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> |
Christoph Hellwig | c4795fb | 2011-11-16 09:46:48 -0500 | [diff] [blame] | 32 | #include <target/target_core_backend.h> |
| 33 | #include <target/target_core_fabric.h> |
Christoph Hellwig | e26d99a | 2011-11-14 12:30:30 -0500 | [diff] [blame] | 34 | |
| 35 | #include "target_core_internal.h" |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 36 | #include "target_core_ua.h" |
| 37 | |
| 38 | static void |
| 39 | target_fill_alua_data(struct se_port *port, unsigned char *buf) |
| 40 | { |
| 41 | struct t10_alua_tg_pt_gp *tg_pt_gp; |
| 42 | struct t10_alua_tg_pt_gp_member *tg_pt_gp_mem; |
| 43 | |
| 44 | /* |
| 45 | * Set SCCS for MAINTENANCE_IN + REPORT_TARGET_PORT_GROUPS. |
| 46 | */ |
| 47 | buf[5] = 0x80; |
| 48 | |
| 49 | /* |
| 50 | * Set TPGS field for explict and/or implict ALUA access type |
| 51 | * and opteration. |
| 52 | * |
| 53 | * See spc4r17 section 6.4.2 Table 135 |
| 54 | */ |
| 55 | if (!port) |
| 56 | return; |
| 57 | tg_pt_gp_mem = port->sep_alua_tg_pt_gp_mem; |
| 58 | if (!tg_pt_gp_mem) |
| 59 | return; |
| 60 | |
| 61 | spin_lock(&tg_pt_gp_mem->tg_pt_gp_mem_lock); |
| 62 | tg_pt_gp = tg_pt_gp_mem->tg_pt_gp; |
| 63 | if (tg_pt_gp) |
| 64 | buf[5] |= tg_pt_gp->tg_pt_gp_alua_access_type; |
| 65 | spin_unlock(&tg_pt_gp_mem->tg_pt_gp_mem_lock); |
| 66 | } |
| 67 | |
| 68 | static int |
Roland Dreier | d95b824 | 2012-02-13 16:18:14 -0800 | [diff] [blame] | 69 | target_emulate_inquiry_std(struct se_cmd *cmd, char *buf) |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 70 | { |
Andy Grover | e3d6f90 | 2011-07-19 08:55:10 +0000 | [diff] [blame] | 71 | struct se_lun *lun = cmd->se_lun; |
Andy Grover | 5951146d | 2011-07-19 10:26:37 +0000 | [diff] [blame] | 72 | struct se_device *dev = cmd->se_dev; |
Andy Grover | 05d1c7c | 2011-07-20 19:13:28 +0000 | [diff] [blame] | 73 | |
Roland Dreier | 089461d | 2012-02-13 16:18:15 -0800 | [diff] [blame] | 74 | /* Set RMB (removable media) for tape devices */ |
| 75 | if (dev->transport->get_device_type(dev) == TYPE_TAPE) |
| 76 | buf[1] = 0x80; |
| 77 | |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 78 | buf[2] = dev->transport->get_device_rev(dev); |
| 79 | |
| 80 | /* |
Roland Dreier | ce13617 | 2011-12-06 10:02:09 -0800 | [diff] [blame] | 81 | * NORMACA and HISUP = 0, RESPONSE DATA FORMAT = 2 |
| 82 | * |
| 83 | * SPC4 says: |
| 84 | * A RESPONSE DATA FORMAT field set to 2h indicates that the |
| 85 | * standard INQUIRY data is in the format defined in this |
| 86 | * standard. Response data format values less than 2h are |
| 87 | * obsolete. Response data format values greater than 2h are |
| 88 | * reserved. |
| 89 | */ |
| 90 | buf[3] = 2; |
| 91 | |
| 92 | /* |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 93 | * Enable SCCS and TPGS fields for Emulated ALUA |
| 94 | */ |
Andy Grover | e3d6f90 | 2011-07-19 08:55:10 +0000 | [diff] [blame] | 95 | if (dev->se_sub_dev->t10_alua.alua_type == SPC3_ALUA_EMULATED) |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 96 | target_fill_alua_data(lun->lun_sep, buf); |
| 97 | |
Roland Dreier | effc6cc | 2012-02-13 16:18:16 -0800 | [diff] [blame] | 98 | buf[7] = 0x2; /* CmdQue=1 */ |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 99 | |
Jörn Engel | 8359cf4 | 2011-11-24 02:05:51 +0100 | [diff] [blame] | 100 | snprintf(&buf[8], 8, "LIO-ORG"); |
| 101 | snprintf(&buf[16], 16, "%s", dev->se_sub_dev->t10_wwn.model); |
| 102 | snprintf(&buf[32], 4, "%s", dev->se_sub_dev->t10_wwn.revision); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 103 | buf[4] = 31; /* Set additional length to 31 */ |
Andy Grover | 05d1c7c | 2011-07-20 19:13:28 +0000 | [diff] [blame] | 104 | |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 105 | return 0; |
| 106 | } |
| 107 | |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 108 | /* unit serial number */ |
| 109 | static int |
| 110 | target_emulate_evpd_80(struct se_cmd *cmd, unsigned char *buf) |
| 111 | { |
Andy Grover | 5951146d | 2011-07-19 10:26:37 +0000 | [diff] [blame] | 112 | struct se_device *dev = cmd->se_dev; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 113 | u16 len = 0; |
| 114 | |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 115 | if (dev->se_sub_dev->su_dev_flags & |
| 116 | SDF_EMULATED_VPD_UNIT_SERIAL) { |
| 117 | u32 unit_serial_len; |
| 118 | |
Jörn Engel | 8359cf4 | 2011-11-24 02:05:51 +0100 | [diff] [blame] | 119 | unit_serial_len = strlen(dev->se_sub_dev->t10_wwn.unit_serial); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 120 | unit_serial_len++; /* For NULL Terminator */ |
| 121 | |
Jörn Engel | 8359cf4 | 2011-11-24 02:05:51 +0100 | [diff] [blame] | 122 | len += sprintf(&buf[4], "%s", |
| 123 | dev->se_sub_dev->t10_wwn.unit_serial); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 124 | len++; /* Extra Byte for NULL Terminator */ |
| 125 | buf[3] = len; |
| 126 | } |
| 127 | return 0; |
| 128 | } |
| 129 | |
Nicholas Bellinger | 784eb99 | 2011-09-16 01:31:28 -0700 | [diff] [blame] | 130 | static void |
Andy Shevchenko | b6b4e61 | 2011-09-19 11:11:21 +0300 | [diff] [blame] | 131 | 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] | 132 | { |
| 133 | unsigned char *p = &dev->se_sub_dev->t10_wwn.unit_serial[0]; |
Andy Shevchenko | b6b4e61 | 2011-09-19 11:11:21 +0300 | [diff] [blame] | 134 | int cnt; |
| 135 | bool next = true; |
| 136 | |
Nicholas Bellinger | 784eb99 | 2011-09-16 01:31:28 -0700 | [diff] [blame] | 137 | /* |
| 138 | * Generate up to 36 bits of VENDOR SPECIFIC IDENTIFIER starting on |
| 139 | * byte 3 bit 3-0 for NAA IEEE Registered Extended DESIGNATOR field |
| 140 | * format, followed by 64 bits of VENDOR SPECIFIC IDENTIFIER EXTENSION |
| 141 | * to complete the payload. These are based from VPD=0x80 PRODUCT SERIAL |
| 142 | * NUMBER set via vpd_unit_serial in target_core_configfs.c to ensure |
| 143 | * per device uniqeness. |
| 144 | */ |
Andy Shevchenko | b6b4e61 | 2011-09-19 11:11:21 +0300 | [diff] [blame] | 145 | for (cnt = 0; *p && cnt < 13; p++) { |
| 146 | int val = hex_to_bin(*p); |
| 147 | |
| 148 | if (val < 0) |
Nicholas Bellinger | 784eb99 | 2011-09-16 01:31:28 -0700 | [diff] [blame] | 149 | continue; |
Andy Shevchenko | b6b4e61 | 2011-09-19 11:11:21 +0300 | [diff] [blame] | 150 | |
| 151 | if (next) { |
| 152 | next = false; |
| 153 | buf[cnt++] |= val; |
Nicholas Bellinger | 784eb99 | 2011-09-16 01:31:28 -0700 | [diff] [blame] | 154 | } else { |
Andy Shevchenko | b6b4e61 | 2011-09-19 11:11:21 +0300 | [diff] [blame] | 155 | next = true; |
| 156 | buf[cnt] = val << 4; |
Nicholas Bellinger | 784eb99 | 2011-09-16 01:31:28 -0700 | [diff] [blame] | 157 | } |
| 158 | } |
| 159 | } |
| 160 | |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 161 | /* |
| 162 | * Device identification VPD, for a complete list of |
| 163 | * DESIGNATOR TYPEs see spc4r17 Table 459. |
| 164 | */ |
| 165 | static int |
| 166 | target_emulate_evpd_83(struct se_cmd *cmd, unsigned char *buf) |
| 167 | { |
Andy Grover | 5951146d | 2011-07-19 10:26:37 +0000 | [diff] [blame] | 168 | struct se_device *dev = cmd->se_dev; |
Andy Grover | e3d6f90 | 2011-07-19 08:55:10 +0000 | [diff] [blame] | 169 | struct se_lun *lun = cmd->se_lun; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 170 | struct se_port *port = NULL; |
| 171 | struct se_portal_group *tpg = NULL; |
| 172 | struct t10_alua_lu_gp_member *lu_gp_mem; |
| 173 | struct t10_alua_tg_pt_gp *tg_pt_gp; |
| 174 | struct t10_alua_tg_pt_gp_member *tg_pt_gp_mem; |
Andy Grover | e3d6f90 | 2011-07-19 08:55:10 +0000 | [diff] [blame] | 175 | unsigned char *prod = &dev->se_sub_dev->t10_wwn.model[0]; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 176 | u32 prod_len; |
| 177 | u32 unit_serial_len, off = 0; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 178 | u16 len = 0, id_len; |
| 179 | |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 180 | off = 4; |
| 181 | |
| 182 | /* |
| 183 | * NAA IEEE Registered Extended Assigned designator format, see |
| 184 | * spc4r17 section 7.7.3.6.5 |
| 185 | * |
| 186 | * We depend upon a target_core_mod/ConfigFS provided |
| 187 | * /sys/kernel/config/target/core/$HBA/$DEV/wwn/vpd_unit_serial |
| 188 | * value in order to return the NAA id. |
| 189 | */ |
| 190 | if (!(dev->se_sub_dev->su_dev_flags & SDF_EMULATED_VPD_UNIT_SERIAL)) |
| 191 | goto check_t10_vend_desc; |
| 192 | |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 193 | /* CODE SET == Binary */ |
| 194 | buf[off++] = 0x1; |
| 195 | |
Andy Shevchenko | 163cd5f | 2011-07-18 22:17:43 -0700 | [diff] [blame] | 196 | /* Set ASSOCIATION == addressed logical unit: 0)b */ |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 197 | buf[off] = 0x00; |
| 198 | |
| 199 | /* Identifier/Designator type == NAA identifier */ |
Andy Shevchenko | 163cd5f | 2011-07-18 22:17:43 -0700 | [diff] [blame] | 200 | buf[off++] |= 0x3; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 201 | off++; |
| 202 | |
| 203 | /* Identifier/Designator length */ |
| 204 | buf[off++] = 0x10; |
| 205 | |
| 206 | /* |
| 207 | * Start NAA IEEE Registered Extended Identifier/Designator |
| 208 | */ |
| 209 | buf[off++] = (0x6 << 4); |
| 210 | |
| 211 | /* |
| 212 | * Use OpenFabrics IEEE Company ID: 00 14 05 |
| 213 | */ |
| 214 | buf[off++] = 0x01; |
| 215 | buf[off++] = 0x40; |
| 216 | buf[off] = (0x5 << 4); |
| 217 | |
| 218 | /* |
| 219 | * Return ConfigFS Unit Serial Number information for |
| 220 | * VENDOR_SPECIFIC_IDENTIFIER and |
| 221 | * VENDOR_SPECIFIC_IDENTIFIER_EXTENTION |
| 222 | */ |
Nicholas Bellinger | 784eb99 | 2011-09-16 01:31:28 -0700 | [diff] [blame] | 223 | target_parse_naa_6h_vendor_specific(dev, &buf[off]); |
Andy Shevchenko | 11650b85 | 2011-07-18 22:26:40 -0700 | [diff] [blame] | 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 | |
Jörn Engel | 8359cf4 | 2011-11-24 02:05:51 +0100 | [diff] [blame] | 244 | id_len += sprintf(&buf[off+12], "%s:%s", prod, |
Andy Grover | e3d6f90 | 2011-07-19 08:55:10 +0000 | [diff] [blame] | 245 | &dev->se_sub_dev->t10_wwn.unit_serial[0]); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 246 | } |
| 247 | buf[off] = 0x2; /* ASCII */ |
| 248 | buf[off+1] = 0x1; /* T10 Vendor ID */ |
| 249 | buf[off+2] = 0x0; |
Jörn Engel | 8359cf4 | 2011-11-24 02:05:51 +0100 | [diff] [blame] | 250 | memcpy(&buf[off+4], "LIO-ORG", 8); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 251 | /* Extra Byte for NULL Terminator */ |
| 252 | id_len++; |
| 253 | /* Identifier Length */ |
| 254 | buf[off+3] = id_len; |
| 255 | /* Header size for Designation descriptor */ |
| 256 | len += (id_len + 4); |
| 257 | off += (id_len + 4); |
| 258 | /* |
| 259 | * struct se_port is only set for INQUIRY VPD=1 through $FABRIC_MOD |
| 260 | */ |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 261 | port = lun->lun_sep; |
| 262 | if (port) { |
| 263 | struct t10_alua_lu_gp *lu_gp; |
| 264 | u32 padding, scsi_name_len; |
| 265 | u16 lu_gp_id = 0; |
| 266 | u16 tg_pt_gp_id = 0; |
| 267 | u16 tpgt; |
| 268 | |
| 269 | tpg = port->sep_tpg; |
| 270 | /* |
| 271 | * Relative target port identifer, see spc4r17 |
| 272 | * section 7.7.3.7 |
| 273 | * |
| 274 | * Get the PROTOCOL IDENTIFIER as defined by spc4r17 |
| 275 | * section 7.5.1 Table 362 |
| 276 | */ |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 277 | buf[off] = |
Andy Grover | e3d6f90 | 2011-07-19 08:55:10 +0000 | [diff] [blame] | 278 | (tpg->se_tpg_tfo->get_fabric_proto_ident(tpg) << 4); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 279 | buf[off++] |= 0x1; /* CODE SET == Binary */ |
| 280 | buf[off] = 0x80; /* Set PIV=1 */ |
Andy Shevchenko | 163cd5f | 2011-07-18 22:17:43 -0700 | [diff] [blame] | 281 | /* Set ASSOCIATION == target port: 01b */ |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 282 | buf[off] |= 0x10; |
| 283 | /* DESIGNATOR TYPE == Relative target port identifer */ |
| 284 | buf[off++] |= 0x4; |
| 285 | off++; /* Skip over Reserved */ |
| 286 | buf[off++] = 4; /* DESIGNATOR LENGTH */ |
| 287 | /* Skip over Obsolete field in RTPI payload |
| 288 | * in Table 472 */ |
| 289 | off += 2; |
| 290 | buf[off++] = ((port->sep_rtpi >> 8) & 0xff); |
| 291 | buf[off++] = (port->sep_rtpi & 0xff); |
| 292 | len += 8; /* Header size + Designation descriptor */ |
| 293 | /* |
| 294 | * Target port group identifier, see spc4r17 |
| 295 | * section 7.7.3.8 |
| 296 | * |
| 297 | * Get the PROTOCOL IDENTIFIER as defined by spc4r17 |
| 298 | * section 7.5.1 Table 362 |
| 299 | */ |
Andy Grover | e3d6f90 | 2011-07-19 08:55:10 +0000 | [diff] [blame] | 300 | if (dev->se_sub_dev->t10_alua.alua_type != |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 301 | SPC3_ALUA_EMULATED) |
| 302 | goto check_scsi_name; |
| 303 | |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 304 | tg_pt_gp_mem = port->sep_alua_tg_pt_gp_mem; |
| 305 | if (!tg_pt_gp_mem) |
| 306 | goto check_lu_gp; |
| 307 | |
| 308 | spin_lock(&tg_pt_gp_mem->tg_pt_gp_mem_lock); |
| 309 | tg_pt_gp = tg_pt_gp_mem->tg_pt_gp; |
Andy Grover | 6708bb2 | 2011-06-08 10:36:43 -0700 | [diff] [blame] | 310 | if (!tg_pt_gp) { |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 311 | spin_unlock(&tg_pt_gp_mem->tg_pt_gp_mem_lock); |
| 312 | goto check_lu_gp; |
| 313 | } |
| 314 | tg_pt_gp_id = tg_pt_gp->tg_pt_gp_id; |
| 315 | spin_unlock(&tg_pt_gp_mem->tg_pt_gp_mem_lock); |
| 316 | |
| 317 | buf[off] = |
Andy Grover | e3d6f90 | 2011-07-19 08:55:10 +0000 | [diff] [blame] | 318 | (tpg->se_tpg_tfo->get_fabric_proto_ident(tpg) << 4); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 319 | buf[off++] |= 0x1; /* CODE SET == Binary */ |
| 320 | buf[off] = 0x80; /* Set PIV=1 */ |
Andy Shevchenko | 163cd5f | 2011-07-18 22:17:43 -0700 | [diff] [blame] | 321 | /* Set ASSOCIATION == target port: 01b */ |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 322 | buf[off] |= 0x10; |
| 323 | /* DESIGNATOR TYPE == Target port group identifier */ |
| 324 | buf[off++] |= 0x5; |
| 325 | off++; /* Skip over Reserved */ |
| 326 | buf[off++] = 4; /* DESIGNATOR LENGTH */ |
| 327 | off += 2; /* Skip over Reserved Field */ |
| 328 | buf[off++] = ((tg_pt_gp_id >> 8) & 0xff); |
| 329 | buf[off++] = (tg_pt_gp_id & 0xff); |
| 330 | len += 8; /* Header size + Designation descriptor */ |
| 331 | /* |
| 332 | * Logical Unit Group identifier, see spc4r17 |
| 333 | * section 7.7.3.8 |
| 334 | */ |
| 335 | check_lu_gp: |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 336 | lu_gp_mem = dev->dev_alua_lu_gp_mem; |
Andy Grover | 6708bb2 | 2011-06-08 10:36:43 -0700 | [diff] [blame] | 337 | if (!lu_gp_mem) |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 338 | goto check_scsi_name; |
| 339 | |
| 340 | spin_lock(&lu_gp_mem->lu_gp_mem_lock); |
| 341 | lu_gp = lu_gp_mem->lu_gp; |
Andy Grover | 6708bb2 | 2011-06-08 10:36:43 -0700 | [diff] [blame] | 342 | if (!lu_gp) { |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 343 | spin_unlock(&lu_gp_mem->lu_gp_mem_lock); |
| 344 | goto check_scsi_name; |
| 345 | } |
| 346 | lu_gp_id = lu_gp->lu_gp_id; |
| 347 | spin_unlock(&lu_gp_mem->lu_gp_mem_lock); |
| 348 | |
| 349 | buf[off++] |= 0x1; /* CODE SET == Binary */ |
| 350 | /* DESIGNATOR TYPE == Logical Unit Group identifier */ |
| 351 | buf[off++] |= 0x6; |
| 352 | off++; /* Skip over Reserved */ |
| 353 | buf[off++] = 4; /* DESIGNATOR LENGTH */ |
| 354 | off += 2; /* Skip over Reserved Field */ |
| 355 | buf[off++] = ((lu_gp_id >> 8) & 0xff); |
| 356 | buf[off++] = (lu_gp_id & 0xff); |
| 357 | len += 8; /* Header size + Designation descriptor */ |
| 358 | /* |
| 359 | * SCSI name string designator, see spc4r17 |
| 360 | * section 7.7.3.11 |
| 361 | * |
| 362 | * Get the PROTOCOL IDENTIFIER as defined by spc4r17 |
| 363 | * section 7.5.1 Table 362 |
| 364 | */ |
| 365 | check_scsi_name: |
Andy Grover | e3d6f90 | 2011-07-19 08:55:10 +0000 | [diff] [blame] | 366 | scsi_name_len = strlen(tpg->se_tpg_tfo->tpg_get_wwn(tpg)); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 367 | /* UTF-8 ",t,0x<16-bit TPGT>" + NULL Terminator */ |
| 368 | scsi_name_len += 10; |
| 369 | /* Check for 4-byte padding */ |
| 370 | padding = ((-scsi_name_len) & 3); |
| 371 | if (padding != 0) |
| 372 | scsi_name_len += padding; |
| 373 | /* Header size + Designation descriptor */ |
| 374 | scsi_name_len += 4; |
| 375 | |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 376 | buf[off] = |
Andy Grover | e3d6f90 | 2011-07-19 08:55:10 +0000 | [diff] [blame] | 377 | (tpg->se_tpg_tfo->get_fabric_proto_ident(tpg) << 4); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 378 | buf[off++] |= 0x3; /* CODE SET == UTF-8 */ |
| 379 | buf[off] = 0x80; /* Set PIV=1 */ |
Andy Shevchenko | 163cd5f | 2011-07-18 22:17:43 -0700 | [diff] [blame] | 380 | /* Set ASSOCIATION == target port: 01b */ |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 381 | buf[off] |= 0x10; |
| 382 | /* DESIGNATOR TYPE == SCSI name string */ |
| 383 | buf[off++] |= 0x8; |
| 384 | off += 2; /* Skip over Reserved and length */ |
| 385 | /* |
| 386 | * SCSI name string identifer containing, $FABRIC_MOD |
| 387 | * dependent information. For LIO-Target and iSCSI |
| 388 | * Target Port, this means "<iSCSI name>,t,0x<TPGT> in |
| 389 | * UTF-8 encoding. |
| 390 | */ |
Andy Grover | e3d6f90 | 2011-07-19 08:55:10 +0000 | [diff] [blame] | 391 | tpgt = tpg->se_tpg_tfo->tpg_get_tag(tpg); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 392 | scsi_name_len = sprintf(&buf[off], "%s,t,0x%04x", |
Andy Grover | e3d6f90 | 2011-07-19 08:55:10 +0000 | [diff] [blame] | 393 | tpg->se_tpg_tfo->tpg_get_wwn(tpg), tpgt); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 394 | scsi_name_len += 1 /* Include NULL terminator */; |
| 395 | /* |
| 396 | * The null-terminated, null-padded (see 4.4.2) SCSI |
| 397 | * NAME STRING field contains a UTF-8 format string. |
| 398 | * The number of bytes in the SCSI NAME STRING field |
| 399 | * (i.e., the value in the DESIGNATOR LENGTH field) |
| 400 | * shall be no larger than 256 and shall be a multiple |
| 401 | * of four. |
| 402 | */ |
| 403 | if (padding) |
| 404 | scsi_name_len += padding; |
| 405 | |
| 406 | buf[off-1] = scsi_name_len; |
| 407 | off += scsi_name_len; |
| 408 | /* Header size + Designation descriptor */ |
| 409 | len += (scsi_name_len + 4); |
| 410 | } |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 411 | buf[2] = ((len >> 8) & 0xff); |
| 412 | buf[3] = (len & 0xff); /* Page Length for VPD 0x83 */ |
| 413 | return 0; |
| 414 | } |
| 415 | |
| 416 | /* Extended INQUIRY Data VPD Page */ |
| 417 | static int |
| 418 | target_emulate_evpd_86(struct se_cmd *cmd, unsigned char *buf) |
| 419 | { |
Roland Dreier | 1289a05 | 2011-11-22 13:51:34 -0800 | [diff] [blame] | 420 | buf[3] = 0x3c; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 421 | /* Set HEADSUP, ORDSUP, SIMPSUP */ |
| 422 | buf[5] = 0x07; |
| 423 | |
| 424 | /* If WriteCache emulation is enabled, set V_SUP */ |
Andy Grover | 5951146d | 2011-07-19 10:26:37 +0000 | [diff] [blame] | 425 | 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] | 426 | buf[6] = 0x01; |
| 427 | return 0; |
| 428 | } |
| 429 | |
| 430 | /* Block Limits VPD page */ |
| 431 | static int |
| 432 | target_emulate_evpd_b0(struct se_cmd *cmd, unsigned char *buf) |
| 433 | { |
Andy Grover | 5951146d | 2011-07-19 10:26:37 +0000 | [diff] [blame] | 434 | struct se_device *dev = cmd->se_dev; |
Christoph Hellwig | bebe2fd | 2012-03-26 17:53:17 -0400 | [diff] [blame] | 435 | u32 max_sectors; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 436 | int have_tp = 0; |
| 437 | |
| 438 | /* |
| 439 | * Following sbc3r22 section 6.5.3 Block Limits VPD page, when |
| 440 | * emulate_tpu=1 or emulate_tpws=1 we will be expect a |
| 441 | * different page length for Thin Provisioning. |
| 442 | */ |
Andy Grover | e3d6f90 | 2011-07-19 08:55:10 +0000 | [diff] [blame] | 443 | 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] | 444 | have_tp = 1; |
| 445 | |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 446 | buf[0] = dev->transport->get_device_type(dev); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 447 | buf[3] = have_tp ? 0x3c : 0x10; |
| 448 | |
Andy Grover | 6708bb2 | 2011-06-08 10:36:43 -0700 | [diff] [blame] | 449 | /* Set WSNZ to 1 */ |
| 450 | buf[4] = 0x01; |
| 451 | |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 452 | /* |
| 453 | * Set OPTIMAL TRANSFER LENGTH GRANULARITY |
| 454 | */ |
| 455 | put_unaligned_be16(1, &buf[6]); |
| 456 | |
| 457 | /* |
| 458 | * Set MAXIMUM TRANSFER LENGTH |
| 459 | */ |
Christoph Hellwig | bebe2fd | 2012-03-26 17:53:17 -0400 | [diff] [blame] | 460 | max_sectors = min(dev->se_sub_dev->se_dev_attrib.fabric_max_sectors, |
Nicholas Bellinger | 11e764b | 2012-05-09 12:42:09 -0700 | [diff] [blame] | 461 | dev->se_sub_dev->se_dev_attrib.hw_max_sectors); |
Christoph Hellwig | bebe2fd | 2012-03-26 17:53:17 -0400 | [diff] [blame] | 462 | put_unaligned_be32(max_sectors, &buf[8]); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 463 | |
| 464 | /* |
| 465 | * Set OPTIMAL TRANSFER LENGTH |
| 466 | */ |
Andy Grover | e3d6f90 | 2011-07-19 08:55:10 +0000 | [diff] [blame] | 467 | 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] | 468 | |
| 469 | /* |
Roland Dreier | d95b824 | 2012-02-13 16:18:14 -0800 | [diff] [blame] | 470 | * Exit now if we don't support TP. |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 471 | */ |
Roland Dreier | d95b824 | 2012-02-13 16:18:14 -0800 | [diff] [blame] | 472 | if (!have_tp) |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 473 | return 0; |
| 474 | |
| 475 | /* |
| 476 | * Set MAXIMUM UNMAP LBA COUNT |
| 477 | */ |
Andy Grover | e3d6f90 | 2011-07-19 08:55:10 +0000 | [diff] [blame] | 478 | 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] | 479 | |
| 480 | /* |
| 481 | * Set MAXIMUM UNMAP BLOCK DESCRIPTOR COUNT |
| 482 | */ |
Andy Grover | e3d6f90 | 2011-07-19 08:55:10 +0000 | [diff] [blame] | 483 | 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] | 484 | &buf[24]); |
| 485 | |
| 486 | /* |
| 487 | * Set OPTIMAL UNMAP GRANULARITY |
| 488 | */ |
Andy Grover | e3d6f90 | 2011-07-19 08:55:10 +0000 | [diff] [blame] | 489 | 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] | 490 | |
| 491 | /* |
| 492 | * UNMAP GRANULARITY ALIGNMENT |
| 493 | */ |
Andy Grover | e3d6f90 | 2011-07-19 08:55:10 +0000 | [diff] [blame] | 494 | 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] | 495 | &buf[32]); |
Andy Grover | e3d6f90 | 2011-07-19 08:55:10 +0000 | [diff] [blame] | 496 | if (dev->se_sub_dev->se_dev_attrib.unmap_granularity_alignment != 0) |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 497 | buf[32] |= 0x80; /* Set the UGAVALID bit */ |
| 498 | |
| 499 | return 0; |
| 500 | } |
| 501 | |
Roland Dreier | e22a7f07 | 2011-07-05 13:34:52 -0700 | [diff] [blame] | 502 | /* Block Device Characteristics VPD page */ |
| 503 | static int |
| 504 | target_emulate_evpd_b1(struct se_cmd *cmd, unsigned char *buf) |
| 505 | { |
| 506 | struct se_device *dev = cmd->se_dev; |
| 507 | |
| 508 | buf[0] = dev->transport->get_device_type(dev); |
| 509 | buf[3] = 0x3c; |
Roland Dreier | d95b824 | 2012-02-13 16:18:14 -0800 | [diff] [blame] | 510 | buf[5] = dev->se_sub_dev->se_dev_attrib.is_nonrot ? 1 : 0; |
Roland Dreier | e22a7f07 | 2011-07-05 13:34:52 -0700 | [diff] [blame] | 511 | |
| 512 | return 0; |
| 513 | } |
| 514 | |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 515 | /* Thin Provisioning VPD */ |
| 516 | static int |
| 517 | target_emulate_evpd_b2(struct se_cmd *cmd, unsigned char *buf) |
| 518 | { |
Andy Grover | 5951146d | 2011-07-19 10:26:37 +0000 | [diff] [blame] | 519 | struct se_device *dev = cmd->se_dev; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 520 | |
| 521 | /* |
| 522 | * From sbc3r22 section 6.5.4 Thin Provisioning VPD page: |
| 523 | * |
| 524 | * The PAGE LENGTH field is defined in SPC-4. If the DP bit is set to |
| 525 | * zero, then the page length shall be set to 0004h. If the DP bit |
| 526 | * is set to one, then the page length shall be set to the value |
| 527 | * defined in table 162. |
| 528 | */ |
| 529 | buf[0] = dev->transport->get_device_type(dev); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 530 | |
| 531 | /* |
| 532 | * Set Hardcoded length mentioned above for DP=0 |
| 533 | */ |
| 534 | put_unaligned_be16(0x0004, &buf[2]); |
| 535 | |
| 536 | /* |
| 537 | * The THRESHOLD EXPONENT field indicates the threshold set size in |
| 538 | * LBAs as a power of 2 (i.e., the threshold set size is equal to |
| 539 | * 2(threshold exponent)). |
| 540 | * |
| 541 | * Note that this is currently set to 0x00 as mkp says it will be |
| 542 | * changing again. We can enable this once it has settled in T10 |
| 543 | * and is actually used by Linux/SCSI ML code. |
| 544 | */ |
| 545 | buf[4] = 0x00; |
| 546 | |
| 547 | /* |
| 548 | * A TPU bit set to one indicates that the device server supports |
| 549 | * the UNMAP command (see 5.25). A TPU bit set to zero indicates |
| 550 | * that the device server does not support the UNMAP command. |
| 551 | */ |
Andy Grover | e3d6f90 | 2011-07-19 08:55:10 +0000 | [diff] [blame] | 552 | if (dev->se_sub_dev->se_dev_attrib.emulate_tpu != 0) |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 553 | buf[5] = 0x80; |
| 554 | |
| 555 | /* |
| 556 | * A TPWS bit set to one indicates that the device server supports |
| 557 | * the use of the WRITE SAME (16) command (see 5.42) to unmap LBAs. |
| 558 | * A TPWS bit set to zero indicates that the device server does not |
| 559 | * support the use of the WRITE SAME (16) command to unmap LBAs. |
| 560 | */ |
Andy Grover | e3d6f90 | 2011-07-19 08:55:10 +0000 | [diff] [blame] | 561 | if (dev->se_sub_dev->se_dev_attrib.emulate_tpws != 0) |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 562 | buf[5] |= 0x40; |
| 563 | |
| 564 | return 0; |
| 565 | } |
| 566 | |
| 567 | static int |
Roland Dreier | b2eb705 | 2011-07-05 13:34:51 -0700 | [diff] [blame] | 568 | target_emulate_evpd_00(struct se_cmd *cmd, unsigned char *buf); |
| 569 | |
| 570 | static struct { |
| 571 | uint8_t page; |
| 572 | int (*emulate)(struct se_cmd *, unsigned char *); |
| 573 | } evpd_handlers[] = { |
| 574 | { .page = 0x00, .emulate = target_emulate_evpd_00 }, |
| 575 | { .page = 0x80, .emulate = target_emulate_evpd_80 }, |
| 576 | { .page = 0x83, .emulate = target_emulate_evpd_83 }, |
| 577 | { .page = 0x86, .emulate = target_emulate_evpd_86 }, |
| 578 | { .page = 0xb0, .emulate = target_emulate_evpd_b0 }, |
Roland Dreier | e22a7f07 | 2011-07-05 13:34:52 -0700 | [diff] [blame] | 579 | { .page = 0xb1, .emulate = target_emulate_evpd_b1 }, |
Roland Dreier | b2eb705 | 2011-07-05 13:34:51 -0700 | [diff] [blame] | 580 | { .page = 0xb2, .emulate = target_emulate_evpd_b2 }, |
| 581 | }; |
| 582 | |
| 583 | /* supported vital product data pages */ |
| 584 | static int |
| 585 | target_emulate_evpd_00(struct se_cmd *cmd, unsigned char *buf) |
| 586 | { |
| 587 | int p; |
| 588 | |
Roland Dreier | b2eb705 | 2011-07-05 13:34:51 -0700 | [diff] [blame] | 589 | /* |
| 590 | * Only report the INQUIRY EVPD=1 pages after a valid NAA |
| 591 | * Registered Extended LUN WWN has been set via ConfigFS |
| 592 | * during device creation/restart. |
| 593 | */ |
| 594 | if (cmd->se_dev->se_sub_dev->su_dev_flags & |
| 595 | SDF_EMULATED_VPD_UNIT_SERIAL) { |
| 596 | buf[3] = ARRAY_SIZE(evpd_handlers); |
Roland Dreier | d95b824 | 2012-02-13 16:18:14 -0800 | [diff] [blame] | 597 | for (p = 0; p < ARRAY_SIZE(evpd_handlers); ++p) |
Roland Dreier | b2eb705 | 2011-07-05 13:34:51 -0700 | [diff] [blame] | 598 | buf[p + 4] = evpd_handlers[p].page; |
| 599 | } |
| 600 | |
| 601 | return 0; |
| 602 | } |
| 603 | |
Christoph Hellwig | 6bb35e0 | 2012-04-23 11:35:33 -0400 | [diff] [blame] | 604 | int target_emulate_inquiry(struct se_cmd *cmd) |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 605 | { |
Andy Grover | 5951146d | 2011-07-19 10:26:37 +0000 | [diff] [blame] | 606 | struct se_device *dev = cmd->se_dev; |
Roland Dreier | 089461d | 2012-02-13 16:18:15 -0800 | [diff] [blame] | 607 | struct se_portal_group *tpg = cmd->se_lun->lun_sep->sep_tpg; |
Roland Dreier | d95b824 | 2012-02-13 16:18:14 -0800 | [diff] [blame] | 608 | unsigned char *buf, *map_buf; |
Andy Grover | a1d8b49 | 2011-05-02 17:12:10 -0700 | [diff] [blame] | 609 | unsigned char *cdb = cmd->t_task_cdb; |
Andy Grover | 05d1c7c | 2011-07-20 19:13:28 +0000 | [diff] [blame] | 610 | int p, ret; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 611 | |
Roland Dreier | d95b824 | 2012-02-13 16:18:14 -0800 | [diff] [blame] | 612 | map_buf = transport_kmap_data_sg(cmd); |
| 613 | /* |
| 614 | * If SCF_PASSTHROUGH_SG_TO_MEM_NOALLOC is not set, then we |
| 615 | * know we actually allocated a full page. Otherwise, if the |
| 616 | * data buffer is too small, allocate a temporary buffer so we |
| 617 | * don't have to worry about overruns in all our INQUIRY |
| 618 | * emulation handling. |
| 619 | */ |
| 620 | if (cmd->data_length < SE_INQUIRY_BUF && |
| 621 | (cmd->se_cmd_flags & SCF_PASSTHROUGH_SG_TO_MEM_NOALLOC)) { |
| 622 | buf = kzalloc(SE_INQUIRY_BUF, GFP_KERNEL); |
| 623 | if (!buf) { |
| 624 | transport_kunmap_data_sg(cmd); |
| 625 | cmd->scsi_sense_reason = TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; |
| 626 | return -ENOMEM; |
| 627 | } |
| 628 | } else { |
| 629 | buf = map_buf; |
| 630 | } |
| 631 | |
Roland Dreier | 089461d | 2012-02-13 16:18:15 -0800 | [diff] [blame] | 632 | if (dev == tpg->tpg_virt_lun0.lun_se_dev) |
| 633 | buf[0] = 0x3f; /* Not connected */ |
| 634 | else |
| 635 | buf[0] = dev->transport->get_device_type(dev); |
| 636 | |
Christoph Hellwig | d29a5b6 | 2011-11-03 17:50:44 -0400 | [diff] [blame] | 637 | if (!(cdb[1] & 0x1)) { |
Roland Dreier | bf00535 | 2012-01-17 18:00:57 -0800 | [diff] [blame] | 638 | if (cdb[2]) { |
| 639 | pr_err("INQUIRY with EVPD==0 but PAGE CODE=%02x\n", |
| 640 | cdb[2]); |
| 641 | cmd->scsi_sense_reason = TCM_INVALID_CDB_FIELD; |
Roland Dreier | d95b824 | 2012-02-13 16:18:14 -0800 | [diff] [blame] | 642 | ret = -EINVAL; |
| 643 | goto out; |
Roland Dreier | bf00535 | 2012-01-17 18:00:57 -0800 | [diff] [blame] | 644 | } |
| 645 | |
Roland Dreier | d95b824 | 2012-02-13 16:18:14 -0800 | [diff] [blame] | 646 | ret = target_emulate_inquiry_std(cmd, buf); |
Christoph Hellwig | d29a5b6 | 2011-11-03 17:50:44 -0400 | [diff] [blame] | 647 | goto out; |
| 648 | } |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 649 | |
Christoph Hellwig | d29a5b6 | 2011-11-03 17:50:44 -0400 | [diff] [blame] | 650 | for (p = 0; p < ARRAY_SIZE(evpd_handlers); ++p) { |
Roland Dreier | b2eb705 | 2011-07-05 13:34:51 -0700 | [diff] [blame] | 651 | if (cdb[2] == evpd_handlers[p].page) { |
| 652 | buf[1] = cdb[2]; |
Andy Grover | 05d1c7c | 2011-07-20 19:13:28 +0000 | [diff] [blame] | 653 | ret = evpd_handlers[p].emulate(cmd, buf); |
Roland Dreier | d95b824 | 2012-02-13 16:18:14 -0800 | [diff] [blame] | 654 | goto out; |
Roland Dreier | b2eb705 | 2011-07-05 13:34:51 -0700 | [diff] [blame] | 655 | } |
Christoph Hellwig | d29a5b6 | 2011-11-03 17:50:44 -0400 | [diff] [blame] | 656 | } |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 657 | |
Andy Grover | 6708bb2 | 2011-06-08 10:36:43 -0700 | [diff] [blame] | 658 | pr_err("Unknown VPD Code: 0x%02x\n", cdb[2]); |
Roland Dreier | bb1acb2 | 2012-01-17 18:00:56 -0800 | [diff] [blame] | 659 | cmd->scsi_sense_reason = TCM_INVALID_CDB_FIELD; |
Christoph Hellwig | d29a5b6 | 2011-11-03 17:50:44 -0400 | [diff] [blame] | 660 | ret = -EINVAL; |
| 661 | |
Christoph Hellwig | d29a5b6 | 2011-11-03 17:50:44 -0400 | [diff] [blame] | 662 | out: |
Roland Dreier | d95b824 | 2012-02-13 16:18:14 -0800 | [diff] [blame] | 663 | if (buf != map_buf) { |
| 664 | memcpy(map_buf, buf, cmd->data_length); |
| 665 | kfree(buf); |
| 666 | } |
| 667 | transport_kunmap_data_sg(cmd); |
| 668 | |
Christoph Hellwig | 6bb35e0 | 2012-04-23 11:35:33 -0400 | [diff] [blame] | 669 | if (!ret) |
| 670 | target_complete_cmd(cmd, GOOD); |
Christoph Hellwig | d29a5b6 | 2011-11-03 17:50:44 -0400 | [diff] [blame] | 671 | return ret; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 672 | } |
| 673 | |
Christoph Hellwig | 6bb35e0 | 2012-04-23 11:35:33 -0400 | [diff] [blame] | 674 | int target_emulate_readcapacity(struct se_cmd *cmd) |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 675 | { |
Andy Grover | 5951146d | 2011-07-19 10:26:37 +0000 | [diff] [blame] | 676 | struct se_device *dev = cmd->se_dev; |
Andy Grover | 05d1c7c | 2011-07-20 19:13:28 +0000 | [diff] [blame] | 677 | unsigned char *buf; |
Nicholas Bellinger | 904f0bc | 2011-03-02 15:52:51 -0800 | [diff] [blame] | 678 | unsigned long long blocks_long = dev->transport->get_blocks(dev); |
| 679 | u32 blocks; |
| 680 | |
| 681 | if (blocks_long >= 0x00000000ffffffff) |
| 682 | blocks = 0xffffffff; |
| 683 | else |
| 684 | blocks = (u32)blocks_long; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 685 | |
Andy Grover | 4949314 | 2012-01-16 16:57:08 -0800 | [diff] [blame] | 686 | buf = transport_kmap_data_sg(cmd); |
Andy Grover | 05d1c7c | 2011-07-20 19:13:28 +0000 | [diff] [blame] | 687 | |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 688 | buf[0] = (blocks >> 24) & 0xff; |
| 689 | buf[1] = (blocks >> 16) & 0xff; |
| 690 | buf[2] = (blocks >> 8) & 0xff; |
| 691 | buf[3] = blocks & 0xff; |
Andy Grover | e3d6f90 | 2011-07-19 08:55:10 +0000 | [diff] [blame] | 692 | buf[4] = (dev->se_sub_dev->se_dev_attrib.block_size >> 24) & 0xff; |
| 693 | buf[5] = (dev->se_sub_dev->se_dev_attrib.block_size >> 16) & 0xff; |
| 694 | buf[6] = (dev->se_sub_dev->se_dev_attrib.block_size >> 8) & 0xff; |
| 695 | buf[7] = dev->se_sub_dev->se_dev_attrib.block_size & 0xff; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 696 | |
Andy Grover | 4949314 | 2012-01-16 16:57:08 -0800 | [diff] [blame] | 697 | transport_kunmap_data_sg(cmd); |
Andy Grover | 05d1c7c | 2011-07-20 19:13:28 +0000 | [diff] [blame] | 698 | |
Christoph Hellwig | 6bb35e0 | 2012-04-23 11:35:33 -0400 | [diff] [blame] | 699 | target_complete_cmd(cmd, GOOD); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 700 | return 0; |
| 701 | } |
| 702 | |
Christoph Hellwig | 6bb35e0 | 2012-04-23 11:35:33 -0400 | [diff] [blame] | 703 | int target_emulate_readcapacity_16(struct se_cmd *cmd) |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 704 | { |
Andy Grover | 5951146d | 2011-07-19 10:26:37 +0000 | [diff] [blame] | 705 | struct se_device *dev = cmd->se_dev; |
Andy Grover | 05d1c7c | 2011-07-20 19:13:28 +0000 | [diff] [blame] | 706 | unsigned char *buf; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 707 | unsigned long long blocks = dev->transport->get_blocks(dev); |
| 708 | |
Andy Grover | 4949314 | 2012-01-16 16:57:08 -0800 | [diff] [blame] | 709 | buf = transport_kmap_data_sg(cmd); |
Andy Grover | 05d1c7c | 2011-07-20 19:13:28 +0000 | [diff] [blame] | 710 | |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 711 | buf[0] = (blocks >> 56) & 0xff; |
| 712 | buf[1] = (blocks >> 48) & 0xff; |
| 713 | buf[2] = (blocks >> 40) & 0xff; |
| 714 | buf[3] = (blocks >> 32) & 0xff; |
| 715 | buf[4] = (blocks >> 24) & 0xff; |
| 716 | buf[5] = (blocks >> 16) & 0xff; |
| 717 | buf[6] = (blocks >> 8) & 0xff; |
| 718 | buf[7] = blocks & 0xff; |
Andy Grover | e3d6f90 | 2011-07-19 08:55:10 +0000 | [diff] [blame] | 719 | buf[8] = (dev->se_sub_dev->se_dev_attrib.block_size >> 24) & 0xff; |
| 720 | buf[9] = (dev->se_sub_dev->se_dev_attrib.block_size >> 16) & 0xff; |
| 721 | buf[10] = (dev->se_sub_dev->se_dev_attrib.block_size >> 8) & 0xff; |
| 722 | buf[11] = dev->se_sub_dev->se_dev_attrib.block_size & 0xff; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 723 | /* |
| 724 | * Set Thin Provisioning Enable bit following sbc3r22 in section |
| 725 | * READ CAPACITY (16) byte 14 if emulate_tpu or emulate_tpws is enabled. |
| 726 | */ |
Andy Grover | e3d6f90 | 2011-07-19 08:55:10 +0000 | [diff] [blame] | 727 | 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] | 728 | buf[14] = 0x80; |
| 729 | |
Andy Grover | 4949314 | 2012-01-16 16:57:08 -0800 | [diff] [blame] | 730 | transport_kunmap_data_sg(cmd); |
Andy Grover | 05d1c7c | 2011-07-20 19:13:28 +0000 | [diff] [blame] | 731 | |
Christoph Hellwig | 6bb35e0 | 2012-04-23 11:35:33 -0400 | [diff] [blame] | 732 | target_complete_cmd(cmd, GOOD); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 733 | return 0; |
| 734 | } |
| 735 | |
| 736 | static int |
| 737 | target_modesense_rwrecovery(unsigned char *p) |
| 738 | { |
| 739 | p[0] = 0x01; |
| 740 | p[1] = 0x0a; |
| 741 | |
| 742 | return 12; |
| 743 | } |
| 744 | |
| 745 | static int |
| 746 | target_modesense_control(struct se_device *dev, unsigned char *p) |
| 747 | { |
| 748 | p[0] = 0x0a; |
| 749 | p[1] = 0x0a; |
| 750 | p[2] = 2; |
| 751 | /* |
Nicholas Bellinger | 5de619a | 2011-07-17 02:57:58 -0700 | [diff] [blame] | 752 | * From spc4r23, 7.4.7 Control mode page |
| 753 | * |
| 754 | * The QUEUE ALGORITHM MODIFIER field (see table 368) specifies |
| 755 | * restrictions on the algorithm used for reordering commands |
| 756 | * having the SIMPLE task attribute (see SAM-4). |
| 757 | * |
| 758 | * Table 368 -- QUEUE ALGORITHM MODIFIER field |
| 759 | * Code Description |
| 760 | * 0h Restricted reordering |
| 761 | * 1h Unrestricted reordering allowed |
| 762 | * 2h to 7h Reserved |
| 763 | * 8h to Fh Vendor specific |
| 764 | * |
| 765 | * A value of zero in the QUEUE ALGORITHM MODIFIER field specifies that |
| 766 | * the device server shall order the processing sequence of commands |
| 767 | * having the SIMPLE task attribute such that data integrity is maintained |
| 768 | * for that I_T nexus (i.e., if the transmission of new SCSI transport protocol |
| 769 | * requests is halted at any time, the final value of all data observable |
| 770 | * on the medium shall be the same as if all the commands had been processed |
| 771 | * with the ORDERED task attribute). |
| 772 | * |
| 773 | * A value of one in the QUEUE ALGORITHM MODIFIER field specifies that the |
| 774 | * device server may reorder the processing sequence of commands having the |
| 775 | * SIMPLE task attribute in any manner. Any data integrity exposures related to |
| 776 | * command sequence order shall be explicitly handled by the application client |
| 777 | * through the selection of appropriate ommands and task attributes. |
| 778 | */ |
| 779 | p[3] = (dev->se_sub_dev->se_dev_attrib.emulate_rest_reord == 1) ? 0x00 : 0x10; |
| 780 | /* |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 781 | * From spc4r17, section 7.4.6 Control mode Page |
| 782 | * |
| 783 | * Unit Attention interlocks control (UN_INTLCK_CTRL) to code 00b |
| 784 | * |
| 785 | * 00b: The logical unit shall clear any unit attention condition |
| 786 | * reported in the same I_T_L_Q nexus transaction as a CHECK CONDITION |
| 787 | * status and shall not establish a unit attention condition when a com- |
| 788 | * mand is completed with BUSY, TASK SET FULL, or RESERVATION CONFLICT |
| 789 | * status. |
| 790 | * |
| 791 | * 10b: The logical unit shall not clear any unit attention condition |
| 792 | * reported in the same I_T_L_Q nexus transaction as a CHECK CONDITION |
| 793 | * status and shall not establish a unit attention condition when |
| 794 | * a command is completed with BUSY, TASK SET FULL, or RESERVATION |
| 795 | * CONFLICT status. |
| 796 | * |
| 797 | * 11b a The logical unit shall not clear any unit attention condition |
| 798 | * reported in the same I_T_L_Q nexus transaction as a CHECK CONDITION |
| 799 | * status and shall establish a unit attention condition for the |
| 800 | * initiator port associated with the I_T nexus on which the BUSY, |
| 801 | * TASK SET FULL, or RESERVATION CONFLICT status is being returned. |
| 802 | * Depending on the status, the additional sense code shall be set to |
| 803 | * PREVIOUS BUSY STATUS, PREVIOUS TASK SET FULL STATUS, or PREVIOUS |
| 804 | * RESERVATION CONFLICT STATUS. Until it is cleared by a REQUEST SENSE |
| 805 | * command, a unit attention condition shall be established only once |
| 806 | * for a BUSY, TASK SET FULL, or RESERVATION CONFLICT status regardless |
| 807 | * to the number of commands completed with one of those status codes. |
| 808 | */ |
Andy Grover | e3d6f90 | 2011-07-19 08:55:10 +0000 | [diff] [blame] | 809 | p[4] = (dev->se_sub_dev->se_dev_attrib.emulate_ua_intlck_ctrl == 2) ? 0x30 : |
| 810 | (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] | 811 | /* |
| 812 | * From spc4r17, section 7.4.6 Control mode Page |
| 813 | * |
| 814 | * Task Aborted Status (TAS) bit set to zero. |
| 815 | * |
| 816 | * A task aborted status (TAS) bit set to zero specifies that aborted |
| 817 | * tasks shall be terminated by the device server without any response |
| 818 | * to the application client. A TAS bit set to one specifies that tasks |
| 819 | * aborted by the actions of an I_T nexus other than the I_T nexus on |
| 820 | * which the command was received shall be completed with TASK ABORTED |
| 821 | * status (see SAM-4). |
| 822 | */ |
Andy Grover | e3d6f90 | 2011-07-19 08:55:10 +0000 | [diff] [blame] | 823 | 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] | 824 | p[8] = 0xff; |
| 825 | p[9] = 0xff; |
| 826 | p[11] = 30; |
| 827 | |
| 828 | return 12; |
| 829 | } |
| 830 | |
| 831 | static int |
| 832 | target_modesense_caching(struct se_device *dev, unsigned char *p) |
| 833 | { |
| 834 | p[0] = 0x08; |
| 835 | p[1] = 0x12; |
Andy Grover | e3d6f90 | 2011-07-19 08:55:10 +0000 | [diff] [blame] | 836 | if (dev->se_sub_dev->se_dev_attrib.emulate_write_cache > 0) |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 837 | p[2] = 0x04; /* Write Cache Enable */ |
| 838 | p[12] = 0x20; /* Disabled Read Ahead */ |
| 839 | |
| 840 | return 20; |
| 841 | } |
| 842 | |
| 843 | static void |
| 844 | target_modesense_write_protect(unsigned char *buf, int type) |
| 845 | { |
| 846 | /* |
| 847 | * I believe that the WP bit (bit 7) in the mode header is the same for |
| 848 | * all device types.. |
| 849 | */ |
| 850 | switch (type) { |
| 851 | case TYPE_DISK: |
| 852 | case TYPE_TAPE: |
| 853 | default: |
| 854 | buf[0] |= 0x80; /* WP bit */ |
| 855 | break; |
| 856 | } |
| 857 | } |
| 858 | |
| 859 | static void |
| 860 | target_modesense_dpofua(unsigned char *buf, int type) |
| 861 | { |
| 862 | switch (type) { |
| 863 | case TYPE_DISK: |
| 864 | buf[0] |= 0x10; /* DPOFUA bit */ |
| 865 | break; |
| 866 | default: |
| 867 | break; |
| 868 | } |
| 869 | } |
| 870 | |
Christoph Hellwig | 6bb35e0 | 2012-04-23 11:35:33 -0400 | [diff] [blame] | 871 | int target_emulate_modesense(struct se_cmd *cmd) |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 872 | { |
Andy Grover | 5951146d | 2011-07-19 10:26:37 +0000 | [diff] [blame] | 873 | struct se_device *dev = cmd->se_dev; |
Andy Grover | a1d8b49 | 2011-05-02 17:12:10 -0700 | [diff] [blame] | 874 | char *cdb = cmd->t_task_cdb; |
Andy Grover | 05d1c7c | 2011-07-20 19:13:28 +0000 | [diff] [blame] | 875 | unsigned char *rbuf; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 876 | int type = dev->transport->get_device_type(dev); |
Christoph Hellwig | 6ed5a55 | 2011-11-03 17:50:43 -0400 | [diff] [blame] | 877 | int ten = (cmd->t_task_cdb[0] == MODE_SENSE_10); |
| 878 | int offset = ten ? 8 : 4; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 879 | int length = 0; |
| 880 | unsigned char buf[SE_MODE_PAGE_BUF]; |
| 881 | |
| 882 | memset(buf, 0, SE_MODE_PAGE_BUF); |
| 883 | |
| 884 | switch (cdb[2] & 0x3f) { |
| 885 | case 0x01: |
| 886 | length = target_modesense_rwrecovery(&buf[offset]); |
| 887 | break; |
| 888 | case 0x08: |
| 889 | length = target_modesense_caching(dev, &buf[offset]); |
| 890 | break; |
| 891 | case 0x0a: |
| 892 | length = target_modesense_control(dev, &buf[offset]); |
| 893 | break; |
| 894 | case 0x3f: |
| 895 | length = target_modesense_rwrecovery(&buf[offset]); |
| 896 | length += target_modesense_caching(dev, &buf[offset+length]); |
| 897 | length += target_modesense_control(dev, &buf[offset+length]); |
| 898 | break; |
| 899 | default: |
Roland Dreier | f15ea57 | 2011-08-12 10:01:24 -0700 | [diff] [blame] | 900 | pr_err("MODE SENSE: unimplemented page/subpage: 0x%02x/0x%02x\n", |
| 901 | cdb[2] & 0x3f, cdb[3]); |
Nicholas Bellinger | 03e98c9 | 2011-11-04 02:36:16 -0700 | [diff] [blame] | 902 | cmd->scsi_sense_reason = TCM_UNKNOWN_MODE_PAGE; |
| 903 | return -EINVAL; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 904 | } |
| 905 | offset += length; |
| 906 | |
| 907 | if (ten) { |
| 908 | offset -= 2; |
| 909 | buf[0] = (offset >> 8) & 0xff; |
| 910 | buf[1] = offset & 0xff; |
| 911 | |
Andy Grover | e3d6f90 | 2011-07-19 08:55:10 +0000 | [diff] [blame] | 912 | if ((cmd->se_lun->lun_access & TRANSPORT_LUNFLAGS_READ_ONLY) || |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 913 | (cmd->se_deve && |
| 914 | (cmd->se_deve->lun_flags & TRANSPORT_LUNFLAGS_READ_ONLY))) |
| 915 | target_modesense_write_protect(&buf[3], type); |
| 916 | |
Andy Grover | e3d6f90 | 2011-07-19 08:55:10 +0000 | [diff] [blame] | 917 | if ((dev->se_sub_dev->se_dev_attrib.emulate_write_cache > 0) && |
| 918 | (dev->se_sub_dev->se_dev_attrib.emulate_fua_write > 0)) |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 919 | target_modesense_dpofua(&buf[3], type); |
| 920 | |
| 921 | if ((offset + 2) > cmd->data_length) |
| 922 | offset = cmd->data_length; |
| 923 | |
| 924 | } else { |
| 925 | offset -= 1; |
| 926 | buf[0] = offset & 0xff; |
| 927 | |
Andy Grover | e3d6f90 | 2011-07-19 08:55:10 +0000 | [diff] [blame] | 928 | if ((cmd->se_lun->lun_access & TRANSPORT_LUNFLAGS_READ_ONLY) || |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 929 | (cmd->se_deve && |
| 930 | (cmd->se_deve->lun_flags & TRANSPORT_LUNFLAGS_READ_ONLY))) |
| 931 | target_modesense_write_protect(&buf[2], type); |
| 932 | |
Andy Grover | e3d6f90 | 2011-07-19 08:55:10 +0000 | [diff] [blame] | 933 | if ((dev->se_sub_dev->se_dev_attrib.emulate_write_cache > 0) && |
| 934 | (dev->se_sub_dev->se_dev_attrib.emulate_fua_write > 0)) |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 935 | target_modesense_dpofua(&buf[2], type); |
| 936 | |
| 937 | if ((offset + 1) > cmd->data_length) |
| 938 | offset = cmd->data_length; |
| 939 | } |
Andy Grover | 05d1c7c | 2011-07-20 19:13:28 +0000 | [diff] [blame] | 940 | |
Andy Grover | 4949314 | 2012-01-16 16:57:08 -0800 | [diff] [blame] | 941 | rbuf = transport_kmap_data_sg(cmd); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 942 | memcpy(rbuf, buf, offset); |
Andy Grover | 4949314 | 2012-01-16 16:57:08 -0800 | [diff] [blame] | 943 | transport_kunmap_data_sg(cmd); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 944 | |
Christoph Hellwig | 6bb35e0 | 2012-04-23 11:35:33 -0400 | [diff] [blame] | 945 | target_complete_cmd(cmd, GOOD); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 946 | return 0; |
| 947 | } |
| 948 | |
Christoph Hellwig | 6bb35e0 | 2012-04-23 11:35:33 -0400 | [diff] [blame] | 949 | int target_emulate_request_sense(struct se_cmd *cmd) |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 950 | { |
Andy Grover | a1d8b49 | 2011-05-02 17:12:10 -0700 | [diff] [blame] | 951 | unsigned char *cdb = cmd->t_task_cdb; |
Andy Grover | 05d1c7c | 2011-07-20 19:13:28 +0000 | [diff] [blame] | 952 | unsigned char *buf; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 953 | u8 ua_asc = 0, ua_ascq = 0; |
Andy Grover | 05d1c7c | 2011-07-20 19:13:28 +0000 | [diff] [blame] | 954 | int err = 0; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 955 | |
| 956 | if (cdb[1] & 0x01) { |
Andy Grover | 6708bb2 | 2011-06-08 10:36:43 -0700 | [diff] [blame] | 957 | pr_err("REQUEST_SENSE description emulation not" |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 958 | " supported\n"); |
Nicholas Bellinger | 03e98c9 | 2011-11-04 02:36:16 -0700 | [diff] [blame] | 959 | cmd->scsi_sense_reason = TCM_INVALID_CDB_FIELD; |
| 960 | return -ENOSYS; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 961 | } |
Andy Grover | 05d1c7c | 2011-07-20 19:13:28 +0000 | [diff] [blame] | 962 | |
Andy Grover | 4949314 | 2012-01-16 16:57:08 -0800 | [diff] [blame] | 963 | buf = transport_kmap_data_sg(cmd); |
Andy Grover | 05d1c7c | 2011-07-20 19:13:28 +0000 | [diff] [blame] | 964 | |
Andy Grover | 6708bb2 | 2011-06-08 10:36:43 -0700 | [diff] [blame] | 965 | 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] | 966 | /* |
| 967 | * CURRENT ERROR, UNIT ATTENTION |
| 968 | */ |
| 969 | buf[0] = 0x70; |
| 970 | buf[SPC_SENSE_KEY_OFFSET] = UNIT_ATTENTION; |
Sebastian Andrzej Siewior | 95fe1ee | 2012-01-18 14:04:29 +0100 | [diff] [blame] | 971 | |
| 972 | if (cmd->data_length < 18) { |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 973 | buf[7] = 0x00; |
Andy Grover | 05d1c7c | 2011-07-20 19:13:28 +0000 | [diff] [blame] | 974 | err = -EINVAL; |
| 975 | goto end; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 976 | } |
| 977 | /* |
| 978 | * The Additional Sense Code (ASC) from the UNIT ATTENTION |
| 979 | */ |
| 980 | buf[SPC_ASC_KEY_OFFSET] = ua_asc; |
| 981 | buf[SPC_ASCQ_KEY_OFFSET] = ua_ascq; |
| 982 | buf[7] = 0x0A; |
| 983 | } else { |
| 984 | /* |
| 985 | * CURRENT ERROR, NO SENSE |
| 986 | */ |
| 987 | buf[0] = 0x70; |
| 988 | buf[SPC_SENSE_KEY_OFFSET] = NO_SENSE; |
Sebastian Andrzej Siewior | 95fe1ee | 2012-01-18 14:04:29 +0100 | [diff] [blame] | 989 | |
| 990 | if (cmd->data_length < 18) { |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 991 | buf[7] = 0x00; |
Andy Grover | 05d1c7c | 2011-07-20 19:13:28 +0000 | [diff] [blame] | 992 | err = -EINVAL; |
| 993 | goto end; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 994 | } |
| 995 | /* |
| 996 | * NO ADDITIONAL SENSE INFORMATION |
| 997 | */ |
| 998 | buf[SPC_ASC_KEY_OFFSET] = 0x00; |
| 999 | buf[7] = 0x0A; |
| 1000 | } |
| 1001 | |
Andy Grover | 05d1c7c | 2011-07-20 19:13:28 +0000 | [diff] [blame] | 1002 | end: |
Andy Grover | 4949314 | 2012-01-16 16:57:08 -0800 | [diff] [blame] | 1003 | transport_kunmap_data_sg(cmd); |
Christoph Hellwig | 6bb35e0 | 2012-04-23 11:35:33 -0400 | [diff] [blame] | 1004 | target_complete_cmd(cmd, GOOD); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 1005 | return 0; |
| 1006 | } |
| 1007 | |
| 1008 | /* |
| 1009 | * Used for TCM/IBLOCK and TCM/FILEIO for block/blk-lib.c level discard support. |
| 1010 | * Note this is not used for TCM/pSCSI passthrough |
| 1011 | */ |
Christoph Hellwig | 6bb35e0 | 2012-04-23 11:35:33 -0400 | [diff] [blame] | 1012 | int target_emulate_unmap(struct se_cmd *cmd) |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 1013 | { |
Andy Grover | 5951146d | 2011-07-19 10:26:37 +0000 | [diff] [blame] | 1014 | struct se_device *dev = cmd->se_dev; |
Andy Grover | 05d1c7c | 2011-07-20 19:13:28 +0000 | [diff] [blame] | 1015 | unsigned char *buf, *ptr = NULL; |
Andy Grover | a1d8b49 | 2011-05-02 17:12:10 -0700 | [diff] [blame] | 1016 | unsigned char *cdb = &cmd->t_task_cdb[0]; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 1017 | sector_t lba; |
| 1018 | unsigned int size = cmd->data_length, range; |
Andy Grover | 05d1c7c | 2011-07-20 19:13:28 +0000 | [diff] [blame] | 1019 | int ret = 0, offset; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 1020 | unsigned short dl, bd_dl; |
| 1021 | |
Christoph Hellwig | 6ed5a55 | 2011-11-03 17:50:43 -0400 | [diff] [blame] | 1022 | if (!dev->transport->do_discard) { |
| 1023 | pr_err("UNMAP emulation not supported for: %s\n", |
| 1024 | dev->transport->name); |
Nicholas Bellinger | 03e98c9 | 2011-11-04 02:36:16 -0700 | [diff] [blame] | 1025 | cmd->scsi_sense_reason = TCM_UNSUPPORTED_SCSI_OPCODE; |
| 1026 | return -ENOSYS; |
Christoph Hellwig | 6ed5a55 | 2011-11-03 17:50:43 -0400 | [diff] [blame] | 1027 | } |
| 1028 | |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 1029 | /* First UNMAP block descriptor starts at 8 byte offset */ |
| 1030 | offset = 8; |
| 1031 | size -= 8; |
| 1032 | dl = get_unaligned_be16(&cdb[0]); |
| 1033 | bd_dl = get_unaligned_be16(&cdb[2]); |
Andy Grover | 05d1c7c | 2011-07-20 19:13:28 +0000 | [diff] [blame] | 1034 | |
Andy Grover | 4949314 | 2012-01-16 16:57:08 -0800 | [diff] [blame] | 1035 | buf = transport_kmap_data_sg(cmd); |
Andy Grover | 05d1c7c | 2011-07-20 19:13:28 +0000 | [diff] [blame] | 1036 | |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 1037 | ptr = &buf[offset]; |
Andy Grover | 6708bb2 | 2011-06-08 10:36:43 -0700 | [diff] [blame] | 1038 | 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] | 1039 | " ptr: %p\n", dev->transport->name, dl, bd_dl, size, ptr); |
| 1040 | |
| 1041 | while (size) { |
| 1042 | lba = get_unaligned_be64(&ptr[0]); |
| 1043 | range = get_unaligned_be32(&ptr[8]); |
Andy Grover | 6708bb2 | 2011-06-08 10:36:43 -0700 | [diff] [blame] | 1044 | pr_debug("UNMAP: Using lba: %llu and range: %u\n", |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 1045 | (unsigned long long)lba, range); |
| 1046 | |
| 1047 | ret = dev->transport->do_discard(dev, lba, range); |
| 1048 | if (ret < 0) { |
Andy Grover | 6708bb2 | 2011-06-08 10:36:43 -0700 | [diff] [blame] | 1049 | pr_err("blkdev_issue_discard() failed: %d\n", |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 1050 | ret); |
Andy Grover | 05d1c7c | 2011-07-20 19:13:28 +0000 | [diff] [blame] | 1051 | goto err; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 1052 | } |
| 1053 | |
| 1054 | ptr += 16; |
| 1055 | size -= 16; |
| 1056 | } |
| 1057 | |
Andy Grover | 05d1c7c | 2011-07-20 19:13:28 +0000 | [diff] [blame] | 1058 | err: |
Andy Grover | 4949314 | 2012-01-16 16:57:08 -0800 | [diff] [blame] | 1059 | transport_kunmap_data_sg(cmd); |
Christoph Hellwig | 6bb35e0 | 2012-04-23 11:35:33 -0400 | [diff] [blame] | 1060 | if (!ret) |
| 1061 | target_complete_cmd(cmd, GOOD); |
Andy Grover | 05d1c7c | 2011-07-20 19:13:28 +0000 | [diff] [blame] | 1062 | return ret; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 1063 | } |
| 1064 | |
| 1065 | /* |
| 1066 | * Used for TCM/IBLOCK and TCM/FILEIO for block/blk-lib.c level discard support. |
| 1067 | * Note this is not used for TCM/pSCSI passthrough |
| 1068 | */ |
Christoph Hellwig | 6bb35e0 | 2012-04-23 11:35:33 -0400 | [diff] [blame] | 1069 | int target_emulate_write_same(struct se_cmd *cmd) |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 1070 | { |
Andy Grover | 5951146d | 2011-07-19 10:26:37 +0000 | [diff] [blame] | 1071 | struct se_device *dev = cmd->se_dev; |
Andy Grover | a1d8b49 | 2011-05-02 17:12:10 -0700 | [diff] [blame] | 1072 | sector_t range; |
| 1073 | sector_t lba = cmd->t_task_lba; |
Christoph Hellwig | 6ed5a55 | 2011-11-03 17:50:43 -0400 | [diff] [blame] | 1074 | u32 num_blocks; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 1075 | int ret; |
Christoph Hellwig | 6ed5a55 | 2011-11-03 17:50:43 -0400 | [diff] [blame] | 1076 | |
| 1077 | if (!dev->transport->do_discard) { |
| 1078 | pr_err("WRITE_SAME emulation not supported" |
| 1079 | " for: %s\n", dev->transport->name); |
Nicholas Bellinger | 03e98c9 | 2011-11-04 02:36:16 -0700 | [diff] [blame] | 1080 | cmd->scsi_sense_reason = TCM_UNSUPPORTED_SCSI_OPCODE; |
| 1081 | return -ENOSYS; |
Christoph Hellwig | 6ed5a55 | 2011-11-03 17:50:43 -0400 | [diff] [blame] | 1082 | } |
| 1083 | |
| 1084 | if (cmd->t_task_cdb[0] == WRITE_SAME) |
| 1085 | num_blocks = get_unaligned_be16(&cmd->t_task_cdb[7]); |
| 1086 | else if (cmd->t_task_cdb[0] == WRITE_SAME_16) |
| 1087 | num_blocks = get_unaligned_be32(&cmd->t_task_cdb[10]); |
| 1088 | else /* WRITE_SAME_32 via VARIABLE_LENGTH_CMD */ |
| 1089 | num_blocks = get_unaligned_be32(&cmd->t_task_cdb[28]); |
| 1090 | |
Nicholas Bellinger | dd3a5ad | 2011-05-06 17:55:35 -0700 | [diff] [blame] | 1091 | /* |
Nicholas Bellinger | 706d586 | 2011-07-28 00:07:03 -0700 | [diff] [blame] | 1092 | * Use the explicit range when non zero is supplied, otherwise calculate |
| 1093 | * the remaining range based on ->get_blocks() - starting LBA. |
Nicholas Bellinger | dd3a5ad | 2011-05-06 17:55:35 -0700 | [diff] [blame] | 1094 | */ |
Nicholas Bellinger | dd3a5ad | 2011-05-06 17:55:35 -0700 | [diff] [blame] | 1095 | if (num_blocks != 0) |
| 1096 | range = num_blocks; |
| 1097 | else |
| 1098 | range = (dev->transport->get_blocks(dev) - lba); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 1099 | |
Andy Grover | 6708bb2 | 2011-06-08 10:36:43 -0700 | [diff] [blame] | 1100 | pr_debug("WRITE_SAME UNMAP: LBA: %llu Range: %llu\n", |
Nicholas Bellinger | dd3a5ad | 2011-05-06 17:55:35 -0700 | [diff] [blame] | 1101 | (unsigned long long)lba, (unsigned long long)range); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 1102 | |
| 1103 | ret = dev->transport->do_discard(dev, lba, range); |
| 1104 | if (ret < 0) { |
Andy Grover | 6708bb2 | 2011-06-08 10:36:43 -0700 | [diff] [blame] | 1105 | pr_debug("blkdev_issue_discard() failed for WRITE_SAME\n"); |
Andy Grover | e3d6f90 | 2011-07-19 08:55:10 +0000 | [diff] [blame] | 1106 | return ret; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 1107 | } |
| 1108 | |
Christoph Hellwig | 6bb35e0 | 2012-04-23 11:35:33 -0400 | [diff] [blame] | 1109 | target_complete_cmd(cmd, GOOD); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 1110 | return 0; |
| 1111 | } |
| 1112 | |
Christoph Hellwig | 6bb35e0 | 2012-04-23 11:35:33 -0400 | [diff] [blame] | 1113 | int target_emulate_synchronize_cache(struct se_cmd *cmd) |
Christoph Hellwig | 6ed5a55 | 2011-11-03 17:50:43 -0400 | [diff] [blame] | 1114 | { |
Christoph Hellwig | 6bb35e0 | 2012-04-23 11:35:33 -0400 | [diff] [blame] | 1115 | if (!cmd->se_dev->transport->do_sync_cache) { |
Christoph Hellwig | 6ed5a55 | 2011-11-03 17:50:43 -0400 | [diff] [blame] | 1116 | pr_err("SYNCHRONIZE_CACHE emulation not supported" |
Christoph Hellwig | 6bb35e0 | 2012-04-23 11:35:33 -0400 | [diff] [blame] | 1117 | " for: %s\n", cmd->se_dev->transport->name); |
Nicholas Bellinger | 03e98c9 | 2011-11-04 02:36:16 -0700 | [diff] [blame] | 1118 | cmd->scsi_sense_reason = TCM_UNSUPPORTED_SCSI_OPCODE; |
| 1119 | return -ENOSYS; |
Christoph Hellwig | 6ed5a55 | 2011-11-03 17:50:43 -0400 | [diff] [blame] | 1120 | } |
| 1121 | |
Christoph Hellwig | 6bb35e0 | 2012-04-23 11:35:33 -0400 | [diff] [blame] | 1122 | cmd->se_dev->transport->do_sync_cache(cmd); |
Christoph Hellwig | 6ed5a55 | 2011-11-03 17:50:43 -0400 | [diff] [blame] | 1123 | return 0; |
| 1124 | } |
| 1125 | |
Christoph Hellwig | 6bb35e0 | 2012-04-23 11:35:33 -0400 | [diff] [blame] | 1126 | int target_emulate_noop(struct se_cmd *cmd) |
Christoph Hellwig | d29a5b6 | 2011-11-03 17:50:44 -0400 | [diff] [blame] | 1127 | { |
Christoph Hellwig | 6bb35e0 | 2012-04-23 11:35:33 -0400 | [diff] [blame] | 1128 | target_complete_cmd(cmd, GOOD); |
Christoph Hellwig | d29a5b6 | 2011-11-03 17:50:44 -0400 | [diff] [blame] | 1129 | return 0; |
| 1130 | } |