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 | |
Andy Shevchenko | 11650b85 | 2011-07-18 22:26:40 -0700 | [diff] [blame] | 26 | #include <linux/kernel.h> |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 27 | #include <asm/unaligned.h> |
| 28 | #include <scsi/scsi.h> |
| 29 | |
| 30 | #include <target/target_core_base.h> |
| 31 | #include <target/target_core_transport.h> |
| 32 | #include <target/target_core_fabric_ops.h> |
| 33 | #include "target_core_ua.h" |
| 34 | |
| 35 | static void |
| 36 | target_fill_alua_data(struct se_port *port, unsigned char *buf) |
| 37 | { |
| 38 | struct t10_alua_tg_pt_gp *tg_pt_gp; |
| 39 | struct t10_alua_tg_pt_gp_member *tg_pt_gp_mem; |
| 40 | |
| 41 | /* |
| 42 | * Set SCCS for MAINTENANCE_IN + REPORT_TARGET_PORT_GROUPS. |
| 43 | */ |
| 44 | buf[5] = 0x80; |
| 45 | |
| 46 | /* |
| 47 | * Set TPGS field for explict and/or implict ALUA access type |
| 48 | * and opteration. |
| 49 | * |
| 50 | * See spc4r17 section 6.4.2 Table 135 |
| 51 | */ |
| 52 | if (!port) |
| 53 | return; |
| 54 | tg_pt_gp_mem = port->sep_alua_tg_pt_gp_mem; |
| 55 | if (!tg_pt_gp_mem) |
| 56 | return; |
| 57 | |
| 58 | spin_lock(&tg_pt_gp_mem->tg_pt_gp_mem_lock); |
| 59 | tg_pt_gp = tg_pt_gp_mem->tg_pt_gp; |
| 60 | if (tg_pt_gp) |
| 61 | buf[5] |= tg_pt_gp->tg_pt_gp_alua_access_type; |
| 62 | spin_unlock(&tg_pt_gp_mem->tg_pt_gp_mem_lock); |
| 63 | } |
| 64 | |
| 65 | static int |
| 66 | target_emulate_inquiry_std(struct se_cmd *cmd) |
| 67 | { |
Andy Grover | e3d6f90 | 2011-07-19 08:55:10 +0000 | [diff] [blame] | 68 | struct se_lun *lun = cmd->se_lun; |
Andy Grover | 5951146 | 2011-07-19 10:26:37 +0000 | [diff] [blame] | 69 | struct se_device *dev = cmd->se_dev; |
Nicholas Bellinger | 052605c | 2011-07-26 17:48:43 -0700 | [diff] [blame^] | 70 | struct se_portal_group *tpg = lun->lun_sep->sep_tpg; |
Andy Grover | 05d1c7c | 2011-07-20 19:13:28 +0000 | [diff] [blame] | 71 | unsigned char *buf; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 72 | |
| 73 | /* |
| 74 | * Make sure we at least have 6 bytes of INQUIRY response |
| 75 | * payload going back for EVPD=0 |
| 76 | */ |
| 77 | if (cmd->data_length < 6) { |
Andy Grover | 6708bb2 | 2011-06-08 10:36:43 -0700 | [diff] [blame] | 78 | pr_err("SCSI Inquiry payload length: %u" |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 79 | " too small for EVPD=0\n", cmd->data_length); |
Andy Grover | e3d6f90 | 2011-07-19 08:55:10 +0000 | [diff] [blame] | 80 | return -EINVAL; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 81 | } |
| 82 | |
Andy Grover | 05d1c7c | 2011-07-20 19:13:28 +0000 | [diff] [blame] | 83 | buf = transport_kmap_first_data_page(cmd); |
| 84 | |
Nicholas Bellinger | 052605c | 2011-07-26 17:48:43 -0700 | [diff] [blame^] | 85 | if (dev == tpg->tpg_virt_lun0.lun_se_dev) { |
| 86 | buf[0] = 0x3f; /* Not connected */ |
| 87 | } else { |
| 88 | buf[0] = dev->transport->get_device_type(dev); |
| 89 | if (buf[0] == TYPE_TAPE) |
| 90 | buf[1] = 0x80; |
| 91 | } |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 92 | buf[2] = dev->transport->get_device_rev(dev); |
| 93 | |
| 94 | /* |
| 95 | * Enable SCCS and TPGS fields for Emulated ALUA |
| 96 | */ |
Andy Grover | e3d6f90 | 2011-07-19 08:55:10 +0000 | [diff] [blame] | 97 | if (dev->se_sub_dev->t10_alua.alua_type == SPC3_ALUA_EMULATED) |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 98 | target_fill_alua_data(lun->lun_sep, buf); |
| 99 | |
| 100 | if (cmd->data_length < 8) { |
| 101 | buf[4] = 1; /* Set additional length to 1 */ |
Andy Grover | 05d1c7c | 2011-07-20 19:13:28 +0000 | [diff] [blame] | 102 | goto out; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 103 | } |
| 104 | |
| 105 | buf[7] = 0x32; /* Sync=1 and CmdQue=1 */ |
| 106 | |
| 107 | /* |
| 108 | * Do not include vendor, product, reversion info in INQUIRY |
| 109 | * response payload for cdbs with a small allocation length. |
| 110 | */ |
| 111 | if (cmd->data_length < 36) { |
| 112 | buf[4] = 3; /* Set additional length to 3 */ |
Andy Grover | 05d1c7c | 2011-07-20 19:13:28 +0000 | [diff] [blame] | 113 | goto out; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 114 | } |
| 115 | |
| 116 | snprintf((unsigned char *)&buf[8], 8, "LIO-ORG"); |
| 117 | snprintf((unsigned char *)&buf[16], 16, "%s", |
Andy Grover | e3d6f90 | 2011-07-19 08:55:10 +0000 | [diff] [blame] | 118 | &dev->se_sub_dev->t10_wwn.model[0]); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 119 | snprintf((unsigned char *)&buf[32], 4, "%s", |
Andy Grover | e3d6f90 | 2011-07-19 08:55:10 +0000 | [diff] [blame] | 120 | &dev->se_sub_dev->t10_wwn.revision[0]); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 121 | buf[4] = 31; /* Set additional length to 31 */ |
Andy Grover | 05d1c7c | 2011-07-20 19:13:28 +0000 | [diff] [blame] | 122 | |
| 123 | out: |
| 124 | transport_kunmap_first_data_page(cmd); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 125 | return 0; |
| 126 | } |
| 127 | |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 128 | /* unit serial number */ |
| 129 | static int |
| 130 | target_emulate_evpd_80(struct se_cmd *cmd, unsigned char *buf) |
| 131 | { |
Andy Grover | 5951146 | 2011-07-19 10:26:37 +0000 | [diff] [blame] | 132 | struct se_device *dev = cmd->se_dev; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 133 | u16 len = 0; |
| 134 | |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 135 | if (dev->se_sub_dev->su_dev_flags & |
| 136 | SDF_EMULATED_VPD_UNIT_SERIAL) { |
| 137 | u32 unit_serial_len; |
| 138 | |
| 139 | unit_serial_len = |
Andy Grover | e3d6f90 | 2011-07-19 08:55:10 +0000 | [diff] [blame] | 140 | strlen(&dev->se_sub_dev->t10_wwn.unit_serial[0]); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 141 | unit_serial_len++; /* For NULL Terminator */ |
| 142 | |
| 143 | if (((len + 4) + unit_serial_len) > cmd->data_length) { |
| 144 | len += unit_serial_len; |
| 145 | buf[2] = ((len >> 8) & 0xff); |
| 146 | buf[3] = (len & 0xff); |
| 147 | return 0; |
| 148 | } |
| 149 | len += sprintf((unsigned char *)&buf[4], "%s", |
Andy Grover | e3d6f90 | 2011-07-19 08:55:10 +0000 | [diff] [blame] | 150 | &dev->se_sub_dev->t10_wwn.unit_serial[0]); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 151 | len++; /* Extra Byte for NULL Terminator */ |
| 152 | buf[3] = len; |
| 153 | } |
| 154 | return 0; |
| 155 | } |
| 156 | |
| 157 | /* |
| 158 | * Device identification VPD, for a complete list of |
| 159 | * DESIGNATOR TYPEs see spc4r17 Table 459. |
| 160 | */ |
| 161 | static int |
| 162 | target_emulate_evpd_83(struct se_cmd *cmd, unsigned char *buf) |
| 163 | { |
Andy Grover | 5951146 | 2011-07-19 10:26:37 +0000 | [diff] [blame] | 164 | struct se_device *dev = cmd->se_dev; |
Andy Grover | e3d6f90 | 2011-07-19 08:55:10 +0000 | [diff] [blame] | 165 | struct se_lun *lun = cmd->se_lun; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 166 | struct se_port *port = NULL; |
| 167 | struct se_portal_group *tpg = NULL; |
| 168 | struct t10_alua_lu_gp_member *lu_gp_mem; |
| 169 | struct t10_alua_tg_pt_gp *tg_pt_gp; |
| 170 | struct t10_alua_tg_pt_gp_member *tg_pt_gp_mem; |
Andy Grover | e3d6f90 | 2011-07-19 08:55:10 +0000 | [diff] [blame] | 171 | unsigned char *prod = &dev->se_sub_dev->t10_wwn.model[0]; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 172 | u32 prod_len; |
| 173 | u32 unit_serial_len, off = 0; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 174 | u16 len = 0, id_len; |
| 175 | |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 176 | off = 4; |
| 177 | |
| 178 | /* |
| 179 | * NAA IEEE Registered Extended Assigned designator format, see |
| 180 | * spc4r17 section 7.7.3.6.5 |
| 181 | * |
| 182 | * We depend upon a target_core_mod/ConfigFS provided |
| 183 | * /sys/kernel/config/target/core/$HBA/$DEV/wwn/vpd_unit_serial |
| 184 | * value in order to return the NAA id. |
| 185 | */ |
| 186 | if (!(dev->se_sub_dev->su_dev_flags & SDF_EMULATED_VPD_UNIT_SERIAL)) |
| 187 | goto check_t10_vend_desc; |
| 188 | |
| 189 | if (off + 20 > cmd->data_length) |
| 190 | goto check_t10_vend_desc; |
| 191 | |
| 192 | /* CODE SET == Binary */ |
| 193 | buf[off++] = 0x1; |
| 194 | |
Andy Shevchenko | 163cd5f | 2011-07-18 22:17:43 -0700 | [diff] [blame] | 195 | /* Set ASSOCIATION == addressed logical unit: 0)b */ |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 196 | buf[off] = 0x00; |
| 197 | |
| 198 | /* Identifier/Designator type == NAA identifier */ |
Andy Shevchenko | 163cd5f | 2011-07-18 22:17:43 -0700 | [diff] [blame] | 199 | buf[off++] |= 0x3; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 200 | off++; |
| 201 | |
| 202 | /* Identifier/Designator length */ |
| 203 | buf[off++] = 0x10; |
| 204 | |
| 205 | /* |
| 206 | * Start NAA IEEE Registered Extended Identifier/Designator |
| 207 | */ |
| 208 | buf[off++] = (0x6 << 4); |
| 209 | |
| 210 | /* |
| 211 | * Use OpenFabrics IEEE Company ID: 00 14 05 |
| 212 | */ |
| 213 | buf[off++] = 0x01; |
| 214 | buf[off++] = 0x40; |
| 215 | buf[off] = (0x5 << 4); |
| 216 | |
| 217 | /* |
| 218 | * Return ConfigFS Unit Serial Number information for |
| 219 | * VENDOR_SPECIFIC_IDENTIFIER and |
| 220 | * VENDOR_SPECIFIC_IDENTIFIER_EXTENTION |
| 221 | */ |
Andy Shevchenko | 11650b85 | 2011-07-18 22:26:40 -0700 | [diff] [blame] | 222 | buf[off++] |= hex_to_bin(dev->se_sub_dev->t10_wwn.unit_serial[0]); |
| 223 | hex2bin(&buf[off], &dev->se_sub_dev->t10_wwn.unit_serial[1], 12); |
| 224 | |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 225 | len = 20; |
| 226 | off = (len + 4); |
| 227 | |
| 228 | check_t10_vend_desc: |
| 229 | /* |
| 230 | * T10 Vendor Identifier Page, see spc4r17 section 7.7.3.4 |
| 231 | */ |
| 232 | id_len = 8; /* For Vendor field */ |
| 233 | prod_len = 4; /* For VPD Header */ |
| 234 | prod_len += 8; /* For Vendor field */ |
| 235 | prod_len += strlen(prod); |
| 236 | prod_len++; /* For : */ |
| 237 | |
| 238 | if (dev->se_sub_dev->su_dev_flags & |
| 239 | SDF_EMULATED_VPD_UNIT_SERIAL) { |
| 240 | unit_serial_len = |
Andy Grover | e3d6f90 | 2011-07-19 08:55:10 +0000 | [diff] [blame] | 241 | strlen(&dev->se_sub_dev->t10_wwn.unit_serial[0]); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 242 | unit_serial_len++; /* For NULL Terminator */ |
| 243 | |
| 244 | if ((len + (id_len + 4) + |
| 245 | (prod_len + unit_serial_len)) > |
| 246 | cmd->data_length) { |
| 247 | len += (prod_len + unit_serial_len); |
| 248 | goto check_port; |
| 249 | } |
| 250 | id_len += sprintf((unsigned char *)&buf[off+12], |
| 251 | "%s:%s", prod, |
Andy Grover | e3d6f90 | 2011-07-19 08:55:10 +0000 | [diff] [blame] | 252 | &dev->se_sub_dev->t10_wwn.unit_serial[0]); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 253 | } |
| 254 | buf[off] = 0x2; /* ASCII */ |
| 255 | buf[off+1] = 0x1; /* T10 Vendor ID */ |
| 256 | buf[off+2] = 0x0; |
| 257 | memcpy((unsigned char *)&buf[off+4], "LIO-ORG", 8); |
| 258 | /* Extra Byte for NULL Terminator */ |
| 259 | id_len++; |
| 260 | /* Identifier Length */ |
| 261 | buf[off+3] = id_len; |
| 262 | /* Header size for Designation descriptor */ |
| 263 | len += (id_len + 4); |
| 264 | off += (id_len + 4); |
| 265 | /* |
| 266 | * struct se_port is only set for INQUIRY VPD=1 through $FABRIC_MOD |
| 267 | */ |
| 268 | check_port: |
| 269 | port = lun->lun_sep; |
| 270 | if (port) { |
| 271 | struct t10_alua_lu_gp *lu_gp; |
| 272 | u32 padding, scsi_name_len; |
| 273 | u16 lu_gp_id = 0; |
| 274 | u16 tg_pt_gp_id = 0; |
| 275 | u16 tpgt; |
| 276 | |
| 277 | tpg = port->sep_tpg; |
| 278 | /* |
| 279 | * Relative target port identifer, see spc4r17 |
| 280 | * section 7.7.3.7 |
| 281 | * |
| 282 | * Get the PROTOCOL IDENTIFIER as defined by spc4r17 |
| 283 | * section 7.5.1 Table 362 |
| 284 | */ |
| 285 | if (((len + 4) + 8) > cmd->data_length) { |
| 286 | len += 8; |
| 287 | goto check_tpgi; |
| 288 | } |
| 289 | buf[off] = |
Andy Grover | e3d6f90 | 2011-07-19 08:55:10 +0000 | [diff] [blame] | 290 | (tpg->se_tpg_tfo->get_fabric_proto_ident(tpg) << 4); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 291 | buf[off++] |= 0x1; /* CODE SET == Binary */ |
| 292 | buf[off] = 0x80; /* Set PIV=1 */ |
Andy Shevchenko | 163cd5f | 2011-07-18 22:17:43 -0700 | [diff] [blame] | 293 | /* Set ASSOCIATION == target port: 01b */ |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 294 | buf[off] |= 0x10; |
| 295 | /* DESIGNATOR TYPE == Relative target port identifer */ |
| 296 | buf[off++] |= 0x4; |
| 297 | off++; /* Skip over Reserved */ |
| 298 | buf[off++] = 4; /* DESIGNATOR LENGTH */ |
| 299 | /* Skip over Obsolete field in RTPI payload |
| 300 | * in Table 472 */ |
| 301 | off += 2; |
| 302 | buf[off++] = ((port->sep_rtpi >> 8) & 0xff); |
| 303 | buf[off++] = (port->sep_rtpi & 0xff); |
| 304 | len += 8; /* Header size + Designation descriptor */ |
| 305 | /* |
| 306 | * Target port group identifier, see spc4r17 |
| 307 | * section 7.7.3.8 |
| 308 | * |
| 309 | * Get the PROTOCOL IDENTIFIER as defined by spc4r17 |
| 310 | * section 7.5.1 Table 362 |
| 311 | */ |
| 312 | check_tpgi: |
Andy Grover | e3d6f90 | 2011-07-19 08:55:10 +0000 | [diff] [blame] | 313 | if (dev->se_sub_dev->t10_alua.alua_type != |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 314 | SPC3_ALUA_EMULATED) |
| 315 | goto check_scsi_name; |
| 316 | |
| 317 | if (((len + 4) + 8) > cmd->data_length) { |
| 318 | len += 8; |
| 319 | goto check_lu_gp; |
| 320 | } |
| 321 | tg_pt_gp_mem = port->sep_alua_tg_pt_gp_mem; |
| 322 | if (!tg_pt_gp_mem) |
| 323 | goto check_lu_gp; |
| 324 | |
| 325 | spin_lock(&tg_pt_gp_mem->tg_pt_gp_mem_lock); |
| 326 | tg_pt_gp = tg_pt_gp_mem->tg_pt_gp; |
Andy Grover | 6708bb2 | 2011-06-08 10:36:43 -0700 | [diff] [blame] | 327 | if (!tg_pt_gp) { |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 328 | spin_unlock(&tg_pt_gp_mem->tg_pt_gp_mem_lock); |
| 329 | goto check_lu_gp; |
| 330 | } |
| 331 | tg_pt_gp_id = tg_pt_gp->tg_pt_gp_id; |
| 332 | spin_unlock(&tg_pt_gp_mem->tg_pt_gp_mem_lock); |
| 333 | |
| 334 | buf[off] = |
Andy Grover | e3d6f90 | 2011-07-19 08:55:10 +0000 | [diff] [blame] | 335 | (tpg->se_tpg_tfo->get_fabric_proto_ident(tpg) << 4); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 336 | buf[off++] |= 0x1; /* CODE SET == Binary */ |
| 337 | buf[off] = 0x80; /* Set PIV=1 */ |
Andy Shevchenko | 163cd5f | 2011-07-18 22:17:43 -0700 | [diff] [blame] | 338 | /* Set ASSOCIATION == target port: 01b */ |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 339 | buf[off] |= 0x10; |
| 340 | /* DESIGNATOR TYPE == Target port group identifier */ |
| 341 | buf[off++] |= 0x5; |
| 342 | off++; /* Skip over Reserved */ |
| 343 | buf[off++] = 4; /* DESIGNATOR LENGTH */ |
| 344 | off += 2; /* Skip over Reserved Field */ |
| 345 | buf[off++] = ((tg_pt_gp_id >> 8) & 0xff); |
| 346 | buf[off++] = (tg_pt_gp_id & 0xff); |
| 347 | len += 8; /* Header size + Designation descriptor */ |
| 348 | /* |
| 349 | * Logical Unit Group identifier, see spc4r17 |
| 350 | * section 7.7.3.8 |
| 351 | */ |
| 352 | check_lu_gp: |
| 353 | if (((len + 4) + 8) > cmd->data_length) { |
| 354 | len += 8; |
| 355 | goto check_scsi_name; |
| 356 | } |
| 357 | lu_gp_mem = dev->dev_alua_lu_gp_mem; |
Andy Grover | 6708bb2 | 2011-06-08 10:36:43 -0700 | [diff] [blame] | 358 | if (!lu_gp_mem) |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 359 | goto check_scsi_name; |
| 360 | |
| 361 | spin_lock(&lu_gp_mem->lu_gp_mem_lock); |
| 362 | lu_gp = lu_gp_mem->lu_gp; |
Andy Grover | 6708bb2 | 2011-06-08 10:36:43 -0700 | [diff] [blame] | 363 | if (!lu_gp) { |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 364 | spin_unlock(&lu_gp_mem->lu_gp_mem_lock); |
| 365 | goto check_scsi_name; |
| 366 | } |
| 367 | lu_gp_id = lu_gp->lu_gp_id; |
| 368 | spin_unlock(&lu_gp_mem->lu_gp_mem_lock); |
| 369 | |
| 370 | buf[off++] |= 0x1; /* CODE SET == Binary */ |
| 371 | /* DESIGNATOR TYPE == Logical Unit Group identifier */ |
| 372 | buf[off++] |= 0x6; |
| 373 | off++; /* Skip over Reserved */ |
| 374 | buf[off++] = 4; /* DESIGNATOR LENGTH */ |
| 375 | off += 2; /* Skip over Reserved Field */ |
| 376 | buf[off++] = ((lu_gp_id >> 8) & 0xff); |
| 377 | buf[off++] = (lu_gp_id & 0xff); |
| 378 | len += 8; /* Header size + Designation descriptor */ |
| 379 | /* |
| 380 | * SCSI name string designator, see spc4r17 |
| 381 | * section 7.7.3.11 |
| 382 | * |
| 383 | * Get the PROTOCOL IDENTIFIER as defined by spc4r17 |
| 384 | * section 7.5.1 Table 362 |
| 385 | */ |
| 386 | check_scsi_name: |
Andy Grover | e3d6f90 | 2011-07-19 08:55:10 +0000 | [diff] [blame] | 387 | scsi_name_len = strlen(tpg->se_tpg_tfo->tpg_get_wwn(tpg)); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 388 | /* UTF-8 ",t,0x<16-bit TPGT>" + NULL Terminator */ |
| 389 | scsi_name_len += 10; |
| 390 | /* Check for 4-byte padding */ |
| 391 | padding = ((-scsi_name_len) & 3); |
| 392 | if (padding != 0) |
| 393 | scsi_name_len += padding; |
| 394 | /* Header size + Designation descriptor */ |
| 395 | scsi_name_len += 4; |
| 396 | |
| 397 | if (((len + 4) + scsi_name_len) > cmd->data_length) { |
| 398 | len += scsi_name_len; |
| 399 | goto set_len; |
| 400 | } |
| 401 | buf[off] = |
Andy Grover | e3d6f90 | 2011-07-19 08:55:10 +0000 | [diff] [blame] | 402 | (tpg->se_tpg_tfo->get_fabric_proto_ident(tpg) << 4); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 403 | buf[off++] |= 0x3; /* CODE SET == UTF-8 */ |
| 404 | buf[off] = 0x80; /* Set PIV=1 */ |
Andy Shevchenko | 163cd5f | 2011-07-18 22:17:43 -0700 | [diff] [blame] | 405 | /* Set ASSOCIATION == target port: 01b */ |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 406 | buf[off] |= 0x10; |
| 407 | /* DESIGNATOR TYPE == SCSI name string */ |
| 408 | buf[off++] |= 0x8; |
| 409 | off += 2; /* Skip over Reserved and length */ |
| 410 | /* |
| 411 | * SCSI name string identifer containing, $FABRIC_MOD |
| 412 | * dependent information. For LIO-Target and iSCSI |
| 413 | * Target Port, this means "<iSCSI name>,t,0x<TPGT> in |
| 414 | * UTF-8 encoding. |
| 415 | */ |
Andy Grover | e3d6f90 | 2011-07-19 08:55:10 +0000 | [diff] [blame] | 416 | tpgt = tpg->se_tpg_tfo->tpg_get_tag(tpg); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 417 | scsi_name_len = sprintf(&buf[off], "%s,t,0x%04x", |
Andy Grover | e3d6f90 | 2011-07-19 08:55:10 +0000 | [diff] [blame] | 418 | tpg->se_tpg_tfo->tpg_get_wwn(tpg), tpgt); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 419 | scsi_name_len += 1 /* Include NULL terminator */; |
| 420 | /* |
| 421 | * The null-terminated, null-padded (see 4.4.2) SCSI |
| 422 | * NAME STRING field contains a UTF-8 format string. |
| 423 | * The number of bytes in the SCSI NAME STRING field |
| 424 | * (i.e., the value in the DESIGNATOR LENGTH field) |
| 425 | * shall be no larger than 256 and shall be a multiple |
| 426 | * of four. |
| 427 | */ |
| 428 | if (padding) |
| 429 | scsi_name_len += padding; |
| 430 | |
| 431 | buf[off-1] = scsi_name_len; |
| 432 | off += scsi_name_len; |
| 433 | /* Header size + Designation descriptor */ |
| 434 | len += (scsi_name_len + 4); |
| 435 | } |
| 436 | set_len: |
| 437 | buf[2] = ((len >> 8) & 0xff); |
| 438 | buf[3] = (len & 0xff); /* Page Length for VPD 0x83 */ |
| 439 | return 0; |
| 440 | } |
| 441 | |
| 442 | /* Extended INQUIRY Data VPD Page */ |
| 443 | static int |
| 444 | target_emulate_evpd_86(struct se_cmd *cmd, unsigned char *buf) |
| 445 | { |
| 446 | if (cmd->data_length < 60) |
| 447 | return 0; |
| 448 | |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 449 | buf[2] = 0x3c; |
| 450 | /* Set HEADSUP, ORDSUP, SIMPSUP */ |
| 451 | buf[5] = 0x07; |
| 452 | |
| 453 | /* If WriteCache emulation is enabled, set V_SUP */ |
Andy Grover | 5951146 | 2011-07-19 10:26:37 +0000 | [diff] [blame] | 454 | if (cmd->se_dev->se_sub_dev->se_dev_attrib.emulate_write_cache > 0) |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 455 | buf[6] = 0x01; |
| 456 | return 0; |
| 457 | } |
| 458 | |
| 459 | /* Block Limits VPD page */ |
| 460 | static int |
| 461 | target_emulate_evpd_b0(struct se_cmd *cmd, unsigned char *buf) |
| 462 | { |
Andy Grover | 5951146 | 2011-07-19 10:26:37 +0000 | [diff] [blame] | 463 | struct se_device *dev = cmd->se_dev; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 464 | int have_tp = 0; |
| 465 | |
| 466 | /* |
| 467 | * Following sbc3r22 section 6.5.3 Block Limits VPD page, when |
| 468 | * emulate_tpu=1 or emulate_tpws=1 we will be expect a |
| 469 | * different page length for Thin Provisioning. |
| 470 | */ |
Andy Grover | e3d6f90 | 2011-07-19 08:55:10 +0000 | [diff] [blame] | 471 | if (dev->se_sub_dev->se_dev_attrib.emulate_tpu || dev->se_sub_dev->se_dev_attrib.emulate_tpws) |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 472 | have_tp = 1; |
| 473 | |
| 474 | if (cmd->data_length < (0x10 + 4)) { |
Andy Grover | 6708bb2 | 2011-06-08 10:36:43 -0700 | [diff] [blame] | 475 | pr_debug("Received data_length: %u" |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 476 | " too small for EVPD 0xb0\n", |
| 477 | cmd->data_length); |
Andy Grover | e3d6f90 | 2011-07-19 08:55:10 +0000 | [diff] [blame] | 478 | return -EINVAL; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 479 | } |
| 480 | |
| 481 | if (have_tp && cmd->data_length < (0x3c + 4)) { |
Andy Grover | 6708bb2 | 2011-06-08 10:36:43 -0700 | [diff] [blame] | 482 | pr_debug("Received data_length: %u" |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 483 | " too small for TPE=1 EVPD 0xb0\n", |
| 484 | cmd->data_length); |
| 485 | have_tp = 0; |
| 486 | } |
| 487 | |
| 488 | buf[0] = dev->transport->get_device_type(dev); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 489 | buf[3] = have_tp ? 0x3c : 0x10; |
| 490 | |
Andy Grover | 6708bb2 | 2011-06-08 10:36:43 -0700 | [diff] [blame] | 491 | /* Set WSNZ to 1 */ |
| 492 | buf[4] = 0x01; |
| 493 | |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 494 | /* |
| 495 | * Set OPTIMAL TRANSFER LENGTH GRANULARITY |
| 496 | */ |
| 497 | put_unaligned_be16(1, &buf[6]); |
| 498 | |
| 499 | /* |
| 500 | * Set MAXIMUM TRANSFER LENGTH |
| 501 | */ |
Andy Grover | e3d6f90 | 2011-07-19 08:55:10 +0000 | [diff] [blame] | 502 | put_unaligned_be32(dev->se_sub_dev->se_dev_attrib.max_sectors, &buf[8]); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 503 | |
| 504 | /* |
| 505 | * Set OPTIMAL TRANSFER LENGTH |
| 506 | */ |
Andy Grover | e3d6f90 | 2011-07-19 08:55:10 +0000 | [diff] [blame] | 507 | put_unaligned_be32(dev->se_sub_dev->se_dev_attrib.optimal_sectors, &buf[12]); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 508 | |
| 509 | /* |
| 510 | * Exit now if we don't support TP or the initiator sent a too |
| 511 | * short buffer. |
| 512 | */ |
| 513 | if (!have_tp || cmd->data_length < (0x3c + 4)) |
| 514 | return 0; |
| 515 | |
| 516 | /* |
| 517 | * Set MAXIMUM UNMAP LBA COUNT |
| 518 | */ |
Andy Grover | e3d6f90 | 2011-07-19 08:55:10 +0000 | [diff] [blame] | 519 | put_unaligned_be32(dev->se_sub_dev->se_dev_attrib.max_unmap_lba_count, &buf[20]); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 520 | |
| 521 | /* |
| 522 | * Set MAXIMUM UNMAP BLOCK DESCRIPTOR COUNT |
| 523 | */ |
Andy Grover | e3d6f90 | 2011-07-19 08:55:10 +0000 | [diff] [blame] | 524 | put_unaligned_be32(dev->se_sub_dev->se_dev_attrib.max_unmap_block_desc_count, |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 525 | &buf[24]); |
| 526 | |
| 527 | /* |
| 528 | * Set OPTIMAL UNMAP GRANULARITY |
| 529 | */ |
Andy Grover | e3d6f90 | 2011-07-19 08:55:10 +0000 | [diff] [blame] | 530 | put_unaligned_be32(dev->se_sub_dev->se_dev_attrib.unmap_granularity, &buf[28]); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 531 | |
| 532 | /* |
| 533 | * UNMAP GRANULARITY ALIGNMENT |
| 534 | */ |
Andy Grover | e3d6f90 | 2011-07-19 08:55:10 +0000 | [diff] [blame] | 535 | put_unaligned_be32(dev->se_sub_dev->se_dev_attrib.unmap_granularity_alignment, |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 536 | &buf[32]); |
Andy Grover | e3d6f90 | 2011-07-19 08:55:10 +0000 | [diff] [blame] | 537 | if (dev->se_sub_dev->se_dev_attrib.unmap_granularity_alignment != 0) |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 538 | buf[32] |= 0x80; /* Set the UGAVALID bit */ |
| 539 | |
| 540 | return 0; |
| 541 | } |
| 542 | |
Roland Dreier | e22a7f0 | 2011-07-05 13:34:52 -0700 | [diff] [blame] | 543 | /* Block Device Characteristics VPD page */ |
| 544 | static int |
| 545 | target_emulate_evpd_b1(struct se_cmd *cmd, unsigned char *buf) |
| 546 | { |
| 547 | struct se_device *dev = cmd->se_dev; |
| 548 | |
| 549 | buf[0] = dev->transport->get_device_type(dev); |
| 550 | buf[3] = 0x3c; |
| 551 | |
| 552 | if (cmd->data_length >= 5 && |
| 553 | dev->se_sub_dev->se_dev_attrib.is_nonrot) |
| 554 | buf[5] = 1; |
| 555 | |
| 556 | return 0; |
| 557 | } |
| 558 | |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 559 | /* Thin Provisioning VPD */ |
| 560 | static int |
| 561 | target_emulate_evpd_b2(struct se_cmd *cmd, unsigned char *buf) |
| 562 | { |
Andy Grover | 5951146 | 2011-07-19 10:26:37 +0000 | [diff] [blame] | 563 | struct se_device *dev = cmd->se_dev; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 564 | |
| 565 | /* |
| 566 | * From sbc3r22 section 6.5.4 Thin Provisioning VPD page: |
| 567 | * |
| 568 | * The PAGE LENGTH field is defined in SPC-4. If the DP bit is set to |
| 569 | * zero, then the page length shall be set to 0004h. If the DP bit |
| 570 | * is set to one, then the page length shall be set to the value |
| 571 | * defined in table 162. |
| 572 | */ |
| 573 | buf[0] = dev->transport->get_device_type(dev); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 574 | |
| 575 | /* |
| 576 | * Set Hardcoded length mentioned above for DP=0 |
| 577 | */ |
| 578 | put_unaligned_be16(0x0004, &buf[2]); |
| 579 | |
| 580 | /* |
| 581 | * The THRESHOLD EXPONENT field indicates the threshold set size in |
| 582 | * LBAs as a power of 2 (i.e., the threshold set size is equal to |
| 583 | * 2(threshold exponent)). |
| 584 | * |
| 585 | * Note that this is currently set to 0x00 as mkp says it will be |
| 586 | * changing again. We can enable this once it has settled in T10 |
| 587 | * and is actually used by Linux/SCSI ML code. |
| 588 | */ |
| 589 | buf[4] = 0x00; |
| 590 | |
| 591 | /* |
| 592 | * A TPU bit set to one indicates that the device server supports |
| 593 | * the UNMAP command (see 5.25). A TPU bit set to zero indicates |
| 594 | * that the device server does not support the UNMAP command. |
| 595 | */ |
Andy Grover | e3d6f90 | 2011-07-19 08:55:10 +0000 | [diff] [blame] | 596 | if (dev->se_sub_dev->se_dev_attrib.emulate_tpu != 0) |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 597 | buf[5] = 0x80; |
| 598 | |
| 599 | /* |
| 600 | * A TPWS bit set to one indicates that the device server supports |
| 601 | * the use of the WRITE SAME (16) command (see 5.42) to unmap LBAs. |
| 602 | * A TPWS bit set to zero indicates that the device server does not |
| 603 | * support the use of the WRITE SAME (16) command to unmap LBAs. |
| 604 | */ |
Andy Grover | e3d6f90 | 2011-07-19 08:55:10 +0000 | [diff] [blame] | 605 | if (dev->se_sub_dev->se_dev_attrib.emulate_tpws != 0) |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 606 | buf[5] |= 0x40; |
| 607 | |
| 608 | return 0; |
| 609 | } |
| 610 | |
| 611 | static int |
Roland Dreier | b2eb705 | 2011-07-05 13:34:51 -0700 | [diff] [blame] | 612 | target_emulate_evpd_00(struct se_cmd *cmd, unsigned char *buf); |
| 613 | |
| 614 | static struct { |
| 615 | uint8_t page; |
| 616 | int (*emulate)(struct se_cmd *, unsigned char *); |
| 617 | } evpd_handlers[] = { |
| 618 | { .page = 0x00, .emulate = target_emulate_evpd_00 }, |
| 619 | { .page = 0x80, .emulate = target_emulate_evpd_80 }, |
| 620 | { .page = 0x83, .emulate = target_emulate_evpd_83 }, |
| 621 | { .page = 0x86, .emulate = target_emulate_evpd_86 }, |
| 622 | { .page = 0xb0, .emulate = target_emulate_evpd_b0 }, |
Roland Dreier | e22a7f0 | 2011-07-05 13:34:52 -0700 | [diff] [blame] | 623 | { .page = 0xb1, .emulate = target_emulate_evpd_b1 }, |
Roland Dreier | b2eb705 | 2011-07-05 13:34:51 -0700 | [diff] [blame] | 624 | { .page = 0xb2, .emulate = target_emulate_evpd_b2 }, |
| 625 | }; |
| 626 | |
| 627 | /* supported vital product data pages */ |
| 628 | static int |
| 629 | target_emulate_evpd_00(struct se_cmd *cmd, unsigned char *buf) |
| 630 | { |
| 631 | int p; |
| 632 | |
| 633 | if (cmd->data_length < 8) |
| 634 | return 0; |
| 635 | /* |
| 636 | * Only report the INQUIRY EVPD=1 pages after a valid NAA |
| 637 | * Registered Extended LUN WWN has been set via ConfigFS |
| 638 | * during device creation/restart. |
| 639 | */ |
| 640 | if (cmd->se_dev->se_sub_dev->su_dev_flags & |
| 641 | SDF_EMULATED_VPD_UNIT_SERIAL) { |
| 642 | buf[3] = ARRAY_SIZE(evpd_handlers); |
| 643 | for (p = 0; p < min_t(int, ARRAY_SIZE(evpd_handlers), |
| 644 | cmd->data_length - 4); ++p) |
| 645 | buf[p + 4] = evpd_handlers[p].page; |
| 646 | } |
| 647 | |
| 648 | return 0; |
| 649 | } |
| 650 | |
| 651 | static int |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 652 | target_emulate_inquiry(struct se_cmd *cmd) |
| 653 | { |
Andy Grover | 5951146 | 2011-07-19 10:26:37 +0000 | [diff] [blame] | 654 | struct se_device *dev = cmd->se_dev; |
Andy Grover | 05d1c7c | 2011-07-20 19:13:28 +0000 | [diff] [blame] | 655 | unsigned char *buf; |
Andy Grover | a1d8b49 | 2011-05-02 17:12:10 -0700 | [diff] [blame] | 656 | unsigned char *cdb = cmd->t_task_cdb; |
Andy Grover | 05d1c7c | 2011-07-20 19:13:28 +0000 | [diff] [blame] | 657 | int p, ret; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 658 | |
| 659 | if (!(cdb[1] & 0x1)) |
| 660 | return target_emulate_inquiry_std(cmd); |
| 661 | |
| 662 | /* |
| 663 | * Make sure we at least have 4 bytes of INQUIRY response |
| 664 | * payload for 0x00 going back for EVPD=1. Note that 0x80 |
| 665 | * and 0x83 will check for enough payload data length and |
| 666 | * jump to set_len: label when there is not enough inquiry EVPD |
| 667 | * payload length left for the next outgoing EVPD metadata |
| 668 | */ |
| 669 | if (cmd->data_length < 4) { |
Andy Grover | 6708bb2 | 2011-06-08 10:36:43 -0700 | [diff] [blame] | 670 | pr_err("SCSI Inquiry payload length: %u" |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 671 | " too small for EVPD=1\n", cmd->data_length); |
Andy Grover | e3d6f90 | 2011-07-19 08:55:10 +0000 | [diff] [blame] | 672 | return -EINVAL; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 673 | } |
Andy Grover | 05d1c7c | 2011-07-20 19:13:28 +0000 | [diff] [blame] | 674 | |
| 675 | buf = transport_kmap_first_data_page(cmd); |
| 676 | |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 677 | buf[0] = dev->transport->get_device_type(dev); |
| 678 | |
Roland Dreier | b2eb705 | 2011-07-05 13:34:51 -0700 | [diff] [blame] | 679 | for (p = 0; p < ARRAY_SIZE(evpd_handlers); ++p) |
| 680 | if (cdb[2] == evpd_handlers[p].page) { |
| 681 | buf[1] = cdb[2]; |
Andy Grover | 05d1c7c | 2011-07-20 19:13:28 +0000 | [diff] [blame] | 682 | ret = evpd_handlers[p].emulate(cmd, buf); |
| 683 | transport_kunmap_first_data_page(cmd); |
| 684 | return ret; |
Roland Dreier | b2eb705 | 2011-07-05 13:34:51 -0700 | [diff] [blame] | 685 | } |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 686 | |
Andy Grover | 05d1c7c | 2011-07-20 19:13:28 +0000 | [diff] [blame] | 687 | transport_kunmap_first_data_page(cmd); |
Andy Grover | 6708bb2 | 2011-06-08 10:36:43 -0700 | [diff] [blame] | 688 | pr_err("Unknown VPD Code: 0x%02x\n", cdb[2]); |
Roland Dreier | b2eb705 | 2011-07-05 13:34:51 -0700 | [diff] [blame] | 689 | return -EINVAL; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 690 | } |
| 691 | |
| 692 | static int |
| 693 | target_emulate_readcapacity(struct se_cmd *cmd) |
| 694 | { |
Andy Grover | 5951146 | 2011-07-19 10:26:37 +0000 | [diff] [blame] | 695 | struct se_device *dev = cmd->se_dev; |
Andy Grover | 05d1c7c | 2011-07-20 19:13:28 +0000 | [diff] [blame] | 696 | unsigned char *buf; |
Nicholas Bellinger | 904f0bc | 2011-03-02 15:52:51 -0800 | [diff] [blame] | 697 | unsigned long long blocks_long = dev->transport->get_blocks(dev); |
| 698 | u32 blocks; |
| 699 | |
| 700 | if (blocks_long >= 0x00000000ffffffff) |
| 701 | blocks = 0xffffffff; |
| 702 | else |
| 703 | blocks = (u32)blocks_long; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 704 | |
Andy Grover | 05d1c7c | 2011-07-20 19:13:28 +0000 | [diff] [blame] | 705 | buf = transport_kmap_first_data_page(cmd); |
| 706 | |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 707 | buf[0] = (blocks >> 24) & 0xff; |
| 708 | buf[1] = (blocks >> 16) & 0xff; |
| 709 | buf[2] = (blocks >> 8) & 0xff; |
| 710 | buf[3] = blocks & 0xff; |
Andy Grover | e3d6f90 | 2011-07-19 08:55:10 +0000 | [diff] [blame] | 711 | buf[4] = (dev->se_sub_dev->se_dev_attrib.block_size >> 24) & 0xff; |
| 712 | buf[5] = (dev->se_sub_dev->se_dev_attrib.block_size >> 16) & 0xff; |
| 713 | buf[6] = (dev->se_sub_dev->se_dev_attrib.block_size >> 8) & 0xff; |
| 714 | buf[7] = dev->se_sub_dev->se_dev_attrib.block_size & 0xff; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 715 | /* |
| 716 | * Set max 32-bit blocks to signal SERVICE ACTION READ_CAPACITY_16 |
| 717 | */ |
Andy Grover | e3d6f90 | 2011-07-19 08:55:10 +0000 | [diff] [blame] | 718 | if (dev->se_sub_dev->se_dev_attrib.emulate_tpu || dev->se_sub_dev->se_dev_attrib.emulate_tpws) |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 719 | put_unaligned_be32(0xFFFFFFFF, &buf[0]); |
| 720 | |
Andy Grover | 05d1c7c | 2011-07-20 19:13:28 +0000 | [diff] [blame] | 721 | transport_kunmap_first_data_page(cmd); |
| 722 | |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 723 | return 0; |
| 724 | } |
| 725 | |
| 726 | static int |
| 727 | target_emulate_readcapacity_16(struct se_cmd *cmd) |
| 728 | { |
Andy Grover | 5951146 | 2011-07-19 10:26:37 +0000 | [diff] [blame] | 729 | struct se_device *dev = cmd->se_dev; |
Andy Grover | 05d1c7c | 2011-07-20 19:13:28 +0000 | [diff] [blame] | 730 | unsigned char *buf; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 731 | unsigned long long blocks = dev->transport->get_blocks(dev); |
| 732 | |
Andy Grover | 05d1c7c | 2011-07-20 19:13:28 +0000 | [diff] [blame] | 733 | buf = transport_kmap_first_data_page(cmd); |
| 734 | |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 735 | buf[0] = (blocks >> 56) & 0xff; |
| 736 | buf[1] = (blocks >> 48) & 0xff; |
| 737 | buf[2] = (blocks >> 40) & 0xff; |
| 738 | buf[3] = (blocks >> 32) & 0xff; |
| 739 | buf[4] = (blocks >> 24) & 0xff; |
| 740 | buf[5] = (blocks >> 16) & 0xff; |
| 741 | buf[6] = (blocks >> 8) & 0xff; |
| 742 | buf[7] = blocks & 0xff; |
Andy Grover | e3d6f90 | 2011-07-19 08:55:10 +0000 | [diff] [blame] | 743 | buf[8] = (dev->se_sub_dev->se_dev_attrib.block_size >> 24) & 0xff; |
| 744 | buf[9] = (dev->se_sub_dev->se_dev_attrib.block_size >> 16) & 0xff; |
| 745 | buf[10] = (dev->se_sub_dev->se_dev_attrib.block_size >> 8) & 0xff; |
| 746 | buf[11] = dev->se_sub_dev->se_dev_attrib.block_size & 0xff; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 747 | /* |
| 748 | * Set Thin Provisioning Enable bit following sbc3r22 in section |
| 749 | * READ CAPACITY (16) byte 14 if emulate_tpu or emulate_tpws is enabled. |
| 750 | */ |
Andy Grover | e3d6f90 | 2011-07-19 08:55:10 +0000 | [diff] [blame] | 751 | if (dev->se_sub_dev->se_dev_attrib.emulate_tpu || dev->se_sub_dev->se_dev_attrib.emulate_tpws) |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 752 | buf[14] = 0x80; |
| 753 | |
Andy Grover | 05d1c7c | 2011-07-20 19:13:28 +0000 | [diff] [blame] | 754 | transport_kunmap_first_data_page(cmd); |
| 755 | |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 756 | return 0; |
| 757 | } |
| 758 | |
| 759 | static int |
| 760 | target_modesense_rwrecovery(unsigned char *p) |
| 761 | { |
| 762 | p[0] = 0x01; |
| 763 | p[1] = 0x0a; |
| 764 | |
| 765 | return 12; |
| 766 | } |
| 767 | |
| 768 | static int |
| 769 | target_modesense_control(struct se_device *dev, unsigned char *p) |
| 770 | { |
| 771 | p[0] = 0x0a; |
| 772 | p[1] = 0x0a; |
| 773 | p[2] = 2; |
| 774 | /* |
Nicholas Bellinger | 5de619a | 2011-07-17 02:57:58 -0700 | [diff] [blame] | 775 | * From spc4r23, 7.4.7 Control mode page |
| 776 | * |
| 777 | * The QUEUE ALGORITHM MODIFIER field (see table 368) specifies |
| 778 | * restrictions on the algorithm used for reordering commands |
| 779 | * having the SIMPLE task attribute (see SAM-4). |
| 780 | * |
| 781 | * Table 368 -- QUEUE ALGORITHM MODIFIER field |
| 782 | * Code Description |
| 783 | * 0h Restricted reordering |
| 784 | * 1h Unrestricted reordering allowed |
| 785 | * 2h to 7h Reserved |
| 786 | * 8h to Fh Vendor specific |
| 787 | * |
| 788 | * A value of zero in the QUEUE ALGORITHM MODIFIER field specifies that |
| 789 | * the device server shall order the processing sequence of commands |
| 790 | * having the SIMPLE task attribute such that data integrity is maintained |
| 791 | * for that I_T nexus (i.e., if the transmission of new SCSI transport protocol |
| 792 | * requests is halted at any time, the final value of all data observable |
| 793 | * on the medium shall be the same as if all the commands had been processed |
| 794 | * with the ORDERED task attribute). |
| 795 | * |
| 796 | * A value of one in the QUEUE ALGORITHM MODIFIER field specifies that the |
| 797 | * device server may reorder the processing sequence of commands having the |
| 798 | * SIMPLE task attribute in any manner. Any data integrity exposures related to |
| 799 | * command sequence order shall be explicitly handled by the application client |
| 800 | * through the selection of appropriate ommands and task attributes. |
| 801 | */ |
| 802 | p[3] = (dev->se_sub_dev->se_dev_attrib.emulate_rest_reord == 1) ? 0x00 : 0x10; |
| 803 | /* |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 804 | * From spc4r17, section 7.4.6 Control mode Page |
| 805 | * |
| 806 | * Unit Attention interlocks control (UN_INTLCK_CTRL) to code 00b |
| 807 | * |
| 808 | * 00b: The logical unit shall clear any unit attention condition |
| 809 | * reported in the same I_T_L_Q nexus transaction as a CHECK CONDITION |
| 810 | * status and shall not establish a unit attention condition when a com- |
| 811 | * mand is completed with BUSY, TASK SET FULL, or RESERVATION CONFLICT |
| 812 | * status. |
| 813 | * |
| 814 | * 10b: The logical unit shall not clear any unit attention condition |
| 815 | * reported in the same I_T_L_Q nexus transaction as a CHECK CONDITION |
| 816 | * status and shall not establish a unit attention condition when |
| 817 | * a command is completed with BUSY, TASK SET FULL, or RESERVATION |
| 818 | * CONFLICT status. |
| 819 | * |
| 820 | * 11b a The logical unit shall not clear any unit attention condition |
| 821 | * reported in the same I_T_L_Q nexus transaction as a CHECK CONDITION |
| 822 | * status and shall establish a unit attention condition for the |
| 823 | * initiator port associated with the I_T nexus on which the BUSY, |
| 824 | * TASK SET FULL, or RESERVATION CONFLICT status is being returned. |
| 825 | * Depending on the status, the additional sense code shall be set to |
| 826 | * PREVIOUS BUSY STATUS, PREVIOUS TASK SET FULL STATUS, or PREVIOUS |
| 827 | * RESERVATION CONFLICT STATUS. Until it is cleared by a REQUEST SENSE |
| 828 | * command, a unit attention condition shall be established only once |
| 829 | * for a BUSY, TASK SET FULL, or RESERVATION CONFLICT status regardless |
| 830 | * to the number of commands completed with one of those status codes. |
| 831 | */ |
Andy Grover | e3d6f90 | 2011-07-19 08:55:10 +0000 | [diff] [blame] | 832 | p[4] = (dev->se_sub_dev->se_dev_attrib.emulate_ua_intlck_ctrl == 2) ? 0x30 : |
| 833 | (dev->se_sub_dev->se_dev_attrib.emulate_ua_intlck_ctrl == 1) ? 0x20 : 0x00; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 834 | /* |
| 835 | * From spc4r17, section 7.4.6 Control mode Page |
| 836 | * |
| 837 | * Task Aborted Status (TAS) bit set to zero. |
| 838 | * |
| 839 | * A task aborted status (TAS) bit set to zero specifies that aborted |
| 840 | * tasks shall be terminated by the device server without any response |
| 841 | * to the application client. A TAS bit set to one specifies that tasks |
| 842 | * aborted by the actions of an I_T nexus other than the I_T nexus on |
| 843 | * which the command was received shall be completed with TASK ABORTED |
| 844 | * status (see SAM-4). |
| 845 | */ |
Andy Grover | e3d6f90 | 2011-07-19 08:55:10 +0000 | [diff] [blame] | 846 | p[5] = (dev->se_sub_dev->se_dev_attrib.emulate_tas) ? 0x40 : 0x00; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 847 | p[8] = 0xff; |
| 848 | p[9] = 0xff; |
| 849 | p[11] = 30; |
| 850 | |
| 851 | return 12; |
| 852 | } |
| 853 | |
| 854 | static int |
| 855 | target_modesense_caching(struct se_device *dev, unsigned char *p) |
| 856 | { |
| 857 | p[0] = 0x08; |
| 858 | p[1] = 0x12; |
Andy Grover | e3d6f90 | 2011-07-19 08:55:10 +0000 | [diff] [blame] | 859 | if (dev->se_sub_dev->se_dev_attrib.emulate_write_cache > 0) |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 860 | p[2] = 0x04; /* Write Cache Enable */ |
| 861 | p[12] = 0x20; /* Disabled Read Ahead */ |
| 862 | |
| 863 | return 20; |
| 864 | } |
| 865 | |
| 866 | static void |
| 867 | target_modesense_write_protect(unsigned char *buf, int type) |
| 868 | { |
| 869 | /* |
| 870 | * I believe that the WP bit (bit 7) in the mode header is the same for |
| 871 | * all device types.. |
| 872 | */ |
| 873 | switch (type) { |
| 874 | case TYPE_DISK: |
| 875 | case TYPE_TAPE: |
| 876 | default: |
| 877 | buf[0] |= 0x80; /* WP bit */ |
| 878 | break; |
| 879 | } |
| 880 | } |
| 881 | |
| 882 | static void |
| 883 | target_modesense_dpofua(unsigned char *buf, int type) |
| 884 | { |
| 885 | switch (type) { |
| 886 | case TYPE_DISK: |
| 887 | buf[0] |= 0x10; /* DPOFUA bit */ |
| 888 | break; |
| 889 | default: |
| 890 | break; |
| 891 | } |
| 892 | } |
| 893 | |
| 894 | static int |
| 895 | target_emulate_modesense(struct se_cmd *cmd, int ten) |
| 896 | { |
Andy Grover | 5951146 | 2011-07-19 10:26:37 +0000 | [diff] [blame] | 897 | struct se_device *dev = cmd->se_dev; |
Andy Grover | a1d8b49 | 2011-05-02 17:12:10 -0700 | [diff] [blame] | 898 | char *cdb = cmd->t_task_cdb; |
Andy Grover | 05d1c7c | 2011-07-20 19:13:28 +0000 | [diff] [blame] | 899 | unsigned char *rbuf; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 900 | int type = dev->transport->get_device_type(dev); |
| 901 | int offset = (ten) ? 8 : 4; |
| 902 | int length = 0; |
| 903 | unsigned char buf[SE_MODE_PAGE_BUF]; |
| 904 | |
| 905 | memset(buf, 0, SE_MODE_PAGE_BUF); |
| 906 | |
| 907 | switch (cdb[2] & 0x3f) { |
| 908 | case 0x01: |
| 909 | length = target_modesense_rwrecovery(&buf[offset]); |
| 910 | break; |
| 911 | case 0x08: |
| 912 | length = target_modesense_caching(dev, &buf[offset]); |
| 913 | break; |
| 914 | case 0x0a: |
| 915 | length = target_modesense_control(dev, &buf[offset]); |
| 916 | break; |
| 917 | case 0x3f: |
| 918 | length = target_modesense_rwrecovery(&buf[offset]); |
| 919 | length += target_modesense_caching(dev, &buf[offset+length]); |
| 920 | length += target_modesense_control(dev, &buf[offset+length]); |
| 921 | break; |
| 922 | default: |
Andy Grover | 6708bb2 | 2011-06-08 10:36:43 -0700 | [diff] [blame] | 923 | pr_err("Got Unknown Mode Page: 0x%02x\n", |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 924 | cdb[2] & 0x3f); |
| 925 | return PYX_TRANSPORT_UNKNOWN_MODE_PAGE; |
| 926 | } |
| 927 | offset += length; |
| 928 | |
| 929 | if (ten) { |
| 930 | offset -= 2; |
| 931 | buf[0] = (offset >> 8) & 0xff; |
| 932 | buf[1] = offset & 0xff; |
| 933 | |
Andy Grover | e3d6f90 | 2011-07-19 08:55:10 +0000 | [diff] [blame] | 934 | if ((cmd->se_lun->lun_access & TRANSPORT_LUNFLAGS_READ_ONLY) || |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 935 | (cmd->se_deve && |
| 936 | (cmd->se_deve->lun_flags & TRANSPORT_LUNFLAGS_READ_ONLY))) |
| 937 | target_modesense_write_protect(&buf[3], type); |
| 938 | |
Andy Grover | e3d6f90 | 2011-07-19 08:55:10 +0000 | [diff] [blame] | 939 | if ((dev->se_sub_dev->se_dev_attrib.emulate_write_cache > 0) && |
| 940 | (dev->se_sub_dev->se_dev_attrib.emulate_fua_write > 0)) |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 941 | target_modesense_dpofua(&buf[3], type); |
| 942 | |
| 943 | if ((offset + 2) > cmd->data_length) |
| 944 | offset = cmd->data_length; |
| 945 | |
| 946 | } else { |
| 947 | offset -= 1; |
| 948 | buf[0] = offset & 0xff; |
| 949 | |
Andy Grover | e3d6f90 | 2011-07-19 08:55:10 +0000 | [diff] [blame] | 950 | if ((cmd->se_lun->lun_access & TRANSPORT_LUNFLAGS_READ_ONLY) || |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 951 | (cmd->se_deve && |
| 952 | (cmd->se_deve->lun_flags & TRANSPORT_LUNFLAGS_READ_ONLY))) |
| 953 | target_modesense_write_protect(&buf[2], type); |
| 954 | |
Andy Grover | e3d6f90 | 2011-07-19 08:55:10 +0000 | [diff] [blame] | 955 | if ((dev->se_sub_dev->se_dev_attrib.emulate_write_cache > 0) && |
| 956 | (dev->se_sub_dev->se_dev_attrib.emulate_fua_write > 0)) |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 957 | target_modesense_dpofua(&buf[2], type); |
| 958 | |
| 959 | if ((offset + 1) > cmd->data_length) |
| 960 | offset = cmd->data_length; |
| 961 | } |
Andy Grover | 05d1c7c | 2011-07-20 19:13:28 +0000 | [diff] [blame] | 962 | |
| 963 | rbuf = transport_kmap_first_data_page(cmd); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 964 | memcpy(rbuf, buf, offset); |
Andy Grover | 05d1c7c | 2011-07-20 19:13:28 +0000 | [diff] [blame] | 965 | transport_kunmap_first_data_page(cmd); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 966 | |
| 967 | return 0; |
| 968 | } |
| 969 | |
| 970 | static int |
| 971 | target_emulate_request_sense(struct se_cmd *cmd) |
| 972 | { |
Andy Grover | a1d8b49 | 2011-05-02 17:12:10 -0700 | [diff] [blame] | 973 | unsigned char *cdb = cmd->t_task_cdb; |
Andy Grover | 05d1c7c | 2011-07-20 19:13:28 +0000 | [diff] [blame] | 974 | unsigned char *buf; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 975 | u8 ua_asc = 0, ua_ascq = 0; |
Andy Grover | 05d1c7c | 2011-07-20 19:13:28 +0000 | [diff] [blame] | 976 | int err = 0; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 977 | |
| 978 | if (cdb[1] & 0x01) { |
Andy Grover | 6708bb2 | 2011-06-08 10:36:43 -0700 | [diff] [blame] | 979 | pr_err("REQUEST_SENSE description emulation not" |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 980 | " supported\n"); |
| 981 | return PYX_TRANSPORT_INVALID_CDB_FIELD; |
| 982 | } |
Andy Grover | 05d1c7c | 2011-07-20 19:13:28 +0000 | [diff] [blame] | 983 | |
| 984 | buf = transport_kmap_first_data_page(cmd); |
| 985 | |
Andy Grover | 6708bb2 | 2011-06-08 10:36:43 -0700 | [diff] [blame] | 986 | if (!core_scsi3_ua_clear_for_request_sense(cmd, &ua_asc, &ua_ascq)) { |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 987 | /* |
| 988 | * CURRENT ERROR, UNIT ATTENTION |
| 989 | */ |
| 990 | buf[0] = 0x70; |
| 991 | buf[SPC_SENSE_KEY_OFFSET] = UNIT_ATTENTION; |
| 992 | /* |
| 993 | * Make sure request data length is enough for additional |
| 994 | * sense data. |
| 995 | */ |
| 996 | if (cmd->data_length <= 18) { |
| 997 | buf[7] = 0x00; |
Andy Grover | 05d1c7c | 2011-07-20 19:13:28 +0000 | [diff] [blame] | 998 | err = -EINVAL; |
| 999 | goto end; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 1000 | } |
| 1001 | /* |
| 1002 | * The Additional Sense Code (ASC) from the UNIT ATTENTION |
| 1003 | */ |
| 1004 | buf[SPC_ASC_KEY_OFFSET] = ua_asc; |
| 1005 | buf[SPC_ASCQ_KEY_OFFSET] = ua_ascq; |
| 1006 | buf[7] = 0x0A; |
| 1007 | } else { |
| 1008 | /* |
| 1009 | * CURRENT ERROR, NO SENSE |
| 1010 | */ |
| 1011 | buf[0] = 0x70; |
| 1012 | buf[SPC_SENSE_KEY_OFFSET] = NO_SENSE; |
| 1013 | /* |
| 1014 | * Make sure request data length is enough for additional |
| 1015 | * sense data. |
| 1016 | */ |
| 1017 | if (cmd->data_length <= 18) { |
| 1018 | buf[7] = 0x00; |
Andy Grover | 05d1c7c | 2011-07-20 19:13:28 +0000 | [diff] [blame] | 1019 | err = -EINVAL; |
| 1020 | goto end; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 1021 | } |
| 1022 | /* |
| 1023 | * NO ADDITIONAL SENSE INFORMATION |
| 1024 | */ |
| 1025 | buf[SPC_ASC_KEY_OFFSET] = 0x00; |
| 1026 | buf[7] = 0x0A; |
| 1027 | } |
| 1028 | |
Andy Grover | 05d1c7c | 2011-07-20 19:13:28 +0000 | [diff] [blame] | 1029 | end: |
| 1030 | transport_kunmap_first_data_page(cmd); |
| 1031 | |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 1032 | return 0; |
| 1033 | } |
| 1034 | |
| 1035 | /* |
| 1036 | * Used for TCM/IBLOCK and TCM/FILEIO for block/blk-lib.c level discard support. |
| 1037 | * Note this is not used for TCM/pSCSI passthrough |
| 1038 | */ |
| 1039 | static int |
| 1040 | target_emulate_unmap(struct se_task *task) |
| 1041 | { |
Andy Grover | e3d6f90 | 2011-07-19 08:55:10 +0000 | [diff] [blame] | 1042 | struct se_cmd *cmd = task->task_se_cmd; |
Andy Grover | 5951146 | 2011-07-19 10:26:37 +0000 | [diff] [blame] | 1043 | struct se_device *dev = cmd->se_dev; |
Andy Grover | 05d1c7c | 2011-07-20 19:13:28 +0000 | [diff] [blame] | 1044 | unsigned char *buf, *ptr = NULL; |
Andy Grover | a1d8b49 | 2011-05-02 17:12:10 -0700 | [diff] [blame] | 1045 | unsigned char *cdb = &cmd->t_task_cdb[0]; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 1046 | sector_t lba; |
| 1047 | unsigned int size = cmd->data_length, range; |
Andy Grover | 05d1c7c | 2011-07-20 19:13:28 +0000 | [diff] [blame] | 1048 | int ret = 0, offset; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 1049 | unsigned short dl, bd_dl; |
| 1050 | |
| 1051 | /* First UNMAP block descriptor starts at 8 byte offset */ |
| 1052 | offset = 8; |
| 1053 | size -= 8; |
| 1054 | dl = get_unaligned_be16(&cdb[0]); |
| 1055 | bd_dl = get_unaligned_be16(&cdb[2]); |
Andy Grover | 05d1c7c | 2011-07-20 19:13:28 +0000 | [diff] [blame] | 1056 | |
| 1057 | buf = transport_kmap_first_data_page(cmd); |
| 1058 | |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 1059 | ptr = &buf[offset]; |
Andy Grover | 6708bb2 | 2011-06-08 10:36:43 -0700 | [diff] [blame] | 1060 | pr_debug("UNMAP: Sub: %s Using dl: %hu bd_dl: %hu size: %hu" |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 1061 | " ptr: %p\n", dev->transport->name, dl, bd_dl, size, ptr); |
| 1062 | |
| 1063 | while (size) { |
| 1064 | lba = get_unaligned_be64(&ptr[0]); |
| 1065 | range = get_unaligned_be32(&ptr[8]); |
Andy Grover | 6708bb2 | 2011-06-08 10:36:43 -0700 | [diff] [blame] | 1066 | pr_debug("UNMAP: Using lba: %llu and range: %u\n", |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 1067 | (unsigned long long)lba, range); |
| 1068 | |
| 1069 | ret = dev->transport->do_discard(dev, lba, range); |
| 1070 | if (ret < 0) { |
Andy Grover | 6708bb2 | 2011-06-08 10:36:43 -0700 | [diff] [blame] | 1071 | pr_err("blkdev_issue_discard() failed: %d\n", |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 1072 | ret); |
Andy Grover | 05d1c7c | 2011-07-20 19:13:28 +0000 | [diff] [blame] | 1073 | goto err; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 1074 | } |
| 1075 | |
| 1076 | ptr += 16; |
| 1077 | size -= 16; |
| 1078 | } |
| 1079 | |
| 1080 | task->task_scsi_status = GOOD; |
| 1081 | transport_complete_task(task, 1); |
Andy Grover | 05d1c7c | 2011-07-20 19:13:28 +0000 | [diff] [blame] | 1082 | err: |
| 1083 | transport_kunmap_first_data_page(cmd); |
| 1084 | |
| 1085 | return ret; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 1086 | } |
| 1087 | |
| 1088 | /* |
| 1089 | * Used for TCM/IBLOCK and TCM/FILEIO for block/blk-lib.c level discard support. |
| 1090 | * Note this is not used for TCM/pSCSI passthrough |
| 1091 | */ |
| 1092 | static int |
Nicholas Bellinger | dd3a5ad | 2011-05-06 17:55:35 -0700 | [diff] [blame] | 1093 | target_emulate_write_same(struct se_task *task, int write_same32) |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 1094 | { |
Andy Grover | e3d6f90 | 2011-07-19 08:55:10 +0000 | [diff] [blame] | 1095 | struct se_cmd *cmd = task->task_se_cmd; |
Andy Grover | 5951146 | 2011-07-19 10:26:37 +0000 | [diff] [blame] | 1096 | struct se_device *dev = cmd->se_dev; |
Andy Grover | a1d8b49 | 2011-05-02 17:12:10 -0700 | [diff] [blame] | 1097 | sector_t range; |
| 1098 | sector_t lba = cmd->t_task_lba; |
Nicholas Bellinger | dd3a5ad | 2011-05-06 17:55:35 -0700 | [diff] [blame] | 1099 | unsigned int num_blocks; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 1100 | int ret; |
Nicholas Bellinger | dd3a5ad | 2011-05-06 17:55:35 -0700 | [diff] [blame] | 1101 | /* |
| 1102 | * Extract num_blocks from the WRITE_SAME_* CDB. Then use the explict |
| 1103 | * range when non zero is supplied, otherwise calculate the remaining |
| 1104 | * range based on ->get_blocks() - starting LBA. |
| 1105 | */ |
| 1106 | if (write_same32) |
Andy Grover | a1d8b49 | 2011-05-02 17:12:10 -0700 | [diff] [blame] | 1107 | num_blocks = get_unaligned_be32(&cmd->t_task_cdb[28]); |
Nicholas Bellinger | dd3a5ad | 2011-05-06 17:55:35 -0700 | [diff] [blame] | 1108 | else |
Andy Grover | a1d8b49 | 2011-05-02 17:12:10 -0700 | [diff] [blame] | 1109 | num_blocks = get_unaligned_be32(&cmd->t_task_cdb[10]); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 1110 | |
Nicholas Bellinger | dd3a5ad | 2011-05-06 17:55:35 -0700 | [diff] [blame] | 1111 | if (num_blocks != 0) |
| 1112 | range = num_blocks; |
| 1113 | else |
| 1114 | range = (dev->transport->get_blocks(dev) - lba); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 1115 | |
Andy Grover | 6708bb2 | 2011-06-08 10:36:43 -0700 | [diff] [blame] | 1116 | pr_debug("WRITE_SAME UNMAP: LBA: %llu Range: %llu\n", |
Nicholas Bellinger | dd3a5ad | 2011-05-06 17:55:35 -0700 | [diff] [blame] | 1117 | (unsigned long long)lba, (unsigned long long)range); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 1118 | |
| 1119 | ret = dev->transport->do_discard(dev, lba, range); |
| 1120 | if (ret < 0) { |
Andy Grover | 6708bb2 | 2011-06-08 10:36:43 -0700 | [diff] [blame] | 1121 | pr_debug("blkdev_issue_discard() failed for WRITE_SAME\n"); |
Andy Grover | e3d6f90 | 2011-07-19 08:55:10 +0000 | [diff] [blame] | 1122 | return ret; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 1123 | } |
| 1124 | |
| 1125 | task->task_scsi_status = GOOD; |
| 1126 | transport_complete_task(task, 1); |
| 1127 | return 0; |
| 1128 | } |
| 1129 | |
| 1130 | int |
| 1131 | transport_emulate_control_cdb(struct se_task *task) |
| 1132 | { |
Andy Grover | e3d6f90 | 2011-07-19 08:55:10 +0000 | [diff] [blame] | 1133 | struct se_cmd *cmd = task->task_se_cmd; |
Andy Grover | 5951146 | 2011-07-19 10:26:37 +0000 | [diff] [blame] | 1134 | struct se_device *dev = cmd->se_dev; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 1135 | unsigned short service_action; |
| 1136 | int ret = 0; |
| 1137 | |
Andy Grover | a1d8b49 | 2011-05-02 17:12:10 -0700 | [diff] [blame] | 1138 | switch (cmd->t_task_cdb[0]) { |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 1139 | case INQUIRY: |
| 1140 | ret = target_emulate_inquiry(cmd); |
| 1141 | break; |
| 1142 | case READ_CAPACITY: |
| 1143 | ret = target_emulate_readcapacity(cmd); |
| 1144 | break; |
| 1145 | case MODE_SENSE: |
| 1146 | ret = target_emulate_modesense(cmd, 0); |
| 1147 | break; |
| 1148 | case MODE_SENSE_10: |
| 1149 | ret = target_emulate_modesense(cmd, 1); |
| 1150 | break; |
| 1151 | case SERVICE_ACTION_IN: |
Andy Grover | a1d8b49 | 2011-05-02 17:12:10 -0700 | [diff] [blame] | 1152 | switch (cmd->t_task_cdb[1] & 0x1f) { |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 1153 | case SAI_READ_CAPACITY_16: |
| 1154 | ret = target_emulate_readcapacity_16(cmd); |
| 1155 | break; |
| 1156 | default: |
Andy Grover | 6708bb2 | 2011-06-08 10:36:43 -0700 | [diff] [blame] | 1157 | pr_err("Unsupported SA: 0x%02x\n", |
Andy Grover | a1d8b49 | 2011-05-02 17:12:10 -0700 | [diff] [blame] | 1158 | cmd->t_task_cdb[1] & 0x1f); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 1159 | return PYX_TRANSPORT_UNKNOWN_SAM_OPCODE; |
| 1160 | } |
| 1161 | break; |
| 1162 | case REQUEST_SENSE: |
| 1163 | ret = target_emulate_request_sense(cmd); |
| 1164 | break; |
| 1165 | case UNMAP: |
| 1166 | if (!dev->transport->do_discard) { |
Andy Grover | 6708bb2 | 2011-06-08 10:36:43 -0700 | [diff] [blame] | 1167 | pr_err("UNMAP emulation not supported for: %s\n", |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 1168 | dev->transport->name); |
| 1169 | return PYX_TRANSPORT_UNKNOWN_SAM_OPCODE; |
| 1170 | } |
| 1171 | ret = target_emulate_unmap(task); |
| 1172 | break; |
| 1173 | case WRITE_SAME_16: |
| 1174 | if (!dev->transport->do_discard) { |
Andy Grover | 6708bb2 | 2011-06-08 10:36:43 -0700 | [diff] [blame] | 1175 | pr_err("WRITE_SAME_16 emulation not supported" |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 1176 | " for: %s\n", dev->transport->name); |
| 1177 | return PYX_TRANSPORT_UNKNOWN_SAM_OPCODE; |
| 1178 | } |
Nicholas Bellinger | dd3a5ad | 2011-05-06 17:55:35 -0700 | [diff] [blame] | 1179 | ret = target_emulate_write_same(task, 0); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 1180 | break; |
| 1181 | case VARIABLE_LENGTH_CMD: |
| 1182 | service_action = |
Andy Grover | a1d8b49 | 2011-05-02 17:12:10 -0700 | [diff] [blame] | 1183 | get_unaligned_be16(&cmd->t_task_cdb[8]); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 1184 | switch (service_action) { |
| 1185 | case WRITE_SAME_32: |
| 1186 | if (!dev->transport->do_discard) { |
Andy Grover | 6708bb2 | 2011-06-08 10:36:43 -0700 | [diff] [blame] | 1187 | pr_err("WRITE_SAME_32 SA emulation not" |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 1188 | " supported for: %s\n", |
| 1189 | dev->transport->name); |
| 1190 | return PYX_TRANSPORT_UNKNOWN_SAM_OPCODE; |
| 1191 | } |
Nicholas Bellinger | dd3a5ad | 2011-05-06 17:55:35 -0700 | [diff] [blame] | 1192 | ret = target_emulate_write_same(task, 1); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 1193 | break; |
| 1194 | default: |
Andy Grover | 6708bb2 | 2011-06-08 10:36:43 -0700 | [diff] [blame] | 1195 | pr_err("Unsupported VARIABLE_LENGTH_CMD SA:" |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 1196 | " 0x%02x\n", service_action); |
| 1197 | break; |
| 1198 | } |
| 1199 | break; |
| 1200 | case SYNCHRONIZE_CACHE: |
| 1201 | case 0x91: /* SYNCHRONIZE_CACHE_16: */ |
| 1202 | if (!dev->transport->do_sync_cache) { |
Andy Grover | 6708bb2 | 2011-06-08 10:36:43 -0700 | [diff] [blame] | 1203 | pr_err("SYNCHRONIZE_CACHE emulation not supported" |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 1204 | " for: %s\n", dev->transport->name); |
| 1205 | return PYX_TRANSPORT_UNKNOWN_SAM_OPCODE; |
| 1206 | } |
| 1207 | dev->transport->do_sync_cache(task); |
| 1208 | break; |
| 1209 | case ALLOW_MEDIUM_REMOVAL: |
| 1210 | case ERASE: |
| 1211 | case REZERO_UNIT: |
| 1212 | case SEEK_10: |
| 1213 | case SPACE: |
| 1214 | case START_STOP: |
| 1215 | case TEST_UNIT_READY: |
| 1216 | case VERIFY: |
| 1217 | case WRITE_FILEMARKS: |
| 1218 | break; |
| 1219 | default: |
Andy Grover | 6708bb2 | 2011-06-08 10:36:43 -0700 | [diff] [blame] | 1220 | pr_err("Unsupported SCSI Opcode: 0x%02x for %s\n", |
Andy Grover | a1d8b49 | 2011-05-02 17:12:10 -0700 | [diff] [blame] | 1221 | cmd->t_task_cdb[0], dev->transport->name); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 1222 | return PYX_TRANSPORT_UNKNOWN_SAM_OPCODE; |
| 1223 | } |
| 1224 | |
| 1225 | if (ret < 0) |
| 1226 | return ret; |
| 1227 | task->task_scsi_status = GOOD; |
| 1228 | transport_complete_task(task, 1); |
| 1229 | |
| 1230 | return PYX_TRANSPORT_SENT_TO_TRANSPORT; |
| 1231 | } |