diff options
| -rw-r--r-- | drivers/target/Makefile | 1 | ||||
| -rw-r--r-- | drivers/target/target_core_cdb.c | 1130 | ||||
| -rw-r--r-- | drivers/target/target_core_internal.h | 12 | ||||
| -rw-r--r-- | drivers/target/target_core_pscsi.c | 465 | ||||
| -rw-r--r-- | drivers/target/target_core_sbc.c | 239 | ||||
| -rw-r--r-- | drivers/target/target_core_spc.c | 916 | ||||
| -rw-r--r-- | drivers/target/target_core_transport.c | 47 | ||||
| -rw-r--r-- | include/target/target_core_backend.h | 6 |
8 files changed, 1155 insertions, 1661 deletions
diff --git a/drivers/target/Makefile b/drivers/target/Makefile index 50b887b349c0..9fdcb561422f 100644 --- a/drivers/target/Makefile +++ b/drivers/target/Makefile @@ -9,7 +9,6 @@ target_core_mod-y := target_core_configfs.o \ target_core_tmr.o \ target_core_tpg.o \ target_core_transport.o \ - target_core_cdb.o \ target_core_sbc.o \ target_core_spc.o \ target_core_ua.o \ diff --git a/drivers/target/target_core_cdb.c b/drivers/target/target_core_cdb.c deleted file mode 100644 index 664f6e775d0e..000000000000 --- a/drivers/target/target_core_cdb.c +++ /dev/null @@ -1,1130 +0,0 @@ -/* - * CDB emulation for non-READ/WRITE commands. - * - * Copyright (c) 2002, 2003, 2004, 2005 PyX Technologies, Inc. - * Copyright (c) 2005, 2006, 2007 SBE, Inc. - * Copyright (c) 2007-2010 Rising Tide Systems - * Copyright (c) 2008-2010 Linux-iSCSI.org - * - * Nicholas A. Bellinger <nab@kernel.org> - * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU General Public License as published by - * the Free Software Foundation; either version 2 of the License, or - * (at your option) any later version. - * - * This program is distributed in the hope that it will be useful, - * but WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the - * GNU General Public License for more details. - * - * You should have received a copy of the GNU General Public License - * along with this program; if not, write to the Free Software - * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. - */ - -#include <linux/kernel.h> -#include <linux/module.h> -#include <asm/unaligned.h> -#include <scsi/scsi.h> - -#include <target/target_core_base.h> -#include <target/target_core_backend.h> -#include <target/target_core_fabric.h> - -#include "target_core_internal.h" -#include "target_core_ua.h" - -static void -target_fill_alua_data(struct se_port *port, unsigned char *buf) -{ - struct t10_alua_tg_pt_gp *tg_pt_gp; - struct t10_alua_tg_pt_gp_member *tg_pt_gp_mem; - - /* - * Set SCCS for MAINTENANCE_IN + REPORT_TARGET_PORT_GROUPS. - */ - buf[5] = 0x80; - - /* - * Set TPGS field for explict and/or implict ALUA access type - * and opteration. - * - * See spc4r17 section 6.4.2 Table 135 - */ - if (!port) - return; - tg_pt_gp_mem = port->sep_alua_tg_pt_gp_mem; - if (!tg_pt_gp_mem) - return; - - spin_lock(&tg_pt_gp_mem->tg_pt_gp_mem_lock); - tg_pt_gp = tg_pt_gp_mem->tg_pt_gp; - if (tg_pt_gp) - buf[5] |= tg_pt_gp->tg_pt_gp_alua_access_type; - spin_unlock(&tg_pt_gp_mem->tg_pt_gp_mem_lock); -} - -static int -target_emulate_inquiry_std(struct se_cmd *cmd, char *buf) -{ - struct se_lun *lun = cmd->se_lun; - struct se_device *dev = cmd->se_dev; - - /* Set RMB (removable media) for tape devices */ - if (dev->transport->get_device_type(dev) == TYPE_TAPE) - buf[1] = 0x80; - - buf[2] = dev->transport->get_device_rev(dev); - - /* - * NORMACA and HISUP = 0, RESPONSE DATA FORMAT = 2 - * - * SPC4 says: - * A RESPONSE DATA FORMAT field set to 2h indicates that the - * standard INQUIRY data is in the format defined in this - * standard. Response data format values less than 2h are - * obsolete. Response data format values greater than 2h are - * reserved. - */ - buf[3] = 2; - - /* - * Enable SCCS and TPGS fields for Emulated ALUA - */ - if (dev->se_sub_dev->t10_alua.alua_type == SPC3_ALUA_EMULATED) - target_fill_alua_data(lun->lun_sep, buf); - - buf[7] = 0x2; /* CmdQue=1 */ - - snprintf(&buf[8], 8, "LIO-ORG"); - snprintf(&buf[16], 16, "%s", dev->se_sub_dev->t10_wwn.model); - snprintf(&buf[32], 4, "%s", dev->se_sub_dev->t10_wwn.revision); - buf[4] = 31; /* Set additional length to 31 */ - - return 0; -} - -/* unit serial number */ -static int -target_emulate_evpd_80(struct se_cmd *cmd, unsigned char *buf) -{ - struct se_device *dev = cmd->se_dev; - u16 len = 0; - - if (dev->se_sub_dev->su_dev_flags & - SDF_EMULATED_VPD_UNIT_SERIAL) { - u32 unit_serial_len; - - unit_serial_len = strlen(dev->se_sub_dev->t10_wwn.unit_serial); - unit_serial_len++; /* For NULL Terminator */ - - len += sprintf(&buf[4], "%s", - dev->se_sub_dev->t10_wwn.unit_serial); - len++; /* Extra Byte for NULL Terminator */ - buf[3] = len; - } - return 0; -} - -static void -target_parse_naa_6h_vendor_specific(struct se_device *dev, unsigned char *buf) -{ - unsigned char *p = &dev->se_sub_dev->t10_wwn.unit_serial[0]; - int cnt; - bool next = true; - - /* - * Generate up to 36 bits of VENDOR SPECIFIC IDENTIFIER starting on - * byte 3 bit 3-0 for NAA IEEE Registered Extended DESIGNATOR field - * format, followed by 64 bits of VENDOR SPECIFIC IDENTIFIER EXTENSION - * to complete the payload. These are based from VPD=0x80 PRODUCT SERIAL - * NUMBER set via vpd_unit_serial in target_core_configfs.c to ensure - * per device uniqeness. - */ - for (cnt = 0; *p && cnt < 13; p++) { - int val = hex_to_bin(*p); - - if (val < 0) - continue; - - if (next) { - next = false; - buf[cnt++] |= val; - } else { - next = true; - buf[cnt] = val << 4; - } - } -} - -/* - * Device identification VPD, for a complete list of - * DESIGNATOR TYPEs see spc4r17 Table 459. - */ -static int -target_emulate_evpd_83(struct se_cmd *cmd, unsigned char *buf) -{ - struct se_device *dev = cmd->se_dev; - struct se_lun *lun = cmd->se_lun; - struct se_port *port = NULL; - struct se_portal_group *tpg = NULL; - struct t10_alua_lu_gp_member *lu_gp_mem; - struct t10_alua_tg_pt_gp *tg_pt_gp; - struct t10_alua_tg_pt_gp_member *tg_pt_gp_mem; - unsigned char *prod = &dev->se_sub_dev->t10_wwn.model[0]; - u32 prod_len; - u32 unit_serial_len, off = 0; - u16 len = 0, id_len; - - off = 4; - - /* - * NAA IEEE Registered Extended Assigned designator format, see - * spc4r17 section 7.7.3.6.5 - * - * We depend upon a target_core_mod/ConfigFS provided - * /sys/kernel/config/target/core/$HBA/$DEV/wwn/vpd_unit_serial - * value in order to return the NAA id. - */ - if (!(dev->se_sub_dev->su_dev_flags & SDF_EMULATED_VPD_UNIT_SERIAL)) - goto check_t10_vend_desc; - - /* CODE SET == Binary */ - buf[off++] = 0x1; - - /* Set ASSOCIATION == addressed logical unit: 0)b */ - buf[off] = 0x00; - - /* Identifier/Designator type == NAA identifier */ - buf[off++] |= 0x3; - off++; - - /* Identifier/Designator length */ - buf[off++] = 0x10; - - /* - * Start NAA IEEE Registered Extended Identifier/Designator - */ - buf[off++] = (0x6 << 4); - - /* - * Use OpenFabrics IEEE Company ID: 00 14 05 - */ - buf[off++] = 0x01; - buf[off++] = 0x40; - buf[off] = (0x5 << 4); - - /* - * Return ConfigFS Unit Serial Number information for - * VENDOR_SPECIFIC_IDENTIFIER and - * VENDOR_SPECIFIC_IDENTIFIER_EXTENTION - */ - target_parse_naa_6h_vendor_specific(dev, &buf[off]); - - len = 20; - off = (len + 4); - -check_t10_vend_desc: - /* - * T10 Vendor Identifier Page, see spc4r17 section 7.7.3.4 - */ - id_len = 8; /* For Vendor field */ - prod_len = 4; /* For VPD Header */ - prod_len += 8; /* For Vendor field */ - prod_len += strlen(prod); - prod_len++; /* For : */ - - if (dev->se_sub_dev->su_dev_flags & - SDF_EMULATED_VPD_UNIT_SERIAL) { - unit_serial_len = - strlen(&dev->se_sub_dev->t10_wwn.unit_serial[0]); - unit_serial_len++; /* For NULL Terminator */ - - id_len += sprintf(&buf[off+12], "%s:%s", prod, - &dev->se_sub_dev->t10_wwn.unit_serial[0]); - } - buf[off] = 0x2; /* ASCII */ - buf[off+1] = 0x1; /* T10 Vendor ID */ - buf[off+2] = 0x0; - memcpy(&buf[off+4], "LIO-ORG", 8); - /* Extra Byte for NULL Terminator */ - id_len++; - /* Identifier Length */ - buf[off+3] = id_len; - /* Header size for Designation descriptor */ - len += (id_len + 4); - off += (id_len + 4); - /* - * struct se_port is only set for INQUIRY VPD=1 through $FABRIC_MOD - */ - port = lun->lun_sep; - if (port) { - struct t10_alua_lu_gp *lu_gp; - u32 padding, scsi_name_len; - u16 lu_gp_id = 0; - u16 tg_pt_gp_id = 0; - u16 tpgt; - - tpg = port->sep_tpg; - /* - * Relative target port identifer, see spc4r17 - * section 7.7.3.7 - * - * Get the PROTOCOL IDENTIFIER as defined by spc4r17 - * section 7.5.1 Table 362 - */ - buf[off] = - (tpg->se_tpg_tfo->get_fabric_proto_ident(tpg) << 4); - buf[off++] |= 0x1; /* CODE SET == Binary */ - buf[off] = 0x80; /* Set PIV=1 */ - /* Set ASSOCIATION == target port: 01b */ - buf[off] |= 0x10; - /* DESIGNATOR TYPE == Relative target port identifer */ - buf[off++] |= 0x4; - off++; /* Skip over Reserved */ - buf[off++] = 4; /* DESIGNATOR LENGTH */ - /* Skip over Obsolete field in RTPI payload - * in Table 472 */ - off += 2; - buf[off++] = ((port->sep_rtpi >> 8) & 0xff); - buf[off++] = (port->sep_rtpi & 0xff); - len += 8; /* Header size + Designation descriptor */ - /* - * Target port group identifier, see spc4r17 - * section 7.7.3.8 - * - * Get the PROTOCOL IDENTIFIER as defined by spc4r17 - * section 7.5.1 Table 362 - */ - if (dev->se_sub_dev->t10_alua.alua_type != - SPC3_ALUA_EMULATED) - goto check_scsi_name; - - tg_pt_gp_mem = port->sep_alua_tg_pt_gp_mem; - if (!tg_pt_gp_mem) - goto check_lu_gp; - - spin_lock(&tg_pt_gp_mem->tg_pt_gp_mem_lock); - tg_pt_gp = tg_pt_gp_mem->tg_pt_gp; - if (!tg_pt_gp) { - spin_unlock(&tg_pt_gp_mem->tg_pt_gp_mem_lock); - goto check_lu_gp; - } - tg_pt_gp_id = tg_pt_gp->tg_pt_gp_id; - spin_unlock(&tg_pt_gp_mem->tg_pt_gp_mem_lock); - - buf[off] = - (tpg->se_tpg_tfo->get_fabric_proto_ident(tpg) << 4); - buf[off++] |= 0x1; /* CODE SET == Binary */ - buf[off] = 0x80; /* Set PIV=1 */ - /* Set ASSOCIATION == target port: 01b */ - buf[off] |= 0x10; - /* DESIGNATOR TYPE == Target port group identifier */ - buf[off++] |= 0x5; - off++; /* Skip over Reserved */ - buf[off++] = 4; /* DESIGNATOR LENGTH */ - off += 2; /* Skip over Reserved Field */ - buf[off++] = ((tg_pt_gp_id >> 8) & 0xff); - buf[off++] = (tg_pt_gp_id & 0xff); - len += 8; /* Header size + Designation descriptor */ - /* - * Logical Unit Group identifier, see spc4r17 - * section 7.7.3.8 - */ -check_lu_gp: - lu_gp_mem = dev->dev_alua_lu_gp_mem; - if (!lu_gp_mem) - goto check_scsi_name; - - spin_lock(&lu_gp_mem->lu_gp_mem_lock); - lu_gp = lu_gp_mem->lu_gp; - if (!lu_gp) { - spin_unlock(&lu_gp_mem->lu_gp_mem_lock); - goto check_scsi_name; - } - lu_gp_id = lu_gp->lu_gp_id; - spin_unlock(&lu_gp_mem->lu_gp_mem_lock); - - buf[off++] |= 0x1; /* CODE SET == Binary */ - /* DESIGNATOR TYPE == Logical Unit Group identifier */ - buf[off++] |= 0x6; - off++; /* Skip over Reserved */ - buf[off++] = 4; /* DESIGNATOR LENGTH */ - off += 2; /* Skip over Reserved Field */ - buf[off++] = ((lu_gp_id >> 8) & 0xff); - buf[off++] = (lu_gp_id & 0xff); - len += 8; /* Header size + Designation descriptor */ - /* - * SCSI name string designator, see spc4r17 - * section 7.7.3.11 - * - * Get the PROTOCOL IDENTIFIER as defined by spc4r17 - * section 7.5.1 Table 362 - */ -check_scsi_name: - scsi_name_len = strlen(tpg->se_tpg_tfo->tpg_get_wwn(tpg)); - /* UTF-8 ",t,0x<16-bit TPGT>" + NULL Terminator */ - scsi_name_len += 10; - /* Check for 4-byte padding */ - padding = ((-scsi_name_len) & 3); - if (padding != 0) - scsi_name_len += padding; - /* Header size + Designation descriptor */ - scsi_name_len += 4; - - buf[off] = - (tpg->se_tpg_tfo->get_fabric_proto_ident(tpg) << 4); - buf[off++] |= 0x3; /* CODE SET == UTF-8 */ - buf[off] = 0x80; /* Set PIV=1 */ - /* Set ASSOCIATION == target port: 01b */ - buf[off] |= 0x10; - /* DESIGNATOR TYPE == SCSI name string */ - buf[off++] |= 0x8; - off += 2; /* Skip over Reserved and length */ - /* - * SCSI name string identifer containing, $FABRIC_MOD - * dependent information. For LIO-Target and iSCSI - * Target Port, this means "<iSCSI name>,t,0x<TPGT> in - * UTF-8 encoding. - */ - tpgt = tpg->se_tpg_tfo->tpg_get_tag(tpg); - scsi_name_len = sprintf(&buf[off], "%s,t,0x%04x", - tpg->se_tpg_tfo->tpg_get_wwn(tpg), tpgt); - scsi_name_len += 1 /* Include NULL terminator */; - /* - * The null-terminated, null-padded (see 4.4.2) SCSI - * NAME STRING field contains a UTF-8 format string. - * The number of bytes in the SCSI NAME STRING field - * (i.e., the value in the DESIGNATOR LENGTH field) - * shall be no larger than 256 and shall be a multiple - * of four. - */ - if (padding) - scsi_name_len += padding; - - buf[off-1] = scsi_name_len; - off += scsi_name_len; - /* Header size + Designation descriptor */ - len += (scsi_name_len + 4); - } - buf[2] = ((len >> 8) & 0xff); - buf[3] = (len & 0xff); /* Page Length for VPD 0x83 */ - return 0; -} - -/* Extended INQUIRY Data VPD Page */ -static int -target_emulate_evpd_86(struct se_cmd *cmd, unsigned char *buf) -{ - buf[3] = 0x3c; - /* Set HEADSUP, ORDSUP, SIMPSUP */ - buf[5] = 0x07; - - /* If WriteCache emulation is enabled, set V_SUP */ - if (cmd->se_dev->se_sub_dev->se_dev_attrib.emulate_write_cache > 0) - buf[6] = 0x01; - return 0; -} - -/* Block Limits VPD page */ -static int -target_emulate_evpd_b0(struct se_cmd *cmd, unsigned char *buf) -{ - struct se_device *dev = cmd->se_dev; - u32 max_sectors; - int have_tp = 0; - - /* - * Following sbc3r22 section 6.5.3 Block Limits VPD page, when - * emulate_tpu=1 or emulate_tpws=1 we will be expect a - * different page length for Thin Provisioning. - */ - if (dev->se_sub_dev->se_dev_attrib.emulate_tpu || dev->se_sub_dev->se_dev_attrib.emulate_tpws) - have_tp = 1; - - buf[0] = dev->transport->get_device_type(dev); - buf[3] = have_tp ? 0x3c : 0x10; - - /* Set WSNZ to 1 */ - buf[4] = 0x01; - - /* - * Set OPTIMAL TRANSFER LENGTH GRANULARITY - */ - put_unaligned_be16(1, &buf[6]); - - /* - * Set MAXIMUM TRANSFER LENGTH - */ - max_sectors = min(dev->se_sub_dev->se_dev_attrib.fabric_max_sectors, - dev->se_sub_dev->se_dev_attrib.hw_max_sectors); - put_unaligned_be32(max_sectors, &buf[8]); - - /* - * Set OPTIMAL TRANSFER LENGTH - */ - put_unaligned_be32(dev->se_sub_dev->se_dev_attrib.optimal_sectors, &buf[12]); - - /* - * Exit now if we don't support TP. - */ - if (!have_tp) - return 0; - - /* - * Set MAXIMUM UNMAP LBA COUNT - */ - put_unaligned_be32(dev->se_sub_dev->se_dev_attrib.max_unmap_lba_count, &buf[20]); - - /* - * Set MAXIMUM UNMAP BLOCK DESCRIPTOR COUNT - */ - put_unaligned_be32(dev->se_sub_dev->se_dev_attrib.max_unmap_block_desc_count, - &buf[24]); - - /* - * Set OPTIMAL UNMAP GRANULARITY - */ - put_unaligned_be32(dev->se_sub_dev->se_dev_attrib.unmap_granularity, &buf[28]); - - /* - * UNMAP GRANULARITY ALIGNMENT - */ - put_unaligned_be32(dev->se_sub_dev->se_dev_attrib.unmap_granularity_alignment, - &buf[32]); - if (dev->se_sub_dev->se_dev_attrib.unmap_granularity_alignment != 0) - buf[32] |= 0x80; /* Set the UGAVALID bit */ - - return 0; -} - -/* Block Device Characteristics VPD page */ -static int -target_emulate_evpd_b1(struct se_cmd *cmd, unsigned char *buf) -{ - struct se_device *dev = cmd->se_dev; - - buf[0] = dev->transport->get_device_type(dev); - buf[3] = 0x3c; - buf[5] = dev->se_sub_dev->se_dev_attrib.is_nonrot ? 1 : 0; - - return 0; -} - -/* Thin Provisioning VPD */ -static int -target_emulate_evpd_b2(struct se_cmd *cmd, unsigned char *buf) -{ - struct se_device *dev = cmd->se_dev; - - /* - * From sbc3r22 section 6.5.4 Thin Provisioning VPD page: - * - * The PAGE LENGTH field is defined in SPC-4. If the DP bit is set to - * zero, then the page length shall be set to 0004h. If the DP bit - * is set to one, then the page length shall be set to the value - * defined in table 162. - */ - buf[0] = dev->transport->get_device_type(dev); - - /* - * Set Hardcoded length mentioned above for DP=0 - */ - put_unaligned_be16(0x0004, &buf[2]); - - /* - * The THRESHOLD EXPONENT field indicates the threshold set size in - * LBAs as a power of 2 (i.e., the threshold set size is equal to - * 2(threshold exponent)). - * - * Note that this is currently set to 0x00 as mkp says it will be - * changing again. We can enable this once it has settled in T10 - * and is actually used by Linux/SCSI ML code. - */ - buf[4] = 0x00; - - /* - * A TPU bit set to one indicates that the device server supports - * the UNMAP command (see 5.25). A TPU bit set to zero indicates - * that the device server does not support the UNMAP command. - */ - if (dev->se_sub_dev->se_dev_attrib.emulate_tpu != 0) - buf[5] = 0x80; - - /* - * A TPWS bit set to one indicates that the device server supports - * the use of the WRITE SAME (16) command (see 5.42) to unmap LBAs. - * A TPWS bit set to zero indicates that the device server does not - * support the use of the WRITE SAME (16) command to unmap LBAs. - */ - if (dev->se_sub_dev->se_dev_attrib.emulate_tpws != 0) - buf[5] |= 0x40; - - return 0; -} - -static int -target_emulate_evpd_00(struct se_cmd *cmd, unsigned char *buf); - -static struct { - uint8_t page; - int (*emulate)(struct se_cmd *, unsigned char *); -} evpd_handlers[] = { - { .page = 0x00, .emulate = target_emulate_evpd_00 }, - { .page = 0x80, .emulate = target_emulate_evpd_80 }, - { .page = 0x83, .emulate = target_emulate_evpd_83 }, - { .page = 0x86, .emulate = target_emulate_evpd_86 }, - { .page = 0xb0, .emulate = target_emulate_evpd_b0 }, - { .page = 0xb1, .emulate = target_emulate_evpd_b1 }, - { .page = 0xb2, .emulate = target_emulate_evpd_b2 }, -}; - -/* supported vital product data pages */ -static int -target_emulate_evpd_00(struct se_cmd *cmd, unsigned char *buf) -{ - int p; - - /* - * Only report the INQUIRY EVPD=1 pages after a valid NAA - * Registered Extended LUN WWN has been set via ConfigFS - * during device creation/restart. - */ - if (cmd->se_dev->se_sub_dev->su_dev_flags & - SDF_EMULATED_VPD_UNIT_SERIAL) { - buf[3] = ARRAY_SIZE(evpd_handlers); - for (p = 0; p < ARRAY_SIZE(evpd_handlers); ++p) - buf[p + 4] = evpd_handlers[p].page; - } - - return 0; -} - -int target_emulate_inquiry(struct se_cmd *cmd) -{ - struct se_device *dev = cmd->se_dev; - struct se_portal_group *tpg = cmd->se_lun->lun_sep->sep_tpg; - unsigned char *buf, *map_buf; - unsigned char *cdb = cmd->t_task_cdb; - int p, ret; - - map_buf = transport_kmap_data_sg(cmd); - /* - * If SCF_PASSTHROUGH_SG_TO_MEM_NOALLOC is not set, then we - * know we actually allocated a full page. Otherwise, if the - * data buffer is too small, allocate a temporary buffer so we - * don't have to worry about overruns in all our INQUIRY - * emulation handling. - */ - if (cmd->data_length < SE_INQUIRY_BUF && - (cmd->se_cmd_flags & SCF_PASSTHROUGH_SG_TO_MEM_NOALLOC)) { - buf = kzalloc(SE_INQUIRY_BUF, GFP_KERNEL); - if (!buf) { - transport_kunmap_data_sg(cmd); - cmd->scsi_sense_reason = TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; - return -ENOMEM; - } - } else { - buf = map_buf; - } - - if (dev == tpg->tpg_virt_lun0.lun_se_dev) - buf[0] = 0x3f; /* Not connected */ - else - buf[0] = dev->transport->get_device_type(dev); - - if (!(cdb[1] & 0x1)) { - if (cdb[2]) { - pr_err("INQUIRY with EVPD==0 but PAGE CODE=%02x\n", - cdb[2]); - cmd->scsi_sense_reason = TCM_INVALID_CDB_FIELD; - ret = -EINVAL; - goto out; - } - - ret = target_emulate_inquiry_std(cmd, buf); - goto out; - } - - for (p = 0; p < ARRAY_SIZE(evpd_handlers); ++p) { - if (cdb[2] == evpd_handlers[p].page) { - buf[1] = cdb[2]; - ret = evpd_handlers[p].emulate(cmd, buf); - goto out; - } - } - - pr_err("Unknown VPD Code: 0x%02x\n", cdb[2]); - cmd->scsi_sense_reason = TCM_INVALID_CDB_FIELD; - ret = -EINVAL; - -out: - if (buf != map_buf) { - memcpy(map_buf, buf, cmd->data_length); - kfree(buf); - } - transport_kunmap_data_sg(cmd); - - if (!ret) - target_complete_cmd(cmd, GOOD); - return ret; -} - -int target_emulate_readcapacity(struct se_cmd *cmd) -{ - struct se_device *dev = cmd->se_dev; - unsigned char *buf; - unsigned long long blocks_long = dev->transport->get_blocks(dev); - u32 blocks; - - if (blocks_long >= 0x00000000ffffffff) - blocks = 0xffffffff; - else - blocks = (u32)blocks_long; - - buf = transport_kmap_data_sg(cmd); - - buf[0] = (blocks >> 24) & 0xff; - buf[1] = (blocks >> 16) & 0xff; - buf[2] = (blocks >> 8) & 0xff; - buf[3] = blocks & 0xff; - buf[4] = (dev->se_sub_dev->se_dev_attrib.block_size >> 24) & 0xff; - buf[5] = (dev->se_sub_dev->se_dev_attrib.block_size >> 16) & 0xff; - buf[6] = (dev->se_sub_dev->se_dev_attrib.block_size >> 8) & 0xff; - buf[7] = dev->se_sub_dev->se_dev_attrib.block_size & 0xff; - - transport_kunmap_data_sg(cmd); - - target_complete_cmd(cmd, GOOD); - return 0; -} - -int target_emulate_readcapacity_16(struct se_cmd *cmd) -{ - struct se_device *dev = cmd->se_dev; - unsigned char *buf; - unsigned long long blocks = dev->transport->get_blocks(dev); - - buf = transport_kmap_data_sg(cmd); - - buf[0] = (blocks >> 56) & 0xff; - buf[1] = (blocks >> 48) & 0xff; - buf[2] = (blocks >> 40) & 0xff; - buf[3] = (blocks >> 32) & 0xff; - buf[4] = (blocks >> 24) & 0xff; - buf[5] = (blocks >> 16) & 0xff; - buf[6] = (blocks >> 8) & 0xff; - buf[7] = blocks & 0xff; - buf[8] = (dev->se_sub_dev->se_dev_attrib.block_size >> 24) & 0xff; - buf[9] = (dev->se_sub_dev->se_dev_attrib.block_size >> 16) & 0xff; - buf[10] = (dev->se_sub_dev->se_dev_attrib.block_size >> 8) & 0xff; - buf[11] = dev->se_sub_dev->se_dev_attrib.block_size & 0xff; - /* - * Set Thin Provisioning Enable bit following sbc3r22 in section - * READ CAPACITY (16) byte 14 if emulate_tpu or emulate_tpws is enabled. - */ - if (dev->se_sub_dev->se_dev_attrib.emulate_tpu || dev->se_sub_dev->se_dev_attrib.emulate_tpws) - buf[14] = 0x80; - - transport_kunmap_data_sg(cmd); - - target_complete_cmd(cmd, GOOD); - return 0; -} - -static int -target_modesense_rwrecovery(unsigned char *p) -{ - p[0] = 0x01; - p[1] = 0x0a; - - return 12; -} - -static int -target_modesense_control(struct se_device *dev, unsigned char *p) -{ - p[0] = 0x0a; - p[1] = 0x0a; - p[2] = 2; - /* - * From spc4r23, 7.4.7 Control mode page - * - * The QUEUE ALGORITHM MODIFIER field (see table 368) specifies - * restrictions on the algorithm used for reordering commands - * having the SIMPLE task attribute (see SAM-4). - * - * Table 368 -- QUEUE ALGORITHM MODIFIER field - * Code Description - * 0h Restricted reordering - * 1h Unrestricted reordering allowed - * 2h to 7h Reserved - * 8h to Fh Vendor specific - * - * A value of zero in the QUEUE ALGORITHM MODIFIER field specifies that - * the device server shall order the processing sequence of commands - * having the SIMPLE task attribute such that data integrity is maintained - * for that I_T nexus (i.e., if the transmission of new SCSI transport protocol - * requests is halted at any time, the final value of all data observable - * on the medium shall be the same as if all the commands had been processed - * with the ORDERED task attribute). - * - * A value of one in the QUEUE ALGORITHM MODIFIER field specifies that the - * device server may reorder the processing sequence of commands having the - * SIMPLE task attribute in any manner. Any data integrity exposures related to - * command sequence order shall be explicitly handled by the application client - * through the selection of appropriate ommands and task attributes. - */ - p[3] = (dev->se_sub_dev->se_dev_attrib.emulate_rest_reord == 1) ? 0x00 : 0x10; - /* - * From spc4r17, section 7.4.6 Control mode Page - * - * Unit Attention interlocks control (UN_INTLCK_CTRL) to code 00b - * - * 00b: The logical unit shall clear any unit attention condition - * reported in the same I_T_L_Q nexus transaction as a CHECK CONDITION - * status and shall not establish a unit attention condition when a com- - * mand is completed with BUSY, TASK SET FULL, or RESERVATION CONFLICT - * status. - * - * 10b: The logical unit shall not clear any unit attention condition - * reported in the same I_T_L_Q nexus transaction as a CHECK CONDITION - * status and shall not establish a unit attention condition when - * a command is completed with BUSY, TASK SET FULL, or RESERVATION - * CONFLICT status. - * - * 11b a The logical unit shall not clear any unit attention condition - * reported in the same I_T_L_Q nexus transaction as a CHECK CONDITION - * status and shall establish a unit attention condition for the - * initiator port associated with the I_T nexus on which the BUSY, - * TASK SET FULL, or RESERVATION CONFLICT status is being returned. - * Depending on the status, the additional sense code shall be set to - * PREVIOUS BUSY STATUS, PREVIOUS TASK SET FULL STATUS, or PREVIOUS - * RESERVATION CONFLICT STATUS. Until it is cleared by a REQUEST SENSE - * command, a unit attention condition shall be established only once - * for a BUSY, TASK SET FULL, or RESERVATION CONFLICT status regardless - * to the number of commands completed with one of those status codes. - */ - p[4] = (dev->se_sub_dev->se_dev_attrib.emulate_ua_intlck_ctrl == 2) ? 0x30 : - (dev->se_sub_dev->se_dev_attrib.emulate_ua_intlck_ctrl == 1) ? 0x20 : 0x00; - /* - * From spc4r17, section 7.4.6 Control mode Page - * - * Task Aborted Status (TAS) bit set to zero. - * - * A task aborted status (TAS) bit set to zero specifies that aborted - * tasks shall be terminated by the device server without any response - * to the application client. A TAS bit set to one specifies that tasks - * aborted by the actions of an I_T nexus other than the I_T nexus on - * which the command was received shall be completed with TASK ABORTED - * status (see SAM-4). - */ - p[5] = (dev->se_sub_dev->se_dev_attrib.emulate_tas) ? 0x40 : 0x00; - p[8] = 0xff; - p[9] = 0xff; - p[11] = 30; - - return 12; -} - -static int -target_modesense_caching(struct se_device *dev, unsigned char *p) -{ - p[0] = 0x08; - p[1] = 0x12; - if (dev->se_sub_dev->se_dev_attrib.emulate_write_cache > 0) - p[2] = 0x04; /* Write Cache Enable */ - p[12] = 0x20; /* Disabled Read Ahead */ - - return 20; -} - -static void -target_modesense_write_protect(unsigned char *buf, int type) -{ - /* - * I believe that the WP bit (bit 7) in the mode header is the same for - * all device types.. - */ - switch (type) { - case TYPE_DISK: - case TYPE_TAPE: - default: - buf[0] |= 0x80; /* WP bit */ - break; - } -} - -static void -target_modesense_dpofua(unsigned char *buf, int type) -{ - switch (type) { - case TYPE_DISK: - buf[0] |= 0x10; /* DPOFUA bit */ - break; - default: - break; - } -} - -int target_emulate_modesense(struct se_cmd *cmd) -{ - struct se_device *dev = cmd->se_dev; - char *cdb = cmd->t_task_cdb; - unsigned char *rbuf; - int type = dev->transport->get_device_type(dev); - int ten = (cmd->t_task_cdb[0] == MODE_SENSE_10); - int offset = ten ? 8 : 4; - int length = 0; - unsigned char buf[SE_MODE_PAGE_BUF]; - - memset(buf, 0, SE_MODE_PAGE_BUF); - - switch (cdb[2] & 0x3f) { - case 0x01: - length = target_modesense_rwrecovery(&buf[offset]); - break; - case 0x08: - length = target_modesense_caching(dev, &buf[offset]); - break; - case 0x0a: - length = target_modesense_control(dev, &buf[offset]); - break; - case 0x3f: - length = target_modesense_rwrecovery(&buf[offset]); - length += target_modesense_caching(dev, &buf[offset+length]); - length += target_modesense_control(dev, &buf[offset+length]); - break; - default: - pr_err("MODE SENSE: unimplemented page/subpage: 0x%02x/0x%02x\n", - cdb[2] & 0x3f, cdb[3]); - cmd->scsi_sense_reason = TCM_UNKNOWN_MODE_PAGE; - return -EINVAL; - } - offset += length; - - if (ten) { - offset -= 2; - buf[0] = (offset >> 8) & 0xff; - buf[1] = offset & 0xff; - - if ((cmd->se_lun->lun_access & TRANSPORT_LUNFLAGS_READ_ONLY) || - (cmd->se_deve && - (cmd->se_deve->lun_flags & TRANSPORT_LUNFLAGS_READ_ONLY))) - target_modesense_write_protect(&buf[3], type); - - if ((dev->se_sub_dev->se_dev_attrib.emulate_write_cache > 0) && - (dev->se_sub_dev->se_dev_attrib.emulate_fua_write > 0)) - target_modesense_dpofua(&buf[3], type); - - if ((offset + 2) > cmd->data_length) - offset = cmd->data_length; - - } else { - offset -= 1; - buf[0] = offset & 0xff; - - if ((cmd->se_lun->lun_access & TRANSPORT_LUNFLAGS_READ_ONLY) || - (cmd->se_deve && - (cmd->se_deve->lun_flags & TRANSPORT_LUNFLAGS_READ_ONLY))) - target_modesense_write_protect(&buf[2], type); - - if ((dev->se_sub_dev->se_dev_attrib.emulate_write_cache > 0) && - (dev->se_sub_dev->se_dev_attrib.emulate_fua_write > 0)) - target_modesense_dpofua(&buf[2], type); - - if ((offset + 1) > cmd->data_length) - offset = cmd->data_length; - } - - rbuf = transport_kmap_data_sg(cmd); - memcpy(rbuf, buf, offset); - transport_kunmap_data_sg(cmd); - - target_complete_cmd(cmd, GOOD); - return 0; -} - -int target_emulate_request_sense(struct se_cmd *cmd) -{ - unsigned char *cdb = cmd->t_task_cdb; - unsigned char *buf; - u8 ua_asc = 0, ua_ascq = 0; - int err = 0; - - if (cdb[1] & 0x01) { - pr_err("REQUEST_SENSE description emulation not" - " supported\n"); - cmd->scsi_sense_reason = TCM_INVALID_CDB_FIELD; - return -ENOSYS; - } - - buf = transport_kmap_data_sg(cmd); - - if (!core_scsi3_ua_clear_for_request_sense(cmd, &ua_asc, &ua_ascq)) { - /* - * CURRENT ERROR, UNIT ATTENTION - */ - buf[0] = 0x70; - buf[SPC_SENSE_KEY_OFFSET] = UNIT_ATTENTION; - - if (cmd->data_length < 18) { - buf[7] = 0x00; - err = -EINVAL; - goto end; - } - /* - * The Additional Sense Code (ASC) from the UNIT ATTENTION - */ - buf[SPC_ASC_KEY_OFFSET] = ua_asc; - buf[SPC_ASCQ_KEY_OFFSET] = ua_ascq; - buf[7] = 0x0A; - } else { - /* - * CURRENT ERROR, NO SENSE - */ - buf[0] = 0x70; - buf[SPC_SENSE_KEY_OFFSET] = NO_SENSE; - - if (cmd->data_length < 18) { - buf[7] = 0x00; - err = -EINVAL; - goto end; - } - /* - * NO ADDITIONAL SENSE INFORMATION - */ - buf[SPC_ASC_KEY_OFFSET] = 0x00; - buf[7] = 0x0A; - } - -end: - transport_kunmap_data_sg(cmd); - target_complete_cmd(cmd, GOOD); - return 0; -} - -/* - * Used for TCM/IBLOCK and TCM/FILEIO for block/blk-lib.c level discard support. - * Note this is not used for TCM/pSCSI passthrough - */ -int target_emulate_unmap(struct se_cmd *cmd) -{ - struct se_device *dev = cmd->se_dev; - unsigned char *buf, *ptr = NULL; - unsigned char *cdb = &cmd->t_task_cdb[0]; - sector_t lba; - unsigned int size = cmd->data_length, range; - int ret = 0, offset; - unsigned short dl, bd_dl; - - if (!dev->transport->do_discard) { - pr_err("UNMAP emulation not supported for: %s\n", - dev->transport->name); - cmd->scsi_sense_reason = TCM_UNSUPPORTED_SCSI_OPCODE; - return -ENOSYS; - } - - /* First UNMAP block descriptor starts at 8 byte offset */ - offset = 8; - size -= 8; - dl = get_unaligned_be16(&cdb[0]); - bd_dl = get_unaligned_be16(&cdb[2]); - - buf = transport_kmap_data_sg(cmd); - - ptr = &buf[offset]; - pr_debug("UNMAP: Sub: %s Using dl: %hu bd_dl: %hu size: %hu" - " ptr: %p\n", dev->transport->name, dl, bd_dl, size, ptr); - - while (size) { - lba = get_unaligned_be64(&ptr[0]); - range = get_unaligned_be32(&ptr[8]); - pr_debug("UNMAP: Using lba: %llu and range: %u\n", - (unsigned long long)lba, range); - - ret = dev->transport->do_discard(dev, lba, range); - if (ret < 0) { - pr_err("blkdev_issue_discard() failed: %d\n", - ret); - goto err; - } - - ptr += 16; - size -= 16; - } - -err: - transport_kunmap_data_sg(cmd); - if (!ret) - target_complete_cmd(cmd, GOOD); - return ret; -} - -/* - * Used for TCM/IBLOCK and TCM/FILEIO for block/blk-lib.c level discard support. - * Note this is not used for TCM/pSCSI passthrough - */ -int target_emulate_write_same(struct se_cmd *cmd) -{ - struct se_device *dev = cmd->se_dev; - sector_t range; - sector_t lba = cmd->t_task_lba; - u32 num_blocks; - int ret; - - if (!dev->transport->do_discard) { - pr_err("WRITE_SAME emulation not supported" - " for: %s\n", dev->transport->name); - cmd->scsi_sense_reason = TCM_UNSUPPORTED_SCSI_OPCODE; - return -ENOSYS; - } - - if (cmd->t_task_cdb[0] == WRITE_SAME) - num_blocks = get_unaligned_be16(&cmd->t_task_cdb[7]); - else if (cmd->t_task_cdb[0] == WRITE_SAME_16) - num_blocks = get_unaligned_be32(&cmd->t_task_cdb[10]); - else /* WRITE_SAME_32 via VARIABLE_LENGTH_CMD */ - num_blocks = get_unaligned_be32(&cmd->t_task_cdb[28]); - - /* - * Use the explicit range when non zero is supplied, otherwise calculate - * the remaining range based on ->get_blocks() - starting LBA. - */ - if (num_blocks != 0) - range = num_blocks; - else - range = (dev->transport->get_blocks(dev) - lba) + 1; - - pr_debug("WRITE_SAME UNMAP: LBA: %llu Range: %llu\n", - (unsigned long long)lba, (unsigned long long)range); - - ret = dev->transport->do_discard(dev, lba, range); - if (ret < 0) { - pr_debug("blkdev_issue_discard() failed for WRITE_SAME\n"); - return ret; - } - - target_complete_cmd(cmd, GOOD); - return 0; -} - -int target_emulate_synchronize_cache(struct se_cmd *cmd) -{ - if (!cmd->se_dev->transport->do_sync_cache) { - pr_err("SYNCHRONIZE_CACHE emulation not supported" - " for: %s\n", cmd->se_dev->transport->name); - cmd->scsi_sense_reason = TCM_UNSUPPORTED_SCSI_OPCODE; - return -ENOSYS; - } - - cmd->se_dev->transport->do_sync_cache(cmd); - return 0; -} - -int target_emulate_noop(struct se_cmd *cmd) -{ - target_complete_cmd(cmd, GOOD); - return 0; -} diff --git a/drivers/target/target_core_internal.h b/drivers/target/target_core_internal.h index 165e82429687..031c2889f34c 100644 --- a/drivers/target/target_core_internal.h +++ b/drivers/target/target_core_internal.h @@ -4,17 +4,6 @@ /* target_core_alua.c */ extern struct t10_alua_lu_gp *default_lu_gp; -/* target_core_cdb.c */ -int target_emulate_inquiry(struct se_cmd *cmd); -int target_emulate_readcapacity(struct se_cmd *cmd); -int target_emulate_readcapacity_16(struct se_cmd *cmd); -int target_emulate_modesense(struct se_cmd *cmd); -int target_emulate_request_sense(struct se_cmd *cmd); -int target_emulate_unmap(struct se_cmd *cmd); -int target_emulate_write_same(struct se_cmd *cmd); -int target_emulate_synchronize_cache(struct se_cmd *cmd); -int target_emulate_noop(struct se_cmd *cmd); - /* target_core_device.c */ struct se_dev_entry *core_get_se_deve_from_rtpi(struct se_node_acl *, u16); int core_free_device_list_for_node(struct se_node_acl *, @@ -116,6 +105,7 @@ int transport_dump_vpd_ident(struct t10_vpd *, unsigned char *, int); bool target_stop_cmd(struct se_cmd *cmd, unsigned long *flags); int transport_clear_lun_from_sessions(struct se_lun *); void transport_send_task_abort(struct se_cmd *); +int target_cmd_size_check(struct se_cmd *cmd, unsigned int size); /* target_core_stat.c */ void target_stat_setup_dev_default_groups(struct se_subsystem_dev *); diff --git a/drivers/target/target_core_pscsi.c b/drivers/target/target_core_pscsi.c index 378da242d841..099c59d31b1f 100644 --- a/drivers/target/target_core_pscsi.c +++ b/drivers/target/target_core_pscsi.c @@ -1022,470 +1022,53 @@ fail: return -ENOMEM; } -static inline u32 pscsi_get_sectors_6( - unsigned char *cdb, - struct se_cmd *cmd, - int *ret) +static int pscsi_parse_cdb(struct se_cmd *cmd) { - struct se_device *dev = cmd->se_dev; - - /* - * Assume TYPE_DISK for non struct se_device objects. - * Use 8-bit sector value. - */ - if (!dev) - goto type_disk; - - /* - * Use 24-bit allocation length for TYPE_TAPE. - */ - if (dev->transport->get_device_type(dev) == TYPE_TAPE) - return (u32)(cdb[2] << 16) + (cdb[3] << 8) + cdb[4]; - - /* - * Everything else assume TYPE_DISK Sector CDB location. - * Use 8-bit sector value. SBC-3 says: - * - * A TRANSFER LENGTH field set to zero specifies that 256 - * logical blocks shall be written. Any other value - * specifies the number of logical blocks that shall be - * written. - */ -type_disk: - return cdb[4] ? : 256; -} - -static inline u32 pscsi_get_sectors_10( - unsigned char *cdb, - struct se_cmd *cmd, - int *ret) -{ - struct se_device *dev = cmd->se_dev; - - /* - * Assume TYPE_DISK for non struct se_device objects. - * Use 16-bit sector value. - */ - if (!dev) - goto type_disk; - - /* - * XXX_10 is not defined in SSC, throw an exception - */ - if (dev->transport->get_device_type(dev) == TYPE_TAPE) { - *ret = -EINVAL; - return 0; - } - - /* - * Everything else assume TYPE_DISK Sector CDB location. - * Use 16-bit sector value. - */ -type_disk: - return (u32)(cdb[7] << 8) + cdb[8]; -} - -static inline u32 pscsi_get_sectors_12( - unsigned char *cdb, - struct se_cmd *cmd, - int *ret) -{ - struct se_device *dev = cmd->se_dev; - - /* - * Assume TYPE_DISK for non struct se_device objects. - * Use 32-bit sector value. - */ - if (!dev) - goto type_disk; + unsigned char *cdb = cmd->t_task_cdb; + unsigned int dummy_size; + int ret; - /* - * XXX_12 is not defined in SSC, throw an exception - */ - if (dev->transport->get_device_type(dev) == TYPE_TAPE) { - *ret = -EINVAL; - return 0; + if (cmd->se_cmd_flags & SCF_BIDI) { + cmd->se_cmd_flags |= SCF_SCSI_CDB_EXCEPTION; + cmd->scsi_sense_reason = TCM_UNSUPPORTED_SCSI_OPCODE; + return -EINVAL; } /* - * Everything else assume TYPE_DISK Sector CDB location. - * Use 32-bit sector value. + * For REPORT LUNS we always need to emulate the respone, and for everything + * related to persistent reservations and ALUA we might optionally use our + * handlers before passing on the command to the physical hardware. */ -type_disk: - return (u32)(cdb[6] << 24) + (cdb[7] << 16) + (cdb[8] << 8) + cdb[9]; -} - -static inline u32 pscsi_get_sectors_16( - unsigned char *cdb, - struct se_cmd *cmd, - int *ret) -{ - struct se_device *dev = cmd->se_dev; - - /* - * Assume TYPE_DISK for non struct se_device objects. - * Use 32-bit sector value. - */ - if (!dev) - goto type_disk; - - /* - * Use 24-bit allocation length for TYPE_TAPE. - */ - if (dev->transport->get_device_type(dev) == TYPE_TAPE) - return (u32)(cdb[12] << 16) + (cdb[13] << 8) + cdb[14]; - -type_disk: - return (u32)(cdb[10] << 24) + (cdb[11] << 16) + - (cdb[12] << 8) + cdb[13]; -} - -/* - * Used for VARIABLE_LENGTH_CDB WRITE_32 and READ_32 variants - */ -static inline u32 pscsi_get_sectors_32( - unsigned char *cdb, - struct se_cmd *cmd, - int *ret) -{ - /* - * Assume TYPE_DISK for non struct se_device objects. - * Use 32-bit sector value. - */ - return (u32)(cdb[28] << 24) + (cdb[29] << 16) + - (cdb[30] << 8) + cdb[31]; - -} - -static inline u32 pscsi_get_lba_21(unsigned char *cdb) -{ - return ((cdb[1] & 0x1f) << 16) | (cdb[2] << 8) | cdb[3]; -} - -static inline u32 pscsi_get_lba_32(unsigned char *cdb) -{ - return (cdb[2] << 24) | (cdb[3] << 16) | (cdb[4] << 8) | cdb[5]; -} - -static inline unsigned long long pscsi_get_lba_64(unsigned char *cdb) -{ - unsigned int __v1, __v2; - - __v1 = (cdb[2] << 24) | (cdb[3] << 16) | (cdb[4] << 8) | cdb[5]; - __v2 = (cdb[6] << 24) | (cdb[7] << 16) | (cdb[8] << 8) | cdb[9]; - - return ((unsigned long long)__v2) | (unsigned long long)__v1 << 32; -} - -/* - * For VARIABLE_LENGTH_CDB w/ 32 byte extended CDBs - */ -static inline unsigned long long pscsi_get_lba_64_ext(unsigned char *cdb) -{ - unsigned int __v1, __v2; - - __v1 = (cdb[12] << 24) | (cdb[13] << 16) | (cdb[14] << 8) | cdb[15]; - __v2 = (cdb[16] << 24) | (cdb[17] << 16) | (cdb[18] << 8) | cdb[19]; - - return ((unsigned long long)__v2) | (unsigned long long)__v1 << 32; -} - - -static inline u32 pscsi_get_size( - u32 sectors, - unsigned char *cdb, - struct se_cmd *cmd) -{ - struct se_device *dev = cmd->se_dev; - - if (dev->transport->get_device_type(dev) == TYPE_TAPE) { - if (cdb[1] & 1) { /* sectors */ - return dev->se_sub_dev->se_dev_attrib.block_size * sectors; - } else /* bytes */ - return sectors; - } - - pr_debug("Returning block_size: %u, sectors: %u == %u for" - " %s object\n", dev->se_sub_dev->se_dev_attrib.block_size, - sectors, dev->se_sub_dev->se_dev_attrib.block_size * sectors, - dev->transport->name); - - return dev->se_sub_dev->se_dev_attrib.block_size * sectors; -} - -static int pscsi_parse_cdb(struct se_cmd *cmd, unsigned int *size) -{ - struct se_device *dev = cmd->se_dev; - struct se_subsystem_dev *su_dev = dev->se_sub_dev; - unsigned char *cdb = cmd->t_task_cdb; - int sector_ret = 0; - u32 sectors = 0; - u16 service_action; - int ret; - - if (cmd->se_cmd_flags & SCF_BIDI) - goto out_unsupported_cdb; - switch (cdb[0]) { - case READ_6: - sectors = pscsi_get_sectors_6(cdb, cmd, §or_ret); - if (sector_ret) - goto out_unsupported_cdb; - *size = pscsi_get_size(sectors, cdb, cmd); - cmd->t_task_lba = pscsi_get_lba_21(cdb); - cmd->se_cmd_flags |= SCF_SCSI_DATA_CDB; + case REPORT_LUNS: + case PERSISTENT_RESERVE_IN: + case PERSISTENT_RESERVE_OUT: + case RELEASE: + case RELEASE_10: + case RESERVE: + case RESERVE_10: + ret = spc_parse_cdb(cmd, &dummy_size); + if (ret) + return ret; break; + case READ_6: case READ_10: - sectors = pscsi_get_sectors_10(cdb, cmd, §or_ret); - if (sector_ret) - goto out_unsupported_cdb; - *size = pscsi_get_size(sectors, cdb, cmd); - cmd->t_task_lba = pscsi_get_lba_32(cdb); - cmd->se_cmd_flags |= SCF_SCSI_DATA_CDB; - break; case READ_12: - sectors = pscsi_get_sectors_12(cdb, cmd, §or_ret); - if (sector_ret) - goto out_unsupported_cdb; - *size = pscsi_get_size(sectors, cdb, cmd); - cmd->t_task_lba = pscsi_get_lba_32(cdb); - cmd->se_cmd_flags |= SCF_SCSI_DATA_CDB; - break; case READ_16: - sectors = pscsi_get_sectors_16(cdb, cmd, §or_ret); - if (sector_ret) - goto out_unsupported_cdb; - *size = pscsi_get_size(sectors, cdb, cmd); - cmd->t_task_lba = pscsi_get_lba_64(cdb); - cmd->se_cmd_flags |= SCF_SCSI_DATA_CDB; - break; case WRITE_6: - sectors = pscsi_get_sectors_6(cdb, cmd, §or_ret); - if (sector_ret) - goto out_unsupported_cdb; - *size = pscsi_get_size(sectors, cdb, cmd); - cmd->t_task_lba = pscsi_get_lba_21(cdb); - cmd->se_cmd_flags |= SCF_SCSI_DATA_CDB; - break; case WRITE_10: - case WRITE_VERIFY: - sectors = pscsi_get_sectors_10(cdb, cmd, §or_ret); - if (sector_ret) - goto out_unsupported_cdb; - *size = pscsi_get_size(sectors, cdb, cmd); - cmd->t_task_lba = pscsi_get_lba_32(cdb); - if (cdb[1] & 0x8) - cmd->se_cmd_flags |= SCF_FUA; - cmd->se_cmd_flags |= SCF_SCSI_DATA_CDB; - break; case WRITE_12: - sectors = pscsi_get_sectors_12(cdb, cmd, §or_ret); - if (sector_ret) - goto out_unsupported_cdb; - *size = pscsi_get_size(sectors, cdb, cmd); - cmd->t_task_lba = pscsi_get_lba_32(cdb); - if (cdb[1] & 0x8) - cmd->se_cmd_flags |= SCF_FUA; - cmd->se_cmd_flags |= SCF_SCSI_DATA_CDB; - break; case WRITE_16: - sectors = pscsi_get_sectors_16(cdb, cmd, §or_ret); - if (sector_ret) - goto out_unsupported_cdb; - *size = pscsi_get_size(sectors, cdb, cmd); - cmd->t_task_lba = pscsi_get_lba_64(cdb); - if (cdb[1] & 0x8) - cmd->se_cmd_flags |= SCF_FUA; + case WRITE_VERIFY: cmd->se_cmd_flags |= SCF_SCSI_DATA_CDB; break; - case VARIABLE_LENGTH_CMD: - service_action = get_unaligned_be16(&cdb[8]); - switch (service_action) { - case WRITE_SAME_32: - sectors = pscsi_get_sectors_32(cdb, cmd, §or_ret); - if (sector_ret) - goto out_unsupported_cdb; - - if (!sectors) { - pr_err("WSNZ=1, WRITE_SAME w/sectors=0 not" - " supported\n"); - goto out_invalid_cdb_field; - } - - *size = pscsi_get_size(1, cdb, cmd); - cmd->t_task_lba = get_unaligned_be64(&cdb[12]); - break; - default: - pr_err("VARIABLE_LENGTH_CMD service action" - " 0x%04x not supported\n", service_action); - goto out_unsupported_cdb; - } - break; - case GPCMD_READ_BUFFER_CAPACITY: - case GPCMD_SEND_OPC: - *size = (cdb[7] << 8) + cdb[8]; - break; - case READ_BLOCK_LIMITS: - *size = READ_BLOCK_LEN; - break; - case GPCMD_GET_CONFIGURATION: - case GPCMD_READ_FORMAT_CAPACITIES: - case GPCMD_READ_DISC_INFO: - case GPCMD_READ_TRACK_RZONE_INFO: - *size = (cdb[7] << 8) + cdb[8]; - break; - case GPCMD_MECHANISM_STATUS: - case GPCMD_READ_DVD_STRUCTURE: - *size = (cdb[8] << 8) + cdb[9]; - break; - case READ_POSITION: - *size = READ_POSITION_LEN; - break; - case READ_BUFFER: - *size = (cdb[6] << 16) + (cdb[7] << 8) + cdb[8]; - break; - case READ_CAPACITY: - *size = READ_CAP_LEN; - break; - case READ_MEDIA_SERIAL_NUMBER: - case SERVICE_ACTION_IN: - case ACCESS_CONTROL_IN: - case ACCESS_CONTROL_OUT: - *size = (cdb[10] << 24) | (cdb[11] << 16) | - (cdb[12] << 8) | cdb[13]; - break; - case READ_TOC: - *size = cdb[8]; - break; - case READ_ELEMENT_STATUS: - *size = 65536 * cdb[7] + 256 * cdb[8] + cdb[9]; - break; - case SYNCHRONIZE_CACHE: - case SYNCHRONIZE_CACHE_16: - /* - * Extract LBA and range to be flushed for emulated SYNCHRONIZE_CACHE - */ - if (cdb[0] == SYNCHRONIZE_CACHE) { - sectors = pscsi_get_sectors_10(cdb, cmd, §or_ret); - cmd->t_task_lba = pscsi_get_lba_32(cdb); - } else { - sectors = pscsi_get_sectors_16(cdb, cmd, §or_ret); - cmd->t_task_lba = pscsi_get_lba_64(cdb); - } - if (sector_ret) - goto out_unsupported_cdb; - - *size = pscsi_get_size(sectors, cdb, cmd); - break; - case UNMAP: - *size = get_unaligned_be16(&cdb[7]); - break; - case WRITE_SAME_16: - sectors = pscsi_get_sectors_16(cdb, cmd, §or_ret); - if (sector_ret) - goto out_unsupported_cdb; - - if (!sectors) { - pr_err("WSNZ=1, WRITE_SAME w/sectors=0 not supported\n"); - goto out_invalid_cdb_field; - } - - *size = pscsi_get_size(1, cdb, cmd); - cmd->t_task_lba = get_unaligned_be64(&cdb[2]); - break; - case WRITE_SAME: - sectors = pscsi_get_sectors_10(cdb, cmd, §or_ret); - if (sector_ret) - goto out_unsupported_cdb; - - if (!sectors) { - pr_err("WSNZ=1, WRITE_SAME w/sectors=0 not supported\n"); - goto out_invalid_cdb_field; - } - - *size = pscsi_get_size(1, cdb, cmd); - cmd->t_task_lba = get_unaligned_be32(&cdb[2]); - break; - case ALLOW_MEDIUM_REMOVAL: - case ERASE: - case REZERO_UNIT: - case SEEK_10: - case SPACE: - case START_STOP: - case VERIFY: - case WRITE_FILEMARKS: - case GPCMD_CLOSE_TRACK: - case INITIALIZE_ELEMENT_STATUS: - case GPCMD_LOAD_UNLOAD: - case GPCMD_SET_SPEED: - case MOVE_MEDIUM: - *size = 0; - break; - case GET_EVENT_STATUS_NOTIFICATION: - *size = (cdb[7] << 8) | cdb[8]; - break; - case ATA_16: - switch (cdb[2] & 0x3) { /* T_LENGTH */ - case 0x0: - sectors = 0; - break; - case 0x1: - sectors = (((cdb[1] & 0x1) ? cdb[3] : 0) << 8) | cdb[4]; - break; - case 0x2: - sectors = (((cdb[1] & 0x1) ? cdb[5] : 0) << 8) | cdb[6]; - break; - case 0x3: - pr_err("T_LENGTH=0x3 not supported for ATA_16\n"); - goto out_invalid_cdb_field; - } - - /* BYTE_BLOCK */ - if (cdb[2] & 0x4) { - /* BLOCK T_TYPE: 512 or sector */ - *size = sectors * ((cdb[2] & 0x10) ? - dev->se_sub_dev->se_dev_attrib.block_size : 512); - } else { - /* BYTE */ - *size = sectors; - } - break; default: - ret = spc_parse_cdb(cmd, size, true); - if (ret) - return ret; - } - - if (cmd->se_cmd_flags & SCF_SCSI_DATA_CDB) { - if (sectors > su_dev->se_dev_attrib.fabric_max_sectors) { - printk_ratelimited(KERN_ERR "SCSI OP %02xh with too" - " big sectors %u exceeds fabric_max_sectors:" - " %u\n", cdb[0], sectors, - su_dev->se_dev_attrib.fabric_max_sectors); - goto out_invalid_cdb_field; - } - if (sectors > su_dev->se_dev_attrib.hw_max_sectors) { - printk_ratelimited(KERN_ERR "SCSI OP %02xh with too" - " big sectors %u exceeds backend hw_max_sectors:" - " %u\n", cdb[0], sectors, - su_dev->se_dev_attrib.hw_max_sectors); - goto out_invalid_cdb_field; - } + break; } return 0; - -out_unsupported_cdb: - cmd->se_cmd_flags |= SCF_SCSI_CDB_EXCEPTION; - cmd->scsi_sense_reason = TCM_UNSUPPORTED_SCSI_OPCODE; - return -EINVAL; -out_invalid_cdb_field: - cmd->se_cmd_flags |= SCF_SCSI_CDB_EXCEPTION; - cmd->scsi_sense_reason = TCM_INVALID_CDB_FIELD; - return -EINVAL; } - static int pscsi_execute_cmd(struct se_cmd *cmd, struct scatterlist *sgl, u32 sgl_nents, enum dma_data_direction data_direction) { diff --git a/drivers/target/target_core_sbc.c b/drivers/target/target_core_sbc.c index 9d1ca3814876..a5bd0c0eba08 100644 --- a/drivers/target/target_core_sbc.c +++ b/drivers/target/target_core_sbc.c @@ -37,6 +37,192 @@ #include "target_core_ua.h" +static int sbc_emulate_readcapacity(struct se_cmd *cmd) +{ + struct se_device *dev = cmd->se_dev; + unsigned char *buf; + unsigned long long blocks_long = dev->transport->get_blocks(dev); + u32 blocks; + + if (blocks_long >= 0x00000000ffffffff) + blocks = 0xffffffff; + else + blocks = (u32)blocks_long; + + buf = transport_kmap_data_sg(cmd); + + buf[0] = (blocks >> 24) & 0xff; + buf[1] = (blocks >> 16) & 0xff; + buf[2] = (blocks >> 8) & 0xff; + buf[3] = blocks & 0xff; + buf[4] = (dev->se_sub_dev->se_dev_attrib.block_size >> 24) & 0xff; + buf[5] = (dev->se_sub_dev->se_dev_attrib.block_size >> 16) & 0xff; + buf[6] = (dev->se_sub_dev->se_dev_attrib.block_size >> 8) & 0xff; + buf[7] = dev->se_sub_dev->se_dev_attrib.block_size & 0xff; + + transport_kunmap_data_sg(cmd); + + target_complete_cmd(cmd, GOOD); + return 0; +} + +static int sbc_emulate_readcapacity_16(struct se_cmd *cmd) +{ + struct se_device *dev = cmd->se_dev; + unsigned char *buf; + unsigned long long blocks = dev->transport->get_blocks(dev); + + buf = transport_kmap_data_sg(cmd); + + buf[0] = (blocks >> 56) & 0xff; + buf[1] = (blocks >> 48) & 0xff; + buf[2] = (blocks >> 40) & 0xff; + buf[3] = (blocks >> 32) & 0xff; + buf[4] = (blocks >> 24) & 0xff; + buf[5] = (blocks >> 16) & 0xff; + buf[6] = (blocks >> 8) & 0xff; + buf[7] = blocks & 0xff; + buf[8] = (dev->se_sub_dev->se_dev_attrib.block_size >> 24) & 0xff; + buf[9] = (dev->se_sub_dev->se_dev_attrib.block_size >> 16) & 0xff; + buf[10] = (dev->se_sub_dev->se_dev_attrib.block_size >> 8) & 0xff; + buf[11] = dev->se_sub_dev->se_dev_attrib.block_size & 0xff; + /* + * Set Thin Provisioning Enable bit following sbc3r22 in section + * READ CAPACITY (16) byte 14 if emulate_tpu or emulate_tpws is enabled. + */ + if (dev->se_sub_dev->se_dev_attrib.emulate_tpu || dev->se_sub_dev->se_dev_attrib.emulate_tpws) + buf[14] = 0x80; + + transport_kunmap_data_sg(cmd); + + target_complete_cmd(cmd, GOOD); + return 0; +} + +/* + * Used for TCM/IBLOCK and TCM/FILEIO for block/blk-lib.c level discard support. + * Note this is not used for TCM/pSCSI passthrough + */ +static int sbc_emulate_unmap(struct se_cmd *cmd) +{ + struct se_device *dev = cmd->se_dev; + unsigned char *buf, *ptr = NULL; + unsigned char *cdb = &cmd->t_task_cdb[0]; + sector_t lba; + unsigned int size = cmd->data_length, range; + int ret = 0, offset; + unsigned short dl, bd_dl; + + if (!dev->transport->do_discard) { + pr_err("UNMAP emulation not supported for: %s\n", + dev->transport->name); + cmd->scsi_sense_reason = TCM_UNSUPPORTED_SCSI_OPCODE; + return -ENOSYS; + } + + /* First UNMAP block descriptor starts at 8 byte offset */ + offset = 8; + size -= 8; + dl = get_unaligned_be16(&cdb[0]); + bd_dl = get_unaligned_be16(&cdb[2]); + + buf = transport_kmap_data_sg(cmd); + + ptr = &buf[offset]; + pr_debug("UNMAP: Sub: %s Using dl: %hu bd_dl: %hu size: %hu" + " ptr: %p\n", dev->transport->name, dl, bd_dl, size, ptr); + + while (size) { + lba = get_unaligned_be64(&ptr[0]); + range = get_unaligned_be32(&ptr[8]); + pr_debug("UNMAP: Using lba: %llu and range: %u\n", + (unsigned long long)lba, range); + + ret = dev->transport->do_discard(dev, lba, range); + if (ret < 0) { + pr_err("blkdev_issue_discard() failed: %d\n", + ret); + goto err; + } + + ptr += 16; + size -= 16; + } + +err: + transport_kunmap_data_sg(cmd); + if (!ret) + target_complete_cmd(cmd, GOOD); + return ret; +} + +/* + * Used for TCM/IBLOCK and TCM/FILEIO for block/blk-lib.c level discard support. + * Note this is not used for TCM/pSCSI passthrough + */ +static int sbc_emulate_write_same(struct se_cmd *cmd) +{ + struct se_device *dev = cmd->se_dev; + sector_t range; + sector_t lba = cmd->t_task_lba; + u32 num_blocks; + int ret; + + if (!dev->transport->do_discard) { + pr_err("WRITE_SAME emulation not supported" + " for: %s\n", dev->transport->name); + cmd->scsi_sense_reason = TCM_UNSUPPORTED_SCSI_OPCODE; + return -ENOSYS; + } + + if (cmd->t_task_cdb[0] == WRITE_SAME) + num_blocks = get_unaligned_be16(&cmd->t_task_cdb[7]); + else if (cmd->t_task_cdb[0] == WRITE_SAME_16) + num_blocks = get_unaligned_be32(&cmd->t_task_cdb[10]); + else /* WRITE_SAME_32 via VARIABLE_LENGTH_CMD */ + num_blocks = get_unaligned_be32(&cmd->t_task_cdb[28]); + + /* + * Use the explicit range when non zero is supplied, otherwise calculate + * the remaining range based on ->get_blocks() - starting LBA. + */ + if (num_blocks != 0) + range = num_blocks; + else + range = (dev->transport->get_blocks(dev) - lba) + 1; + + pr_debug("WRITE_SAME UNMAP: LBA: %llu Range: %llu\n", + (unsigned long long)lba, (unsigned long long)range); + + ret = dev->transport->do_discard(dev, lba, range); + if (ret < 0) { + pr_debug("blkdev_issue_discard() failed for WRITE_SAME\n"); + return ret; + } + + target_complete_cmd(cmd, GOOD); + return 0; +} + +static int sbc_emulate_synchronize_cache(struct se_cmd *cmd) +{ + if (!cmd->se_dev->transport->do_sync_cache) { + pr_err("SYNCHRONIZE_CACHE emulation not supported" + " for: %s\n", cmd->se_dev->transport->name); + cmd->scsi_sense_reason = TCM_UNSUPPORTED_SCSI_OPCODE; + return -ENOSYS; + } + + cmd->se_dev->transport->do_sync_cache(cmd); + return 0; +} + +static int sbc_emulate_verify(struct se_cmd *cmd) +{ + target_complete_cmd(cmd, GOOD); + return 0; +} + static inline u32 sbc_get_size(struct se_cmd *cmd, u32 sectors) { return cmd->se_dev->se_sub_dev->se_dev_attrib.block_size * sectors; @@ -209,11 +395,12 @@ out: kfree(buf); } -int sbc_parse_cdb(struct se_cmd *cmd, unsigned int *size) +int sbc_parse_cdb(struct se_cmd *cmd) { struct se_subsystem_dev *su_dev = cmd->se_dev->se_sub_dev; struct se_device *dev = cmd->se_dev; unsigned char *cdb = cmd->t_task_cdb; + unsigned int size; u32 sectors = 0; int ret; @@ -311,12 +498,12 @@ int sbc_parse_cdb(struct se_cmd *cmd, unsigned int *size) goto out_invalid_cdb_field; } - *size = sbc_get_size(cmd, 1); + size = sbc_get_size(cmd, 1); cmd->t_task_lba = get_unaligned_be64(&cdb[12]); if (sbc_write_same_supported(dev, &cdb[10]) < 0) goto out_unsupported_cdb; - cmd->execute_cmd = target_emulate_write_same; + cmd->execute_cmd = sbc_emulate_write_same; break; default: pr_err("VARIABLE_LENGTH_CMD service action" @@ -326,20 +513,20 @@ int sbc_parse_cdb(struct se_cmd *cmd, unsigned int *size) break; } case READ_CAPACITY: - *size = READ_CAP_LEN; - cmd->execute_cmd = target_emulate_readcapacity; + size = READ_CAP_LEN; + cmd->execute_cmd = sbc_emulate_readcapacity; break; case SERVICE_ACTION_IN: switch (cmd->t_task_cdb[1] & 0x1f) { case SAI_READ_CAPACITY_16: - cmd->execute_cmd = target_emulate_readcapacity_16; + cmd->execute_cmd = sbc_emulate_readcapacity_16; break; default: pr_err("Unsupported SA: 0x%02x\n", cmd->t_task_cdb[1] & 0x1f); goto out_invalid_cdb_field; } - *size = (cdb[10] << 24) | (cdb[11] << 16) | + size = (cdb[10] << 24) | (cdb[11] << 16) | (cdb[12] << 8) | cdb[13]; break; case SYNCHRONIZE_CACHE: @@ -355,7 +542,7 @@ int sbc_parse_cdb(struct se_cmd *cmd, unsigned int *size) cmd->t_task_lba = transport_lba_64(cdb); } - *size = sbc_get_size(cmd, sectors); + size = sbc_get_size(cmd, sectors); /* * Check to ensure that LBA + Range does not exceed past end of @@ -365,11 +552,11 @@ int sbc_parse_cdb(struct se_cmd *cmd, unsigned int *size) if (sbc_check_valid_sectors(cmd) < 0) goto out_invalid_cdb_field; } - cmd->execute_cmd = target_emulate_synchronize_cache; + cmd->execute_cmd = sbc_emulate_synchronize_cache; break; case UNMAP: - *size = get_unaligned_be16(&cdb[7]); - cmd->execute_cmd = target_emulate_unmap; + size = get_unaligned_be16(&cdb[7]); + cmd->execute_cmd = sbc_emulate_unmap; break; case WRITE_SAME_16: sectors = transport_get_sectors_16(cdb); @@ -378,12 +565,12 @@ int sbc_parse_cdb(struct se_cmd *cmd, unsigned int *size) goto out_invalid_cdb_field; } - *size = sbc_get_size(cmd, 1); + size = sbc_get_size(cmd, 1); cmd->t_task_lba = get_unaligned_be64(&cdb[2]); if (sbc_write_same_supported(dev, &cdb[1]) < 0) goto out_unsupported_cdb; - cmd->execute_cmd = target_emulate_write_same; + cmd->execute_cmd = sbc_emulate_write_same; break; case WRITE_SAME: sectors = transport_get_sectors_10(cdb); @@ -392,7 +579,7 @@ int sbc_parse_cdb(struct se_cmd *cmd, unsigned int *size) goto out_invalid_cdb_field; } - *size = sbc_get_size(cmd, 1); + size = sbc_get_size(cmd, 1); cmd->t_task_lba = get_unaligned_be32(&cdb[2]); /* @@ -401,14 +588,14 @@ int sbc_parse_cdb(struct se_cmd *cmd, unsigned int *size) */ if (sbc_write_same_supported(dev, &cdb[1]) < 0) goto out_unsupported_cdb; - cmd->execute_cmd = target_emulate_write_same; + cmd->execute_cmd = sbc_emulate_write_same; break; case VERIFY: - *size = 0; - cmd->execute_cmd = target_emulate_noop; + size = 0; + cmd->execute_cmd = sbc_emulate_verify; break; default: - ret = spc_parse_cdb(cmd, size, false); + ret = spc_parse_cdb(cmd, &size); if (ret) return ret; } @@ -418,6 +605,8 @@ int sbc_parse_cdb(struct se_cmd *cmd, unsigned int *size) goto out_unsupported_cdb; if (cmd->se_cmd_flags & SCF_SCSI_DATA_CDB) { + unsigned long long end_lba; + if (sectors > su_dev->se_dev_attrib.fabric_max_sectors) { printk_ratelimited(KERN_ERR "SCSI OP %02xh with too" " big sectors %u exceeds fabric_max_sectors:" @@ -433,9 +622,21 @@ int sbc_parse_cdb(struct se_cmd *cmd, unsigned int *size) goto out_invalid_cdb_field; } - *size = sbc_get_size(cmd, sectors); + end_lba = dev->transport->get_blocks(dev) + 1; + if (cmd->t_task_lba + sectors > end_lba) { + pr_err("cmd exceeds last lba %llu " + "(lba %llu, sectors %u)\n", + end_lba, cmd->t_task_lba, sectors); + goto out_invalid_cdb_field; + } + + size = sbc_get_size(cmd, sectors); } + ret = target_cmd_size_check(cmd, size); + if (ret < 0) + return ret; + return 0; out_unsupported_cdb: diff --git a/drivers/target/target_core_spc.c b/drivers/target/target_core_spc.c index 156291fbf6d8..96dcb57089f7 100644 --- a/drivers/target/target_core_spc.c +++ b/drivers/target/target_core_spc.c @@ -39,7 +39,906 @@ #include "target_core_ua.h" -int spc_parse_cdb(struct se_cmd *cmd, unsigned int *size, bool passthrough) +static void spc_fill_alua_data(struct se_port *port, unsigned char *buf) +{ + struct t10_alua_tg_pt_gp *tg_pt_gp; + struct t10_alua_tg_pt_gp_member *tg_pt_gp_mem; + + /* + * Set SCCS for MAINTENANCE_IN + REPORT_TARGET_PORT_GROUPS. + */ + buf[5] = 0x80; + + /* + * Set TPGS field for explict and/or implict ALUA access type + * and opteration. + * + * See spc4r17 section 6.4.2 Table 135 + */ + if (!port) + return; + tg_pt_gp_mem = port->sep_alua_tg_pt_gp_mem; + if (!tg_pt_gp_mem) + return; + + spin_lock(&tg_pt_gp_mem->tg_pt_gp_mem_lock); + tg_pt_gp = tg_pt_gp_mem->tg_pt_gp; + if (tg_pt_gp) + buf[5] |= tg_pt_gp->tg_pt_gp_alua_access_type; + spin_unlock(&tg_pt_gp_mem->tg_pt_gp_mem_lock); +} + +static int spc_emulate_inquiry_std(struct se_cmd *cmd, char *buf) +{ + struct se_lun *lun = cmd->se_lun; + struct se_device *dev = cmd->se_dev; + + /* Set RMB (removable media) for tape devices */ + if (dev->transport->get_device_type(dev) == TYPE_TAPE) + buf[1] = 0x80; + + buf[2] = dev->transport->get_device_rev(dev); + + /* + * NORMACA and HISUP = 0, RESPONSE DATA FORMAT = 2 + * + * SPC4 says: + * A RESPONSE DATA FORMAT field set to 2h indicates that the + * standard INQUIRY data is in the format defined in this + * standard. Response data format values less than 2h are + * obsolete. Response data format values greater than 2h are + * reserved. + */ + buf[3] = 2; + + /* + * Enable SCCS and TPGS fields for Emulated ALUA + */ + if (dev->se_sub_dev->t10_alua.alua_type == SPC3_ALUA_EMULATED) + spc_fill_alua_data(lun->lun_sep, buf); + + buf[7] = 0x2; /* CmdQue=1 */ + + snprintf(&buf[8], 8, "LIO-ORG"); + snprintf(&buf[16], 16, "%s", dev->se_sub_dev->t10_wwn.model); + snprintf(&buf[32], 4, "%s", dev->se_sub_dev->t10_wwn.revision); + buf[4] = 31; /* Set additional length to 31 */ + + return 0; +} + +/* unit serial number */ +static int spc_emulate_evpd_80(struct se_cmd *cmd, unsigned char *buf) +{ + struct se_device *dev = cmd->se_dev; + u16 len = 0; + + if (dev->se_sub_dev->su_dev_flags & + SDF_EMULATED_VPD_UNIT_SERIAL) { + u32 unit_serial_len; + + unit_serial_len = strlen(dev->se_sub_dev->t10_wwn.unit_serial); + unit_serial_len++; /* For NULL Terminator */ + + len += sprintf(&buf[4], "%s", + dev->se_sub_dev->t10_wwn.unit_serial); + len++; /* Extra Byte for NULL Terminator */ + buf[3] = len; + } + return 0; +} + +static void spc_parse_naa_6h_vendor_specific(struct se_device *dev, + unsigned char *buf) +{ + unsigned char *p = &dev->se_sub_dev->t10_wwn.unit_serial[0]; + int cnt; + bool next = true; + + /* + * Generate up to 36 bits of VENDOR SPECIFIC IDENTIFIER starting on + * byte 3 bit 3-0 for NAA IEEE Registered Extended DESIGNATOR field + * format, followed by 64 bits of VENDOR SPECIFIC IDENTIFIER EXTENSION + * to complete the payload. These are based from VPD=0x80 PRODUCT SERIAL + * NUMBER set via vpd_unit_serial in target_core_configfs.c to ensure + * per device uniqeness. + */ + for (cnt = 0; *p && cnt < 13; p++) { + int val = hex_to_bin(*p); + + if (val < 0) + continue; + + if (next) { + next = false; + buf[cnt++] |= val; + } else { + next = true; + buf[cnt] = val << 4; + } + } +} + +/* + * Device identification VPD, for a complete list of + * DESIGNATOR TYPEs see spc4r17 Table 459. + */ +static int spc_emulate_evpd_83(struct se_cmd *cmd, unsigned char *buf) +{ + struct se_device *dev = cmd->se_dev; + struct se_lun *lun = cmd->se_lun; + struct se_port *port = NULL; + struct se_portal_group *tpg = NULL; + struct t10_alua_lu_gp_member *lu_gp_mem; + struct t10_alua_tg_pt_gp *tg_pt_gp; + struct t10_alua_tg_pt_gp_member *tg_pt_gp_mem; + unsigned char *prod = &dev->se_sub_dev->t10_wwn.model[0]; + u32 prod_len; + u32 unit_serial_len, off = 0; + u16 len = 0, id_len; + + off = 4; + + /* + * NAA IEEE Registered Extended Assigned designator format, see + * spc4r17 section 7.7.3.6.5 + * + * We depend upon a target_core_mod/ConfigFS provided + * /sys/kernel/config/target/core/$HBA/$DEV/wwn/vpd_unit_serial + * value in order to return the NAA id. + */ + if (!(dev->se_sub_dev->su_dev_flags & SDF_EMULATED_VPD_UNIT_SERIAL)) + goto check_t10_vend_desc; + + /* CODE SET == Binary */ + buf[off++] = 0x1; + + /* Set ASSOCIATION == addressed logical unit: 0)b */ + buf[off] = 0x00; + + /* Identifier/Designator type == NAA identifier */ + buf[off++] |= 0x3; + off++; + + /* Identifier/Designator length */ + buf[off++] = 0x10; + + /* + * Start NAA IEEE Registered Extended Identifier/Designator + */ + buf[off++] = (0x6 << 4); + + /* + * Use OpenFabrics IEEE Company ID: 00 14 05 + */ + buf[off++] = 0x01; + buf[off++] = 0x40; + buf[off] = (0x5 << 4); + + /* + * Return ConfigFS Unit Serial Number information for + * VENDOR_SPECIFIC_IDENTIFIER and + * VENDOR_SPECIFIC_IDENTIFIER_EXTENTION + */ + spc_parse_naa_6h_vendor_specific(dev, &buf[off]); + + len = 20; + off = (len + 4); + +check_t10_vend_desc: + /* + * T10 Vendor Identifier Page, see spc4r17 section 7.7.3.4 + */ + id_len = 8; /* For Vendor field */ + prod_len = 4; /* For VPD Header */ + prod_len += 8; /* For Vendor field */ + prod_len += strlen(prod); + prod_len++; /* For : */ + + if (dev->se_sub_dev->su_dev_flags & + SDF_EMULATED_VPD_UNIT_SERIAL) { + unit_serial_len = + strlen(&dev->se_sub_dev->t10_wwn.unit_serial[0]); + unit_serial_len++; /* For NULL Terminator */ + + id_len += sprintf(&buf[off+12], "%s:%s", prod, + &dev->se_sub_dev->t10_wwn.unit_serial[0]); + } + buf[off] = 0x2; /* ASCII */ + buf[off+1] = 0x1; /* T10 Vendor ID */ + buf[off+2] = 0x0; + memcpy(&buf[off+4], "LIO-ORG", 8); + /* Extra Byte for NULL Terminator */ + id_len++; + /* Identifier Length */ + buf[off+3] = id_len; + /* Header size for Designation descriptor */ + len += (id_len + 4); + off += (id_len + 4); + /* + * struct se_port is only set for INQUIRY VPD=1 through $FABRIC_MOD + */ + port = lun->lun_sep; + if (port) { + struct t10_alua_lu_gp *lu_gp; + u32 padding, scsi_name_len; + u16 lu_gp_id = 0; + u16 tg_pt_gp_id = 0; + u16 tpgt; + + tpg = port->sep_tpg; + /* + * Relative target port identifer, see spc4r17 + * section 7.7.3.7 + * + * Get the PROTOCOL IDENTIFIER as defined by spc4r17 + * section 7.5.1 Table 362 + */ + buf[off] = + (tpg->se_tpg_tfo->get_fabric_proto_ident(tpg) << 4); + buf[off++] |= 0x1; /* CODE SET == Binary */ + buf[off] = 0x80; /* Set PIV=1 */ + /* Set ASSOCIATION == target port: 01b */ + buf[off] |= 0x10; + /* DESIGNATOR TYPE == Relative target port identifer */ + buf[off++] |= 0x4; + off++; /* Skip over Reserved */ + buf[off++] = 4; /* DESIGNATOR LENGTH */ + /* Skip over Obsolete field in RTPI payload + * in Table 472 */ + off += 2; + buf[off++] = ((port->sep_rtpi >> 8) & 0xff); + buf[off++] = (port->sep_rtpi & 0xff); + len += 8; /* Header size + Designation descriptor */ + /* + * Target port group identifier, see spc4r17 + * section 7.7.3.8 + * + * Get the PROTOCOL IDENTIFIER as defined by spc4r17 + * section 7.5.1 Table 362 + */ + if (dev->se_sub_dev->t10_alua.alua_type != + SPC3_ALUA_EMULATED) + goto check_scsi_name; + + tg_pt_gp_mem = port->sep_alua_tg_pt_gp_mem; + if (!tg_pt_gp_mem) + goto check_lu_gp; + + spin_lock(&tg_pt_gp_mem->tg_pt_gp_mem_lock); + tg_pt_gp = tg_pt_gp_mem->tg_pt_gp; + if (!tg_pt_gp) { + spin_unlock(&tg_pt_gp_mem->tg_pt_gp_mem_lock); + goto check_lu_gp; + } + tg_pt_gp_id = tg_pt_gp->tg_pt_gp_id; + spin_unlock(&tg_pt_gp_mem->tg_pt_gp_mem_lock); + + buf[off] = + (tpg->se_tpg_tfo->get_fabric_proto_ident(tpg) << 4); + buf[off++] |= 0x1; /* CODE SET == Binary */ + buf[off] = 0x80; /* Set PIV=1 */ + /* Set ASSOCIATION == target port: 01b */ + buf[off] |= 0x10; + /* DESIGNATOR TYPE == Target port group identifier */ + buf[off++] |= 0x5; + off++; /* Skip over Reserved */ + buf[off++] = 4; /* DESIGNATOR LENGTH */ + off += 2; /* Skip over Reserved Field */ + buf[off++] = ((tg_pt_gp_id >> 8) & 0xff); + buf[off++] = (tg_pt_gp_id & 0xff); + len += 8; /* Header size + Designation descriptor */ + /* + * Logical Unit Group identifier, see spc4r17 + * section 7.7.3.8 + */ +check_lu_gp: + lu_gp_mem = dev->dev_alua_lu_gp_mem; + if (!lu_gp_mem) + goto check_scsi_name; + + spin_lock(&lu_gp_mem->lu_gp_mem_lock); + lu_gp = lu_gp_mem->lu_gp; + if (!lu_gp) { + spin_unlock(&lu_gp_mem->lu_gp_mem_lock); + goto check_scsi_name; + } + lu_gp_id = lu_gp->lu_gp_id; + spin_unlock(&lu_gp_mem->lu_gp_mem_lock); + + buf[off++] |= 0x1; /* CODE SET == Binary */ + /* DESIGNATOR TYPE == Logical Unit Group identifier */ + buf[off++] |= 0x6; + off++; /* Skip over Reserved */ + buf[off++] = 4; /* DESIGNATOR LENGTH */ + off += 2; /* Skip over Reserved Field */ + buf[off++] = ((lu_gp_id >> 8) & 0xff); + buf[off++] = (lu_gp_id & 0xff); + len += 8; /* Header size + Designation descriptor */ + /* + * SCSI name string designator, see spc4r17 + * section 7.7.3.11 + * + * Get the PROTOCOL IDENTIFIER as defined by spc4r17 + * section 7.5.1 Table 362 + */ +check_scsi_name: + scsi_name_len = strlen(tpg->se_tpg_tfo->tpg_get_wwn(tpg)); + /* UTF-8 ",t,0x<16-bit TPGT>" + NULL Terminator */ + scsi_name_len += 10; + /* Check for 4-byte padding */ + padding = ((-scsi_name_len) & 3); + if (padding != 0) + scsi_name_len += padding; + /* Header size + Designation descriptor */ + scsi_name_len += 4; + + buf[off] = + (tpg->se_tpg_tfo->get_fabric_proto_ident(tpg) << 4); + buf[off++] |= 0x3; /* CODE SET == UTF-8 */ + buf[off] = 0x80; /* Set PIV=1 */ + /* Set ASSOCIATION == target port: 01b */ + buf[off] |= 0x10; + /* DESIGNATOR TYPE == SCSI name string */ + buf[off++] |= 0x8; + off += 2; /* Skip over Reserved and length */ + /* + * SCSI name string identifer containing, $FABRIC_MOD + * dependent information. For LIO-Target and iSCSI + * Target Port, this means "<iSCSI name>,t,0x<TPGT> in + * UTF-8 encoding. + */ + tpgt = tpg->se_tpg_tfo->tpg_get_tag(tpg); + scsi_name_len = sprintf(&buf[off], "%s,t,0x%04x", + tpg->se_tpg_tfo->tpg_get_wwn(tpg), tpgt); + scsi_name_len += 1 /* Include NULL terminator */; + /* + * The null-terminated, null-padded (see 4.4.2) SCSI + * NAME STRING field contains a UTF-8 format string. + * The number of bytes in the SCSI NAME STRING field + * (i.e., the value in the DESIGNATOR LENGTH field) + * shall be no larger than 256 and shall be a multiple + * of four. + */ + if (padding) + scsi_name_len += padding; + + buf[off-1] = scsi_name_len; + off += scsi_name_len; + /* Header size + Designation descriptor */ + len += (scsi_name_len + 4); + } + buf[2] = ((len >> 8) & 0xff); + buf[3] = (len & 0xff); /* Page Length for VPD 0x83 */ + return 0; +} + +/* Extended INQUIRY Data VPD Page */ +static int spc_emulate_evpd_86(struct se_cmd *cmd, unsigned char *buf) +{ + buf[3] = 0x3c; + /* Set HEADSUP, ORDSUP, SIMPSUP */ + buf[5] = 0x07; + + /* If WriteCache emulation is enabled, set V_SUP */ + if (cmd->se_dev->se_sub_dev->se_dev_attrib.emulate_write_cache > 0) + buf[6] = 0x01; + return 0; +} + +/* Block Limits VPD page */ +static int spc_emulate_evpd_b0(struct se_cmd *cmd, unsigned char *buf) +{ + struct se_device *dev = cmd->se_dev; + u32 max_sectors; + int have_tp = 0; + + /* + * Following spc3r22 section 6.5.3 Block Limits VPD page, when + * emulate_tpu=1 or emulate_tpws=1 we will be expect a + * different page length for Thin Provisioning. + */ + if (dev->se_sub_dev->se_dev_attrib.emulate_tpu || dev->se_sub_dev->se_dev_attrib.emulate_tpws) + have_tp = 1; + + buf[0] = dev->transport->get_device_type(dev); + buf[3] = have_tp ? 0x3c : 0x10; + + /* Set WSNZ to 1 */ + buf[4] = 0x01; + + /* + * Set OPTIMAL TRANSFER LENGTH GRANULARITY + */ + put_unaligned_be16(1, &buf[6]); + + /* + * Set MAXIMUM TRANSFER LENGTH + */ + max_sectors = min(dev->se_sub_dev->se_dev_attrib.fabric_max_sectors, + dev->se_sub_dev->se_dev_attrib.hw_max_sectors); + put_unaligned_be32(max_sectors, &buf[8]); + + /* + * Set OPTIMAL TRANSFER LENGTH + */ + put_unaligned_be32(dev->se_sub_dev->se_dev_attrib.optimal_sectors, &buf[12]); + + /* + * Exit now if we don't support TP. + */ + if (!have_tp) + return 0; + + /* + * Set MAXIMUM UNMAP LBA COUNT + */ + put_unaligned_be32(dev->se_sub_dev->se_dev_attrib.max_unmap_lba_count, &buf[20]); + + /* + * Set MAXIMUM UNMAP BLOCK DESCRIPTOR COUNT + */ + put_unaligned_be32(dev->se_sub_dev->se_dev_attrib.max_unmap_block_desc_count, + &buf[24]); + + /* + * Set OPTIMAL UNMAP GRANULARITY + */ + put_unaligned_be32(dev->se_sub_dev->se_dev_attrib.unmap_granularity, &buf[28]); + + /* + * UNMAP GRANULARITY ALIGNMENT + */ + put_unaligned_be32(dev->se_sub_dev->se_dev_attrib.unmap_granularity_alignment, + &buf[32]); + if (dev->se_sub_dev->se_dev_attrib.unmap_granularity_alignment != 0) + buf[32] |= 0x80; /* Set the UGAVALID bit */ + + return 0; +} + +/* Block Device Characteristics VPD page */ +static int spc_emulate_evpd_b1(struct se_cmd *cmd, unsigned char *buf) +{ + struct se_device *dev = cmd->se_dev; + + buf[0] = dev->transport->get_device_type(dev); + buf[3] = 0x3c; + buf[5] = dev->se_sub_dev->se_dev_attrib.is_nonrot ? 1 : 0; + + return 0; +} + +/* Thin Provisioning VPD */ +static int spc_emulate_evpd_b2(struct se_cmd *cmd, unsigned char *buf) +{ + struct se_device *dev = cmd->se_dev; + + /* + * From spc3r22 section 6.5.4 Thin Provisioning VPD page: + * + * The PAGE LENGTH field is defined in SPC-4. If the DP bit is set to + * zero, then the page length shall be set to 0004h. If the DP bit + * is set to one, then the page length shall be set to the value + * defined in table 162. + */ + buf[0] = dev->transport->get_device_type(dev); + + /* + * Set Hardcoded length mentioned above for DP=0 + */ + put_unaligned_be16(0x0004, &buf[2]); + + /* + * The THRESHOLD EXPONENT field indicates the threshold set size in + * LBAs as a power of 2 (i.e., the threshold set size is equal to + * 2(threshold exponent)). + * + * Note that this is currently set to 0x00 as mkp says it will be + * changing again. We can enable this once it has settled in T10 + * and is actually used by Linux/SCSI ML code. + */ + buf[4] = 0x00; + + /* + * A TPU bit set to one indicates that the device server supports + * the UNMAP command (see 5.25). A TPU bit set to zero indicates + * that the device server does not support the UNMAP command. + */ + if (dev->se_sub_dev->se_dev_attrib.emulate_tpu != 0) + buf[5] = 0x80; + + /* + * A TPWS bit set to one indicates that the device server supports + * the use of the WRITE SAME (16) command (see 5.42) to unmap LBAs. + * A TPWS bit set to zero indicates that the device server does not + * support the use of the WRITE SAME (16) command to unmap LBAs. + */ + if (dev->se_sub_dev->se_dev_attrib.emulate_tpws != 0) + buf[5] |= 0x40; + + return 0; +} + +static int spc_emulate_evpd_00(struct se_cmd *cmd, unsigned char *buf); + +static struct { + uint8_t page; + int (*emulate)(struct se_cmd *, unsigned char *); +} evpd_handlers[] = { + { .page = 0x00, .emulate = spc_emulate_evpd_00 }, + { .page = 0x80, .emulate = spc_emulate_evpd_80 }, + { .page = 0x83, .emulate = spc_emulate_evpd_83 }, + { .page = 0x86, .emulate = spc_emulate_evpd_86 }, + { .page = 0xb0, .emulate = spc_emulate_evpd_b0 }, + { .page = 0xb1, .emulate = spc_emulate_evpd_b1 }, + { .page = 0xb2, .emulate = spc_emulate_evpd_b2 }, +}; + +/* supported vital product data pages */ +static int spc_emulate_evpd_00(struct se_cmd *cmd, unsigned char *buf) +{ + int p; + + /* + * Only report the INQUIRY EVPD=1 pages after a valid NAA + * Registered Extended LUN WWN has been set via ConfigFS + * during device creation/restart. + */ + if (cmd->se_dev->se_sub_dev->su_dev_flags & + SDF_EMULATED_VPD_UNIT_SERIAL) { + buf[3] = ARRAY_SIZE(evpd_handlers); + for (p = 0; p < ARRAY_SIZE(evpd_handlers); ++p) + buf[p + 4] = evpd_handlers[p].page; + } + + return 0; +} + +static int spc_emulate_inquiry(struct se_cmd *cmd) +{ + struct se_device *dev = cmd->se_dev; + struct se_portal_group *tpg = cmd->se_lun->lun_sep->sep_tpg; + unsigned char *buf, *map_buf; + unsigned char *cdb = cmd->t_task_cdb; + int p, ret; + + map_buf = transport_kmap_data_sg(cmd); + /* + * If SCF_PASSTHROUGH_SG_TO_MEM_NOALLOC is not set, then we + * know we actually allocated a full page. Otherwise, if the + * data buffer is too small, allocate a temporary buffer so we + * don't have to worry about overruns in all our INQUIRY + * emulation handling. + */ + if (cmd->data_length < SE_INQUIRY_BUF && + (cmd->se_cmd_flags & SCF_PASSTHROUGH_SG_TO_MEM_NOALLOC)) { + buf = kzalloc(SE_INQUIRY_BUF, GFP_KERNEL); + if (!buf) { + transport_kunmap_data_sg(cmd); + cmd->scsi_sense_reason = TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; + return -ENOMEM; + } + } else { + buf = map_buf; + } + + if (dev == tpg->tpg_virt_lun0.lun_se_dev) + buf[0] = 0x3f; /* Not connected */ + else + buf[0] = dev->transport->get_device_type(dev); + + if (!(cdb[1] & 0x1)) { + if (cdb[2]) { + pr_err("INQUIRY with EVPD==0 but PAGE CODE=%02x\n", + cdb[2]); + cmd->scsi_sense_reason = TCM_INVALID_CDB_FIELD; + ret = -EINVAL; + goto out; + } + + ret = spc_emulate_inquiry_std(cmd, buf); + goto out; + } + + for (p = 0; p < ARRAY_SIZE(evpd_handlers); ++p) { + if (cdb[2] == evpd_handlers[p].page) { + buf[1] = cdb[2]; + ret = evpd_handlers[p].emulate(cmd, buf); + goto out; + } + } + + pr_err("Unknown VPD Code: 0x%02x\n", cdb[2]); + cmd->scsi_sense_reason = TCM_INVALID_CDB_FIELD; + ret = -EINVAL; + +out: + if (buf != map_buf) { + memcpy(map_buf, buf, cmd->data_length); + kfree(buf); + } + transport_kunmap_data_sg(cmd); + + if (!ret) + target_complete_cmd(cmd, GOOD); + return ret; +} + +static int spc_modesense_rwrecovery(unsigned char *p) +{ + p[0] = 0x01; + p[1] = 0x0a; + + return 12; +} + +static int spc_modesense_control(struct se_device *dev, unsigned char *p) +{ + p[0] = 0x0a; + p[1] = 0x0a; + p[2] = 2; + /* + * From spc4r23, 7.4.7 Control mode page + * + * The QUEUE ALGORITHM MODIFIER field (see table 368) specifies + * restrictions on the algorithm used for reordering commands + * having the SIMPLE task attribute (see SAM-4). + * + * Table 368 -- QUEUE ALGORITHM MODIFIER field + * Code Description + * 0h Restricted reordering + * 1h Unrestricted reordering allowed + * 2h to 7h Reserved + * 8h to Fh Vendor specific + * + * A value of zero in the QUEUE ALGORITHM MODIFIER field specifies that + * the device server shall order the processing sequence of commands + * having the SIMPLE task attribute such that data integrity is maintained + * for that I_T nexus (i.e., if the transmission of new SCSI transport protocol + * requests is halted at any time, the final value of all data observable + * on the medium shall be the same as if all the commands had been processed + * with the ORDERED task attribute). + * + * A value of one in the QUEUE ALGORITHM MODIFIER field specifies that the + * device server may reorder the processing sequence of commands having the + * SIMPLE task attribute in any manner. Any data integrity exposures related to + * command sequence order shall be explicitly handled by the application client + * through the selection of appropriate ommands and task attributes. + */ + p[3] = (dev->se_sub_dev->se_dev_attrib.emulate_rest_reord == 1) ? 0x00 : 0x10; + /* + * From spc4r17, section 7.4.6 Control mode Page + * + * Unit Attention interlocks control (UN_INTLCK_CTRL) to code 00b + * + * 00b: The logical unit shall clear any unit attention condition + * reported in the same I_T_L_Q nexus transaction as a CHECK CONDITION + * status and shall not establish a unit attention condition when a com- + * mand is completed with BUSY, TASK SET FULL, or RESERVATION CONFLICT + * status. + * + * 10b: The logical unit shall not clear any unit attention condition + * reported in the same I_T_L_Q nexus transaction as a CHECK CONDITION + * status and shall not establish a unit attention condition when + * a command is completed with BUSY, TASK SET FULL, or RESERVATION + * CONFLICT status. + * + * 11b a The logical unit shall not clear any unit attention condition + * reported in the same I_T_L_Q nexus transaction as a CHECK CONDITION + * status and shall establish a unit attention condition for the + * initiator port associated with the I_T nexus on which the BUSY, + * TASK SET FULL, or RESERVATION CONFLICT status is being returned. + * Depending on the status, the additional sense code shall be set to + * PREVIOUS BUSY STATUS, PREVIOUS TASK SET FULL STATUS, or PREVIOUS + * RESERVATION CONFLICT STATUS. Until it is cleared by a REQUEST SENSE + * command, a unit attention condition shall be established only once + * for a BUSY, TASK SET FULL, or RESERVATION CONFLICT status regardless + * to the number of commands completed with one of those status codes. + */ + p[4] = (dev->se_sub_dev->se_dev_attrib.emulate_ua_intlck_ctrl == 2) ? 0x30 : + (dev->se_sub_dev->se_dev_attrib.emulate_ua_intlck_ctrl == 1) ? 0x20 : 0x00; + /* + * From spc4r17, section 7.4.6 Control mode Page + * + * Task Aborted Status (TAS) bit set to zero. + * + * A task aborted status (TAS) bit set to zero specifies that aborted + * tasks shall be terminated by the device server without any response + * to the application client. A TAS bit set to one specifies that tasks + * aborted by the actions of an I_T nexus other than the I_T nexus on + * which the command was received shall be completed with TASK ABORTED + * status (see SAM-4). + */ + p[5] = (dev->se_sub_dev->se_dev_attrib.emulate_tas) ? 0x40 : 0x00; + p[8] = 0xff; + p[9] = 0xff; + p[11] = 30; + + return 12; +} + +static int spc_modesense_caching(struct se_device *dev, unsigned char *p) +{ + p[0] = 0x08; + p[1] = 0x12; + if (dev->se_sub_dev->se_dev_attrib.emulate_write_cache > 0) + p[2] = 0x04; /* Write Cache Enable */ + p[12] = 0x20; /* Disabled Read Ahead */ + + return 20; +} + +static void spc_modesense_write_protect(unsigned char *buf, int type) +{ + /* + * I believe that the WP bit (bit 7) in the mode header is the same for + * all device types.. + */ + switch (type) { + case TYPE_DISK: + case TYPE_TAPE: + default: + buf[0] |= 0x80; /* WP bit */ + break; + } +} + +static void spc_modesense_dpofua(unsigned char *buf, int type) +{ + switch (type) { + case TYPE_DISK: + buf[0] |= 0x10; /* DPOFUA bit */ + break; + default: + break; + } +} + +static int spc_emulate_modesense(struct se_cmd *cmd) +{ + struct se_device *dev = cmd->se_dev; + char *cdb = cmd->t_task_cdb; + unsigned char *rbuf; + int type = dev->transport->get_device_type(dev); + int ten = (cmd->t_task_cdb[0] == MODE_SENSE_10); + int offset = ten ? 8 : 4; + int length = 0; + unsigned char buf[SE_MODE_PAGE_BUF]; + + memset(buf, 0, SE_MODE_PAGE_BUF); + + switch (cdb[2] & 0x3f) { + case 0x01: + length = spc_modesense_rwrecovery(&buf[offset]); + break; + case 0x08: + length = spc_modesense_caching(dev, &buf[offset]); + break; + case 0x0a: + length = spc_modesense_control(dev, &buf[offset]); + break; + case 0x3f: + length = spc_modesense_rwrecovery(&buf[offset]); + length += spc_modesense_caching(dev, &buf[offset+length]); + length += spc_modesense_control(dev, &buf[offset+length]); + break; + default: + pr_err("MODE SENSE: unimplemented page/subpage: 0x%02x/0x%02x\n", + cdb[2] & 0x3f, cdb[3]); + cmd->scsi_sense_reason = TCM_UNKNOWN_MODE_PAGE; + return -EINVAL; + } + offset += length; + + if (ten) { + offset -= 2; + buf[0] = (offset >> 8) & 0xff; + buf[1] = offset & 0xff; + + if ((cmd->se_lun->lun_access & TRANSPORT_LUNFLAGS_READ_ONLY) || + (cmd->se_deve && + (cmd->se_deve->lun_flags & TRANSPORT_LUNFLAGS_READ_ONLY))) + spc_modesense_write_protect(&buf[3], type); + + if ((dev->se_sub_dev->se_dev_attrib.emulate_write_cache > 0) && + (dev->se_sub_dev->se_dev_attrib.emulate_fua_write > 0)) + spc_modesense_dpofua(&buf[3], type); + + if ((offset + 2) > cmd->data_length) + offset = cmd->data_length; + + } else { + offset -= 1; + buf[0] = offset & 0xff; + + if ((cmd->se_lun->lun_access & TRANSPORT_LUNFLAGS_READ_ONLY) || + (cmd->se_deve && + (cmd->se_deve->lun_flags & TRANSPORT_LUNFLAGS_READ_ONLY))) + spc_modesense_write_protect(&buf[2], type); + + if ((dev->se_sub_dev->se_dev_attrib.emulate_write_cache > 0) && + (dev->se_sub_dev->se_dev_attrib.emulate_fua_write > 0)) + spc_modesense_dpofua(&buf[2], type); + + if ((offset + 1) > cmd->data_length) + offset = cmd->data_length; + } + + rbuf = transport_kmap_data_sg(cmd); + memcpy(rbuf, buf, offset); + transport_kunmap_data_sg(cmd); + + target_complete_cmd(cmd, GOOD); + return 0; +} + +static int spc_emulate_request_sense(struct se_cmd *cmd) +{ + unsigned char *cdb = cmd->t_task_cdb; + unsigned char *buf; + u8 ua_asc = 0, ua_ascq = 0; + int err = 0; + + if (cdb[1] & 0x01) { + pr_err("REQUEST_SENSE description emulation not" + " supported\n"); + cmd->scsi_sense_reason = TCM_INVALID_CDB_FIELD; + return -ENOSYS; + } + + buf = transport_kmap_data_sg(cmd); + + if (!core_scsi3_ua_clear_for_request_sense(cmd, &ua_asc, &ua_ascq)) { + /* + * CURRENT ERROR, UNIT ATTENTION + */ + buf[0] = 0x70; + buf[SPC_SENSE_KEY_OFFSET] = UNIT_ATTENTION; + + if (cmd->data_length < 18) { + buf[7] = 0x00; + err = -EINVAL; + goto end; + } + /* + * The Additional Sense Code (ASC) from the UNIT ATTENTION + */ + buf[SPC_ASC_KEY_OFFSET] = ua_asc; + buf[SPC_ASCQ_KEY_OFFSET] = ua_ascq; + buf[7] = 0x0A; + } else { + /* + * CURRENT ERROR, NO SENSE + */ + buf[0] = 0x70; + buf[SPC_SENSE_KEY_OFFSET] = NO_SENSE; + + if (cmd->data_length < 18) { + buf[7] = 0x00; + err = -EINVAL; + goto end; + } + /* + * NO ADDITIONAL SENSE INFORMATION + */ + buf[SPC_ASC_KEY_OFFSET] = 0x00; + buf[7] = 0x0A; + } + +end: + transport_kunmap_data_sg(cmd); + target_complete_cmd(cmd, GOOD); + return 0; +} + +static int spc_emulate_testunitready(struct se_cmd *cmd) +{ + target_complete_cmd(cmd, GOOD); + return 0; +} + +int spc_parse_cdb(struct se_cmd *cmd, unsigned int *size) { struct se_subsystem_dev *su_dev = cmd->se_dev->se_sub_dev; unsigned char *cdb = cmd->t_task_cdb; @@ -53,13 +952,11 @@ int spc_parse_cdb(struct se_cmd *cmd, unsigned int *size, bool passthrough) break; case MODE_SENSE: *size = cdb[4]; - if (!passthrough) - cmd->execute_cmd = target_emulate_modesense; + cmd->execute_cmd = spc_emulate_modesense; break; case MODE_SENSE_10: *size = (cdb[7] << 8) + cdb[8]; - if (!passthrough) - cmd->execute_cmd = target_emulate_modesense; + cmd->execute_cmd = spc_emulate_modesense; break; case LOG_SELECT: case LOG_SENSE: @@ -108,8 +1005,7 @@ int spc_parse_cdb(struct se_cmd *cmd, unsigned int *size, bool passthrough) break; case REQUEST_SENSE: *size = cdb[4]; - if (!passthrough) - cmd->execute_cmd = target_emulate_request_sense; + cmd->execute_cmd = spc_emulate_request_sense; break; case INQUIRY: *size = (cdb[3] << 8) + cdb[4]; @@ -120,8 +1016,7 @@ int spc_parse_cdb(struct se_cmd *cmd, unsigned int *size, bool passthrough) */ if (cmd->se_dev->dev_task_attr_type == SAM_TASK_ATTR_EMULATED) cmd->sam_task_attr = MSG_HEAD_TAG; - if (!passthrough) - cmd->execute_cmd = target_emulate_inquiry; + cmd->execute_cmd = spc_emulate_inquiry; break; case SECURITY_PROTOCOL_IN: case SECURITY_PROTOCOL_OUT: @@ -152,9 +1047,8 @@ int spc_parse_cdb(struct se_cmd *cmd, unsigned int *size, bool passthrough) cmd->sam_task_attr = MSG_HEAD_TAG; break; case TEST_UNIT_READY: + cmd->execute_cmd = spc_emulate_testunitready; *size = 0; - if (!passthrough) - cmd->execute_cmd = target_emulate_noop; break; default: pr_warn("TARGET_CORE[%s]: Unsupported SCSI Opcode" diff --git a/drivers/target/target_core_transport.c b/drivers/target/target_core_transport.c index 0adabd37cbb1..3a7fe21e4d23 100644 --- a/drivers/target/target_core_transport.c +++ b/drivers/target/target_core_transport.c @@ -1343,7 +1343,7 @@ static inline void transport_generic_prepare_cdb( } } -static int target_cmd_size_check(struct se_cmd *cmd, unsigned int size) +int target_cmd_size_check(struct se_cmd *cmd, unsigned int size) { struct se_device *dev = cmd->se_dev; @@ -1469,7 +1469,6 @@ int target_setup_cmd_from_cdb( u32 pr_reg_type = 0; u8 alua_ascq = 0; unsigned long flags; - unsigned int size; int ret; transport_generic_prepare_cdb(cdb); @@ -1561,11 +1560,7 @@ int target_setup_cmd_from_cdb( */ } - ret = cmd->se_dev->transport->parse_cdb(cmd, &size); - if (ret < 0) - return ret; - - ret = target_cmd_size_check(cmd, size); + ret = cmd->se_dev->transport->parse_cdb(cmd); if (ret < 0) return ret; @@ -2163,32 +2158,6 @@ out: return -1; } -static inline long long transport_dev_end_lba(struct se_device *dev) -{ - return dev->transport->get_blocks(dev) + 1; -} - -static int transport_cmd_get_valid_sectors(struct se_cmd *cmd) -{ - struct se_device *dev = cmd->se_dev; - u32 sectors; - - if (dev->transport->get_device_type(dev) != TYPE_DISK) - return 0; - - sectors = (cmd->data_length / dev->se_sub_dev->se_dev_attrib.block_size); - - if ((cmd->t_task_lba + sectors) > transport_dev_end_lba(dev)) { - pr_err("LBA: %llu Sectors: %u exceeds" - " transport_dev_end_lba(): %llu\n", - cmd->t_task_lba, sectors, - transport_dev_end_lba(dev)); - return -EINVAL; - } - - return 0; -} - /* * Called from I/O completion to determine which dormant/delayed * and ordered cmds need to have their tasks added to the execution queue. @@ -2632,7 +2601,6 @@ out: */ int transport_generic_new_cmd(struct se_cmd *cmd) { - struct se_device *dev = cmd->se_dev; int ret = 0; /* @@ -2666,17 +2634,6 @@ int transport_generic_new_cmd(struct se_cmd *cmd) return 0; } - if (cmd->se_cmd_flags & SCF_SCSI_DATA_CDB) { - struct se_dev_attrib *attr = &dev->se_sub_dev->se_dev_attrib; - - if (transport_cmd_get_valid_sectors(cmd) < 0) - return -EINVAL; - - BUG_ON(cmd->data_length % attr->block_size); - BUG_ON(DIV_ROUND_UP(cmd->data_length, attr->block_size) > - attr->hw_max_sectors); - } - atomic_inc(&cmd->t_fe_count); /* diff --git a/include/target/target_core_backend.h b/include/target/target_core_backend.h index f4f1eef6bf55..24d2004f0d12 100644 --- a/include/target/target_core_backend.h +++ b/include/target/target_core_backend.h @@ -25,7 +25,7 @@ struct se_subsystem_api { void (*free_device)(void *); int (*transport_complete)(struct se_cmd *cmd, struct scatterlist *); - int (*parse_cdb)(struct se_cmd *cmd, unsigned int *size); + int (*parse_cdb)(struct se_cmd *cmd); int (*execute_cmd)(struct se_cmd *, struct scatterlist *, u32, enum dma_data_direction); int (*do_discard)(struct se_device *, sector_t, u32); @@ -51,8 +51,8 @@ struct se_device *transport_add_device_to_core_hba(struct se_hba *, void target_complete_cmd(struct se_cmd *, u8); -int sbc_parse_cdb(struct se_cmd *cmd, unsigned int *size); -int spc_parse_cdb(struct se_cmd *cmd, unsigned int *size, bool passthrough); +int sbc_parse_cdb(struct se_cmd *cmd); +int spc_parse_cdb(struct se_cmd *cmd, unsigned int *size); void transport_set_vpd_proto_id(struct t10_vpd *, unsigned char *); int transport_set_vpd_assoc(struct t10_vpd *, unsigned char *); |