target_core_sbc.c revision 68ff9b9b27525cdaaea81890456f65aed5ce0b70
1d6e0175cf3f9737a760482d185bb73566bcc9331Christoph Hellwig/* 2d6e0175cf3f9737a760482d185bb73566bcc9331Christoph Hellwig * SCSI Block Commands (SBC) parsing and emulation. 3d6e0175cf3f9737a760482d185bb73566bcc9331Christoph Hellwig * 4fd9a11d7076e1d534a760032d2b8f3b59e10f9b5Nicholas Bellinger * (c) Copyright 2002-2012 RisingTide Systems LLC. 5d6e0175cf3f9737a760482d185bb73566bcc9331Christoph Hellwig * 6d6e0175cf3f9737a760482d185bb73566bcc9331Christoph Hellwig * Nicholas A. Bellinger <nab@kernel.org> 7d6e0175cf3f9737a760482d185bb73566bcc9331Christoph Hellwig * 8d6e0175cf3f9737a760482d185bb73566bcc9331Christoph Hellwig * This program is free software; you can redistribute it and/or modify 9d6e0175cf3f9737a760482d185bb73566bcc9331Christoph Hellwig * it under the terms of the GNU General Public License as published by 10d6e0175cf3f9737a760482d185bb73566bcc9331Christoph Hellwig * the Free Software Foundation; either version 2 of the License, or 11d6e0175cf3f9737a760482d185bb73566bcc9331Christoph Hellwig * (at your option) any later version. 12d6e0175cf3f9737a760482d185bb73566bcc9331Christoph Hellwig * 13d6e0175cf3f9737a760482d185bb73566bcc9331Christoph Hellwig * This program is distributed in the hope that it will be useful, 14d6e0175cf3f9737a760482d185bb73566bcc9331Christoph Hellwig * but WITHOUT ANY WARRANTY; without even the implied warranty of 15d6e0175cf3f9737a760482d185bb73566bcc9331Christoph Hellwig * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 16d6e0175cf3f9737a760482d185bb73566bcc9331Christoph Hellwig * GNU General Public License for more details. 17d6e0175cf3f9737a760482d185bb73566bcc9331Christoph Hellwig * 18d6e0175cf3f9737a760482d185bb73566bcc9331Christoph Hellwig * You should have received a copy of the GNU General Public License 19d6e0175cf3f9737a760482d185bb73566bcc9331Christoph Hellwig * along with this program; if not, write to the Free Software 20d6e0175cf3f9737a760482d185bb73566bcc9331Christoph Hellwig * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. 21d6e0175cf3f9737a760482d185bb73566bcc9331Christoph Hellwig */ 22d6e0175cf3f9737a760482d185bb73566bcc9331Christoph Hellwig 23d6e0175cf3f9737a760482d185bb73566bcc9331Christoph Hellwig#include <linux/kernel.h> 24d6e0175cf3f9737a760482d185bb73566bcc9331Christoph Hellwig#include <linux/module.h> 25d6e0175cf3f9737a760482d185bb73566bcc9331Christoph Hellwig#include <linux/ratelimit.h> 26d6e0175cf3f9737a760482d185bb73566bcc9331Christoph Hellwig#include <asm/unaligned.h> 27d6e0175cf3f9737a760482d185bb73566bcc9331Christoph Hellwig#include <scsi/scsi.h> 2868ff9b9b27525cdaaea81890456f65aed5ce0b70Nicholas Bellinger#include <scsi/scsi_tcq.h> 29d6e0175cf3f9737a760482d185bb73566bcc9331Christoph Hellwig 30d6e0175cf3f9737a760482d185bb73566bcc9331Christoph Hellwig#include <target/target_core_base.h> 31d6e0175cf3f9737a760482d185bb73566bcc9331Christoph Hellwig#include <target/target_core_backend.h> 32d6e0175cf3f9737a760482d185bb73566bcc9331Christoph Hellwig#include <target/target_core_fabric.h> 33d6e0175cf3f9737a760482d185bb73566bcc9331Christoph Hellwig 34d6e0175cf3f9737a760482d185bb73566bcc9331Christoph Hellwig#include "target_core_internal.h" 35d6e0175cf3f9737a760482d185bb73566bcc9331Christoph Hellwig#include "target_core_ua.h" 36d6e0175cf3f9737a760482d185bb73566bcc9331Christoph Hellwig 37d6e0175cf3f9737a760482d185bb73566bcc9331Christoph Hellwig 38de103c93aff0bed0ae984274e5dc8b95899badabChristoph Hellwigstatic sense_reason_t 39de103c93aff0bed0ae984274e5dc8b95899badabChristoph Hellwigsbc_emulate_readcapacity(struct se_cmd *cmd) 401fd032ee10d2816c947f5d5b9abda95e728f0a8fChristoph Hellwig{ 411fd032ee10d2816c947f5d5b9abda95e728f0a8fChristoph Hellwig struct se_device *dev = cmd->se_dev; 428dc8632aa7bf1de7a56daea56a7011cbfff76678Roland Dreier unsigned char *cdb = cmd->t_task_cdb; 431fd032ee10d2816c947f5d5b9abda95e728f0a8fChristoph Hellwig unsigned long long blocks_long = dev->transport->get_blocks(dev); 44a50da144d048f9dbebed2b1441ed779d6bbbcd03Paolo Bonzini unsigned char *rbuf; 45a50da144d048f9dbebed2b1441ed779d6bbbcd03Paolo Bonzini unsigned char buf[8]; 461fd032ee10d2816c947f5d5b9abda95e728f0a8fChristoph Hellwig u32 blocks; 471fd032ee10d2816c947f5d5b9abda95e728f0a8fChristoph Hellwig 488dc8632aa7bf1de7a56daea56a7011cbfff76678Roland Dreier /* 498dc8632aa7bf1de7a56daea56a7011cbfff76678Roland Dreier * SBC-2 says: 508dc8632aa7bf1de7a56daea56a7011cbfff76678Roland Dreier * If the PMI bit is set to zero and the LOGICAL BLOCK 518dc8632aa7bf1de7a56daea56a7011cbfff76678Roland Dreier * ADDRESS field is not set to zero, the device server shall 528dc8632aa7bf1de7a56daea56a7011cbfff76678Roland Dreier * terminate the command with CHECK CONDITION status with 538dc8632aa7bf1de7a56daea56a7011cbfff76678Roland Dreier * the sense key set to ILLEGAL REQUEST and the additional 548dc8632aa7bf1de7a56daea56a7011cbfff76678Roland Dreier * sense code set to INVALID FIELD IN CDB. 558dc8632aa7bf1de7a56daea56a7011cbfff76678Roland Dreier * 568dc8632aa7bf1de7a56daea56a7011cbfff76678Roland Dreier * In SBC-3, these fields are obsolete, but some SCSI 578dc8632aa7bf1de7a56daea56a7011cbfff76678Roland Dreier * compliance tests actually check this, so we might as well 588dc8632aa7bf1de7a56daea56a7011cbfff76678Roland Dreier * follow SBC-2. 598dc8632aa7bf1de7a56daea56a7011cbfff76678Roland Dreier */ 608dc8632aa7bf1de7a56daea56a7011cbfff76678Roland Dreier if (!(cdb[8] & 1) && !!(cdb[2] | cdb[3] | cdb[4] | cdb[5])) 618dc8632aa7bf1de7a56daea56a7011cbfff76678Roland Dreier return TCM_INVALID_CDB_FIELD; 628dc8632aa7bf1de7a56daea56a7011cbfff76678Roland Dreier 631fd032ee10d2816c947f5d5b9abda95e728f0a8fChristoph Hellwig if (blocks_long >= 0x00000000ffffffff) 641fd032ee10d2816c947f5d5b9abda95e728f0a8fChristoph Hellwig blocks = 0xffffffff; 651fd032ee10d2816c947f5d5b9abda95e728f0a8fChristoph Hellwig else 661fd032ee10d2816c947f5d5b9abda95e728f0a8fChristoph Hellwig blocks = (u32)blocks_long; 671fd032ee10d2816c947f5d5b9abda95e728f0a8fChristoph Hellwig 681fd032ee10d2816c947f5d5b9abda95e728f0a8fChristoph Hellwig buf[0] = (blocks >> 24) & 0xff; 691fd032ee10d2816c947f5d5b9abda95e728f0a8fChristoph Hellwig buf[1] = (blocks >> 16) & 0xff; 701fd032ee10d2816c947f5d5b9abda95e728f0a8fChristoph Hellwig buf[2] = (blocks >> 8) & 0xff; 711fd032ee10d2816c947f5d5b9abda95e728f0a8fChristoph Hellwig buf[3] = blocks & 0xff; 720fd97ccf45be26fb01b3a412f1f6c6b5044b2f16Christoph Hellwig buf[4] = (dev->dev_attrib.block_size >> 24) & 0xff; 730fd97ccf45be26fb01b3a412f1f6c6b5044b2f16Christoph Hellwig buf[5] = (dev->dev_attrib.block_size >> 16) & 0xff; 740fd97ccf45be26fb01b3a412f1f6c6b5044b2f16Christoph Hellwig buf[6] = (dev->dev_attrib.block_size >> 8) & 0xff; 750fd97ccf45be26fb01b3a412f1f6c6b5044b2f16Christoph Hellwig buf[7] = dev->dev_attrib.block_size & 0xff; 761fd032ee10d2816c947f5d5b9abda95e728f0a8fChristoph Hellwig 77a50da144d048f9dbebed2b1441ed779d6bbbcd03Paolo Bonzini rbuf = transport_kmap_data_sg(cmd); 788b4b0dcbf70d10f3acd6a88fca0679ca711066e0Nicholas Bellinger if (rbuf) { 798b4b0dcbf70d10f3acd6a88fca0679ca711066e0Nicholas Bellinger memcpy(rbuf, buf, min_t(u32, sizeof(buf), cmd->data_length)); 808b4b0dcbf70d10f3acd6a88fca0679ca711066e0Nicholas Bellinger transport_kunmap_data_sg(cmd); 818b4b0dcbf70d10f3acd6a88fca0679ca711066e0Nicholas Bellinger } 821fd032ee10d2816c947f5d5b9abda95e728f0a8fChristoph Hellwig 831fd032ee10d2816c947f5d5b9abda95e728f0a8fChristoph Hellwig target_complete_cmd(cmd, GOOD); 841fd032ee10d2816c947f5d5b9abda95e728f0a8fChristoph Hellwig return 0; 851fd032ee10d2816c947f5d5b9abda95e728f0a8fChristoph Hellwig} 861fd032ee10d2816c947f5d5b9abda95e728f0a8fChristoph Hellwig 87de103c93aff0bed0ae984274e5dc8b95899badabChristoph Hellwigstatic sense_reason_t 88de103c93aff0bed0ae984274e5dc8b95899badabChristoph Hellwigsbc_emulate_readcapacity_16(struct se_cmd *cmd) 891fd032ee10d2816c947f5d5b9abda95e728f0a8fChristoph Hellwig{ 901fd032ee10d2816c947f5d5b9abda95e728f0a8fChristoph Hellwig struct se_device *dev = cmd->se_dev; 91a50da144d048f9dbebed2b1441ed779d6bbbcd03Paolo Bonzini unsigned char *rbuf; 92a50da144d048f9dbebed2b1441ed779d6bbbcd03Paolo Bonzini unsigned char buf[32]; 931fd032ee10d2816c947f5d5b9abda95e728f0a8fChristoph Hellwig unsigned long long blocks = dev->transport->get_blocks(dev); 941fd032ee10d2816c947f5d5b9abda95e728f0a8fChristoph Hellwig 95a50da144d048f9dbebed2b1441ed779d6bbbcd03Paolo Bonzini memset(buf, 0, sizeof(buf)); 961fd032ee10d2816c947f5d5b9abda95e728f0a8fChristoph Hellwig buf[0] = (blocks >> 56) & 0xff; 971fd032ee10d2816c947f5d5b9abda95e728f0a8fChristoph Hellwig buf[1] = (blocks >> 48) & 0xff; 981fd032ee10d2816c947f5d5b9abda95e728f0a8fChristoph Hellwig buf[2] = (blocks >> 40) & 0xff; 991fd032ee10d2816c947f5d5b9abda95e728f0a8fChristoph Hellwig buf[3] = (blocks >> 32) & 0xff; 1001fd032ee10d2816c947f5d5b9abda95e728f0a8fChristoph Hellwig buf[4] = (blocks >> 24) & 0xff; 1011fd032ee10d2816c947f5d5b9abda95e728f0a8fChristoph Hellwig buf[5] = (blocks >> 16) & 0xff; 1021fd032ee10d2816c947f5d5b9abda95e728f0a8fChristoph Hellwig buf[6] = (blocks >> 8) & 0xff; 1031fd032ee10d2816c947f5d5b9abda95e728f0a8fChristoph Hellwig buf[7] = blocks & 0xff; 1040fd97ccf45be26fb01b3a412f1f6c6b5044b2f16Christoph Hellwig buf[8] = (dev->dev_attrib.block_size >> 24) & 0xff; 1050fd97ccf45be26fb01b3a412f1f6c6b5044b2f16Christoph Hellwig buf[9] = (dev->dev_attrib.block_size >> 16) & 0xff; 1060fd97ccf45be26fb01b3a412f1f6c6b5044b2f16Christoph Hellwig buf[10] = (dev->dev_attrib.block_size >> 8) & 0xff; 1070fd97ccf45be26fb01b3a412f1f6c6b5044b2f16Christoph Hellwig buf[11] = dev->dev_attrib.block_size & 0xff; 1081fd032ee10d2816c947f5d5b9abda95e728f0a8fChristoph Hellwig /* 1091fd032ee10d2816c947f5d5b9abda95e728f0a8fChristoph Hellwig * Set Thin Provisioning Enable bit following sbc3r22 in section 1101fd032ee10d2816c947f5d5b9abda95e728f0a8fChristoph Hellwig * READ CAPACITY (16) byte 14 if emulate_tpu or emulate_tpws is enabled. 1111fd032ee10d2816c947f5d5b9abda95e728f0a8fChristoph Hellwig */ 1120fd97ccf45be26fb01b3a412f1f6c6b5044b2f16Christoph Hellwig if (dev->dev_attrib.emulate_tpu || dev->dev_attrib.emulate_tpws) 1131fd032ee10d2816c947f5d5b9abda95e728f0a8fChristoph Hellwig buf[14] = 0x80; 1141fd032ee10d2816c947f5d5b9abda95e728f0a8fChristoph Hellwig 115a50da144d048f9dbebed2b1441ed779d6bbbcd03Paolo Bonzini rbuf = transport_kmap_data_sg(cmd); 1168b4b0dcbf70d10f3acd6a88fca0679ca711066e0Nicholas Bellinger if (rbuf) { 1178b4b0dcbf70d10f3acd6a88fca0679ca711066e0Nicholas Bellinger memcpy(rbuf, buf, min_t(u32, sizeof(buf), cmd->data_length)); 1188b4b0dcbf70d10f3acd6a88fca0679ca711066e0Nicholas Bellinger transport_kunmap_data_sg(cmd); 1198b4b0dcbf70d10f3acd6a88fca0679ca711066e0Nicholas Bellinger } 1201fd032ee10d2816c947f5d5b9abda95e728f0a8fChristoph Hellwig 1211fd032ee10d2816c947f5d5b9abda95e728f0a8fChristoph Hellwig target_complete_cmd(cmd, GOOD); 1221fd032ee10d2816c947f5d5b9abda95e728f0a8fChristoph Hellwig return 0; 1231fd032ee10d2816c947f5d5b9abda95e728f0a8fChristoph Hellwig} 1241fd032ee10d2816c947f5d5b9abda95e728f0a8fChristoph Hellwig 125972b29c8f86093f44e1d781588bd5c5faae3d8e3Roland Dreiersector_t sbc_get_write_same_sectors(struct se_cmd *cmd) 1261fd032ee10d2816c947f5d5b9abda95e728f0a8fChristoph Hellwig{ 1271fd032ee10d2816c947f5d5b9abda95e728f0a8fChristoph Hellwig u32 num_blocks; 1281fd032ee10d2816c947f5d5b9abda95e728f0a8fChristoph Hellwig 1291fd032ee10d2816c947f5d5b9abda95e728f0a8fChristoph Hellwig if (cmd->t_task_cdb[0] == WRITE_SAME) 1301fd032ee10d2816c947f5d5b9abda95e728f0a8fChristoph Hellwig num_blocks = get_unaligned_be16(&cmd->t_task_cdb[7]); 1311fd032ee10d2816c947f5d5b9abda95e728f0a8fChristoph Hellwig else if (cmd->t_task_cdb[0] == WRITE_SAME_16) 1321fd032ee10d2816c947f5d5b9abda95e728f0a8fChristoph Hellwig num_blocks = get_unaligned_be32(&cmd->t_task_cdb[10]); 1331fd032ee10d2816c947f5d5b9abda95e728f0a8fChristoph Hellwig else /* WRITE_SAME_32 via VARIABLE_LENGTH_CMD */ 1341fd032ee10d2816c947f5d5b9abda95e728f0a8fChristoph Hellwig num_blocks = get_unaligned_be32(&cmd->t_task_cdb[28]); 1351fd032ee10d2816c947f5d5b9abda95e728f0a8fChristoph Hellwig 1361fd032ee10d2816c947f5d5b9abda95e728f0a8fChristoph Hellwig /* 1371fd032ee10d2816c947f5d5b9abda95e728f0a8fChristoph Hellwig * Use the explicit range when non zero is supplied, otherwise calculate 1381fd032ee10d2816c947f5d5b9abda95e728f0a8fChristoph Hellwig * the remaining range based on ->get_blocks() - starting LBA. 1391fd032ee10d2816c947f5d5b9abda95e728f0a8fChristoph Hellwig */ 1406f974e8ce7b3f661910a49c7c2ba095631f341e9Christoph Hellwig if (num_blocks) 1416f974e8ce7b3f661910a49c7c2ba095631f341e9Christoph Hellwig return num_blocks; 1421fd032ee10d2816c947f5d5b9abda95e728f0a8fChristoph Hellwig 1436f974e8ce7b3f661910a49c7c2ba095631f341e9Christoph Hellwig return cmd->se_dev->transport->get_blocks(cmd->se_dev) - 1446f974e8ce7b3f661910a49c7c2ba095631f341e9Christoph Hellwig cmd->t_task_lba + 1; 1451fd032ee10d2816c947f5d5b9abda95e728f0a8fChristoph Hellwig} 146972b29c8f86093f44e1d781588bd5c5faae3d8e3Roland DreierEXPORT_SYMBOL(sbc_get_write_same_sectors); 1471fd032ee10d2816c947f5d5b9abda95e728f0a8fChristoph Hellwig 148de103c93aff0bed0ae984274e5dc8b95899badabChristoph Hellwigstatic sense_reason_t 1491920ed61fbbbb38919edfb2427b0b1fd4e4ad8d9Nicholas Bellingersbc_emulate_noop(struct se_cmd *cmd) 1501a1ff38c4cebf23be8bf0009a76b082a13bd25cbBernhard Kohl{ 1511a1ff38c4cebf23be8bf0009a76b082a13bd25cbBernhard Kohl target_complete_cmd(cmd, GOOD); 1521a1ff38c4cebf23be8bf0009a76b082a13bd25cbBernhard Kohl return 0; 1531a1ff38c4cebf23be8bf0009a76b082a13bd25cbBernhard Kohl} 1541a1ff38c4cebf23be8bf0009a76b082a13bd25cbBernhard Kohl 155d6e0175cf3f9737a760482d185bb73566bcc9331Christoph Hellwigstatic inline u32 sbc_get_size(struct se_cmd *cmd, u32 sectors) 156d6e0175cf3f9737a760482d185bb73566bcc9331Christoph Hellwig{ 1570fd97ccf45be26fb01b3a412f1f6c6b5044b2f16Christoph Hellwig return cmd->se_dev->dev_attrib.block_size * sectors; 158d6e0175cf3f9737a760482d185bb73566bcc9331Christoph Hellwig} 159d6e0175cf3f9737a760482d185bb73566bcc9331Christoph Hellwig 160d6e0175cf3f9737a760482d185bb73566bcc9331Christoph Hellwigstatic int sbc_check_valid_sectors(struct se_cmd *cmd) 161d6e0175cf3f9737a760482d185bb73566bcc9331Christoph Hellwig{ 162d6e0175cf3f9737a760482d185bb73566bcc9331Christoph Hellwig struct se_device *dev = cmd->se_dev; 163d6e0175cf3f9737a760482d185bb73566bcc9331Christoph Hellwig unsigned long long end_lba; 164d6e0175cf3f9737a760482d185bb73566bcc9331Christoph Hellwig u32 sectors; 165d6e0175cf3f9737a760482d185bb73566bcc9331Christoph Hellwig 1660fd97ccf45be26fb01b3a412f1f6c6b5044b2f16Christoph Hellwig sectors = cmd->data_length / dev->dev_attrib.block_size; 167d6e0175cf3f9737a760482d185bb73566bcc9331Christoph Hellwig end_lba = dev->transport->get_blocks(dev) + 1; 168d6e0175cf3f9737a760482d185bb73566bcc9331Christoph Hellwig 169d6e0175cf3f9737a760482d185bb73566bcc9331Christoph Hellwig if (cmd->t_task_lba + sectors > end_lba) { 170d6e0175cf3f9737a760482d185bb73566bcc9331Christoph Hellwig pr_err("target: lba %llu, sectors %u exceeds end lba %llu\n", 171d6e0175cf3f9737a760482d185bb73566bcc9331Christoph Hellwig cmd->t_task_lba, sectors, end_lba); 172d6e0175cf3f9737a760482d185bb73566bcc9331Christoph Hellwig return -EINVAL; 173d6e0175cf3f9737a760482d185bb73566bcc9331Christoph Hellwig } 174d6e0175cf3f9737a760482d185bb73566bcc9331Christoph Hellwig 175d6e0175cf3f9737a760482d185bb73566bcc9331Christoph Hellwig return 0; 176d6e0175cf3f9737a760482d185bb73566bcc9331Christoph Hellwig} 177d6e0175cf3f9737a760482d185bb73566bcc9331Christoph Hellwig 178d6e0175cf3f9737a760482d185bb73566bcc9331Christoph Hellwigstatic inline u32 transport_get_sectors_6(unsigned char *cdb) 179d6e0175cf3f9737a760482d185bb73566bcc9331Christoph Hellwig{ 180d6e0175cf3f9737a760482d185bb73566bcc9331Christoph Hellwig /* 181d6e0175cf3f9737a760482d185bb73566bcc9331Christoph Hellwig * Use 8-bit sector value. SBC-3 says: 182d6e0175cf3f9737a760482d185bb73566bcc9331Christoph Hellwig * 183d6e0175cf3f9737a760482d185bb73566bcc9331Christoph Hellwig * A TRANSFER LENGTH field set to zero specifies that 256 184d6e0175cf3f9737a760482d185bb73566bcc9331Christoph Hellwig * logical blocks shall be written. Any other value 185d6e0175cf3f9737a760482d185bb73566bcc9331Christoph Hellwig * specifies the number of logical blocks that shall be 186d6e0175cf3f9737a760482d185bb73566bcc9331Christoph Hellwig * written. 187d6e0175cf3f9737a760482d185bb73566bcc9331Christoph Hellwig */ 188d6e0175cf3f9737a760482d185bb73566bcc9331Christoph Hellwig return cdb[4] ? : 256; 189d6e0175cf3f9737a760482d185bb73566bcc9331Christoph Hellwig} 190d6e0175cf3f9737a760482d185bb73566bcc9331Christoph Hellwig 191d6e0175cf3f9737a760482d185bb73566bcc9331Christoph Hellwigstatic inline u32 transport_get_sectors_10(unsigned char *cdb) 192d6e0175cf3f9737a760482d185bb73566bcc9331Christoph Hellwig{ 193d6e0175cf3f9737a760482d185bb73566bcc9331Christoph Hellwig return (u32)(cdb[7] << 8) + cdb[8]; 194d6e0175cf3f9737a760482d185bb73566bcc9331Christoph Hellwig} 195d6e0175cf3f9737a760482d185bb73566bcc9331Christoph Hellwig 196d6e0175cf3f9737a760482d185bb73566bcc9331Christoph Hellwigstatic inline u32 transport_get_sectors_12(unsigned char *cdb) 197d6e0175cf3f9737a760482d185bb73566bcc9331Christoph Hellwig{ 198d6e0175cf3f9737a760482d185bb73566bcc9331Christoph Hellwig return (u32)(cdb[6] << 24) + (cdb[7] << 16) + (cdb[8] << 8) + cdb[9]; 199d6e0175cf3f9737a760482d185bb73566bcc9331Christoph Hellwig} 200d6e0175cf3f9737a760482d185bb73566bcc9331Christoph Hellwig 201d6e0175cf3f9737a760482d185bb73566bcc9331Christoph Hellwigstatic inline u32 transport_get_sectors_16(unsigned char *cdb) 202d6e0175cf3f9737a760482d185bb73566bcc9331Christoph Hellwig{ 203d6e0175cf3f9737a760482d185bb73566bcc9331Christoph Hellwig return (u32)(cdb[10] << 24) + (cdb[11] << 16) + 204d6e0175cf3f9737a760482d185bb73566bcc9331Christoph Hellwig (cdb[12] << 8) + cdb[13]; 205d6e0175cf3f9737a760482d185bb73566bcc9331Christoph Hellwig} 206d6e0175cf3f9737a760482d185bb73566bcc9331Christoph Hellwig 207d6e0175cf3f9737a760482d185bb73566bcc9331Christoph Hellwig/* 208d6e0175cf3f9737a760482d185bb73566bcc9331Christoph Hellwig * Used for VARIABLE_LENGTH_CDB WRITE_32 and READ_32 variants 209d6e0175cf3f9737a760482d185bb73566bcc9331Christoph Hellwig */ 210d6e0175cf3f9737a760482d185bb73566bcc9331Christoph Hellwigstatic inline u32 transport_get_sectors_32(unsigned char *cdb) 211d6e0175cf3f9737a760482d185bb73566bcc9331Christoph Hellwig{ 212d6e0175cf3f9737a760482d185bb73566bcc9331Christoph Hellwig return (u32)(cdb[28] << 24) + (cdb[29] << 16) + 213d6e0175cf3f9737a760482d185bb73566bcc9331Christoph Hellwig (cdb[30] << 8) + cdb[31]; 214d6e0175cf3f9737a760482d185bb73566bcc9331Christoph Hellwig 215d6e0175cf3f9737a760482d185bb73566bcc9331Christoph Hellwig} 216d6e0175cf3f9737a760482d185bb73566bcc9331Christoph Hellwig 217d6e0175cf3f9737a760482d185bb73566bcc9331Christoph Hellwigstatic inline u32 transport_lba_21(unsigned char *cdb) 218d6e0175cf3f9737a760482d185bb73566bcc9331Christoph Hellwig{ 219d6e0175cf3f9737a760482d185bb73566bcc9331Christoph Hellwig return ((cdb[1] & 0x1f) << 16) | (cdb[2] << 8) | cdb[3]; 220d6e0175cf3f9737a760482d185bb73566bcc9331Christoph Hellwig} 221d6e0175cf3f9737a760482d185bb73566bcc9331Christoph Hellwig 222d6e0175cf3f9737a760482d185bb73566bcc9331Christoph Hellwigstatic inline u32 transport_lba_32(unsigned char *cdb) 223d6e0175cf3f9737a760482d185bb73566bcc9331Christoph Hellwig{ 224d6e0175cf3f9737a760482d185bb73566bcc9331Christoph Hellwig return (cdb[2] << 24) | (cdb[3] << 16) | (cdb[4] << 8) | cdb[5]; 225d6e0175cf3f9737a760482d185bb73566bcc9331Christoph Hellwig} 226d6e0175cf3f9737a760482d185bb73566bcc9331Christoph Hellwig 227d6e0175cf3f9737a760482d185bb73566bcc9331Christoph Hellwigstatic inline unsigned long long transport_lba_64(unsigned char *cdb) 228d6e0175cf3f9737a760482d185bb73566bcc9331Christoph Hellwig{ 229d6e0175cf3f9737a760482d185bb73566bcc9331Christoph Hellwig unsigned int __v1, __v2; 230d6e0175cf3f9737a760482d185bb73566bcc9331Christoph Hellwig 231d6e0175cf3f9737a760482d185bb73566bcc9331Christoph Hellwig __v1 = (cdb[2] << 24) | (cdb[3] << 16) | (cdb[4] << 8) | cdb[5]; 232d6e0175cf3f9737a760482d185bb73566bcc9331Christoph Hellwig __v2 = (cdb[6] << 24) | (cdb[7] << 16) | (cdb[8] << 8) | cdb[9]; 233d6e0175cf3f9737a760482d185bb73566bcc9331Christoph Hellwig 234d6e0175cf3f9737a760482d185bb73566bcc9331Christoph Hellwig return ((unsigned long long)__v2) | (unsigned long long)__v1 << 32; 235d6e0175cf3f9737a760482d185bb73566bcc9331Christoph Hellwig} 236d6e0175cf3f9737a760482d185bb73566bcc9331Christoph Hellwig 237d6e0175cf3f9737a760482d185bb73566bcc9331Christoph Hellwig/* 238d6e0175cf3f9737a760482d185bb73566bcc9331Christoph Hellwig * For VARIABLE_LENGTH_CDB w/ 32 byte extended CDBs 239d6e0175cf3f9737a760482d185bb73566bcc9331Christoph Hellwig */ 240d6e0175cf3f9737a760482d185bb73566bcc9331Christoph Hellwigstatic inline unsigned long long transport_lba_64_ext(unsigned char *cdb) 241d6e0175cf3f9737a760482d185bb73566bcc9331Christoph Hellwig{ 242d6e0175cf3f9737a760482d185bb73566bcc9331Christoph Hellwig unsigned int __v1, __v2; 243d6e0175cf3f9737a760482d185bb73566bcc9331Christoph Hellwig 244d6e0175cf3f9737a760482d185bb73566bcc9331Christoph Hellwig __v1 = (cdb[12] << 24) | (cdb[13] << 16) | (cdb[14] << 8) | cdb[15]; 245d6e0175cf3f9737a760482d185bb73566bcc9331Christoph Hellwig __v2 = (cdb[16] << 24) | (cdb[17] << 16) | (cdb[18] << 8) | cdb[19]; 246d6e0175cf3f9737a760482d185bb73566bcc9331Christoph Hellwig 247d6e0175cf3f9737a760482d185bb73566bcc9331Christoph Hellwig return ((unsigned long long)__v2) | (unsigned long long)__v1 << 32; 248d6e0175cf3f9737a760482d185bb73566bcc9331Christoph Hellwig} 249d6e0175cf3f9737a760482d185bb73566bcc9331Christoph Hellwig 250cd063bef414c51d79b9c6ea7a8ef8f9d319529bcNicholas Bellingerstatic sense_reason_t 251cd063bef414c51d79b9c6ea7a8ef8f9d319529bcNicholas Bellingersbc_setup_write_same(struct se_cmd *cmd, unsigned char *flags, struct sbc_ops *ops) 252d6e0175cf3f9737a760482d185bb73566bcc9331Christoph Hellwig{ 253972b29c8f86093f44e1d781588bd5c5faae3d8e3Roland Dreier unsigned int sectors = sbc_get_write_same_sectors(cmd); 254773cbaf7460aa58c67d4dca83c3f8bca10323bbeNicholas Bellinger 255d6e0175cf3f9737a760482d185bb73566bcc9331Christoph Hellwig if ((flags[0] & 0x04) || (flags[0] & 0x02)) { 256d6e0175cf3f9737a760482d185bb73566bcc9331Christoph Hellwig pr_err("WRITE_SAME PBDATA and LBDATA" 257d6e0175cf3f9737a760482d185bb73566bcc9331Christoph Hellwig " bits not supported for Block Discard" 258d6e0175cf3f9737a760482d185bb73566bcc9331Christoph Hellwig " Emulation\n"); 259cd063bef414c51d79b9c6ea7a8ef8f9d319529bcNicholas Bellinger return TCM_UNSUPPORTED_SCSI_OPCODE; 260d6e0175cf3f9737a760482d185bb73566bcc9331Christoph Hellwig } 261773cbaf7460aa58c67d4dca83c3f8bca10323bbeNicholas Bellinger if (sectors > cmd->se_dev->dev_attrib.max_write_same_len) { 262773cbaf7460aa58c67d4dca83c3f8bca10323bbeNicholas Bellinger pr_warn("WRITE_SAME sectors: %u exceeds max_write_same_len: %u\n", 263773cbaf7460aa58c67d4dca83c3f8bca10323bbeNicholas Bellinger sectors, cmd->se_dev->dev_attrib.max_write_same_len); 264773cbaf7460aa58c67d4dca83c3f8bca10323bbeNicholas Bellinger return TCM_INVALID_CDB_FIELD; 265773cbaf7460aa58c67d4dca83c3f8bca10323bbeNicholas Bellinger } 266d6e0175cf3f9737a760482d185bb73566bcc9331Christoph Hellwig /* 267cd063bef414c51d79b9c6ea7a8ef8f9d319529bcNicholas Bellinger * Special case for WRITE_SAME w/ UNMAP=1 that ends up getting 268cd063bef414c51d79b9c6ea7a8ef8f9d319529bcNicholas Bellinger * translated into block discard requests within backend code. 269d6e0175cf3f9737a760482d185bb73566bcc9331Christoph Hellwig */ 270cd063bef414c51d79b9c6ea7a8ef8f9d319529bcNicholas Bellinger if (flags[0] & 0x08) { 271cd063bef414c51d79b9c6ea7a8ef8f9d319529bcNicholas Bellinger if (!ops->execute_write_same_unmap) 272cd063bef414c51d79b9c6ea7a8ef8f9d319529bcNicholas Bellinger return TCM_UNSUPPORTED_SCSI_OPCODE; 273cd063bef414c51d79b9c6ea7a8ef8f9d319529bcNicholas Bellinger 274cd063bef414c51d79b9c6ea7a8ef8f9d319529bcNicholas Bellinger cmd->execute_cmd = ops->execute_write_same_unmap; 275cd063bef414c51d79b9c6ea7a8ef8f9d319529bcNicholas Bellinger return 0; 276d6e0175cf3f9737a760482d185bb73566bcc9331Christoph Hellwig } 277cd063bef414c51d79b9c6ea7a8ef8f9d319529bcNicholas Bellinger if (!ops->execute_write_same) 278cd063bef414c51d79b9c6ea7a8ef8f9d319529bcNicholas Bellinger return TCM_UNSUPPORTED_SCSI_OPCODE; 279d6e0175cf3f9737a760482d185bb73566bcc9331Christoph Hellwig 280cd063bef414c51d79b9c6ea7a8ef8f9d319529bcNicholas Bellinger cmd->execute_cmd = ops->execute_write_same; 281d6e0175cf3f9737a760482d185bb73566bcc9331Christoph Hellwig return 0; 282d6e0175cf3f9737a760482d185bb73566bcc9331Christoph Hellwig} 283d6e0175cf3f9737a760482d185bb73566bcc9331Christoph Hellwig 284a6b0133c19af1ab268ed1f4414efa2782896a870Nicholas Bellingerstatic sense_reason_t xdreadwrite_callback(struct se_cmd *cmd) 285d6e0175cf3f9737a760482d185bb73566bcc9331Christoph Hellwig{ 286d6e0175cf3f9737a760482d185bb73566bcc9331Christoph Hellwig unsigned char *buf, *addr; 287d6e0175cf3f9737a760482d185bb73566bcc9331Christoph Hellwig struct scatterlist *sg; 288d6e0175cf3f9737a760482d185bb73566bcc9331Christoph Hellwig unsigned int offset; 289a6b0133c19af1ab268ed1f4414efa2782896a870Nicholas Bellinger sense_reason_t ret = TCM_NO_SENSE; 290a6b0133c19af1ab268ed1f4414efa2782896a870Nicholas Bellinger int i, count; 291d6e0175cf3f9737a760482d185bb73566bcc9331Christoph Hellwig /* 292d6e0175cf3f9737a760482d185bb73566bcc9331Christoph Hellwig * From sbc3r22.pdf section 5.48 XDWRITEREAD (10) command 293d6e0175cf3f9737a760482d185bb73566bcc9331Christoph Hellwig * 294d6e0175cf3f9737a760482d185bb73566bcc9331Christoph Hellwig * 1) read the specified logical block(s); 295d6e0175cf3f9737a760482d185bb73566bcc9331Christoph Hellwig * 2) transfer logical blocks from the data-out buffer; 296d6e0175cf3f9737a760482d185bb73566bcc9331Christoph Hellwig * 3) XOR the logical blocks transferred from the data-out buffer with 297d6e0175cf3f9737a760482d185bb73566bcc9331Christoph Hellwig * the logical blocks read, storing the resulting XOR data in a buffer; 298d6e0175cf3f9737a760482d185bb73566bcc9331Christoph Hellwig * 4) if the DISABLE WRITE bit is set to zero, then write the logical 299d6e0175cf3f9737a760482d185bb73566bcc9331Christoph Hellwig * blocks transferred from the data-out buffer; and 300d6e0175cf3f9737a760482d185bb73566bcc9331Christoph Hellwig * 5) transfer the resulting XOR data to the data-in buffer. 301d6e0175cf3f9737a760482d185bb73566bcc9331Christoph Hellwig */ 302d6e0175cf3f9737a760482d185bb73566bcc9331Christoph Hellwig buf = kmalloc(cmd->data_length, GFP_KERNEL); 303d6e0175cf3f9737a760482d185bb73566bcc9331Christoph Hellwig if (!buf) { 304d6e0175cf3f9737a760482d185bb73566bcc9331Christoph Hellwig pr_err("Unable to allocate xor_callback buf\n"); 305a6b0133c19af1ab268ed1f4414efa2782896a870Nicholas Bellinger return TCM_OUT_OF_RESOURCES; 306d6e0175cf3f9737a760482d185bb73566bcc9331Christoph Hellwig } 307d6e0175cf3f9737a760482d185bb73566bcc9331Christoph Hellwig /* 308d6e0175cf3f9737a760482d185bb73566bcc9331Christoph Hellwig * Copy the scatterlist WRITE buffer located at cmd->t_data_sg 309d6e0175cf3f9737a760482d185bb73566bcc9331Christoph Hellwig * into the locally allocated *buf 310d6e0175cf3f9737a760482d185bb73566bcc9331Christoph Hellwig */ 311d6e0175cf3f9737a760482d185bb73566bcc9331Christoph Hellwig sg_copy_to_buffer(cmd->t_data_sg, 312d6e0175cf3f9737a760482d185bb73566bcc9331Christoph Hellwig cmd->t_data_nents, 313d6e0175cf3f9737a760482d185bb73566bcc9331Christoph Hellwig buf, 314d6e0175cf3f9737a760482d185bb73566bcc9331Christoph Hellwig cmd->data_length); 315d6e0175cf3f9737a760482d185bb73566bcc9331Christoph Hellwig 316d6e0175cf3f9737a760482d185bb73566bcc9331Christoph Hellwig /* 317d6e0175cf3f9737a760482d185bb73566bcc9331Christoph Hellwig * Now perform the XOR against the BIDI read memory located at 318d6e0175cf3f9737a760482d185bb73566bcc9331Christoph Hellwig * cmd->t_mem_bidi_list 319d6e0175cf3f9737a760482d185bb73566bcc9331Christoph Hellwig */ 320d6e0175cf3f9737a760482d185bb73566bcc9331Christoph Hellwig 321d6e0175cf3f9737a760482d185bb73566bcc9331Christoph Hellwig offset = 0; 322d6e0175cf3f9737a760482d185bb73566bcc9331Christoph Hellwig for_each_sg(cmd->t_bidi_data_sg, sg, cmd->t_bidi_data_nents, count) { 323d6e0175cf3f9737a760482d185bb73566bcc9331Christoph Hellwig addr = kmap_atomic(sg_page(sg)); 324a6b0133c19af1ab268ed1f4414efa2782896a870Nicholas Bellinger if (!addr) { 325a6b0133c19af1ab268ed1f4414efa2782896a870Nicholas Bellinger ret = TCM_OUT_OF_RESOURCES; 326d6e0175cf3f9737a760482d185bb73566bcc9331Christoph Hellwig goto out; 327a6b0133c19af1ab268ed1f4414efa2782896a870Nicholas Bellinger } 328d6e0175cf3f9737a760482d185bb73566bcc9331Christoph Hellwig 329d6e0175cf3f9737a760482d185bb73566bcc9331Christoph Hellwig for (i = 0; i < sg->length; i++) 330d6e0175cf3f9737a760482d185bb73566bcc9331Christoph Hellwig *(addr + sg->offset + i) ^= *(buf + offset + i); 331d6e0175cf3f9737a760482d185bb73566bcc9331Christoph Hellwig 332d6e0175cf3f9737a760482d185bb73566bcc9331Christoph Hellwig offset += sg->length; 333d6e0175cf3f9737a760482d185bb73566bcc9331Christoph Hellwig kunmap_atomic(addr); 334d6e0175cf3f9737a760482d185bb73566bcc9331Christoph Hellwig } 335d6e0175cf3f9737a760482d185bb73566bcc9331Christoph Hellwig 336d6e0175cf3f9737a760482d185bb73566bcc9331Christoph Hellwigout: 337d6e0175cf3f9737a760482d185bb73566bcc9331Christoph Hellwig kfree(buf); 338a6b0133c19af1ab268ed1f4414efa2782896a870Nicholas Bellinger return ret; 339d6e0175cf3f9737a760482d185bb73566bcc9331Christoph Hellwig} 340d6e0175cf3f9737a760482d185bb73566bcc9331Christoph Hellwig 341a82a9538dd30471e6428a2d55e91e986c439866bNicholas Bellingerstatic sense_reason_t 342a82a9538dd30471e6428a2d55e91e986c439866bNicholas Bellingersbc_execute_rw(struct se_cmd *cmd) 343a82a9538dd30471e6428a2d55e91e986c439866bNicholas Bellinger{ 344a82a9538dd30471e6428a2d55e91e986c439866bNicholas Bellinger return cmd->execute_rw(cmd, cmd->t_data_sg, cmd->t_data_nents, 345a82a9538dd30471e6428a2d55e91e986c439866bNicholas Bellinger cmd->data_direction); 346a82a9538dd30471e6428a2d55e91e986c439866bNicholas Bellinger} 347a82a9538dd30471e6428a2d55e91e986c439866bNicholas Bellinger 34868ff9b9b27525cdaaea81890456f65aed5ce0b70Nicholas Bellingerstatic sense_reason_t compare_and_write_post(struct se_cmd *cmd) 34968ff9b9b27525cdaaea81890456f65aed5ce0b70Nicholas Bellinger{ 35068ff9b9b27525cdaaea81890456f65aed5ce0b70Nicholas Bellinger struct se_device *dev = cmd->se_dev; 35168ff9b9b27525cdaaea81890456f65aed5ce0b70Nicholas Bellinger 35268ff9b9b27525cdaaea81890456f65aed5ce0b70Nicholas Bellinger cmd->se_cmd_flags |= SCF_COMPARE_AND_WRITE_POST; 35368ff9b9b27525cdaaea81890456f65aed5ce0b70Nicholas Bellinger /* 35468ff9b9b27525cdaaea81890456f65aed5ce0b70Nicholas Bellinger * Unlock ->caw_sem originally obtained during sbc_compare_and_write() 35568ff9b9b27525cdaaea81890456f65aed5ce0b70Nicholas Bellinger * before the original READ I/O submission. 35668ff9b9b27525cdaaea81890456f65aed5ce0b70Nicholas Bellinger */ 35768ff9b9b27525cdaaea81890456f65aed5ce0b70Nicholas Bellinger up(&dev->caw_sem); 35868ff9b9b27525cdaaea81890456f65aed5ce0b70Nicholas Bellinger 35968ff9b9b27525cdaaea81890456f65aed5ce0b70Nicholas Bellinger return TCM_NO_SENSE; 36068ff9b9b27525cdaaea81890456f65aed5ce0b70Nicholas Bellinger} 36168ff9b9b27525cdaaea81890456f65aed5ce0b70Nicholas Bellinger 36268ff9b9b27525cdaaea81890456f65aed5ce0b70Nicholas Bellingerstatic sense_reason_t compare_and_write_callback(struct se_cmd *cmd) 36368ff9b9b27525cdaaea81890456f65aed5ce0b70Nicholas Bellinger{ 36468ff9b9b27525cdaaea81890456f65aed5ce0b70Nicholas Bellinger struct se_device *dev = cmd->se_dev; 36568ff9b9b27525cdaaea81890456f65aed5ce0b70Nicholas Bellinger struct scatterlist *write_sg = NULL, *sg; 36668ff9b9b27525cdaaea81890456f65aed5ce0b70Nicholas Bellinger unsigned char *buf, *addr; 36768ff9b9b27525cdaaea81890456f65aed5ce0b70Nicholas Bellinger struct sg_mapping_iter m; 36868ff9b9b27525cdaaea81890456f65aed5ce0b70Nicholas Bellinger unsigned int offset = 0, len; 36968ff9b9b27525cdaaea81890456f65aed5ce0b70Nicholas Bellinger unsigned int nlbas = cmd->t_task_nolb; 37068ff9b9b27525cdaaea81890456f65aed5ce0b70Nicholas Bellinger unsigned int block_size = dev->dev_attrib.block_size; 37168ff9b9b27525cdaaea81890456f65aed5ce0b70Nicholas Bellinger unsigned int compare_len = (nlbas * block_size); 37268ff9b9b27525cdaaea81890456f65aed5ce0b70Nicholas Bellinger sense_reason_t ret = TCM_NO_SENSE; 37368ff9b9b27525cdaaea81890456f65aed5ce0b70Nicholas Bellinger int rc, i; 37468ff9b9b27525cdaaea81890456f65aed5ce0b70Nicholas Bellinger 37568ff9b9b27525cdaaea81890456f65aed5ce0b70Nicholas Bellinger buf = kzalloc(cmd->data_length, GFP_KERNEL); 37668ff9b9b27525cdaaea81890456f65aed5ce0b70Nicholas Bellinger if (!buf) { 37768ff9b9b27525cdaaea81890456f65aed5ce0b70Nicholas Bellinger pr_err("Unable to allocate compare_and_write buf\n"); 37868ff9b9b27525cdaaea81890456f65aed5ce0b70Nicholas Bellinger return TCM_OUT_OF_RESOURCES; 37968ff9b9b27525cdaaea81890456f65aed5ce0b70Nicholas Bellinger } 38068ff9b9b27525cdaaea81890456f65aed5ce0b70Nicholas Bellinger 38168ff9b9b27525cdaaea81890456f65aed5ce0b70Nicholas Bellinger write_sg = kzalloc(sizeof(struct scatterlist) * cmd->t_data_nents, 38268ff9b9b27525cdaaea81890456f65aed5ce0b70Nicholas Bellinger GFP_KERNEL); 38368ff9b9b27525cdaaea81890456f65aed5ce0b70Nicholas Bellinger if (!write_sg) { 38468ff9b9b27525cdaaea81890456f65aed5ce0b70Nicholas Bellinger pr_err("Unable to allocate compare_and_write sg\n"); 38568ff9b9b27525cdaaea81890456f65aed5ce0b70Nicholas Bellinger ret = TCM_OUT_OF_RESOURCES; 38668ff9b9b27525cdaaea81890456f65aed5ce0b70Nicholas Bellinger goto out; 38768ff9b9b27525cdaaea81890456f65aed5ce0b70Nicholas Bellinger } 38868ff9b9b27525cdaaea81890456f65aed5ce0b70Nicholas Bellinger /* 38968ff9b9b27525cdaaea81890456f65aed5ce0b70Nicholas Bellinger * Setup verify and write data payloads from total NumberLBAs. 39068ff9b9b27525cdaaea81890456f65aed5ce0b70Nicholas Bellinger */ 39168ff9b9b27525cdaaea81890456f65aed5ce0b70Nicholas Bellinger rc = sg_copy_to_buffer(cmd->t_data_sg, cmd->t_data_nents, buf, 39268ff9b9b27525cdaaea81890456f65aed5ce0b70Nicholas Bellinger cmd->data_length); 39368ff9b9b27525cdaaea81890456f65aed5ce0b70Nicholas Bellinger if (!rc) { 39468ff9b9b27525cdaaea81890456f65aed5ce0b70Nicholas Bellinger pr_err("sg_copy_to_buffer() failed for compare_and_write\n"); 39568ff9b9b27525cdaaea81890456f65aed5ce0b70Nicholas Bellinger ret = TCM_OUT_OF_RESOURCES; 39668ff9b9b27525cdaaea81890456f65aed5ce0b70Nicholas Bellinger goto out; 39768ff9b9b27525cdaaea81890456f65aed5ce0b70Nicholas Bellinger } 39868ff9b9b27525cdaaea81890456f65aed5ce0b70Nicholas Bellinger /* 39968ff9b9b27525cdaaea81890456f65aed5ce0b70Nicholas Bellinger * Compare against SCSI READ payload against verify payload 40068ff9b9b27525cdaaea81890456f65aed5ce0b70Nicholas Bellinger */ 40168ff9b9b27525cdaaea81890456f65aed5ce0b70Nicholas Bellinger for_each_sg(cmd->t_bidi_data_sg, sg, cmd->t_bidi_data_nents, i) { 40268ff9b9b27525cdaaea81890456f65aed5ce0b70Nicholas Bellinger addr = (unsigned char *)kmap_atomic(sg_page(sg)); 40368ff9b9b27525cdaaea81890456f65aed5ce0b70Nicholas Bellinger if (!addr) { 40468ff9b9b27525cdaaea81890456f65aed5ce0b70Nicholas Bellinger ret = TCM_OUT_OF_RESOURCES; 40568ff9b9b27525cdaaea81890456f65aed5ce0b70Nicholas Bellinger goto out; 40668ff9b9b27525cdaaea81890456f65aed5ce0b70Nicholas Bellinger } 40768ff9b9b27525cdaaea81890456f65aed5ce0b70Nicholas Bellinger 40868ff9b9b27525cdaaea81890456f65aed5ce0b70Nicholas Bellinger len = min(sg->length, compare_len); 40968ff9b9b27525cdaaea81890456f65aed5ce0b70Nicholas Bellinger 41068ff9b9b27525cdaaea81890456f65aed5ce0b70Nicholas Bellinger if (memcmp(addr, buf + offset, len)) { 41168ff9b9b27525cdaaea81890456f65aed5ce0b70Nicholas Bellinger pr_warn("Detected MISCOMPARE for addr: %p buf: %p\n", 41268ff9b9b27525cdaaea81890456f65aed5ce0b70Nicholas Bellinger addr, buf + offset); 41368ff9b9b27525cdaaea81890456f65aed5ce0b70Nicholas Bellinger kunmap_atomic(addr); 41468ff9b9b27525cdaaea81890456f65aed5ce0b70Nicholas Bellinger goto miscompare; 41568ff9b9b27525cdaaea81890456f65aed5ce0b70Nicholas Bellinger } 41668ff9b9b27525cdaaea81890456f65aed5ce0b70Nicholas Bellinger kunmap_atomic(addr); 41768ff9b9b27525cdaaea81890456f65aed5ce0b70Nicholas Bellinger 41868ff9b9b27525cdaaea81890456f65aed5ce0b70Nicholas Bellinger offset += len; 41968ff9b9b27525cdaaea81890456f65aed5ce0b70Nicholas Bellinger compare_len -= len; 42068ff9b9b27525cdaaea81890456f65aed5ce0b70Nicholas Bellinger if (!compare_len) 42168ff9b9b27525cdaaea81890456f65aed5ce0b70Nicholas Bellinger break; 42268ff9b9b27525cdaaea81890456f65aed5ce0b70Nicholas Bellinger } 42368ff9b9b27525cdaaea81890456f65aed5ce0b70Nicholas Bellinger 42468ff9b9b27525cdaaea81890456f65aed5ce0b70Nicholas Bellinger i = 0; 42568ff9b9b27525cdaaea81890456f65aed5ce0b70Nicholas Bellinger len = cmd->t_task_nolb * block_size; 42668ff9b9b27525cdaaea81890456f65aed5ce0b70Nicholas Bellinger sg_miter_start(&m, cmd->t_data_sg, cmd->t_data_nents, SG_MITER_TO_SG); 42768ff9b9b27525cdaaea81890456f65aed5ce0b70Nicholas Bellinger /* 42868ff9b9b27525cdaaea81890456f65aed5ce0b70Nicholas Bellinger * Currently assumes NoLB=1 and SGLs are PAGE_SIZE.. 42968ff9b9b27525cdaaea81890456f65aed5ce0b70Nicholas Bellinger */ 43068ff9b9b27525cdaaea81890456f65aed5ce0b70Nicholas Bellinger while (len) { 43168ff9b9b27525cdaaea81890456f65aed5ce0b70Nicholas Bellinger sg_miter_next(&m); 43268ff9b9b27525cdaaea81890456f65aed5ce0b70Nicholas Bellinger 43368ff9b9b27525cdaaea81890456f65aed5ce0b70Nicholas Bellinger if (block_size < PAGE_SIZE) { 43468ff9b9b27525cdaaea81890456f65aed5ce0b70Nicholas Bellinger sg_set_page(&write_sg[i], m.page, block_size, 43568ff9b9b27525cdaaea81890456f65aed5ce0b70Nicholas Bellinger block_size); 43668ff9b9b27525cdaaea81890456f65aed5ce0b70Nicholas Bellinger } else { 43768ff9b9b27525cdaaea81890456f65aed5ce0b70Nicholas Bellinger sg_miter_next(&m); 43868ff9b9b27525cdaaea81890456f65aed5ce0b70Nicholas Bellinger sg_set_page(&write_sg[i], m.page, block_size, 43968ff9b9b27525cdaaea81890456f65aed5ce0b70Nicholas Bellinger 0); 44068ff9b9b27525cdaaea81890456f65aed5ce0b70Nicholas Bellinger } 44168ff9b9b27525cdaaea81890456f65aed5ce0b70Nicholas Bellinger len -= block_size; 44268ff9b9b27525cdaaea81890456f65aed5ce0b70Nicholas Bellinger i++; 44368ff9b9b27525cdaaea81890456f65aed5ce0b70Nicholas Bellinger } 44468ff9b9b27525cdaaea81890456f65aed5ce0b70Nicholas Bellinger sg_miter_stop(&m); 44568ff9b9b27525cdaaea81890456f65aed5ce0b70Nicholas Bellinger /* 44668ff9b9b27525cdaaea81890456f65aed5ce0b70Nicholas Bellinger * Save the original SGL + nents values before updating to new 44768ff9b9b27525cdaaea81890456f65aed5ce0b70Nicholas Bellinger * assignments, to be released in transport_free_pages() -> 44868ff9b9b27525cdaaea81890456f65aed5ce0b70Nicholas Bellinger * transport_reset_sgl_orig() 44968ff9b9b27525cdaaea81890456f65aed5ce0b70Nicholas Bellinger */ 45068ff9b9b27525cdaaea81890456f65aed5ce0b70Nicholas Bellinger cmd->t_data_sg_orig = cmd->t_data_sg; 45168ff9b9b27525cdaaea81890456f65aed5ce0b70Nicholas Bellinger cmd->t_data_sg = write_sg; 45268ff9b9b27525cdaaea81890456f65aed5ce0b70Nicholas Bellinger cmd->t_data_nents_orig = cmd->t_data_nents; 45368ff9b9b27525cdaaea81890456f65aed5ce0b70Nicholas Bellinger cmd->t_data_nents = 1; 45468ff9b9b27525cdaaea81890456f65aed5ce0b70Nicholas Bellinger 45568ff9b9b27525cdaaea81890456f65aed5ce0b70Nicholas Bellinger cmd->sam_task_attr = MSG_HEAD_TAG; 45668ff9b9b27525cdaaea81890456f65aed5ce0b70Nicholas Bellinger cmd->transport_complete_callback = compare_and_write_post; 45768ff9b9b27525cdaaea81890456f65aed5ce0b70Nicholas Bellinger /* 45868ff9b9b27525cdaaea81890456f65aed5ce0b70Nicholas Bellinger * Now reset ->execute_cmd() to the normal sbc_execute_rw() handler 45968ff9b9b27525cdaaea81890456f65aed5ce0b70Nicholas Bellinger * for submitting the adjusted SGL to write instance user-data. 46068ff9b9b27525cdaaea81890456f65aed5ce0b70Nicholas Bellinger */ 46168ff9b9b27525cdaaea81890456f65aed5ce0b70Nicholas Bellinger cmd->execute_cmd = sbc_execute_rw; 46268ff9b9b27525cdaaea81890456f65aed5ce0b70Nicholas Bellinger 46368ff9b9b27525cdaaea81890456f65aed5ce0b70Nicholas Bellinger spin_lock_irq(&cmd->t_state_lock); 46468ff9b9b27525cdaaea81890456f65aed5ce0b70Nicholas Bellinger cmd->t_state = TRANSPORT_PROCESSING; 46568ff9b9b27525cdaaea81890456f65aed5ce0b70Nicholas Bellinger cmd->transport_state |= CMD_T_ACTIVE|CMD_T_BUSY|CMD_T_SENT; 46668ff9b9b27525cdaaea81890456f65aed5ce0b70Nicholas Bellinger spin_unlock_irq(&cmd->t_state_lock); 46768ff9b9b27525cdaaea81890456f65aed5ce0b70Nicholas Bellinger 46868ff9b9b27525cdaaea81890456f65aed5ce0b70Nicholas Bellinger __target_execute_cmd(cmd); 46968ff9b9b27525cdaaea81890456f65aed5ce0b70Nicholas Bellinger 47068ff9b9b27525cdaaea81890456f65aed5ce0b70Nicholas Bellinger kfree(buf); 47168ff9b9b27525cdaaea81890456f65aed5ce0b70Nicholas Bellinger return ret; 47268ff9b9b27525cdaaea81890456f65aed5ce0b70Nicholas Bellinger 47368ff9b9b27525cdaaea81890456f65aed5ce0b70Nicholas Bellingermiscompare: 47468ff9b9b27525cdaaea81890456f65aed5ce0b70Nicholas Bellinger pr_warn("Target/%s: Send MISCOMPARE check condition and sense\n", 47568ff9b9b27525cdaaea81890456f65aed5ce0b70Nicholas Bellinger dev->transport->name); 47668ff9b9b27525cdaaea81890456f65aed5ce0b70Nicholas Bellinger ret = TCM_MISCOMPARE_VERIFY; 47768ff9b9b27525cdaaea81890456f65aed5ce0b70Nicholas Bellingerout: 47868ff9b9b27525cdaaea81890456f65aed5ce0b70Nicholas Bellinger /* 47968ff9b9b27525cdaaea81890456f65aed5ce0b70Nicholas Bellinger * In the MISCOMPARE or failure case, unlock ->caw_sem obtained in 48068ff9b9b27525cdaaea81890456f65aed5ce0b70Nicholas Bellinger * sbc_compare_and_write() before the original READ I/O submission. 48168ff9b9b27525cdaaea81890456f65aed5ce0b70Nicholas Bellinger */ 48268ff9b9b27525cdaaea81890456f65aed5ce0b70Nicholas Bellinger up(&dev->caw_sem); 48368ff9b9b27525cdaaea81890456f65aed5ce0b70Nicholas Bellinger kfree(write_sg); 48468ff9b9b27525cdaaea81890456f65aed5ce0b70Nicholas Bellinger kfree(buf); 48568ff9b9b27525cdaaea81890456f65aed5ce0b70Nicholas Bellinger return ret; 48668ff9b9b27525cdaaea81890456f65aed5ce0b70Nicholas Bellinger} 48768ff9b9b27525cdaaea81890456f65aed5ce0b70Nicholas Bellinger 48868ff9b9b27525cdaaea81890456f65aed5ce0b70Nicholas Bellingerstatic sense_reason_t 48968ff9b9b27525cdaaea81890456f65aed5ce0b70Nicholas Bellingersbc_compare_and_write(struct se_cmd *cmd) 49068ff9b9b27525cdaaea81890456f65aed5ce0b70Nicholas Bellinger{ 49168ff9b9b27525cdaaea81890456f65aed5ce0b70Nicholas Bellinger struct se_device *dev = cmd->se_dev; 49268ff9b9b27525cdaaea81890456f65aed5ce0b70Nicholas Bellinger sense_reason_t ret; 49368ff9b9b27525cdaaea81890456f65aed5ce0b70Nicholas Bellinger int rc; 49468ff9b9b27525cdaaea81890456f65aed5ce0b70Nicholas Bellinger /* 49568ff9b9b27525cdaaea81890456f65aed5ce0b70Nicholas Bellinger * Submit the READ first for COMPARE_AND_WRITE to perform the 49668ff9b9b27525cdaaea81890456f65aed5ce0b70Nicholas Bellinger * comparision using SGLs at cmd->t_bidi_data_sg.. 49768ff9b9b27525cdaaea81890456f65aed5ce0b70Nicholas Bellinger */ 49868ff9b9b27525cdaaea81890456f65aed5ce0b70Nicholas Bellinger rc = down_interruptible(&dev->caw_sem); 49968ff9b9b27525cdaaea81890456f65aed5ce0b70Nicholas Bellinger if ((rc != 0) || signal_pending(current)) { 50068ff9b9b27525cdaaea81890456f65aed5ce0b70Nicholas Bellinger cmd->transport_complete_callback = NULL; 50168ff9b9b27525cdaaea81890456f65aed5ce0b70Nicholas Bellinger return TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; 50268ff9b9b27525cdaaea81890456f65aed5ce0b70Nicholas Bellinger } 50368ff9b9b27525cdaaea81890456f65aed5ce0b70Nicholas Bellinger 50468ff9b9b27525cdaaea81890456f65aed5ce0b70Nicholas Bellinger ret = cmd->execute_rw(cmd, cmd->t_bidi_data_sg, cmd->t_bidi_data_nents, 50568ff9b9b27525cdaaea81890456f65aed5ce0b70Nicholas Bellinger DMA_FROM_DEVICE); 50668ff9b9b27525cdaaea81890456f65aed5ce0b70Nicholas Bellinger if (ret) { 50768ff9b9b27525cdaaea81890456f65aed5ce0b70Nicholas Bellinger cmd->transport_complete_callback = NULL; 50868ff9b9b27525cdaaea81890456f65aed5ce0b70Nicholas Bellinger up(&dev->caw_sem); 50968ff9b9b27525cdaaea81890456f65aed5ce0b70Nicholas Bellinger return ret; 51068ff9b9b27525cdaaea81890456f65aed5ce0b70Nicholas Bellinger } 51168ff9b9b27525cdaaea81890456f65aed5ce0b70Nicholas Bellinger /* 51268ff9b9b27525cdaaea81890456f65aed5ce0b70Nicholas Bellinger * Unlock of dev->caw_sem to occur in compare_and_write_callback() 51368ff9b9b27525cdaaea81890456f65aed5ce0b70Nicholas Bellinger * upon MISCOMPARE, or in compare_and_write_done() upon completion 51468ff9b9b27525cdaaea81890456f65aed5ce0b70Nicholas Bellinger * of WRITE instance user-data. 51568ff9b9b27525cdaaea81890456f65aed5ce0b70Nicholas Bellinger */ 51668ff9b9b27525cdaaea81890456f65aed5ce0b70Nicholas Bellinger return TCM_NO_SENSE; 51768ff9b9b27525cdaaea81890456f65aed5ce0b70Nicholas Bellinger} 51868ff9b9b27525cdaaea81890456f65aed5ce0b70Nicholas Bellinger 519de103c93aff0bed0ae984274e5dc8b95899badabChristoph Hellwigsense_reason_t 520de103c93aff0bed0ae984274e5dc8b95899badabChristoph Hellwigsbc_parse_cdb(struct se_cmd *cmd, struct sbc_ops *ops) 521d6e0175cf3f9737a760482d185bb73566bcc9331Christoph Hellwig{ 522d6e0175cf3f9737a760482d185bb73566bcc9331Christoph Hellwig struct se_device *dev = cmd->se_dev; 523d6e0175cf3f9737a760482d185bb73566bcc9331Christoph Hellwig unsigned char *cdb = cmd->t_task_cdb; 5241fd032ee10d2816c947f5d5b9abda95e728f0a8fChristoph Hellwig unsigned int size; 525d6e0175cf3f9737a760482d185bb73566bcc9331Christoph Hellwig u32 sectors = 0; 526de103c93aff0bed0ae984274e5dc8b95899badabChristoph Hellwig sense_reason_t ret; 527d6e0175cf3f9737a760482d185bb73566bcc9331Christoph Hellwig 528d6e0175cf3f9737a760482d185bb73566bcc9331Christoph Hellwig switch (cdb[0]) { 529d6e0175cf3f9737a760482d185bb73566bcc9331Christoph Hellwig case READ_6: 530d6e0175cf3f9737a760482d185bb73566bcc9331Christoph Hellwig sectors = transport_get_sectors_6(cdb); 531d6e0175cf3f9737a760482d185bb73566bcc9331Christoph Hellwig cmd->t_task_lba = transport_lba_21(cdb); 532d6e0175cf3f9737a760482d185bb73566bcc9331Christoph Hellwig cmd->se_cmd_flags |= SCF_SCSI_DATA_CDB; 533a82a9538dd30471e6428a2d55e91e986c439866bNicholas Bellinger cmd->execute_rw = ops->execute_rw; 534a82a9538dd30471e6428a2d55e91e986c439866bNicholas Bellinger cmd->execute_cmd = sbc_execute_rw; 535d6e0175cf3f9737a760482d185bb73566bcc9331Christoph Hellwig break; 536d6e0175cf3f9737a760482d185bb73566bcc9331Christoph Hellwig case READ_10: 537d6e0175cf3f9737a760482d185bb73566bcc9331Christoph Hellwig sectors = transport_get_sectors_10(cdb); 538d6e0175cf3f9737a760482d185bb73566bcc9331Christoph Hellwig cmd->t_task_lba = transport_lba_32(cdb); 539d6e0175cf3f9737a760482d185bb73566bcc9331Christoph Hellwig cmd->se_cmd_flags |= SCF_SCSI_DATA_CDB; 540a82a9538dd30471e6428a2d55e91e986c439866bNicholas Bellinger cmd->execute_rw = ops->execute_rw; 541a82a9538dd30471e6428a2d55e91e986c439866bNicholas Bellinger cmd->execute_cmd = sbc_execute_rw; 542d6e0175cf3f9737a760482d185bb73566bcc9331Christoph Hellwig break; 543d6e0175cf3f9737a760482d185bb73566bcc9331Christoph Hellwig case READ_12: 544d6e0175cf3f9737a760482d185bb73566bcc9331Christoph Hellwig sectors = transport_get_sectors_12(cdb); 545d6e0175cf3f9737a760482d185bb73566bcc9331Christoph Hellwig cmd->t_task_lba = transport_lba_32(cdb); 546d6e0175cf3f9737a760482d185bb73566bcc9331Christoph Hellwig cmd->se_cmd_flags |= SCF_SCSI_DATA_CDB; 547a82a9538dd30471e6428a2d55e91e986c439866bNicholas Bellinger cmd->execute_rw = ops->execute_rw; 548a82a9538dd30471e6428a2d55e91e986c439866bNicholas Bellinger cmd->execute_cmd = sbc_execute_rw; 549d6e0175cf3f9737a760482d185bb73566bcc9331Christoph Hellwig break; 550d6e0175cf3f9737a760482d185bb73566bcc9331Christoph Hellwig case READ_16: 551d6e0175cf3f9737a760482d185bb73566bcc9331Christoph Hellwig sectors = transport_get_sectors_16(cdb); 552d6e0175cf3f9737a760482d185bb73566bcc9331Christoph Hellwig cmd->t_task_lba = transport_lba_64(cdb); 553d6e0175cf3f9737a760482d185bb73566bcc9331Christoph Hellwig cmd->se_cmd_flags |= SCF_SCSI_DATA_CDB; 554a82a9538dd30471e6428a2d55e91e986c439866bNicholas Bellinger cmd->execute_rw = ops->execute_rw; 555a82a9538dd30471e6428a2d55e91e986c439866bNicholas Bellinger cmd->execute_cmd = sbc_execute_rw; 556d6e0175cf3f9737a760482d185bb73566bcc9331Christoph Hellwig break; 557d6e0175cf3f9737a760482d185bb73566bcc9331Christoph Hellwig case WRITE_6: 558d6e0175cf3f9737a760482d185bb73566bcc9331Christoph Hellwig sectors = transport_get_sectors_6(cdb); 559d6e0175cf3f9737a760482d185bb73566bcc9331Christoph Hellwig cmd->t_task_lba = transport_lba_21(cdb); 560d6e0175cf3f9737a760482d185bb73566bcc9331Christoph Hellwig cmd->se_cmd_flags |= SCF_SCSI_DATA_CDB; 561a82a9538dd30471e6428a2d55e91e986c439866bNicholas Bellinger cmd->execute_rw = ops->execute_rw; 562a82a9538dd30471e6428a2d55e91e986c439866bNicholas Bellinger cmd->execute_cmd = sbc_execute_rw; 563d6e0175cf3f9737a760482d185bb73566bcc9331Christoph Hellwig break; 564d6e0175cf3f9737a760482d185bb73566bcc9331Christoph Hellwig case WRITE_10: 565d6e0175cf3f9737a760482d185bb73566bcc9331Christoph Hellwig case WRITE_VERIFY: 566d6e0175cf3f9737a760482d185bb73566bcc9331Christoph Hellwig sectors = transport_get_sectors_10(cdb); 567d6e0175cf3f9737a760482d185bb73566bcc9331Christoph Hellwig cmd->t_task_lba = transport_lba_32(cdb); 568d6e0175cf3f9737a760482d185bb73566bcc9331Christoph Hellwig if (cdb[1] & 0x8) 569d6e0175cf3f9737a760482d185bb73566bcc9331Christoph Hellwig cmd->se_cmd_flags |= SCF_FUA; 570d6e0175cf3f9737a760482d185bb73566bcc9331Christoph Hellwig cmd->se_cmd_flags |= SCF_SCSI_DATA_CDB; 571a82a9538dd30471e6428a2d55e91e986c439866bNicholas Bellinger cmd->execute_rw = ops->execute_rw; 572a82a9538dd30471e6428a2d55e91e986c439866bNicholas Bellinger cmd->execute_cmd = sbc_execute_rw; 573d6e0175cf3f9737a760482d185bb73566bcc9331Christoph Hellwig break; 574d6e0175cf3f9737a760482d185bb73566bcc9331Christoph Hellwig case WRITE_12: 575d6e0175cf3f9737a760482d185bb73566bcc9331Christoph Hellwig sectors = transport_get_sectors_12(cdb); 576d6e0175cf3f9737a760482d185bb73566bcc9331Christoph Hellwig cmd->t_task_lba = transport_lba_32(cdb); 577d6e0175cf3f9737a760482d185bb73566bcc9331Christoph Hellwig if (cdb[1] & 0x8) 578d6e0175cf3f9737a760482d185bb73566bcc9331Christoph Hellwig cmd->se_cmd_flags |= SCF_FUA; 579d6e0175cf3f9737a760482d185bb73566bcc9331Christoph Hellwig cmd->se_cmd_flags |= SCF_SCSI_DATA_CDB; 580a82a9538dd30471e6428a2d55e91e986c439866bNicholas Bellinger cmd->execute_rw = ops->execute_rw; 581a82a9538dd30471e6428a2d55e91e986c439866bNicholas Bellinger cmd->execute_cmd = sbc_execute_rw; 582d6e0175cf3f9737a760482d185bb73566bcc9331Christoph Hellwig break; 583d6e0175cf3f9737a760482d185bb73566bcc9331Christoph Hellwig case WRITE_16: 584d6e0175cf3f9737a760482d185bb73566bcc9331Christoph Hellwig sectors = transport_get_sectors_16(cdb); 585d6e0175cf3f9737a760482d185bb73566bcc9331Christoph Hellwig cmd->t_task_lba = transport_lba_64(cdb); 586d6e0175cf3f9737a760482d185bb73566bcc9331Christoph Hellwig if (cdb[1] & 0x8) 587d6e0175cf3f9737a760482d185bb73566bcc9331Christoph Hellwig cmd->se_cmd_flags |= SCF_FUA; 588d6e0175cf3f9737a760482d185bb73566bcc9331Christoph Hellwig cmd->se_cmd_flags |= SCF_SCSI_DATA_CDB; 589a82a9538dd30471e6428a2d55e91e986c439866bNicholas Bellinger cmd->execute_rw = ops->execute_rw; 590a82a9538dd30471e6428a2d55e91e986c439866bNicholas Bellinger cmd->execute_cmd = sbc_execute_rw; 591d6e0175cf3f9737a760482d185bb73566bcc9331Christoph Hellwig break; 592d6e0175cf3f9737a760482d185bb73566bcc9331Christoph Hellwig case XDWRITEREAD_10: 593de103c93aff0bed0ae984274e5dc8b95899badabChristoph Hellwig if (cmd->data_direction != DMA_TO_DEVICE || 594d6e0175cf3f9737a760482d185bb73566bcc9331Christoph Hellwig !(cmd->se_cmd_flags & SCF_BIDI)) 595de103c93aff0bed0ae984274e5dc8b95899badabChristoph Hellwig return TCM_INVALID_CDB_FIELD; 596d6e0175cf3f9737a760482d185bb73566bcc9331Christoph Hellwig sectors = transport_get_sectors_10(cdb); 597d6e0175cf3f9737a760482d185bb73566bcc9331Christoph Hellwig 598d6e0175cf3f9737a760482d185bb73566bcc9331Christoph Hellwig cmd->t_task_lba = transport_lba_32(cdb); 599d6e0175cf3f9737a760482d185bb73566bcc9331Christoph Hellwig cmd->se_cmd_flags |= SCF_SCSI_DATA_CDB; 600d6e0175cf3f9737a760482d185bb73566bcc9331Christoph Hellwig 601d6e0175cf3f9737a760482d185bb73566bcc9331Christoph Hellwig /* 602d6e0175cf3f9737a760482d185bb73566bcc9331Christoph Hellwig * Setup BIDI XOR callback to be run after I/O completion. 603d6e0175cf3f9737a760482d185bb73566bcc9331Christoph Hellwig */ 604a82a9538dd30471e6428a2d55e91e986c439866bNicholas Bellinger cmd->execute_rw = ops->execute_rw; 605a82a9538dd30471e6428a2d55e91e986c439866bNicholas Bellinger cmd->execute_cmd = sbc_execute_rw; 606d6e0175cf3f9737a760482d185bb73566bcc9331Christoph Hellwig cmd->transport_complete_callback = &xdreadwrite_callback; 607d6e0175cf3f9737a760482d185bb73566bcc9331Christoph Hellwig if (cdb[1] & 0x8) 608d6e0175cf3f9737a760482d185bb73566bcc9331Christoph Hellwig cmd->se_cmd_flags |= SCF_FUA; 609d6e0175cf3f9737a760482d185bb73566bcc9331Christoph Hellwig break; 610d6e0175cf3f9737a760482d185bb73566bcc9331Christoph Hellwig case VARIABLE_LENGTH_CMD: 611d6e0175cf3f9737a760482d185bb73566bcc9331Christoph Hellwig { 612d6e0175cf3f9737a760482d185bb73566bcc9331Christoph Hellwig u16 service_action = get_unaligned_be16(&cdb[8]); 613d6e0175cf3f9737a760482d185bb73566bcc9331Christoph Hellwig switch (service_action) { 614d6e0175cf3f9737a760482d185bb73566bcc9331Christoph Hellwig case XDWRITEREAD_32: 615d6e0175cf3f9737a760482d185bb73566bcc9331Christoph Hellwig sectors = transport_get_sectors_32(cdb); 616d6e0175cf3f9737a760482d185bb73566bcc9331Christoph Hellwig 617d6e0175cf3f9737a760482d185bb73566bcc9331Christoph Hellwig /* 618d6e0175cf3f9737a760482d185bb73566bcc9331Christoph Hellwig * Use WRITE_32 and READ_32 opcodes for the emulated 619d6e0175cf3f9737a760482d185bb73566bcc9331Christoph Hellwig * XDWRITE_READ_32 logic. 620d6e0175cf3f9737a760482d185bb73566bcc9331Christoph Hellwig */ 621d6e0175cf3f9737a760482d185bb73566bcc9331Christoph Hellwig cmd->t_task_lba = transport_lba_64_ext(cdb); 622d6e0175cf3f9737a760482d185bb73566bcc9331Christoph Hellwig cmd->se_cmd_flags |= SCF_SCSI_DATA_CDB; 623d6e0175cf3f9737a760482d185bb73566bcc9331Christoph Hellwig 624d6e0175cf3f9737a760482d185bb73566bcc9331Christoph Hellwig /* 625d6e0175cf3f9737a760482d185bb73566bcc9331Christoph Hellwig * Setup BIDI XOR callback to be run during after I/O 626d6e0175cf3f9737a760482d185bb73566bcc9331Christoph Hellwig * completion. 627d6e0175cf3f9737a760482d185bb73566bcc9331Christoph Hellwig */ 628a82a9538dd30471e6428a2d55e91e986c439866bNicholas Bellinger cmd->execute_rw = ops->execute_rw; 629a82a9538dd30471e6428a2d55e91e986c439866bNicholas Bellinger cmd->execute_cmd = sbc_execute_rw; 630d6e0175cf3f9737a760482d185bb73566bcc9331Christoph Hellwig cmd->transport_complete_callback = &xdreadwrite_callback; 631d6e0175cf3f9737a760482d185bb73566bcc9331Christoph Hellwig if (cdb[1] & 0x8) 632d6e0175cf3f9737a760482d185bb73566bcc9331Christoph Hellwig cmd->se_cmd_flags |= SCF_FUA; 633d6e0175cf3f9737a760482d185bb73566bcc9331Christoph Hellwig break; 634d6e0175cf3f9737a760482d185bb73566bcc9331Christoph Hellwig case WRITE_SAME_32: 635d6e0175cf3f9737a760482d185bb73566bcc9331Christoph Hellwig sectors = transport_get_sectors_32(cdb); 636d6e0175cf3f9737a760482d185bb73566bcc9331Christoph Hellwig if (!sectors) { 637d6e0175cf3f9737a760482d185bb73566bcc9331Christoph Hellwig pr_err("WSNZ=1, WRITE_SAME w/sectors=0 not" 638d6e0175cf3f9737a760482d185bb73566bcc9331Christoph Hellwig " supported\n"); 639de103c93aff0bed0ae984274e5dc8b95899badabChristoph Hellwig return TCM_INVALID_CDB_FIELD; 640d6e0175cf3f9737a760482d185bb73566bcc9331Christoph Hellwig } 641d6e0175cf3f9737a760482d185bb73566bcc9331Christoph Hellwig 6421fd032ee10d2816c947f5d5b9abda95e728f0a8fChristoph Hellwig size = sbc_get_size(cmd, 1); 643d6e0175cf3f9737a760482d185bb73566bcc9331Christoph Hellwig cmd->t_task_lba = get_unaligned_be64(&cdb[12]); 644d6e0175cf3f9737a760482d185bb73566bcc9331Christoph Hellwig 645cd063bef414c51d79b9c6ea7a8ef8f9d319529bcNicholas Bellinger ret = sbc_setup_write_same(cmd, &cdb[10], ops); 6466b64e1fe2ba80ac3ce12a21f1200bac594fa1a1cDan Carpenter if (ret) 647cd063bef414c51d79b9c6ea7a8ef8f9d319529bcNicholas Bellinger return ret; 648d6e0175cf3f9737a760482d185bb73566bcc9331Christoph Hellwig break; 649d6e0175cf3f9737a760482d185bb73566bcc9331Christoph Hellwig default: 650d6e0175cf3f9737a760482d185bb73566bcc9331Christoph Hellwig pr_err("VARIABLE_LENGTH_CMD service action" 651d6e0175cf3f9737a760482d185bb73566bcc9331Christoph Hellwig " 0x%04x not supported\n", service_action); 652de103c93aff0bed0ae984274e5dc8b95899badabChristoph Hellwig return TCM_UNSUPPORTED_SCSI_OPCODE; 653d6e0175cf3f9737a760482d185bb73566bcc9331Christoph Hellwig } 654d6e0175cf3f9737a760482d185bb73566bcc9331Christoph Hellwig break; 655d6e0175cf3f9737a760482d185bb73566bcc9331Christoph Hellwig } 65668ff9b9b27525cdaaea81890456f65aed5ce0b70Nicholas Bellinger case COMPARE_AND_WRITE: 65768ff9b9b27525cdaaea81890456f65aed5ce0b70Nicholas Bellinger sectors = cdb[13]; 65868ff9b9b27525cdaaea81890456f65aed5ce0b70Nicholas Bellinger /* 65968ff9b9b27525cdaaea81890456f65aed5ce0b70Nicholas Bellinger * Currently enforce COMPARE_AND_WRITE for a single sector 66068ff9b9b27525cdaaea81890456f65aed5ce0b70Nicholas Bellinger */ 66168ff9b9b27525cdaaea81890456f65aed5ce0b70Nicholas Bellinger if (sectors > 1) { 66268ff9b9b27525cdaaea81890456f65aed5ce0b70Nicholas Bellinger pr_err("COMPARE_AND_WRITE contains NoLB: %u greater" 66368ff9b9b27525cdaaea81890456f65aed5ce0b70Nicholas Bellinger " than 1\n", sectors); 66468ff9b9b27525cdaaea81890456f65aed5ce0b70Nicholas Bellinger return TCM_INVALID_CDB_FIELD; 66568ff9b9b27525cdaaea81890456f65aed5ce0b70Nicholas Bellinger } 66668ff9b9b27525cdaaea81890456f65aed5ce0b70Nicholas Bellinger /* 66768ff9b9b27525cdaaea81890456f65aed5ce0b70Nicholas Bellinger * Double size because we have two buffers, note that 66868ff9b9b27525cdaaea81890456f65aed5ce0b70Nicholas Bellinger * zero is not an error.. 66968ff9b9b27525cdaaea81890456f65aed5ce0b70Nicholas Bellinger */ 67068ff9b9b27525cdaaea81890456f65aed5ce0b70Nicholas Bellinger size = 2 * sbc_get_size(cmd, sectors); 67168ff9b9b27525cdaaea81890456f65aed5ce0b70Nicholas Bellinger cmd->t_task_lba = get_unaligned_be64(&cdb[2]); 67268ff9b9b27525cdaaea81890456f65aed5ce0b70Nicholas Bellinger cmd->t_task_nolb = sectors; 67368ff9b9b27525cdaaea81890456f65aed5ce0b70Nicholas Bellinger cmd->se_cmd_flags |= SCF_SCSI_DATA_CDB | SCF_COMPARE_AND_WRITE; 67468ff9b9b27525cdaaea81890456f65aed5ce0b70Nicholas Bellinger cmd->execute_rw = ops->execute_rw; 67568ff9b9b27525cdaaea81890456f65aed5ce0b70Nicholas Bellinger cmd->execute_cmd = sbc_compare_and_write; 67668ff9b9b27525cdaaea81890456f65aed5ce0b70Nicholas Bellinger cmd->transport_complete_callback = compare_and_write_callback; 67768ff9b9b27525cdaaea81890456f65aed5ce0b70Nicholas Bellinger break; 678d6e0175cf3f9737a760482d185bb73566bcc9331Christoph Hellwig case READ_CAPACITY: 6791fd032ee10d2816c947f5d5b9abda95e728f0a8fChristoph Hellwig size = READ_CAP_LEN; 6801fd032ee10d2816c947f5d5b9abda95e728f0a8fChristoph Hellwig cmd->execute_cmd = sbc_emulate_readcapacity; 681d6e0175cf3f9737a760482d185bb73566bcc9331Christoph Hellwig break; 682d6e0175cf3f9737a760482d185bb73566bcc9331Christoph Hellwig case SERVICE_ACTION_IN: 683d6e0175cf3f9737a760482d185bb73566bcc9331Christoph Hellwig switch (cmd->t_task_cdb[1] & 0x1f) { 684d6e0175cf3f9737a760482d185bb73566bcc9331Christoph Hellwig case SAI_READ_CAPACITY_16: 6851fd032ee10d2816c947f5d5b9abda95e728f0a8fChristoph Hellwig cmd->execute_cmd = sbc_emulate_readcapacity_16; 686d6e0175cf3f9737a760482d185bb73566bcc9331Christoph Hellwig break; 687d6e0175cf3f9737a760482d185bb73566bcc9331Christoph Hellwig default: 688d6e0175cf3f9737a760482d185bb73566bcc9331Christoph Hellwig pr_err("Unsupported SA: 0x%02x\n", 689d6e0175cf3f9737a760482d185bb73566bcc9331Christoph Hellwig cmd->t_task_cdb[1] & 0x1f); 690de103c93aff0bed0ae984274e5dc8b95899badabChristoph Hellwig return TCM_INVALID_CDB_FIELD; 691d6e0175cf3f9737a760482d185bb73566bcc9331Christoph Hellwig } 6921fd032ee10d2816c947f5d5b9abda95e728f0a8fChristoph Hellwig size = (cdb[10] << 24) | (cdb[11] << 16) | 693d6e0175cf3f9737a760482d185bb73566bcc9331Christoph Hellwig (cdb[12] << 8) | cdb[13]; 694d6e0175cf3f9737a760482d185bb73566bcc9331Christoph Hellwig break; 695d6e0175cf3f9737a760482d185bb73566bcc9331Christoph Hellwig case SYNCHRONIZE_CACHE: 696d6e0175cf3f9737a760482d185bb73566bcc9331Christoph Hellwig case SYNCHRONIZE_CACHE_16: 697882e3f8e6966109ad837cfe79e97cf3deb3ae19bHannes Reinecke if (!ops->execute_sync_cache) { 698882e3f8e6966109ad837cfe79e97cf3deb3ae19bHannes Reinecke size = 0; 699882e3f8e6966109ad837cfe79e97cf3deb3ae19bHannes Reinecke cmd->execute_cmd = sbc_emulate_noop; 700882e3f8e6966109ad837cfe79e97cf3deb3ae19bHannes Reinecke break; 701882e3f8e6966109ad837cfe79e97cf3deb3ae19bHannes Reinecke } 702ad67f0d9e63ca94661e06a145f05a9302368a826Christoph Hellwig 703d6e0175cf3f9737a760482d185bb73566bcc9331Christoph Hellwig /* 704d6e0175cf3f9737a760482d185bb73566bcc9331Christoph Hellwig * Extract LBA and range to be flushed for emulated SYNCHRONIZE_CACHE 705d6e0175cf3f9737a760482d185bb73566bcc9331Christoph Hellwig */ 706d6e0175cf3f9737a760482d185bb73566bcc9331Christoph Hellwig if (cdb[0] == SYNCHRONIZE_CACHE) { 707d6e0175cf3f9737a760482d185bb73566bcc9331Christoph Hellwig sectors = transport_get_sectors_10(cdb); 708d6e0175cf3f9737a760482d185bb73566bcc9331Christoph Hellwig cmd->t_task_lba = transport_lba_32(cdb); 709d6e0175cf3f9737a760482d185bb73566bcc9331Christoph Hellwig } else { 710d6e0175cf3f9737a760482d185bb73566bcc9331Christoph Hellwig sectors = transport_get_sectors_16(cdb); 711d6e0175cf3f9737a760482d185bb73566bcc9331Christoph Hellwig cmd->t_task_lba = transport_lba_64(cdb); 712d6e0175cf3f9737a760482d185bb73566bcc9331Christoph Hellwig } 713d6e0175cf3f9737a760482d185bb73566bcc9331Christoph Hellwig 7141fd032ee10d2816c947f5d5b9abda95e728f0a8fChristoph Hellwig size = sbc_get_size(cmd, sectors); 715d6e0175cf3f9737a760482d185bb73566bcc9331Christoph Hellwig 716d6e0175cf3f9737a760482d185bb73566bcc9331Christoph Hellwig /* 717d6e0175cf3f9737a760482d185bb73566bcc9331Christoph Hellwig * Check to ensure that LBA + Range does not exceed past end of 718d6e0175cf3f9737a760482d185bb73566bcc9331Christoph Hellwig * device for IBLOCK and FILEIO ->do_sync_cache() backend calls 719d6e0175cf3f9737a760482d185bb73566bcc9331Christoph Hellwig */ 720d6e0175cf3f9737a760482d185bb73566bcc9331Christoph Hellwig if (cmd->t_task_lba || sectors) { 721d6e0175cf3f9737a760482d185bb73566bcc9331Christoph Hellwig if (sbc_check_valid_sectors(cmd) < 0) 72233633676df0d16d0685f2fbc571143801bc16e3bRoland Dreier return TCM_ADDRESS_OUT_OF_RANGE; 723d6e0175cf3f9737a760482d185bb73566bcc9331Christoph Hellwig } 724ad67f0d9e63ca94661e06a145f05a9302368a826Christoph Hellwig cmd->execute_cmd = ops->execute_sync_cache; 725d6e0175cf3f9737a760482d185bb73566bcc9331Christoph Hellwig break; 726d6e0175cf3f9737a760482d185bb73566bcc9331Christoph Hellwig case UNMAP: 72714150a6bbe9e15ce8e7a4f79047c2b4284a51b3dChristoph Hellwig if (!ops->execute_unmap) 728de103c93aff0bed0ae984274e5dc8b95899badabChristoph Hellwig return TCM_UNSUPPORTED_SCSI_OPCODE; 72914150a6bbe9e15ce8e7a4f79047c2b4284a51b3dChristoph Hellwig 7301fd032ee10d2816c947f5d5b9abda95e728f0a8fChristoph Hellwig size = get_unaligned_be16(&cdb[7]); 73114150a6bbe9e15ce8e7a4f79047c2b4284a51b3dChristoph Hellwig cmd->execute_cmd = ops->execute_unmap; 732d6e0175cf3f9737a760482d185bb73566bcc9331Christoph Hellwig break; 733d6e0175cf3f9737a760482d185bb73566bcc9331Christoph Hellwig case WRITE_SAME_16: 734d6e0175cf3f9737a760482d185bb73566bcc9331Christoph Hellwig sectors = transport_get_sectors_16(cdb); 735d6e0175cf3f9737a760482d185bb73566bcc9331Christoph Hellwig if (!sectors) { 736d6e0175cf3f9737a760482d185bb73566bcc9331Christoph Hellwig pr_err("WSNZ=1, WRITE_SAME w/sectors=0 not supported\n"); 737de103c93aff0bed0ae984274e5dc8b95899badabChristoph Hellwig return TCM_INVALID_CDB_FIELD; 738d6e0175cf3f9737a760482d185bb73566bcc9331Christoph Hellwig } 739d6e0175cf3f9737a760482d185bb73566bcc9331Christoph Hellwig 7401fd032ee10d2816c947f5d5b9abda95e728f0a8fChristoph Hellwig size = sbc_get_size(cmd, 1); 741d6e0175cf3f9737a760482d185bb73566bcc9331Christoph Hellwig cmd->t_task_lba = get_unaligned_be64(&cdb[2]); 742d6e0175cf3f9737a760482d185bb73566bcc9331Christoph Hellwig 743cd063bef414c51d79b9c6ea7a8ef8f9d319529bcNicholas Bellinger ret = sbc_setup_write_same(cmd, &cdb[1], ops); 7446b64e1fe2ba80ac3ce12a21f1200bac594fa1a1cDan Carpenter if (ret) 745cd063bef414c51d79b9c6ea7a8ef8f9d319529bcNicholas Bellinger return ret; 746d6e0175cf3f9737a760482d185bb73566bcc9331Christoph Hellwig break; 747d6e0175cf3f9737a760482d185bb73566bcc9331Christoph Hellwig case WRITE_SAME: 748d6e0175cf3f9737a760482d185bb73566bcc9331Christoph Hellwig sectors = transport_get_sectors_10(cdb); 749d6e0175cf3f9737a760482d185bb73566bcc9331Christoph Hellwig if (!sectors) { 750d6e0175cf3f9737a760482d185bb73566bcc9331Christoph Hellwig pr_err("WSNZ=1, WRITE_SAME w/sectors=0 not supported\n"); 751de103c93aff0bed0ae984274e5dc8b95899badabChristoph Hellwig return TCM_INVALID_CDB_FIELD; 752d6e0175cf3f9737a760482d185bb73566bcc9331Christoph Hellwig } 753d6e0175cf3f9737a760482d185bb73566bcc9331Christoph Hellwig 7541fd032ee10d2816c947f5d5b9abda95e728f0a8fChristoph Hellwig size = sbc_get_size(cmd, 1); 755d6e0175cf3f9737a760482d185bb73566bcc9331Christoph Hellwig cmd->t_task_lba = get_unaligned_be32(&cdb[2]); 756d6e0175cf3f9737a760482d185bb73566bcc9331Christoph Hellwig 757d6e0175cf3f9737a760482d185bb73566bcc9331Christoph Hellwig /* 758d6e0175cf3f9737a760482d185bb73566bcc9331Christoph Hellwig * Follow sbcr26 with WRITE_SAME (10) and check for the existence 759d6e0175cf3f9737a760482d185bb73566bcc9331Christoph Hellwig * of byte 1 bit 3 UNMAP instead of original reserved field 760d6e0175cf3f9737a760482d185bb73566bcc9331Christoph Hellwig */ 761cd063bef414c51d79b9c6ea7a8ef8f9d319529bcNicholas Bellinger ret = sbc_setup_write_same(cmd, &cdb[1], ops); 7626b64e1fe2ba80ac3ce12a21f1200bac594fa1a1cDan Carpenter if (ret) 763cd063bef414c51d79b9c6ea7a8ef8f9d319529bcNicholas Bellinger return ret; 764d6e0175cf3f9737a760482d185bb73566bcc9331Christoph Hellwig break; 765d6e0175cf3f9737a760482d185bb73566bcc9331Christoph Hellwig case VERIFY: 7661fd032ee10d2816c947f5d5b9abda95e728f0a8fChristoph Hellwig size = 0; 7671920ed61fbbbb38919edfb2427b0b1fd4e4ad8d9Nicholas Bellinger cmd->execute_cmd = sbc_emulate_noop; 768d6e0175cf3f9737a760482d185bb73566bcc9331Christoph Hellwig break; 7691a1ff38c4cebf23be8bf0009a76b082a13bd25cbBernhard Kohl case REZERO_UNIT: 7701a1ff38c4cebf23be8bf0009a76b082a13bd25cbBernhard Kohl case SEEK_6: 7711a1ff38c4cebf23be8bf0009a76b082a13bd25cbBernhard Kohl case SEEK_10: 7721a1ff38c4cebf23be8bf0009a76b082a13bd25cbBernhard Kohl /* 7731a1ff38c4cebf23be8bf0009a76b082a13bd25cbBernhard Kohl * There are still clients out there which use these old SCSI-2 7741a1ff38c4cebf23be8bf0009a76b082a13bd25cbBernhard Kohl * commands. This mainly happens when running VMs with legacy 7751a1ff38c4cebf23be8bf0009a76b082a13bd25cbBernhard Kohl * guest systems, connected via SCSI command pass-through to 7761a1ff38c4cebf23be8bf0009a76b082a13bd25cbBernhard Kohl * iSCSI targets. Make them happy and return status GOOD. 7771a1ff38c4cebf23be8bf0009a76b082a13bd25cbBernhard Kohl */ 7781a1ff38c4cebf23be8bf0009a76b082a13bd25cbBernhard Kohl size = 0; 7791a1ff38c4cebf23be8bf0009a76b082a13bd25cbBernhard Kohl cmd->execute_cmd = sbc_emulate_noop; 7801a1ff38c4cebf23be8bf0009a76b082a13bd25cbBernhard Kohl break; 781d6e0175cf3f9737a760482d185bb73566bcc9331Christoph Hellwig default: 7821fd032ee10d2816c947f5d5b9abda95e728f0a8fChristoph Hellwig ret = spc_parse_cdb(cmd, &size); 783d6e0175cf3f9737a760482d185bb73566bcc9331Christoph Hellwig if (ret) 784d6e0175cf3f9737a760482d185bb73566bcc9331Christoph Hellwig return ret; 785d6e0175cf3f9737a760482d185bb73566bcc9331Christoph Hellwig } 786d6e0175cf3f9737a760482d185bb73566bcc9331Christoph Hellwig 787d6e0175cf3f9737a760482d185bb73566bcc9331Christoph Hellwig /* reject any command that we don't have a handler for */ 788d6e0175cf3f9737a760482d185bb73566bcc9331Christoph Hellwig if (!(cmd->se_cmd_flags & SCF_SCSI_DATA_CDB) && !cmd->execute_cmd) 789de103c93aff0bed0ae984274e5dc8b95899badabChristoph Hellwig return TCM_UNSUPPORTED_SCSI_OPCODE; 790d6e0175cf3f9737a760482d185bb73566bcc9331Christoph Hellwig 791d6e0175cf3f9737a760482d185bb73566bcc9331Christoph Hellwig if (cmd->se_cmd_flags & SCF_SCSI_DATA_CDB) { 7921fd032ee10d2816c947f5d5b9abda95e728f0a8fChristoph Hellwig unsigned long long end_lba; 7931fd032ee10d2816c947f5d5b9abda95e728f0a8fChristoph Hellwig 7940fd97ccf45be26fb01b3a412f1f6c6b5044b2f16Christoph Hellwig if (sectors > dev->dev_attrib.fabric_max_sectors) { 795d6e0175cf3f9737a760482d185bb73566bcc9331Christoph Hellwig printk_ratelimited(KERN_ERR "SCSI OP %02xh with too" 796d6e0175cf3f9737a760482d185bb73566bcc9331Christoph Hellwig " big sectors %u exceeds fabric_max_sectors:" 797d6e0175cf3f9737a760482d185bb73566bcc9331Christoph Hellwig " %u\n", cdb[0], sectors, 7980fd97ccf45be26fb01b3a412f1f6c6b5044b2f16Christoph Hellwig dev->dev_attrib.fabric_max_sectors); 799de103c93aff0bed0ae984274e5dc8b95899badabChristoph Hellwig return TCM_INVALID_CDB_FIELD; 800d6e0175cf3f9737a760482d185bb73566bcc9331Christoph Hellwig } 8010fd97ccf45be26fb01b3a412f1f6c6b5044b2f16Christoph Hellwig if (sectors > dev->dev_attrib.hw_max_sectors) { 802d6e0175cf3f9737a760482d185bb73566bcc9331Christoph Hellwig printk_ratelimited(KERN_ERR "SCSI OP %02xh with too" 803d6e0175cf3f9737a760482d185bb73566bcc9331Christoph Hellwig " big sectors %u exceeds backend hw_max_sectors:" 804d6e0175cf3f9737a760482d185bb73566bcc9331Christoph Hellwig " %u\n", cdb[0], sectors, 8050fd97ccf45be26fb01b3a412f1f6c6b5044b2f16Christoph Hellwig dev->dev_attrib.hw_max_sectors); 806de103c93aff0bed0ae984274e5dc8b95899badabChristoph Hellwig return TCM_INVALID_CDB_FIELD; 807d6e0175cf3f9737a760482d185bb73566bcc9331Christoph Hellwig } 808d6e0175cf3f9737a760482d185bb73566bcc9331Christoph Hellwig 8091fd032ee10d2816c947f5d5b9abda95e728f0a8fChristoph Hellwig end_lba = dev->transport->get_blocks(dev) + 1; 8101fd032ee10d2816c947f5d5b9abda95e728f0a8fChristoph Hellwig if (cmd->t_task_lba + sectors > end_lba) { 8111fd032ee10d2816c947f5d5b9abda95e728f0a8fChristoph Hellwig pr_err("cmd exceeds last lba %llu " 8121fd032ee10d2816c947f5d5b9abda95e728f0a8fChristoph Hellwig "(lba %llu, sectors %u)\n", 8131fd032ee10d2816c947f5d5b9abda95e728f0a8fChristoph Hellwig end_lba, cmd->t_task_lba, sectors); 81409ceadc70383a4105c0372f9e83da2c0cb0a8017Roland Dreier return TCM_ADDRESS_OUT_OF_RANGE; 8151fd032ee10d2816c947f5d5b9abda95e728f0a8fChristoph Hellwig } 8161fd032ee10d2816c947f5d5b9abda95e728f0a8fChristoph Hellwig 81768ff9b9b27525cdaaea81890456f65aed5ce0b70Nicholas Bellinger if (!(cmd->se_cmd_flags & SCF_COMPARE_AND_WRITE)) 81868ff9b9b27525cdaaea81890456f65aed5ce0b70Nicholas Bellinger size = sbc_get_size(cmd, sectors); 819d6e0175cf3f9737a760482d185bb73566bcc9331Christoph Hellwig } 820d6e0175cf3f9737a760482d185bb73566bcc9331Christoph Hellwig 821de103c93aff0bed0ae984274e5dc8b95899badabChristoph Hellwig return target_cmd_size_check(cmd, size); 822d6e0175cf3f9737a760482d185bb73566bcc9331Christoph Hellwig} 823d6e0175cf3f9737a760482d185bb73566bcc9331Christoph HellwigEXPORT_SYMBOL(sbc_parse_cdb); 8246f23ac8a39418d6c6711f4fd73cc4519067d7f08Christoph Hellwig 8256f23ac8a39418d6c6711f4fd73cc4519067d7f08Christoph Hellwigu32 sbc_get_device_type(struct se_device *dev) 8266f23ac8a39418d6c6711f4fd73cc4519067d7f08Christoph Hellwig{ 8276f23ac8a39418d6c6711f4fd73cc4519067d7f08Christoph Hellwig return TYPE_DISK; 8286f23ac8a39418d6c6711f4fd73cc4519067d7f08Christoph Hellwig} 8296f23ac8a39418d6c6711f4fd73cc4519067d7f08Christoph HellwigEXPORT_SYMBOL(sbc_get_device_type); 83086d7182985d25900929adce14fffd729cc8c6fb8Asias He 83186d7182985d25900929adce14fffd729cc8c6fb8Asias Hesense_reason_t 83286d7182985d25900929adce14fffd729cc8c6fb8Asias Hesbc_execute_unmap(struct se_cmd *cmd, 83386d7182985d25900929adce14fffd729cc8c6fb8Asias He sense_reason_t (*do_unmap_fn)(struct se_cmd *, void *, 83486d7182985d25900929adce14fffd729cc8c6fb8Asias He sector_t, sector_t), 83586d7182985d25900929adce14fffd729cc8c6fb8Asias He void *priv) 83686d7182985d25900929adce14fffd729cc8c6fb8Asias He{ 83786d7182985d25900929adce14fffd729cc8c6fb8Asias He struct se_device *dev = cmd->se_dev; 83886d7182985d25900929adce14fffd729cc8c6fb8Asias He unsigned char *buf, *ptr = NULL; 83986d7182985d25900929adce14fffd729cc8c6fb8Asias He sector_t lba; 84086d7182985d25900929adce14fffd729cc8c6fb8Asias He int size; 84186d7182985d25900929adce14fffd729cc8c6fb8Asias He u32 range; 84286d7182985d25900929adce14fffd729cc8c6fb8Asias He sense_reason_t ret = 0; 84386d7182985d25900929adce14fffd729cc8c6fb8Asias He int dl, bd_dl; 84486d7182985d25900929adce14fffd729cc8c6fb8Asias He 84586d7182985d25900929adce14fffd729cc8c6fb8Asias He /* We never set ANC_SUP */ 84686d7182985d25900929adce14fffd729cc8c6fb8Asias He if (cmd->t_task_cdb[1]) 84786d7182985d25900929adce14fffd729cc8c6fb8Asias He return TCM_INVALID_CDB_FIELD; 84886d7182985d25900929adce14fffd729cc8c6fb8Asias He 84986d7182985d25900929adce14fffd729cc8c6fb8Asias He if (cmd->data_length == 0) { 85086d7182985d25900929adce14fffd729cc8c6fb8Asias He target_complete_cmd(cmd, SAM_STAT_GOOD); 85186d7182985d25900929adce14fffd729cc8c6fb8Asias He return 0; 85286d7182985d25900929adce14fffd729cc8c6fb8Asias He } 85386d7182985d25900929adce14fffd729cc8c6fb8Asias He 85486d7182985d25900929adce14fffd729cc8c6fb8Asias He if (cmd->data_length < 8) { 85586d7182985d25900929adce14fffd729cc8c6fb8Asias He pr_warn("UNMAP parameter list length %u too small\n", 85686d7182985d25900929adce14fffd729cc8c6fb8Asias He cmd->data_length); 85786d7182985d25900929adce14fffd729cc8c6fb8Asias He return TCM_PARAMETER_LIST_LENGTH_ERROR; 85886d7182985d25900929adce14fffd729cc8c6fb8Asias He } 85986d7182985d25900929adce14fffd729cc8c6fb8Asias He 86086d7182985d25900929adce14fffd729cc8c6fb8Asias He buf = transport_kmap_data_sg(cmd); 86186d7182985d25900929adce14fffd729cc8c6fb8Asias He if (!buf) 86286d7182985d25900929adce14fffd729cc8c6fb8Asias He return TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; 86386d7182985d25900929adce14fffd729cc8c6fb8Asias He 86486d7182985d25900929adce14fffd729cc8c6fb8Asias He dl = get_unaligned_be16(&buf[0]); 86586d7182985d25900929adce14fffd729cc8c6fb8Asias He bd_dl = get_unaligned_be16(&buf[2]); 86686d7182985d25900929adce14fffd729cc8c6fb8Asias He 86786d7182985d25900929adce14fffd729cc8c6fb8Asias He size = cmd->data_length - 8; 86886d7182985d25900929adce14fffd729cc8c6fb8Asias He if (bd_dl > size) 86986d7182985d25900929adce14fffd729cc8c6fb8Asias He pr_warn("UNMAP parameter list length %u too small, ignoring bd_dl %u\n", 87086d7182985d25900929adce14fffd729cc8c6fb8Asias He cmd->data_length, bd_dl); 87186d7182985d25900929adce14fffd729cc8c6fb8Asias He else 87286d7182985d25900929adce14fffd729cc8c6fb8Asias He size = bd_dl; 87386d7182985d25900929adce14fffd729cc8c6fb8Asias He 87486d7182985d25900929adce14fffd729cc8c6fb8Asias He if (size / 16 > dev->dev_attrib.max_unmap_block_desc_count) { 87586d7182985d25900929adce14fffd729cc8c6fb8Asias He ret = TCM_INVALID_PARAMETER_LIST; 87686d7182985d25900929adce14fffd729cc8c6fb8Asias He goto err; 87786d7182985d25900929adce14fffd729cc8c6fb8Asias He } 87886d7182985d25900929adce14fffd729cc8c6fb8Asias He 87986d7182985d25900929adce14fffd729cc8c6fb8Asias He /* First UNMAP block descriptor starts at 8 byte offset */ 88086d7182985d25900929adce14fffd729cc8c6fb8Asias He ptr = &buf[8]; 88186d7182985d25900929adce14fffd729cc8c6fb8Asias He pr_debug("UNMAP: Sub: %s Using dl: %u bd_dl: %u size: %u" 88286d7182985d25900929adce14fffd729cc8c6fb8Asias He " ptr: %p\n", dev->transport->name, dl, bd_dl, size, ptr); 88386d7182985d25900929adce14fffd729cc8c6fb8Asias He 88486d7182985d25900929adce14fffd729cc8c6fb8Asias He while (size >= 16) { 88586d7182985d25900929adce14fffd729cc8c6fb8Asias He lba = get_unaligned_be64(&ptr[0]); 88686d7182985d25900929adce14fffd729cc8c6fb8Asias He range = get_unaligned_be32(&ptr[8]); 88786d7182985d25900929adce14fffd729cc8c6fb8Asias He pr_debug("UNMAP: Using lba: %llu and range: %u\n", 88886d7182985d25900929adce14fffd729cc8c6fb8Asias He (unsigned long long)lba, range); 88986d7182985d25900929adce14fffd729cc8c6fb8Asias He 89086d7182985d25900929adce14fffd729cc8c6fb8Asias He if (range > dev->dev_attrib.max_unmap_lba_count) { 89186d7182985d25900929adce14fffd729cc8c6fb8Asias He ret = TCM_INVALID_PARAMETER_LIST; 89286d7182985d25900929adce14fffd729cc8c6fb8Asias He goto err; 89386d7182985d25900929adce14fffd729cc8c6fb8Asias He } 89486d7182985d25900929adce14fffd729cc8c6fb8Asias He 89586d7182985d25900929adce14fffd729cc8c6fb8Asias He if (lba + range > dev->transport->get_blocks(dev) + 1) { 89686d7182985d25900929adce14fffd729cc8c6fb8Asias He ret = TCM_ADDRESS_OUT_OF_RANGE; 89786d7182985d25900929adce14fffd729cc8c6fb8Asias He goto err; 89886d7182985d25900929adce14fffd729cc8c6fb8Asias He } 89986d7182985d25900929adce14fffd729cc8c6fb8Asias He 90086d7182985d25900929adce14fffd729cc8c6fb8Asias He ret = do_unmap_fn(cmd, priv, lba, range); 90186d7182985d25900929adce14fffd729cc8c6fb8Asias He if (ret) 90286d7182985d25900929adce14fffd729cc8c6fb8Asias He goto err; 90386d7182985d25900929adce14fffd729cc8c6fb8Asias He 90486d7182985d25900929adce14fffd729cc8c6fb8Asias He ptr += 16; 90586d7182985d25900929adce14fffd729cc8c6fb8Asias He size -= 16; 90686d7182985d25900929adce14fffd729cc8c6fb8Asias He } 90786d7182985d25900929adce14fffd729cc8c6fb8Asias He 90886d7182985d25900929adce14fffd729cc8c6fb8Asias Heerr: 90986d7182985d25900929adce14fffd729cc8c6fb8Asias He transport_kunmap_data_sg(cmd); 91086d7182985d25900929adce14fffd729cc8c6fb8Asias He if (!ret) 91186d7182985d25900929adce14fffd729cc8c6fb8Asias He target_complete_cmd(cmd, GOOD); 91286d7182985d25900929adce14fffd729cc8c6fb8Asias He return ret; 91386d7182985d25900929adce14fffd729cc8c6fb8Asias He} 91486d7182985d25900929adce14fffd729cc8c6fb8Asias HeEXPORT_SYMBOL(sbc_execute_unmap); 915