1d6e0175cSChristoph Hellwig /* 2d6e0175cSChristoph Hellwig * SCSI Block Commands (SBC) parsing and emulation. 3d6e0175cSChristoph Hellwig * 44c76251eSNicholas Bellinger * (c) Copyright 2002-2013 Datera, Inc. 5d6e0175cSChristoph Hellwig * 6d6e0175cSChristoph Hellwig * Nicholas A. Bellinger <nab@kernel.org> 7d6e0175cSChristoph Hellwig * 8d6e0175cSChristoph Hellwig * This program is free software; you can redistribute it and/or modify 9d6e0175cSChristoph Hellwig * it under the terms of the GNU General Public License as published by 10d6e0175cSChristoph Hellwig * the Free Software Foundation; either version 2 of the License, or 11d6e0175cSChristoph Hellwig * (at your option) any later version. 12d6e0175cSChristoph Hellwig * 13d6e0175cSChristoph Hellwig * This program is distributed in the hope that it will be useful, 14d6e0175cSChristoph Hellwig * but WITHOUT ANY WARRANTY; without even the implied warranty of 15d6e0175cSChristoph Hellwig * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 16d6e0175cSChristoph Hellwig * GNU General Public License for more details. 17d6e0175cSChristoph Hellwig * 18d6e0175cSChristoph Hellwig * You should have received a copy of the GNU General Public License 19d6e0175cSChristoph Hellwig * along with this program; if not, write to the Free Software 20d6e0175cSChristoph Hellwig * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. 21d6e0175cSChristoph Hellwig */ 22d6e0175cSChristoph Hellwig 23d6e0175cSChristoph Hellwig #include <linux/kernel.h> 24d6e0175cSChristoph Hellwig #include <linux/module.h> 25d6e0175cSChristoph Hellwig #include <linux/ratelimit.h> 2641861fa8SNicholas Bellinger #include <linux/crc-t10dif.h> 27d6e0175cSChristoph Hellwig #include <asm/unaligned.h> 28d6e0175cSChristoph Hellwig #include <scsi/scsi.h> 2968ff9b9bSNicholas Bellinger #include <scsi/scsi_tcq.h> 30d6e0175cSChristoph Hellwig 31d6e0175cSChristoph Hellwig #include <target/target_core_base.h> 32d6e0175cSChristoph Hellwig #include <target/target_core_backend.h> 33d6e0175cSChristoph Hellwig #include <target/target_core_fabric.h> 34d6e0175cSChristoph Hellwig 35d6e0175cSChristoph Hellwig #include "target_core_internal.h" 36d6e0175cSChristoph Hellwig #include "target_core_ua.h" 37c66094bfSHannes Reinecke #include "target_core_alua.h" 38d6e0175cSChristoph Hellwig 39de103c93SChristoph Hellwig static sense_reason_t 40de103c93SChristoph Hellwig sbc_emulate_readcapacity(struct se_cmd *cmd) 411fd032eeSChristoph Hellwig { 421fd032eeSChristoph Hellwig struct se_device *dev = cmd->se_dev; 438dc8632aSRoland Dreier unsigned char *cdb = cmd->t_task_cdb; 441fd032eeSChristoph Hellwig unsigned long long blocks_long = dev->transport->get_blocks(dev); 45a50da144SPaolo Bonzini unsigned char *rbuf; 46a50da144SPaolo Bonzini unsigned char buf[8]; 471fd032eeSChristoph Hellwig u32 blocks; 481fd032eeSChristoph Hellwig 498dc8632aSRoland Dreier /* 508dc8632aSRoland Dreier * SBC-2 says: 518dc8632aSRoland Dreier * If the PMI bit is set to zero and the LOGICAL BLOCK 528dc8632aSRoland Dreier * ADDRESS field is not set to zero, the device server shall 538dc8632aSRoland Dreier * terminate the command with CHECK CONDITION status with 548dc8632aSRoland Dreier * the sense key set to ILLEGAL REQUEST and the additional 558dc8632aSRoland Dreier * sense code set to INVALID FIELD IN CDB. 568dc8632aSRoland Dreier * 578dc8632aSRoland Dreier * In SBC-3, these fields are obsolete, but some SCSI 588dc8632aSRoland Dreier * compliance tests actually check this, so we might as well 598dc8632aSRoland Dreier * follow SBC-2. 608dc8632aSRoland Dreier */ 618dc8632aSRoland Dreier if (!(cdb[8] & 1) && !!(cdb[2] | cdb[3] | cdb[4] | cdb[5])) 628dc8632aSRoland Dreier return TCM_INVALID_CDB_FIELD; 638dc8632aSRoland Dreier 641fd032eeSChristoph Hellwig if (blocks_long >= 0x00000000ffffffff) 651fd032eeSChristoph Hellwig blocks = 0xffffffff; 661fd032eeSChristoph Hellwig else 671fd032eeSChristoph Hellwig blocks = (u32)blocks_long; 681fd032eeSChristoph Hellwig 691fd032eeSChristoph Hellwig buf[0] = (blocks >> 24) & 0xff; 701fd032eeSChristoph Hellwig buf[1] = (blocks >> 16) & 0xff; 711fd032eeSChristoph Hellwig buf[2] = (blocks >> 8) & 0xff; 721fd032eeSChristoph Hellwig buf[3] = blocks & 0xff; 730fd97ccfSChristoph Hellwig buf[4] = (dev->dev_attrib.block_size >> 24) & 0xff; 740fd97ccfSChristoph Hellwig buf[5] = (dev->dev_attrib.block_size >> 16) & 0xff; 750fd97ccfSChristoph Hellwig buf[6] = (dev->dev_attrib.block_size >> 8) & 0xff; 760fd97ccfSChristoph Hellwig buf[7] = dev->dev_attrib.block_size & 0xff; 771fd032eeSChristoph Hellwig 78a50da144SPaolo Bonzini rbuf = transport_kmap_data_sg(cmd); 798b4b0dcbSNicholas Bellinger if (rbuf) { 80a50da144SPaolo Bonzini memcpy(rbuf, buf, min_t(u32, sizeof(buf), cmd->data_length)); 811fd032eeSChristoph Hellwig transport_kunmap_data_sg(cmd); 828b4b0dcbSNicholas Bellinger } 831fd032eeSChristoph Hellwig 841fd032eeSChristoph Hellwig target_complete_cmd(cmd, GOOD); 851fd032eeSChristoph Hellwig return 0; 861fd032eeSChristoph Hellwig } 871fd032eeSChristoph Hellwig 88de103c93SChristoph Hellwig static sense_reason_t 89de103c93SChristoph Hellwig sbc_emulate_readcapacity_16(struct se_cmd *cmd) 901fd032eeSChristoph Hellwig { 911fd032eeSChristoph Hellwig struct se_device *dev = cmd->se_dev; 922d335983SNicholas Bellinger struct se_session *sess = cmd->se_sess; 93a50da144SPaolo Bonzini unsigned char *rbuf; 94a50da144SPaolo Bonzini unsigned char buf[32]; 951fd032eeSChristoph Hellwig unsigned long long blocks = dev->transport->get_blocks(dev); 961fd032eeSChristoph Hellwig 97a50da144SPaolo Bonzini memset(buf, 0, sizeof(buf)); 981fd032eeSChristoph Hellwig buf[0] = (blocks >> 56) & 0xff; 991fd032eeSChristoph Hellwig buf[1] = (blocks >> 48) & 0xff; 1001fd032eeSChristoph Hellwig buf[2] = (blocks >> 40) & 0xff; 1011fd032eeSChristoph Hellwig buf[3] = (blocks >> 32) & 0xff; 1021fd032eeSChristoph Hellwig buf[4] = (blocks >> 24) & 0xff; 1031fd032eeSChristoph Hellwig buf[5] = (blocks >> 16) & 0xff; 1041fd032eeSChristoph Hellwig buf[6] = (blocks >> 8) & 0xff; 1051fd032eeSChristoph Hellwig buf[7] = blocks & 0xff; 1060fd97ccfSChristoph Hellwig buf[8] = (dev->dev_attrib.block_size >> 24) & 0xff; 1070fd97ccfSChristoph Hellwig buf[9] = (dev->dev_attrib.block_size >> 16) & 0xff; 1080fd97ccfSChristoph Hellwig buf[10] = (dev->dev_attrib.block_size >> 8) & 0xff; 1090fd97ccfSChristoph Hellwig buf[11] = dev->dev_attrib.block_size & 0xff; 11056dac14cSNicholas Bellinger /* 11156dac14cSNicholas Bellinger * Set P_TYPE and PROT_EN bits for DIF support 11256dac14cSNicholas Bellinger */ 1132d335983SNicholas Bellinger if (sess->sup_prot_ops & (TARGET_PROT_DIN_PASS | TARGET_PROT_DOUT_PASS)) { 11456dac14cSNicholas Bellinger if (dev->dev_attrib.pi_prot_type) 11556dac14cSNicholas Bellinger buf[12] = (dev->dev_attrib.pi_prot_type - 1) << 1 | 0x1; 1162d335983SNicholas Bellinger } 1177f7caf6aSAndy Grover 1187f7caf6aSAndy Grover if (dev->transport->get_lbppbe) 1197f7caf6aSAndy Grover buf[13] = dev->transport->get_lbppbe(dev) & 0x0f; 1207f7caf6aSAndy Grover 1217f7caf6aSAndy Grover if (dev->transport->get_alignment_offset_lbas) { 1227f7caf6aSAndy Grover u16 lalba = dev->transport->get_alignment_offset_lbas(dev); 1237f7caf6aSAndy Grover buf[14] = (lalba >> 8) & 0x3f; 1247f7caf6aSAndy Grover buf[15] = lalba & 0xff; 1257f7caf6aSAndy Grover } 1267f7caf6aSAndy Grover 1271fd032eeSChristoph Hellwig /* 1281fd032eeSChristoph Hellwig * Set Thin Provisioning Enable bit following sbc3r22 in section 1291fd032eeSChristoph Hellwig * READ CAPACITY (16) byte 14 if emulate_tpu or emulate_tpws is enabled. 1301fd032eeSChristoph Hellwig */ 1310fd97ccfSChristoph Hellwig if (dev->dev_attrib.emulate_tpu || dev->dev_attrib.emulate_tpws) 1327f7caf6aSAndy Grover buf[14] |= 0x80; 1331fd032eeSChristoph Hellwig 134a50da144SPaolo Bonzini rbuf = transport_kmap_data_sg(cmd); 1358b4b0dcbSNicholas Bellinger if (rbuf) { 136a50da144SPaolo Bonzini memcpy(rbuf, buf, min_t(u32, sizeof(buf), cmd->data_length)); 1371fd032eeSChristoph Hellwig transport_kunmap_data_sg(cmd); 1388b4b0dcbSNicholas Bellinger } 1391fd032eeSChristoph Hellwig 1401fd032eeSChristoph Hellwig target_complete_cmd(cmd, GOOD); 1411fd032eeSChristoph Hellwig return 0; 1421fd032eeSChristoph Hellwig } 1431fd032eeSChristoph Hellwig 144972b29c8SRoland Dreier sector_t sbc_get_write_same_sectors(struct se_cmd *cmd) 1451fd032eeSChristoph Hellwig { 1461fd032eeSChristoph Hellwig u32 num_blocks; 1471fd032eeSChristoph Hellwig 1481fd032eeSChristoph Hellwig if (cmd->t_task_cdb[0] == WRITE_SAME) 1491fd032eeSChristoph Hellwig num_blocks = get_unaligned_be16(&cmd->t_task_cdb[7]); 1501fd032eeSChristoph Hellwig else if (cmd->t_task_cdb[0] == WRITE_SAME_16) 1511fd032eeSChristoph Hellwig num_blocks = get_unaligned_be32(&cmd->t_task_cdb[10]); 1521fd032eeSChristoph Hellwig else /* WRITE_SAME_32 via VARIABLE_LENGTH_CMD */ 1531fd032eeSChristoph Hellwig num_blocks = get_unaligned_be32(&cmd->t_task_cdb[28]); 1541fd032eeSChristoph Hellwig 1551fd032eeSChristoph Hellwig /* 1561fd032eeSChristoph Hellwig * Use the explicit range when non zero is supplied, otherwise calculate 1571fd032eeSChristoph Hellwig * the remaining range based on ->get_blocks() - starting LBA. 1581fd032eeSChristoph Hellwig */ 1596f974e8cSChristoph Hellwig if (num_blocks) 1606f974e8cSChristoph Hellwig return num_blocks; 1611fd032eeSChristoph Hellwig 1626f974e8cSChristoph Hellwig return cmd->se_dev->transport->get_blocks(cmd->se_dev) - 1636f974e8cSChristoph Hellwig cmd->t_task_lba + 1; 1641fd032eeSChristoph Hellwig } 165972b29c8SRoland Dreier EXPORT_SYMBOL(sbc_get_write_same_sectors); 1661fd032eeSChristoph Hellwig 167de103c93SChristoph Hellwig static sense_reason_t 1681920ed61SNicholas Bellinger sbc_emulate_noop(struct se_cmd *cmd) 1691a1ff38cSBernhard Kohl { 1701a1ff38cSBernhard Kohl target_complete_cmd(cmd, GOOD); 1711a1ff38cSBernhard Kohl return 0; 1721a1ff38cSBernhard Kohl } 1731a1ff38cSBernhard Kohl 174d6e0175cSChristoph Hellwig static inline u32 sbc_get_size(struct se_cmd *cmd, u32 sectors) 175d6e0175cSChristoph Hellwig { 1760fd97ccfSChristoph Hellwig return cmd->se_dev->dev_attrib.block_size * sectors; 177d6e0175cSChristoph Hellwig } 178d6e0175cSChristoph Hellwig 179d6e0175cSChristoph Hellwig static int sbc_check_valid_sectors(struct se_cmd *cmd) 180d6e0175cSChristoph Hellwig { 181d6e0175cSChristoph Hellwig struct se_device *dev = cmd->se_dev; 182d6e0175cSChristoph Hellwig unsigned long long end_lba; 183d6e0175cSChristoph Hellwig u32 sectors; 184d6e0175cSChristoph Hellwig 1850fd97ccfSChristoph Hellwig sectors = cmd->data_length / dev->dev_attrib.block_size; 186d6e0175cSChristoph Hellwig end_lba = dev->transport->get_blocks(dev) + 1; 187d6e0175cSChristoph Hellwig 188d6e0175cSChristoph Hellwig if (cmd->t_task_lba + sectors > end_lba) { 189d6e0175cSChristoph Hellwig pr_err("target: lba %llu, sectors %u exceeds end lba %llu\n", 190d6e0175cSChristoph Hellwig cmd->t_task_lba, sectors, end_lba); 191d6e0175cSChristoph Hellwig return -EINVAL; 192d6e0175cSChristoph Hellwig } 193d6e0175cSChristoph Hellwig 194d6e0175cSChristoph Hellwig return 0; 195d6e0175cSChristoph Hellwig } 196d6e0175cSChristoph Hellwig 197d6e0175cSChristoph Hellwig static inline u32 transport_get_sectors_6(unsigned char *cdb) 198d6e0175cSChristoph Hellwig { 199d6e0175cSChristoph Hellwig /* 200d6e0175cSChristoph Hellwig * Use 8-bit sector value. SBC-3 says: 201d6e0175cSChristoph Hellwig * 202d6e0175cSChristoph Hellwig * A TRANSFER LENGTH field set to zero specifies that 256 203d6e0175cSChristoph Hellwig * logical blocks shall be written. Any other value 204d6e0175cSChristoph Hellwig * specifies the number of logical blocks that shall be 205d6e0175cSChristoph Hellwig * written. 206d6e0175cSChristoph Hellwig */ 207d6e0175cSChristoph Hellwig return cdb[4] ? : 256; 208d6e0175cSChristoph Hellwig } 209d6e0175cSChristoph Hellwig 210d6e0175cSChristoph Hellwig static inline u32 transport_get_sectors_10(unsigned char *cdb) 211d6e0175cSChristoph Hellwig { 212d6e0175cSChristoph Hellwig return (u32)(cdb[7] << 8) + cdb[8]; 213d6e0175cSChristoph Hellwig } 214d6e0175cSChristoph Hellwig 215d6e0175cSChristoph Hellwig static inline u32 transport_get_sectors_12(unsigned char *cdb) 216d6e0175cSChristoph Hellwig { 217d6e0175cSChristoph Hellwig return (u32)(cdb[6] << 24) + (cdb[7] << 16) + (cdb[8] << 8) + cdb[9]; 218d6e0175cSChristoph Hellwig } 219d6e0175cSChristoph Hellwig 220d6e0175cSChristoph Hellwig static inline u32 transport_get_sectors_16(unsigned char *cdb) 221d6e0175cSChristoph Hellwig { 222d6e0175cSChristoph Hellwig return (u32)(cdb[10] << 24) + (cdb[11] << 16) + 223d6e0175cSChristoph Hellwig (cdb[12] << 8) + cdb[13]; 224d6e0175cSChristoph Hellwig } 225d6e0175cSChristoph Hellwig 226d6e0175cSChristoph Hellwig /* 227d6e0175cSChristoph Hellwig * Used for VARIABLE_LENGTH_CDB WRITE_32 and READ_32 variants 228d6e0175cSChristoph Hellwig */ 229d6e0175cSChristoph Hellwig static inline u32 transport_get_sectors_32(unsigned char *cdb) 230d6e0175cSChristoph Hellwig { 231d6e0175cSChristoph Hellwig return (u32)(cdb[28] << 24) + (cdb[29] << 16) + 232d6e0175cSChristoph Hellwig (cdb[30] << 8) + cdb[31]; 233d6e0175cSChristoph Hellwig 234d6e0175cSChristoph Hellwig } 235d6e0175cSChristoph Hellwig 236d6e0175cSChristoph Hellwig static inline u32 transport_lba_21(unsigned char *cdb) 237d6e0175cSChristoph Hellwig { 238d6e0175cSChristoph Hellwig return ((cdb[1] & 0x1f) << 16) | (cdb[2] << 8) | cdb[3]; 239d6e0175cSChristoph Hellwig } 240d6e0175cSChristoph Hellwig 241d6e0175cSChristoph Hellwig static inline u32 transport_lba_32(unsigned char *cdb) 242d6e0175cSChristoph Hellwig { 243d6e0175cSChristoph Hellwig return (cdb[2] << 24) | (cdb[3] << 16) | (cdb[4] << 8) | cdb[5]; 244d6e0175cSChristoph Hellwig } 245d6e0175cSChristoph Hellwig 246d6e0175cSChristoph Hellwig static inline unsigned long long transport_lba_64(unsigned char *cdb) 247d6e0175cSChristoph Hellwig { 248d6e0175cSChristoph Hellwig unsigned int __v1, __v2; 249d6e0175cSChristoph Hellwig 250d6e0175cSChristoph Hellwig __v1 = (cdb[2] << 24) | (cdb[3] << 16) | (cdb[4] << 8) | cdb[5]; 251d6e0175cSChristoph Hellwig __v2 = (cdb[6] << 24) | (cdb[7] << 16) | (cdb[8] << 8) | cdb[9]; 252d6e0175cSChristoph Hellwig 253d6e0175cSChristoph Hellwig return ((unsigned long long)__v2) | (unsigned long long)__v1 << 32; 254d6e0175cSChristoph Hellwig } 255d6e0175cSChristoph Hellwig 256d6e0175cSChristoph Hellwig /* 257d6e0175cSChristoph Hellwig * For VARIABLE_LENGTH_CDB w/ 32 byte extended CDBs 258d6e0175cSChristoph Hellwig */ 259d6e0175cSChristoph Hellwig static inline unsigned long long transport_lba_64_ext(unsigned char *cdb) 260d6e0175cSChristoph Hellwig { 261d6e0175cSChristoph Hellwig unsigned int __v1, __v2; 262d6e0175cSChristoph Hellwig 263d6e0175cSChristoph Hellwig __v1 = (cdb[12] << 24) | (cdb[13] << 16) | (cdb[14] << 8) | cdb[15]; 264d6e0175cSChristoph Hellwig __v2 = (cdb[16] << 24) | (cdb[17] << 16) | (cdb[18] << 8) | cdb[19]; 265d6e0175cSChristoph Hellwig 266d6e0175cSChristoph Hellwig return ((unsigned long long)__v2) | (unsigned long long)__v1 << 32; 267d6e0175cSChristoph Hellwig } 268d6e0175cSChristoph Hellwig 269cd063befSNicholas Bellinger static sense_reason_t 270cd063befSNicholas Bellinger sbc_setup_write_same(struct se_cmd *cmd, unsigned char *flags, struct sbc_ops *ops) 271d6e0175cSChristoph Hellwig { 272972b29c8SRoland Dreier unsigned int sectors = sbc_get_write_same_sectors(cmd); 273773cbaf7SNicholas Bellinger 274d6e0175cSChristoph Hellwig if ((flags[0] & 0x04) || (flags[0] & 0x02)) { 275d6e0175cSChristoph Hellwig pr_err("WRITE_SAME PBDATA and LBDATA" 276d6e0175cSChristoph Hellwig " bits not supported for Block Discard" 277d6e0175cSChristoph Hellwig " Emulation\n"); 278cd063befSNicholas Bellinger return TCM_UNSUPPORTED_SCSI_OPCODE; 279d6e0175cSChristoph Hellwig } 280773cbaf7SNicholas Bellinger if (sectors > cmd->se_dev->dev_attrib.max_write_same_len) { 281773cbaf7SNicholas Bellinger pr_warn("WRITE_SAME sectors: %u exceeds max_write_same_len: %u\n", 282773cbaf7SNicholas Bellinger sectors, cmd->se_dev->dev_attrib.max_write_same_len); 283773cbaf7SNicholas Bellinger return TCM_INVALID_CDB_FIELD; 284773cbaf7SNicholas Bellinger } 2855cb770bfSRoland Dreier /* We always have ANC_SUP == 0 so setting ANCHOR is always an error */ 2865cb770bfSRoland Dreier if (flags[0] & 0x10) { 2875cb770bfSRoland Dreier pr_warn("WRITE SAME with ANCHOR not supported\n"); 2885cb770bfSRoland Dreier return TCM_INVALID_CDB_FIELD; 2895cb770bfSRoland Dreier } 290d6e0175cSChristoph Hellwig /* 291cd063befSNicholas Bellinger * Special case for WRITE_SAME w/ UNMAP=1 that ends up getting 292cd063befSNicholas Bellinger * translated into block discard requests within backend code. 293d6e0175cSChristoph Hellwig */ 294cd063befSNicholas Bellinger if (flags[0] & 0x08) { 295cd063befSNicholas Bellinger if (!ops->execute_write_same_unmap) 296cd063befSNicholas Bellinger return TCM_UNSUPPORTED_SCSI_OPCODE; 297d6e0175cSChristoph Hellwig 298cd063befSNicholas Bellinger cmd->execute_cmd = ops->execute_write_same_unmap; 299cd063befSNicholas Bellinger return 0; 300cd063befSNicholas Bellinger } 301cd063befSNicholas Bellinger if (!ops->execute_write_same) 302cd063befSNicholas Bellinger return TCM_UNSUPPORTED_SCSI_OPCODE; 303cd063befSNicholas Bellinger 304cd063befSNicholas Bellinger cmd->execute_cmd = ops->execute_write_same; 305d6e0175cSChristoph Hellwig return 0; 306d6e0175cSChristoph Hellwig } 307d6e0175cSChristoph Hellwig 308a6b0133cSNicholas Bellinger static sense_reason_t xdreadwrite_callback(struct se_cmd *cmd) 309d6e0175cSChristoph Hellwig { 310d6e0175cSChristoph Hellwig unsigned char *buf, *addr; 311d6e0175cSChristoph Hellwig struct scatterlist *sg; 312d6e0175cSChristoph Hellwig unsigned int offset; 313a6b0133cSNicholas Bellinger sense_reason_t ret = TCM_NO_SENSE; 314a6b0133cSNicholas Bellinger int i, count; 315d6e0175cSChristoph Hellwig /* 316d6e0175cSChristoph Hellwig * From sbc3r22.pdf section 5.48 XDWRITEREAD (10) command 317d6e0175cSChristoph Hellwig * 318d6e0175cSChristoph Hellwig * 1) read the specified logical block(s); 319d6e0175cSChristoph Hellwig * 2) transfer logical blocks from the data-out buffer; 320d6e0175cSChristoph Hellwig * 3) XOR the logical blocks transferred from the data-out buffer with 321d6e0175cSChristoph Hellwig * the logical blocks read, storing the resulting XOR data in a buffer; 322d6e0175cSChristoph Hellwig * 4) if the DISABLE WRITE bit is set to zero, then write the logical 323d6e0175cSChristoph Hellwig * blocks transferred from the data-out buffer; and 324d6e0175cSChristoph Hellwig * 5) transfer the resulting XOR data to the data-in buffer. 325d6e0175cSChristoph Hellwig */ 326d6e0175cSChristoph Hellwig buf = kmalloc(cmd->data_length, GFP_KERNEL); 327d6e0175cSChristoph Hellwig if (!buf) { 328d6e0175cSChristoph Hellwig pr_err("Unable to allocate xor_callback buf\n"); 329a6b0133cSNicholas Bellinger return TCM_OUT_OF_RESOURCES; 330d6e0175cSChristoph Hellwig } 331d6e0175cSChristoph Hellwig /* 332d6e0175cSChristoph Hellwig * Copy the scatterlist WRITE buffer located at cmd->t_data_sg 333d6e0175cSChristoph Hellwig * into the locally allocated *buf 334d6e0175cSChristoph Hellwig */ 335d6e0175cSChristoph Hellwig sg_copy_to_buffer(cmd->t_data_sg, 336d6e0175cSChristoph Hellwig cmd->t_data_nents, 337d6e0175cSChristoph Hellwig buf, 338d6e0175cSChristoph Hellwig cmd->data_length); 339d6e0175cSChristoph Hellwig 340d6e0175cSChristoph Hellwig /* 341d6e0175cSChristoph Hellwig * Now perform the XOR against the BIDI read memory located at 342d6e0175cSChristoph Hellwig * cmd->t_mem_bidi_list 343d6e0175cSChristoph Hellwig */ 344d6e0175cSChristoph Hellwig 345d6e0175cSChristoph Hellwig offset = 0; 346d6e0175cSChristoph Hellwig for_each_sg(cmd->t_bidi_data_sg, sg, cmd->t_bidi_data_nents, count) { 347d6e0175cSChristoph Hellwig addr = kmap_atomic(sg_page(sg)); 348a6b0133cSNicholas Bellinger if (!addr) { 349a6b0133cSNicholas Bellinger ret = TCM_OUT_OF_RESOURCES; 350d6e0175cSChristoph Hellwig goto out; 351a6b0133cSNicholas Bellinger } 352d6e0175cSChristoph Hellwig 353d6e0175cSChristoph Hellwig for (i = 0; i < sg->length; i++) 354d6e0175cSChristoph Hellwig *(addr + sg->offset + i) ^= *(buf + offset + i); 355d6e0175cSChristoph Hellwig 356d6e0175cSChristoph Hellwig offset += sg->length; 357d6e0175cSChristoph Hellwig kunmap_atomic(addr); 358d6e0175cSChristoph Hellwig } 359d6e0175cSChristoph Hellwig 360d6e0175cSChristoph Hellwig out: 361d6e0175cSChristoph Hellwig kfree(buf); 362a6b0133cSNicholas Bellinger return ret; 363d6e0175cSChristoph Hellwig } 364d6e0175cSChristoph Hellwig 365a82a9538SNicholas Bellinger static sense_reason_t 366a82a9538SNicholas Bellinger sbc_execute_rw(struct se_cmd *cmd) 367a82a9538SNicholas Bellinger { 368a82a9538SNicholas Bellinger return cmd->execute_rw(cmd, cmd->t_data_sg, cmd->t_data_nents, 369a82a9538SNicholas Bellinger cmd->data_direction); 370a82a9538SNicholas Bellinger } 371a82a9538SNicholas Bellinger 37268ff9b9bSNicholas Bellinger static sense_reason_t compare_and_write_post(struct se_cmd *cmd) 37368ff9b9bSNicholas Bellinger { 37468ff9b9bSNicholas Bellinger struct se_device *dev = cmd->se_dev; 37568ff9b9bSNicholas Bellinger 376d8855c15SNicholas Bellinger /* 377d8855c15SNicholas Bellinger * Only set SCF_COMPARE_AND_WRITE_POST to force a response fall-through 378d8855c15SNicholas Bellinger * within target_complete_ok_work() if the command was successfully 379d8855c15SNicholas Bellinger * sent to the backend driver. 380d8855c15SNicholas Bellinger */ 381d8855c15SNicholas Bellinger spin_lock_irq(&cmd->t_state_lock); 382d8855c15SNicholas Bellinger if ((cmd->transport_state & CMD_T_SENT) && !cmd->scsi_status) 38368ff9b9bSNicholas Bellinger cmd->se_cmd_flags |= SCF_COMPARE_AND_WRITE_POST; 384d8855c15SNicholas Bellinger spin_unlock_irq(&cmd->t_state_lock); 385d8855c15SNicholas Bellinger 38668ff9b9bSNicholas Bellinger /* 38768ff9b9bSNicholas Bellinger * Unlock ->caw_sem originally obtained during sbc_compare_and_write() 38868ff9b9bSNicholas Bellinger * before the original READ I/O submission. 38968ff9b9bSNicholas Bellinger */ 39068ff9b9bSNicholas Bellinger up(&dev->caw_sem); 39168ff9b9bSNicholas Bellinger 39268ff9b9bSNicholas Bellinger return TCM_NO_SENSE; 39368ff9b9bSNicholas Bellinger } 39468ff9b9bSNicholas Bellinger 39568ff9b9bSNicholas Bellinger static sense_reason_t compare_and_write_callback(struct se_cmd *cmd) 39668ff9b9bSNicholas Bellinger { 39768ff9b9bSNicholas Bellinger struct se_device *dev = cmd->se_dev; 39868ff9b9bSNicholas Bellinger struct scatterlist *write_sg = NULL, *sg; 399db60df88SNicholas Bellinger unsigned char *buf = NULL, *addr; 40068ff9b9bSNicholas Bellinger struct sg_mapping_iter m; 40168ff9b9bSNicholas Bellinger unsigned int offset = 0, len; 40268ff9b9bSNicholas Bellinger unsigned int nlbas = cmd->t_task_nolb; 40368ff9b9bSNicholas Bellinger unsigned int block_size = dev->dev_attrib.block_size; 40468ff9b9bSNicholas Bellinger unsigned int compare_len = (nlbas * block_size); 40568ff9b9bSNicholas Bellinger sense_reason_t ret = TCM_NO_SENSE; 40668ff9b9bSNicholas Bellinger int rc, i; 40768ff9b9bSNicholas Bellinger 408cf6d1f09SNicholas Bellinger /* 409cf6d1f09SNicholas Bellinger * Handle early failure in transport_generic_request_failure(), 410cf6d1f09SNicholas Bellinger * which will not have taken ->caw_mutex yet.. 411cf6d1f09SNicholas Bellinger */ 412cf6d1f09SNicholas Bellinger if (!cmd->t_data_sg || !cmd->t_bidi_data_sg) 413cf6d1f09SNicholas Bellinger return TCM_NO_SENSE; 414db60df88SNicholas Bellinger /* 415db60df88SNicholas Bellinger * Immediately exit + release dev->caw_sem if command has already 416db60df88SNicholas Bellinger * been failed with a non-zero SCSI status. 417db60df88SNicholas Bellinger */ 418db60df88SNicholas Bellinger if (cmd->scsi_status) { 419db60df88SNicholas Bellinger pr_err("compare_and_write_callback: non zero scsi_status:" 420db60df88SNicholas Bellinger " 0x%02x\n", cmd->scsi_status); 421db60df88SNicholas Bellinger goto out; 422db60df88SNicholas Bellinger } 423cf6d1f09SNicholas Bellinger 42468ff9b9bSNicholas Bellinger buf = kzalloc(cmd->data_length, GFP_KERNEL); 42568ff9b9bSNicholas Bellinger if (!buf) { 42668ff9b9bSNicholas Bellinger pr_err("Unable to allocate compare_and_write buf\n"); 427a2890087SNicholas Bellinger ret = TCM_OUT_OF_RESOURCES; 428a2890087SNicholas Bellinger goto out; 42968ff9b9bSNicholas Bellinger } 43068ff9b9bSNicholas Bellinger 431a1e1774cSMartin Svec write_sg = kmalloc(sizeof(struct scatterlist) * cmd->t_data_nents, 43268ff9b9bSNicholas Bellinger GFP_KERNEL); 43368ff9b9bSNicholas Bellinger if (!write_sg) { 43468ff9b9bSNicholas Bellinger pr_err("Unable to allocate compare_and_write sg\n"); 43568ff9b9bSNicholas Bellinger ret = TCM_OUT_OF_RESOURCES; 43668ff9b9bSNicholas Bellinger goto out; 43768ff9b9bSNicholas Bellinger } 438a1e1774cSMartin Svec sg_init_table(write_sg, cmd->t_data_nents); 43968ff9b9bSNicholas Bellinger /* 44068ff9b9bSNicholas Bellinger * Setup verify and write data payloads from total NumberLBAs. 44168ff9b9bSNicholas Bellinger */ 44268ff9b9bSNicholas Bellinger rc = sg_copy_to_buffer(cmd->t_data_sg, cmd->t_data_nents, buf, 44368ff9b9bSNicholas Bellinger cmd->data_length); 44468ff9b9bSNicholas Bellinger if (!rc) { 44568ff9b9bSNicholas Bellinger pr_err("sg_copy_to_buffer() failed for compare_and_write\n"); 44668ff9b9bSNicholas Bellinger ret = TCM_OUT_OF_RESOURCES; 44768ff9b9bSNicholas Bellinger goto out; 44868ff9b9bSNicholas Bellinger } 44968ff9b9bSNicholas Bellinger /* 45068ff9b9bSNicholas Bellinger * Compare against SCSI READ payload against verify payload 45168ff9b9bSNicholas Bellinger */ 45268ff9b9bSNicholas Bellinger for_each_sg(cmd->t_bidi_data_sg, sg, cmd->t_bidi_data_nents, i) { 45368ff9b9bSNicholas Bellinger addr = (unsigned char *)kmap_atomic(sg_page(sg)); 45468ff9b9bSNicholas Bellinger if (!addr) { 45568ff9b9bSNicholas Bellinger ret = TCM_OUT_OF_RESOURCES; 45668ff9b9bSNicholas Bellinger goto out; 45768ff9b9bSNicholas Bellinger } 45868ff9b9bSNicholas Bellinger 45968ff9b9bSNicholas Bellinger len = min(sg->length, compare_len); 46068ff9b9bSNicholas Bellinger 46168ff9b9bSNicholas Bellinger if (memcmp(addr, buf + offset, len)) { 46268ff9b9bSNicholas Bellinger pr_warn("Detected MISCOMPARE for addr: %p buf: %p\n", 46368ff9b9bSNicholas Bellinger addr, buf + offset); 46468ff9b9bSNicholas Bellinger kunmap_atomic(addr); 46568ff9b9bSNicholas Bellinger goto miscompare; 46668ff9b9bSNicholas Bellinger } 46768ff9b9bSNicholas Bellinger kunmap_atomic(addr); 46868ff9b9bSNicholas Bellinger 46968ff9b9bSNicholas Bellinger offset += len; 47068ff9b9bSNicholas Bellinger compare_len -= len; 47168ff9b9bSNicholas Bellinger if (!compare_len) 47268ff9b9bSNicholas Bellinger break; 47368ff9b9bSNicholas Bellinger } 47468ff9b9bSNicholas Bellinger 47568ff9b9bSNicholas Bellinger i = 0; 47668ff9b9bSNicholas Bellinger len = cmd->t_task_nolb * block_size; 47768ff9b9bSNicholas Bellinger sg_miter_start(&m, cmd->t_data_sg, cmd->t_data_nents, SG_MITER_TO_SG); 47868ff9b9bSNicholas Bellinger /* 47968ff9b9bSNicholas Bellinger * Currently assumes NoLB=1 and SGLs are PAGE_SIZE.. 48068ff9b9bSNicholas Bellinger */ 48168ff9b9bSNicholas Bellinger while (len) { 48268ff9b9bSNicholas Bellinger sg_miter_next(&m); 48368ff9b9bSNicholas Bellinger 48468ff9b9bSNicholas Bellinger if (block_size < PAGE_SIZE) { 48568ff9b9bSNicholas Bellinger sg_set_page(&write_sg[i], m.page, block_size, 48668ff9b9bSNicholas Bellinger block_size); 48768ff9b9bSNicholas Bellinger } else { 48868ff9b9bSNicholas Bellinger sg_miter_next(&m); 48968ff9b9bSNicholas Bellinger sg_set_page(&write_sg[i], m.page, block_size, 49068ff9b9bSNicholas Bellinger 0); 49168ff9b9bSNicholas Bellinger } 49268ff9b9bSNicholas Bellinger len -= block_size; 49368ff9b9bSNicholas Bellinger i++; 49468ff9b9bSNicholas Bellinger } 49568ff9b9bSNicholas Bellinger sg_miter_stop(&m); 49668ff9b9bSNicholas Bellinger /* 49768ff9b9bSNicholas Bellinger * Save the original SGL + nents values before updating to new 49868ff9b9bSNicholas Bellinger * assignments, to be released in transport_free_pages() -> 49968ff9b9bSNicholas Bellinger * transport_reset_sgl_orig() 50068ff9b9bSNicholas Bellinger */ 50168ff9b9bSNicholas Bellinger cmd->t_data_sg_orig = cmd->t_data_sg; 50268ff9b9bSNicholas Bellinger cmd->t_data_sg = write_sg; 50368ff9b9bSNicholas Bellinger cmd->t_data_nents_orig = cmd->t_data_nents; 50468ff9b9bSNicholas Bellinger cmd->t_data_nents = 1; 50568ff9b9bSNicholas Bellinger 50668ff9b9bSNicholas Bellinger cmd->sam_task_attr = MSG_HEAD_TAG; 50768ff9b9bSNicholas Bellinger cmd->transport_complete_callback = compare_and_write_post; 50868ff9b9bSNicholas Bellinger /* 50968ff9b9bSNicholas Bellinger * Now reset ->execute_cmd() to the normal sbc_execute_rw() handler 51068ff9b9bSNicholas Bellinger * for submitting the adjusted SGL to write instance user-data. 51168ff9b9bSNicholas Bellinger */ 51268ff9b9bSNicholas Bellinger cmd->execute_cmd = sbc_execute_rw; 51368ff9b9bSNicholas Bellinger 51468ff9b9bSNicholas Bellinger spin_lock_irq(&cmd->t_state_lock); 51568ff9b9bSNicholas Bellinger cmd->t_state = TRANSPORT_PROCESSING; 51668ff9b9bSNicholas Bellinger cmd->transport_state |= CMD_T_ACTIVE|CMD_T_BUSY|CMD_T_SENT; 51768ff9b9bSNicholas Bellinger spin_unlock_irq(&cmd->t_state_lock); 51868ff9b9bSNicholas Bellinger 51968ff9b9bSNicholas Bellinger __target_execute_cmd(cmd); 52068ff9b9bSNicholas Bellinger 52168ff9b9bSNicholas Bellinger kfree(buf); 52268ff9b9bSNicholas Bellinger return ret; 52368ff9b9bSNicholas Bellinger 52468ff9b9bSNicholas Bellinger miscompare: 52568ff9b9bSNicholas Bellinger pr_warn("Target/%s: Send MISCOMPARE check condition and sense\n", 52668ff9b9bSNicholas Bellinger dev->transport->name); 52768ff9b9bSNicholas Bellinger ret = TCM_MISCOMPARE_VERIFY; 52868ff9b9bSNicholas Bellinger out: 52968ff9b9bSNicholas Bellinger /* 53068ff9b9bSNicholas Bellinger * In the MISCOMPARE or failure case, unlock ->caw_sem obtained in 53168ff9b9bSNicholas Bellinger * sbc_compare_and_write() before the original READ I/O submission. 53268ff9b9bSNicholas Bellinger */ 53368ff9b9bSNicholas Bellinger up(&dev->caw_sem); 53468ff9b9bSNicholas Bellinger kfree(write_sg); 53568ff9b9bSNicholas Bellinger kfree(buf); 53668ff9b9bSNicholas Bellinger return ret; 53768ff9b9bSNicholas Bellinger } 53868ff9b9bSNicholas Bellinger 53968ff9b9bSNicholas Bellinger static sense_reason_t 54068ff9b9bSNicholas Bellinger sbc_compare_and_write(struct se_cmd *cmd) 54168ff9b9bSNicholas Bellinger { 54268ff9b9bSNicholas Bellinger struct se_device *dev = cmd->se_dev; 54368ff9b9bSNicholas Bellinger sense_reason_t ret; 54468ff9b9bSNicholas Bellinger int rc; 54568ff9b9bSNicholas Bellinger /* 54668ff9b9bSNicholas Bellinger * Submit the READ first for COMPARE_AND_WRITE to perform the 54768ff9b9bSNicholas Bellinger * comparision using SGLs at cmd->t_bidi_data_sg.. 54868ff9b9bSNicholas Bellinger */ 54968ff9b9bSNicholas Bellinger rc = down_interruptible(&dev->caw_sem); 55068ff9b9bSNicholas Bellinger if ((rc != 0) || signal_pending(current)) { 55168ff9b9bSNicholas Bellinger cmd->transport_complete_callback = NULL; 55268ff9b9bSNicholas Bellinger return TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; 55368ff9b9bSNicholas Bellinger } 554b7191253SNicholas Bellinger /* 555b7191253SNicholas Bellinger * Reset cmd->data_length to individual block_size in order to not 556b7191253SNicholas Bellinger * confuse backend drivers that depend on this value matching the 557b7191253SNicholas Bellinger * size of the I/O being submitted. 558b7191253SNicholas Bellinger */ 559b7191253SNicholas Bellinger cmd->data_length = cmd->t_task_nolb * dev->dev_attrib.block_size; 56068ff9b9bSNicholas Bellinger 56168ff9b9bSNicholas Bellinger ret = cmd->execute_rw(cmd, cmd->t_bidi_data_sg, cmd->t_bidi_data_nents, 56268ff9b9bSNicholas Bellinger DMA_FROM_DEVICE); 56368ff9b9bSNicholas Bellinger if (ret) { 56468ff9b9bSNicholas Bellinger cmd->transport_complete_callback = NULL; 56568ff9b9bSNicholas Bellinger up(&dev->caw_sem); 56668ff9b9bSNicholas Bellinger return ret; 56768ff9b9bSNicholas Bellinger } 56868ff9b9bSNicholas Bellinger /* 56968ff9b9bSNicholas Bellinger * Unlock of dev->caw_sem to occur in compare_and_write_callback() 57068ff9b9bSNicholas Bellinger * upon MISCOMPARE, or in compare_and_write_done() upon completion 57168ff9b9bSNicholas Bellinger * of WRITE instance user-data. 57268ff9b9bSNicholas Bellinger */ 57368ff9b9bSNicholas Bellinger return TCM_NO_SENSE; 57468ff9b9bSNicholas Bellinger } 57568ff9b9bSNicholas Bellinger 57619f9361aSSagi Grimberg static int 57719f9361aSSagi Grimberg sbc_set_prot_op_checks(u8 protect, enum target_prot_type prot_type, 57819f9361aSSagi Grimberg bool is_write, struct se_cmd *cmd) 57919f9361aSSagi Grimberg { 58019f9361aSSagi Grimberg if (is_write) { 58119f9361aSSagi Grimberg cmd->prot_op = protect ? TARGET_PROT_DOUT_PASS : 58219f9361aSSagi Grimberg TARGET_PROT_DOUT_INSERT; 58319f9361aSSagi Grimberg switch (protect) { 58419f9361aSSagi Grimberg case 0x0: 58519f9361aSSagi Grimberg case 0x3: 58619f9361aSSagi Grimberg cmd->prot_checks = 0; 58719f9361aSSagi Grimberg break; 58819f9361aSSagi Grimberg case 0x1: 58919f9361aSSagi Grimberg case 0x5: 59019f9361aSSagi Grimberg cmd->prot_checks = TARGET_DIF_CHECK_GUARD; 59119f9361aSSagi Grimberg if (prot_type == TARGET_DIF_TYPE1_PROT) 59219f9361aSSagi Grimberg cmd->prot_checks |= TARGET_DIF_CHECK_REFTAG; 59319f9361aSSagi Grimberg break; 59419f9361aSSagi Grimberg case 0x2: 59519f9361aSSagi Grimberg if (prot_type == TARGET_DIF_TYPE1_PROT) 59619f9361aSSagi Grimberg cmd->prot_checks = TARGET_DIF_CHECK_REFTAG; 59719f9361aSSagi Grimberg break; 59819f9361aSSagi Grimberg case 0x4: 59919f9361aSSagi Grimberg cmd->prot_checks = TARGET_DIF_CHECK_GUARD; 60019f9361aSSagi Grimberg break; 60119f9361aSSagi Grimberg default: 60219f9361aSSagi Grimberg pr_err("Unsupported protect field %d\n", protect); 60319f9361aSSagi Grimberg return -EINVAL; 60419f9361aSSagi Grimberg } 60519f9361aSSagi Grimberg } else { 60619f9361aSSagi Grimberg cmd->prot_op = protect ? TARGET_PROT_DIN_PASS : 60719f9361aSSagi Grimberg TARGET_PROT_DIN_STRIP; 60819f9361aSSagi Grimberg switch (protect) { 60919f9361aSSagi Grimberg case 0x0: 61019f9361aSSagi Grimberg case 0x1: 61119f9361aSSagi Grimberg case 0x5: 61219f9361aSSagi Grimberg cmd->prot_checks = TARGET_DIF_CHECK_GUARD; 61319f9361aSSagi Grimberg if (prot_type == TARGET_DIF_TYPE1_PROT) 61419f9361aSSagi Grimberg cmd->prot_checks |= TARGET_DIF_CHECK_REFTAG; 61519f9361aSSagi Grimberg break; 61619f9361aSSagi Grimberg case 0x2: 61719f9361aSSagi Grimberg if (prot_type == TARGET_DIF_TYPE1_PROT) 61819f9361aSSagi Grimberg cmd->prot_checks = TARGET_DIF_CHECK_REFTAG; 61919f9361aSSagi Grimberg break; 62019f9361aSSagi Grimberg case 0x3: 62119f9361aSSagi Grimberg cmd->prot_checks = 0; 62219f9361aSSagi Grimberg break; 62319f9361aSSagi Grimberg case 0x4: 62419f9361aSSagi Grimberg cmd->prot_checks = TARGET_DIF_CHECK_GUARD; 62519f9361aSSagi Grimberg break; 62619f9361aSSagi Grimberg default: 62719f9361aSSagi Grimberg pr_err("Unsupported protect field %d\n", protect); 62819f9361aSSagi Grimberg return -EINVAL; 62919f9361aSSagi Grimberg } 63019f9361aSSagi Grimberg } 63119f9361aSSagi Grimberg 63219f9361aSSagi Grimberg return 0; 63319f9361aSSagi Grimberg } 63419f9361aSSagi Grimberg 635499bf77bSNicholas Bellinger static bool 636499bf77bSNicholas Bellinger sbc_check_prot(struct se_device *dev, struct se_cmd *cmd, unsigned char *cdb, 63719f9361aSSagi Grimberg u32 sectors, bool is_write) 638499bf77bSNicholas Bellinger { 63919f9361aSSagi Grimberg u8 protect = cdb[1] >> 5; 64019f9361aSSagi Grimberg 641b5b8e298SSagi Grimberg if ((!cmd->t_prot_sg || !cmd->t_prot_nents) && cmd->prot_pto) 642499bf77bSNicholas Bellinger return true; 643499bf77bSNicholas Bellinger 644499bf77bSNicholas Bellinger switch (dev->dev_attrib.pi_prot_type) { 645499bf77bSNicholas Bellinger case TARGET_DIF_TYPE3_PROT: 646499bf77bSNicholas Bellinger cmd->reftag_seed = 0xffffffff; 647499bf77bSNicholas Bellinger break; 648499bf77bSNicholas Bellinger case TARGET_DIF_TYPE2_PROT: 64919f9361aSSagi Grimberg if (protect) 650499bf77bSNicholas Bellinger return false; 651499bf77bSNicholas Bellinger 652499bf77bSNicholas Bellinger cmd->reftag_seed = cmd->t_task_lba; 653499bf77bSNicholas Bellinger break; 654499bf77bSNicholas Bellinger case TARGET_DIF_TYPE1_PROT: 655499bf77bSNicholas Bellinger cmd->reftag_seed = cmd->t_task_lba; 656499bf77bSNicholas Bellinger break; 657499bf77bSNicholas Bellinger case TARGET_DIF_TYPE0_PROT: 658499bf77bSNicholas Bellinger default: 659499bf77bSNicholas Bellinger return true; 660499bf77bSNicholas Bellinger } 661499bf77bSNicholas Bellinger 66219f9361aSSagi Grimberg if (sbc_set_prot_op_checks(protect, dev->dev_attrib.pi_prot_type, 66319f9361aSSagi Grimberg is_write, cmd)) 66419f9361aSSagi Grimberg return false; 66519f9361aSSagi Grimberg 666499bf77bSNicholas Bellinger cmd->prot_type = dev->dev_attrib.pi_prot_type; 667499bf77bSNicholas Bellinger cmd->prot_length = dev->prot_length * sectors; 66803abad9eSSagi Grimberg pr_debug("%s: prot_type=%d, prot_length=%d prot_op=%d prot_checks=%d\n", 66903abad9eSSagi Grimberg __func__, cmd->prot_type, cmd->prot_length, 67003abad9eSSagi Grimberg cmd->prot_op, cmd->prot_checks); 671499bf77bSNicholas Bellinger 672499bf77bSNicholas Bellinger return true; 673499bf77bSNicholas Bellinger } 674499bf77bSNicholas Bellinger 675de103c93SChristoph Hellwig sense_reason_t 676de103c93SChristoph Hellwig sbc_parse_cdb(struct se_cmd *cmd, struct sbc_ops *ops) 677d6e0175cSChristoph Hellwig { 678d6e0175cSChristoph Hellwig struct se_device *dev = cmd->se_dev; 679d6e0175cSChristoph Hellwig unsigned char *cdb = cmd->t_task_cdb; 6801fd032eeSChristoph Hellwig unsigned int size; 681d6e0175cSChristoph Hellwig u32 sectors = 0; 682de103c93SChristoph Hellwig sense_reason_t ret; 683d6e0175cSChristoph Hellwig 684d6e0175cSChristoph Hellwig switch (cdb[0]) { 685d6e0175cSChristoph Hellwig case READ_6: 686d6e0175cSChristoph Hellwig sectors = transport_get_sectors_6(cdb); 687d6e0175cSChristoph Hellwig cmd->t_task_lba = transport_lba_21(cdb); 688d6e0175cSChristoph Hellwig cmd->se_cmd_flags |= SCF_SCSI_DATA_CDB; 689a82a9538SNicholas Bellinger cmd->execute_rw = ops->execute_rw; 690a82a9538SNicholas Bellinger cmd->execute_cmd = sbc_execute_rw; 691d6e0175cSChristoph Hellwig break; 692d6e0175cSChristoph Hellwig case READ_10: 693d6e0175cSChristoph Hellwig sectors = transport_get_sectors_10(cdb); 694d6e0175cSChristoph Hellwig cmd->t_task_lba = transport_lba_32(cdb); 695499bf77bSNicholas Bellinger 69619f9361aSSagi Grimberg if (!sbc_check_prot(dev, cmd, cdb, sectors, false)) 697499bf77bSNicholas Bellinger return TCM_UNSUPPORTED_SCSI_OPCODE; 698499bf77bSNicholas Bellinger 699d6e0175cSChristoph Hellwig cmd->se_cmd_flags |= SCF_SCSI_DATA_CDB; 700a82a9538SNicholas Bellinger cmd->execute_rw = ops->execute_rw; 701a82a9538SNicholas Bellinger cmd->execute_cmd = sbc_execute_rw; 702d6e0175cSChristoph Hellwig break; 703d6e0175cSChristoph Hellwig case READ_12: 704d6e0175cSChristoph Hellwig sectors = transport_get_sectors_12(cdb); 705d6e0175cSChristoph Hellwig cmd->t_task_lba = transport_lba_32(cdb); 706499bf77bSNicholas Bellinger 70719f9361aSSagi Grimberg if (!sbc_check_prot(dev, cmd, cdb, sectors, false)) 708499bf77bSNicholas Bellinger return TCM_UNSUPPORTED_SCSI_OPCODE; 709499bf77bSNicholas Bellinger 710d6e0175cSChristoph Hellwig cmd->se_cmd_flags |= SCF_SCSI_DATA_CDB; 711a82a9538SNicholas Bellinger cmd->execute_rw = ops->execute_rw; 712a82a9538SNicholas Bellinger cmd->execute_cmd = sbc_execute_rw; 713d6e0175cSChristoph Hellwig break; 714d6e0175cSChristoph Hellwig case READ_16: 715d6e0175cSChristoph Hellwig sectors = transport_get_sectors_16(cdb); 716d6e0175cSChristoph Hellwig cmd->t_task_lba = transport_lba_64(cdb); 717499bf77bSNicholas Bellinger 71819f9361aSSagi Grimberg if (!sbc_check_prot(dev, cmd, cdb, sectors, false)) 719499bf77bSNicholas Bellinger return TCM_UNSUPPORTED_SCSI_OPCODE; 720499bf77bSNicholas Bellinger 721d6e0175cSChristoph Hellwig cmd->se_cmd_flags |= SCF_SCSI_DATA_CDB; 722a82a9538SNicholas Bellinger cmd->execute_rw = ops->execute_rw; 723a82a9538SNicholas Bellinger cmd->execute_cmd = sbc_execute_rw; 724d6e0175cSChristoph Hellwig break; 725d6e0175cSChristoph Hellwig case WRITE_6: 726d6e0175cSChristoph Hellwig sectors = transport_get_sectors_6(cdb); 727d6e0175cSChristoph Hellwig cmd->t_task_lba = transport_lba_21(cdb); 728d6e0175cSChristoph Hellwig cmd->se_cmd_flags |= SCF_SCSI_DATA_CDB; 729a82a9538SNicholas Bellinger cmd->execute_rw = ops->execute_rw; 730a82a9538SNicholas Bellinger cmd->execute_cmd = sbc_execute_rw; 731d6e0175cSChristoph Hellwig break; 732d6e0175cSChristoph Hellwig case WRITE_10: 733d6e0175cSChristoph Hellwig case WRITE_VERIFY: 734d6e0175cSChristoph Hellwig sectors = transport_get_sectors_10(cdb); 735d6e0175cSChristoph Hellwig cmd->t_task_lba = transport_lba_32(cdb); 736499bf77bSNicholas Bellinger 73719f9361aSSagi Grimberg if (!sbc_check_prot(dev, cmd, cdb, sectors, true)) 738499bf77bSNicholas Bellinger return TCM_UNSUPPORTED_SCSI_OPCODE; 739499bf77bSNicholas Bellinger 740d6e0175cSChristoph Hellwig if (cdb[1] & 0x8) 741d6e0175cSChristoph Hellwig cmd->se_cmd_flags |= SCF_FUA; 742d6e0175cSChristoph Hellwig cmd->se_cmd_flags |= SCF_SCSI_DATA_CDB; 743a82a9538SNicholas Bellinger cmd->execute_rw = ops->execute_rw; 744a82a9538SNicholas Bellinger cmd->execute_cmd = sbc_execute_rw; 745d6e0175cSChristoph Hellwig break; 746d6e0175cSChristoph Hellwig case WRITE_12: 747d6e0175cSChristoph Hellwig sectors = transport_get_sectors_12(cdb); 748d6e0175cSChristoph Hellwig cmd->t_task_lba = transport_lba_32(cdb); 749499bf77bSNicholas Bellinger 75019f9361aSSagi Grimberg if (!sbc_check_prot(dev, cmd, cdb, sectors, true)) 751499bf77bSNicholas Bellinger return TCM_UNSUPPORTED_SCSI_OPCODE; 752499bf77bSNicholas Bellinger 753d6e0175cSChristoph Hellwig if (cdb[1] & 0x8) 754d6e0175cSChristoph Hellwig cmd->se_cmd_flags |= SCF_FUA; 755d6e0175cSChristoph Hellwig cmd->se_cmd_flags |= SCF_SCSI_DATA_CDB; 756a82a9538SNicholas Bellinger cmd->execute_rw = ops->execute_rw; 757a82a9538SNicholas Bellinger cmd->execute_cmd = sbc_execute_rw; 758d6e0175cSChristoph Hellwig break; 759d6e0175cSChristoph Hellwig case WRITE_16: 760d6e0175cSChristoph Hellwig sectors = transport_get_sectors_16(cdb); 761d6e0175cSChristoph Hellwig cmd->t_task_lba = transport_lba_64(cdb); 762499bf77bSNicholas Bellinger 76319f9361aSSagi Grimberg if (!sbc_check_prot(dev, cmd, cdb, sectors, true)) 764499bf77bSNicholas Bellinger return TCM_UNSUPPORTED_SCSI_OPCODE; 765499bf77bSNicholas Bellinger 766d6e0175cSChristoph Hellwig if (cdb[1] & 0x8) 767d6e0175cSChristoph Hellwig cmd->se_cmd_flags |= SCF_FUA; 768d6e0175cSChristoph Hellwig cmd->se_cmd_flags |= SCF_SCSI_DATA_CDB; 769a82a9538SNicholas Bellinger cmd->execute_rw = ops->execute_rw; 770a82a9538SNicholas Bellinger cmd->execute_cmd = sbc_execute_rw; 771d6e0175cSChristoph Hellwig break; 772d6e0175cSChristoph Hellwig case XDWRITEREAD_10: 773de103c93SChristoph Hellwig if (cmd->data_direction != DMA_TO_DEVICE || 774d6e0175cSChristoph Hellwig !(cmd->se_cmd_flags & SCF_BIDI)) 775de103c93SChristoph Hellwig return TCM_INVALID_CDB_FIELD; 776d6e0175cSChristoph Hellwig sectors = transport_get_sectors_10(cdb); 777d6e0175cSChristoph Hellwig 778d6e0175cSChristoph Hellwig cmd->t_task_lba = transport_lba_32(cdb); 779d6e0175cSChristoph Hellwig cmd->se_cmd_flags |= SCF_SCSI_DATA_CDB; 780d6e0175cSChristoph Hellwig 781d6e0175cSChristoph Hellwig /* 782d6e0175cSChristoph Hellwig * Setup BIDI XOR callback to be run after I/O completion. 783d6e0175cSChristoph Hellwig */ 784a82a9538SNicholas Bellinger cmd->execute_rw = ops->execute_rw; 785a82a9538SNicholas Bellinger cmd->execute_cmd = sbc_execute_rw; 786d6e0175cSChristoph Hellwig cmd->transport_complete_callback = &xdreadwrite_callback; 787d6e0175cSChristoph Hellwig if (cdb[1] & 0x8) 788d6e0175cSChristoph Hellwig cmd->se_cmd_flags |= SCF_FUA; 789d6e0175cSChristoph Hellwig break; 790d6e0175cSChristoph Hellwig case VARIABLE_LENGTH_CMD: 791d6e0175cSChristoph Hellwig { 792d6e0175cSChristoph Hellwig u16 service_action = get_unaligned_be16(&cdb[8]); 793d6e0175cSChristoph Hellwig switch (service_action) { 794d6e0175cSChristoph Hellwig case XDWRITEREAD_32: 795d6e0175cSChristoph Hellwig sectors = transport_get_sectors_32(cdb); 796d6e0175cSChristoph Hellwig 797d6e0175cSChristoph Hellwig /* 798d6e0175cSChristoph Hellwig * Use WRITE_32 and READ_32 opcodes for the emulated 799d6e0175cSChristoph Hellwig * XDWRITE_READ_32 logic. 800d6e0175cSChristoph Hellwig */ 801d6e0175cSChristoph Hellwig cmd->t_task_lba = transport_lba_64_ext(cdb); 802d6e0175cSChristoph Hellwig cmd->se_cmd_flags |= SCF_SCSI_DATA_CDB; 803d6e0175cSChristoph Hellwig 804d6e0175cSChristoph Hellwig /* 805d6e0175cSChristoph Hellwig * Setup BIDI XOR callback to be run during after I/O 806d6e0175cSChristoph Hellwig * completion. 807d6e0175cSChristoph Hellwig */ 808a82a9538SNicholas Bellinger cmd->execute_rw = ops->execute_rw; 809a82a9538SNicholas Bellinger cmd->execute_cmd = sbc_execute_rw; 810d6e0175cSChristoph Hellwig cmd->transport_complete_callback = &xdreadwrite_callback; 811d6e0175cSChristoph Hellwig if (cdb[1] & 0x8) 812d6e0175cSChristoph Hellwig cmd->se_cmd_flags |= SCF_FUA; 813d6e0175cSChristoph Hellwig break; 814d6e0175cSChristoph Hellwig case WRITE_SAME_32: 815d6e0175cSChristoph Hellwig sectors = transport_get_sectors_32(cdb); 816d6e0175cSChristoph Hellwig if (!sectors) { 817d6e0175cSChristoph Hellwig pr_err("WSNZ=1, WRITE_SAME w/sectors=0 not" 818d6e0175cSChristoph Hellwig " supported\n"); 819de103c93SChristoph Hellwig return TCM_INVALID_CDB_FIELD; 820d6e0175cSChristoph Hellwig } 821d6e0175cSChristoph Hellwig 8221fd032eeSChristoph Hellwig size = sbc_get_size(cmd, 1); 823d6e0175cSChristoph Hellwig cmd->t_task_lba = get_unaligned_be64(&cdb[12]); 824d6e0175cSChristoph Hellwig 825cd063befSNicholas Bellinger ret = sbc_setup_write_same(cmd, &cdb[10], ops); 8266b64e1feSDan Carpenter if (ret) 827cd063befSNicholas Bellinger return ret; 828d6e0175cSChristoph Hellwig break; 829d6e0175cSChristoph Hellwig default: 830d6e0175cSChristoph Hellwig pr_err("VARIABLE_LENGTH_CMD service action" 831d6e0175cSChristoph Hellwig " 0x%04x not supported\n", service_action); 832de103c93SChristoph Hellwig return TCM_UNSUPPORTED_SCSI_OPCODE; 833d6e0175cSChristoph Hellwig } 834d6e0175cSChristoph Hellwig break; 835d6e0175cSChristoph Hellwig } 83668ff9b9bSNicholas Bellinger case COMPARE_AND_WRITE: 83768ff9b9bSNicholas Bellinger sectors = cdb[13]; 83868ff9b9bSNicholas Bellinger /* 83968ff9b9bSNicholas Bellinger * Currently enforce COMPARE_AND_WRITE for a single sector 84068ff9b9bSNicholas Bellinger */ 84168ff9b9bSNicholas Bellinger if (sectors > 1) { 84268ff9b9bSNicholas Bellinger pr_err("COMPARE_AND_WRITE contains NoLB: %u greater" 84368ff9b9bSNicholas Bellinger " than 1\n", sectors); 84468ff9b9bSNicholas Bellinger return TCM_INVALID_CDB_FIELD; 84568ff9b9bSNicholas Bellinger } 84668ff9b9bSNicholas Bellinger /* 84768ff9b9bSNicholas Bellinger * Double size because we have two buffers, note that 84868ff9b9bSNicholas Bellinger * zero is not an error.. 84968ff9b9bSNicholas Bellinger */ 85068ff9b9bSNicholas Bellinger size = 2 * sbc_get_size(cmd, sectors); 85168ff9b9bSNicholas Bellinger cmd->t_task_lba = get_unaligned_be64(&cdb[2]); 85268ff9b9bSNicholas Bellinger cmd->t_task_nolb = sectors; 85368ff9b9bSNicholas Bellinger cmd->se_cmd_flags |= SCF_SCSI_DATA_CDB | SCF_COMPARE_AND_WRITE; 85468ff9b9bSNicholas Bellinger cmd->execute_rw = ops->execute_rw; 85568ff9b9bSNicholas Bellinger cmd->execute_cmd = sbc_compare_and_write; 85668ff9b9bSNicholas Bellinger cmd->transport_complete_callback = compare_and_write_callback; 85768ff9b9bSNicholas Bellinger break; 858d6e0175cSChristoph Hellwig case READ_CAPACITY: 8591fd032eeSChristoph Hellwig size = READ_CAP_LEN; 8601fd032eeSChristoph Hellwig cmd->execute_cmd = sbc_emulate_readcapacity; 861d6e0175cSChristoph Hellwig break; 862d6e0175cSChristoph Hellwig case SERVICE_ACTION_IN: 863d6e0175cSChristoph Hellwig switch (cmd->t_task_cdb[1] & 0x1f) { 864d6e0175cSChristoph Hellwig case SAI_READ_CAPACITY_16: 8651fd032eeSChristoph Hellwig cmd->execute_cmd = sbc_emulate_readcapacity_16; 866d6e0175cSChristoph Hellwig break; 867c66094bfSHannes Reinecke case SAI_REPORT_REFERRALS: 868c66094bfSHannes Reinecke cmd->execute_cmd = target_emulate_report_referrals; 869c66094bfSHannes Reinecke break; 870d6e0175cSChristoph Hellwig default: 871d6e0175cSChristoph Hellwig pr_err("Unsupported SA: 0x%02x\n", 872d6e0175cSChristoph Hellwig cmd->t_task_cdb[1] & 0x1f); 873de103c93SChristoph Hellwig return TCM_INVALID_CDB_FIELD; 874d6e0175cSChristoph Hellwig } 8751fd032eeSChristoph Hellwig size = (cdb[10] << 24) | (cdb[11] << 16) | 876d6e0175cSChristoph Hellwig (cdb[12] << 8) | cdb[13]; 877d6e0175cSChristoph Hellwig break; 878d6e0175cSChristoph Hellwig case SYNCHRONIZE_CACHE: 879d6e0175cSChristoph Hellwig case SYNCHRONIZE_CACHE_16: 880882e3f8eSHannes Reinecke if (!ops->execute_sync_cache) { 881882e3f8eSHannes Reinecke size = 0; 882882e3f8eSHannes Reinecke cmd->execute_cmd = sbc_emulate_noop; 883882e3f8eSHannes Reinecke break; 884882e3f8eSHannes Reinecke } 885ad67f0d9SChristoph Hellwig 886d6e0175cSChristoph Hellwig /* 887d6e0175cSChristoph Hellwig * Extract LBA and range to be flushed for emulated SYNCHRONIZE_CACHE 888d6e0175cSChristoph Hellwig */ 889d6e0175cSChristoph Hellwig if (cdb[0] == SYNCHRONIZE_CACHE) { 890d6e0175cSChristoph Hellwig sectors = transport_get_sectors_10(cdb); 891d6e0175cSChristoph Hellwig cmd->t_task_lba = transport_lba_32(cdb); 892d6e0175cSChristoph Hellwig } else { 893d6e0175cSChristoph Hellwig sectors = transport_get_sectors_16(cdb); 894d6e0175cSChristoph Hellwig cmd->t_task_lba = transport_lba_64(cdb); 895d6e0175cSChristoph Hellwig } 896d6e0175cSChristoph Hellwig 8971fd032eeSChristoph Hellwig size = sbc_get_size(cmd, sectors); 898d6e0175cSChristoph Hellwig 899d6e0175cSChristoph Hellwig /* 900d6e0175cSChristoph Hellwig * Check to ensure that LBA + Range does not exceed past end of 901d6e0175cSChristoph Hellwig * device for IBLOCK and FILEIO ->do_sync_cache() backend calls 902d6e0175cSChristoph Hellwig */ 903d6e0175cSChristoph Hellwig if (cmd->t_task_lba || sectors) { 904d6e0175cSChristoph Hellwig if (sbc_check_valid_sectors(cmd) < 0) 90533633676SRoland Dreier return TCM_ADDRESS_OUT_OF_RANGE; 906d6e0175cSChristoph Hellwig } 907ad67f0d9SChristoph Hellwig cmd->execute_cmd = ops->execute_sync_cache; 908d6e0175cSChristoph Hellwig break; 909d6e0175cSChristoph Hellwig case UNMAP: 91014150a6bSChristoph Hellwig if (!ops->execute_unmap) 911de103c93SChristoph Hellwig return TCM_UNSUPPORTED_SCSI_OPCODE; 91214150a6bSChristoph Hellwig 9131fd032eeSChristoph Hellwig size = get_unaligned_be16(&cdb[7]); 91414150a6bSChristoph Hellwig cmd->execute_cmd = ops->execute_unmap; 915d6e0175cSChristoph Hellwig break; 916d6e0175cSChristoph Hellwig case WRITE_SAME_16: 917d6e0175cSChristoph Hellwig sectors = transport_get_sectors_16(cdb); 918d6e0175cSChristoph Hellwig if (!sectors) { 919d6e0175cSChristoph Hellwig pr_err("WSNZ=1, WRITE_SAME w/sectors=0 not supported\n"); 920de103c93SChristoph Hellwig return TCM_INVALID_CDB_FIELD; 921d6e0175cSChristoph Hellwig } 922d6e0175cSChristoph Hellwig 9231fd032eeSChristoph Hellwig size = sbc_get_size(cmd, 1); 924d6e0175cSChristoph Hellwig cmd->t_task_lba = get_unaligned_be64(&cdb[2]); 925d6e0175cSChristoph Hellwig 926cd063befSNicholas Bellinger ret = sbc_setup_write_same(cmd, &cdb[1], ops); 9276b64e1feSDan Carpenter if (ret) 928cd063befSNicholas Bellinger return ret; 929d6e0175cSChristoph Hellwig break; 930d6e0175cSChristoph Hellwig case WRITE_SAME: 931d6e0175cSChristoph Hellwig sectors = transport_get_sectors_10(cdb); 932d6e0175cSChristoph Hellwig if (!sectors) { 933d6e0175cSChristoph Hellwig pr_err("WSNZ=1, WRITE_SAME w/sectors=0 not supported\n"); 934de103c93SChristoph Hellwig return TCM_INVALID_CDB_FIELD; 935d6e0175cSChristoph Hellwig } 936d6e0175cSChristoph Hellwig 9371fd032eeSChristoph Hellwig size = sbc_get_size(cmd, 1); 938d6e0175cSChristoph Hellwig cmd->t_task_lba = get_unaligned_be32(&cdb[2]); 939d6e0175cSChristoph Hellwig 940d6e0175cSChristoph Hellwig /* 941d6e0175cSChristoph Hellwig * Follow sbcr26 with WRITE_SAME (10) and check for the existence 942d6e0175cSChristoph Hellwig * of byte 1 bit 3 UNMAP instead of original reserved field 943d6e0175cSChristoph Hellwig */ 944cd063befSNicholas Bellinger ret = sbc_setup_write_same(cmd, &cdb[1], ops); 9456b64e1feSDan Carpenter if (ret) 946cd063befSNicholas Bellinger return ret; 947d6e0175cSChristoph Hellwig break; 948d6e0175cSChristoph Hellwig case VERIFY: 9491fd032eeSChristoph Hellwig size = 0; 9501920ed61SNicholas Bellinger cmd->execute_cmd = sbc_emulate_noop; 951d6e0175cSChristoph Hellwig break; 9521a1ff38cSBernhard Kohl case REZERO_UNIT: 9531a1ff38cSBernhard Kohl case SEEK_6: 9541a1ff38cSBernhard Kohl case SEEK_10: 9551a1ff38cSBernhard Kohl /* 9561a1ff38cSBernhard Kohl * There are still clients out there which use these old SCSI-2 9571a1ff38cSBernhard Kohl * commands. This mainly happens when running VMs with legacy 9581a1ff38cSBernhard Kohl * guest systems, connected via SCSI command pass-through to 9591a1ff38cSBernhard Kohl * iSCSI targets. Make them happy and return status GOOD. 9601a1ff38cSBernhard Kohl */ 9611a1ff38cSBernhard Kohl size = 0; 9621a1ff38cSBernhard Kohl cmd->execute_cmd = sbc_emulate_noop; 9631a1ff38cSBernhard Kohl break; 964d6e0175cSChristoph Hellwig default: 9651fd032eeSChristoph Hellwig ret = spc_parse_cdb(cmd, &size); 966d6e0175cSChristoph Hellwig if (ret) 967d6e0175cSChristoph Hellwig return ret; 968d6e0175cSChristoph Hellwig } 969d6e0175cSChristoph Hellwig 970d6e0175cSChristoph Hellwig /* reject any command that we don't have a handler for */ 971d6e0175cSChristoph Hellwig if (!(cmd->se_cmd_flags & SCF_SCSI_DATA_CDB) && !cmd->execute_cmd) 972de103c93SChristoph Hellwig return TCM_UNSUPPORTED_SCSI_OPCODE; 973d6e0175cSChristoph Hellwig 974d6e0175cSChristoph Hellwig if (cmd->se_cmd_flags & SCF_SCSI_DATA_CDB) { 9751fd032eeSChristoph Hellwig unsigned long long end_lba; 9761fd032eeSChristoph Hellwig 9770fd97ccfSChristoph Hellwig if (sectors > dev->dev_attrib.fabric_max_sectors) { 978d6e0175cSChristoph Hellwig printk_ratelimited(KERN_ERR "SCSI OP %02xh with too" 979d6e0175cSChristoph Hellwig " big sectors %u exceeds fabric_max_sectors:" 980d6e0175cSChristoph Hellwig " %u\n", cdb[0], sectors, 9810fd97ccfSChristoph Hellwig dev->dev_attrib.fabric_max_sectors); 982de103c93SChristoph Hellwig return TCM_INVALID_CDB_FIELD; 983d6e0175cSChristoph Hellwig } 9840fd97ccfSChristoph Hellwig if (sectors > dev->dev_attrib.hw_max_sectors) { 985d6e0175cSChristoph Hellwig printk_ratelimited(KERN_ERR "SCSI OP %02xh with too" 986d6e0175cSChristoph Hellwig " big sectors %u exceeds backend hw_max_sectors:" 987d6e0175cSChristoph Hellwig " %u\n", cdb[0], sectors, 9880fd97ccfSChristoph Hellwig dev->dev_attrib.hw_max_sectors); 989de103c93SChristoph Hellwig return TCM_INVALID_CDB_FIELD; 990d6e0175cSChristoph Hellwig } 991d6e0175cSChristoph Hellwig 9921fd032eeSChristoph Hellwig end_lba = dev->transport->get_blocks(dev) + 1; 9931fd032eeSChristoph Hellwig if (cmd->t_task_lba + sectors > end_lba) { 9941fd032eeSChristoph Hellwig pr_err("cmd exceeds last lba %llu " 9951fd032eeSChristoph Hellwig "(lba %llu, sectors %u)\n", 9961fd032eeSChristoph Hellwig end_lba, cmd->t_task_lba, sectors); 99709ceadc7SRoland Dreier return TCM_ADDRESS_OUT_OF_RANGE; 998d6e0175cSChristoph Hellwig } 999d6e0175cSChristoph Hellwig 100068ff9b9bSNicholas Bellinger if (!(cmd->se_cmd_flags & SCF_COMPARE_AND_WRITE)) 10011fd032eeSChristoph Hellwig size = sbc_get_size(cmd, sectors); 10021fd032eeSChristoph Hellwig } 10031fd032eeSChristoph Hellwig 1004de103c93SChristoph Hellwig return target_cmd_size_check(cmd, size); 1005d6e0175cSChristoph Hellwig } 1006d6e0175cSChristoph Hellwig EXPORT_SYMBOL(sbc_parse_cdb); 10076f23ac8aSChristoph Hellwig 10086f23ac8aSChristoph Hellwig u32 sbc_get_device_type(struct se_device *dev) 10096f23ac8aSChristoph Hellwig { 10106f23ac8aSChristoph Hellwig return TYPE_DISK; 10116f23ac8aSChristoph Hellwig } 10126f23ac8aSChristoph Hellwig EXPORT_SYMBOL(sbc_get_device_type); 101386d71829SAsias He 101486d71829SAsias He sense_reason_t 101586d71829SAsias He sbc_execute_unmap(struct se_cmd *cmd, 101686d71829SAsias He sense_reason_t (*do_unmap_fn)(struct se_cmd *, void *, 101786d71829SAsias He sector_t, sector_t), 101886d71829SAsias He void *priv) 101986d71829SAsias He { 102086d71829SAsias He struct se_device *dev = cmd->se_dev; 102186d71829SAsias He unsigned char *buf, *ptr = NULL; 102286d71829SAsias He sector_t lba; 102386d71829SAsias He int size; 102486d71829SAsias He u32 range; 102586d71829SAsias He sense_reason_t ret = 0; 102686d71829SAsias He int dl, bd_dl; 102786d71829SAsias He 102886d71829SAsias He /* We never set ANC_SUP */ 102986d71829SAsias He if (cmd->t_task_cdb[1]) 103086d71829SAsias He return TCM_INVALID_CDB_FIELD; 103186d71829SAsias He 103286d71829SAsias He if (cmd->data_length == 0) { 103386d71829SAsias He target_complete_cmd(cmd, SAM_STAT_GOOD); 103486d71829SAsias He return 0; 103586d71829SAsias He } 103686d71829SAsias He 103786d71829SAsias He if (cmd->data_length < 8) { 103886d71829SAsias He pr_warn("UNMAP parameter list length %u too small\n", 103986d71829SAsias He cmd->data_length); 104086d71829SAsias He return TCM_PARAMETER_LIST_LENGTH_ERROR; 104186d71829SAsias He } 104286d71829SAsias He 104386d71829SAsias He buf = transport_kmap_data_sg(cmd); 104486d71829SAsias He if (!buf) 104586d71829SAsias He return TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; 104686d71829SAsias He 104786d71829SAsias He dl = get_unaligned_be16(&buf[0]); 104886d71829SAsias He bd_dl = get_unaligned_be16(&buf[2]); 104986d71829SAsias He 105086d71829SAsias He size = cmd->data_length - 8; 105186d71829SAsias He if (bd_dl > size) 105286d71829SAsias He pr_warn("UNMAP parameter list length %u too small, ignoring bd_dl %u\n", 105386d71829SAsias He cmd->data_length, bd_dl); 105486d71829SAsias He else 105586d71829SAsias He size = bd_dl; 105686d71829SAsias He 105786d71829SAsias He if (size / 16 > dev->dev_attrib.max_unmap_block_desc_count) { 105886d71829SAsias He ret = TCM_INVALID_PARAMETER_LIST; 105986d71829SAsias He goto err; 106086d71829SAsias He } 106186d71829SAsias He 106286d71829SAsias He /* First UNMAP block descriptor starts at 8 byte offset */ 106386d71829SAsias He ptr = &buf[8]; 106486d71829SAsias He pr_debug("UNMAP: Sub: %s Using dl: %u bd_dl: %u size: %u" 106586d71829SAsias He " ptr: %p\n", dev->transport->name, dl, bd_dl, size, ptr); 106686d71829SAsias He 106786d71829SAsias He while (size >= 16) { 106886d71829SAsias He lba = get_unaligned_be64(&ptr[0]); 106986d71829SAsias He range = get_unaligned_be32(&ptr[8]); 107086d71829SAsias He pr_debug("UNMAP: Using lba: %llu and range: %u\n", 107186d71829SAsias He (unsigned long long)lba, range); 107286d71829SAsias He 107386d71829SAsias He if (range > dev->dev_attrib.max_unmap_lba_count) { 107486d71829SAsias He ret = TCM_INVALID_PARAMETER_LIST; 107586d71829SAsias He goto err; 107686d71829SAsias He } 107786d71829SAsias He 107886d71829SAsias He if (lba + range > dev->transport->get_blocks(dev) + 1) { 107986d71829SAsias He ret = TCM_ADDRESS_OUT_OF_RANGE; 108086d71829SAsias He goto err; 108186d71829SAsias He } 108286d71829SAsias He 108386d71829SAsias He ret = do_unmap_fn(cmd, priv, lba, range); 108486d71829SAsias He if (ret) 108586d71829SAsias He goto err; 108686d71829SAsias He 108786d71829SAsias He ptr += 16; 108886d71829SAsias He size -= 16; 108986d71829SAsias He } 109086d71829SAsias He 109186d71829SAsias He err: 109286d71829SAsias He transport_kunmap_data_sg(cmd); 109386d71829SAsias He if (!ret) 109486d71829SAsias He target_complete_cmd(cmd, GOOD); 109586d71829SAsias He return ret; 109686d71829SAsias He } 109786d71829SAsias He EXPORT_SYMBOL(sbc_execute_unmap); 109841861fa8SNicholas Bellinger 109966a3d5bcSNicholas Bellinger void 110066a3d5bcSNicholas Bellinger sbc_dif_generate(struct se_cmd *cmd) 110166a3d5bcSNicholas Bellinger { 110266a3d5bcSNicholas Bellinger struct se_device *dev = cmd->se_dev; 110366a3d5bcSNicholas Bellinger struct se_dif_v1_tuple *sdt; 110466a3d5bcSNicholas Bellinger struct scatterlist *dsg, *psg = cmd->t_prot_sg; 110566a3d5bcSNicholas Bellinger sector_t sector = cmd->t_task_lba; 110666a3d5bcSNicholas Bellinger void *daddr, *paddr; 110766a3d5bcSNicholas Bellinger int i, j, offset = 0; 110866a3d5bcSNicholas Bellinger 110966a3d5bcSNicholas Bellinger for_each_sg(cmd->t_data_sg, dsg, cmd->t_data_nents, i) { 111066a3d5bcSNicholas Bellinger daddr = kmap_atomic(sg_page(dsg)) + dsg->offset; 111166a3d5bcSNicholas Bellinger paddr = kmap_atomic(sg_page(psg)) + psg->offset; 111266a3d5bcSNicholas Bellinger 111366a3d5bcSNicholas Bellinger for (j = 0; j < dsg->length; j += dev->dev_attrib.block_size) { 111466a3d5bcSNicholas Bellinger 111566a3d5bcSNicholas Bellinger if (offset >= psg->length) { 111666a3d5bcSNicholas Bellinger kunmap_atomic(paddr); 111766a3d5bcSNicholas Bellinger psg = sg_next(psg); 111866a3d5bcSNicholas Bellinger paddr = kmap_atomic(sg_page(psg)) + psg->offset; 111966a3d5bcSNicholas Bellinger offset = 0; 112066a3d5bcSNicholas Bellinger } 112166a3d5bcSNicholas Bellinger 112266a3d5bcSNicholas Bellinger sdt = paddr + offset; 112366a3d5bcSNicholas Bellinger sdt->guard_tag = cpu_to_be16(crc_t10dif(daddr + j, 112466a3d5bcSNicholas Bellinger dev->dev_attrib.block_size)); 112566a3d5bcSNicholas Bellinger if (dev->dev_attrib.pi_prot_type == TARGET_DIF_TYPE1_PROT) 112666a3d5bcSNicholas Bellinger sdt->ref_tag = cpu_to_be32(sector & 0xffffffff); 112766a3d5bcSNicholas Bellinger sdt->app_tag = 0; 112866a3d5bcSNicholas Bellinger 112966a3d5bcSNicholas Bellinger pr_debug("DIF WRITE INSERT sector: %llu guard_tag: 0x%04x" 113066a3d5bcSNicholas Bellinger " app_tag: 0x%04x ref_tag: %u\n", 113166a3d5bcSNicholas Bellinger (unsigned long long)sector, sdt->guard_tag, 113266a3d5bcSNicholas Bellinger sdt->app_tag, be32_to_cpu(sdt->ref_tag)); 113366a3d5bcSNicholas Bellinger 113466a3d5bcSNicholas Bellinger sector++; 113566a3d5bcSNicholas Bellinger offset += sizeof(struct se_dif_v1_tuple); 113666a3d5bcSNicholas Bellinger } 113766a3d5bcSNicholas Bellinger 113866a3d5bcSNicholas Bellinger kunmap_atomic(paddr); 113966a3d5bcSNicholas Bellinger kunmap_atomic(daddr); 114066a3d5bcSNicholas Bellinger } 114166a3d5bcSNicholas Bellinger } 114266a3d5bcSNicholas Bellinger 114341861fa8SNicholas Bellinger static sense_reason_t 114441861fa8SNicholas Bellinger sbc_dif_v1_verify(struct se_device *dev, struct se_dif_v1_tuple *sdt, 114541861fa8SNicholas Bellinger const void *p, sector_t sector, unsigned int ei_lba) 114641861fa8SNicholas Bellinger { 114741861fa8SNicholas Bellinger int block_size = dev->dev_attrib.block_size; 114841861fa8SNicholas Bellinger __be16 csum; 114941861fa8SNicholas Bellinger 115041861fa8SNicholas Bellinger csum = cpu_to_be16(crc_t10dif(p, block_size)); 115141861fa8SNicholas Bellinger 115241861fa8SNicholas Bellinger if (sdt->guard_tag != csum) { 115341861fa8SNicholas Bellinger pr_err("DIFv1 checksum failed on sector %llu guard tag 0x%04x" 115441861fa8SNicholas Bellinger " csum 0x%04x\n", (unsigned long long)sector, 115541861fa8SNicholas Bellinger be16_to_cpu(sdt->guard_tag), be16_to_cpu(csum)); 115641861fa8SNicholas Bellinger return TCM_LOGICAL_BLOCK_GUARD_CHECK_FAILED; 115741861fa8SNicholas Bellinger } 115841861fa8SNicholas Bellinger 115941861fa8SNicholas Bellinger if (dev->dev_attrib.pi_prot_type == TARGET_DIF_TYPE1_PROT && 116041861fa8SNicholas Bellinger be32_to_cpu(sdt->ref_tag) != (sector & 0xffffffff)) { 116141861fa8SNicholas Bellinger pr_err("DIFv1 Type 1 reference failed on sector: %llu tag: 0x%08x" 116241861fa8SNicholas Bellinger " sector MSB: 0x%08x\n", (unsigned long long)sector, 116341861fa8SNicholas Bellinger be32_to_cpu(sdt->ref_tag), (u32)(sector & 0xffffffff)); 116441861fa8SNicholas Bellinger return TCM_LOGICAL_BLOCK_REF_TAG_CHECK_FAILED; 116541861fa8SNicholas Bellinger } 116641861fa8SNicholas Bellinger 116741861fa8SNicholas Bellinger if (dev->dev_attrib.pi_prot_type == TARGET_DIF_TYPE2_PROT && 116841861fa8SNicholas Bellinger be32_to_cpu(sdt->ref_tag) != ei_lba) { 116941861fa8SNicholas Bellinger pr_err("DIFv1 Type 2 reference failed on sector: %llu tag: 0x%08x" 117041861fa8SNicholas Bellinger " ei_lba: 0x%08x\n", (unsigned long long)sector, 117141861fa8SNicholas Bellinger be32_to_cpu(sdt->ref_tag), ei_lba); 117241861fa8SNicholas Bellinger return TCM_LOGICAL_BLOCK_REF_TAG_CHECK_FAILED; 117341861fa8SNicholas Bellinger } 117441861fa8SNicholas Bellinger 117541861fa8SNicholas Bellinger return 0; 117641861fa8SNicholas Bellinger } 117741861fa8SNicholas Bellinger 117841861fa8SNicholas Bellinger static void 117941861fa8SNicholas Bellinger sbc_dif_copy_prot(struct se_cmd *cmd, unsigned int sectors, bool read, 118041861fa8SNicholas Bellinger struct scatterlist *sg, int sg_off) 118141861fa8SNicholas Bellinger { 118241861fa8SNicholas Bellinger struct se_device *dev = cmd->se_dev; 118341861fa8SNicholas Bellinger struct scatterlist *psg; 118441861fa8SNicholas Bellinger void *paddr, *addr; 118541861fa8SNicholas Bellinger unsigned int i, len, left; 118610762e80SNicholas Bellinger unsigned int offset = sg_off; 118741861fa8SNicholas Bellinger 118841861fa8SNicholas Bellinger left = sectors * dev->prot_length; 118941861fa8SNicholas Bellinger 119041861fa8SNicholas Bellinger for_each_sg(cmd->t_prot_sg, psg, cmd->t_prot_nents, i) { 119116c0ae02SSagi Grimberg unsigned int psg_len, copied = 0; 119241861fa8SNicholas Bellinger 119316c0ae02SSagi Grimberg paddr = kmap_atomic(sg_page(psg)) + psg->offset; 119416c0ae02SSagi Grimberg psg_len = min(left, psg->length); 119516c0ae02SSagi Grimberg while (psg_len) { 119616c0ae02SSagi Grimberg len = min(psg_len, sg->length - offset); 119716c0ae02SSagi Grimberg addr = kmap_atomic(sg_page(sg)) + sg->offset + offset; 119816c0ae02SSagi Grimberg 119916c0ae02SSagi Grimberg if (read) 120016c0ae02SSagi Grimberg memcpy(paddr + copied, addr, len); 120116c0ae02SSagi Grimberg else 120216c0ae02SSagi Grimberg memcpy(addr, paddr + copied, len); 120316c0ae02SSagi Grimberg 120416c0ae02SSagi Grimberg left -= len; 120516c0ae02SSagi Grimberg offset += len; 120616c0ae02SSagi Grimberg copied += len; 120716c0ae02SSagi Grimberg psg_len -= len; 120816c0ae02SSagi Grimberg 1209d6a65fdcSSagi Grimberg if (offset >= sg->length) { 1210d6a65fdcSSagi Grimberg sg = sg_next(sg); 1211d6a65fdcSSagi Grimberg offset = 0; 1212d6a65fdcSSagi Grimberg } 121341861fa8SNicholas Bellinger kunmap_atomic(addr); 121441861fa8SNicholas Bellinger } 121516c0ae02SSagi Grimberg kunmap_atomic(paddr); 121616c0ae02SSagi Grimberg } 121741861fa8SNicholas Bellinger } 121841861fa8SNicholas Bellinger 121941861fa8SNicholas Bellinger sense_reason_t 122041861fa8SNicholas Bellinger sbc_dif_verify_write(struct se_cmd *cmd, sector_t start, unsigned int sectors, 122141861fa8SNicholas Bellinger unsigned int ei_lba, struct scatterlist *sg, int sg_off) 122241861fa8SNicholas Bellinger { 122341861fa8SNicholas Bellinger struct se_device *dev = cmd->se_dev; 122441861fa8SNicholas Bellinger struct se_dif_v1_tuple *sdt; 122541861fa8SNicholas Bellinger struct scatterlist *dsg, *psg = cmd->t_prot_sg; 122641861fa8SNicholas Bellinger sector_t sector = start; 122741861fa8SNicholas Bellinger void *daddr, *paddr; 122841861fa8SNicholas Bellinger int i, j, offset = 0; 122941861fa8SNicholas Bellinger sense_reason_t rc; 123041861fa8SNicholas Bellinger 123141861fa8SNicholas Bellinger for_each_sg(cmd->t_data_sg, dsg, cmd->t_data_nents, i) { 123241861fa8SNicholas Bellinger daddr = kmap_atomic(sg_page(dsg)) + dsg->offset; 123341861fa8SNicholas Bellinger paddr = kmap_atomic(sg_page(psg)) + psg->offset; 123441861fa8SNicholas Bellinger 123541861fa8SNicholas Bellinger for (j = 0; j < dsg->length; j += dev->dev_attrib.block_size) { 123641861fa8SNicholas Bellinger 123741861fa8SNicholas Bellinger if (offset >= psg->length) { 123841861fa8SNicholas Bellinger kunmap_atomic(paddr); 123941861fa8SNicholas Bellinger psg = sg_next(psg); 124041861fa8SNicholas Bellinger paddr = kmap_atomic(sg_page(psg)) + psg->offset; 124141861fa8SNicholas Bellinger offset = 0; 124241861fa8SNicholas Bellinger } 124341861fa8SNicholas Bellinger 124441861fa8SNicholas Bellinger sdt = paddr + offset; 124541861fa8SNicholas Bellinger 124641861fa8SNicholas Bellinger pr_debug("DIF WRITE sector: %llu guard_tag: 0x%04x" 124741861fa8SNicholas Bellinger " app_tag: 0x%04x ref_tag: %u\n", 124841861fa8SNicholas Bellinger (unsigned long long)sector, sdt->guard_tag, 124941861fa8SNicholas Bellinger sdt->app_tag, be32_to_cpu(sdt->ref_tag)); 125041861fa8SNicholas Bellinger 125141861fa8SNicholas Bellinger rc = sbc_dif_v1_verify(dev, sdt, daddr + j, sector, 125241861fa8SNicholas Bellinger ei_lba); 125341861fa8SNicholas Bellinger if (rc) { 125441861fa8SNicholas Bellinger kunmap_atomic(paddr); 125541861fa8SNicholas Bellinger kunmap_atomic(daddr); 125676736db3SSagi Grimberg cmd->bad_sector = sector; 125741861fa8SNicholas Bellinger return rc; 125841861fa8SNicholas Bellinger } 125941861fa8SNicholas Bellinger 126041861fa8SNicholas Bellinger sector++; 126141861fa8SNicholas Bellinger ei_lba++; 126241861fa8SNicholas Bellinger offset += sizeof(struct se_dif_v1_tuple); 126341861fa8SNicholas Bellinger } 126441861fa8SNicholas Bellinger 126541861fa8SNicholas Bellinger kunmap_atomic(paddr); 126641861fa8SNicholas Bellinger kunmap_atomic(daddr); 126741861fa8SNicholas Bellinger } 126841861fa8SNicholas Bellinger sbc_dif_copy_prot(cmd, sectors, false, sg, sg_off); 126941861fa8SNicholas Bellinger 127041861fa8SNicholas Bellinger return 0; 127141861fa8SNicholas Bellinger } 127241861fa8SNicholas Bellinger EXPORT_SYMBOL(sbc_dif_verify_write); 127341861fa8SNicholas Bellinger 127441861fa8SNicholas Bellinger sense_reason_t 127541861fa8SNicholas Bellinger sbc_dif_verify_read(struct se_cmd *cmd, sector_t start, unsigned int sectors, 127641861fa8SNicholas Bellinger unsigned int ei_lba, struct scatterlist *sg, int sg_off) 127741861fa8SNicholas Bellinger { 127841861fa8SNicholas Bellinger struct se_device *dev = cmd->se_dev; 127941861fa8SNicholas Bellinger struct se_dif_v1_tuple *sdt; 1280fc272ec7SSagi Grimberg struct scatterlist *dsg, *psg = sg; 128141861fa8SNicholas Bellinger sector_t sector = start; 128241861fa8SNicholas Bellinger void *daddr, *paddr; 128341861fa8SNicholas Bellinger int i, j, offset = sg_off; 128441861fa8SNicholas Bellinger sense_reason_t rc; 128541861fa8SNicholas Bellinger 128641861fa8SNicholas Bellinger for_each_sg(cmd->t_data_sg, dsg, cmd->t_data_nents, i) { 128741861fa8SNicholas Bellinger daddr = kmap_atomic(sg_page(dsg)) + dsg->offset; 1288fc272ec7SSagi Grimberg paddr = kmap_atomic(sg_page(psg)) + sg->offset; 128941861fa8SNicholas Bellinger 129041861fa8SNicholas Bellinger for (j = 0; j < dsg->length; j += dev->dev_attrib.block_size) { 129141861fa8SNicholas Bellinger 1292fc272ec7SSagi Grimberg if (offset >= psg->length) { 129341861fa8SNicholas Bellinger kunmap_atomic(paddr); 1294fc272ec7SSagi Grimberg psg = sg_next(psg); 1295fc272ec7SSagi Grimberg paddr = kmap_atomic(sg_page(psg)) + psg->offset; 129641861fa8SNicholas Bellinger offset = 0; 129741861fa8SNicholas Bellinger } 129841861fa8SNicholas Bellinger 129941861fa8SNicholas Bellinger sdt = paddr + offset; 130041861fa8SNicholas Bellinger 130141861fa8SNicholas Bellinger pr_debug("DIF READ sector: %llu guard_tag: 0x%04x" 130241861fa8SNicholas Bellinger " app_tag: 0x%04x ref_tag: %u\n", 130341861fa8SNicholas Bellinger (unsigned long long)sector, sdt->guard_tag, 130441861fa8SNicholas Bellinger sdt->app_tag, be32_to_cpu(sdt->ref_tag)); 130541861fa8SNicholas Bellinger 130641861fa8SNicholas Bellinger if (sdt->app_tag == cpu_to_be16(0xffff)) { 130741861fa8SNicholas Bellinger sector++; 130841861fa8SNicholas Bellinger offset += sizeof(struct se_dif_v1_tuple); 130941861fa8SNicholas Bellinger continue; 131041861fa8SNicholas Bellinger } 131141861fa8SNicholas Bellinger 131241861fa8SNicholas Bellinger rc = sbc_dif_v1_verify(dev, sdt, daddr + j, sector, 131341861fa8SNicholas Bellinger ei_lba); 131441861fa8SNicholas Bellinger if (rc) { 131541861fa8SNicholas Bellinger kunmap_atomic(paddr); 131641861fa8SNicholas Bellinger kunmap_atomic(daddr); 131776736db3SSagi Grimberg cmd->bad_sector = sector; 131841861fa8SNicholas Bellinger return rc; 131941861fa8SNicholas Bellinger } 132041861fa8SNicholas Bellinger 132141861fa8SNicholas Bellinger sector++; 132241861fa8SNicholas Bellinger ei_lba++; 132341861fa8SNicholas Bellinger offset += sizeof(struct se_dif_v1_tuple); 132441861fa8SNicholas Bellinger } 132541861fa8SNicholas Bellinger 132641861fa8SNicholas Bellinger kunmap_atomic(paddr); 132741861fa8SNicholas Bellinger kunmap_atomic(daddr); 132841861fa8SNicholas Bellinger } 132941861fa8SNicholas Bellinger sbc_dif_copy_prot(cmd, sectors, true, sg, sg_off); 133041861fa8SNicholas Bellinger 133141861fa8SNicholas Bellinger return 0; 133241861fa8SNicholas Bellinger } 133341861fa8SNicholas Bellinger EXPORT_SYMBOL(sbc_dif_verify_read); 1334