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 | c9abb9b | 2011-10-25 06:43:29 +0000 | [diff] [blame] | 27 | #include <linux/module.h> |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 28 | #include <asm/unaligned.h> |
| 29 | #include <scsi/scsi.h> |
| 30 | |
| 31 | #include <target/target_core_base.h> |
| 32 | #include <target/target_core_transport.h> |
| 33 | #include <target/target_core_fabric_ops.h> |
| 34 | #include "target_core_ua.h" |
Christoph Hellwig | 5bda90c | 2011-11-03 17:50:45 -0400 | [diff] [blame] | 35 | #include "target_core_cdb.h" |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 36 | |
| 37 | static void |
| 38 | target_fill_alua_data(struct se_port *port, unsigned char *buf) |
| 39 | { |
| 40 | struct t10_alua_tg_pt_gp *tg_pt_gp; |
| 41 | struct t10_alua_tg_pt_gp_member *tg_pt_gp_mem; |
| 42 | |
| 43 | /* |
| 44 | * Set SCCS for MAINTENANCE_IN + REPORT_TARGET_PORT_GROUPS. |
| 45 | */ |
| 46 | buf[5] = 0x80; |
| 47 | |
| 48 | /* |
| 49 | * Set TPGS field for explict and/or implict ALUA access type |
| 50 | * and opteration. |
| 51 | * |
| 52 | * See spc4r17 section 6.4.2 Table 135 |
| 53 | */ |
| 54 | if (!port) |
| 55 | return; |
| 56 | tg_pt_gp_mem = port->sep_alua_tg_pt_gp_mem; |
| 57 | if (!tg_pt_gp_mem) |
| 58 | return; |
| 59 | |
| 60 | spin_lock(&tg_pt_gp_mem->tg_pt_gp_mem_lock); |
| 61 | tg_pt_gp = tg_pt_gp_mem->tg_pt_gp; |
| 62 | if (tg_pt_gp) |
| 63 | buf[5] |= tg_pt_gp->tg_pt_gp_alua_access_type; |
| 64 | spin_unlock(&tg_pt_gp_mem->tg_pt_gp_mem_lock); |
| 65 | } |
| 66 | |
| 67 | static int |
| 68 | target_emulate_inquiry_std(struct se_cmd *cmd) |
| 69 | { |
Andy Grover | e3d6f90 | 2011-07-19 08:55:10 +0000 | [diff] [blame] | 70 | struct se_lun *lun = cmd->se_lun; |
Andy Grover | 5951146 | 2011-07-19 10:26:37 +0000 | [diff] [blame] | 71 | struct se_device *dev = cmd->se_dev; |
Nicholas Bellinger | 052605c | 2011-07-26 17:48:43 -0700 | [diff] [blame] | 72 | struct se_portal_group *tpg = lun->lun_sep->sep_tpg; |
Andy Grover | 05d1c7c | 2011-07-20 19:13:28 +0000 | [diff] [blame] | 73 | unsigned char *buf; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 74 | |
| 75 | /* |
| 76 | * Make sure we at least have 6 bytes of INQUIRY response |
| 77 | * payload going back for EVPD=0 |
| 78 | */ |
| 79 | if (cmd->data_length < 6) { |
Andy Grover | 6708bb2 | 2011-06-08 10:36:43 -0700 | [diff] [blame] | 80 | pr_err("SCSI Inquiry payload length: %u" |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 81 | " too small for EVPD=0\n", cmd->data_length); |
Andy Grover | e3d6f90 | 2011-07-19 08:55:10 +0000 | [diff] [blame] | 82 | return -EINVAL; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 83 | } |
| 84 | |
Andy Grover | 05d1c7c | 2011-07-20 19:13:28 +0000 | [diff] [blame] | 85 | buf = transport_kmap_first_data_page(cmd); |
| 86 | |
Nicholas Bellinger | 052605c | 2011-07-26 17:48:43 -0700 | [diff] [blame] | 87 | if (dev == tpg->tpg_virt_lun0.lun_se_dev) { |
| 88 | buf[0] = 0x3f; /* Not connected */ |
| 89 | } else { |
| 90 | buf[0] = dev->transport->get_device_type(dev); |
| 91 | if (buf[0] == TYPE_TAPE) |
| 92 | buf[1] = 0x80; |
| 93 | } |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 94 | buf[2] = dev->transport->get_device_rev(dev); |
| 95 | |
| 96 | /* |
| 97 | * Enable SCCS and TPGS fields for Emulated ALUA |
| 98 | */ |
Andy Grover | e3d6f90 | 2011-07-19 08:55:10 +0000 | [diff] [blame] | 99 | if (dev->se_sub_dev->t10_alua.alua_type == SPC3_ALUA_EMULATED) |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 100 | target_fill_alua_data(lun->lun_sep, buf); |
| 101 | |
| 102 | if (cmd->data_length < 8) { |
| 103 | buf[4] = 1; /* Set additional length to 1 */ |
Andy Grover | 05d1c7c | 2011-07-20 19:13:28 +0000 | [diff] [blame] | 104 | goto out; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 105 | } |
| 106 | |
| 107 | buf[7] = 0x32; /* Sync=1 and CmdQue=1 */ |
| 108 | |
| 109 | /* |
| 110 | * Do not include vendor, product, reversion info in INQUIRY |
| 111 | * response payload for cdbs with a small allocation length. |
| 112 | */ |
| 113 | if (cmd->data_length < 36) { |
| 114 | buf[4] = 3; /* Set additional length to 3 */ |
Andy Grover | 05d1c7c | 2011-07-20 19:13:28 +0000 | [diff] [blame] | 115 | goto out; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 116 | } |
| 117 | |
| 118 | snprintf((unsigned char *)&buf[8], 8, "LIO-ORG"); |
| 119 | snprintf((unsigned char *)&buf[16], 16, "%s", |
Andy Grover | e3d6f90 | 2011-07-19 08:55:10 +0000 | [diff] [blame] | 120 | &dev->se_sub_dev->t10_wwn.model[0]); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 121 | snprintf((unsigned char *)&buf[32], 4, "%s", |
Andy Grover | e3d6f90 | 2011-07-19 08:55:10 +0000 | [diff] [blame] | 122 | &dev->se_sub_dev->t10_wwn.revision[0]); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 123 | buf[4] = 31; /* Set additional length to 31 */ |
Andy Grover | 05d1c7c | 2011-07-20 19:13:28 +0000 | [diff] [blame] | 124 | |
| 125 | out: |
| 126 | transport_kunmap_first_data_page(cmd); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 127 | return 0; |
| 128 | } |
| 129 | |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 130 | /* unit serial number */ |
| 131 | static int |
| 132 | target_emulate_evpd_80(struct se_cmd *cmd, unsigned char *buf) |
| 133 | { |
Andy Grover | 5951146 | 2011-07-19 10:26:37 +0000 | [diff] [blame] | 134 | struct se_device *dev = cmd->se_dev; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 135 | u16 len = 0; |
| 136 | |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 137 | if (dev->se_sub_dev->su_dev_flags & |
| 138 | SDF_EMULATED_VPD_UNIT_SERIAL) { |
| 139 | u32 unit_serial_len; |
| 140 | |
| 141 | unit_serial_len = |
Andy Grover | e3d6f90 | 2011-07-19 08:55:10 +0000 | [diff] [blame] | 142 | strlen(&dev->se_sub_dev->t10_wwn.unit_serial[0]); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 143 | unit_serial_len++; /* For NULL Terminator */ |
| 144 | |
| 145 | if (((len + 4) + unit_serial_len) > cmd->data_length) { |
| 146 | len += unit_serial_len; |
| 147 | buf[2] = ((len >> 8) & 0xff); |
| 148 | buf[3] = (len & 0xff); |
| 149 | return 0; |
| 150 | } |
| 151 | len += sprintf((unsigned char *)&buf[4], "%s", |
Andy Grover | e3d6f90 | 2011-07-19 08:55:10 +0000 | [diff] [blame] | 152 | &dev->se_sub_dev->t10_wwn.unit_serial[0]); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 153 | len++; /* Extra Byte for NULL Terminator */ |
| 154 | buf[3] = len; |
| 155 | } |
| 156 | return 0; |
| 157 | } |
| 158 | |
Nicholas Bellinger | 784eb99 | 2011-09-16 01:31:28 -0700 | [diff] [blame] | 159 | static void |
Andy Shevchenko | b6b4e61 | 2011-09-19 11:11:21 +0300 | [diff] [blame] | 160 | target_parse_naa_6h_vendor_specific(struct se_device *dev, unsigned char *buf) |
Nicholas Bellinger | 784eb99 | 2011-09-16 01:31:28 -0700 | [diff] [blame] | 161 | { |
| 162 | unsigned char *p = &dev->se_sub_dev->t10_wwn.unit_serial[0]; |
Andy Shevchenko | b6b4e61 | 2011-09-19 11:11:21 +0300 | [diff] [blame] | 163 | int cnt; |
| 164 | bool next = true; |
| 165 | |
Nicholas Bellinger | 784eb99 | 2011-09-16 01:31:28 -0700 | [diff] [blame] | 166 | /* |
| 167 | * Generate up to 36 bits of VENDOR SPECIFIC IDENTIFIER starting on |
| 168 | * byte 3 bit 3-0 for NAA IEEE Registered Extended DESIGNATOR field |
| 169 | * format, followed by 64 bits of VENDOR SPECIFIC IDENTIFIER EXTENSION |
| 170 | * to complete the payload. These are based from VPD=0x80 PRODUCT SERIAL |
| 171 | * NUMBER set via vpd_unit_serial in target_core_configfs.c to ensure |
| 172 | * per device uniqeness. |
| 173 | */ |
Andy Shevchenko | b6b4e61 | 2011-09-19 11:11:21 +0300 | [diff] [blame] | 174 | for (cnt = 0; *p && cnt < 13; p++) { |
| 175 | int val = hex_to_bin(*p); |
| 176 | |
| 177 | if (val < 0) |
Nicholas Bellinger | 784eb99 | 2011-09-16 01:31:28 -0700 | [diff] [blame] | 178 | continue; |
Andy Shevchenko | b6b4e61 | 2011-09-19 11:11:21 +0300 | [diff] [blame] | 179 | |
| 180 | if (next) { |
| 181 | next = false; |
| 182 | buf[cnt++] |= val; |
Nicholas Bellinger | 784eb99 | 2011-09-16 01:31:28 -0700 | [diff] [blame] | 183 | } else { |
Andy Shevchenko | b6b4e61 | 2011-09-19 11:11:21 +0300 | [diff] [blame] | 184 | next = true; |
| 185 | buf[cnt] = val << 4; |
Nicholas Bellinger | 784eb99 | 2011-09-16 01:31:28 -0700 | [diff] [blame] | 186 | } |
| 187 | } |
| 188 | } |
| 189 | |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 190 | /* |
| 191 | * Device identification VPD, for a complete list of |
| 192 | * DESIGNATOR TYPEs see spc4r17 Table 459. |
| 193 | */ |
| 194 | static int |
| 195 | target_emulate_evpd_83(struct se_cmd *cmd, unsigned char *buf) |
| 196 | { |
Andy Grover | 5951146 | 2011-07-19 10:26:37 +0000 | [diff] [blame] | 197 | struct se_device *dev = cmd->se_dev; |
Andy Grover | e3d6f90 | 2011-07-19 08:55:10 +0000 | [diff] [blame] | 198 | struct se_lun *lun = cmd->se_lun; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 199 | struct se_port *port = NULL; |
| 200 | struct se_portal_group *tpg = NULL; |
| 201 | struct t10_alua_lu_gp_member *lu_gp_mem; |
| 202 | struct t10_alua_tg_pt_gp *tg_pt_gp; |
| 203 | struct t10_alua_tg_pt_gp_member *tg_pt_gp_mem; |
Andy Grover | e3d6f90 | 2011-07-19 08:55:10 +0000 | [diff] [blame] | 204 | unsigned char *prod = &dev->se_sub_dev->t10_wwn.model[0]; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 205 | u32 prod_len; |
| 206 | u32 unit_serial_len, off = 0; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 207 | u16 len = 0, id_len; |
| 208 | |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 209 | off = 4; |
| 210 | |
| 211 | /* |
| 212 | * NAA IEEE Registered Extended Assigned designator format, see |
| 213 | * spc4r17 section 7.7.3.6.5 |
| 214 | * |
| 215 | * We depend upon a target_core_mod/ConfigFS provided |
| 216 | * /sys/kernel/config/target/core/$HBA/$DEV/wwn/vpd_unit_serial |
| 217 | * value in order to return the NAA id. |
| 218 | */ |
| 219 | if (!(dev->se_sub_dev->su_dev_flags & SDF_EMULATED_VPD_UNIT_SERIAL)) |
| 220 | goto check_t10_vend_desc; |
| 221 | |
| 222 | if (off + 20 > cmd->data_length) |
| 223 | goto check_t10_vend_desc; |
| 224 | |
| 225 | /* CODE SET == Binary */ |
| 226 | buf[off++] = 0x1; |
| 227 | |
Andy Shevchenko | 163cd5f | 2011-07-18 22:17:43 -0700 | [diff] [blame] | 228 | /* Set ASSOCIATION == addressed logical unit: 0)b */ |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 229 | buf[off] = 0x00; |
| 230 | |
| 231 | /* Identifier/Designator type == NAA identifier */ |
Andy Shevchenko | 163cd5f | 2011-07-18 22:17:43 -0700 | [diff] [blame] | 232 | buf[off++] |= 0x3; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 233 | off++; |
| 234 | |
| 235 | /* Identifier/Designator length */ |
| 236 | buf[off++] = 0x10; |
| 237 | |
| 238 | /* |
| 239 | * Start NAA IEEE Registered Extended Identifier/Designator |
| 240 | */ |
| 241 | buf[off++] = (0x6 << 4); |
| 242 | |
| 243 | /* |
| 244 | * Use OpenFabrics IEEE Company ID: 00 14 05 |
| 245 | */ |
| 246 | buf[off++] = 0x01; |
| 247 | buf[off++] = 0x40; |
| 248 | buf[off] = (0x5 << 4); |
| 249 | |
| 250 | /* |
| 251 | * Return ConfigFS Unit Serial Number information for |
| 252 | * VENDOR_SPECIFIC_IDENTIFIER and |
| 253 | * VENDOR_SPECIFIC_IDENTIFIER_EXTENTION |
| 254 | */ |
Nicholas Bellinger | 784eb99 | 2011-09-16 01:31:28 -0700 | [diff] [blame] | 255 | target_parse_naa_6h_vendor_specific(dev, &buf[off]); |
Andy Shevchenko | 11650b85 | 2011-07-18 22:26:40 -0700 | [diff] [blame] | 256 | |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 257 | len = 20; |
| 258 | off = (len + 4); |
| 259 | |
| 260 | check_t10_vend_desc: |
| 261 | /* |
| 262 | * T10 Vendor Identifier Page, see spc4r17 section 7.7.3.4 |
| 263 | */ |
| 264 | id_len = 8; /* For Vendor field */ |
| 265 | prod_len = 4; /* For VPD Header */ |
| 266 | prod_len += 8; /* For Vendor field */ |
| 267 | prod_len += strlen(prod); |
| 268 | prod_len++; /* For : */ |
| 269 | |
| 270 | if (dev->se_sub_dev->su_dev_flags & |
| 271 | SDF_EMULATED_VPD_UNIT_SERIAL) { |
| 272 | unit_serial_len = |
Andy Grover | e3d6f90 | 2011-07-19 08:55:10 +0000 | [diff] [blame] | 273 | strlen(&dev->se_sub_dev->t10_wwn.unit_serial[0]); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 274 | unit_serial_len++; /* For NULL Terminator */ |
| 275 | |
| 276 | if ((len + (id_len + 4) + |
| 277 | (prod_len + unit_serial_len)) > |
| 278 | cmd->data_length) { |
| 279 | len += (prod_len + unit_serial_len); |
| 280 | goto check_port; |
| 281 | } |
| 282 | id_len += sprintf((unsigned char *)&buf[off+12], |
| 283 | "%s:%s", prod, |
Andy Grover | e3d6f90 | 2011-07-19 08:55:10 +0000 | [diff] [blame] | 284 | &dev->se_sub_dev->t10_wwn.unit_serial[0]); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 285 | } |
| 286 | buf[off] = 0x2; /* ASCII */ |
| 287 | buf[off+1] = 0x1; /* T10 Vendor ID */ |
| 288 | buf[off+2] = 0x0; |
| 289 | memcpy((unsigned char *)&buf[off+4], "LIO-ORG", 8); |
| 290 | /* Extra Byte for NULL Terminator */ |
| 291 | id_len++; |
| 292 | /* Identifier Length */ |
| 293 | buf[off+3] = id_len; |
| 294 | /* Header size for Designation descriptor */ |
| 295 | len += (id_len + 4); |
| 296 | off += (id_len + 4); |
| 297 | /* |
| 298 | * struct se_port is only set for INQUIRY VPD=1 through $FABRIC_MOD |
| 299 | */ |
| 300 | check_port: |
| 301 | port = lun->lun_sep; |
| 302 | if (port) { |
| 303 | struct t10_alua_lu_gp *lu_gp; |
| 304 | u32 padding, scsi_name_len; |
| 305 | u16 lu_gp_id = 0; |
| 306 | u16 tg_pt_gp_id = 0; |
| 307 | u16 tpgt; |
| 308 | |
| 309 | tpg = port->sep_tpg; |
| 310 | /* |
| 311 | * Relative target port identifer, see spc4r17 |
| 312 | * section 7.7.3.7 |
| 313 | * |
| 314 | * Get the PROTOCOL IDENTIFIER as defined by spc4r17 |
| 315 | * section 7.5.1 Table 362 |
| 316 | */ |
| 317 | if (((len + 4) + 8) > cmd->data_length) { |
| 318 | len += 8; |
| 319 | goto check_tpgi; |
| 320 | } |
| 321 | buf[off] = |
Andy Grover | e3d6f90 | 2011-07-19 08:55:10 +0000 | [diff] [blame] | 322 | (tpg->se_tpg_tfo->get_fabric_proto_ident(tpg) << 4); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 323 | buf[off++] |= 0x1; /* CODE SET == Binary */ |
| 324 | buf[off] = 0x80; /* Set PIV=1 */ |
Andy Shevchenko | 163cd5f | 2011-07-18 22:17:43 -0700 | [diff] [blame] | 325 | /* Set ASSOCIATION == target port: 01b */ |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 326 | buf[off] |= 0x10; |
| 327 | /* DESIGNATOR TYPE == Relative target port identifer */ |
| 328 | buf[off++] |= 0x4; |
| 329 | off++; /* Skip over Reserved */ |
| 330 | buf[off++] = 4; /* DESIGNATOR LENGTH */ |
| 331 | /* Skip over Obsolete field in RTPI payload |
| 332 | * in Table 472 */ |
| 333 | off += 2; |
| 334 | buf[off++] = ((port->sep_rtpi >> 8) & 0xff); |
| 335 | buf[off++] = (port->sep_rtpi & 0xff); |
| 336 | len += 8; /* Header size + Designation descriptor */ |
| 337 | /* |
| 338 | * Target port group identifier, see spc4r17 |
| 339 | * section 7.7.3.8 |
| 340 | * |
| 341 | * Get the PROTOCOL IDENTIFIER as defined by spc4r17 |
| 342 | * section 7.5.1 Table 362 |
| 343 | */ |
| 344 | check_tpgi: |
Andy Grover | e3d6f90 | 2011-07-19 08:55:10 +0000 | [diff] [blame] | 345 | if (dev->se_sub_dev->t10_alua.alua_type != |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 346 | SPC3_ALUA_EMULATED) |
| 347 | goto check_scsi_name; |
| 348 | |
| 349 | if (((len + 4) + 8) > cmd->data_length) { |
| 350 | len += 8; |
| 351 | goto check_lu_gp; |
| 352 | } |
| 353 | tg_pt_gp_mem = port->sep_alua_tg_pt_gp_mem; |
| 354 | if (!tg_pt_gp_mem) |
| 355 | goto check_lu_gp; |
| 356 | |
| 357 | spin_lock(&tg_pt_gp_mem->tg_pt_gp_mem_lock); |
| 358 | tg_pt_gp = tg_pt_gp_mem->tg_pt_gp; |
Andy Grover | 6708bb2 | 2011-06-08 10:36:43 -0700 | [diff] [blame] | 359 | if (!tg_pt_gp) { |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 360 | spin_unlock(&tg_pt_gp_mem->tg_pt_gp_mem_lock); |
| 361 | goto check_lu_gp; |
| 362 | } |
| 363 | tg_pt_gp_id = tg_pt_gp->tg_pt_gp_id; |
| 364 | spin_unlock(&tg_pt_gp_mem->tg_pt_gp_mem_lock); |
| 365 | |
| 366 | buf[off] = |
Andy Grover | e3d6f90 | 2011-07-19 08:55:10 +0000 | [diff] [blame] | 367 | (tpg->se_tpg_tfo->get_fabric_proto_ident(tpg) << 4); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 368 | buf[off++] |= 0x1; /* CODE SET == Binary */ |
| 369 | buf[off] = 0x80; /* Set PIV=1 */ |
Andy Shevchenko | 163cd5f | 2011-07-18 22:17:43 -0700 | [diff] [blame] | 370 | /* Set ASSOCIATION == target port: 01b */ |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 371 | buf[off] |= 0x10; |
| 372 | /* DESIGNATOR TYPE == Target port group identifier */ |
| 373 | buf[off++] |= 0x5; |
| 374 | off++; /* Skip over Reserved */ |
| 375 | buf[off++] = 4; /* DESIGNATOR LENGTH */ |
| 376 | off += 2; /* Skip over Reserved Field */ |
| 377 | buf[off++] = ((tg_pt_gp_id >> 8) & 0xff); |
| 378 | buf[off++] = (tg_pt_gp_id & 0xff); |
| 379 | len += 8; /* Header size + Designation descriptor */ |
| 380 | /* |
| 381 | * Logical Unit Group identifier, see spc4r17 |
| 382 | * section 7.7.3.8 |
| 383 | */ |
| 384 | check_lu_gp: |
| 385 | if (((len + 4) + 8) > cmd->data_length) { |
| 386 | len += 8; |
| 387 | goto check_scsi_name; |
| 388 | } |
| 389 | lu_gp_mem = dev->dev_alua_lu_gp_mem; |
Andy Grover | 6708bb2 | 2011-06-08 10:36:43 -0700 | [diff] [blame] | 390 | if (!lu_gp_mem) |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 391 | goto check_scsi_name; |
| 392 | |
| 393 | spin_lock(&lu_gp_mem->lu_gp_mem_lock); |
| 394 | lu_gp = lu_gp_mem->lu_gp; |
Andy Grover | 6708bb2 | 2011-06-08 10:36:43 -0700 | [diff] [blame] | 395 | if (!lu_gp) { |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 396 | spin_unlock(&lu_gp_mem->lu_gp_mem_lock); |
| 397 | goto check_scsi_name; |
| 398 | } |
| 399 | lu_gp_id = lu_gp->lu_gp_id; |
| 400 | spin_unlock(&lu_gp_mem->lu_gp_mem_lock); |
| 401 | |
| 402 | buf[off++] |= 0x1; /* CODE SET == Binary */ |
| 403 | /* DESIGNATOR TYPE == Logical Unit Group identifier */ |
| 404 | buf[off++] |= 0x6; |
| 405 | off++; /* Skip over Reserved */ |
| 406 | buf[off++] = 4; /* DESIGNATOR LENGTH */ |
| 407 | off += 2; /* Skip over Reserved Field */ |
| 408 | buf[off++] = ((lu_gp_id >> 8) & 0xff); |
| 409 | buf[off++] = (lu_gp_id & 0xff); |
| 410 | len += 8; /* Header size + Designation descriptor */ |
| 411 | /* |
| 412 | * SCSI name string designator, see spc4r17 |
| 413 | * section 7.7.3.11 |
| 414 | * |
| 415 | * Get the PROTOCOL IDENTIFIER as defined by spc4r17 |
| 416 | * section 7.5.1 Table 362 |
| 417 | */ |
| 418 | check_scsi_name: |
Andy Grover | e3d6f90 | 2011-07-19 08:55:10 +0000 | [diff] [blame] | 419 | scsi_name_len = strlen(tpg->se_tpg_tfo->tpg_get_wwn(tpg)); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 420 | /* UTF-8 ",t,0x<16-bit TPGT>" + NULL Terminator */ |
| 421 | scsi_name_len += 10; |
| 422 | /* Check for 4-byte padding */ |
| 423 | padding = ((-scsi_name_len) & 3); |
| 424 | if (padding != 0) |
| 425 | scsi_name_len += padding; |
| 426 | /* Header size + Designation descriptor */ |
| 427 | scsi_name_len += 4; |
| 428 | |
| 429 | if (((len + 4) + scsi_name_len) > cmd->data_length) { |
| 430 | len += scsi_name_len; |
| 431 | goto set_len; |
| 432 | } |
| 433 | buf[off] = |
Andy Grover | e3d6f90 | 2011-07-19 08:55:10 +0000 | [diff] [blame] | 434 | (tpg->se_tpg_tfo->get_fabric_proto_ident(tpg) << 4); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 435 | buf[off++] |= 0x3; /* CODE SET == UTF-8 */ |
| 436 | buf[off] = 0x80; /* Set PIV=1 */ |
Andy Shevchenko | 163cd5f | 2011-07-18 22:17:43 -0700 | [diff] [blame] | 437 | /* Set ASSOCIATION == target port: 01b */ |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 438 | buf[off] |= 0x10; |
| 439 | /* DESIGNATOR TYPE == SCSI name string */ |
| 440 | buf[off++] |= 0x8; |
| 441 | off += 2; /* Skip over Reserved and length */ |
| 442 | /* |
| 443 | * SCSI name string identifer containing, $FABRIC_MOD |
| 444 | * dependent information. For LIO-Target and iSCSI |
| 445 | * Target Port, this means "<iSCSI name>,t,0x<TPGT> in |
| 446 | * UTF-8 encoding. |
| 447 | */ |
Andy Grover | e3d6f90 | 2011-07-19 08:55:10 +0000 | [diff] [blame] | 448 | tpgt = tpg->se_tpg_tfo->tpg_get_tag(tpg); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 449 | scsi_name_len = sprintf(&buf[off], "%s,t,0x%04x", |
Andy Grover | e3d6f90 | 2011-07-19 08:55:10 +0000 | [diff] [blame] | 450 | tpg->se_tpg_tfo->tpg_get_wwn(tpg), tpgt); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 451 | scsi_name_len += 1 /* Include NULL terminator */; |
| 452 | /* |
| 453 | * The null-terminated, null-padded (see 4.4.2) SCSI |
| 454 | * NAME STRING field contains a UTF-8 format string. |
| 455 | * The number of bytes in the SCSI NAME STRING field |
| 456 | * (i.e., the value in the DESIGNATOR LENGTH field) |
| 457 | * shall be no larger than 256 and shall be a multiple |
| 458 | * of four. |
| 459 | */ |
| 460 | if (padding) |
| 461 | scsi_name_len += padding; |
| 462 | |
| 463 | buf[off-1] = scsi_name_len; |
| 464 | off += scsi_name_len; |
| 465 | /* Header size + Designation descriptor */ |
| 466 | len += (scsi_name_len + 4); |
| 467 | } |
| 468 | set_len: |
| 469 | buf[2] = ((len >> 8) & 0xff); |
| 470 | buf[3] = (len & 0xff); /* Page Length for VPD 0x83 */ |
| 471 | return 0; |
| 472 | } |
| 473 | |
| 474 | /* Extended INQUIRY Data VPD Page */ |
| 475 | static int |
| 476 | target_emulate_evpd_86(struct se_cmd *cmd, unsigned char *buf) |
| 477 | { |
| 478 | if (cmd->data_length < 60) |
| 479 | return 0; |
| 480 | |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 481 | buf[2] = 0x3c; |
| 482 | /* Set HEADSUP, ORDSUP, SIMPSUP */ |
| 483 | buf[5] = 0x07; |
| 484 | |
| 485 | /* If WriteCache emulation is enabled, set V_SUP */ |
Andy Grover | 5951146 | 2011-07-19 10:26:37 +0000 | [diff] [blame] | 486 | 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] | 487 | buf[6] = 0x01; |
| 488 | return 0; |
| 489 | } |
| 490 | |
| 491 | /* Block Limits VPD page */ |
| 492 | static int |
| 493 | target_emulate_evpd_b0(struct se_cmd *cmd, unsigned char *buf) |
| 494 | { |
Andy Grover | 5951146 | 2011-07-19 10:26:37 +0000 | [diff] [blame] | 495 | struct se_device *dev = cmd->se_dev; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 496 | int have_tp = 0; |
| 497 | |
| 498 | /* |
| 499 | * Following sbc3r22 section 6.5.3 Block Limits VPD page, when |
| 500 | * emulate_tpu=1 or emulate_tpws=1 we will be expect a |
| 501 | * different page length for Thin Provisioning. |
| 502 | */ |
Andy Grover | e3d6f90 | 2011-07-19 08:55:10 +0000 | [diff] [blame] | 503 | 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] | 504 | have_tp = 1; |
| 505 | |
| 506 | if (cmd->data_length < (0x10 + 4)) { |
Andy Grover | 6708bb2 | 2011-06-08 10:36:43 -0700 | [diff] [blame] | 507 | pr_debug("Received data_length: %u" |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 508 | " too small for EVPD 0xb0\n", |
| 509 | cmd->data_length); |
Andy Grover | e3d6f90 | 2011-07-19 08:55:10 +0000 | [diff] [blame] | 510 | return -EINVAL; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 511 | } |
| 512 | |
| 513 | if (have_tp && cmd->data_length < (0x3c + 4)) { |
Andy Grover | 6708bb2 | 2011-06-08 10:36:43 -0700 | [diff] [blame] | 514 | pr_debug("Received data_length: %u" |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 515 | " too small for TPE=1 EVPD 0xb0\n", |
| 516 | cmd->data_length); |
| 517 | have_tp = 0; |
| 518 | } |
| 519 | |
| 520 | buf[0] = dev->transport->get_device_type(dev); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 521 | buf[3] = have_tp ? 0x3c : 0x10; |
| 522 | |
Andy Grover | 6708bb2 | 2011-06-08 10:36:43 -0700 | [diff] [blame] | 523 | /* Set WSNZ to 1 */ |
| 524 | buf[4] = 0x01; |
| 525 | |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 526 | /* |
| 527 | * Set OPTIMAL TRANSFER LENGTH GRANULARITY |
| 528 | */ |
| 529 | put_unaligned_be16(1, &buf[6]); |
| 530 | |
| 531 | /* |
| 532 | * Set MAXIMUM TRANSFER LENGTH |
| 533 | */ |
Andy Grover | e3d6f90 | 2011-07-19 08:55:10 +0000 | [diff] [blame] | 534 | 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] | 535 | |
| 536 | /* |
| 537 | * Set OPTIMAL TRANSFER LENGTH |
| 538 | */ |
Andy Grover | e3d6f90 | 2011-07-19 08:55:10 +0000 | [diff] [blame] | 539 | 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] | 540 | |
| 541 | /* |
| 542 | * Exit now if we don't support TP or the initiator sent a too |
| 543 | * short buffer. |
| 544 | */ |
| 545 | if (!have_tp || cmd->data_length < (0x3c + 4)) |
| 546 | return 0; |
| 547 | |
| 548 | /* |
| 549 | * Set MAXIMUM UNMAP LBA COUNT |
| 550 | */ |
Andy Grover | e3d6f90 | 2011-07-19 08:55:10 +0000 | [diff] [blame] | 551 | 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] | 552 | |
| 553 | /* |
| 554 | * Set MAXIMUM UNMAP BLOCK DESCRIPTOR COUNT |
| 555 | */ |
Andy Grover | e3d6f90 | 2011-07-19 08:55:10 +0000 | [diff] [blame] | 556 | 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] | 557 | &buf[24]); |
| 558 | |
| 559 | /* |
| 560 | * Set OPTIMAL UNMAP GRANULARITY |
| 561 | */ |
Andy Grover | e3d6f90 | 2011-07-19 08:55:10 +0000 | [diff] [blame] | 562 | 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] | 563 | |
| 564 | /* |
| 565 | * UNMAP GRANULARITY ALIGNMENT |
| 566 | */ |
Andy Grover | e3d6f90 | 2011-07-19 08:55:10 +0000 | [diff] [blame] | 567 | 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] | 568 | &buf[32]); |
Andy Grover | e3d6f90 | 2011-07-19 08:55:10 +0000 | [diff] [blame] | 569 | if (dev->se_sub_dev->se_dev_attrib.unmap_granularity_alignment != 0) |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 570 | buf[32] |= 0x80; /* Set the UGAVALID bit */ |
| 571 | |
| 572 | return 0; |
| 573 | } |
| 574 | |
Roland Dreier | e22a7f0 | 2011-07-05 13:34:52 -0700 | [diff] [blame] | 575 | /* Block Device Characteristics VPD page */ |
| 576 | static int |
| 577 | target_emulate_evpd_b1(struct se_cmd *cmd, unsigned char *buf) |
| 578 | { |
| 579 | struct se_device *dev = cmd->se_dev; |
| 580 | |
| 581 | buf[0] = dev->transport->get_device_type(dev); |
| 582 | buf[3] = 0x3c; |
| 583 | |
| 584 | if (cmd->data_length >= 5 && |
| 585 | dev->se_sub_dev->se_dev_attrib.is_nonrot) |
| 586 | buf[5] = 1; |
| 587 | |
| 588 | return 0; |
| 589 | } |
| 590 | |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 591 | /* Thin Provisioning VPD */ |
| 592 | static int |
| 593 | target_emulate_evpd_b2(struct se_cmd *cmd, unsigned char *buf) |
| 594 | { |
Andy Grover | 5951146 | 2011-07-19 10:26:37 +0000 | [diff] [blame] | 595 | struct se_device *dev = cmd->se_dev; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 596 | |
| 597 | /* |
| 598 | * From sbc3r22 section 6.5.4 Thin Provisioning VPD page: |
| 599 | * |
| 600 | * The PAGE LENGTH field is defined in SPC-4. If the DP bit is set to |
| 601 | * zero, then the page length shall be set to 0004h. If the DP bit |
| 602 | * is set to one, then the page length shall be set to the value |
| 603 | * defined in table 162. |
| 604 | */ |
| 605 | buf[0] = dev->transport->get_device_type(dev); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 606 | |
| 607 | /* |
| 608 | * Set Hardcoded length mentioned above for DP=0 |
| 609 | */ |
| 610 | put_unaligned_be16(0x0004, &buf[2]); |
| 611 | |
| 612 | /* |
| 613 | * The THRESHOLD EXPONENT field indicates the threshold set size in |
| 614 | * LBAs as a power of 2 (i.e., the threshold set size is equal to |
| 615 | * 2(threshold exponent)). |
| 616 | * |
| 617 | * Note that this is currently set to 0x00 as mkp says it will be |
| 618 | * changing again. We can enable this once it has settled in T10 |
| 619 | * and is actually used by Linux/SCSI ML code. |
| 620 | */ |
| 621 | buf[4] = 0x00; |
| 622 | |
| 623 | /* |
| 624 | * A TPU bit set to one indicates that the device server supports |
| 625 | * the UNMAP command (see 5.25). A TPU bit set to zero indicates |
| 626 | * that the device server does not support the UNMAP command. |
| 627 | */ |
Andy Grover | e3d6f90 | 2011-07-19 08:55:10 +0000 | [diff] [blame] | 628 | if (dev->se_sub_dev->se_dev_attrib.emulate_tpu != 0) |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 629 | buf[5] = 0x80; |
| 630 | |
| 631 | /* |
| 632 | * A TPWS bit set to one indicates that the device server supports |
| 633 | * the use of the WRITE SAME (16) command (see 5.42) to unmap LBAs. |
| 634 | * A TPWS bit set to zero indicates that the device server does not |
| 635 | * support the use of the WRITE SAME (16) command to unmap LBAs. |
| 636 | */ |
Andy Grover | e3d6f90 | 2011-07-19 08:55:10 +0000 | [diff] [blame] | 637 | if (dev->se_sub_dev->se_dev_attrib.emulate_tpws != 0) |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 638 | buf[5] |= 0x40; |
| 639 | |
| 640 | return 0; |
| 641 | } |
| 642 | |
| 643 | static int |
Roland Dreier | b2eb705 | 2011-07-05 13:34:51 -0700 | [diff] [blame] | 644 | target_emulate_evpd_00(struct se_cmd *cmd, unsigned char *buf); |
| 645 | |
| 646 | static struct { |
| 647 | uint8_t page; |
| 648 | int (*emulate)(struct se_cmd *, unsigned char *); |
| 649 | } evpd_handlers[] = { |
| 650 | { .page = 0x00, .emulate = target_emulate_evpd_00 }, |
| 651 | { .page = 0x80, .emulate = target_emulate_evpd_80 }, |
| 652 | { .page = 0x83, .emulate = target_emulate_evpd_83 }, |
| 653 | { .page = 0x86, .emulate = target_emulate_evpd_86 }, |
| 654 | { .page = 0xb0, .emulate = target_emulate_evpd_b0 }, |
Roland Dreier | e22a7f0 | 2011-07-05 13:34:52 -0700 | [diff] [blame] | 655 | { .page = 0xb1, .emulate = target_emulate_evpd_b1 }, |
Roland Dreier | b2eb705 | 2011-07-05 13:34:51 -0700 | [diff] [blame] | 656 | { .page = 0xb2, .emulate = target_emulate_evpd_b2 }, |
| 657 | }; |
| 658 | |
| 659 | /* supported vital product data pages */ |
| 660 | static int |
| 661 | target_emulate_evpd_00(struct se_cmd *cmd, unsigned char *buf) |
| 662 | { |
| 663 | int p; |
| 664 | |
| 665 | if (cmd->data_length < 8) |
| 666 | return 0; |
| 667 | /* |
| 668 | * Only report the INQUIRY EVPD=1 pages after a valid NAA |
| 669 | * Registered Extended LUN WWN has been set via ConfigFS |
| 670 | * during device creation/restart. |
| 671 | */ |
| 672 | if (cmd->se_dev->se_sub_dev->su_dev_flags & |
| 673 | SDF_EMULATED_VPD_UNIT_SERIAL) { |
| 674 | buf[3] = ARRAY_SIZE(evpd_handlers); |
| 675 | for (p = 0; p < min_t(int, ARRAY_SIZE(evpd_handlers), |
| 676 | cmd->data_length - 4); ++p) |
| 677 | buf[p + 4] = evpd_handlers[p].page; |
| 678 | } |
| 679 | |
| 680 | return 0; |
| 681 | } |
| 682 | |
Christoph Hellwig | 5bda90c | 2011-11-03 17:50:45 -0400 | [diff] [blame] | 683 | int target_emulate_inquiry(struct se_task *task) |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 684 | { |
Christoph Hellwig | 6ed5a55 | 2011-11-03 17:50:43 -0400 | [diff] [blame] | 685 | struct se_cmd *cmd = task->task_se_cmd; |
Andy Grover | 5951146 | 2011-07-19 10:26:37 +0000 | [diff] [blame] | 686 | struct se_device *dev = cmd->se_dev; |
Andy Grover | 05d1c7c | 2011-07-20 19:13:28 +0000 | [diff] [blame] | 687 | unsigned char *buf; |
Andy Grover | a1d8b49 | 2011-05-02 17:12:10 -0700 | [diff] [blame] | 688 | unsigned char *cdb = cmd->t_task_cdb; |
Andy Grover | 05d1c7c | 2011-07-20 19:13:28 +0000 | [diff] [blame] | 689 | int p, ret; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 690 | |
Christoph Hellwig | d29a5b6 | 2011-11-03 17:50:44 -0400 | [diff] [blame] | 691 | if (!(cdb[1] & 0x1)) { |
| 692 | ret = target_emulate_inquiry_std(cmd); |
| 693 | goto out; |
| 694 | } |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 695 | |
| 696 | /* |
| 697 | * Make sure we at least have 4 bytes of INQUIRY response |
| 698 | * payload for 0x00 going back for EVPD=1. Note that 0x80 |
| 699 | * and 0x83 will check for enough payload data length and |
| 700 | * jump to set_len: label when there is not enough inquiry EVPD |
| 701 | * payload length left for the next outgoing EVPD metadata |
| 702 | */ |
| 703 | if (cmd->data_length < 4) { |
Andy Grover | 6708bb2 | 2011-06-08 10:36:43 -0700 | [diff] [blame] | 704 | pr_err("SCSI Inquiry payload length: %u" |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 705 | " too small for EVPD=1\n", cmd->data_length); |
Nicholas Bellinger | 03e98c9 | 2011-11-04 02:36:16 -0700 | [diff] [blame^] | 706 | cmd->scsi_sense_reason = TCM_INVALID_CDB_FIELD; |
Andy Grover | e3d6f90 | 2011-07-19 08:55:10 +0000 | [diff] [blame] | 707 | return -EINVAL; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 708 | } |
Andy Grover | 05d1c7c | 2011-07-20 19:13:28 +0000 | [diff] [blame] | 709 | |
| 710 | buf = transport_kmap_first_data_page(cmd); |
| 711 | |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 712 | buf[0] = dev->transport->get_device_type(dev); |
| 713 | |
Christoph Hellwig | d29a5b6 | 2011-11-03 17:50:44 -0400 | [diff] [blame] | 714 | for (p = 0; p < ARRAY_SIZE(evpd_handlers); ++p) { |
Roland Dreier | b2eb705 | 2011-07-05 13:34:51 -0700 | [diff] [blame] | 715 | if (cdb[2] == evpd_handlers[p].page) { |
| 716 | buf[1] = cdb[2]; |
Andy Grover | 05d1c7c | 2011-07-20 19:13:28 +0000 | [diff] [blame] | 717 | ret = evpd_handlers[p].emulate(cmd, buf); |
Christoph Hellwig | d29a5b6 | 2011-11-03 17:50:44 -0400 | [diff] [blame] | 718 | goto out_unmap; |
Roland Dreier | b2eb705 | 2011-07-05 13:34:51 -0700 | [diff] [blame] | 719 | } |
Christoph Hellwig | d29a5b6 | 2011-11-03 17:50:44 -0400 | [diff] [blame] | 720 | } |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 721 | |
Andy Grover | 6708bb2 | 2011-06-08 10:36:43 -0700 | [diff] [blame] | 722 | pr_err("Unknown VPD Code: 0x%02x\n", cdb[2]); |
Nicholas Bellinger | 03e98c9 | 2011-11-04 02:36:16 -0700 | [diff] [blame^] | 723 | cmd->scsi_sense_reason = TCM_UNSUPPORTED_SCSI_OPCODE; |
Christoph Hellwig | d29a5b6 | 2011-11-03 17:50:44 -0400 | [diff] [blame] | 724 | ret = -EINVAL; |
| 725 | |
| 726 | out_unmap: |
| 727 | transport_kunmap_first_data_page(cmd); |
| 728 | out: |
| 729 | if (!ret) { |
| 730 | task->task_scsi_status = GOOD; |
| 731 | transport_complete_task(task, 1); |
| 732 | } |
| 733 | return ret; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 734 | } |
| 735 | |
Christoph Hellwig | 5bda90c | 2011-11-03 17:50:45 -0400 | [diff] [blame] | 736 | int target_emulate_readcapacity(struct se_task *task) |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 737 | { |
Christoph Hellwig | 6ed5a55 | 2011-11-03 17:50:43 -0400 | [diff] [blame] | 738 | struct se_cmd *cmd = task->task_se_cmd; |
Andy Grover | 5951146 | 2011-07-19 10:26:37 +0000 | [diff] [blame] | 739 | struct se_device *dev = cmd->se_dev; |
Andy Grover | 05d1c7c | 2011-07-20 19:13:28 +0000 | [diff] [blame] | 740 | unsigned char *buf; |
Nicholas Bellinger | 904f0bc | 2011-03-02 15:52:51 -0800 | [diff] [blame] | 741 | unsigned long long blocks_long = dev->transport->get_blocks(dev); |
| 742 | u32 blocks; |
| 743 | |
| 744 | if (blocks_long >= 0x00000000ffffffff) |
| 745 | blocks = 0xffffffff; |
| 746 | else |
| 747 | blocks = (u32)blocks_long; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 748 | |
Andy Grover | 05d1c7c | 2011-07-20 19:13:28 +0000 | [diff] [blame] | 749 | buf = transport_kmap_first_data_page(cmd); |
| 750 | |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 751 | buf[0] = (blocks >> 24) & 0xff; |
| 752 | buf[1] = (blocks >> 16) & 0xff; |
| 753 | buf[2] = (blocks >> 8) & 0xff; |
| 754 | buf[3] = blocks & 0xff; |
Andy Grover | e3d6f90 | 2011-07-19 08:55:10 +0000 | [diff] [blame] | 755 | buf[4] = (dev->se_sub_dev->se_dev_attrib.block_size >> 24) & 0xff; |
| 756 | buf[5] = (dev->se_sub_dev->se_dev_attrib.block_size >> 16) & 0xff; |
| 757 | buf[6] = (dev->se_sub_dev->se_dev_attrib.block_size >> 8) & 0xff; |
| 758 | buf[7] = dev->se_sub_dev->se_dev_attrib.block_size & 0xff; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 759 | /* |
| 760 | * Set max 32-bit blocks to signal SERVICE ACTION READ_CAPACITY_16 |
| 761 | */ |
Andy Grover | e3d6f90 | 2011-07-19 08:55:10 +0000 | [diff] [blame] | 762 | 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] | 763 | put_unaligned_be32(0xFFFFFFFF, &buf[0]); |
| 764 | |
Andy Grover | 05d1c7c | 2011-07-20 19:13:28 +0000 | [diff] [blame] | 765 | transport_kunmap_first_data_page(cmd); |
| 766 | |
Christoph Hellwig | d29a5b6 | 2011-11-03 17:50:44 -0400 | [diff] [blame] | 767 | task->task_scsi_status = GOOD; |
| 768 | transport_complete_task(task, 1); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 769 | return 0; |
| 770 | } |
| 771 | |
Christoph Hellwig | 5bda90c | 2011-11-03 17:50:45 -0400 | [diff] [blame] | 772 | int target_emulate_readcapacity_16(struct se_task *task) |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 773 | { |
Christoph Hellwig | 6ed5a55 | 2011-11-03 17:50:43 -0400 | [diff] [blame] | 774 | struct se_cmd *cmd = task->task_se_cmd; |
Andy Grover | 5951146 | 2011-07-19 10:26:37 +0000 | [diff] [blame] | 775 | struct se_device *dev = cmd->se_dev; |
Andy Grover | 05d1c7c | 2011-07-20 19:13:28 +0000 | [diff] [blame] | 776 | unsigned char *buf; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 777 | unsigned long long blocks = dev->transport->get_blocks(dev); |
| 778 | |
Andy Grover | 05d1c7c | 2011-07-20 19:13:28 +0000 | [diff] [blame] | 779 | buf = transport_kmap_first_data_page(cmd); |
| 780 | |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 781 | buf[0] = (blocks >> 56) & 0xff; |
| 782 | buf[1] = (blocks >> 48) & 0xff; |
| 783 | buf[2] = (blocks >> 40) & 0xff; |
| 784 | buf[3] = (blocks >> 32) & 0xff; |
| 785 | buf[4] = (blocks >> 24) & 0xff; |
| 786 | buf[5] = (blocks >> 16) & 0xff; |
| 787 | buf[6] = (blocks >> 8) & 0xff; |
| 788 | buf[7] = blocks & 0xff; |
Andy Grover | e3d6f90 | 2011-07-19 08:55:10 +0000 | [diff] [blame] | 789 | buf[8] = (dev->se_sub_dev->se_dev_attrib.block_size >> 24) & 0xff; |
| 790 | buf[9] = (dev->se_sub_dev->se_dev_attrib.block_size >> 16) & 0xff; |
| 791 | buf[10] = (dev->se_sub_dev->se_dev_attrib.block_size >> 8) & 0xff; |
| 792 | buf[11] = dev->se_sub_dev->se_dev_attrib.block_size & 0xff; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 793 | /* |
| 794 | * Set Thin Provisioning Enable bit following sbc3r22 in section |
| 795 | * READ CAPACITY (16) byte 14 if emulate_tpu or emulate_tpws is enabled. |
| 796 | */ |
Andy Grover | e3d6f90 | 2011-07-19 08:55:10 +0000 | [diff] [blame] | 797 | 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] | 798 | buf[14] = 0x80; |
| 799 | |
Andy Grover | 05d1c7c | 2011-07-20 19:13:28 +0000 | [diff] [blame] | 800 | transport_kunmap_first_data_page(cmd); |
| 801 | |
Christoph Hellwig | d29a5b6 | 2011-11-03 17:50:44 -0400 | [diff] [blame] | 802 | task->task_scsi_status = GOOD; |
| 803 | transport_complete_task(task, 1); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 804 | return 0; |
| 805 | } |
| 806 | |
| 807 | static int |
| 808 | target_modesense_rwrecovery(unsigned char *p) |
| 809 | { |
| 810 | p[0] = 0x01; |
| 811 | p[1] = 0x0a; |
| 812 | |
| 813 | return 12; |
| 814 | } |
| 815 | |
| 816 | static int |
| 817 | target_modesense_control(struct se_device *dev, unsigned char *p) |
| 818 | { |
| 819 | p[0] = 0x0a; |
| 820 | p[1] = 0x0a; |
| 821 | p[2] = 2; |
| 822 | /* |
Nicholas Bellinger | 5de619a | 2011-07-17 02:57:58 -0700 | [diff] [blame] | 823 | * From spc4r23, 7.4.7 Control mode page |
| 824 | * |
| 825 | * The QUEUE ALGORITHM MODIFIER field (see table 368) specifies |
| 826 | * restrictions on the algorithm used for reordering commands |
| 827 | * having the SIMPLE task attribute (see SAM-4). |
| 828 | * |
| 829 | * Table 368 -- QUEUE ALGORITHM MODIFIER field |
| 830 | * Code Description |
| 831 | * 0h Restricted reordering |
| 832 | * 1h Unrestricted reordering allowed |
| 833 | * 2h to 7h Reserved |
| 834 | * 8h to Fh Vendor specific |
| 835 | * |
| 836 | * A value of zero in the QUEUE ALGORITHM MODIFIER field specifies that |
| 837 | * the device server shall order the processing sequence of commands |
| 838 | * having the SIMPLE task attribute such that data integrity is maintained |
| 839 | * for that I_T nexus (i.e., if the transmission of new SCSI transport protocol |
| 840 | * requests is halted at any time, the final value of all data observable |
| 841 | * on the medium shall be the same as if all the commands had been processed |
| 842 | * with the ORDERED task attribute). |
| 843 | * |
| 844 | * A value of one in the QUEUE ALGORITHM MODIFIER field specifies that the |
| 845 | * device server may reorder the processing sequence of commands having the |
| 846 | * SIMPLE task attribute in any manner. Any data integrity exposures related to |
| 847 | * command sequence order shall be explicitly handled by the application client |
| 848 | * through the selection of appropriate ommands and task attributes. |
| 849 | */ |
| 850 | p[3] = (dev->se_sub_dev->se_dev_attrib.emulate_rest_reord == 1) ? 0x00 : 0x10; |
| 851 | /* |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 852 | * From spc4r17, section 7.4.6 Control mode Page |
| 853 | * |
| 854 | * Unit Attention interlocks control (UN_INTLCK_CTRL) to code 00b |
| 855 | * |
| 856 | * 00b: The logical unit shall clear any unit attention condition |
| 857 | * reported in the same I_T_L_Q nexus transaction as a CHECK CONDITION |
| 858 | * status and shall not establish a unit attention condition when a com- |
| 859 | * mand is completed with BUSY, TASK SET FULL, or RESERVATION CONFLICT |
| 860 | * status. |
| 861 | * |
| 862 | * 10b: The logical unit shall not clear any unit attention condition |
| 863 | * reported in the same I_T_L_Q nexus transaction as a CHECK CONDITION |
| 864 | * status and shall not establish a unit attention condition when |
| 865 | * a command is completed with BUSY, TASK SET FULL, or RESERVATION |
| 866 | * CONFLICT status. |
| 867 | * |
| 868 | * 11b a The logical unit shall not clear any unit attention condition |
| 869 | * reported in the same I_T_L_Q nexus transaction as a CHECK CONDITION |
| 870 | * status and shall establish a unit attention condition for the |
| 871 | * initiator port associated with the I_T nexus on which the BUSY, |
| 872 | * TASK SET FULL, or RESERVATION CONFLICT status is being returned. |
| 873 | * Depending on the status, the additional sense code shall be set to |
| 874 | * PREVIOUS BUSY STATUS, PREVIOUS TASK SET FULL STATUS, or PREVIOUS |
| 875 | * RESERVATION CONFLICT STATUS. Until it is cleared by a REQUEST SENSE |
| 876 | * command, a unit attention condition shall be established only once |
| 877 | * for a BUSY, TASK SET FULL, or RESERVATION CONFLICT status regardless |
| 878 | * to the number of commands completed with one of those status codes. |
| 879 | */ |
Andy Grover | e3d6f90 | 2011-07-19 08:55:10 +0000 | [diff] [blame] | 880 | p[4] = (dev->se_sub_dev->se_dev_attrib.emulate_ua_intlck_ctrl == 2) ? 0x30 : |
| 881 | (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] | 882 | /* |
| 883 | * From spc4r17, section 7.4.6 Control mode Page |
| 884 | * |
| 885 | * Task Aborted Status (TAS) bit set to zero. |
| 886 | * |
| 887 | * A task aborted status (TAS) bit set to zero specifies that aborted |
| 888 | * tasks shall be terminated by the device server without any response |
| 889 | * to the application client. A TAS bit set to one specifies that tasks |
| 890 | * aborted by the actions of an I_T nexus other than the I_T nexus on |
| 891 | * which the command was received shall be completed with TASK ABORTED |
| 892 | * status (see SAM-4). |
| 893 | */ |
Andy Grover | e3d6f90 | 2011-07-19 08:55:10 +0000 | [diff] [blame] | 894 | 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] | 895 | p[8] = 0xff; |
| 896 | p[9] = 0xff; |
| 897 | p[11] = 30; |
| 898 | |
| 899 | return 12; |
| 900 | } |
| 901 | |
| 902 | static int |
| 903 | target_modesense_caching(struct se_device *dev, unsigned char *p) |
| 904 | { |
| 905 | p[0] = 0x08; |
| 906 | p[1] = 0x12; |
Andy Grover | e3d6f90 | 2011-07-19 08:55:10 +0000 | [diff] [blame] | 907 | if (dev->se_sub_dev->se_dev_attrib.emulate_write_cache > 0) |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 908 | p[2] = 0x04; /* Write Cache Enable */ |
| 909 | p[12] = 0x20; /* Disabled Read Ahead */ |
| 910 | |
| 911 | return 20; |
| 912 | } |
| 913 | |
| 914 | static void |
| 915 | target_modesense_write_protect(unsigned char *buf, int type) |
| 916 | { |
| 917 | /* |
| 918 | * I believe that the WP bit (bit 7) in the mode header is the same for |
| 919 | * all device types.. |
| 920 | */ |
| 921 | switch (type) { |
| 922 | case TYPE_DISK: |
| 923 | case TYPE_TAPE: |
| 924 | default: |
| 925 | buf[0] |= 0x80; /* WP bit */ |
| 926 | break; |
| 927 | } |
| 928 | } |
| 929 | |
| 930 | static void |
| 931 | target_modesense_dpofua(unsigned char *buf, int type) |
| 932 | { |
| 933 | switch (type) { |
| 934 | case TYPE_DISK: |
| 935 | buf[0] |= 0x10; /* DPOFUA bit */ |
| 936 | break; |
| 937 | default: |
| 938 | break; |
| 939 | } |
| 940 | } |
| 941 | |
Christoph Hellwig | 5bda90c | 2011-11-03 17:50:45 -0400 | [diff] [blame] | 942 | int target_emulate_modesense(struct se_task *task) |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 943 | { |
Christoph Hellwig | 6ed5a55 | 2011-11-03 17:50:43 -0400 | [diff] [blame] | 944 | struct se_cmd *cmd = task->task_se_cmd; |
Andy Grover | 5951146 | 2011-07-19 10:26:37 +0000 | [diff] [blame] | 945 | struct se_device *dev = cmd->se_dev; |
Andy Grover | a1d8b49 | 2011-05-02 17:12:10 -0700 | [diff] [blame] | 946 | char *cdb = cmd->t_task_cdb; |
Andy Grover | 05d1c7c | 2011-07-20 19:13:28 +0000 | [diff] [blame] | 947 | unsigned char *rbuf; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 948 | int type = dev->transport->get_device_type(dev); |
Christoph Hellwig | 6ed5a55 | 2011-11-03 17:50:43 -0400 | [diff] [blame] | 949 | int ten = (cmd->t_task_cdb[0] == MODE_SENSE_10); |
| 950 | int offset = ten ? 8 : 4; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 951 | int length = 0; |
| 952 | unsigned char buf[SE_MODE_PAGE_BUF]; |
| 953 | |
| 954 | memset(buf, 0, SE_MODE_PAGE_BUF); |
| 955 | |
| 956 | switch (cdb[2] & 0x3f) { |
| 957 | case 0x01: |
| 958 | length = target_modesense_rwrecovery(&buf[offset]); |
| 959 | break; |
| 960 | case 0x08: |
| 961 | length = target_modesense_caching(dev, &buf[offset]); |
| 962 | break; |
| 963 | case 0x0a: |
| 964 | length = target_modesense_control(dev, &buf[offset]); |
| 965 | break; |
| 966 | case 0x3f: |
| 967 | length = target_modesense_rwrecovery(&buf[offset]); |
| 968 | length += target_modesense_caching(dev, &buf[offset+length]); |
| 969 | length += target_modesense_control(dev, &buf[offset+length]); |
| 970 | break; |
| 971 | default: |
Roland Dreier | f15ea57 | 2011-08-12 10:01:24 -0700 | [diff] [blame] | 972 | pr_err("MODE SENSE: unimplemented page/subpage: 0x%02x/0x%02x\n", |
| 973 | cdb[2] & 0x3f, cdb[3]); |
Nicholas Bellinger | 03e98c9 | 2011-11-04 02:36:16 -0700 | [diff] [blame^] | 974 | cmd->scsi_sense_reason = TCM_UNKNOWN_MODE_PAGE; |
| 975 | return -EINVAL; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 976 | } |
| 977 | offset += length; |
| 978 | |
| 979 | if (ten) { |
| 980 | offset -= 2; |
| 981 | buf[0] = (offset >> 8) & 0xff; |
| 982 | buf[1] = offset & 0xff; |
| 983 | |
Andy Grover | e3d6f90 | 2011-07-19 08:55:10 +0000 | [diff] [blame] | 984 | if ((cmd->se_lun->lun_access & TRANSPORT_LUNFLAGS_READ_ONLY) || |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 985 | (cmd->se_deve && |
| 986 | (cmd->se_deve->lun_flags & TRANSPORT_LUNFLAGS_READ_ONLY))) |
| 987 | target_modesense_write_protect(&buf[3], type); |
| 988 | |
Andy Grover | e3d6f90 | 2011-07-19 08:55:10 +0000 | [diff] [blame] | 989 | if ((dev->se_sub_dev->se_dev_attrib.emulate_write_cache > 0) && |
| 990 | (dev->se_sub_dev->se_dev_attrib.emulate_fua_write > 0)) |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 991 | target_modesense_dpofua(&buf[3], type); |
| 992 | |
| 993 | if ((offset + 2) > cmd->data_length) |
| 994 | offset = cmd->data_length; |
| 995 | |
| 996 | } else { |
| 997 | offset -= 1; |
| 998 | buf[0] = offset & 0xff; |
| 999 | |
Andy Grover | e3d6f90 | 2011-07-19 08:55:10 +0000 | [diff] [blame] | 1000 | if ((cmd->se_lun->lun_access & TRANSPORT_LUNFLAGS_READ_ONLY) || |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 1001 | (cmd->se_deve && |
| 1002 | (cmd->se_deve->lun_flags & TRANSPORT_LUNFLAGS_READ_ONLY))) |
| 1003 | target_modesense_write_protect(&buf[2], type); |
| 1004 | |
Andy Grover | e3d6f90 | 2011-07-19 08:55:10 +0000 | [diff] [blame] | 1005 | if ((dev->se_sub_dev->se_dev_attrib.emulate_write_cache > 0) && |
| 1006 | (dev->se_sub_dev->se_dev_attrib.emulate_fua_write > 0)) |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 1007 | target_modesense_dpofua(&buf[2], type); |
| 1008 | |
| 1009 | if ((offset + 1) > cmd->data_length) |
| 1010 | offset = cmd->data_length; |
| 1011 | } |
Andy Grover | 05d1c7c | 2011-07-20 19:13:28 +0000 | [diff] [blame] | 1012 | |
| 1013 | rbuf = transport_kmap_first_data_page(cmd); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 1014 | memcpy(rbuf, buf, offset); |
Andy Grover | 05d1c7c | 2011-07-20 19:13:28 +0000 | [diff] [blame] | 1015 | transport_kunmap_first_data_page(cmd); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 1016 | |
Christoph Hellwig | d29a5b6 | 2011-11-03 17:50:44 -0400 | [diff] [blame] | 1017 | task->task_scsi_status = GOOD; |
| 1018 | transport_complete_task(task, 1); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 1019 | return 0; |
| 1020 | } |
| 1021 | |
Christoph Hellwig | 5bda90c | 2011-11-03 17:50:45 -0400 | [diff] [blame] | 1022 | int target_emulate_request_sense(struct se_task *task) |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 1023 | { |
Christoph Hellwig | 6ed5a55 | 2011-11-03 17:50:43 -0400 | [diff] [blame] | 1024 | struct se_cmd *cmd = task->task_se_cmd; |
Andy Grover | a1d8b49 | 2011-05-02 17:12:10 -0700 | [diff] [blame] | 1025 | unsigned char *cdb = cmd->t_task_cdb; |
Andy Grover | 05d1c7c | 2011-07-20 19:13:28 +0000 | [diff] [blame] | 1026 | unsigned char *buf; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 1027 | u8 ua_asc = 0, ua_ascq = 0; |
Andy Grover | 05d1c7c | 2011-07-20 19:13:28 +0000 | [diff] [blame] | 1028 | int err = 0; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 1029 | |
| 1030 | if (cdb[1] & 0x01) { |
Andy Grover | 6708bb2 | 2011-06-08 10:36:43 -0700 | [diff] [blame] | 1031 | pr_err("REQUEST_SENSE description emulation not" |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 1032 | " supported\n"); |
Nicholas Bellinger | 03e98c9 | 2011-11-04 02:36:16 -0700 | [diff] [blame^] | 1033 | cmd->scsi_sense_reason = TCM_INVALID_CDB_FIELD; |
| 1034 | return -ENOSYS; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 1035 | } |
Andy Grover | 05d1c7c | 2011-07-20 19:13:28 +0000 | [diff] [blame] | 1036 | |
| 1037 | buf = transport_kmap_first_data_page(cmd); |
| 1038 | |
Andy Grover | 6708bb2 | 2011-06-08 10:36:43 -0700 | [diff] [blame] | 1039 | 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] | 1040 | /* |
| 1041 | * CURRENT ERROR, UNIT ATTENTION |
| 1042 | */ |
| 1043 | buf[0] = 0x70; |
| 1044 | buf[SPC_SENSE_KEY_OFFSET] = UNIT_ATTENTION; |
| 1045 | /* |
| 1046 | * Make sure request data length is enough for additional |
| 1047 | * sense data. |
| 1048 | */ |
| 1049 | if (cmd->data_length <= 18) { |
| 1050 | buf[7] = 0x00; |
Andy Grover | 05d1c7c | 2011-07-20 19:13:28 +0000 | [diff] [blame] | 1051 | err = -EINVAL; |
| 1052 | goto end; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 1053 | } |
| 1054 | /* |
| 1055 | * The Additional Sense Code (ASC) from the UNIT ATTENTION |
| 1056 | */ |
| 1057 | buf[SPC_ASC_KEY_OFFSET] = ua_asc; |
| 1058 | buf[SPC_ASCQ_KEY_OFFSET] = ua_ascq; |
| 1059 | buf[7] = 0x0A; |
| 1060 | } else { |
| 1061 | /* |
| 1062 | * CURRENT ERROR, NO SENSE |
| 1063 | */ |
| 1064 | buf[0] = 0x70; |
| 1065 | buf[SPC_SENSE_KEY_OFFSET] = NO_SENSE; |
| 1066 | /* |
| 1067 | * Make sure request data length is enough for additional |
| 1068 | * sense data. |
| 1069 | */ |
| 1070 | if (cmd->data_length <= 18) { |
| 1071 | buf[7] = 0x00; |
Andy Grover | 05d1c7c | 2011-07-20 19:13:28 +0000 | [diff] [blame] | 1072 | err = -EINVAL; |
| 1073 | goto end; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 1074 | } |
| 1075 | /* |
| 1076 | * NO ADDITIONAL SENSE INFORMATION |
| 1077 | */ |
| 1078 | buf[SPC_ASC_KEY_OFFSET] = 0x00; |
| 1079 | buf[7] = 0x0A; |
| 1080 | } |
| 1081 | |
Andy Grover | 05d1c7c | 2011-07-20 19:13:28 +0000 | [diff] [blame] | 1082 | end: |
| 1083 | transport_kunmap_first_data_page(cmd); |
Christoph Hellwig | d29a5b6 | 2011-11-03 17:50:44 -0400 | [diff] [blame] | 1084 | task->task_scsi_status = GOOD; |
| 1085 | transport_complete_task(task, 1); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 1086 | return 0; |
| 1087 | } |
| 1088 | |
| 1089 | /* |
| 1090 | * Used for TCM/IBLOCK and TCM/FILEIO for block/blk-lib.c level discard support. |
| 1091 | * Note this is not used for TCM/pSCSI passthrough |
| 1092 | */ |
Christoph Hellwig | 5bda90c | 2011-11-03 17:50:45 -0400 | [diff] [blame] | 1093 | int target_emulate_unmap(struct se_task *task) |
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 | 05d1c7c | 2011-07-20 19:13:28 +0000 | [diff] [blame] | 1097 | unsigned char *buf, *ptr = NULL; |
Andy Grover | a1d8b49 | 2011-05-02 17:12:10 -0700 | [diff] [blame] | 1098 | unsigned char *cdb = &cmd->t_task_cdb[0]; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 1099 | sector_t lba; |
| 1100 | unsigned int size = cmd->data_length, range; |
Andy Grover | 05d1c7c | 2011-07-20 19:13:28 +0000 | [diff] [blame] | 1101 | int ret = 0, offset; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 1102 | unsigned short dl, bd_dl; |
| 1103 | |
Christoph Hellwig | 6ed5a55 | 2011-11-03 17:50:43 -0400 | [diff] [blame] | 1104 | if (!dev->transport->do_discard) { |
| 1105 | pr_err("UNMAP emulation not supported for: %s\n", |
| 1106 | dev->transport->name); |
Nicholas Bellinger | 03e98c9 | 2011-11-04 02:36:16 -0700 | [diff] [blame^] | 1107 | cmd->scsi_sense_reason = TCM_UNSUPPORTED_SCSI_OPCODE; |
| 1108 | return -ENOSYS; |
Christoph Hellwig | 6ed5a55 | 2011-11-03 17:50:43 -0400 | [diff] [blame] | 1109 | } |
| 1110 | |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 1111 | /* First UNMAP block descriptor starts at 8 byte offset */ |
| 1112 | offset = 8; |
| 1113 | size -= 8; |
| 1114 | dl = get_unaligned_be16(&cdb[0]); |
| 1115 | bd_dl = get_unaligned_be16(&cdb[2]); |
Andy Grover | 05d1c7c | 2011-07-20 19:13:28 +0000 | [diff] [blame] | 1116 | |
| 1117 | buf = transport_kmap_first_data_page(cmd); |
| 1118 | |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 1119 | ptr = &buf[offset]; |
Andy Grover | 6708bb2 | 2011-06-08 10:36:43 -0700 | [diff] [blame] | 1120 | 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] | 1121 | " ptr: %p\n", dev->transport->name, dl, bd_dl, size, ptr); |
| 1122 | |
| 1123 | while (size) { |
| 1124 | lba = get_unaligned_be64(&ptr[0]); |
| 1125 | range = get_unaligned_be32(&ptr[8]); |
Andy Grover | 6708bb2 | 2011-06-08 10:36:43 -0700 | [diff] [blame] | 1126 | pr_debug("UNMAP: Using lba: %llu and range: %u\n", |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 1127 | (unsigned long long)lba, range); |
| 1128 | |
| 1129 | ret = dev->transport->do_discard(dev, lba, range); |
| 1130 | if (ret < 0) { |
Andy Grover | 6708bb2 | 2011-06-08 10:36:43 -0700 | [diff] [blame] | 1131 | pr_err("blkdev_issue_discard() failed: %d\n", |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 1132 | ret); |
Andy Grover | 05d1c7c | 2011-07-20 19:13:28 +0000 | [diff] [blame] | 1133 | goto err; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 1134 | } |
| 1135 | |
| 1136 | ptr += 16; |
| 1137 | size -= 16; |
| 1138 | } |
| 1139 | |
Andy Grover | 05d1c7c | 2011-07-20 19:13:28 +0000 | [diff] [blame] | 1140 | err: |
| 1141 | transport_kunmap_first_data_page(cmd); |
Christoph Hellwig | d29a5b6 | 2011-11-03 17:50:44 -0400 | [diff] [blame] | 1142 | if (!ret) { |
| 1143 | task->task_scsi_status = GOOD; |
| 1144 | transport_complete_task(task, 1); |
| 1145 | } |
Andy Grover | 05d1c7c | 2011-07-20 19:13:28 +0000 | [diff] [blame] | 1146 | return ret; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 1147 | } |
| 1148 | |
| 1149 | /* |
| 1150 | * Used for TCM/IBLOCK and TCM/FILEIO for block/blk-lib.c level discard support. |
| 1151 | * Note this is not used for TCM/pSCSI passthrough |
| 1152 | */ |
Christoph Hellwig | 5bda90c | 2011-11-03 17:50:45 -0400 | [diff] [blame] | 1153 | int target_emulate_write_same(struct se_task *task) |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 1154 | { |
Andy Grover | e3d6f90 | 2011-07-19 08:55:10 +0000 | [diff] [blame] | 1155 | struct se_cmd *cmd = task->task_se_cmd; |
Andy Grover | 5951146 | 2011-07-19 10:26:37 +0000 | [diff] [blame] | 1156 | struct se_device *dev = cmd->se_dev; |
Andy Grover | a1d8b49 | 2011-05-02 17:12:10 -0700 | [diff] [blame] | 1157 | sector_t range; |
| 1158 | sector_t lba = cmd->t_task_lba; |
Christoph Hellwig | 6ed5a55 | 2011-11-03 17:50:43 -0400 | [diff] [blame] | 1159 | u32 num_blocks; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 1160 | int ret; |
Christoph Hellwig | 6ed5a55 | 2011-11-03 17:50:43 -0400 | [diff] [blame] | 1161 | |
| 1162 | if (!dev->transport->do_discard) { |
| 1163 | pr_err("WRITE_SAME emulation not supported" |
| 1164 | " for: %s\n", dev->transport->name); |
Nicholas Bellinger | 03e98c9 | 2011-11-04 02:36:16 -0700 | [diff] [blame^] | 1165 | cmd->scsi_sense_reason = TCM_UNSUPPORTED_SCSI_OPCODE; |
| 1166 | return -ENOSYS; |
Christoph Hellwig | 6ed5a55 | 2011-11-03 17:50:43 -0400 | [diff] [blame] | 1167 | } |
| 1168 | |
| 1169 | if (cmd->t_task_cdb[0] == WRITE_SAME) |
| 1170 | num_blocks = get_unaligned_be16(&cmd->t_task_cdb[7]); |
| 1171 | else if (cmd->t_task_cdb[0] == WRITE_SAME_16) |
| 1172 | num_blocks = get_unaligned_be32(&cmd->t_task_cdb[10]); |
| 1173 | else /* WRITE_SAME_32 via VARIABLE_LENGTH_CMD */ |
| 1174 | num_blocks = get_unaligned_be32(&cmd->t_task_cdb[28]); |
| 1175 | |
Nicholas Bellinger | dd3a5ad | 2011-05-06 17:55:35 -0700 | [diff] [blame] | 1176 | /* |
Nicholas Bellinger | 706d586 | 2011-07-28 00:07:03 -0700 | [diff] [blame] | 1177 | * Use the explicit range when non zero is supplied, otherwise calculate |
| 1178 | * the remaining range based on ->get_blocks() - starting LBA. |
Nicholas Bellinger | dd3a5ad | 2011-05-06 17:55:35 -0700 | [diff] [blame] | 1179 | */ |
Nicholas Bellinger | dd3a5ad | 2011-05-06 17:55:35 -0700 | [diff] [blame] | 1180 | if (num_blocks != 0) |
| 1181 | range = num_blocks; |
| 1182 | else |
| 1183 | range = (dev->transport->get_blocks(dev) - lba); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 1184 | |
Andy Grover | 6708bb2 | 2011-06-08 10:36:43 -0700 | [diff] [blame] | 1185 | pr_debug("WRITE_SAME UNMAP: LBA: %llu Range: %llu\n", |
Nicholas Bellinger | dd3a5ad | 2011-05-06 17:55:35 -0700 | [diff] [blame] | 1186 | (unsigned long long)lba, (unsigned long long)range); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 1187 | |
| 1188 | ret = dev->transport->do_discard(dev, lba, range); |
| 1189 | if (ret < 0) { |
Andy Grover | 6708bb2 | 2011-06-08 10:36:43 -0700 | [diff] [blame] | 1190 | pr_debug("blkdev_issue_discard() failed for WRITE_SAME\n"); |
Andy Grover | e3d6f90 | 2011-07-19 08:55:10 +0000 | [diff] [blame] | 1191 | return ret; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 1192 | } |
| 1193 | |
Christoph Hellwig | d29a5b6 | 2011-11-03 17:50:44 -0400 | [diff] [blame] | 1194 | task->task_scsi_status = GOOD; |
| 1195 | transport_complete_task(task, 1); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 1196 | return 0; |
| 1197 | } |
| 1198 | |
Christoph Hellwig | 5bda90c | 2011-11-03 17:50:45 -0400 | [diff] [blame] | 1199 | int target_emulate_synchronize_cache(struct se_task *task) |
Christoph Hellwig | 6ed5a55 | 2011-11-03 17:50:43 -0400 | [diff] [blame] | 1200 | { |
| 1201 | struct se_device *dev = task->task_se_cmd->se_dev; |
Nicholas Bellinger | 03e98c9 | 2011-11-04 02:36:16 -0700 | [diff] [blame^] | 1202 | struct se_cmd *cmd = task->task_se_cmd; |
Christoph Hellwig | 6ed5a55 | 2011-11-03 17:50:43 -0400 | [diff] [blame] | 1203 | |
| 1204 | if (!dev->transport->do_sync_cache) { |
| 1205 | pr_err("SYNCHRONIZE_CACHE emulation not supported" |
| 1206 | " for: %s\n", dev->transport->name); |
Nicholas Bellinger | 03e98c9 | 2011-11-04 02:36:16 -0700 | [diff] [blame^] | 1207 | cmd->scsi_sense_reason = TCM_UNSUPPORTED_SCSI_OPCODE; |
| 1208 | return -ENOSYS; |
Christoph Hellwig | 6ed5a55 | 2011-11-03 17:50:43 -0400 | [diff] [blame] | 1209 | } |
| 1210 | |
| 1211 | dev->transport->do_sync_cache(task); |
| 1212 | return 0; |
| 1213 | } |
| 1214 | |
Christoph Hellwig | 5bda90c | 2011-11-03 17:50:45 -0400 | [diff] [blame] | 1215 | int target_emulate_noop(struct se_task *task) |
Christoph Hellwig | d29a5b6 | 2011-11-03 17:50:44 -0400 | [diff] [blame] | 1216 | { |
| 1217 | task->task_scsi_status = GOOD; |
| 1218 | transport_complete_task(task, 1); |
| 1219 | return 0; |
| 1220 | } |
| 1221 | |
Christoph Hellwig | 485fd0d | 2011-10-12 11:09:12 -0400 | [diff] [blame] | 1222 | /* |
| 1223 | * Write a CDB into @cdb that is based on the one the intiator sent us, |
| 1224 | * but updated to only cover the sectors that the current task handles. |
| 1225 | */ |
| 1226 | void target_get_task_cdb(struct se_task *task, unsigned char *cdb) |
| 1227 | { |
| 1228 | struct se_cmd *cmd = task->task_se_cmd; |
Christoph Hellwig | b937d27 | 2011-10-12 11:09:13 -0400 | [diff] [blame] | 1229 | unsigned int cdb_len = scsi_command_size(cmd->t_task_cdb); |
Christoph Hellwig | 485fd0d | 2011-10-12 11:09:12 -0400 | [diff] [blame] | 1230 | |
Christoph Hellwig | b937d27 | 2011-10-12 11:09:13 -0400 | [diff] [blame] | 1231 | memcpy(cdb, cmd->t_task_cdb, cdb_len); |
Christoph Hellwig | 485fd0d | 2011-10-12 11:09:12 -0400 | [diff] [blame] | 1232 | if (cmd->se_cmd_flags & SCF_SCSI_DATA_SG_IO_CDB) { |
Christoph Hellwig | b937d27 | 2011-10-12 11:09:13 -0400 | [diff] [blame] | 1233 | unsigned long long lba = task->task_lba; |
| 1234 | u32 sectors = task->task_sectors; |
| 1235 | |
| 1236 | switch (cdb_len) { |
| 1237 | case 6: |
| 1238 | /* 21-bit LBA and 8-bit sectors */ |
| 1239 | cdb[1] = (lba >> 16) & 0x1f; |
| 1240 | cdb[2] = (lba >> 8) & 0xff; |
| 1241 | cdb[3] = lba & 0xff; |
| 1242 | cdb[4] = sectors & 0xff; |
| 1243 | break; |
| 1244 | case 10: |
| 1245 | /* 32-bit LBA and 16-bit sectors */ |
| 1246 | put_unaligned_be32(lba, &cdb[2]); |
| 1247 | put_unaligned_be16(sectors, &cdb[7]); |
| 1248 | break; |
| 1249 | case 12: |
| 1250 | /* 32-bit LBA and 32-bit sectors */ |
| 1251 | put_unaligned_be32(lba, &cdb[2]); |
| 1252 | put_unaligned_be32(sectors, &cdb[6]); |
| 1253 | break; |
| 1254 | case 16: |
| 1255 | /* 64-bit LBA and 32-bit sectors */ |
| 1256 | put_unaligned_be64(lba, &cdb[2]); |
| 1257 | put_unaligned_be32(sectors, &cdb[10]); |
| 1258 | break; |
| 1259 | case 32: |
| 1260 | /* 64-bit LBA and 32-bit sectors, extended CDB */ |
| 1261 | put_unaligned_be64(lba, &cdb[12]); |
| 1262 | put_unaligned_be32(sectors, &cdb[28]); |
| 1263 | break; |
| 1264 | default: |
| 1265 | BUG(); |
| 1266 | } |
Christoph Hellwig | 485fd0d | 2011-10-12 11:09:12 -0400 | [diff] [blame] | 1267 | } |
| 1268 | } |
| 1269 | EXPORT_SYMBOL(target_get_task_cdb); |