Christoph Hellwig | 88455ec | 2012-05-20 11:59:13 -0400 | [diff] [blame] | 1 | /* |
| 2 | * SCSI Primary Commands (SPC) parsing and emulation. |
| 3 | * |
Nicholas Bellinger | 4c76251 | 2013-09-05 15:29:12 -0700 | [diff] [blame] | 4 | * (c) Copyright 2002-2013 Datera, Inc. |
Christoph Hellwig | 88455ec | 2012-05-20 11:59:13 -0400 | [diff] [blame] | 5 | * |
| 6 | * Nicholas A. Bellinger <nab@kernel.org> |
| 7 | * |
| 8 | * This program is free software; you can redistribute it and/or modify |
| 9 | * it under the terms of the GNU General Public License as published by |
| 10 | * the Free Software Foundation; either version 2 of the License, or |
| 11 | * (at your option) any later version. |
| 12 | * |
| 13 | * This program is distributed in the hope that it will be useful, |
| 14 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 15 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 16 | * GNU General Public License for more details. |
| 17 | * |
| 18 | * You should have received a copy of the GNU General Public License |
| 19 | * along with this program; if not, write to the Free Software |
| 20 | * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. |
| 21 | */ |
| 22 | |
| 23 | #include <linux/kernel.h> |
| 24 | #include <linux/module.h> |
| 25 | #include <asm/unaligned.h> |
| 26 | |
| 27 | #include <scsi/scsi.h> |
| 28 | #include <scsi/scsi_tcq.h> |
| 29 | |
| 30 | #include <target/target_core_base.h> |
| 31 | #include <target/target_core_backend.h> |
| 32 | #include <target/target_core_fabric.h> |
| 33 | |
| 34 | #include "target_core_internal.h" |
Nicholas Bellinger | eba2ca4 | 2012-05-30 14:09:10 -0700 | [diff] [blame] | 35 | #include "target_core_alua.h" |
Christoph Hellwig | 88455ec | 2012-05-20 11:59:13 -0400 | [diff] [blame] | 36 | #include "target_core_pr.h" |
| 37 | #include "target_core_ua.h" |
Nicholas Bellinger | 04b1b79 | 2013-08-22 12:29:59 -0700 | [diff] [blame] | 38 | #include "target_core_xcopy.h" |
Christoph Hellwig | 88455ec | 2012-05-20 11:59:13 -0400 | [diff] [blame] | 39 | |
Christoph Hellwig | 1fd032e | 2012-05-20 11:59:15 -0400 | [diff] [blame] | 40 | static void spc_fill_alua_data(struct se_port *port, unsigned char *buf) |
| 41 | { |
| 42 | struct t10_alua_tg_pt_gp *tg_pt_gp; |
| 43 | struct t10_alua_tg_pt_gp_member *tg_pt_gp_mem; |
| 44 | |
| 45 | /* |
| 46 | * Set SCCS for MAINTENANCE_IN + REPORT_TARGET_PORT_GROUPS. |
| 47 | */ |
| 48 | buf[5] = 0x80; |
| 49 | |
| 50 | /* |
Hannes Reinecke | 125d011 | 2013-11-19 09:07:46 +0100 | [diff] [blame] | 51 | * Set TPGS field for explicit and/or implicit ALUA access type |
Christoph Hellwig | 1fd032e | 2012-05-20 11:59:15 -0400 | [diff] [blame] | 52 | * and opteration. |
| 53 | * |
| 54 | * See spc4r17 section 6.4.2 Table 135 |
| 55 | */ |
| 56 | if (!port) |
| 57 | return; |
| 58 | tg_pt_gp_mem = port->sep_alua_tg_pt_gp_mem; |
| 59 | if (!tg_pt_gp_mem) |
| 60 | return; |
| 61 | |
| 62 | spin_lock(&tg_pt_gp_mem->tg_pt_gp_mem_lock); |
| 63 | tg_pt_gp = tg_pt_gp_mem->tg_pt_gp; |
| 64 | if (tg_pt_gp) |
| 65 | buf[5] |= tg_pt_gp->tg_pt_gp_alua_access_type; |
| 66 | spin_unlock(&tg_pt_gp_mem->tg_pt_gp_mem_lock); |
| 67 | } |
| 68 | |
Hannes Reinecke | 0dfa1c5 | 2012-12-17 09:53:35 +0100 | [diff] [blame] | 69 | sense_reason_t |
| 70 | spc_emulate_inquiry_std(struct se_cmd *cmd, unsigned char *buf) |
Christoph Hellwig | 1fd032e | 2012-05-20 11:59:15 -0400 | [diff] [blame] | 71 | { |
| 72 | struct se_lun *lun = cmd->se_lun; |
| 73 | struct se_device *dev = cmd->se_dev; |
| 74 | |
| 75 | /* Set RMB (removable media) for tape devices */ |
| 76 | if (dev->transport->get_device_type(dev) == TYPE_TAPE) |
| 77 | buf[1] = 0x80; |
| 78 | |
Christoph Hellwig | 48c2567 | 2012-10-10 17:37:17 -0400 | [diff] [blame] | 79 | buf[2] = 0x05; /* SPC-3 */ |
Christoph Hellwig | 1fd032e | 2012-05-20 11:59:15 -0400 | [diff] [blame] | 80 | |
| 81 | /* |
| 82 | * NORMACA and HISUP = 0, RESPONSE DATA FORMAT = 2 |
| 83 | * |
| 84 | * SPC4 says: |
| 85 | * A RESPONSE DATA FORMAT field set to 2h indicates that the |
| 86 | * standard INQUIRY data is in the format defined in this |
| 87 | * standard. Response data format values less than 2h are |
| 88 | * obsolete. Response data format values greater than 2h are |
| 89 | * reserved. |
| 90 | */ |
| 91 | buf[3] = 2; |
| 92 | |
| 93 | /* |
| 94 | * Enable SCCS and TPGS fields for Emulated ALUA |
| 95 | */ |
Christoph Hellwig | c87fbd5 | 2012-10-10 17:37:16 -0400 | [diff] [blame] | 96 | spc_fill_alua_data(lun->lun_sep, buf); |
Christoph Hellwig | 1fd032e | 2012-05-20 11:59:15 -0400 | [diff] [blame] | 97 | |
Nicholas Bellinger | d397a44 | 2013-08-22 14:17:20 -0700 | [diff] [blame] | 98 | /* |
| 99 | * Set Third-Party Copy (3PC) bit to indicate support for EXTENDED_COPY |
| 100 | */ |
| 101 | if (dev->dev_attrib.emulate_3pc) |
| 102 | buf[5] |= 0x8; |
| 103 | |
Christoph Hellwig | 1fd032e | 2012-05-20 11:59:15 -0400 | [diff] [blame] | 104 | buf[7] = 0x2; /* CmdQue=1 */ |
| 105 | |
Nicholas Bellinger | ee60bdd | 2013-07-24 16:15:08 -0700 | [diff] [blame] | 106 | memcpy(&buf[8], "LIO-ORG ", 8); |
| 107 | memset(&buf[16], 0x20, 16); |
| 108 | memcpy(&buf[16], dev->t10_wwn.model, |
| 109 | min_t(size_t, strlen(dev->t10_wwn.model), 16)); |
| 110 | memcpy(&buf[32], dev->t10_wwn.revision, |
| 111 | min_t(size_t, strlen(dev->t10_wwn.revision), 4)); |
Christoph Hellwig | 1fd032e | 2012-05-20 11:59:15 -0400 | [diff] [blame] | 112 | buf[4] = 31; /* Set additional length to 31 */ |
| 113 | |
| 114 | return 0; |
| 115 | } |
Hannes Reinecke | 0dfa1c5 | 2012-12-17 09:53:35 +0100 | [diff] [blame] | 116 | EXPORT_SYMBOL(spc_emulate_inquiry_std); |
Christoph Hellwig | 1fd032e | 2012-05-20 11:59:15 -0400 | [diff] [blame] | 117 | |
| 118 | /* unit serial number */ |
Christoph Hellwig | de103c9 | 2012-11-06 12:24:09 -0800 | [diff] [blame] | 119 | static sense_reason_t |
| 120 | spc_emulate_evpd_80(struct se_cmd *cmd, unsigned char *buf) |
Christoph Hellwig | 1fd032e | 2012-05-20 11:59:15 -0400 | [diff] [blame] | 121 | { |
| 122 | struct se_device *dev = cmd->se_dev; |
| 123 | u16 len = 0; |
| 124 | |
Christoph Hellwig | 0fd97cc | 2012-10-08 00:03:19 -0400 | [diff] [blame] | 125 | if (dev->dev_flags & DF_EMULATED_VPD_UNIT_SERIAL) { |
Christoph Hellwig | 1fd032e | 2012-05-20 11:59:15 -0400 | [diff] [blame] | 126 | u32 unit_serial_len; |
| 127 | |
Christoph Hellwig | 0fd97cc | 2012-10-08 00:03:19 -0400 | [diff] [blame] | 128 | unit_serial_len = strlen(dev->t10_wwn.unit_serial); |
Christoph Hellwig | 1fd032e | 2012-05-20 11:59:15 -0400 | [diff] [blame] | 129 | unit_serial_len++; /* For NULL Terminator */ |
| 130 | |
Christoph Hellwig | 0fd97cc | 2012-10-08 00:03:19 -0400 | [diff] [blame] | 131 | len += sprintf(&buf[4], "%s", dev->t10_wwn.unit_serial); |
Christoph Hellwig | 1fd032e | 2012-05-20 11:59:15 -0400 | [diff] [blame] | 132 | len++; /* Extra Byte for NULL Terminator */ |
| 133 | buf[3] = len; |
| 134 | } |
| 135 | return 0; |
| 136 | } |
| 137 | |
Nicholas Bellinger | 6836602 | 2013-08-20 17:02:21 -0700 | [diff] [blame] | 138 | void spc_parse_naa_6h_vendor_specific(struct se_device *dev, |
| 139 | unsigned char *buf) |
Christoph Hellwig | 1fd032e | 2012-05-20 11:59:15 -0400 | [diff] [blame] | 140 | { |
Christoph Hellwig | 0fd97cc | 2012-10-08 00:03:19 -0400 | [diff] [blame] | 141 | unsigned char *p = &dev->t10_wwn.unit_serial[0]; |
Christoph Hellwig | 1fd032e | 2012-05-20 11:59:15 -0400 | [diff] [blame] | 142 | int cnt; |
| 143 | bool next = true; |
| 144 | |
| 145 | /* |
| 146 | * Generate up to 36 bits of VENDOR SPECIFIC IDENTIFIER starting on |
| 147 | * byte 3 bit 3-0 for NAA IEEE Registered Extended DESIGNATOR field |
| 148 | * format, followed by 64 bits of VENDOR SPECIFIC IDENTIFIER EXTENSION |
| 149 | * to complete the payload. These are based from VPD=0x80 PRODUCT SERIAL |
| 150 | * NUMBER set via vpd_unit_serial in target_core_configfs.c to ensure |
| 151 | * per device uniqeness. |
| 152 | */ |
| 153 | for (cnt = 0; *p && cnt < 13; p++) { |
| 154 | int val = hex_to_bin(*p); |
| 155 | |
| 156 | if (val < 0) |
| 157 | continue; |
| 158 | |
| 159 | if (next) { |
| 160 | next = false; |
| 161 | buf[cnt++] |= val; |
| 162 | } else { |
| 163 | next = true; |
| 164 | buf[cnt] = val << 4; |
| 165 | } |
| 166 | } |
| 167 | } |
| 168 | |
| 169 | /* |
| 170 | * Device identification VPD, for a complete list of |
| 171 | * DESIGNATOR TYPEs see spc4r17 Table 459. |
| 172 | */ |
Hannes Reinecke | 0dfa1c5 | 2012-12-17 09:53:35 +0100 | [diff] [blame] | 173 | sense_reason_t |
Christoph Hellwig | de103c9 | 2012-11-06 12:24:09 -0800 | [diff] [blame] | 174 | spc_emulate_evpd_83(struct se_cmd *cmd, unsigned char *buf) |
Christoph Hellwig | 1fd032e | 2012-05-20 11:59:15 -0400 | [diff] [blame] | 175 | { |
| 176 | struct se_device *dev = cmd->se_dev; |
| 177 | struct se_lun *lun = cmd->se_lun; |
| 178 | struct se_port *port = NULL; |
| 179 | struct se_portal_group *tpg = NULL; |
| 180 | struct t10_alua_lu_gp_member *lu_gp_mem; |
| 181 | struct t10_alua_tg_pt_gp *tg_pt_gp; |
| 182 | struct t10_alua_tg_pt_gp_member *tg_pt_gp_mem; |
Christoph Hellwig | 0fd97cc | 2012-10-08 00:03:19 -0400 | [diff] [blame] | 183 | unsigned char *prod = &dev->t10_wwn.model[0]; |
Christoph Hellwig | 1fd032e | 2012-05-20 11:59:15 -0400 | [diff] [blame] | 184 | u32 prod_len; |
| 185 | u32 unit_serial_len, off = 0; |
| 186 | u16 len = 0, id_len; |
| 187 | |
| 188 | off = 4; |
| 189 | |
| 190 | /* |
| 191 | * NAA IEEE Registered Extended Assigned designator format, see |
| 192 | * spc4r17 section 7.7.3.6.5 |
| 193 | * |
| 194 | * We depend upon a target_core_mod/ConfigFS provided |
| 195 | * /sys/kernel/config/target/core/$HBA/$DEV/wwn/vpd_unit_serial |
| 196 | * value in order to return the NAA id. |
| 197 | */ |
Christoph Hellwig | 0fd97cc | 2012-10-08 00:03:19 -0400 | [diff] [blame] | 198 | if (!(dev->dev_flags & DF_EMULATED_VPD_UNIT_SERIAL)) |
Christoph Hellwig | 1fd032e | 2012-05-20 11:59:15 -0400 | [diff] [blame] | 199 | goto check_t10_vend_desc; |
| 200 | |
| 201 | /* CODE SET == Binary */ |
| 202 | buf[off++] = 0x1; |
| 203 | |
| 204 | /* Set ASSOCIATION == addressed logical unit: 0)b */ |
| 205 | buf[off] = 0x00; |
| 206 | |
| 207 | /* Identifier/Designator type == NAA identifier */ |
| 208 | buf[off++] |= 0x3; |
| 209 | off++; |
| 210 | |
| 211 | /* Identifier/Designator length */ |
| 212 | buf[off++] = 0x10; |
| 213 | |
| 214 | /* |
| 215 | * Start NAA IEEE Registered Extended Identifier/Designator |
| 216 | */ |
| 217 | buf[off++] = (0x6 << 4); |
| 218 | |
| 219 | /* |
| 220 | * Use OpenFabrics IEEE Company ID: 00 14 05 |
| 221 | */ |
| 222 | buf[off++] = 0x01; |
| 223 | buf[off++] = 0x40; |
| 224 | buf[off] = (0x5 << 4); |
| 225 | |
| 226 | /* |
| 227 | * Return ConfigFS Unit Serial Number information for |
| 228 | * VENDOR_SPECIFIC_IDENTIFIER and |
| 229 | * VENDOR_SPECIFIC_IDENTIFIER_EXTENTION |
| 230 | */ |
| 231 | spc_parse_naa_6h_vendor_specific(dev, &buf[off]); |
| 232 | |
| 233 | len = 20; |
| 234 | off = (len + 4); |
| 235 | |
| 236 | check_t10_vend_desc: |
| 237 | /* |
| 238 | * T10 Vendor Identifier Page, see spc4r17 section 7.7.3.4 |
| 239 | */ |
| 240 | id_len = 8; /* For Vendor field */ |
| 241 | prod_len = 4; /* For VPD Header */ |
| 242 | prod_len += 8; /* For Vendor field */ |
| 243 | prod_len += strlen(prod); |
| 244 | prod_len++; /* For : */ |
| 245 | |
Christoph Hellwig | 0fd97cc | 2012-10-08 00:03:19 -0400 | [diff] [blame] | 246 | if (dev->dev_flags & DF_EMULATED_VPD_UNIT_SERIAL) { |
| 247 | unit_serial_len = strlen(&dev->t10_wwn.unit_serial[0]); |
Christoph Hellwig | 1fd032e | 2012-05-20 11:59:15 -0400 | [diff] [blame] | 248 | unit_serial_len++; /* For NULL Terminator */ |
| 249 | |
| 250 | id_len += sprintf(&buf[off+12], "%s:%s", prod, |
Christoph Hellwig | 0fd97cc | 2012-10-08 00:03:19 -0400 | [diff] [blame] | 251 | &dev->t10_wwn.unit_serial[0]); |
Christoph Hellwig | 1fd032e | 2012-05-20 11:59:15 -0400 | [diff] [blame] | 252 | } |
| 253 | buf[off] = 0x2; /* ASCII */ |
| 254 | buf[off+1] = 0x1; /* T10 Vendor ID */ |
| 255 | buf[off+2] = 0x0; |
| 256 | memcpy(&buf[off+4], "LIO-ORG", 8); |
| 257 | /* Extra Byte for NULL Terminator */ |
| 258 | id_len++; |
| 259 | /* Identifier Length */ |
| 260 | buf[off+3] = id_len; |
| 261 | /* Header size for Designation descriptor */ |
| 262 | len += (id_len + 4); |
| 263 | off += (id_len + 4); |
| 264 | /* |
| 265 | * struct se_port is only set for INQUIRY VPD=1 through $FABRIC_MOD |
| 266 | */ |
| 267 | port = lun->lun_sep; |
| 268 | if (port) { |
| 269 | struct t10_alua_lu_gp *lu_gp; |
Hannes Reinecke | fbfe858 | 2013-12-17 09:18:48 +0100 | [diff] [blame^] | 270 | u32 padding, scsi_name_len, scsi_target_len; |
Christoph Hellwig | 1fd032e | 2012-05-20 11:59:15 -0400 | [diff] [blame] | 271 | u16 lu_gp_id = 0; |
| 272 | u16 tg_pt_gp_id = 0; |
| 273 | u16 tpgt; |
| 274 | |
| 275 | tpg = port->sep_tpg; |
| 276 | /* |
| 277 | * Relative target port identifer, see spc4r17 |
| 278 | * section 7.7.3.7 |
| 279 | * |
| 280 | * Get the PROTOCOL IDENTIFIER as defined by spc4r17 |
| 281 | * section 7.5.1 Table 362 |
| 282 | */ |
| 283 | buf[off] = |
| 284 | (tpg->se_tpg_tfo->get_fabric_proto_ident(tpg) << 4); |
| 285 | buf[off++] |= 0x1; /* CODE SET == Binary */ |
| 286 | buf[off] = 0x80; /* Set PIV=1 */ |
| 287 | /* Set ASSOCIATION == target port: 01b */ |
| 288 | buf[off] |= 0x10; |
| 289 | /* DESIGNATOR TYPE == Relative target port identifer */ |
| 290 | buf[off++] |= 0x4; |
| 291 | off++; /* Skip over Reserved */ |
| 292 | buf[off++] = 4; /* DESIGNATOR LENGTH */ |
| 293 | /* Skip over Obsolete field in RTPI payload |
| 294 | * in Table 472 */ |
| 295 | off += 2; |
| 296 | buf[off++] = ((port->sep_rtpi >> 8) & 0xff); |
| 297 | buf[off++] = (port->sep_rtpi & 0xff); |
| 298 | len += 8; /* Header size + Designation descriptor */ |
| 299 | /* |
| 300 | * Target port group identifier, see spc4r17 |
| 301 | * section 7.7.3.8 |
| 302 | * |
| 303 | * Get the PROTOCOL IDENTIFIER as defined by spc4r17 |
| 304 | * section 7.5.1 Table 362 |
| 305 | */ |
Christoph Hellwig | 1fd032e | 2012-05-20 11:59:15 -0400 | [diff] [blame] | 306 | tg_pt_gp_mem = port->sep_alua_tg_pt_gp_mem; |
| 307 | if (!tg_pt_gp_mem) |
| 308 | goto check_lu_gp; |
| 309 | |
| 310 | spin_lock(&tg_pt_gp_mem->tg_pt_gp_mem_lock); |
| 311 | tg_pt_gp = tg_pt_gp_mem->tg_pt_gp; |
| 312 | if (!tg_pt_gp) { |
| 313 | spin_unlock(&tg_pt_gp_mem->tg_pt_gp_mem_lock); |
| 314 | goto check_lu_gp; |
| 315 | } |
| 316 | tg_pt_gp_id = tg_pt_gp->tg_pt_gp_id; |
| 317 | spin_unlock(&tg_pt_gp_mem->tg_pt_gp_mem_lock); |
| 318 | |
| 319 | buf[off] = |
| 320 | (tpg->se_tpg_tfo->get_fabric_proto_ident(tpg) << 4); |
| 321 | buf[off++] |= 0x1; /* CODE SET == Binary */ |
| 322 | buf[off] = 0x80; /* Set PIV=1 */ |
| 323 | /* Set ASSOCIATION == target port: 01b */ |
| 324 | buf[off] |= 0x10; |
| 325 | /* DESIGNATOR TYPE == Target port group identifier */ |
| 326 | buf[off++] |= 0x5; |
| 327 | off++; /* Skip over Reserved */ |
| 328 | buf[off++] = 4; /* DESIGNATOR LENGTH */ |
| 329 | off += 2; /* Skip over Reserved Field */ |
| 330 | buf[off++] = ((tg_pt_gp_id >> 8) & 0xff); |
| 331 | buf[off++] = (tg_pt_gp_id & 0xff); |
| 332 | len += 8; /* Header size + Designation descriptor */ |
| 333 | /* |
| 334 | * Logical Unit Group identifier, see spc4r17 |
| 335 | * section 7.7.3.8 |
| 336 | */ |
| 337 | check_lu_gp: |
| 338 | lu_gp_mem = dev->dev_alua_lu_gp_mem; |
| 339 | if (!lu_gp_mem) |
| 340 | goto check_scsi_name; |
| 341 | |
| 342 | spin_lock(&lu_gp_mem->lu_gp_mem_lock); |
| 343 | lu_gp = lu_gp_mem->lu_gp; |
| 344 | if (!lu_gp) { |
| 345 | spin_unlock(&lu_gp_mem->lu_gp_mem_lock); |
| 346 | goto check_scsi_name; |
| 347 | } |
| 348 | lu_gp_id = lu_gp->lu_gp_id; |
| 349 | spin_unlock(&lu_gp_mem->lu_gp_mem_lock); |
| 350 | |
| 351 | buf[off++] |= 0x1; /* CODE SET == Binary */ |
| 352 | /* DESIGNATOR TYPE == Logical Unit Group identifier */ |
| 353 | buf[off++] |= 0x6; |
| 354 | off++; /* Skip over Reserved */ |
| 355 | buf[off++] = 4; /* DESIGNATOR LENGTH */ |
| 356 | off += 2; /* Skip over Reserved Field */ |
| 357 | buf[off++] = ((lu_gp_id >> 8) & 0xff); |
| 358 | buf[off++] = (lu_gp_id & 0xff); |
| 359 | len += 8; /* Header size + Designation descriptor */ |
| 360 | /* |
| 361 | * SCSI name string designator, see spc4r17 |
| 362 | * section 7.7.3.11 |
| 363 | * |
| 364 | * Get the PROTOCOL IDENTIFIER as defined by spc4r17 |
| 365 | * section 7.5.1 Table 362 |
| 366 | */ |
| 367 | check_scsi_name: |
Christoph Hellwig | 1fd032e | 2012-05-20 11:59:15 -0400 | [diff] [blame] | 368 | buf[off] = |
| 369 | (tpg->se_tpg_tfo->get_fabric_proto_ident(tpg) << 4); |
| 370 | buf[off++] |= 0x3; /* CODE SET == UTF-8 */ |
| 371 | buf[off] = 0x80; /* Set PIV=1 */ |
| 372 | /* Set ASSOCIATION == target port: 01b */ |
| 373 | buf[off] |= 0x10; |
| 374 | /* DESIGNATOR TYPE == SCSI name string */ |
| 375 | buf[off++] |= 0x8; |
| 376 | off += 2; /* Skip over Reserved and length */ |
| 377 | /* |
| 378 | * SCSI name string identifer containing, $FABRIC_MOD |
| 379 | * dependent information. For LIO-Target and iSCSI |
| 380 | * Target Port, this means "<iSCSI name>,t,0x<TPGT> in |
| 381 | * UTF-8 encoding. |
| 382 | */ |
| 383 | tpgt = tpg->se_tpg_tfo->tpg_get_tag(tpg); |
| 384 | scsi_name_len = sprintf(&buf[off], "%s,t,0x%04x", |
| 385 | tpg->se_tpg_tfo->tpg_get_wwn(tpg), tpgt); |
| 386 | scsi_name_len += 1 /* Include NULL terminator */; |
| 387 | /* |
| 388 | * The null-terminated, null-padded (see 4.4.2) SCSI |
| 389 | * NAME STRING field contains a UTF-8 format string. |
| 390 | * The number of bytes in the SCSI NAME STRING field |
| 391 | * (i.e., the value in the DESIGNATOR LENGTH field) |
| 392 | * shall be no larger than 256 and shall be a multiple |
| 393 | * of four. |
| 394 | */ |
Hannes Reinecke | 03ba84c | 2013-12-17 09:18:47 +0100 | [diff] [blame] | 395 | padding = ((-scsi_name_len) & 3); |
Christoph Hellwig | 1fd032e | 2012-05-20 11:59:15 -0400 | [diff] [blame] | 396 | if (padding) |
| 397 | scsi_name_len += padding; |
Hannes Reinecke | 03ba84c | 2013-12-17 09:18:47 +0100 | [diff] [blame] | 398 | if (scsi_name_len > 256) |
| 399 | scsi_name_len = 256; |
Christoph Hellwig | 1fd032e | 2012-05-20 11:59:15 -0400 | [diff] [blame] | 400 | |
| 401 | buf[off-1] = scsi_name_len; |
| 402 | off += scsi_name_len; |
| 403 | /* Header size + Designation descriptor */ |
| 404 | len += (scsi_name_len + 4); |
Hannes Reinecke | fbfe858 | 2013-12-17 09:18:48 +0100 | [diff] [blame^] | 405 | |
| 406 | /* |
| 407 | * Target device designator |
| 408 | */ |
| 409 | buf[off] = |
| 410 | (tpg->se_tpg_tfo->get_fabric_proto_ident(tpg) << 4); |
| 411 | buf[off++] |= 0x3; /* CODE SET == UTF-8 */ |
| 412 | buf[off] = 0x80; /* Set PIV=1 */ |
| 413 | /* Set ASSOCIATION == target device: 10b */ |
| 414 | buf[off] |= 0x20; |
| 415 | /* DESIGNATOR TYPE == SCSI name string */ |
| 416 | buf[off++] |= 0x8; |
| 417 | off += 2; /* Skip over Reserved and length */ |
| 418 | /* |
| 419 | * SCSI name string identifer containing, $FABRIC_MOD |
| 420 | * dependent information. For LIO-Target and iSCSI |
| 421 | * Target Port, this means "<iSCSI name>" in |
| 422 | * UTF-8 encoding. |
| 423 | */ |
| 424 | scsi_target_len = sprintf(&buf[off], "%s", |
| 425 | tpg->se_tpg_tfo->tpg_get_wwn(tpg)); |
| 426 | scsi_target_len += 1 /* Include NULL terminator */; |
| 427 | /* |
| 428 | * The null-terminated, null-padded (see 4.4.2) SCSI |
| 429 | * NAME STRING field contains a UTF-8 format string. |
| 430 | * The number of bytes in the SCSI NAME STRING field |
| 431 | * (i.e., the value in the DESIGNATOR LENGTH field) |
| 432 | * shall be no larger than 256 and shall be a multiple |
| 433 | * of four. |
| 434 | */ |
| 435 | padding = ((-scsi_target_len) & 3); |
| 436 | if (padding) |
| 437 | scsi_target_len += padding; |
| 438 | if (scsi_name_len > 256) |
| 439 | scsi_name_len = 256; |
| 440 | |
| 441 | buf[off-1] = scsi_target_len; |
| 442 | off += scsi_target_len; |
| 443 | |
| 444 | /* Header size + Designation descriptor */ |
| 445 | len += (scsi_target_len + 4); |
Christoph Hellwig | 1fd032e | 2012-05-20 11:59:15 -0400 | [diff] [blame] | 446 | } |
| 447 | buf[2] = ((len >> 8) & 0xff); |
| 448 | buf[3] = (len & 0xff); /* Page Length for VPD 0x83 */ |
| 449 | return 0; |
| 450 | } |
Hannes Reinecke | 0dfa1c5 | 2012-12-17 09:53:35 +0100 | [diff] [blame] | 451 | EXPORT_SYMBOL(spc_emulate_evpd_83); |
Christoph Hellwig | 1fd032e | 2012-05-20 11:59:15 -0400 | [diff] [blame] | 452 | |
Nicholas Bellinger | d0c8b25 | 2013-01-29 22:10:06 -0800 | [diff] [blame] | 453 | static bool |
| 454 | spc_check_dev_wce(struct se_device *dev) |
| 455 | { |
| 456 | bool wce = false; |
| 457 | |
| 458 | if (dev->transport->get_write_cache) |
| 459 | wce = dev->transport->get_write_cache(dev); |
| 460 | else if (dev->dev_attrib.emulate_write_cache > 0) |
| 461 | wce = true; |
| 462 | |
| 463 | return wce; |
| 464 | } |
| 465 | |
Christoph Hellwig | 1fd032e | 2012-05-20 11:59:15 -0400 | [diff] [blame] | 466 | /* Extended INQUIRY Data VPD Page */ |
Christoph Hellwig | de103c9 | 2012-11-06 12:24:09 -0800 | [diff] [blame] | 467 | static sense_reason_t |
| 468 | spc_emulate_evpd_86(struct se_cmd *cmd, unsigned char *buf) |
Christoph Hellwig | 1fd032e | 2012-05-20 11:59:15 -0400 | [diff] [blame] | 469 | { |
Nicholas Bellinger | d0c8b25 | 2013-01-29 22:10:06 -0800 | [diff] [blame] | 470 | struct se_device *dev = cmd->se_dev; |
| 471 | |
Christoph Hellwig | 1fd032e | 2012-05-20 11:59:15 -0400 | [diff] [blame] | 472 | buf[3] = 0x3c; |
| 473 | /* Set HEADSUP, ORDSUP, SIMPSUP */ |
| 474 | buf[5] = 0x07; |
| 475 | |
| 476 | /* If WriteCache emulation is enabled, set V_SUP */ |
Nicholas Bellinger | d0c8b25 | 2013-01-29 22:10:06 -0800 | [diff] [blame] | 477 | if (spc_check_dev_wce(dev)) |
Christoph Hellwig | 1fd032e | 2012-05-20 11:59:15 -0400 | [diff] [blame] | 478 | buf[6] = 0x01; |
| 479 | return 0; |
| 480 | } |
| 481 | |
| 482 | /* Block Limits VPD page */ |
Christoph Hellwig | de103c9 | 2012-11-06 12:24:09 -0800 | [diff] [blame] | 483 | static sense_reason_t |
| 484 | spc_emulate_evpd_b0(struct se_cmd *cmd, unsigned char *buf) |
Christoph Hellwig | 1fd032e | 2012-05-20 11:59:15 -0400 | [diff] [blame] | 485 | { |
| 486 | struct se_device *dev = cmd->se_dev; |
| 487 | u32 max_sectors; |
| 488 | int have_tp = 0; |
Andy Grover | 7f7caf6 | 2013-11-11 08:59:17 -0800 | [diff] [blame] | 489 | int opt, min; |
Christoph Hellwig | 1fd032e | 2012-05-20 11:59:15 -0400 | [diff] [blame] | 490 | |
| 491 | /* |
| 492 | * Following spc3r22 section 6.5.3 Block Limits VPD page, when |
| 493 | * emulate_tpu=1 or emulate_tpws=1 we will be expect a |
| 494 | * different page length for Thin Provisioning. |
| 495 | */ |
Christoph Hellwig | 0fd97cc | 2012-10-08 00:03:19 -0400 | [diff] [blame] | 496 | if (dev->dev_attrib.emulate_tpu || dev->dev_attrib.emulate_tpws) |
Christoph Hellwig | 1fd032e | 2012-05-20 11:59:15 -0400 | [diff] [blame] | 497 | have_tp = 1; |
| 498 | |
| 499 | buf[0] = dev->transport->get_device_type(dev); |
| 500 | buf[3] = have_tp ? 0x3c : 0x10; |
| 501 | |
| 502 | /* Set WSNZ to 1 */ |
| 503 | buf[4] = 0x01; |
Nicholas Bellinger | 0123a9e | 2013-08-20 14:24:09 -0700 | [diff] [blame] | 504 | /* |
| 505 | * Set MAXIMUM COMPARE AND WRITE LENGTH |
| 506 | */ |
| 507 | if (dev->dev_attrib.emulate_caw) |
| 508 | buf[5] = 0x01; |
Christoph Hellwig | 1fd032e | 2012-05-20 11:59:15 -0400 | [diff] [blame] | 509 | |
| 510 | /* |
| 511 | * Set OPTIMAL TRANSFER LENGTH GRANULARITY |
| 512 | */ |
Andy Grover | 7f7caf6 | 2013-11-11 08:59:17 -0800 | [diff] [blame] | 513 | if (dev->transport->get_io_min && (min = dev->transport->get_io_min(dev))) |
| 514 | put_unaligned_be16(min / dev->dev_attrib.block_size, &buf[6]); |
| 515 | else |
| 516 | put_unaligned_be16(1, &buf[6]); |
Christoph Hellwig | 1fd032e | 2012-05-20 11:59:15 -0400 | [diff] [blame] | 517 | |
| 518 | /* |
| 519 | * Set MAXIMUM TRANSFER LENGTH |
| 520 | */ |
Christoph Hellwig | 0fd97cc | 2012-10-08 00:03:19 -0400 | [diff] [blame] | 521 | max_sectors = min(dev->dev_attrib.fabric_max_sectors, |
| 522 | dev->dev_attrib.hw_max_sectors); |
Christoph Hellwig | 1fd032e | 2012-05-20 11:59:15 -0400 | [diff] [blame] | 523 | put_unaligned_be32(max_sectors, &buf[8]); |
| 524 | |
| 525 | /* |
| 526 | * Set OPTIMAL TRANSFER LENGTH |
| 527 | */ |
Andy Grover | 7f7caf6 | 2013-11-11 08:59:17 -0800 | [diff] [blame] | 528 | if (dev->transport->get_io_opt && (opt = dev->transport->get_io_opt(dev))) |
| 529 | put_unaligned_be32(opt / dev->dev_attrib.block_size, &buf[12]); |
| 530 | else |
| 531 | put_unaligned_be32(dev->dev_attrib.optimal_sectors, &buf[12]); |
Christoph Hellwig | 1fd032e | 2012-05-20 11:59:15 -0400 | [diff] [blame] | 532 | |
| 533 | /* |
| 534 | * Exit now if we don't support TP. |
| 535 | */ |
| 536 | if (!have_tp) |
Nicholas Bellinger | 773cbaf | 2012-11-15 11:02:49 -0800 | [diff] [blame] | 537 | goto max_write_same; |
Christoph Hellwig | 1fd032e | 2012-05-20 11:59:15 -0400 | [diff] [blame] | 538 | |
| 539 | /* |
| 540 | * Set MAXIMUM UNMAP LBA COUNT |
| 541 | */ |
Christoph Hellwig | 0fd97cc | 2012-10-08 00:03:19 -0400 | [diff] [blame] | 542 | put_unaligned_be32(dev->dev_attrib.max_unmap_lba_count, &buf[20]); |
Christoph Hellwig | 1fd032e | 2012-05-20 11:59:15 -0400 | [diff] [blame] | 543 | |
| 544 | /* |
| 545 | * Set MAXIMUM UNMAP BLOCK DESCRIPTOR COUNT |
| 546 | */ |
Christoph Hellwig | 0fd97cc | 2012-10-08 00:03:19 -0400 | [diff] [blame] | 547 | put_unaligned_be32(dev->dev_attrib.max_unmap_block_desc_count, |
Christoph Hellwig | 1fd032e | 2012-05-20 11:59:15 -0400 | [diff] [blame] | 548 | &buf[24]); |
| 549 | |
| 550 | /* |
| 551 | * Set OPTIMAL UNMAP GRANULARITY |
| 552 | */ |
Christoph Hellwig | 0fd97cc | 2012-10-08 00:03:19 -0400 | [diff] [blame] | 553 | put_unaligned_be32(dev->dev_attrib.unmap_granularity, &buf[28]); |
Christoph Hellwig | 1fd032e | 2012-05-20 11:59:15 -0400 | [diff] [blame] | 554 | |
| 555 | /* |
| 556 | * UNMAP GRANULARITY ALIGNMENT |
| 557 | */ |
Christoph Hellwig | 0fd97cc | 2012-10-08 00:03:19 -0400 | [diff] [blame] | 558 | put_unaligned_be32(dev->dev_attrib.unmap_granularity_alignment, |
Christoph Hellwig | 1fd032e | 2012-05-20 11:59:15 -0400 | [diff] [blame] | 559 | &buf[32]); |
Christoph Hellwig | 0fd97cc | 2012-10-08 00:03:19 -0400 | [diff] [blame] | 560 | if (dev->dev_attrib.unmap_granularity_alignment != 0) |
Christoph Hellwig | 1fd032e | 2012-05-20 11:59:15 -0400 | [diff] [blame] | 561 | buf[32] |= 0x80; /* Set the UGAVALID bit */ |
| 562 | |
Nicholas Bellinger | 773cbaf | 2012-11-15 11:02:49 -0800 | [diff] [blame] | 563 | /* |
| 564 | * MAXIMUM WRITE SAME LENGTH |
| 565 | */ |
| 566 | max_write_same: |
| 567 | put_unaligned_be64(dev->dev_attrib.max_write_same_len, &buf[36]); |
| 568 | |
Christoph Hellwig | 1fd032e | 2012-05-20 11:59:15 -0400 | [diff] [blame] | 569 | return 0; |
| 570 | } |
| 571 | |
| 572 | /* Block Device Characteristics VPD page */ |
Christoph Hellwig | de103c9 | 2012-11-06 12:24:09 -0800 | [diff] [blame] | 573 | static sense_reason_t |
| 574 | spc_emulate_evpd_b1(struct se_cmd *cmd, unsigned char *buf) |
Christoph Hellwig | 1fd032e | 2012-05-20 11:59:15 -0400 | [diff] [blame] | 575 | { |
| 576 | struct se_device *dev = cmd->se_dev; |
| 577 | |
| 578 | buf[0] = dev->transport->get_device_type(dev); |
| 579 | buf[3] = 0x3c; |
Christoph Hellwig | 0fd97cc | 2012-10-08 00:03:19 -0400 | [diff] [blame] | 580 | buf[5] = dev->dev_attrib.is_nonrot ? 1 : 0; |
Christoph Hellwig | 1fd032e | 2012-05-20 11:59:15 -0400 | [diff] [blame] | 581 | |
| 582 | return 0; |
| 583 | } |
| 584 | |
| 585 | /* Thin Provisioning VPD */ |
Christoph Hellwig | de103c9 | 2012-11-06 12:24:09 -0800 | [diff] [blame] | 586 | static sense_reason_t |
| 587 | spc_emulate_evpd_b2(struct se_cmd *cmd, unsigned char *buf) |
Christoph Hellwig | 1fd032e | 2012-05-20 11:59:15 -0400 | [diff] [blame] | 588 | { |
| 589 | struct se_device *dev = cmd->se_dev; |
| 590 | |
| 591 | /* |
| 592 | * From spc3r22 section 6.5.4 Thin Provisioning VPD page: |
| 593 | * |
| 594 | * The PAGE LENGTH field is defined in SPC-4. If the DP bit is set to |
| 595 | * zero, then the page length shall be set to 0004h. If the DP bit |
| 596 | * is set to one, then the page length shall be set to the value |
| 597 | * defined in table 162. |
| 598 | */ |
| 599 | buf[0] = dev->transport->get_device_type(dev); |
| 600 | |
| 601 | /* |
| 602 | * Set Hardcoded length mentioned above for DP=0 |
| 603 | */ |
| 604 | put_unaligned_be16(0x0004, &buf[2]); |
| 605 | |
| 606 | /* |
| 607 | * The THRESHOLD EXPONENT field indicates the threshold set size in |
| 608 | * LBAs as a power of 2 (i.e., the threshold set size is equal to |
| 609 | * 2(threshold exponent)). |
| 610 | * |
| 611 | * Note that this is currently set to 0x00 as mkp says it will be |
| 612 | * changing again. We can enable this once it has settled in T10 |
| 613 | * and is actually used by Linux/SCSI ML code. |
| 614 | */ |
| 615 | buf[4] = 0x00; |
| 616 | |
| 617 | /* |
| 618 | * A TPU bit set to one indicates that the device server supports |
| 619 | * the UNMAP command (see 5.25). A TPU bit set to zero indicates |
| 620 | * that the device server does not support the UNMAP command. |
| 621 | */ |
Christoph Hellwig | 0fd97cc | 2012-10-08 00:03:19 -0400 | [diff] [blame] | 622 | if (dev->dev_attrib.emulate_tpu != 0) |
Christoph Hellwig | 1fd032e | 2012-05-20 11:59:15 -0400 | [diff] [blame] | 623 | buf[5] = 0x80; |
| 624 | |
| 625 | /* |
| 626 | * A TPWS bit set to one indicates that the device server supports |
| 627 | * the use of the WRITE SAME (16) command (see 5.42) to unmap LBAs. |
| 628 | * A TPWS bit set to zero indicates that the device server does not |
| 629 | * support the use of the WRITE SAME (16) command to unmap LBAs. |
| 630 | */ |
Christoph Hellwig | 0fd97cc | 2012-10-08 00:03:19 -0400 | [diff] [blame] | 631 | if (dev->dev_attrib.emulate_tpws != 0) |
Christoph Hellwig | 1fd032e | 2012-05-20 11:59:15 -0400 | [diff] [blame] | 632 | buf[5] |= 0x40; |
| 633 | |
| 634 | return 0; |
| 635 | } |
| 636 | |
Christoph Hellwig | de103c9 | 2012-11-06 12:24:09 -0800 | [diff] [blame] | 637 | static sense_reason_t |
| 638 | spc_emulate_evpd_00(struct se_cmd *cmd, unsigned char *buf); |
Christoph Hellwig | 1fd032e | 2012-05-20 11:59:15 -0400 | [diff] [blame] | 639 | |
| 640 | static struct { |
| 641 | uint8_t page; |
Christoph Hellwig | de103c9 | 2012-11-06 12:24:09 -0800 | [diff] [blame] | 642 | sense_reason_t (*emulate)(struct se_cmd *, unsigned char *); |
Christoph Hellwig | 1fd032e | 2012-05-20 11:59:15 -0400 | [diff] [blame] | 643 | } evpd_handlers[] = { |
| 644 | { .page = 0x00, .emulate = spc_emulate_evpd_00 }, |
| 645 | { .page = 0x80, .emulate = spc_emulate_evpd_80 }, |
| 646 | { .page = 0x83, .emulate = spc_emulate_evpd_83 }, |
| 647 | { .page = 0x86, .emulate = spc_emulate_evpd_86 }, |
| 648 | { .page = 0xb0, .emulate = spc_emulate_evpd_b0 }, |
| 649 | { .page = 0xb1, .emulate = spc_emulate_evpd_b1 }, |
| 650 | { .page = 0xb2, .emulate = spc_emulate_evpd_b2 }, |
| 651 | }; |
| 652 | |
| 653 | /* supported vital product data pages */ |
Christoph Hellwig | de103c9 | 2012-11-06 12:24:09 -0800 | [diff] [blame] | 654 | static sense_reason_t |
| 655 | spc_emulate_evpd_00(struct se_cmd *cmd, unsigned char *buf) |
Christoph Hellwig | 1fd032e | 2012-05-20 11:59:15 -0400 | [diff] [blame] | 656 | { |
| 657 | int p; |
| 658 | |
| 659 | /* |
| 660 | * Only report the INQUIRY EVPD=1 pages after a valid NAA |
| 661 | * Registered Extended LUN WWN has been set via ConfigFS |
| 662 | * during device creation/restart. |
| 663 | */ |
Christoph Hellwig | 0fd97cc | 2012-10-08 00:03:19 -0400 | [diff] [blame] | 664 | if (cmd->se_dev->dev_flags & DF_EMULATED_VPD_UNIT_SERIAL) { |
Christoph Hellwig | 1fd032e | 2012-05-20 11:59:15 -0400 | [diff] [blame] | 665 | buf[3] = ARRAY_SIZE(evpd_handlers); |
| 666 | for (p = 0; p < ARRAY_SIZE(evpd_handlers); ++p) |
| 667 | buf[p + 4] = evpd_handlers[p].page; |
| 668 | } |
| 669 | |
| 670 | return 0; |
| 671 | } |
| 672 | |
Christoph Hellwig | de103c9 | 2012-11-06 12:24:09 -0800 | [diff] [blame] | 673 | static sense_reason_t |
| 674 | spc_emulate_inquiry(struct se_cmd *cmd) |
Christoph Hellwig | 1fd032e | 2012-05-20 11:59:15 -0400 | [diff] [blame] | 675 | { |
| 676 | struct se_device *dev = cmd->se_dev; |
| 677 | struct se_portal_group *tpg = cmd->se_lun->lun_sep->sep_tpg; |
Paolo Bonzini | ffe7b0e | 2012-09-07 17:30:38 +0200 | [diff] [blame] | 678 | unsigned char *rbuf; |
Christoph Hellwig | 1fd032e | 2012-05-20 11:59:15 -0400 | [diff] [blame] | 679 | unsigned char *cdb = cmd->t_task_cdb; |
Paolo Bonzini | ffe7b0e | 2012-09-07 17:30:38 +0200 | [diff] [blame] | 680 | unsigned char buf[SE_INQUIRY_BUF]; |
Christoph Hellwig | de103c9 | 2012-11-06 12:24:09 -0800 | [diff] [blame] | 681 | sense_reason_t ret; |
| 682 | int p; |
Christoph Hellwig | 1fd032e | 2012-05-20 11:59:15 -0400 | [diff] [blame] | 683 | |
Nicholas Bellinger | dea5f09 | 2012-10-31 22:04:26 -0700 | [diff] [blame] | 684 | memset(buf, 0, SE_INQUIRY_BUF); |
| 685 | |
Christoph Hellwig | 1fd032e | 2012-05-20 11:59:15 -0400 | [diff] [blame] | 686 | if (dev == tpg->tpg_virt_lun0.lun_se_dev) |
| 687 | buf[0] = 0x3f; /* Not connected */ |
| 688 | else |
| 689 | buf[0] = dev->transport->get_device_type(dev); |
| 690 | |
| 691 | if (!(cdb[1] & 0x1)) { |
| 692 | if (cdb[2]) { |
| 693 | pr_err("INQUIRY with EVPD==0 but PAGE CODE=%02x\n", |
| 694 | cdb[2]); |
Christoph Hellwig | de103c9 | 2012-11-06 12:24:09 -0800 | [diff] [blame] | 695 | ret = TCM_INVALID_CDB_FIELD; |
Christoph Hellwig | 1fd032e | 2012-05-20 11:59:15 -0400 | [diff] [blame] | 696 | goto out; |
| 697 | } |
| 698 | |
| 699 | ret = spc_emulate_inquiry_std(cmd, buf); |
| 700 | goto out; |
| 701 | } |
| 702 | |
| 703 | for (p = 0; p < ARRAY_SIZE(evpd_handlers); ++p) { |
| 704 | if (cdb[2] == evpd_handlers[p].page) { |
| 705 | buf[1] = cdb[2]; |
| 706 | ret = evpd_handlers[p].emulate(cmd, buf); |
| 707 | goto out; |
| 708 | } |
| 709 | } |
| 710 | |
| 711 | pr_err("Unknown VPD Code: 0x%02x\n", cdb[2]); |
Christoph Hellwig | de103c9 | 2012-11-06 12:24:09 -0800 | [diff] [blame] | 712 | ret = TCM_INVALID_CDB_FIELD; |
Christoph Hellwig | 1fd032e | 2012-05-20 11:59:15 -0400 | [diff] [blame] | 713 | |
| 714 | out: |
Paolo Bonzini | ffe7b0e | 2012-09-07 17:30:38 +0200 | [diff] [blame] | 715 | rbuf = transport_kmap_data_sg(cmd); |
Nicholas Bellinger | 49df9fc | 2013-01-29 13:33:05 -0800 | [diff] [blame] | 716 | if (rbuf) { |
| 717 | memcpy(rbuf, buf, min_t(u32, sizeof(buf), cmd->data_length)); |
| 718 | transport_kunmap_data_sg(cmd); |
| 719 | } |
Christoph Hellwig | 1fd032e | 2012-05-20 11:59:15 -0400 | [diff] [blame] | 720 | |
| 721 | if (!ret) |
| 722 | target_complete_cmd(cmd, GOOD); |
| 723 | return ret; |
| 724 | } |
| 725 | |
Roland Dreier | d4b2b86 | 2012-10-31 09:16:48 -0700 | [diff] [blame] | 726 | static int spc_modesense_rwrecovery(struct se_device *dev, u8 pc, u8 *p) |
Christoph Hellwig | 1fd032e | 2012-05-20 11:59:15 -0400 | [diff] [blame] | 727 | { |
| 728 | p[0] = 0x01; |
| 729 | p[1] = 0x0a; |
| 730 | |
Roland Dreier | d4b2b86 | 2012-10-31 09:16:48 -0700 | [diff] [blame] | 731 | /* No changeable values for now */ |
| 732 | if (pc == 1) |
| 733 | goto out; |
| 734 | |
| 735 | out: |
Christoph Hellwig | 1fd032e | 2012-05-20 11:59:15 -0400 | [diff] [blame] | 736 | return 12; |
| 737 | } |
| 738 | |
Roland Dreier | d4b2b86 | 2012-10-31 09:16:48 -0700 | [diff] [blame] | 739 | static int spc_modesense_control(struct se_device *dev, u8 pc, u8 *p) |
Christoph Hellwig | 1fd032e | 2012-05-20 11:59:15 -0400 | [diff] [blame] | 740 | { |
| 741 | p[0] = 0x0a; |
| 742 | p[1] = 0x0a; |
Roland Dreier | d4b2b86 | 2012-10-31 09:16:48 -0700 | [diff] [blame] | 743 | |
| 744 | /* No changeable values for now */ |
| 745 | if (pc == 1) |
| 746 | goto out; |
| 747 | |
Christoph Hellwig | 1fd032e | 2012-05-20 11:59:15 -0400 | [diff] [blame] | 748 | p[2] = 2; |
| 749 | /* |
| 750 | * From spc4r23, 7.4.7 Control mode page |
| 751 | * |
| 752 | * The QUEUE ALGORITHM MODIFIER field (see table 368) specifies |
| 753 | * restrictions on the algorithm used for reordering commands |
| 754 | * having the SIMPLE task attribute (see SAM-4). |
| 755 | * |
| 756 | * Table 368 -- QUEUE ALGORITHM MODIFIER field |
| 757 | * Code Description |
| 758 | * 0h Restricted reordering |
| 759 | * 1h Unrestricted reordering allowed |
| 760 | * 2h to 7h Reserved |
| 761 | * 8h to Fh Vendor specific |
| 762 | * |
| 763 | * A value of zero in the QUEUE ALGORITHM MODIFIER field specifies that |
| 764 | * the device server shall order the processing sequence of commands |
| 765 | * having the SIMPLE task attribute such that data integrity is maintained |
| 766 | * for that I_T nexus (i.e., if the transmission of new SCSI transport protocol |
| 767 | * requests is halted at any time, the final value of all data observable |
| 768 | * on the medium shall be the same as if all the commands had been processed |
| 769 | * with the ORDERED task attribute). |
| 770 | * |
| 771 | * A value of one in the QUEUE ALGORITHM MODIFIER field specifies that the |
| 772 | * device server may reorder the processing sequence of commands having the |
| 773 | * SIMPLE task attribute in any manner. Any data integrity exposures related to |
| 774 | * command sequence order shall be explicitly handled by the application client |
| 775 | * through the selection of appropriate ommands and task attributes. |
| 776 | */ |
Christoph Hellwig | 0fd97cc | 2012-10-08 00:03:19 -0400 | [diff] [blame] | 777 | p[3] = (dev->dev_attrib.emulate_rest_reord == 1) ? 0x00 : 0x10; |
Christoph Hellwig | 1fd032e | 2012-05-20 11:59:15 -0400 | [diff] [blame] | 778 | /* |
| 779 | * From spc4r17, section 7.4.6 Control mode Page |
| 780 | * |
| 781 | * Unit Attention interlocks control (UN_INTLCK_CTRL) to code 00b |
| 782 | * |
| 783 | * 00b: The logical unit shall clear any unit attention condition |
| 784 | * reported in the same I_T_L_Q nexus transaction as a CHECK CONDITION |
| 785 | * status and shall not establish a unit attention condition when a com- |
| 786 | * mand is completed with BUSY, TASK SET FULL, or RESERVATION CONFLICT |
| 787 | * status. |
| 788 | * |
| 789 | * 10b: The logical unit shall not 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 |
| 792 | * a command is completed with BUSY, TASK SET FULL, or RESERVATION |
| 793 | * CONFLICT status. |
| 794 | * |
| 795 | * 11b a 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 establish a unit attention condition for the |
| 798 | * initiator port associated with the I_T nexus on which the BUSY, |
| 799 | * TASK SET FULL, or RESERVATION CONFLICT status is being returned. |
| 800 | * Depending on the status, the additional sense code shall be set to |
| 801 | * PREVIOUS BUSY STATUS, PREVIOUS TASK SET FULL STATUS, or PREVIOUS |
| 802 | * RESERVATION CONFLICT STATUS. Until it is cleared by a REQUEST SENSE |
| 803 | * command, a unit attention condition shall be established only once |
| 804 | * for a BUSY, TASK SET FULL, or RESERVATION CONFLICT status regardless |
| 805 | * to the number of commands completed with one of those status codes. |
| 806 | */ |
Christoph Hellwig | 0fd97cc | 2012-10-08 00:03:19 -0400 | [diff] [blame] | 807 | p[4] = (dev->dev_attrib.emulate_ua_intlck_ctrl == 2) ? 0x30 : |
| 808 | (dev->dev_attrib.emulate_ua_intlck_ctrl == 1) ? 0x20 : 0x00; |
Christoph Hellwig | 1fd032e | 2012-05-20 11:59:15 -0400 | [diff] [blame] | 809 | /* |
| 810 | * From spc4r17, section 7.4.6 Control mode Page |
| 811 | * |
| 812 | * Task Aborted Status (TAS) bit set to zero. |
| 813 | * |
| 814 | * A task aborted status (TAS) bit set to zero specifies that aborted |
| 815 | * tasks shall be terminated by the device server without any response |
| 816 | * to the application client. A TAS bit set to one specifies that tasks |
| 817 | * aborted by the actions of an I_T nexus other than the I_T nexus on |
| 818 | * which the command was received shall be completed with TASK ABORTED |
| 819 | * status (see SAM-4). |
| 820 | */ |
Christoph Hellwig | 0fd97cc | 2012-10-08 00:03:19 -0400 | [diff] [blame] | 821 | p[5] = (dev->dev_attrib.emulate_tas) ? 0x40 : 0x00; |
Christoph Hellwig | 1fd032e | 2012-05-20 11:59:15 -0400 | [diff] [blame] | 822 | p[8] = 0xff; |
| 823 | p[9] = 0xff; |
| 824 | p[11] = 30; |
| 825 | |
Roland Dreier | d4b2b86 | 2012-10-31 09:16:48 -0700 | [diff] [blame] | 826 | out: |
Christoph Hellwig | 1fd032e | 2012-05-20 11:59:15 -0400 | [diff] [blame] | 827 | return 12; |
| 828 | } |
| 829 | |
Roland Dreier | d4b2b86 | 2012-10-31 09:16:48 -0700 | [diff] [blame] | 830 | static int spc_modesense_caching(struct se_device *dev, u8 pc, u8 *p) |
Christoph Hellwig | 1fd032e | 2012-05-20 11:59:15 -0400 | [diff] [blame] | 831 | { |
| 832 | p[0] = 0x08; |
| 833 | p[1] = 0x12; |
Roland Dreier | d4b2b86 | 2012-10-31 09:16:48 -0700 | [diff] [blame] | 834 | |
| 835 | /* No changeable values for now */ |
| 836 | if (pc == 1) |
| 837 | goto out; |
| 838 | |
Nicholas Bellinger | d0c8b25 | 2013-01-29 22:10:06 -0800 | [diff] [blame] | 839 | if (spc_check_dev_wce(dev)) |
Christoph Hellwig | 1fd032e | 2012-05-20 11:59:15 -0400 | [diff] [blame] | 840 | p[2] = 0x04; /* Write Cache Enable */ |
| 841 | p[12] = 0x20; /* Disabled Read Ahead */ |
| 842 | |
Roland Dreier | d4b2b86 | 2012-10-31 09:16:48 -0700 | [diff] [blame] | 843 | out: |
Christoph Hellwig | 1fd032e | 2012-05-20 11:59:15 -0400 | [diff] [blame] | 844 | return 20; |
| 845 | } |
| 846 | |
Roland Dreier | 0f6d64c | 2012-10-31 09:16:49 -0700 | [diff] [blame] | 847 | static int spc_modesense_informational_exceptions(struct se_device *dev, u8 pc, unsigned char *p) |
| 848 | { |
| 849 | p[0] = 0x1c; |
| 850 | p[1] = 0x0a; |
| 851 | |
| 852 | /* No changeable values for now */ |
| 853 | if (pc == 1) |
| 854 | goto out; |
| 855 | |
| 856 | out: |
| 857 | return 12; |
| 858 | } |
| 859 | |
Roland Dreier | d4b2b86 | 2012-10-31 09:16:48 -0700 | [diff] [blame] | 860 | static struct { |
| 861 | uint8_t page; |
| 862 | uint8_t subpage; |
| 863 | int (*emulate)(struct se_device *, u8, unsigned char *); |
| 864 | } modesense_handlers[] = { |
| 865 | { .page = 0x01, .subpage = 0x00, .emulate = spc_modesense_rwrecovery }, |
| 866 | { .page = 0x08, .subpage = 0x00, .emulate = spc_modesense_caching }, |
| 867 | { .page = 0x0a, .subpage = 0x00, .emulate = spc_modesense_control }, |
Roland Dreier | 0f6d64c | 2012-10-31 09:16:49 -0700 | [diff] [blame] | 868 | { .page = 0x1c, .subpage = 0x00, .emulate = spc_modesense_informational_exceptions }, |
Roland Dreier | d4b2b86 | 2012-10-31 09:16:48 -0700 | [diff] [blame] | 869 | }; |
| 870 | |
Christoph Hellwig | 1fd032e | 2012-05-20 11:59:15 -0400 | [diff] [blame] | 871 | static void spc_modesense_write_protect(unsigned char *buf, int type) |
| 872 | { |
| 873 | /* |
| 874 | * I believe that the WP bit (bit 7) in the mode header is the same for |
| 875 | * all device types.. |
| 876 | */ |
| 877 | switch (type) { |
| 878 | case TYPE_DISK: |
| 879 | case TYPE_TAPE: |
| 880 | default: |
| 881 | buf[0] |= 0x80; /* WP bit */ |
| 882 | break; |
| 883 | } |
| 884 | } |
| 885 | |
| 886 | static void spc_modesense_dpofua(unsigned char *buf, int type) |
| 887 | { |
| 888 | switch (type) { |
| 889 | case TYPE_DISK: |
| 890 | buf[0] |= 0x10; /* DPOFUA bit */ |
| 891 | break; |
| 892 | default: |
| 893 | break; |
| 894 | } |
| 895 | } |
| 896 | |
Roland Dreier | d4b2b86 | 2012-10-31 09:16:48 -0700 | [diff] [blame] | 897 | static int spc_modesense_blockdesc(unsigned char *buf, u64 blocks, u32 block_size) |
| 898 | { |
| 899 | *buf++ = 8; |
| 900 | put_unaligned_be32(min(blocks, 0xffffffffull), buf); |
| 901 | buf += 4; |
| 902 | put_unaligned_be32(block_size, buf); |
| 903 | return 9; |
| 904 | } |
| 905 | |
| 906 | static int spc_modesense_long_blockdesc(unsigned char *buf, u64 blocks, u32 block_size) |
| 907 | { |
| 908 | if (blocks <= 0xffffffff) |
| 909 | return spc_modesense_blockdesc(buf + 3, blocks, block_size) + 3; |
| 910 | |
| 911 | *buf++ = 1; /* LONGLBA */ |
| 912 | buf += 2; |
| 913 | *buf++ = 16; |
| 914 | put_unaligned_be64(blocks, buf); |
| 915 | buf += 12; |
| 916 | put_unaligned_be32(block_size, buf); |
| 917 | |
| 918 | return 17; |
| 919 | } |
| 920 | |
Christoph Hellwig | de103c9 | 2012-11-06 12:24:09 -0800 | [diff] [blame] | 921 | static sense_reason_t spc_emulate_modesense(struct se_cmd *cmd) |
Christoph Hellwig | 1fd032e | 2012-05-20 11:59:15 -0400 | [diff] [blame] | 922 | { |
| 923 | struct se_device *dev = cmd->se_dev; |
| 924 | char *cdb = cmd->t_task_cdb; |
Nicholas Bellinger | cab9609 | 2013-01-29 14:10:01 -0800 | [diff] [blame] | 925 | unsigned char buf[SE_MODE_PAGE_BUF], *rbuf; |
Christoph Hellwig | 1fd032e | 2012-05-20 11:59:15 -0400 | [diff] [blame] | 926 | int type = dev->transport->get_device_type(dev); |
| 927 | int ten = (cmd->t_task_cdb[0] == MODE_SENSE_10); |
Roland Dreier | d4b2b86 | 2012-10-31 09:16:48 -0700 | [diff] [blame] | 928 | bool dbd = !!(cdb[1] & 0x08); |
| 929 | bool llba = ten ? !!(cdb[1] & 0x10) : false; |
| 930 | u8 pc = cdb[2] >> 6; |
| 931 | u8 page = cdb[2] & 0x3f; |
| 932 | u8 subpage = cdb[3]; |
Christoph Hellwig | 1fd032e | 2012-05-20 11:59:15 -0400 | [diff] [blame] | 933 | int length = 0; |
Roland Dreier | d4b2b86 | 2012-10-31 09:16:48 -0700 | [diff] [blame] | 934 | int ret; |
| 935 | int i; |
Christoph Hellwig | 1fd032e | 2012-05-20 11:59:15 -0400 | [diff] [blame] | 936 | |
Nicholas Bellinger | cab9609 | 2013-01-29 14:10:01 -0800 | [diff] [blame] | 937 | memset(buf, 0, SE_MODE_PAGE_BUF); |
| 938 | |
Nicholas Bellinger | fecae40 | 2012-11-01 18:43:03 -0700 | [diff] [blame] | 939 | /* |
| 940 | * Skip over MODE DATA LENGTH + MEDIUM TYPE fields to byte 3 for |
| 941 | * MODE_SENSE_10 and byte 2 for MODE_SENSE (6). |
| 942 | */ |
| 943 | length = ten ? 3 : 2; |
Roland Dreier | d4b2b86 | 2012-10-31 09:16:48 -0700 | [diff] [blame] | 944 | |
| 945 | /* DEVICE-SPECIFIC PARAMETER */ |
| 946 | if ((cmd->se_lun->lun_access & TRANSPORT_LUNFLAGS_READ_ONLY) || |
| 947 | (cmd->se_deve && |
| 948 | (cmd->se_deve->lun_flags & TRANSPORT_LUNFLAGS_READ_ONLY))) |
| 949 | spc_modesense_write_protect(&buf[length], type); |
| 950 | |
Nicholas Bellinger | d0c8b25 | 2013-01-29 22:10:06 -0800 | [diff] [blame] | 951 | if ((spc_check_dev_wce(dev)) && |
Roland Dreier | d4b2b86 | 2012-10-31 09:16:48 -0700 | [diff] [blame] | 952 | (dev->dev_attrib.emulate_fua_write > 0)) |
| 953 | spc_modesense_dpofua(&buf[length], type); |
| 954 | |
| 955 | ++length; |
| 956 | |
| 957 | /* BLOCK DESCRIPTOR */ |
| 958 | |
| 959 | /* |
| 960 | * For now we only include a block descriptor for disk (SBC) |
| 961 | * devices; other command sets use a slightly different format. |
| 962 | */ |
| 963 | if (!dbd && type == TYPE_DISK) { |
| 964 | u64 blocks = dev->transport->get_blocks(dev); |
| 965 | u32 block_size = dev->dev_attrib.block_size; |
| 966 | |
| 967 | if (ten) { |
| 968 | if (llba) { |
| 969 | length += spc_modesense_long_blockdesc(&buf[length], |
| 970 | blocks, block_size); |
| 971 | } else { |
| 972 | length += 3; |
| 973 | length += spc_modesense_blockdesc(&buf[length], |
| 974 | blocks, block_size); |
| 975 | } |
| 976 | } else { |
| 977 | length += spc_modesense_blockdesc(&buf[length], blocks, |
| 978 | block_size); |
| 979 | } |
| 980 | } else { |
| 981 | if (ten) |
| 982 | length += 4; |
| 983 | else |
| 984 | length += 1; |
Paolo Bonzini | 7a3f369 | 2012-09-07 17:30:39 +0200 | [diff] [blame] | 985 | } |
Christoph Hellwig | 1fd032e | 2012-05-20 11:59:15 -0400 | [diff] [blame] | 986 | |
Roland Dreier | d4b2b86 | 2012-10-31 09:16:48 -0700 | [diff] [blame] | 987 | if (page == 0x3f) { |
| 988 | if (subpage != 0x00 && subpage != 0xff) { |
Christoph Hellwig | de103c9 | 2012-11-06 12:24:09 -0800 | [diff] [blame] | 989 | pr_warn("MODE_SENSE: Invalid subpage code: 0x%02x\n", subpage); |
Christoph Hellwig | de103c9 | 2012-11-06 12:24:09 -0800 | [diff] [blame] | 990 | return TCM_INVALID_CDB_FIELD; |
Roland Dreier | d4b2b86 | 2012-10-31 09:16:48 -0700 | [diff] [blame] | 991 | } |
| 992 | |
| 993 | for (i = 0; i < ARRAY_SIZE(modesense_handlers); ++i) { |
| 994 | /* |
| 995 | * Tricky way to say all subpage 00h for |
| 996 | * subpage==0, all subpages for subpage==0xff |
| 997 | * (and we just checked above that those are |
| 998 | * the only two possibilities). |
| 999 | */ |
| 1000 | if ((modesense_handlers[i].subpage & ~subpage) == 0) { |
| 1001 | ret = modesense_handlers[i].emulate(dev, pc, &buf[length]); |
| 1002 | if (!ten && length + ret >= 255) |
| 1003 | break; |
| 1004 | length += ret; |
| 1005 | } |
| 1006 | } |
| 1007 | |
| 1008 | goto set_length; |
| 1009 | } |
| 1010 | |
| 1011 | for (i = 0; i < ARRAY_SIZE(modesense_handlers); ++i) |
| 1012 | if (modesense_handlers[i].page == page && |
| 1013 | modesense_handlers[i].subpage == subpage) { |
| 1014 | length += modesense_handlers[i].emulate(dev, pc, &buf[length]); |
| 1015 | goto set_length; |
| 1016 | } |
| 1017 | |
| 1018 | /* |
| 1019 | * We don't intend to implement: |
| 1020 | * - obsolete page 03h "format parameters" (checked by Solaris) |
| 1021 | */ |
| 1022 | if (page != 0x03) |
| 1023 | pr_err("MODE SENSE: unimplemented page/subpage: 0x%02x/0x%02x\n", |
| 1024 | page, subpage); |
| 1025 | |
Christoph Hellwig | de103c9 | 2012-11-06 12:24:09 -0800 | [diff] [blame] | 1026 | return TCM_UNKNOWN_MODE_PAGE; |
Roland Dreier | d4b2b86 | 2012-10-31 09:16:48 -0700 | [diff] [blame] | 1027 | |
| 1028 | set_length: |
| 1029 | if (ten) |
| 1030 | put_unaligned_be16(length - 2, buf); |
| 1031 | else |
| 1032 | buf[0] = length - 1; |
| 1033 | |
Nicholas Bellinger | cab9609 | 2013-01-29 14:10:01 -0800 | [diff] [blame] | 1034 | rbuf = transport_kmap_data_sg(cmd); |
| 1035 | if (rbuf) { |
| 1036 | memcpy(rbuf, buf, min_t(u32, SE_MODE_PAGE_BUF, cmd->data_length)); |
| 1037 | transport_kunmap_data_sg(cmd); |
Roland Dreier | d4b2b86 | 2012-10-31 09:16:48 -0700 | [diff] [blame] | 1038 | } |
| 1039 | |
Christoph Hellwig | 1fd032e | 2012-05-20 11:59:15 -0400 | [diff] [blame] | 1040 | target_complete_cmd(cmd, GOOD); |
| 1041 | return 0; |
| 1042 | } |
| 1043 | |
Christoph Hellwig | de103c9 | 2012-11-06 12:24:09 -0800 | [diff] [blame] | 1044 | static sense_reason_t spc_emulate_modeselect(struct se_cmd *cmd) |
Roland Dreier | 3a3c5e4 | 2012-10-31 09:16:50 -0700 | [diff] [blame] | 1045 | { |
| 1046 | struct se_device *dev = cmd->se_dev; |
| 1047 | char *cdb = cmd->t_task_cdb; |
| 1048 | bool ten = cdb[0] == MODE_SELECT_10; |
| 1049 | int off = ten ? 8 : 4; |
| 1050 | bool pf = !!(cdb[1] & 0x10); |
| 1051 | u8 page, subpage; |
| 1052 | unsigned char *buf; |
| 1053 | unsigned char tbuf[SE_MODE_PAGE_BUF]; |
| 1054 | int length; |
| 1055 | int ret = 0; |
| 1056 | int i; |
| 1057 | |
Roland Dreier | 71f41fe | 2013-02-08 15:18:40 -0800 | [diff] [blame] | 1058 | if (!cmd->data_length) { |
| 1059 | target_complete_cmd(cmd, GOOD); |
| 1060 | return 0; |
| 1061 | } |
| 1062 | |
| 1063 | if (cmd->data_length < off + 2) |
| 1064 | return TCM_PARAMETER_LIST_LENGTH_ERROR; |
| 1065 | |
Roland Dreier | 3a3c5e4 | 2012-10-31 09:16:50 -0700 | [diff] [blame] | 1066 | buf = transport_kmap_data_sg(cmd); |
Christoph Hellwig | de103c9 | 2012-11-06 12:24:09 -0800 | [diff] [blame] | 1067 | if (!buf) |
| 1068 | return TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; |
Roland Dreier | 3a3c5e4 | 2012-10-31 09:16:50 -0700 | [diff] [blame] | 1069 | |
| 1070 | if (!pf) { |
Christoph Hellwig | de103c9 | 2012-11-06 12:24:09 -0800 | [diff] [blame] | 1071 | ret = TCM_INVALID_CDB_FIELD; |
Roland Dreier | 3a3c5e4 | 2012-10-31 09:16:50 -0700 | [diff] [blame] | 1072 | goto out; |
| 1073 | } |
| 1074 | |
| 1075 | page = buf[off] & 0x3f; |
| 1076 | subpage = buf[off] & 0x40 ? buf[off + 1] : 0; |
| 1077 | |
| 1078 | for (i = 0; i < ARRAY_SIZE(modesense_handlers); ++i) |
| 1079 | if (modesense_handlers[i].page == page && |
| 1080 | modesense_handlers[i].subpage == subpage) { |
| 1081 | memset(tbuf, 0, SE_MODE_PAGE_BUF); |
| 1082 | length = modesense_handlers[i].emulate(dev, 0, tbuf); |
| 1083 | goto check_contents; |
| 1084 | } |
| 1085 | |
Christoph Hellwig | de103c9 | 2012-11-06 12:24:09 -0800 | [diff] [blame] | 1086 | ret = TCM_UNKNOWN_MODE_PAGE; |
Roland Dreier | 3a3c5e4 | 2012-10-31 09:16:50 -0700 | [diff] [blame] | 1087 | goto out; |
| 1088 | |
| 1089 | check_contents: |
Roland Dreier | 71f41fe | 2013-02-08 15:18:40 -0800 | [diff] [blame] | 1090 | if (cmd->data_length < off + length) { |
| 1091 | ret = TCM_PARAMETER_LIST_LENGTH_ERROR; |
| 1092 | goto out; |
| 1093 | } |
| 1094 | |
Christoph Hellwig | de103c9 | 2012-11-06 12:24:09 -0800 | [diff] [blame] | 1095 | if (memcmp(buf + off, tbuf, length)) |
| 1096 | ret = TCM_INVALID_PARAMETER_LIST; |
Roland Dreier | 3a3c5e4 | 2012-10-31 09:16:50 -0700 | [diff] [blame] | 1097 | |
| 1098 | out: |
| 1099 | transport_kunmap_data_sg(cmd); |
| 1100 | |
| 1101 | if (!ret) |
| 1102 | target_complete_cmd(cmd, GOOD); |
| 1103 | return ret; |
| 1104 | } |
| 1105 | |
Christoph Hellwig | de103c9 | 2012-11-06 12:24:09 -0800 | [diff] [blame] | 1106 | static sense_reason_t spc_emulate_request_sense(struct se_cmd *cmd) |
Christoph Hellwig | 1fd032e | 2012-05-20 11:59:15 -0400 | [diff] [blame] | 1107 | { |
| 1108 | unsigned char *cdb = cmd->t_task_cdb; |
Paolo Bonzini | 32a8811 | 2012-09-07 17:30:36 +0200 | [diff] [blame] | 1109 | unsigned char *rbuf; |
Christoph Hellwig | 1fd032e | 2012-05-20 11:59:15 -0400 | [diff] [blame] | 1110 | u8 ua_asc = 0, ua_ascq = 0; |
Paolo Bonzini | 32a8811 | 2012-09-07 17:30:36 +0200 | [diff] [blame] | 1111 | unsigned char buf[SE_SENSE_BUF]; |
| 1112 | |
| 1113 | memset(buf, 0, SE_SENSE_BUF); |
Christoph Hellwig | 1fd032e | 2012-05-20 11:59:15 -0400 | [diff] [blame] | 1114 | |
| 1115 | if (cdb[1] & 0x01) { |
| 1116 | pr_err("REQUEST_SENSE description emulation not" |
| 1117 | " supported\n"); |
Christoph Hellwig | de103c9 | 2012-11-06 12:24:09 -0800 | [diff] [blame] | 1118 | return TCM_INVALID_CDB_FIELD; |
Christoph Hellwig | 1fd032e | 2012-05-20 11:59:15 -0400 | [diff] [blame] | 1119 | } |
| 1120 | |
Paolo Bonzini | 32a8811 | 2012-09-07 17:30:36 +0200 | [diff] [blame] | 1121 | rbuf = transport_kmap_data_sg(cmd); |
Christoph Hellwig | de103c9 | 2012-11-06 12:24:09 -0800 | [diff] [blame] | 1122 | if (!rbuf) |
| 1123 | return TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; |
| 1124 | |
| 1125 | if (!core_scsi3_ua_clear_for_request_sense(cmd, &ua_asc, &ua_ascq)) { |
Christoph Hellwig | 1fd032e | 2012-05-20 11:59:15 -0400 | [diff] [blame] | 1126 | /* |
| 1127 | * CURRENT ERROR, UNIT ATTENTION |
| 1128 | */ |
| 1129 | buf[0] = 0x70; |
| 1130 | buf[SPC_SENSE_KEY_OFFSET] = UNIT_ATTENTION; |
| 1131 | |
Christoph Hellwig | 1fd032e | 2012-05-20 11:59:15 -0400 | [diff] [blame] | 1132 | /* |
| 1133 | * The Additional Sense Code (ASC) from the UNIT ATTENTION |
| 1134 | */ |
| 1135 | buf[SPC_ASC_KEY_OFFSET] = ua_asc; |
| 1136 | buf[SPC_ASCQ_KEY_OFFSET] = ua_ascq; |
| 1137 | buf[7] = 0x0A; |
| 1138 | } else { |
| 1139 | /* |
| 1140 | * CURRENT ERROR, NO SENSE |
| 1141 | */ |
| 1142 | buf[0] = 0x70; |
| 1143 | buf[SPC_SENSE_KEY_OFFSET] = NO_SENSE; |
| 1144 | |
Christoph Hellwig | 1fd032e | 2012-05-20 11:59:15 -0400 | [diff] [blame] | 1145 | /* |
| 1146 | * NO ADDITIONAL SENSE INFORMATION |
| 1147 | */ |
| 1148 | buf[SPC_ASC_KEY_OFFSET] = 0x00; |
| 1149 | buf[7] = 0x0A; |
| 1150 | } |
| 1151 | |
Christoph Hellwig | de103c9 | 2012-11-06 12:24:09 -0800 | [diff] [blame] | 1152 | memcpy(rbuf, buf, min_t(u32, sizeof(buf), cmd->data_length)); |
| 1153 | transport_kunmap_data_sg(cmd); |
Paolo Bonzini | 32a8811 | 2012-09-07 17:30:36 +0200 | [diff] [blame] | 1154 | |
Christoph Hellwig | 1fd032e | 2012-05-20 11:59:15 -0400 | [diff] [blame] | 1155 | target_complete_cmd(cmd, GOOD); |
| 1156 | return 0; |
| 1157 | } |
| 1158 | |
Christoph Hellwig | de103c9 | 2012-11-06 12:24:09 -0800 | [diff] [blame] | 1159 | sense_reason_t spc_emulate_report_luns(struct se_cmd *cmd) |
Christoph Hellwig | d1b1f80 | 2012-10-07 10:55:51 -0400 | [diff] [blame] | 1160 | { |
| 1161 | struct se_dev_entry *deve; |
| 1162 | struct se_session *sess = cmd->se_sess; |
| 1163 | unsigned char *buf; |
| 1164 | u32 lun_count = 0, offset = 8, i; |
| 1165 | |
| 1166 | if (cmd->data_length < 16) { |
| 1167 | pr_warn("REPORT LUNS allocation length %u too small\n", |
| 1168 | cmd->data_length); |
Christoph Hellwig | de103c9 | 2012-11-06 12:24:09 -0800 | [diff] [blame] | 1169 | return TCM_INVALID_CDB_FIELD; |
Christoph Hellwig | d1b1f80 | 2012-10-07 10:55:51 -0400 | [diff] [blame] | 1170 | } |
| 1171 | |
| 1172 | buf = transport_kmap_data_sg(cmd); |
| 1173 | if (!buf) |
Christoph Hellwig | de103c9 | 2012-11-06 12:24:09 -0800 | [diff] [blame] | 1174 | return TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; |
Christoph Hellwig | d1b1f80 | 2012-10-07 10:55:51 -0400 | [diff] [blame] | 1175 | |
| 1176 | /* |
| 1177 | * If no struct se_session pointer is present, this struct se_cmd is |
| 1178 | * coming via a target_core_mod PASSTHROUGH op, and not through |
| 1179 | * a $FABRIC_MOD. In that case, report LUN=0 only. |
| 1180 | */ |
| 1181 | if (!sess) { |
| 1182 | int_to_scsilun(0, (struct scsi_lun *)&buf[offset]); |
| 1183 | lun_count = 1; |
| 1184 | goto done; |
| 1185 | } |
| 1186 | |
| 1187 | spin_lock_irq(&sess->se_node_acl->device_list_lock); |
| 1188 | for (i = 0; i < TRANSPORT_MAX_LUNS_PER_TPG; i++) { |
| 1189 | deve = sess->se_node_acl->device_list[i]; |
| 1190 | if (!(deve->lun_flags & TRANSPORT_LUNFLAGS_INITIATOR_ACCESS)) |
| 1191 | continue; |
| 1192 | /* |
| 1193 | * We determine the correct LUN LIST LENGTH even once we |
| 1194 | * have reached the initial allocation length. |
| 1195 | * See SPC2-R20 7.19. |
| 1196 | */ |
| 1197 | lun_count++; |
| 1198 | if ((offset + 8) > cmd->data_length) |
| 1199 | continue; |
| 1200 | |
| 1201 | int_to_scsilun(deve->mapped_lun, (struct scsi_lun *)&buf[offset]); |
| 1202 | offset += 8; |
| 1203 | } |
| 1204 | spin_unlock_irq(&sess->se_node_acl->device_list_lock); |
| 1205 | |
| 1206 | /* |
| 1207 | * See SPC3 r07, page 159. |
| 1208 | */ |
| 1209 | done: |
| 1210 | lun_count *= 8; |
| 1211 | buf[0] = ((lun_count >> 24) & 0xff); |
| 1212 | buf[1] = ((lun_count >> 16) & 0xff); |
| 1213 | buf[2] = ((lun_count >> 8) & 0xff); |
| 1214 | buf[3] = (lun_count & 0xff); |
| 1215 | transport_kunmap_data_sg(cmd); |
| 1216 | |
| 1217 | target_complete_cmd(cmd, GOOD); |
| 1218 | return 0; |
| 1219 | } |
Christoph Hellwig | 8de530a | 2012-10-07 10:55:52 -0400 | [diff] [blame] | 1220 | EXPORT_SYMBOL(spc_emulate_report_luns); |
Christoph Hellwig | d1b1f80 | 2012-10-07 10:55:51 -0400 | [diff] [blame] | 1221 | |
Christoph Hellwig | de103c9 | 2012-11-06 12:24:09 -0800 | [diff] [blame] | 1222 | static sense_reason_t |
| 1223 | spc_emulate_testunitready(struct se_cmd *cmd) |
Christoph Hellwig | 1fd032e | 2012-05-20 11:59:15 -0400 | [diff] [blame] | 1224 | { |
| 1225 | target_complete_cmd(cmd, GOOD); |
| 1226 | return 0; |
| 1227 | } |
| 1228 | |
Christoph Hellwig | de103c9 | 2012-11-06 12:24:09 -0800 | [diff] [blame] | 1229 | sense_reason_t |
| 1230 | spc_parse_cdb(struct se_cmd *cmd, unsigned int *size) |
Christoph Hellwig | 88455ec | 2012-05-20 11:59:13 -0400 | [diff] [blame] | 1231 | { |
Nicholas Bellinger | eba2ca4 | 2012-05-30 14:09:10 -0700 | [diff] [blame] | 1232 | struct se_device *dev = cmd->se_dev; |
Christoph Hellwig | 88455ec | 2012-05-20 11:59:13 -0400 | [diff] [blame] | 1233 | unsigned char *cdb = cmd->t_task_cdb; |
| 1234 | |
| 1235 | switch (cdb[0]) { |
| 1236 | case MODE_SELECT: |
| 1237 | *size = cdb[4]; |
Roland Dreier | 3a3c5e4 | 2012-10-31 09:16:50 -0700 | [diff] [blame] | 1238 | cmd->execute_cmd = spc_emulate_modeselect; |
Christoph Hellwig | 88455ec | 2012-05-20 11:59:13 -0400 | [diff] [blame] | 1239 | break; |
| 1240 | case MODE_SELECT_10: |
| 1241 | *size = (cdb[7] << 8) + cdb[8]; |
Roland Dreier | 3a3c5e4 | 2012-10-31 09:16:50 -0700 | [diff] [blame] | 1242 | cmd->execute_cmd = spc_emulate_modeselect; |
Christoph Hellwig | 88455ec | 2012-05-20 11:59:13 -0400 | [diff] [blame] | 1243 | break; |
| 1244 | case MODE_SENSE: |
| 1245 | *size = cdb[4]; |
Christoph Hellwig | 1fd032e | 2012-05-20 11:59:15 -0400 | [diff] [blame] | 1246 | cmd->execute_cmd = spc_emulate_modesense; |
Christoph Hellwig | 88455ec | 2012-05-20 11:59:13 -0400 | [diff] [blame] | 1247 | break; |
| 1248 | case MODE_SENSE_10: |
| 1249 | *size = (cdb[7] << 8) + cdb[8]; |
Christoph Hellwig | 1fd032e | 2012-05-20 11:59:15 -0400 | [diff] [blame] | 1250 | cmd->execute_cmd = spc_emulate_modesense; |
Christoph Hellwig | 88455ec | 2012-05-20 11:59:13 -0400 | [diff] [blame] | 1251 | break; |
| 1252 | case LOG_SELECT: |
| 1253 | case LOG_SENSE: |
| 1254 | *size = (cdb[7] << 8) + cdb[8]; |
| 1255 | break; |
| 1256 | case PERSISTENT_RESERVE_IN: |
Christoph Hellwig | 88455ec | 2012-05-20 11:59:13 -0400 | [diff] [blame] | 1257 | *size = (cdb[7] << 8) + cdb[8]; |
Christoph Hellwig | d977f43 | 2012-10-10 17:37:15 -0400 | [diff] [blame] | 1258 | cmd->execute_cmd = target_scsi3_emulate_pr_in; |
Christoph Hellwig | 88455ec | 2012-05-20 11:59:13 -0400 | [diff] [blame] | 1259 | break; |
| 1260 | case PERSISTENT_RESERVE_OUT: |
Christoph Hellwig | 88455ec | 2012-05-20 11:59:13 -0400 | [diff] [blame] | 1261 | *size = (cdb[7] << 8) + cdb[8]; |
Christoph Hellwig | d977f43 | 2012-10-10 17:37:15 -0400 | [diff] [blame] | 1262 | cmd->execute_cmd = target_scsi3_emulate_pr_out; |
Christoph Hellwig | 88455ec | 2012-05-20 11:59:13 -0400 | [diff] [blame] | 1263 | break; |
| 1264 | case RELEASE: |
| 1265 | case RELEASE_10: |
| 1266 | if (cdb[0] == RELEASE_10) |
| 1267 | *size = (cdb[7] << 8) | cdb[8]; |
| 1268 | else |
| 1269 | *size = cmd->data_length; |
| 1270 | |
Christoph Hellwig | d977f43 | 2012-10-10 17:37:15 -0400 | [diff] [blame] | 1271 | cmd->execute_cmd = target_scsi2_reservation_release; |
Christoph Hellwig | 88455ec | 2012-05-20 11:59:13 -0400 | [diff] [blame] | 1272 | break; |
| 1273 | case RESERVE: |
| 1274 | case RESERVE_10: |
| 1275 | /* |
| 1276 | * The SPC-2 RESERVE does not contain a size in the SCSI CDB. |
| 1277 | * Assume the passthrough or $FABRIC_MOD will tell us about it. |
| 1278 | */ |
| 1279 | if (cdb[0] == RESERVE_10) |
| 1280 | *size = (cdb[7] << 8) | cdb[8]; |
| 1281 | else |
| 1282 | *size = cmd->data_length; |
| 1283 | |
Christoph Hellwig | d977f43 | 2012-10-10 17:37:15 -0400 | [diff] [blame] | 1284 | cmd->execute_cmd = target_scsi2_reservation_reserve; |
Christoph Hellwig | 88455ec | 2012-05-20 11:59:13 -0400 | [diff] [blame] | 1285 | break; |
| 1286 | case REQUEST_SENSE: |
| 1287 | *size = cdb[4]; |
Christoph Hellwig | 1fd032e | 2012-05-20 11:59:15 -0400 | [diff] [blame] | 1288 | cmd->execute_cmd = spc_emulate_request_sense; |
Christoph Hellwig | 88455ec | 2012-05-20 11:59:13 -0400 | [diff] [blame] | 1289 | break; |
| 1290 | case INQUIRY: |
| 1291 | *size = (cdb[3] << 8) + cdb[4]; |
| 1292 | |
| 1293 | /* |
Hannes Reinecke | 125d011 | 2013-11-19 09:07:46 +0100 | [diff] [blame] | 1294 | * Do implicit HEAD_OF_QUEUE processing for INQUIRY. |
Christoph Hellwig | 88455ec | 2012-05-20 11:59:13 -0400 | [diff] [blame] | 1295 | * See spc4r17 section 5.3 |
| 1296 | */ |
Christoph Hellwig | 019c4ca | 2012-10-10 17:37:14 -0400 | [diff] [blame] | 1297 | cmd->sam_task_attr = MSG_HEAD_TAG; |
Christoph Hellwig | 1fd032e | 2012-05-20 11:59:15 -0400 | [diff] [blame] | 1298 | cmd->execute_cmd = spc_emulate_inquiry; |
Christoph Hellwig | 88455ec | 2012-05-20 11:59:13 -0400 | [diff] [blame] | 1299 | break; |
| 1300 | case SECURITY_PROTOCOL_IN: |
| 1301 | case SECURITY_PROTOCOL_OUT: |
| 1302 | *size = (cdb[6] << 24) | (cdb[7] << 16) | (cdb[8] << 8) | cdb[9]; |
| 1303 | break; |
| 1304 | case EXTENDED_COPY: |
Nicholas Bellinger | 04b1b79 | 2013-08-22 12:29:59 -0700 | [diff] [blame] | 1305 | *size = get_unaligned_be32(&cdb[10]); |
| 1306 | cmd->execute_cmd = target_do_xcopy; |
| 1307 | break; |
Christoph Hellwig | 88455ec | 2012-05-20 11:59:13 -0400 | [diff] [blame] | 1308 | case RECEIVE_COPY_RESULTS: |
Nicholas Bellinger | 04b1b79 | 2013-08-22 12:29:59 -0700 | [diff] [blame] | 1309 | *size = get_unaligned_be32(&cdb[10]); |
| 1310 | cmd->execute_cmd = target_do_receive_copy_results; |
| 1311 | break; |
| 1312 | case READ_ATTRIBUTE: |
Christoph Hellwig | 88455ec | 2012-05-20 11:59:13 -0400 | [diff] [blame] | 1313 | case WRITE_ATTRIBUTE: |
| 1314 | *size = (cdb[10] << 24) | (cdb[11] << 16) | |
| 1315 | (cdb[12] << 8) | cdb[13]; |
| 1316 | break; |
| 1317 | case RECEIVE_DIAGNOSTIC: |
| 1318 | case SEND_DIAGNOSTIC: |
| 1319 | *size = (cdb[3] << 8) | cdb[4]; |
| 1320 | break; |
| 1321 | case WRITE_BUFFER: |
| 1322 | *size = (cdb[6] << 16) + (cdb[7] << 8) + cdb[8]; |
| 1323 | break; |
| 1324 | case REPORT_LUNS: |
Christoph Hellwig | d1b1f80 | 2012-10-07 10:55:51 -0400 | [diff] [blame] | 1325 | cmd->execute_cmd = spc_emulate_report_luns; |
Christoph Hellwig | 88455ec | 2012-05-20 11:59:13 -0400 | [diff] [blame] | 1326 | *size = (cdb[6] << 24) | (cdb[7] << 16) | (cdb[8] << 8) | cdb[9]; |
| 1327 | /* |
Hannes Reinecke | 125d011 | 2013-11-19 09:07:46 +0100 | [diff] [blame] | 1328 | * Do implicit HEAD_OF_QUEUE processing for REPORT_LUNS |
Christoph Hellwig | 88455ec | 2012-05-20 11:59:13 -0400 | [diff] [blame] | 1329 | * See spc4r17 section 5.3 |
| 1330 | */ |
Christoph Hellwig | 019c4ca | 2012-10-10 17:37:14 -0400 | [diff] [blame] | 1331 | cmd->sam_task_attr = MSG_HEAD_TAG; |
Christoph Hellwig | 88455ec | 2012-05-20 11:59:13 -0400 | [diff] [blame] | 1332 | break; |
| 1333 | case TEST_UNIT_READY: |
Christoph Hellwig | 1fd032e | 2012-05-20 11:59:15 -0400 | [diff] [blame] | 1334 | cmd->execute_cmd = spc_emulate_testunitready; |
Christoph Hellwig | d6e0175 | 2012-05-20 11:59:14 -0400 | [diff] [blame] | 1335 | *size = 0; |
Christoph Hellwig | 88455ec | 2012-05-20 11:59:13 -0400 | [diff] [blame] | 1336 | break; |
Nicholas Bellinger | eba2ca4 | 2012-05-30 14:09:10 -0700 | [diff] [blame] | 1337 | case MAINTENANCE_IN: |
| 1338 | if (dev->transport->get_device_type(dev) != TYPE_ROM) { |
| 1339 | /* |
| 1340 | * MAINTENANCE_IN from SCC-2 |
| 1341 | * Check for emulated MI_REPORT_TARGET_PGS |
| 1342 | */ |
Christoph Hellwig | c87fbd5 | 2012-10-10 17:37:16 -0400 | [diff] [blame] | 1343 | if ((cdb[1] & 0x1f) == MI_REPORT_TARGET_PGS) { |
Nicholas Bellinger | eba2ca4 | 2012-05-30 14:09:10 -0700 | [diff] [blame] | 1344 | cmd->execute_cmd = |
| 1345 | target_emulate_report_target_port_groups; |
| 1346 | } |
| 1347 | *size = get_unaligned_be32(&cdb[6]); |
| 1348 | } else { |
| 1349 | /* |
| 1350 | * GPCMD_SEND_KEY from multi media commands |
| 1351 | */ |
| 1352 | *size = get_unaligned_be16(&cdb[8]); |
| 1353 | } |
| 1354 | break; |
| 1355 | case MAINTENANCE_OUT: |
| 1356 | if (dev->transport->get_device_type(dev) != TYPE_ROM) { |
| 1357 | /* |
| 1358 | * MAINTENANCE_OUT from SCC-2 |
| 1359 | * Check for emulated MO_SET_TARGET_PGS. |
| 1360 | */ |
Christoph Hellwig | c87fbd5 | 2012-10-10 17:37:16 -0400 | [diff] [blame] | 1361 | if (cdb[1] == MO_SET_TARGET_PGS) { |
Nicholas Bellinger | eba2ca4 | 2012-05-30 14:09:10 -0700 | [diff] [blame] | 1362 | cmd->execute_cmd = |
| 1363 | target_emulate_set_target_port_groups; |
| 1364 | } |
| 1365 | *size = get_unaligned_be32(&cdb[6]); |
| 1366 | } else { |
| 1367 | /* |
| 1368 | * GPCMD_SEND_KEY from multi media commands |
| 1369 | */ |
| 1370 | *size = get_unaligned_be16(&cdb[8]); |
| 1371 | } |
| 1372 | break; |
Christoph Hellwig | 88455ec | 2012-05-20 11:59:13 -0400 | [diff] [blame] | 1373 | default: |
| 1374 | pr_warn("TARGET_CORE[%s]: Unsupported SCSI Opcode" |
| 1375 | " 0x%02x, sending CHECK_CONDITION.\n", |
| 1376 | cmd->se_tfo->get_fabric_name(), cdb[0]); |
Christoph Hellwig | de103c9 | 2012-11-06 12:24:09 -0800 | [diff] [blame] | 1377 | return TCM_UNSUPPORTED_SCSI_OPCODE; |
Christoph Hellwig | 88455ec | 2012-05-20 11:59:13 -0400 | [diff] [blame] | 1378 | } |
| 1379 | |
| 1380 | return 0; |
| 1381 | } |
| 1382 | EXPORT_SYMBOL(spc_parse_cdb); |