target_core_sbc.c revision 0c2ad7d1132d8b089b1d37875917858e03610019
1d6e0175cf3f9737a760482d185bb73566bcc9331Christoph Hellwig/* 2d6e0175cf3f9737a760482d185bb73566bcc9331Christoph Hellwig * SCSI Block Commands (SBC) parsing and emulation. 3d6e0175cf3f9737a760482d185bb73566bcc9331Christoph Hellwig * 4d6e0175cf3f9737a760482d185bb73566bcc9331Christoph Hellwig * Copyright (c) 2002, 2003, 2004, 2005 PyX Technologies, Inc. 5d6e0175cf3f9737a760482d185bb73566bcc9331Christoph Hellwig * Copyright (c) 2005, 2006, 2007 SBE, Inc. 6d6e0175cf3f9737a760482d185bb73566bcc9331Christoph Hellwig * Copyright (c) 2007-2010 Rising Tide Systems 7d6e0175cf3f9737a760482d185bb73566bcc9331Christoph Hellwig * Copyright (c) 2008-2010 Linux-iSCSI.org 8d6e0175cf3f9737a760482d185bb73566bcc9331Christoph Hellwig * 9d6e0175cf3f9737a760482d185bb73566bcc9331Christoph Hellwig * Nicholas A. Bellinger <nab@kernel.org> 10d6e0175cf3f9737a760482d185bb73566bcc9331Christoph Hellwig * 11d6e0175cf3f9737a760482d185bb73566bcc9331Christoph Hellwig * This program is free software; you can redistribute it and/or modify 12d6e0175cf3f9737a760482d185bb73566bcc9331Christoph Hellwig * it under the terms of the GNU General Public License as published by 13d6e0175cf3f9737a760482d185bb73566bcc9331Christoph Hellwig * the Free Software Foundation; either version 2 of the License, or 14d6e0175cf3f9737a760482d185bb73566bcc9331Christoph Hellwig * (at your option) any later version. 15d6e0175cf3f9737a760482d185bb73566bcc9331Christoph Hellwig * 16d6e0175cf3f9737a760482d185bb73566bcc9331Christoph Hellwig * This program is distributed in the hope that it will be useful, 17d6e0175cf3f9737a760482d185bb73566bcc9331Christoph Hellwig * but WITHOUT ANY WARRANTY; without even the implied warranty of 18d6e0175cf3f9737a760482d185bb73566bcc9331Christoph Hellwig * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 19d6e0175cf3f9737a760482d185bb73566bcc9331Christoph Hellwig * GNU General Public License for more details. 20d6e0175cf3f9737a760482d185bb73566bcc9331Christoph Hellwig * 21d6e0175cf3f9737a760482d185bb73566bcc9331Christoph Hellwig * You should have received a copy of the GNU General Public License 22d6e0175cf3f9737a760482d185bb73566bcc9331Christoph Hellwig * along with this program; if not, write to the Free Software 23d6e0175cf3f9737a760482d185bb73566bcc9331Christoph Hellwig * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. 24d6e0175cf3f9737a760482d185bb73566bcc9331Christoph Hellwig */ 25d6e0175cf3f9737a760482d185bb73566bcc9331Christoph Hellwig 26d6e0175cf3f9737a760482d185bb73566bcc9331Christoph Hellwig#include <linux/kernel.h> 27d6e0175cf3f9737a760482d185bb73566bcc9331Christoph Hellwig#include <linux/module.h> 28d6e0175cf3f9737a760482d185bb73566bcc9331Christoph Hellwig#include <linux/ratelimit.h> 29d6e0175cf3f9737a760482d185bb73566bcc9331Christoph Hellwig#include <asm/unaligned.h> 30d6e0175cf3f9737a760482d185bb73566bcc9331Christoph Hellwig#include <scsi/scsi.h> 31d6e0175cf3f9737a760482d185bb73566bcc9331Christoph Hellwig 32d6e0175cf3f9737a760482d185bb73566bcc9331Christoph Hellwig#include <target/target_core_base.h> 33d6e0175cf3f9737a760482d185bb73566bcc9331Christoph Hellwig#include <target/target_core_backend.h> 34d6e0175cf3f9737a760482d185bb73566bcc9331Christoph Hellwig#include <target/target_core_fabric.h> 35d6e0175cf3f9737a760482d185bb73566bcc9331Christoph Hellwig 36d6e0175cf3f9737a760482d185bb73566bcc9331Christoph Hellwig#include "target_core_internal.h" 37d6e0175cf3f9737a760482d185bb73566bcc9331Christoph Hellwig#include "target_core_ua.h" 38d6e0175cf3f9737a760482d185bb73566bcc9331Christoph Hellwig 39d6e0175cf3f9737a760482d185bb73566bcc9331Christoph Hellwig 401fd032ee10d2816c947f5d5b9abda95e728f0a8fChristoph Hellwigstatic int sbc_emulate_readcapacity(struct se_cmd *cmd) 411fd032ee10d2816c947f5d5b9abda95e728f0a8fChristoph Hellwig{ 421fd032ee10d2816c947f5d5b9abda95e728f0a8fChristoph Hellwig struct se_device *dev = cmd->se_dev; 431fd032ee10d2816c947f5d5b9abda95e728f0a8fChristoph Hellwig unsigned char *buf; 441fd032ee10d2816c947f5d5b9abda95e728f0a8fChristoph Hellwig unsigned long long blocks_long = dev->transport->get_blocks(dev); 451fd032ee10d2816c947f5d5b9abda95e728f0a8fChristoph Hellwig u32 blocks; 461fd032ee10d2816c947f5d5b9abda95e728f0a8fChristoph Hellwig 471fd032ee10d2816c947f5d5b9abda95e728f0a8fChristoph Hellwig if (blocks_long >= 0x00000000ffffffff) 481fd032ee10d2816c947f5d5b9abda95e728f0a8fChristoph Hellwig blocks = 0xffffffff; 491fd032ee10d2816c947f5d5b9abda95e728f0a8fChristoph Hellwig else 501fd032ee10d2816c947f5d5b9abda95e728f0a8fChristoph Hellwig blocks = (u32)blocks_long; 511fd032ee10d2816c947f5d5b9abda95e728f0a8fChristoph Hellwig 521fd032ee10d2816c947f5d5b9abda95e728f0a8fChristoph Hellwig buf = transport_kmap_data_sg(cmd); 531fd032ee10d2816c947f5d5b9abda95e728f0a8fChristoph Hellwig 541fd032ee10d2816c947f5d5b9abda95e728f0a8fChristoph Hellwig buf[0] = (blocks >> 24) & 0xff; 551fd032ee10d2816c947f5d5b9abda95e728f0a8fChristoph Hellwig buf[1] = (blocks >> 16) & 0xff; 561fd032ee10d2816c947f5d5b9abda95e728f0a8fChristoph Hellwig buf[2] = (blocks >> 8) & 0xff; 571fd032ee10d2816c947f5d5b9abda95e728f0a8fChristoph Hellwig buf[3] = blocks & 0xff; 581fd032ee10d2816c947f5d5b9abda95e728f0a8fChristoph Hellwig buf[4] = (dev->se_sub_dev->se_dev_attrib.block_size >> 24) & 0xff; 591fd032ee10d2816c947f5d5b9abda95e728f0a8fChristoph Hellwig buf[5] = (dev->se_sub_dev->se_dev_attrib.block_size >> 16) & 0xff; 601fd032ee10d2816c947f5d5b9abda95e728f0a8fChristoph Hellwig buf[6] = (dev->se_sub_dev->se_dev_attrib.block_size >> 8) & 0xff; 611fd032ee10d2816c947f5d5b9abda95e728f0a8fChristoph Hellwig buf[7] = dev->se_sub_dev->se_dev_attrib.block_size & 0xff; 621fd032ee10d2816c947f5d5b9abda95e728f0a8fChristoph Hellwig 631fd032ee10d2816c947f5d5b9abda95e728f0a8fChristoph Hellwig transport_kunmap_data_sg(cmd); 641fd032ee10d2816c947f5d5b9abda95e728f0a8fChristoph Hellwig 651fd032ee10d2816c947f5d5b9abda95e728f0a8fChristoph Hellwig target_complete_cmd(cmd, GOOD); 661fd032ee10d2816c947f5d5b9abda95e728f0a8fChristoph Hellwig return 0; 671fd032ee10d2816c947f5d5b9abda95e728f0a8fChristoph Hellwig} 681fd032ee10d2816c947f5d5b9abda95e728f0a8fChristoph Hellwig 691fd032ee10d2816c947f5d5b9abda95e728f0a8fChristoph Hellwigstatic int sbc_emulate_readcapacity_16(struct se_cmd *cmd) 701fd032ee10d2816c947f5d5b9abda95e728f0a8fChristoph Hellwig{ 711fd032ee10d2816c947f5d5b9abda95e728f0a8fChristoph Hellwig struct se_device *dev = cmd->se_dev; 721fd032ee10d2816c947f5d5b9abda95e728f0a8fChristoph Hellwig unsigned char *buf; 731fd032ee10d2816c947f5d5b9abda95e728f0a8fChristoph Hellwig unsigned long long blocks = dev->transport->get_blocks(dev); 741fd032ee10d2816c947f5d5b9abda95e728f0a8fChristoph Hellwig 751fd032ee10d2816c947f5d5b9abda95e728f0a8fChristoph Hellwig buf = transport_kmap_data_sg(cmd); 761fd032ee10d2816c947f5d5b9abda95e728f0a8fChristoph Hellwig 771fd032ee10d2816c947f5d5b9abda95e728f0a8fChristoph Hellwig buf[0] = (blocks >> 56) & 0xff; 781fd032ee10d2816c947f5d5b9abda95e728f0a8fChristoph Hellwig buf[1] = (blocks >> 48) & 0xff; 791fd032ee10d2816c947f5d5b9abda95e728f0a8fChristoph Hellwig buf[2] = (blocks >> 40) & 0xff; 801fd032ee10d2816c947f5d5b9abda95e728f0a8fChristoph Hellwig buf[3] = (blocks >> 32) & 0xff; 811fd032ee10d2816c947f5d5b9abda95e728f0a8fChristoph Hellwig buf[4] = (blocks >> 24) & 0xff; 821fd032ee10d2816c947f5d5b9abda95e728f0a8fChristoph Hellwig buf[5] = (blocks >> 16) & 0xff; 831fd032ee10d2816c947f5d5b9abda95e728f0a8fChristoph Hellwig buf[6] = (blocks >> 8) & 0xff; 841fd032ee10d2816c947f5d5b9abda95e728f0a8fChristoph Hellwig buf[7] = blocks & 0xff; 851fd032ee10d2816c947f5d5b9abda95e728f0a8fChristoph Hellwig buf[8] = (dev->se_sub_dev->se_dev_attrib.block_size >> 24) & 0xff; 861fd032ee10d2816c947f5d5b9abda95e728f0a8fChristoph Hellwig buf[9] = (dev->se_sub_dev->se_dev_attrib.block_size >> 16) & 0xff; 871fd032ee10d2816c947f5d5b9abda95e728f0a8fChristoph Hellwig buf[10] = (dev->se_sub_dev->se_dev_attrib.block_size >> 8) & 0xff; 881fd032ee10d2816c947f5d5b9abda95e728f0a8fChristoph Hellwig buf[11] = dev->se_sub_dev->se_dev_attrib.block_size & 0xff; 891fd032ee10d2816c947f5d5b9abda95e728f0a8fChristoph Hellwig /* 901fd032ee10d2816c947f5d5b9abda95e728f0a8fChristoph Hellwig * Set Thin Provisioning Enable bit following sbc3r22 in section 911fd032ee10d2816c947f5d5b9abda95e728f0a8fChristoph Hellwig * READ CAPACITY (16) byte 14 if emulate_tpu or emulate_tpws is enabled. 921fd032ee10d2816c947f5d5b9abda95e728f0a8fChristoph Hellwig */ 931fd032ee10d2816c947f5d5b9abda95e728f0a8fChristoph Hellwig if (dev->se_sub_dev->se_dev_attrib.emulate_tpu || dev->se_sub_dev->se_dev_attrib.emulate_tpws) 941fd032ee10d2816c947f5d5b9abda95e728f0a8fChristoph Hellwig buf[14] = 0x80; 951fd032ee10d2816c947f5d5b9abda95e728f0a8fChristoph Hellwig 961fd032ee10d2816c947f5d5b9abda95e728f0a8fChristoph Hellwig transport_kunmap_data_sg(cmd); 971fd032ee10d2816c947f5d5b9abda95e728f0a8fChristoph Hellwig 981fd032ee10d2816c947f5d5b9abda95e728f0a8fChristoph Hellwig target_complete_cmd(cmd, GOOD); 991fd032ee10d2816c947f5d5b9abda95e728f0a8fChristoph Hellwig return 0; 1001fd032ee10d2816c947f5d5b9abda95e728f0a8fChristoph Hellwig} 1011fd032ee10d2816c947f5d5b9abda95e728f0a8fChristoph Hellwig 1021fd032ee10d2816c947f5d5b9abda95e728f0a8fChristoph Hellwig/* 1031fd032ee10d2816c947f5d5b9abda95e728f0a8fChristoph Hellwig * Used for TCM/IBLOCK and TCM/FILEIO for block/blk-lib.c level discard support. 1041fd032ee10d2816c947f5d5b9abda95e728f0a8fChristoph Hellwig * Note this is not used for TCM/pSCSI passthrough 1051fd032ee10d2816c947f5d5b9abda95e728f0a8fChristoph Hellwig */ 1061fd032ee10d2816c947f5d5b9abda95e728f0a8fChristoph Hellwigstatic int sbc_emulate_unmap(struct se_cmd *cmd) 1071fd032ee10d2816c947f5d5b9abda95e728f0a8fChristoph Hellwig{ 1081fd032ee10d2816c947f5d5b9abda95e728f0a8fChristoph Hellwig struct se_device *dev = cmd->se_dev; 1091fd032ee10d2816c947f5d5b9abda95e728f0a8fChristoph Hellwig unsigned char *buf, *ptr = NULL; 1101fd032ee10d2816c947f5d5b9abda95e728f0a8fChristoph Hellwig unsigned char *cdb = &cmd->t_task_cdb[0]; 1111fd032ee10d2816c947f5d5b9abda95e728f0a8fChristoph Hellwig sector_t lba; 1121fd032ee10d2816c947f5d5b9abda95e728f0a8fChristoph Hellwig unsigned int size = cmd->data_length, range; 1131fd032ee10d2816c947f5d5b9abda95e728f0a8fChristoph Hellwig int ret = 0, offset; 1141fd032ee10d2816c947f5d5b9abda95e728f0a8fChristoph Hellwig unsigned short dl, bd_dl; 1151fd032ee10d2816c947f5d5b9abda95e728f0a8fChristoph Hellwig 1161fd032ee10d2816c947f5d5b9abda95e728f0a8fChristoph Hellwig if (!dev->transport->do_discard) { 1171fd032ee10d2816c947f5d5b9abda95e728f0a8fChristoph Hellwig pr_err("UNMAP emulation not supported for: %s\n", 1181fd032ee10d2816c947f5d5b9abda95e728f0a8fChristoph Hellwig dev->transport->name); 1191fd032ee10d2816c947f5d5b9abda95e728f0a8fChristoph Hellwig cmd->scsi_sense_reason = TCM_UNSUPPORTED_SCSI_OPCODE; 1201fd032ee10d2816c947f5d5b9abda95e728f0a8fChristoph Hellwig return -ENOSYS; 1211fd032ee10d2816c947f5d5b9abda95e728f0a8fChristoph Hellwig } 1221fd032ee10d2816c947f5d5b9abda95e728f0a8fChristoph Hellwig 1231fd032ee10d2816c947f5d5b9abda95e728f0a8fChristoph Hellwig /* First UNMAP block descriptor starts at 8 byte offset */ 1241fd032ee10d2816c947f5d5b9abda95e728f0a8fChristoph Hellwig offset = 8; 1251fd032ee10d2816c947f5d5b9abda95e728f0a8fChristoph Hellwig size -= 8; 1261fd032ee10d2816c947f5d5b9abda95e728f0a8fChristoph Hellwig dl = get_unaligned_be16(&cdb[0]); 1271fd032ee10d2816c947f5d5b9abda95e728f0a8fChristoph Hellwig bd_dl = get_unaligned_be16(&cdb[2]); 1281fd032ee10d2816c947f5d5b9abda95e728f0a8fChristoph Hellwig 1291fd032ee10d2816c947f5d5b9abda95e728f0a8fChristoph Hellwig buf = transport_kmap_data_sg(cmd); 1301fd032ee10d2816c947f5d5b9abda95e728f0a8fChristoph Hellwig 1311fd032ee10d2816c947f5d5b9abda95e728f0a8fChristoph Hellwig ptr = &buf[offset]; 1321fd032ee10d2816c947f5d5b9abda95e728f0a8fChristoph Hellwig pr_debug("UNMAP: Sub: %s Using dl: %hu bd_dl: %hu size: %hu" 1331fd032ee10d2816c947f5d5b9abda95e728f0a8fChristoph Hellwig " ptr: %p\n", dev->transport->name, dl, bd_dl, size, ptr); 1341fd032ee10d2816c947f5d5b9abda95e728f0a8fChristoph Hellwig 1351fd032ee10d2816c947f5d5b9abda95e728f0a8fChristoph Hellwig while (size) { 1361fd032ee10d2816c947f5d5b9abda95e728f0a8fChristoph Hellwig lba = get_unaligned_be64(&ptr[0]); 1371fd032ee10d2816c947f5d5b9abda95e728f0a8fChristoph Hellwig range = get_unaligned_be32(&ptr[8]); 1381fd032ee10d2816c947f5d5b9abda95e728f0a8fChristoph Hellwig pr_debug("UNMAP: Using lba: %llu and range: %u\n", 1391fd032ee10d2816c947f5d5b9abda95e728f0a8fChristoph Hellwig (unsigned long long)lba, range); 1401fd032ee10d2816c947f5d5b9abda95e728f0a8fChristoph Hellwig 1411fd032ee10d2816c947f5d5b9abda95e728f0a8fChristoph Hellwig ret = dev->transport->do_discard(dev, lba, range); 1421fd032ee10d2816c947f5d5b9abda95e728f0a8fChristoph Hellwig if (ret < 0) { 1431fd032ee10d2816c947f5d5b9abda95e728f0a8fChristoph Hellwig pr_err("blkdev_issue_discard() failed: %d\n", 1441fd032ee10d2816c947f5d5b9abda95e728f0a8fChristoph Hellwig ret); 1451fd032ee10d2816c947f5d5b9abda95e728f0a8fChristoph Hellwig goto err; 1461fd032ee10d2816c947f5d5b9abda95e728f0a8fChristoph Hellwig } 1471fd032ee10d2816c947f5d5b9abda95e728f0a8fChristoph Hellwig 1481fd032ee10d2816c947f5d5b9abda95e728f0a8fChristoph Hellwig ptr += 16; 1491fd032ee10d2816c947f5d5b9abda95e728f0a8fChristoph Hellwig size -= 16; 1501fd032ee10d2816c947f5d5b9abda95e728f0a8fChristoph Hellwig } 1511fd032ee10d2816c947f5d5b9abda95e728f0a8fChristoph Hellwig 1521fd032ee10d2816c947f5d5b9abda95e728f0a8fChristoph Hellwigerr: 1531fd032ee10d2816c947f5d5b9abda95e728f0a8fChristoph Hellwig transport_kunmap_data_sg(cmd); 1541fd032ee10d2816c947f5d5b9abda95e728f0a8fChristoph Hellwig if (!ret) 1551fd032ee10d2816c947f5d5b9abda95e728f0a8fChristoph Hellwig target_complete_cmd(cmd, GOOD); 1561fd032ee10d2816c947f5d5b9abda95e728f0a8fChristoph Hellwig return ret; 1571fd032ee10d2816c947f5d5b9abda95e728f0a8fChristoph Hellwig} 1581fd032ee10d2816c947f5d5b9abda95e728f0a8fChristoph Hellwig 1591fd032ee10d2816c947f5d5b9abda95e728f0a8fChristoph Hellwig/* 1601fd032ee10d2816c947f5d5b9abda95e728f0a8fChristoph Hellwig * Used for TCM/IBLOCK and TCM/FILEIO for block/blk-lib.c level discard support. 1611fd032ee10d2816c947f5d5b9abda95e728f0a8fChristoph Hellwig * Note this is not used for TCM/pSCSI passthrough 1621fd032ee10d2816c947f5d5b9abda95e728f0a8fChristoph Hellwig */ 1631fd032ee10d2816c947f5d5b9abda95e728f0a8fChristoph Hellwigstatic int sbc_emulate_write_same(struct se_cmd *cmd) 1641fd032ee10d2816c947f5d5b9abda95e728f0a8fChristoph Hellwig{ 1651fd032ee10d2816c947f5d5b9abda95e728f0a8fChristoph Hellwig struct se_device *dev = cmd->se_dev; 1661fd032ee10d2816c947f5d5b9abda95e728f0a8fChristoph Hellwig sector_t range; 1671fd032ee10d2816c947f5d5b9abda95e728f0a8fChristoph Hellwig sector_t lba = cmd->t_task_lba; 1681fd032ee10d2816c947f5d5b9abda95e728f0a8fChristoph Hellwig u32 num_blocks; 1691fd032ee10d2816c947f5d5b9abda95e728f0a8fChristoph Hellwig int ret; 1701fd032ee10d2816c947f5d5b9abda95e728f0a8fChristoph Hellwig 1711fd032ee10d2816c947f5d5b9abda95e728f0a8fChristoph Hellwig if (!dev->transport->do_discard) { 1721fd032ee10d2816c947f5d5b9abda95e728f0a8fChristoph Hellwig pr_err("WRITE_SAME emulation not supported" 1731fd032ee10d2816c947f5d5b9abda95e728f0a8fChristoph Hellwig " for: %s\n", dev->transport->name); 1741fd032ee10d2816c947f5d5b9abda95e728f0a8fChristoph Hellwig cmd->scsi_sense_reason = TCM_UNSUPPORTED_SCSI_OPCODE; 1751fd032ee10d2816c947f5d5b9abda95e728f0a8fChristoph Hellwig return -ENOSYS; 1761fd032ee10d2816c947f5d5b9abda95e728f0a8fChristoph Hellwig } 1771fd032ee10d2816c947f5d5b9abda95e728f0a8fChristoph Hellwig 1781fd032ee10d2816c947f5d5b9abda95e728f0a8fChristoph Hellwig if (cmd->t_task_cdb[0] == WRITE_SAME) 1791fd032ee10d2816c947f5d5b9abda95e728f0a8fChristoph Hellwig num_blocks = get_unaligned_be16(&cmd->t_task_cdb[7]); 1801fd032ee10d2816c947f5d5b9abda95e728f0a8fChristoph Hellwig else if (cmd->t_task_cdb[0] == WRITE_SAME_16) 1811fd032ee10d2816c947f5d5b9abda95e728f0a8fChristoph Hellwig num_blocks = get_unaligned_be32(&cmd->t_task_cdb[10]); 1821fd032ee10d2816c947f5d5b9abda95e728f0a8fChristoph Hellwig else /* WRITE_SAME_32 via VARIABLE_LENGTH_CMD */ 1831fd032ee10d2816c947f5d5b9abda95e728f0a8fChristoph Hellwig num_blocks = get_unaligned_be32(&cmd->t_task_cdb[28]); 1841fd032ee10d2816c947f5d5b9abda95e728f0a8fChristoph Hellwig 1851fd032ee10d2816c947f5d5b9abda95e728f0a8fChristoph Hellwig /* 1861fd032ee10d2816c947f5d5b9abda95e728f0a8fChristoph Hellwig * Use the explicit range when non zero is supplied, otherwise calculate 1871fd032ee10d2816c947f5d5b9abda95e728f0a8fChristoph Hellwig * the remaining range based on ->get_blocks() - starting LBA. 1881fd032ee10d2816c947f5d5b9abda95e728f0a8fChristoph Hellwig */ 1891fd032ee10d2816c947f5d5b9abda95e728f0a8fChristoph Hellwig if (num_blocks != 0) 1901fd032ee10d2816c947f5d5b9abda95e728f0a8fChristoph Hellwig range = num_blocks; 1911fd032ee10d2816c947f5d5b9abda95e728f0a8fChristoph Hellwig else 1921fd032ee10d2816c947f5d5b9abda95e728f0a8fChristoph Hellwig range = (dev->transport->get_blocks(dev) - lba) + 1; 1931fd032ee10d2816c947f5d5b9abda95e728f0a8fChristoph Hellwig 1941fd032ee10d2816c947f5d5b9abda95e728f0a8fChristoph Hellwig pr_debug("WRITE_SAME UNMAP: LBA: %llu Range: %llu\n", 1951fd032ee10d2816c947f5d5b9abda95e728f0a8fChristoph Hellwig (unsigned long long)lba, (unsigned long long)range); 1961fd032ee10d2816c947f5d5b9abda95e728f0a8fChristoph Hellwig 1971fd032ee10d2816c947f5d5b9abda95e728f0a8fChristoph Hellwig ret = dev->transport->do_discard(dev, lba, range); 1981fd032ee10d2816c947f5d5b9abda95e728f0a8fChristoph Hellwig if (ret < 0) { 1991fd032ee10d2816c947f5d5b9abda95e728f0a8fChristoph Hellwig pr_debug("blkdev_issue_discard() failed for WRITE_SAME\n"); 2001fd032ee10d2816c947f5d5b9abda95e728f0a8fChristoph Hellwig return ret; 2011fd032ee10d2816c947f5d5b9abda95e728f0a8fChristoph Hellwig } 2021fd032ee10d2816c947f5d5b9abda95e728f0a8fChristoph Hellwig 2031fd032ee10d2816c947f5d5b9abda95e728f0a8fChristoph Hellwig target_complete_cmd(cmd, GOOD); 2041fd032ee10d2816c947f5d5b9abda95e728f0a8fChristoph Hellwig return 0; 2051fd032ee10d2816c947f5d5b9abda95e728f0a8fChristoph Hellwig} 2061fd032ee10d2816c947f5d5b9abda95e728f0a8fChristoph Hellwig 2071fd032ee10d2816c947f5d5b9abda95e728f0a8fChristoph Hellwigstatic int sbc_emulate_synchronize_cache(struct se_cmd *cmd) 2081fd032ee10d2816c947f5d5b9abda95e728f0a8fChristoph Hellwig{ 2091fd032ee10d2816c947f5d5b9abda95e728f0a8fChristoph Hellwig if (!cmd->se_dev->transport->do_sync_cache) { 2101fd032ee10d2816c947f5d5b9abda95e728f0a8fChristoph Hellwig pr_err("SYNCHRONIZE_CACHE emulation not supported" 2111fd032ee10d2816c947f5d5b9abda95e728f0a8fChristoph Hellwig " for: %s\n", cmd->se_dev->transport->name); 2121fd032ee10d2816c947f5d5b9abda95e728f0a8fChristoph Hellwig cmd->scsi_sense_reason = TCM_UNSUPPORTED_SCSI_OPCODE; 2131fd032ee10d2816c947f5d5b9abda95e728f0a8fChristoph Hellwig return -ENOSYS; 2141fd032ee10d2816c947f5d5b9abda95e728f0a8fChristoph Hellwig } 2151fd032ee10d2816c947f5d5b9abda95e728f0a8fChristoph Hellwig 2161fd032ee10d2816c947f5d5b9abda95e728f0a8fChristoph Hellwig cmd->se_dev->transport->do_sync_cache(cmd); 2171fd032ee10d2816c947f5d5b9abda95e728f0a8fChristoph Hellwig return 0; 2181fd032ee10d2816c947f5d5b9abda95e728f0a8fChristoph Hellwig} 2191fd032ee10d2816c947f5d5b9abda95e728f0a8fChristoph Hellwig 2201fd032ee10d2816c947f5d5b9abda95e728f0a8fChristoph Hellwigstatic int sbc_emulate_verify(struct se_cmd *cmd) 2211fd032ee10d2816c947f5d5b9abda95e728f0a8fChristoph Hellwig{ 2221fd032ee10d2816c947f5d5b9abda95e728f0a8fChristoph Hellwig target_complete_cmd(cmd, GOOD); 2231fd032ee10d2816c947f5d5b9abda95e728f0a8fChristoph Hellwig return 0; 2241fd032ee10d2816c947f5d5b9abda95e728f0a8fChristoph Hellwig} 2251fd032ee10d2816c947f5d5b9abda95e728f0a8fChristoph Hellwig 226d6e0175cf3f9737a760482d185bb73566bcc9331Christoph Hellwigstatic inline u32 sbc_get_size(struct se_cmd *cmd, u32 sectors) 227d6e0175cf3f9737a760482d185bb73566bcc9331Christoph Hellwig{ 228d6e0175cf3f9737a760482d185bb73566bcc9331Christoph Hellwig return cmd->se_dev->se_sub_dev->se_dev_attrib.block_size * sectors; 229d6e0175cf3f9737a760482d185bb73566bcc9331Christoph Hellwig} 230d6e0175cf3f9737a760482d185bb73566bcc9331Christoph Hellwig 231d6e0175cf3f9737a760482d185bb73566bcc9331Christoph Hellwigstatic int sbc_check_valid_sectors(struct se_cmd *cmd) 232d6e0175cf3f9737a760482d185bb73566bcc9331Christoph Hellwig{ 233d6e0175cf3f9737a760482d185bb73566bcc9331Christoph Hellwig struct se_device *dev = cmd->se_dev; 234d6e0175cf3f9737a760482d185bb73566bcc9331Christoph Hellwig unsigned long long end_lba; 235d6e0175cf3f9737a760482d185bb73566bcc9331Christoph Hellwig u32 sectors; 236d6e0175cf3f9737a760482d185bb73566bcc9331Christoph Hellwig 237d6e0175cf3f9737a760482d185bb73566bcc9331Christoph Hellwig sectors = cmd->data_length / dev->se_sub_dev->se_dev_attrib.block_size; 238d6e0175cf3f9737a760482d185bb73566bcc9331Christoph Hellwig end_lba = dev->transport->get_blocks(dev) + 1; 239d6e0175cf3f9737a760482d185bb73566bcc9331Christoph Hellwig 240d6e0175cf3f9737a760482d185bb73566bcc9331Christoph Hellwig if (cmd->t_task_lba + sectors > end_lba) { 241d6e0175cf3f9737a760482d185bb73566bcc9331Christoph Hellwig pr_err("target: lba %llu, sectors %u exceeds end lba %llu\n", 242d6e0175cf3f9737a760482d185bb73566bcc9331Christoph Hellwig cmd->t_task_lba, sectors, end_lba); 243d6e0175cf3f9737a760482d185bb73566bcc9331Christoph Hellwig return -EINVAL; 244d6e0175cf3f9737a760482d185bb73566bcc9331Christoph Hellwig } 245d6e0175cf3f9737a760482d185bb73566bcc9331Christoph Hellwig 246d6e0175cf3f9737a760482d185bb73566bcc9331Christoph Hellwig return 0; 247d6e0175cf3f9737a760482d185bb73566bcc9331Christoph Hellwig} 248d6e0175cf3f9737a760482d185bb73566bcc9331Christoph Hellwig 249d6e0175cf3f9737a760482d185bb73566bcc9331Christoph Hellwigstatic inline u32 transport_get_sectors_6(unsigned char *cdb) 250d6e0175cf3f9737a760482d185bb73566bcc9331Christoph Hellwig{ 251d6e0175cf3f9737a760482d185bb73566bcc9331Christoph Hellwig /* 252d6e0175cf3f9737a760482d185bb73566bcc9331Christoph Hellwig * Use 8-bit sector value. SBC-3 says: 253d6e0175cf3f9737a760482d185bb73566bcc9331Christoph Hellwig * 254d6e0175cf3f9737a760482d185bb73566bcc9331Christoph Hellwig * A TRANSFER LENGTH field set to zero specifies that 256 255d6e0175cf3f9737a760482d185bb73566bcc9331Christoph Hellwig * logical blocks shall be written. Any other value 256d6e0175cf3f9737a760482d185bb73566bcc9331Christoph Hellwig * specifies the number of logical blocks that shall be 257d6e0175cf3f9737a760482d185bb73566bcc9331Christoph Hellwig * written. 258d6e0175cf3f9737a760482d185bb73566bcc9331Christoph Hellwig */ 259d6e0175cf3f9737a760482d185bb73566bcc9331Christoph Hellwig return cdb[4] ? : 256; 260d6e0175cf3f9737a760482d185bb73566bcc9331Christoph Hellwig} 261d6e0175cf3f9737a760482d185bb73566bcc9331Christoph Hellwig 262d6e0175cf3f9737a760482d185bb73566bcc9331Christoph Hellwigstatic inline u32 transport_get_sectors_10(unsigned char *cdb) 263d6e0175cf3f9737a760482d185bb73566bcc9331Christoph Hellwig{ 264d6e0175cf3f9737a760482d185bb73566bcc9331Christoph Hellwig return (u32)(cdb[7] << 8) + cdb[8]; 265d6e0175cf3f9737a760482d185bb73566bcc9331Christoph Hellwig} 266d6e0175cf3f9737a760482d185bb73566bcc9331Christoph Hellwig 267d6e0175cf3f9737a760482d185bb73566bcc9331Christoph Hellwigstatic inline u32 transport_get_sectors_12(unsigned char *cdb) 268d6e0175cf3f9737a760482d185bb73566bcc9331Christoph Hellwig{ 269d6e0175cf3f9737a760482d185bb73566bcc9331Christoph Hellwig return (u32)(cdb[6] << 24) + (cdb[7] << 16) + (cdb[8] << 8) + cdb[9]; 270d6e0175cf3f9737a760482d185bb73566bcc9331Christoph Hellwig} 271d6e0175cf3f9737a760482d185bb73566bcc9331Christoph Hellwig 272d6e0175cf3f9737a760482d185bb73566bcc9331Christoph Hellwigstatic inline u32 transport_get_sectors_16(unsigned char *cdb) 273d6e0175cf3f9737a760482d185bb73566bcc9331Christoph Hellwig{ 274d6e0175cf3f9737a760482d185bb73566bcc9331Christoph Hellwig return (u32)(cdb[10] << 24) + (cdb[11] << 16) + 275d6e0175cf3f9737a760482d185bb73566bcc9331Christoph Hellwig (cdb[12] << 8) + cdb[13]; 276d6e0175cf3f9737a760482d185bb73566bcc9331Christoph Hellwig} 277d6e0175cf3f9737a760482d185bb73566bcc9331Christoph Hellwig 278d6e0175cf3f9737a760482d185bb73566bcc9331Christoph Hellwig/* 279d6e0175cf3f9737a760482d185bb73566bcc9331Christoph Hellwig * Used for VARIABLE_LENGTH_CDB WRITE_32 and READ_32 variants 280d6e0175cf3f9737a760482d185bb73566bcc9331Christoph Hellwig */ 281d6e0175cf3f9737a760482d185bb73566bcc9331Christoph Hellwigstatic inline u32 transport_get_sectors_32(unsigned char *cdb) 282d6e0175cf3f9737a760482d185bb73566bcc9331Christoph Hellwig{ 283d6e0175cf3f9737a760482d185bb73566bcc9331Christoph Hellwig return (u32)(cdb[28] << 24) + (cdb[29] << 16) + 284d6e0175cf3f9737a760482d185bb73566bcc9331Christoph Hellwig (cdb[30] << 8) + cdb[31]; 285d6e0175cf3f9737a760482d185bb73566bcc9331Christoph Hellwig 286d6e0175cf3f9737a760482d185bb73566bcc9331Christoph Hellwig} 287d6e0175cf3f9737a760482d185bb73566bcc9331Christoph Hellwig 288d6e0175cf3f9737a760482d185bb73566bcc9331Christoph Hellwigstatic inline u32 transport_lba_21(unsigned char *cdb) 289d6e0175cf3f9737a760482d185bb73566bcc9331Christoph Hellwig{ 290d6e0175cf3f9737a760482d185bb73566bcc9331Christoph Hellwig return ((cdb[1] & 0x1f) << 16) | (cdb[2] << 8) | cdb[3]; 291d6e0175cf3f9737a760482d185bb73566bcc9331Christoph Hellwig} 292d6e0175cf3f9737a760482d185bb73566bcc9331Christoph Hellwig 293d6e0175cf3f9737a760482d185bb73566bcc9331Christoph Hellwigstatic inline u32 transport_lba_32(unsigned char *cdb) 294d6e0175cf3f9737a760482d185bb73566bcc9331Christoph Hellwig{ 295d6e0175cf3f9737a760482d185bb73566bcc9331Christoph Hellwig return (cdb[2] << 24) | (cdb[3] << 16) | (cdb[4] << 8) | cdb[5]; 296d6e0175cf3f9737a760482d185bb73566bcc9331Christoph Hellwig} 297d6e0175cf3f9737a760482d185bb73566bcc9331Christoph Hellwig 298d6e0175cf3f9737a760482d185bb73566bcc9331Christoph Hellwigstatic inline unsigned long long transport_lba_64(unsigned char *cdb) 299d6e0175cf3f9737a760482d185bb73566bcc9331Christoph Hellwig{ 300d6e0175cf3f9737a760482d185bb73566bcc9331Christoph Hellwig unsigned int __v1, __v2; 301d6e0175cf3f9737a760482d185bb73566bcc9331Christoph Hellwig 302d6e0175cf3f9737a760482d185bb73566bcc9331Christoph Hellwig __v1 = (cdb[2] << 24) | (cdb[3] << 16) | (cdb[4] << 8) | cdb[5]; 303d6e0175cf3f9737a760482d185bb73566bcc9331Christoph Hellwig __v2 = (cdb[6] << 24) | (cdb[7] << 16) | (cdb[8] << 8) | cdb[9]; 304d6e0175cf3f9737a760482d185bb73566bcc9331Christoph Hellwig 305d6e0175cf3f9737a760482d185bb73566bcc9331Christoph Hellwig return ((unsigned long long)__v2) | (unsigned long long)__v1 << 32; 306d6e0175cf3f9737a760482d185bb73566bcc9331Christoph Hellwig} 307d6e0175cf3f9737a760482d185bb73566bcc9331Christoph Hellwig 308d6e0175cf3f9737a760482d185bb73566bcc9331Christoph Hellwig/* 309d6e0175cf3f9737a760482d185bb73566bcc9331Christoph Hellwig * For VARIABLE_LENGTH_CDB w/ 32 byte extended CDBs 310d6e0175cf3f9737a760482d185bb73566bcc9331Christoph Hellwig */ 311d6e0175cf3f9737a760482d185bb73566bcc9331Christoph Hellwigstatic inline unsigned long long transport_lba_64_ext(unsigned char *cdb) 312d6e0175cf3f9737a760482d185bb73566bcc9331Christoph Hellwig{ 313d6e0175cf3f9737a760482d185bb73566bcc9331Christoph Hellwig unsigned int __v1, __v2; 314d6e0175cf3f9737a760482d185bb73566bcc9331Christoph Hellwig 315d6e0175cf3f9737a760482d185bb73566bcc9331Christoph Hellwig __v1 = (cdb[12] << 24) | (cdb[13] << 16) | (cdb[14] << 8) | cdb[15]; 316d6e0175cf3f9737a760482d185bb73566bcc9331Christoph Hellwig __v2 = (cdb[16] << 24) | (cdb[17] << 16) | (cdb[18] << 8) | cdb[19]; 317d6e0175cf3f9737a760482d185bb73566bcc9331Christoph Hellwig 318d6e0175cf3f9737a760482d185bb73566bcc9331Christoph Hellwig return ((unsigned long long)__v2) | (unsigned long long)__v1 << 32; 319d6e0175cf3f9737a760482d185bb73566bcc9331Christoph Hellwig} 320d6e0175cf3f9737a760482d185bb73566bcc9331Christoph Hellwig 321d6e0175cf3f9737a760482d185bb73566bcc9331Christoph Hellwigstatic int sbc_write_same_supported(struct se_device *dev, 322d6e0175cf3f9737a760482d185bb73566bcc9331Christoph Hellwig unsigned char *flags) 323d6e0175cf3f9737a760482d185bb73566bcc9331Christoph Hellwig{ 324d6e0175cf3f9737a760482d185bb73566bcc9331Christoph Hellwig if ((flags[0] & 0x04) || (flags[0] & 0x02)) { 325d6e0175cf3f9737a760482d185bb73566bcc9331Christoph Hellwig pr_err("WRITE_SAME PBDATA and LBDATA" 326d6e0175cf3f9737a760482d185bb73566bcc9331Christoph Hellwig " bits not supported for Block Discard" 327d6e0175cf3f9737a760482d185bb73566bcc9331Christoph Hellwig " Emulation\n"); 328d6e0175cf3f9737a760482d185bb73566bcc9331Christoph Hellwig return -ENOSYS; 329d6e0175cf3f9737a760482d185bb73566bcc9331Christoph Hellwig } 330d6e0175cf3f9737a760482d185bb73566bcc9331Christoph Hellwig 331d6e0175cf3f9737a760482d185bb73566bcc9331Christoph Hellwig /* 332d6e0175cf3f9737a760482d185bb73566bcc9331Christoph Hellwig * Currently for the emulated case we only accept 333d6e0175cf3f9737a760482d185bb73566bcc9331Christoph Hellwig * tpws with the UNMAP=1 bit set. 334d6e0175cf3f9737a760482d185bb73566bcc9331Christoph Hellwig */ 335d6e0175cf3f9737a760482d185bb73566bcc9331Christoph Hellwig if (!(flags[0] & 0x08)) { 336d6e0175cf3f9737a760482d185bb73566bcc9331Christoph Hellwig pr_err("WRITE_SAME w/o UNMAP bit not" 337d6e0175cf3f9737a760482d185bb73566bcc9331Christoph Hellwig " supported for Block Discard Emulation\n"); 338d6e0175cf3f9737a760482d185bb73566bcc9331Christoph Hellwig return -ENOSYS; 339d6e0175cf3f9737a760482d185bb73566bcc9331Christoph Hellwig } 340d6e0175cf3f9737a760482d185bb73566bcc9331Christoph Hellwig 341d6e0175cf3f9737a760482d185bb73566bcc9331Christoph Hellwig return 0; 342d6e0175cf3f9737a760482d185bb73566bcc9331Christoph Hellwig} 343d6e0175cf3f9737a760482d185bb73566bcc9331Christoph Hellwig 344d6e0175cf3f9737a760482d185bb73566bcc9331Christoph Hellwigstatic void xdreadwrite_callback(struct se_cmd *cmd) 345d6e0175cf3f9737a760482d185bb73566bcc9331Christoph Hellwig{ 346d6e0175cf3f9737a760482d185bb73566bcc9331Christoph Hellwig unsigned char *buf, *addr; 347d6e0175cf3f9737a760482d185bb73566bcc9331Christoph Hellwig struct scatterlist *sg; 348d6e0175cf3f9737a760482d185bb73566bcc9331Christoph Hellwig unsigned int offset; 349d6e0175cf3f9737a760482d185bb73566bcc9331Christoph Hellwig int i; 350d6e0175cf3f9737a760482d185bb73566bcc9331Christoph Hellwig int count; 351d6e0175cf3f9737a760482d185bb73566bcc9331Christoph Hellwig /* 352d6e0175cf3f9737a760482d185bb73566bcc9331Christoph Hellwig * From sbc3r22.pdf section 5.48 XDWRITEREAD (10) command 353d6e0175cf3f9737a760482d185bb73566bcc9331Christoph Hellwig * 354d6e0175cf3f9737a760482d185bb73566bcc9331Christoph Hellwig * 1) read the specified logical block(s); 355d6e0175cf3f9737a760482d185bb73566bcc9331Christoph Hellwig * 2) transfer logical blocks from the data-out buffer; 356d6e0175cf3f9737a760482d185bb73566bcc9331Christoph Hellwig * 3) XOR the logical blocks transferred from the data-out buffer with 357d6e0175cf3f9737a760482d185bb73566bcc9331Christoph Hellwig * the logical blocks read, storing the resulting XOR data in a buffer; 358d6e0175cf3f9737a760482d185bb73566bcc9331Christoph Hellwig * 4) if the DISABLE WRITE bit is set to zero, then write the logical 359d6e0175cf3f9737a760482d185bb73566bcc9331Christoph Hellwig * blocks transferred from the data-out buffer; and 360d6e0175cf3f9737a760482d185bb73566bcc9331Christoph Hellwig * 5) transfer the resulting XOR data to the data-in buffer. 361d6e0175cf3f9737a760482d185bb73566bcc9331Christoph Hellwig */ 362d6e0175cf3f9737a760482d185bb73566bcc9331Christoph Hellwig buf = kmalloc(cmd->data_length, GFP_KERNEL); 363d6e0175cf3f9737a760482d185bb73566bcc9331Christoph Hellwig if (!buf) { 364d6e0175cf3f9737a760482d185bb73566bcc9331Christoph Hellwig pr_err("Unable to allocate xor_callback buf\n"); 365d6e0175cf3f9737a760482d185bb73566bcc9331Christoph Hellwig return; 366d6e0175cf3f9737a760482d185bb73566bcc9331Christoph Hellwig } 367d6e0175cf3f9737a760482d185bb73566bcc9331Christoph Hellwig /* 368d6e0175cf3f9737a760482d185bb73566bcc9331Christoph Hellwig * Copy the scatterlist WRITE buffer located at cmd->t_data_sg 369d6e0175cf3f9737a760482d185bb73566bcc9331Christoph Hellwig * into the locally allocated *buf 370d6e0175cf3f9737a760482d185bb73566bcc9331Christoph Hellwig */ 371d6e0175cf3f9737a760482d185bb73566bcc9331Christoph Hellwig sg_copy_to_buffer(cmd->t_data_sg, 372d6e0175cf3f9737a760482d185bb73566bcc9331Christoph Hellwig cmd->t_data_nents, 373d6e0175cf3f9737a760482d185bb73566bcc9331Christoph Hellwig buf, 374d6e0175cf3f9737a760482d185bb73566bcc9331Christoph Hellwig cmd->data_length); 375d6e0175cf3f9737a760482d185bb73566bcc9331Christoph Hellwig 376d6e0175cf3f9737a760482d185bb73566bcc9331Christoph Hellwig /* 377d6e0175cf3f9737a760482d185bb73566bcc9331Christoph Hellwig * Now perform the XOR against the BIDI read memory located at 378d6e0175cf3f9737a760482d185bb73566bcc9331Christoph Hellwig * cmd->t_mem_bidi_list 379d6e0175cf3f9737a760482d185bb73566bcc9331Christoph Hellwig */ 380d6e0175cf3f9737a760482d185bb73566bcc9331Christoph Hellwig 381d6e0175cf3f9737a760482d185bb73566bcc9331Christoph Hellwig offset = 0; 382d6e0175cf3f9737a760482d185bb73566bcc9331Christoph Hellwig for_each_sg(cmd->t_bidi_data_sg, sg, cmd->t_bidi_data_nents, count) { 383d6e0175cf3f9737a760482d185bb73566bcc9331Christoph Hellwig addr = kmap_atomic(sg_page(sg)); 384d6e0175cf3f9737a760482d185bb73566bcc9331Christoph Hellwig if (!addr) 385d6e0175cf3f9737a760482d185bb73566bcc9331Christoph Hellwig goto out; 386d6e0175cf3f9737a760482d185bb73566bcc9331Christoph Hellwig 387d6e0175cf3f9737a760482d185bb73566bcc9331Christoph Hellwig for (i = 0; i < sg->length; i++) 388d6e0175cf3f9737a760482d185bb73566bcc9331Christoph Hellwig *(addr + sg->offset + i) ^= *(buf + offset + i); 389d6e0175cf3f9737a760482d185bb73566bcc9331Christoph Hellwig 390d6e0175cf3f9737a760482d185bb73566bcc9331Christoph Hellwig offset += sg->length; 391d6e0175cf3f9737a760482d185bb73566bcc9331Christoph Hellwig kunmap_atomic(addr); 392d6e0175cf3f9737a760482d185bb73566bcc9331Christoph Hellwig } 393d6e0175cf3f9737a760482d185bb73566bcc9331Christoph Hellwig 394d6e0175cf3f9737a760482d185bb73566bcc9331Christoph Hellwigout: 395d6e0175cf3f9737a760482d185bb73566bcc9331Christoph Hellwig kfree(buf); 396d6e0175cf3f9737a760482d185bb73566bcc9331Christoph Hellwig} 397d6e0175cf3f9737a760482d185bb73566bcc9331Christoph Hellwig 3980c2ad7d1132d8b089b1d37875917858e03610019Christoph Hellwigint sbc_parse_cdb(struct se_cmd *cmd, struct spc_ops *ops) 399d6e0175cf3f9737a760482d185bb73566bcc9331Christoph Hellwig{ 400d6e0175cf3f9737a760482d185bb73566bcc9331Christoph Hellwig struct se_subsystem_dev *su_dev = cmd->se_dev->se_sub_dev; 401d6e0175cf3f9737a760482d185bb73566bcc9331Christoph Hellwig struct se_device *dev = cmd->se_dev; 402d6e0175cf3f9737a760482d185bb73566bcc9331Christoph Hellwig unsigned char *cdb = cmd->t_task_cdb; 4031fd032ee10d2816c947f5d5b9abda95e728f0a8fChristoph Hellwig unsigned int size; 404d6e0175cf3f9737a760482d185bb73566bcc9331Christoph Hellwig u32 sectors = 0; 405d6e0175cf3f9737a760482d185bb73566bcc9331Christoph Hellwig int ret; 406d6e0175cf3f9737a760482d185bb73566bcc9331Christoph Hellwig 407d6e0175cf3f9737a760482d185bb73566bcc9331Christoph Hellwig switch (cdb[0]) { 408d6e0175cf3f9737a760482d185bb73566bcc9331Christoph Hellwig case READ_6: 409d6e0175cf3f9737a760482d185bb73566bcc9331Christoph Hellwig sectors = transport_get_sectors_6(cdb); 410d6e0175cf3f9737a760482d185bb73566bcc9331Christoph Hellwig cmd->t_task_lba = transport_lba_21(cdb); 411d6e0175cf3f9737a760482d185bb73566bcc9331Christoph Hellwig cmd->se_cmd_flags |= SCF_SCSI_DATA_CDB; 4120c2ad7d1132d8b089b1d37875917858e03610019Christoph Hellwig cmd->execute_cmd = ops->execute_rw; 413d6e0175cf3f9737a760482d185bb73566bcc9331Christoph Hellwig break; 414d6e0175cf3f9737a760482d185bb73566bcc9331Christoph Hellwig case READ_10: 415d6e0175cf3f9737a760482d185bb73566bcc9331Christoph Hellwig sectors = transport_get_sectors_10(cdb); 416d6e0175cf3f9737a760482d185bb73566bcc9331Christoph Hellwig cmd->t_task_lba = transport_lba_32(cdb); 417d6e0175cf3f9737a760482d185bb73566bcc9331Christoph Hellwig cmd->se_cmd_flags |= SCF_SCSI_DATA_CDB; 4180c2ad7d1132d8b089b1d37875917858e03610019Christoph Hellwig cmd->execute_cmd = ops->execute_rw; 419d6e0175cf3f9737a760482d185bb73566bcc9331Christoph Hellwig break; 420d6e0175cf3f9737a760482d185bb73566bcc9331Christoph Hellwig case READ_12: 421d6e0175cf3f9737a760482d185bb73566bcc9331Christoph Hellwig sectors = transport_get_sectors_12(cdb); 422d6e0175cf3f9737a760482d185bb73566bcc9331Christoph Hellwig cmd->t_task_lba = transport_lba_32(cdb); 423d6e0175cf3f9737a760482d185bb73566bcc9331Christoph Hellwig cmd->se_cmd_flags |= SCF_SCSI_DATA_CDB; 4240c2ad7d1132d8b089b1d37875917858e03610019Christoph Hellwig cmd->execute_cmd = ops->execute_rw; 425d6e0175cf3f9737a760482d185bb73566bcc9331Christoph Hellwig break; 426d6e0175cf3f9737a760482d185bb73566bcc9331Christoph Hellwig case READ_16: 427d6e0175cf3f9737a760482d185bb73566bcc9331Christoph Hellwig sectors = transport_get_sectors_16(cdb); 428d6e0175cf3f9737a760482d185bb73566bcc9331Christoph Hellwig cmd->t_task_lba = transport_lba_64(cdb); 429d6e0175cf3f9737a760482d185bb73566bcc9331Christoph Hellwig cmd->se_cmd_flags |= SCF_SCSI_DATA_CDB; 4300c2ad7d1132d8b089b1d37875917858e03610019Christoph Hellwig cmd->execute_cmd = ops->execute_rw; 431d6e0175cf3f9737a760482d185bb73566bcc9331Christoph Hellwig break; 432d6e0175cf3f9737a760482d185bb73566bcc9331Christoph Hellwig case WRITE_6: 433d6e0175cf3f9737a760482d185bb73566bcc9331Christoph Hellwig sectors = transport_get_sectors_6(cdb); 434d6e0175cf3f9737a760482d185bb73566bcc9331Christoph Hellwig cmd->t_task_lba = transport_lba_21(cdb); 435d6e0175cf3f9737a760482d185bb73566bcc9331Christoph Hellwig cmd->se_cmd_flags |= SCF_SCSI_DATA_CDB; 4360c2ad7d1132d8b089b1d37875917858e03610019Christoph Hellwig cmd->execute_cmd = ops->execute_rw; 437d6e0175cf3f9737a760482d185bb73566bcc9331Christoph Hellwig break; 438d6e0175cf3f9737a760482d185bb73566bcc9331Christoph Hellwig case WRITE_10: 439d6e0175cf3f9737a760482d185bb73566bcc9331Christoph Hellwig case WRITE_VERIFY: 440d6e0175cf3f9737a760482d185bb73566bcc9331Christoph Hellwig sectors = transport_get_sectors_10(cdb); 441d6e0175cf3f9737a760482d185bb73566bcc9331Christoph Hellwig cmd->t_task_lba = transport_lba_32(cdb); 442d6e0175cf3f9737a760482d185bb73566bcc9331Christoph Hellwig if (cdb[1] & 0x8) 443d6e0175cf3f9737a760482d185bb73566bcc9331Christoph Hellwig cmd->se_cmd_flags |= SCF_FUA; 444d6e0175cf3f9737a760482d185bb73566bcc9331Christoph Hellwig cmd->se_cmd_flags |= SCF_SCSI_DATA_CDB; 4450c2ad7d1132d8b089b1d37875917858e03610019Christoph Hellwig cmd->execute_cmd = ops->execute_rw; 446d6e0175cf3f9737a760482d185bb73566bcc9331Christoph Hellwig break; 447d6e0175cf3f9737a760482d185bb73566bcc9331Christoph Hellwig case WRITE_12: 448d6e0175cf3f9737a760482d185bb73566bcc9331Christoph Hellwig sectors = transport_get_sectors_12(cdb); 449d6e0175cf3f9737a760482d185bb73566bcc9331Christoph Hellwig cmd->t_task_lba = transport_lba_32(cdb); 450d6e0175cf3f9737a760482d185bb73566bcc9331Christoph Hellwig if (cdb[1] & 0x8) 451d6e0175cf3f9737a760482d185bb73566bcc9331Christoph Hellwig cmd->se_cmd_flags |= SCF_FUA; 452d6e0175cf3f9737a760482d185bb73566bcc9331Christoph Hellwig cmd->se_cmd_flags |= SCF_SCSI_DATA_CDB; 4530c2ad7d1132d8b089b1d37875917858e03610019Christoph Hellwig cmd->execute_cmd = ops->execute_rw; 454d6e0175cf3f9737a760482d185bb73566bcc9331Christoph Hellwig break; 455d6e0175cf3f9737a760482d185bb73566bcc9331Christoph Hellwig case WRITE_16: 456d6e0175cf3f9737a760482d185bb73566bcc9331Christoph Hellwig sectors = transport_get_sectors_16(cdb); 457d6e0175cf3f9737a760482d185bb73566bcc9331Christoph Hellwig cmd->t_task_lba = transport_lba_64(cdb); 458d6e0175cf3f9737a760482d185bb73566bcc9331Christoph Hellwig if (cdb[1] & 0x8) 459d6e0175cf3f9737a760482d185bb73566bcc9331Christoph Hellwig cmd->se_cmd_flags |= SCF_FUA; 460d6e0175cf3f9737a760482d185bb73566bcc9331Christoph Hellwig cmd->se_cmd_flags |= SCF_SCSI_DATA_CDB; 4610c2ad7d1132d8b089b1d37875917858e03610019Christoph Hellwig cmd->execute_cmd = ops->execute_rw; 462d6e0175cf3f9737a760482d185bb73566bcc9331Christoph Hellwig break; 463d6e0175cf3f9737a760482d185bb73566bcc9331Christoph Hellwig case XDWRITEREAD_10: 464d6e0175cf3f9737a760482d185bb73566bcc9331Christoph Hellwig if ((cmd->data_direction != DMA_TO_DEVICE) || 465d6e0175cf3f9737a760482d185bb73566bcc9331Christoph Hellwig !(cmd->se_cmd_flags & SCF_BIDI)) 466d6e0175cf3f9737a760482d185bb73566bcc9331Christoph Hellwig goto out_invalid_cdb_field; 467d6e0175cf3f9737a760482d185bb73566bcc9331Christoph Hellwig sectors = transport_get_sectors_10(cdb); 468d6e0175cf3f9737a760482d185bb73566bcc9331Christoph Hellwig 469d6e0175cf3f9737a760482d185bb73566bcc9331Christoph Hellwig cmd->t_task_lba = transport_lba_32(cdb); 470d6e0175cf3f9737a760482d185bb73566bcc9331Christoph Hellwig cmd->se_cmd_flags |= SCF_SCSI_DATA_CDB; 471d6e0175cf3f9737a760482d185bb73566bcc9331Christoph Hellwig 472d6e0175cf3f9737a760482d185bb73566bcc9331Christoph Hellwig /* 473d6e0175cf3f9737a760482d185bb73566bcc9331Christoph Hellwig * Setup BIDI XOR callback to be run after I/O completion. 474d6e0175cf3f9737a760482d185bb73566bcc9331Christoph Hellwig */ 4750c2ad7d1132d8b089b1d37875917858e03610019Christoph Hellwig cmd->execute_cmd = ops->execute_rw; 476d6e0175cf3f9737a760482d185bb73566bcc9331Christoph Hellwig cmd->transport_complete_callback = &xdreadwrite_callback; 477d6e0175cf3f9737a760482d185bb73566bcc9331Christoph Hellwig if (cdb[1] & 0x8) 478d6e0175cf3f9737a760482d185bb73566bcc9331Christoph Hellwig cmd->se_cmd_flags |= SCF_FUA; 479d6e0175cf3f9737a760482d185bb73566bcc9331Christoph Hellwig break; 480d6e0175cf3f9737a760482d185bb73566bcc9331Christoph Hellwig case VARIABLE_LENGTH_CMD: 481d6e0175cf3f9737a760482d185bb73566bcc9331Christoph Hellwig { 482d6e0175cf3f9737a760482d185bb73566bcc9331Christoph Hellwig u16 service_action = get_unaligned_be16(&cdb[8]); 483d6e0175cf3f9737a760482d185bb73566bcc9331Christoph Hellwig switch (service_action) { 484d6e0175cf3f9737a760482d185bb73566bcc9331Christoph Hellwig case XDWRITEREAD_32: 485d6e0175cf3f9737a760482d185bb73566bcc9331Christoph Hellwig sectors = transport_get_sectors_32(cdb); 486d6e0175cf3f9737a760482d185bb73566bcc9331Christoph Hellwig 487d6e0175cf3f9737a760482d185bb73566bcc9331Christoph Hellwig /* 488d6e0175cf3f9737a760482d185bb73566bcc9331Christoph Hellwig * Use WRITE_32 and READ_32 opcodes for the emulated 489d6e0175cf3f9737a760482d185bb73566bcc9331Christoph Hellwig * XDWRITE_READ_32 logic. 490d6e0175cf3f9737a760482d185bb73566bcc9331Christoph Hellwig */ 491d6e0175cf3f9737a760482d185bb73566bcc9331Christoph Hellwig cmd->t_task_lba = transport_lba_64_ext(cdb); 492d6e0175cf3f9737a760482d185bb73566bcc9331Christoph Hellwig cmd->se_cmd_flags |= SCF_SCSI_DATA_CDB; 493d6e0175cf3f9737a760482d185bb73566bcc9331Christoph Hellwig 494d6e0175cf3f9737a760482d185bb73566bcc9331Christoph Hellwig /* 495d6e0175cf3f9737a760482d185bb73566bcc9331Christoph Hellwig * Setup BIDI XOR callback to be run during after I/O 496d6e0175cf3f9737a760482d185bb73566bcc9331Christoph Hellwig * completion. 497d6e0175cf3f9737a760482d185bb73566bcc9331Christoph Hellwig */ 4980c2ad7d1132d8b089b1d37875917858e03610019Christoph Hellwig cmd->execute_cmd = ops->execute_rw; 499d6e0175cf3f9737a760482d185bb73566bcc9331Christoph Hellwig cmd->transport_complete_callback = &xdreadwrite_callback; 500d6e0175cf3f9737a760482d185bb73566bcc9331Christoph Hellwig if (cdb[1] & 0x8) 501d6e0175cf3f9737a760482d185bb73566bcc9331Christoph Hellwig cmd->se_cmd_flags |= SCF_FUA; 502d6e0175cf3f9737a760482d185bb73566bcc9331Christoph Hellwig break; 503d6e0175cf3f9737a760482d185bb73566bcc9331Christoph Hellwig case WRITE_SAME_32: 504d6e0175cf3f9737a760482d185bb73566bcc9331Christoph Hellwig sectors = transport_get_sectors_32(cdb); 505d6e0175cf3f9737a760482d185bb73566bcc9331Christoph Hellwig if (!sectors) { 506d6e0175cf3f9737a760482d185bb73566bcc9331Christoph Hellwig pr_err("WSNZ=1, WRITE_SAME w/sectors=0 not" 507d6e0175cf3f9737a760482d185bb73566bcc9331Christoph Hellwig " supported\n"); 508d6e0175cf3f9737a760482d185bb73566bcc9331Christoph Hellwig goto out_invalid_cdb_field; 509d6e0175cf3f9737a760482d185bb73566bcc9331Christoph Hellwig } 510d6e0175cf3f9737a760482d185bb73566bcc9331Christoph Hellwig 5111fd032ee10d2816c947f5d5b9abda95e728f0a8fChristoph Hellwig size = sbc_get_size(cmd, 1); 512d6e0175cf3f9737a760482d185bb73566bcc9331Christoph Hellwig cmd->t_task_lba = get_unaligned_be64(&cdb[12]); 513d6e0175cf3f9737a760482d185bb73566bcc9331Christoph Hellwig 514d6e0175cf3f9737a760482d185bb73566bcc9331Christoph Hellwig if (sbc_write_same_supported(dev, &cdb[10]) < 0) 515d6e0175cf3f9737a760482d185bb73566bcc9331Christoph Hellwig goto out_unsupported_cdb; 5161fd032ee10d2816c947f5d5b9abda95e728f0a8fChristoph Hellwig cmd->execute_cmd = sbc_emulate_write_same; 517d6e0175cf3f9737a760482d185bb73566bcc9331Christoph Hellwig break; 518d6e0175cf3f9737a760482d185bb73566bcc9331Christoph Hellwig default: 519d6e0175cf3f9737a760482d185bb73566bcc9331Christoph Hellwig pr_err("VARIABLE_LENGTH_CMD service action" 520d6e0175cf3f9737a760482d185bb73566bcc9331Christoph Hellwig " 0x%04x not supported\n", service_action); 521d6e0175cf3f9737a760482d185bb73566bcc9331Christoph Hellwig goto out_unsupported_cdb; 522d6e0175cf3f9737a760482d185bb73566bcc9331Christoph Hellwig } 523d6e0175cf3f9737a760482d185bb73566bcc9331Christoph Hellwig break; 524d6e0175cf3f9737a760482d185bb73566bcc9331Christoph Hellwig } 525d6e0175cf3f9737a760482d185bb73566bcc9331Christoph Hellwig case READ_CAPACITY: 5261fd032ee10d2816c947f5d5b9abda95e728f0a8fChristoph Hellwig size = READ_CAP_LEN; 5271fd032ee10d2816c947f5d5b9abda95e728f0a8fChristoph Hellwig cmd->execute_cmd = sbc_emulate_readcapacity; 528d6e0175cf3f9737a760482d185bb73566bcc9331Christoph Hellwig break; 529d6e0175cf3f9737a760482d185bb73566bcc9331Christoph Hellwig case SERVICE_ACTION_IN: 530d6e0175cf3f9737a760482d185bb73566bcc9331Christoph Hellwig switch (cmd->t_task_cdb[1] & 0x1f) { 531d6e0175cf3f9737a760482d185bb73566bcc9331Christoph Hellwig case SAI_READ_CAPACITY_16: 5321fd032ee10d2816c947f5d5b9abda95e728f0a8fChristoph Hellwig cmd->execute_cmd = sbc_emulate_readcapacity_16; 533d6e0175cf3f9737a760482d185bb73566bcc9331Christoph Hellwig break; 534d6e0175cf3f9737a760482d185bb73566bcc9331Christoph Hellwig default: 535d6e0175cf3f9737a760482d185bb73566bcc9331Christoph Hellwig pr_err("Unsupported SA: 0x%02x\n", 536d6e0175cf3f9737a760482d185bb73566bcc9331Christoph Hellwig cmd->t_task_cdb[1] & 0x1f); 537d6e0175cf3f9737a760482d185bb73566bcc9331Christoph Hellwig goto out_invalid_cdb_field; 538d6e0175cf3f9737a760482d185bb73566bcc9331Christoph Hellwig } 5391fd032ee10d2816c947f5d5b9abda95e728f0a8fChristoph Hellwig size = (cdb[10] << 24) | (cdb[11] << 16) | 540d6e0175cf3f9737a760482d185bb73566bcc9331Christoph Hellwig (cdb[12] << 8) | cdb[13]; 541d6e0175cf3f9737a760482d185bb73566bcc9331Christoph Hellwig break; 542d6e0175cf3f9737a760482d185bb73566bcc9331Christoph Hellwig case SYNCHRONIZE_CACHE: 543d6e0175cf3f9737a760482d185bb73566bcc9331Christoph Hellwig case SYNCHRONIZE_CACHE_16: 544d6e0175cf3f9737a760482d185bb73566bcc9331Christoph Hellwig /* 545d6e0175cf3f9737a760482d185bb73566bcc9331Christoph Hellwig * Extract LBA and range to be flushed for emulated SYNCHRONIZE_CACHE 546d6e0175cf3f9737a760482d185bb73566bcc9331Christoph Hellwig */ 547d6e0175cf3f9737a760482d185bb73566bcc9331Christoph Hellwig if (cdb[0] == SYNCHRONIZE_CACHE) { 548d6e0175cf3f9737a760482d185bb73566bcc9331Christoph Hellwig sectors = transport_get_sectors_10(cdb); 549d6e0175cf3f9737a760482d185bb73566bcc9331Christoph Hellwig cmd->t_task_lba = transport_lba_32(cdb); 550d6e0175cf3f9737a760482d185bb73566bcc9331Christoph Hellwig } else { 551d6e0175cf3f9737a760482d185bb73566bcc9331Christoph Hellwig sectors = transport_get_sectors_16(cdb); 552d6e0175cf3f9737a760482d185bb73566bcc9331Christoph Hellwig cmd->t_task_lba = transport_lba_64(cdb); 553d6e0175cf3f9737a760482d185bb73566bcc9331Christoph Hellwig } 554d6e0175cf3f9737a760482d185bb73566bcc9331Christoph Hellwig 5551fd032ee10d2816c947f5d5b9abda95e728f0a8fChristoph Hellwig size = sbc_get_size(cmd, sectors); 556d6e0175cf3f9737a760482d185bb73566bcc9331Christoph Hellwig 557d6e0175cf3f9737a760482d185bb73566bcc9331Christoph Hellwig /* 558d6e0175cf3f9737a760482d185bb73566bcc9331Christoph Hellwig * Check to ensure that LBA + Range does not exceed past end of 559d6e0175cf3f9737a760482d185bb73566bcc9331Christoph Hellwig * device for IBLOCK and FILEIO ->do_sync_cache() backend calls 560d6e0175cf3f9737a760482d185bb73566bcc9331Christoph Hellwig */ 561d6e0175cf3f9737a760482d185bb73566bcc9331Christoph Hellwig if (cmd->t_task_lba || sectors) { 562d6e0175cf3f9737a760482d185bb73566bcc9331Christoph Hellwig if (sbc_check_valid_sectors(cmd) < 0) 563d6e0175cf3f9737a760482d185bb73566bcc9331Christoph Hellwig goto out_invalid_cdb_field; 564d6e0175cf3f9737a760482d185bb73566bcc9331Christoph Hellwig } 5651fd032ee10d2816c947f5d5b9abda95e728f0a8fChristoph Hellwig cmd->execute_cmd = sbc_emulate_synchronize_cache; 566d6e0175cf3f9737a760482d185bb73566bcc9331Christoph Hellwig break; 567d6e0175cf3f9737a760482d185bb73566bcc9331Christoph Hellwig case UNMAP: 5681fd032ee10d2816c947f5d5b9abda95e728f0a8fChristoph Hellwig size = get_unaligned_be16(&cdb[7]); 5691fd032ee10d2816c947f5d5b9abda95e728f0a8fChristoph Hellwig cmd->execute_cmd = sbc_emulate_unmap; 570d6e0175cf3f9737a760482d185bb73566bcc9331Christoph Hellwig break; 571d6e0175cf3f9737a760482d185bb73566bcc9331Christoph Hellwig case WRITE_SAME_16: 572d6e0175cf3f9737a760482d185bb73566bcc9331Christoph Hellwig sectors = transport_get_sectors_16(cdb); 573d6e0175cf3f9737a760482d185bb73566bcc9331Christoph Hellwig if (!sectors) { 574d6e0175cf3f9737a760482d185bb73566bcc9331Christoph Hellwig pr_err("WSNZ=1, WRITE_SAME w/sectors=0 not supported\n"); 575d6e0175cf3f9737a760482d185bb73566bcc9331Christoph Hellwig goto out_invalid_cdb_field; 576d6e0175cf3f9737a760482d185bb73566bcc9331Christoph Hellwig } 577d6e0175cf3f9737a760482d185bb73566bcc9331Christoph Hellwig 5781fd032ee10d2816c947f5d5b9abda95e728f0a8fChristoph Hellwig size = sbc_get_size(cmd, 1); 579d6e0175cf3f9737a760482d185bb73566bcc9331Christoph Hellwig cmd->t_task_lba = get_unaligned_be64(&cdb[2]); 580d6e0175cf3f9737a760482d185bb73566bcc9331Christoph Hellwig 581d6e0175cf3f9737a760482d185bb73566bcc9331Christoph Hellwig if (sbc_write_same_supported(dev, &cdb[1]) < 0) 582d6e0175cf3f9737a760482d185bb73566bcc9331Christoph Hellwig goto out_unsupported_cdb; 5831fd032ee10d2816c947f5d5b9abda95e728f0a8fChristoph Hellwig cmd->execute_cmd = sbc_emulate_write_same; 584d6e0175cf3f9737a760482d185bb73566bcc9331Christoph Hellwig break; 585d6e0175cf3f9737a760482d185bb73566bcc9331Christoph Hellwig case WRITE_SAME: 586d6e0175cf3f9737a760482d185bb73566bcc9331Christoph Hellwig sectors = transport_get_sectors_10(cdb); 587d6e0175cf3f9737a760482d185bb73566bcc9331Christoph Hellwig if (!sectors) { 588d6e0175cf3f9737a760482d185bb73566bcc9331Christoph Hellwig pr_err("WSNZ=1, WRITE_SAME w/sectors=0 not supported\n"); 589d6e0175cf3f9737a760482d185bb73566bcc9331Christoph Hellwig goto out_invalid_cdb_field; 590d6e0175cf3f9737a760482d185bb73566bcc9331Christoph Hellwig } 591d6e0175cf3f9737a760482d185bb73566bcc9331Christoph Hellwig 5921fd032ee10d2816c947f5d5b9abda95e728f0a8fChristoph Hellwig size = sbc_get_size(cmd, 1); 593d6e0175cf3f9737a760482d185bb73566bcc9331Christoph Hellwig cmd->t_task_lba = get_unaligned_be32(&cdb[2]); 594d6e0175cf3f9737a760482d185bb73566bcc9331Christoph Hellwig 595d6e0175cf3f9737a760482d185bb73566bcc9331Christoph Hellwig /* 596d6e0175cf3f9737a760482d185bb73566bcc9331Christoph Hellwig * Follow sbcr26 with WRITE_SAME (10) and check for the existence 597d6e0175cf3f9737a760482d185bb73566bcc9331Christoph Hellwig * of byte 1 bit 3 UNMAP instead of original reserved field 598d6e0175cf3f9737a760482d185bb73566bcc9331Christoph Hellwig */ 599d6e0175cf3f9737a760482d185bb73566bcc9331Christoph Hellwig if (sbc_write_same_supported(dev, &cdb[1]) < 0) 600d6e0175cf3f9737a760482d185bb73566bcc9331Christoph Hellwig goto out_unsupported_cdb; 6011fd032ee10d2816c947f5d5b9abda95e728f0a8fChristoph Hellwig cmd->execute_cmd = sbc_emulate_write_same; 602d6e0175cf3f9737a760482d185bb73566bcc9331Christoph Hellwig break; 603d6e0175cf3f9737a760482d185bb73566bcc9331Christoph Hellwig case VERIFY: 6041fd032ee10d2816c947f5d5b9abda95e728f0a8fChristoph Hellwig size = 0; 6051fd032ee10d2816c947f5d5b9abda95e728f0a8fChristoph Hellwig cmd->execute_cmd = sbc_emulate_verify; 606d6e0175cf3f9737a760482d185bb73566bcc9331Christoph Hellwig break; 607d6e0175cf3f9737a760482d185bb73566bcc9331Christoph Hellwig default: 6081fd032ee10d2816c947f5d5b9abda95e728f0a8fChristoph Hellwig ret = spc_parse_cdb(cmd, &size); 609d6e0175cf3f9737a760482d185bb73566bcc9331Christoph Hellwig if (ret) 610d6e0175cf3f9737a760482d185bb73566bcc9331Christoph Hellwig return ret; 611d6e0175cf3f9737a760482d185bb73566bcc9331Christoph Hellwig } 612d6e0175cf3f9737a760482d185bb73566bcc9331Christoph Hellwig 613d6e0175cf3f9737a760482d185bb73566bcc9331Christoph Hellwig /* reject any command that we don't have a handler for */ 614d6e0175cf3f9737a760482d185bb73566bcc9331Christoph Hellwig if (!(cmd->se_cmd_flags & SCF_SCSI_DATA_CDB) && !cmd->execute_cmd) 615d6e0175cf3f9737a760482d185bb73566bcc9331Christoph Hellwig goto out_unsupported_cdb; 616d6e0175cf3f9737a760482d185bb73566bcc9331Christoph Hellwig 617d6e0175cf3f9737a760482d185bb73566bcc9331Christoph Hellwig if (cmd->se_cmd_flags & SCF_SCSI_DATA_CDB) { 6181fd032ee10d2816c947f5d5b9abda95e728f0a8fChristoph Hellwig unsigned long long end_lba; 6191fd032ee10d2816c947f5d5b9abda95e728f0a8fChristoph Hellwig 620d6e0175cf3f9737a760482d185bb73566bcc9331Christoph Hellwig if (sectors > su_dev->se_dev_attrib.fabric_max_sectors) { 621d6e0175cf3f9737a760482d185bb73566bcc9331Christoph Hellwig printk_ratelimited(KERN_ERR "SCSI OP %02xh with too" 622d6e0175cf3f9737a760482d185bb73566bcc9331Christoph Hellwig " big sectors %u exceeds fabric_max_sectors:" 623d6e0175cf3f9737a760482d185bb73566bcc9331Christoph Hellwig " %u\n", cdb[0], sectors, 624d6e0175cf3f9737a760482d185bb73566bcc9331Christoph Hellwig su_dev->se_dev_attrib.fabric_max_sectors); 625d6e0175cf3f9737a760482d185bb73566bcc9331Christoph Hellwig goto out_invalid_cdb_field; 626d6e0175cf3f9737a760482d185bb73566bcc9331Christoph Hellwig } 627d6e0175cf3f9737a760482d185bb73566bcc9331Christoph Hellwig if (sectors > su_dev->se_dev_attrib.hw_max_sectors) { 628d6e0175cf3f9737a760482d185bb73566bcc9331Christoph Hellwig printk_ratelimited(KERN_ERR "SCSI OP %02xh with too" 629d6e0175cf3f9737a760482d185bb73566bcc9331Christoph Hellwig " big sectors %u exceeds backend hw_max_sectors:" 630d6e0175cf3f9737a760482d185bb73566bcc9331Christoph Hellwig " %u\n", cdb[0], sectors, 631d6e0175cf3f9737a760482d185bb73566bcc9331Christoph Hellwig su_dev->se_dev_attrib.hw_max_sectors); 632d6e0175cf3f9737a760482d185bb73566bcc9331Christoph Hellwig goto out_invalid_cdb_field; 633d6e0175cf3f9737a760482d185bb73566bcc9331Christoph Hellwig } 634d6e0175cf3f9737a760482d185bb73566bcc9331Christoph Hellwig 6351fd032ee10d2816c947f5d5b9abda95e728f0a8fChristoph Hellwig end_lba = dev->transport->get_blocks(dev) + 1; 6361fd032ee10d2816c947f5d5b9abda95e728f0a8fChristoph Hellwig if (cmd->t_task_lba + sectors > end_lba) { 6371fd032ee10d2816c947f5d5b9abda95e728f0a8fChristoph Hellwig pr_err("cmd exceeds last lba %llu " 6381fd032ee10d2816c947f5d5b9abda95e728f0a8fChristoph Hellwig "(lba %llu, sectors %u)\n", 6391fd032ee10d2816c947f5d5b9abda95e728f0a8fChristoph Hellwig end_lba, cmd->t_task_lba, sectors); 6401fd032ee10d2816c947f5d5b9abda95e728f0a8fChristoph Hellwig goto out_invalid_cdb_field; 6411fd032ee10d2816c947f5d5b9abda95e728f0a8fChristoph Hellwig } 6421fd032ee10d2816c947f5d5b9abda95e728f0a8fChristoph Hellwig 6431fd032ee10d2816c947f5d5b9abda95e728f0a8fChristoph Hellwig size = sbc_get_size(cmd, sectors); 644d6e0175cf3f9737a760482d185bb73566bcc9331Christoph Hellwig } 645d6e0175cf3f9737a760482d185bb73566bcc9331Christoph Hellwig 6461fd032ee10d2816c947f5d5b9abda95e728f0a8fChristoph Hellwig ret = target_cmd_size_check(cmd, size); 6471fd032ee10d2816c947f5d5b9abda95e728f0a8fChristoph Hellwig if (ret < 0) 6481fd032ee10d2816c947f5d5b9abda95e728f0a8fChristoph Hellwig return ret; 6491fd032ee10d2816c947f5d5b9abda95e728f0a8fChristoph Hellwig 650d6e0175cf3f9737a760482d185bb73566bcc9331Christoph Hellwig return 0; 651d6e0175cf3f9737a760482d185bb73566bcc9331Christoph Hellwig 652d6e0175cf3f9737a760482d185bb73566bcc9331Christoph Hellwigout_unsupported_cdb: 653d6e0175cf3f9737a760482d185bb73566bcc9331Christoph Hellwig cmd->se_cmd_flags |= SCF_SCSI_CDB_EXCEPTION; 654d6e0175cf3f9737a760482d185bb73566bcc9331Christoph Hellwig cmd->scsi_sense_reason = TCM_UNSUPPORTED_SCSI_OPCODE; 655d6e0175cf3f9737a760482d185bb73566bcc9331Christoph Hellwig return -EINVAL; 656d6e0175cf3f9737a760482d185bb73566bcc9331Christoph Hellwigout_invalid_cdb_field: 657d6e0175cf3f9737a760482d185bb73566bcc9331Christoph Hellwig cmd->se_cmd_flags |= SCF_SCSI_CDB_EXCEPTION; 658d6e0175cf3f9737a760482d185bb73566bcc9331Christoph Hellwig cmd->scsi_sense_reason = TCM_INVALID_CDB_FIELD; 659d6e0175cf3f9737a760482d185bb73566bcc9331Christoph Hellwig return -EINVAL; 660d6e0175cf3f9737a760482d185bb73566bcc9331Christoph Hellwig} 661d6e0175cf3f9737a760482d185bb73566bcc9331Christoph HellwigEXPORT_SYMBOL(sbc_parse_cdb); 662