 891 | if ((DEV_ATTRIB(dev)->emulate_write_cache > 0) && |
| 892 | (DEV_ATTRIB(dev)->emulate_fua_write > 0)) |
| 893 | target_modesense_dpofua(&buf[2], type); |
| 894 | |
| 895 | if ((offset + 1) > cmd->data_length) |
| 896 | offset = cmd->data_length; |
| 897 | } |
| 898 | memcpy(rbuf, buf, offset); |
| 899 | |
| 900 | return 0; |
| 901 | } |
| 902 | |
| 903 | static int |
| 904 | target_emulate_request_sense(struct se_cmd *cmd) |
| 905 | { |
| 906 | unsigned char *cdb = cmd->t_task->t_task_cdb; |
| 907 | unsigned char *buf = cmd->t_task->t_task_buf; |
| 908 | u8 ua_asc = 0, ua_ascq = 0; |
| 909 | |
| 910 | if (cdb[1] & 0x01) { |
| 911 | printk(KERN_ERR "REQUEST_SENSE description emulation not" |
| 912 | " supported\n"); |
| 913 | return PYX_TRANSPORT_INVALID_CDB_FIELD; |
| 914 | } |
| 915 | if (!(core_scsi3_ua_clear_for_request_sense(cmd, &ua_asc, &ua_ascq))) { |
| 916 | /* |
| 917 | * CURRENT ERROR, UNIT ATTENTION |
| 918 | */ |
| 919 | buf[0] = 0x70; |
| 920 | buf[SPC_SENSE_KEY_OFFSET] = UNIT_ATTENTION; |
| 921 | /* |
| 922 | * Make sure request data length is enough for additional |
| 923 | * sense data. |
| 924 | */ |
| 925 | if (cmd->data_length <= 18) { |
| 926 | buf[7] = 0x00; |
| 927 | return 0; |
| 928 | } |
| 929 | /* |
| 930 | * The Additional Sense Code (ASC) from the UNIT ATTENTION |
| 931 | */ |
| 932 | buf[SPC_ASC_KEY_OFFSET] = ua_asc; |
| 933 | buf[SPC_ASCQ_KEY_OFFSET] = ua_ascq; |
| 934 | buf[7] = 0x0A; |
| 935 | } else { |
| 936 | /* |
| 937 | * CURRENT ERROR, NO SENSE |
| 938 | */ |
| 939 | buf[0] = 0x70; |
| 940 | buf[SPC_SENSE_KEY_OFFSET] = NO_SENSE; |
| 941 | /* |
| 942 | * Make sure request data length is enough for additional |
| 943 | * sense data. |
| 944 | */ |
| 945 | if (cmd->data_length <= 18) { |
| 946 | buf[7] = 0x00; |
| 947 | return 0; |
| 948 | } |
| 949 | /* |
| 950 | * NO ADDITIONAL SENSE INFORMATION |
| 951 | */ |
| 952 | buf[SPC_ASC_KEY_OFFSET] = 0x00; |
| 953 | buf[7] = 0x0A; |
| 954 | } |
| 955 | |
| 956 | return 0; |
| 957 | } |
| 958 | |
| 959 | /* |
| 960 | * Used for TCM/IBLOCK and TCM/FILEIO for block/blk-lib.c level discard support. |
| 961 | * Note this is not used for TCM/pSCSI passthrough |
| 962 | */ |
| 963 | static int |
| 964 | target_emulate_unmap(struct se_task *task) |
| 965 | { |
| 966 | struct se_cmd *cmd = TASK_CMD(task); |
| 967 | struct se_device *dev = SE_DEV(cmd); |
| 968 | unsigned char *buf = cmd->t_task->t_task_buf, *ptr = NULL; |
| 969 | unsigned char *cdb = &cmd->t_task->t_task_cdb[0]; |
| 970 | sector_t lba; |
| 971 | unsigned int size = cmd->data_length, range; |
| 972 | int ret, offset; |
| 973 | unsigned short dl, bd_dl; |
| 974 | |
| 975 | /* First UNMAP block descriptor starts at 8 byte offset */ |
| 976 | offset = 8; |
| 977 | size -= 8; |
| 978 | dl = get_unaligned_be16(&cdb[0]); |
| 979 | bd_dl = get_unaligned_be16(&cdb[2]); |
| 980 | ptr = &buf[offset]; |
| 981 | printk(KERN_INFO "UNMAP: Sub: %s Using dl: %hu bd_dl: %hu size: %hu" |
| 982 | " ptr: %p\n", dev->transport->name, dl, bd_dl, size, ptr); |
| 983 | |
| 984 | while (size) { |
| 985 | lba = get_unaligned_be64(&ptr[0]); |
| 986 | range = get_unaligned_be32(&ptr[8]); |
| 987 | printk(KERN_INFO "UNMAP: Using lba: %llu and range: %u\n", |
| 988 | (unsigned long long)lba, range); |
| 989 | |
| 990 | ret = dev->transport->do_discard(dev, lba, range); |
| 991 | if (ret < 0) { |
| 992 | printk(KERN_ERR "blkdev_issue_discard() failed: %d\n", |
| 993 | ret); |
| 994 | return -1; |
| 995 | } |
| 996 | |
| 997 | ptr += 16; |
| 998 | size -= 16; |
| 999 | } |
| 1000 | |
| 1001 | task->task_scsi_status = GOOD; |
| 1002 | transport_complete_task(task, 1); |
| 1003 | return 0; |
| 1004 | } |
| 1005 | |
| 1006 | /* |
| 1007 | * Used for TCM/IBLOCK and TCM/FILEIO for block/blk-lib.c level discard support. |
| 1008 | * Note this is not used for TCM/pSCSI passthrough |
| 1009 | */ |
| 1010 | static int |
| 1011 | target_emulate_write_same(struct se_task *task) |
| 1012 | { |
| 1013 | struct se_cmd *cmd = TASK_CMD(task); |
| 1014 | struct se_device *dev = SE_DEV(cmd); |
| 1015 | sector_t lba = cmd->t_task->t_task_lba; |
| 1016 | unsigned int range; |
| 1017 | int ret; |
| 1018 | |
| 1019 | range = (cmd->data_length / DEV_ATTRIB(dev)->block_size); |
| 1020 | |
| 1021 | printk(KERN_INFO "WRITE_SAME UNMAP: LBA: %llu Range: %u\n", |
| 1022 | (unsigned long long)lba, range); |
| 1023 | |
| 1024 | ret = dev->transport->do_discard(dev, lba, range); |
| 1025 | if (ret < 0) { |
| 1026 | printk(KERN_INFO "blkdev_issue_discard() failed for WRITE_SAME\n"); |
| 1027 | return -1; |
| 1028 | } |
| 1029 | |
| 1030 | task->task_scsi_status = GOOD; |
| 1031 | transport_complete_task(task, 1); |
| 1032 | return 0; |
| 1033 | } |
| 1034 | |
| 1035 | int |
| 1036 | transport_emulate_control_cdb(struct se_task *task) |
| 1037 | { |
| 1038 | struct se_cmd *cmd = TASK_CMD(task); |
| 1039 | struct se_device *dev = SE_DEV(cmd); |
| 1040 | unsigned short service_action; |
| 1041 | int ret = 0; |
| 1042 | |
| 1043 | switch (cmd->t_task->t_task_cdb[0]) { |
| 1044 | case INQUIRY: |
| 1045 | ret = target_emulate_inquiry(cmd); |
| 1046 | break; |
| 1047 | case READ_CAPACITY: |
| 1048 | ret = target_emulate_readcapacity(cmd); |
| 1049 | break; |
| 1050 | case MODE_SENSE: |
| 1051 | ret = target_emulate_modesense(cmd, 0); |
| 1052 | break; |
| 1053 | case MODE_SENSE_10: |
| 1054 | ret = target_emulate_modesense(cmd, 1); |
| 1055 | break; |
| 1056 | case SERVICE_ACTION_IN: |
| 1057 | switch (cmd->t_task->t_task_cdb[1] & 0x1f) { |
| 1058 | case SAI_READ_CAPACITY_16: |
| 1059 | ret = target_emulate_readcapacity_16(cmd); |
| 1060 | break; |
| 1061 | default: |
| 1062 | printk(KERN_ERR "Unsupported SA: 0x%02x\n", |
| 1063 | cmd->t_task->t_task_cdb[1] & 0x1f); |
| 1064 | return PYX_TRANSPORT_UNKNOWN_SAM_OPCODE; |
| 1065 | } |
| 1066 | break; |
| 1067 | case REQUEST_SENSE: |
| 1068 | ret = target_emulate_request_sense(cmd); |
| 1069 | break; |
| 1070 | case UNMAP: |
| 1071 | if (!dev->transport->do_discard) { |
| 1072 | printk(KERN_ERR "UNMAP emulation not supported for: %s\n", |
| 1073 | dev->transport->name); |
| 1074 | return PYX_TRANSPORT_UNKNOWN_SAM_OPCODE; |
| 1075 | } |
| 1076 | ret = target_emulate_unmap(task); |
| 1077 | break; |
| 1078 | case WRITE_SAME_16: |
| 1079 | if (!dev->transport->do_discard) { |
| 1080 | printk(KERN_ERR "WRITE_SAME_16 emulation not supported" |
| 1081 | " for: %s\n", dev->transport->name); |
| 1082 | return PYX_TRANSPORT_UNKNOWN_SAM_OPCODE; |
| 1083 | } |
| 1084 | ret = target_emulate_write_same(task); |
| 1085 | break; |
| 1086 | case VARIABLE_LENGTH_CMD: |
| 1087 | service_action = |
| 1088 | get_unaligned_be16(&cmd->t_task->t_task_cdb[8]); |
| 1089 | switch (service_action) { |
| 1090 | case WRITE_SAME_32: |
| 1091 | if (!dev->transport->do_discard) { |
| 1092 | printk(KERN_ERR "WRITE_SAME_32 SA emulation not" |
| 1093 | " supported for: %s\n", |
| 1094 | dev->transport->name); |
| 1095 | return PYX_TRANSPORT_UNKNOWN_SAM_OPCODE; |
| 1096 | } |
| 1097 | ret = target_emulate_write_same(task); |
| 1098 | break; |
| 1099 | default: |
| 1100 | printk(KERN_ERR "Unsupported VARIABLE_LENGTH_CMD SA:" |
| 1101 | " 0x%02x\n", service_action); |
| 1102 | break; |
| 1103 | } |
| 1104 | break; |
| 1105 | case SYNCHRONIZE_CACHE: |
| 1106 | case 0x91: /* SYNCHRONIZE_CACHE_16: */ |
| 1107 | if (!dev->transport->do_sync_cache) { |
| 1108 | printk(KERN_ERR |
| 1109 | "SYNCHRONIZE_CACHE emulation not supported" |
| 1110 | " for: %s\n", dev->transport->name); |
| 1111 | return PYX_TRANSPORT_UNKNOWN_SAM_OPCODE; |
| 1112 | } |
| 1113 | dev->transport->do_sync_cache(task); |
| 1114 | break; |
| 1115 | case ALLOW_MEDIUM_REMOVAL: |
| 1116 | case ERASE: |
| 1117 | case REZERO_UNIT: |
| 1118 | case SEEK_10: |
| 1119 | case SPACE: |
| 1120 | case START_STOP: |
| 1121 | case TEST_UNIT_READY: |
| 1122 | case VERIFY: |
| 1123 | case WRITE_FILEMARKS: |
| 1124 | break; |
| 1125 | default: |
| 1126 | printk(KERN_ERR "Unsupported SCSI Opcode: 0x%02x for %s\n", |
| 1127 | cmd->t_task->t_task_cdb[0], dev->transport->name); |
| 1128 | return PYX_TRANSPORT_UNKNOWN_SAM_OPCODE; |
| 1129 | } |
| 1130 | |
| 1131 | if (ret < 0) |
| 1132 | return ret; |
| 1133 | task->task_scsi_status = GOOD; |
| 1134 | transport_complete_task(task, 1); |
| 1135 | |
| 1136 | return PYX_TRANSPORT_SENT_TO_TRANSPORT; |
| 1137 | } |