diff options
Diffstat (limited to 'drivers/target/target_core_spc.c')
| -rw-r--r-- | drivers/target/target_core_spc.c | 1674 |
1 files changed, 1415 insertions, 259 deletions
diff --git a/drivers/target/target_core_spc.c b/drivers/target/target_core_spc.c index 4cb667d720a7..fe2b888bcb43 100644 --- a/drivers/target/target_core_spc.c +++ b/drivers/target/target_core_spc.c @@ -1,30 +1,18 @@ +// SPDX-License-Identifier: GPL-2.0-or-later /* * SCSI Primary Commands (SPC) parsing and emulation. * - * (c) Copyright 2002-2012 RisingTide Systems LLC. + * (c) Copyright 2002-2013 Datera, Inc. * * 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 <linux/unaligned.h> -#include <scsi/scsi.h> +#include <scsi/scsi_proto.h> +#include <scsi/scsi_common.h> #include <scsi/scsi_tcq.h> #include <target/target_core_base.h> @@ -35,12 +23,11 @@ #include "target_core_alua.h" #include "target_core_pr.h" #include "target_core_ua.h" +#include "target_core_xcopy.h" - -static void spc_fill_alua_data(struct se_port *port, unsigned char *buf) +static void spc_fill_alua_data(struct se_lun *lun, 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. @@ -48,35 +35,52 @@ static void spc_fill_alua_data(struct se_port *port, unsigned char *buf) buf[5] = 0x80; /* - * Set TPGS field for explict and/or implict ALUA access type + * Set TPGS field for explicit and/or implicit 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; + rcu_read_lock(); + tg_pt_gp = rcu_dereference(lun->lun_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); + rcu_read_unlock(); +} + +static u16 +spc_find_scsi_transport_vd(int proto_id) +{ + switch (proto_id) { + case SCSI_PROTOCOL_FCP: + return SCSI_VERSION_DESCRIPTOR_FCP4; + case SCSI_PROTOCOL_ISCSI: + return SCSI_VERSION_DESCRIPTOR_ISCSI; + case SCSI_PROTOCOL_SAS: + return SCSI_VERSION_DESCRIPTOR_SAS3; + case SCSI_PROTOCOL_SBP: + return SCSI_VERSION_DESCRIPTOR_SBP3; + case SCSI_PROTOCOL_SRP: + return SCSI_VERSION_DESCRIPTOR_SRP; + default: + pr_warn("Cannot find VERSION DESCRIPTOR value for unknown SCSI" + " transport PROTOCOL IDENTIFIER %#x\n", proto_id); + return 0; + } } sense_reason_t spc_emulate_inquiry_std(struct se_cmd *cmd, unsigned char *buf) { struct se_lun *lun = cmd->se_lun; + struct se_portal_group *tpg = lun->lun_tpg; struct se_device *dev = cmd->se_dev; + struct se_session *sess = cmd->se_sess; /* Set RMB (removable media) for tape devices */ if (dev->transport->get_device_type(dev) == TYPE_TAPE) buf[1] = 0x80; - buf[2] = 0x05; /* SPC-3 */ + buf[2] = 0x06; /* SPC-4 */ /* * NORMACA and HISUP = 0, RESPONSE DATA FORMAT = 2 @@ -93,14 +97,56 @@ spc_emulate_inquiry_std(struct se_cmd *cmd, unsigned char *buf) /* * Enable SCCS and TPGS fields for Emulated ALUA */ - spc_fill_alua_data(lun->lun_sep, buf); + spc_fill_alua_data(lun, buf); + + /* + * Set Third-Party Copy (3PC) bit to indicate support for EXTENDED_COPY + */ + if (dev->dev_attrib.emulate_3pc) + buf[5] |= 0x8; + /* + * Set Protection (PROTECT) bit when DIF has been enabled on the + * device, and the fabric supports VERIFY + PASS. Also report + * PROTECT=1 if sess_prot_type has been configured to allow T10-PI + * to unprotected devices. + */ + if (sess->sup_prot_ops & (TARGET_PROT_DIN_PASS | TARGET_PROT_DOUT_PASS)) { + if (dev->dev_attrib.pi_prot_type || cmd->se_sess->sess_prot_type) + buf[5] |= 0x1; + } + + /* + * Set MULTIP bit to indicate presence of multiple SCSI target ports + */ + if (dev->export_count > 1) + buf[6] |= 0x10; buf[7] = 0x2; /* CmdQue=1 */ - snprintf(&buf[8], 8, "LIO-ORG"); - snprintf(&buf[16], 16, "%s", dev->t10_wwn.model); - snprintf(&buf[32], 4, "%s", dev->t10_wwn.revision); - buf[4] = 31; /* Set additional length to 31 */ + /* + * ASCII data fields described as being left-aligned shall have any + * unused bytes at the end of the field (i.e., highest offset) and the + * unused bytes shall be filled with ASCII space characters (20h). + */ + memset(&buf[8], 0x20, + INQUIRY_VENDOR_LEN + INQUIRY_MODEL_LEN + INQUIRY_REVISION_LEN); + memcpy(&buf[8], dev->t10_wwn.vendor, + strnlen(dev->t10_wwn.vendor, INQUIRY_VENDOR_LEN)); + memcpy(&buf[16], dev->t10_wwn.model, + strnlen(dev->t10_wwn.model, INQUIRY_MODEL_LEN)); + memcpy(&buf[32], dev->t10_wwn.revision, + strnlen(dev->t10_wwn.revision, INQUIRY_REVISION_LEN)); + + /* + * Set the VERSION DESCRIPTOR fields + */ + put_unaligned_be16(SCSI_VERSION_DESCRIPTOR_SAM5, &buf[58]); + put_unaligned_be16(spc_find_scsi_transport_vd(tpg->proto_id), &buf[60]); + put_unaligned_be16(SCSI_VERSION_DESCRIPTOR_SPC4, &buf[62]); + if (cmd->se_dev->transport->get_device_type(dev) == TYPE_DISK) + put_unaligned_be16(SCSI_VERSION_DESCRIPTOR_SBC3, &buf[64]); + + buf[4] = 91; /* Set additional length to 91 */ return 0; } @@ -111,29 +157,39 @@ static sense_reason_t spc_emulate_evpd_80(struct se_cmd *cmd, unsigned char *buf) { struct se_device *dev = cmd->se_dev; - u16 len = 0; + u16 len; if (dev->dev_flags & DF_EMULATED_VPD_UNIT_SERIAL) { - u32 unit_serial_len; - - unit_serial_len = strlen(dev->t10_wwn.unit_serial); - unit_serial_len++; /* For NULL Terminator */ - - len += sprintf(&buf[4], "%s", dev->t10_wwn.unit_serial); + len = sprintf(&buf[4], "%s", 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) +/* + * Generate NAA IEEE Registered Extended designator + */ +void spc_gen_naa_6h_vendor_specific(struct se_device *dev, + unsigned char *buf) { unsigned char *p = &dev->t10_wwn.unit_serial[0]; - int cnt; + u32 company_id = dev->t10_wwn.company_id; + int cnt, off = 0; bool next = true; /* + * Start NAA IEEE Registered Extended Identifier/Designator + */ + buf[off] = 0x6 << 4; + + /* IEEE COMPANY_ID */ + buf[off++] |= (company_id >> 20) & 0xf; + buf[off++] = (company_id >> 12) & 0xff; + buf[off++] = (company_id >> 4) & 0xff; + buf[off] = (company_id & 0xf) << 4; + + /* * 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 @@ -141,7 +197,7 @@ static void spc_parse_naa_6h_vendor_specific(struct se_device *dev, * NUMBER set via vpd_unit_serial in target_core_configfs.c to ensure * per device uniqeness. */ - for (cnt = 0; *p && cnt < 13; p++) { + for (cnt = off + 13; *p && off < cnt; p++) { int val = hex_to_bin(*p); if (val < 0) @@ -149,10 +205,10 @@ static void spc_parse_naa_6h_vendor_specific(struct se_device *dev, if (next) { next = false; - buf[cnt++] |= val; + buf[off++] |= val; } else { next = true; - buf[cnt] = val << 4; + buf[off] = val << 4; } } } @@ -166,14 +222,11 @@ 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->t10_wwn.model[0]; - u32 prod_len; - u32 unit_serial_len, off = 0; + u32 off = 0; u16 len = 0, id_len; off = 4; @@ -202,24 +255,8 @@ spc_emulate_evpd_83(struct se_cmd *cmd, unsigned char *buf) /* 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]); + /* NAA IEEE Registered Extended designator */ + spc_gen_naa_6h_vendor_specific(dev, &buf[off]); len = 20; off = (len + 4); @@ -229,22 +266,17 @@ 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->dev_flags & DF_EMULATED_VPD_UNIT_SERIAL) { - unit_serial_len = strlen(&dev->t10_wwn.unit_serial[0]); - unit_serial_len++; /* For NULL Terminator */ + if (dev->dev_flags & DF_EMULATED_VPD_UNIT_SERIAL) id_len += sprintf(&buf[off+12], "%s:%s", prod, &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); + /* left align Vendor ID and pad with spaces */ + memset(&buf[off+4], 0x20, INQUIRY_VENDOR_LEN); + memcpy(&buf[off+4], dev->t10_wwn.vendor, + strnlen(dev->t10_wwn.vendor, INQUIRY_VENDOR_LEN)); /* Extra Byte for NULL Terminator */ id_len++; /* Identifier Length */ @@ -252,18 +284,15 @@ check_t10_vend_desc: /* 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) { + + if (1) { struct t10_alua_lu_gp *lu_gp; - u32 padding, scsi_name_len; + u32 padding, scsi_name_len, scsi_target_len; u16 lu_gp_id = 0; u16 tg_pt_gp_id = 0; u16 tpgt; - tpg = port->sep_tpg; + tpg = lun->lun_tpg; /* * Relative target port identifer, see spc4r17 * section 7.7.3.7 @@ -271,8 +300,7 @@ check_t10_vend_desc: * 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] = tpg->proto_id << 4; buf[off++] |= 0x1; /* CODE SET == Binary */ buf[off] = 0x80; /* Set PIV=1 */ /* Set ASSOCIATION == target port: 01b */ @@ -284,8 +312,8 @@ check_t10_vend_desc: /* 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); + put_unaligned_be16(lun->lun_tpg->tpg_rtpi, &buf[off]); + off += 2; len += 8; /* Header size + Designation descriptor */ /* * Target port group identifier, see spc4r17 @@ -294,21 +322,16 @@ check_t10_vend_desc: * Get the PROTOCOL IDENTIFIER as defined by spc4r17 * section 7.5.1 Table 362 */ - 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; + rcu_read_lock(); + tg_pt_gp = rcu_dereference(lun->lun_tg_pt_gp); if (!tg_pt_gp) { - spin_unlock(&tg_pt_gp_mem->tg_pt_gp_mem_lock); + rcu_read_unlock(); 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); + rcu_read_unlock(); - buf[off] = - (tpg->se_tpg_tfo->get_fabric_proto_ident(tpg) << 4); + buf[off] = tpg->proto_id << 4; buf[off++] |= 0x1; /* CODE SET == Binary */ buf[off] = 0x80; /* Set PIV=1 */ /* Set ASSOCIATION == target port: 01b */ @@ -318,8 +341,8 @@ check_t10_vend_desc: 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); + put_unaligned_be16(tg_pt_gp_id, &buf[off]); + off += 2; len += 8; /* Header size + Designation descriptor */ /* * Logical Unit Group identifier, see spc4r17 @@ -345,8 +368,8 @@ check_lu_gp: 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); + put_unaligned_be16(lu_gp_id, &buf[off]); + off += 2; len += 8; /* Header size + Designation descriptor */ /* * SCSI name string designator, see spc4r17 @@ -356,18 +379,7 @@ check_lu_gp: * 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] = tpg->proto_id << 4; buf[off++] |= 0x3; /* CODE SET == UTF-8 */ buf[off] = 0x80; /* Set PIV=1 */ /* Set ASSOCIATION == target port: 01b */ @@ -393,46 +405,101 @@ check_scsi_name: * shall be no larger than 256 and shall be a multiple * of four. */ + padding = ((-scsi_name_len) & 3); if (padding) scsi_name_len += padding; + if (scsi_name_len > 256) + scsi_name_len = 256; 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; -} -EXPORT_SYMBOL(spc_emulate_evpd_83); -static bool -spc_check_dev_wce(struct se_device *dev) -{ - bool wce = false; + /* + * Target device designator + */ + buf[off] = tpg->proto_id << 4; + buf[off++] |= 0x3; /* CODE SET == UTF-8 */ + buf[off] = 0x80; /* Set PIV=1 */ + /* Set ASSOCIATION == target device: 10b */ + buf[off] |= 0x20; + /* 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>" in + * UTF-8 encoding. + */ + scsi_target_len = sprintf(&buf[off], "%s", + tpg->se_tpg_tfo->tpg_get_wwn(tpg)); + scsi_target_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. + */ + padding = ((-scsi_target_len) & 3); + if (padding) + scsi_target_len += padding; + if (scsi_target_len > 256) + scsi_target_len = 256; - if (dev->transport->get_write_cache) - wce = dev->transport->get_write_cache(dev); - else if (dev->dev_attrib.emulate_write_cache > 0) - wce = true; + buf[off-1] = scsi_target_len; + off += scsi_target_len; - return wce; + /* Header size + Designation descriptor */ + len += (scsi_target_len + 4); + } + put_unaligned_be16(len, &buf[2]); /* Page Length for VPD 0x83 */ + return 0; } +EXPORT_SYMBOL(spc_emulate_evpd_83); /* Extended INQUIRY Data VPD Page */ static sense_reason_t spc_emulate_evpd_86(struct se_cmd *cmd, unsigned char *buf) { struct se_device *dev = cmd->se_dev; + struct se_session *sess = cmd->se_sess; buf[3] = 0x3c; + /* + * Set GRD_CHK + REF_CHK for TYPE1 protection, or GRD_CHK + * only for TYPE3 protection. + */ + if (sess->sup_prot_ops & (TARGET_PROT_DIN_PASS | TARGET_PROT_DOUT_PASS)) { + if (dev->dev_attrib.pi_prot_type == TARGET_DIF_TYPE1_PROT || + cmd->se_sess->sess_prot_type == TARGET_DIF_TYPE1_PROT) + buf[4] = 0x5; + else if (dev->dev_attrib.pi_prot_type == TARGET_DIF_TYPE3_PROT || + cmd->se_sess->sess_prot_type == TARGET_DIF_TYPE3_PROT) + buf[4] = 0x4; + } + + /* logical unit supports type 1 and type 3 protection */ + if ((dev->transport->get_device_type(dev) == TYPE_DISK) && + (sess->sup_prot_ops & (TARGET_PROT_DIN_PASS | TARGET_PROT_DOUT_PASS)) && + (dev->dev_attrib.pi_prot_type || cmd->se_sess->sess_prot_type)) { + buf[4] |= (0x3 << 3); + } + /* Set HEADSUP, ORDSUP, SIMPSUP */ buf[5] = 0x07; /* If WriteCache emulation is enabled, set V_SUP */ - if (spc_check_dev_wce(dev)) + if (target_check_wce(dev)) buf[6] = 0x01; + /* If an LBA map is present set R_SUP */ + spin_lock(&cmd->se_dev->t10_alua.lba_map_lock); + if (!list_empty(&dev->t10_alua.lba_map_list)) + buf[8] = 0x10; + spin_unlock(&cmd->se_dev->t10_alua.lba_map_lock); return 0; } @@ -441,8 +508,9 @@ static sense_reason_t 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; + u32 mtl = 0; + int have_tp = 0, opt, min; + u32 io_max_blocks; /* * Following spc3r22 section 6.5.3 Block Limits VPD page, when @@ -453,33 +521,50 @@ spc_emulate_evpd_b0(struct se_cmd *cmd, unsigned char *buf) 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 MAXIMUM COMPARE AND WRITE LENGTH + */ + if (dev->dev_attrib.emulate_caw) + buf[5] = 0x01; /* * Set OPTIMAL TRANSFER LENGTH GRANULARITY */ - put_unaligned_be16(1, &buf[6]); + if (dev->transport->get_io_min && (min = dev->transport->get_io_min(dev))) + put_unaligned_be16(min / dev->dev_attrib.block_size, &buf[6]); + else + put_unaligned_be16(1, &buf[6]); /* * Set MAXIMUM TRANSFER LENGTH + * + * XXX: Currently assumes single PAGE_SIZE per scatterlist for fabrics + * enforcing maximum HW scatter-gather-list entry limit */ - max_sectors = min(dev->dev_attrib.fabric_max_sectors, - dev->dev_attrib.hw_max_sectors); - put_unaligned_be32(max_sectors, &buf[8]); + if (cmd->se_tfo->max_data_sg_nents) { + mtl = (cmd->se_tfo->max_data_sg_nents * PAGE_SIZE) / + dev->dev_attrib.block_size; + } + io_max_blocks = mult_frac(dev->dev_attrib.hw_max_sectors, + dev->dev_attrib.hw_block_size, + dev->dev_attrib.block_size); + put_unaligned_be32(min_not_zero(mtl, io_max_blocks), &buf[8]); /* * Set OPTIMAL TRANSFER LENGTH */ - put_unaligned_be32(dev->dev_attrib.optimal_sectors, &buf[12]); + if (dev->transport->get_io_opt && (opt = dev->transport->get_io_opt(dev))) + put_unaligned_be32(opt / dev->dev_attrib.block_size, &buf[12]); + else + put_unaligned_be32(dev->dev_attrib.optimal_sectors, &buf[12]); + + put_unaligned_be16(12, &buf[2]); - /* - * Exit now if we don't support TP. - */ if (!have_tp) - goto max_write_same; + goto try_atomic; /* * Set MAXIMUM UNMAP LBA COUNT @@ -508,9 +593,29 @@ spc_emulate_evpd_b0(struct se_cmd *cmd, unsigned char *buf) /* * MAXIMUM WRITE SAME LENGTH */ -max_write_same: put_unaligned_be64(dev->dev_attrib.max_write_same_len, &buf[36]); + put_unaligned_be16(40, &buf[2]); + +try_atomic: + /* + * ATOMIC + */ + if (!dev->dev_attrib.atomic_max_len) + goto done; + + if (dev->dev_attrib.atomic_max_len < io_max_blocks) + put_unaligned_be32(dev->dev_attrib.atomic_max_len, &buf[44]); + else + put_unaligned_be32(io_max_blocks, &buf[44]); + + put_unaligned_be32(dev->dev_attrib.atomic_alignment, &buf[48]); + put_unaligned_be32(dev->dev_attrib.atomic_granularity, &buf[52]); + put_unaligned_be32(dev->dev_attrib.atomic_max_with_boundary, &buf[56]); + put_unaligned_be32(dev->dev_attrib.atomic_max_boundary, &buf[60]); + + put_unaligned_be16(60, &buf[2]); +done: return 0; } @@ -574,7 +679,33 @@ spc_emulate_evpd_b2(struct se_cmd *cmd, unsigned char *buf) * support the use of the WRITE SAME (16) command to unmap LBAs. */ if (dev->dev_attrib.emulate_tpws != 0) - buf[5] |= 0x40; + buf[5] |= 0x40 | 0x20; + + /* + * The unmap_zeroes_data set means that the underlying device supports + * REQ_OP_DISCARD and has the discard_zeroes_data bit set. This + * satisfies the SBC requirements for LBPRZ, meaning that a subsequent + * read will return zeroes after an UNMAP or WRITE SAME (16) to an LBA + * See sbc4r36 6.6.4. + */ + if (((dev->dev_attrib.emulate_tpu != 0) || + (dev->dev_attrib.emulate_tpws != 0)) && + (dev->dev_attrib.unmap_zeroes_data != 0)) + buf[5] |= 0x04; + + return 0; +} + +/* Referrals VPD page */ +static sense_reason_t +spc_emulate_evpd_b3(struct se_cmd *cmd, unsigned char *buf) +{ + struct se_device *dev = cmd->se_dev; + + buf[0] = dev->transport->get_device_type(dev); + buf[3] = 0x0c; + put_unaligned_be32(dev->t10_alua.lba_map_segment_size, &buf[8]); + put_unaligned_be32(dev->t10_alua.lba_map_segment_multiplier, &buf[12]); return 0; } @@ -593,6 +724,7 @@ static struct { { .page = 0xb0, .emulate = spc_emulate_evpd_b0 }, { .page = 0xb1, .emulate = spc_emulate_evpd_b1 }, { .page = 0xb2, .emulate = spc_emulate_evpd_b2 }, + { .page = 0xb3, .emulate = spc_emulate_evpd_b3 }, }; /* supported vital product data pages */ @@ -619,19 +751,20 @@ static sense_reason_t 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 *rbuf; unsigned char *cdb = cmd->t_task_cdb; - unsigned char buf[SE_INQUIRY_BUF]; + unsigned char *buf; sense_reason_t ret; int p; + int len = 0; - memset(buf, 0, SE_INQUIRY_BUF); + buf = kzalloc(SE_INQUIRY_BUF, GFP_KERNEL); + if (!buf) { + pr_err("Unable to allocate response buffer for INQUIRY\n"); + return TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; + } - if (dev == tpg->tpg_virt_lun0.lun_se_dev) - buf[0] = 0x3f; /* Not connected */ - else - buf[0] = dev->transport->get_device_type(dev); + buf[0] = dev->transport->get_device_type(dev); if (!(cdb[1] & 0x1)) { if (cdb[2]) { @@ -642,6 +775,7 @@ spc_emulate_inquiry(struct se_cmd *cmd) } ret = spc_emulate_inquiry_std(cmd, buf); + len = buf[4] + 5; goto out; } @@ -649,26 +783,28 @@ spc_emulate_inquiry(struct se_cmd *cmd) if (cdb[2] == evpd_handlers[p].page) { buf[1] = cdb[2]; ret = evpd_handlers[p].emulate(cmd, buf); + len = get_unaligned_be16(&buf[2]) + 4; goto out; } } - pr_err("Unknown VPD Code: 0x%02x\n", cdb[2]); + pr_debug("Unknown VPD Code: 0x%02x\n", cdb[2]); ret = TCM_INVALID_CDB_FIELD; out: rbuf = transport_kmap_data_sg(cmd); if (rbuf) { - memcpy(rbuf, buf, min_t(u32, sizeof(buf), cmd->data_length)); + memcpy(rbuf, buf, min_t(u32, SE_INQUIRY_BUF, cmd->data_length)); transport_kunmap_data_sg(cmd); } + kfree(buf); if (!ret) - target_complete_cmd(cmd, GOOD); + target_complete_cmd_with_length(cmd, SAM_STAT_GOOD, len); return ret; } -static int spc_modesense_rwrecovery(struct se_device *dev, u8 pc, u8 *p) +static int spc_modesense_rwrecovery(struct se_cmd *cmd, u8 pc, u8 *p) { p[0] = 0x01; p[1] = 0x0a; @@ -681,8 +817,11 @@ out: return 12; } -static int spc_modesense_control(struct se_device *dev, u8 pc, u8 *p) +static int spc_modesense_control(struct se_cmd *cmd, u8 pc, u8 *p) { + struct se_device *dev = cmd->se_dev; + struct se_session *sess = cmd->se_sess; + p[0] = 0x0a; p[1] = 0x0a; @@ -690,7 +829,12 @@ static int spc_modesense_control(struct se_device *dev, u8 pc, u8 *p) if (pc == 1) goto out; - p[2] = 2; + /* GLTSD: No implicit save of log parameters */ + p[2] = (1 << 1); + if (target_sense_desc_format(dev)) + /* D_SENSE: Descriptor format sense data for 64bit sectors */ + p[2] |= (1 << 2); + /* * From spc4r23, 7.4.7 Control mode page * @@ -749,8 +893,17 @@ static int spc_modesense_control(struct se_device *dev, u8 pc, u8 *p) * 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->dev_attrib.emulate_ua_intlck_ctrl == 2) ? 0x30 : - (dev->dev_attrib.emulate_ua_intlck_ctrl == 1) ? 0x20 : 0x00; + switch (dev->dev_attrib.emulate_ua_intlck_ctrl) { + case TARGET_UA_INTLCK_CTRL_ESTABLISH_UA: + p[4] = 0x30; + break; + case TARGET_UA_INTLCK_CTRL_NO_CLEAR: + p[4] = 0x20; + break; + default: /* TARGET_UA_INTLCK_CTRL_CLEAR */ + p[4] = 0x00; + break; + } /* * From spc4r17, section 7.4.6 Control mode Page * @@ -764,6 +917,21 @@ static int spc_modesense_control(struct se_device *dev, u8 pc, u8 *p) * status (see SAM-4). */ p[5] = (dev->dev_attrib.emulate_tas) ? 0x40 : 0x00; + /* + * From spc4r30, section 7.5.7 Control mode page + * + * Application Tag Owner (ATO) bit set to one. + * + * If the ATO bit is set to one the device server shall not modify the + * LOGICAL BLOCK APPLICATION TAG field and, depending on the protection + * type, shall not modify the contents of the LOGICAL BLOCK REFERENCE + * TAG field. + */ + if (sess->sup_prot_ops & (TARGET_PROT_DIN_PASS | TARGET_PROT_DOUT_PASS)) { + if (dev->dev_attrib.pi_prot_type || sess->sess_prot_type) + p[5] |= 0x80; + } + p[8] = 0xff; p[9] = 0xff; p[11] = 30; @@ -772,8 +940,10 @@ out: return 12; } -static int spc_modesense_caching(struct se_device *dev, u8 pc, u8 *p) +static int spc_modesense_caching(struct se_cmd *cmd, u8 pc, u8 *p) { + struct se_device *dev = cmd->se_dev; + p[0] = 0x08; p[1] = 0x12; @@ -781,7 +951,7 @@ static int spc_modesense_caching(struct se_device *dev, u8 pc, u8 *p) if (pc == 1) goto out; - if (spc_check_dev_wce(dev)) + if (target_check_wce(dev)) p[2] = 0x04; /* Write Cache Enable */ p[12] = 0x20; /* Disabled Read Ahead */ @@ -789,7 +959,7 @@ out: return 20; } -static int spc_modesense_informational_exceptions(struct se_device *dev, u8 pc, unsigned char *p) +static int spc_modesense_informational_exceptions(struct se_cmd *cmd, u8 pc, unsigned char *p) { p[0] = 0x1c; p[1] = 0x0a; @@ -805,7 +975,7 @@ out: static struct { uint8_t page; uint8_t subpage; - int (*emulate)(struct se_device *, u8, unsigned char *); + int (*emulate)(struct se_cmd *, u8, unsigned char *); } modesense_handlers[] = { { .page = 0x01, .subpage = 0x00, .emulate = spc_modesense_rwrecovery }, { .page = 0x08, .subpage = 0x00, .emulate = spc_modesense_caching }, @@ -888,13 +1058,15 @@ static sense_reason_t spc_emulate_modesense(struct se_cmd *cmd) length = ten ? 3 : 2; /* DEVICE-SPECIFIC PARAMETER */ - if ((cmd->se_lun->lun_access & TRANSPORT_LUNFLAGS_READ_ONLY) || - (cmd->se_deve && - (cmd->se_deve->lun_flags & TRANSPORT_LUNFLAGS_READ_ONLY))) + if (cmd->se_lun->lun_access_ro || target_lun_is_rdonly(cmd)) spc_modesense_write_protect(&buf[length], type); - if ((spc_check_dev_wce(dev)) && - (dev->dev_attrib.emulate_fua_write > 0)) + /* + * SBC only allows us to enable FUA and DPO together. Fortunately + * DPO is explicitly specified as a hint, so a noop is a perfectly + * valid implementation. + */ + if (target_check_fua(dev)) spc_modesense_dpofua(&buf[length], type); ++length; @@ -943,7 +1115,7 @@ static sense_reason_t spc_emulate_modesense(struct se_cmd *cmd) * the only two possibilities). */ if ((modesense_handlers[i].subpage & ~subpage) == 0) { - ret = modesense_handlers[i].emulate(dev, pc, &buf[length]); + ret = modesense_handlers[i].emulate(cmd, pc, &buf[length]); if (!ten && length + ret >= 255) break; length += ret; @@ -956,7 +1128,7 @@ static sense_reason_t spc_emulate_modesense(struct se_cmd *cmd) for (i = 0; i < ARRAY_SIZE(modesense_handlers); ++i) if (modesense_handlers[i].page == page && modesense_handlers[i].subpage == subpage) { - length += modesense_handlers[i].emulate(dev, pc, &buf[length]); + length += modesense_handlers[i].emulate(cmd, pc, &buf[length]); goto set_length; } @@ -982,13 +1154,12 @@ set_length: transport_kunmap_data_sg(cmd); } - target_complete_cmd(cmd, GOOD); + target_complete_cmd_with_length(cmd, SAM_STAT_GOOD, length); return 0; } static sense_reason_t spc_emulate_modeselect(struct se_cmd *cmd) { - struct se_device *dev = cmd->se_dev; char *cdb = cmd->t_task_cdb; bool ten = cdb[0] == MODE_SELECT_10; int off = ten ? 8 : 4; @@ -997,11 +1168,11 @@ static sense_reason_t spc_emulate_modeselect(struct se_cmd *cmd) unsigned char *buf; unsigned char tbuf[SE_MODE_PAGE_BUF]; int length; - int ret = 0; + sense_reason_t ret = 0; int i; if (!cmd->data_length) { - target_complete_cmd(cmd, GOOD); + target_complete_cmd(cmd, SAM_STAT_GOOD); return 0; } @@ -1024,7 +1195,7 @@ static sense_reason_t spc_emulate_modeselect(struct se_cmd *cmd) if (modesense_handlers[i].page == page && modesense_handlers[i].subpage == subpage) { memset(tbuf, 0, SE_MODE_PAGE_BUF); - length = modesense_handlers[i].emulate(dev, 0, tbuf); + length = modesense_handlers[i].emulate(cmd, 0, tbuf); goto check_contents; } @@ -1044,7 +1215,7 @@ out: transport_kunmap_data_sg(cmd); if (!ret) - target_complete_cmd(cmd, GOOD); + target_complete_cmd(cmd, SAM_STAT_GOOD); return ret; } @@ -1054,6 +1225,7 @@ static sense_reason_t spc_emulate_request_sense(struct se_cmd *cmd) unsigned char *rbuf; u8 ua_asc = 0, ua_ascq = 0; unsigned char buf[SE_SENSE_BUF]; + bool desc_format = target_sense_desc_format(cmd->se_dev); memset(buf, 0, SE_SENSE_BUF); @@ -1067,37 +1239,16 @@ static sense_reason_t spc_emulate_request_sense(struct se_cmd *cmd) if (!rbuf) return TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; - 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; - - /* - * 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; - - /* - * NO ADDITIONAL SENSE INFORMATION - */ - buf[SPC_ASC_KEY_OFFSET] = 0x00; - buf[7] = 0x0A; - } + if (!core_scsi3_ua_clear_for_request_sense(cmd, &ua_asc, &ua_ascq)) + scsi_build_sense_buffer(desc_format, buf, UNIT_ATTENTION, + ua_asc, ua_ascq); + else + scsi_build_sense_buffer(desc_format, buf, NO_SENSE, 0x0, 0x0); memcpy(rbuf, buf, min_t(u32, sizeof(buf), cmd->data_length)); transport_kunmap_data_sg(cmd); - target_complete_cmd(cmd, GOOD); + target_complete_cmd(cmd, SAM_STAT_GOOD); return 0; } @@ -1105,17 +1256,14 @@ sense_reason_t spc_emulate_report_luns(struct se_cmd *cmd) { struct se_dev_entry *deve; struct se_session *sess = cmd->se_sess; + struct se_node_acl *nacl; + struct scsi_lun slun; unsigned char *buf; - u32 lun_count = 0, offset = 8, i; - - if (cmd->data_length < 16) { - pr_warn("REPORT LUNS allocation length %u too small\n", - cmd->data_length); - return TCM_INVALID_CDB_FIELD; - } + u32 lun_count = 0, offset = 8; + __be32 len; buf = transport_kmap_data_sg(cmd); - if (!buf) + if (cmd->data_length && !buf) return TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; /* @@ -1123,43 +1271,51 @@ sense_reason_t spc_emulate_report_luns(struct se_cmd *cmd) * coming via a target_core_mod PASSTHROUGH op, and not through * a $FABRIC_MOD. In that case, report LUN=0 only. */ - if (!sess) { - int_to_scsilun(0, (struct scsi_lun *)&buf[offset]); - lun_count = 1; + if (!sess) goto done; - } - spin_lock_irq(&sess->se_node_acl->device_list_lock); - for (i = 0; i < TRANSPORT_MAX_LUNS_PER_TPG; i++) { - deve = sess->se_node_acl->device_list[i]; - if (!(deve->lun_flags & TRANSPORT_LUNFLAGS_INITIATOR_ACCESS)) - continue; + nacl = sess->se_node_acl; + + rcu_read_lock(); + hlist_for_each_entry_rcu(deve, &nacl->lun_entry_hlist, link) { /* * We determine the correct LUN LIST LENGTH even once we * have reached the initial allocation length. * See SPC2-R20 7.19. */ lun_count++; - if ((offset + 8) > cmd->data_length) + if (offset >= cmd->data_length) continue; - int_to_scsilun(deve->mapped_lun, (struct scsi_lun *)&buf[offset]); + int_to_scsilun(deve->mapped_lun, &slun); + memcpy(buf + offset, &slun, + min(8u, cmd->data_length - offset)); offset += 8; } - spin_unlock_irq(&sess->se_node_acl->device_list_lock); + rcu_read_unlock(); /* * See SPC3 r07, page 159. */ done: - lun_count *= 8; - buf[0] = ((lun_count >> 24) & 0xff); - buf[1] = ((lun_count >> 16) & 0xff); - buf[2] = ((lun_count >> 8) & 0xff); - buf[3] = (lun_count & 0xff); - transport_kunmap_data_sg(cmd); + /* + * If no LUNs are accessible, report virtual LUN 0. + */ + if (lun_count == 0) { + int_to_scsilun(0, &slun); + if (cmd->data_length > 8) + memcpy(buf + offset, &slun, + min(8u, cmd->data_length - offset)); + lun_count = 1; + } - target_complete_cmd(cmd, GOOD); + if (buf) { + len = cpu_to_be32(lun_count * 8); + memcpy(buf, &len, min_t(int, sizeof len, cmd->data_length)); + transport_kunmap_data_sg(cmd); + } + + target_complete_cmd_with_length(cmd, SAM_STAT_GOOD, 8 + lun_count * 8); return 0; } EXPORT_SYMBOL(spc_emulate_report_luns); @@ -1167,10 +1323,986 @@ EXPORT_SYMBOL(spc_emulate_report_luns); static sense_reason_t spc_emulate_testunitready(struct se_cmd *cmd) { - target_complete_cmd(cmd, GOOD); + target_complete_cmd(cmd, SAM_STAT_GOOD); return 0; } +static void set_dpofua_usage_bits(u8 *usage_bits, struct se_device *dev) +{ + if (!target_check_fua(dev)) + usage_bits[1] &= ~0x18; + else + usage_bits[1] |= 0x18; +} + +static void set_dpofua_usage_bits32(u8 *usage_bits, struct se_device *dev) +{ + if (!target_check_fua(dev)) + usage_bits[10] &= ~0x18; + else + usage_bits[10] |= 0x18; +} + +static const struct target_opcode_descriptor tcm_opcode_read6 = { + .support = SCSI_SUPPORT_FULL, + .opcode = READ_6, + .cdb_size = 6, + .usage_bits = {READ_6, 0x1f, 0xff, 0xff, + 0xff, SCSI_CONTROL_MASK}, +}; + +static const struct target_opcode_descriptor tcm_opcode_read10 = { + .support = SCSI_SUPPORT_FULL, + .opcode = READ_10, + .cdb_size = 10, + .usage_bits = {READ_10, 0xf8, 0xff, 0xff, + 0xff, 0xff, SCSI_GROUP_NUMBER_MASK, 0xff, + 0xff, SCSI_CONTROL_MASK}, + .update_usage_bits = set_dpofua_usage_bits, +}; + +static const struct target_opcode_descriptor tcm_opcode_read12 = { + .support = SCSI_SUPPORT_FULL, + .opcode = READ_12, + .cdb_size = 12, + .usage_bits = {READ_12, 0xf8, 0xff, 0xff, + 0xff, 0xff, 0xff, 0xff, + 0xff, 0xff, SCSI_GROUP_NUMBER_MASK, SCSI_CONTROL_MASK}, + .update_usage_bits = set_dpofua_usage_bits, +}; + +static const struct target_opcode_descriptor tcm_opcode_read16 = { + .support = SCSI_SUPPORT_FULL, + .opcode = READ_16, + .cdb_size = 16, + .usage_bits = {READ_16, 0xf8, 0xff, 0xff, + 0xff, 0xff, 0xff, 0xff, + 0xff, 0xff, 0xff, 0xff, + 0xff, 0xff, SCSI_GROUP_NUMBER_MASK, SCSI_CONTROL_MASK}, + .update_usage_bits = set_dpofua_usage_bits, +}; + +static const struct target_opcode_descriptor tcm_opcode_write6 = { + .support = SCSI_SUPPORT_FULL, + .opcode = WRITE_6, + .cdb_size = 6, + .usage_bits = {WRITE_6, 0x1f, 0xff, 0xff, + 0xff, SCSI_CONTROL_MASK}, +}; + +static const struct target_opcode_descriptor tcm_opcode_write10 = { + .support = SCSI_SUPPORT_FULL, + .opcode = WRITE_10, + .cdb_size = 10, + .usage_bits = {WRITE_10, 0xf8, 0xff, 0xff, + 0xff, 0xff, SCSI_GROUP_NUMBER_MASK, 0xff, + 0xff, SCSI_CONTROL_MASK}, + .update_usage_bits = set_dpofua_usage_bits, +}; + +static const struct target_opcode_descriptor tcm_opcode_write_verify10 = { + .support = SCSI_SUPPORT_FULL, + .opcode = WRITE_VERIFY, + .cdb_size = 10, + .usage_bits = {WRITE_VERIFY, 0xf0, 0xff, 0xff, + 0xff, 0xff, SCSI_GROUP_NUMBER_MASK, 0xff, + 0xff, SCSI_CONTROL_MASK}, + .update_usage_bits = set_dpofua_usage_bits, +}; + +static const struct target_opcode_descriptor tcm_opcode_write12 = { + .support = SCSI_SUPPORT_FULL, + .opcode = WRITE_12, + .cdb_size = 12, + .usage_bits = {WRITE_12, 0xf8, 0xff, 0xff, + 0xff, 0xff, 0xff, 0xff, + 0xff, 0xff, SCSI_GROUP_NUMBER_MASK, SCSI_CONTROL_MASK}, + .update_usage_bits = set_dpofua_usage_bits, +}; + +static const struct target_opcode_descriptor tcm_opcode_write16 = { + .support = SCSI_SUPPORT_FULL, + .opcode = WRITE_16, + .cdb_size = 16, + .usage_bits = {WRITE_16, 0xf8, 0xff, 0xff, + 0xff, 0xff, 0xff, 0xff, + 0xff, 0xff, 0xff, 0xff, + 0xff, 0xff, SCSI_GROUP_NUMBER_MASK, SCSI_CONTROL_MASK}, + .update_usage_bits = set_dpofua_usage_bits, +}; + +static const struct target_opcode_descriptor tcm_opcode_write_verify16 = { + .support = SCSI_SUPPORT_FULL, + .opcode = WRITE_VERIFY_16, + .cdb_size = 16, + .usage_bits = {WRITE_VERIFY_16, 0xf0, 0xff, 0xff, + 0xff, 0xff, 0xff, 0xff, + 0xff, 0xff, 0xff, 0xff, + 0xff, 0xff, SCSI_GROUP_NUMBER_MASK, SCSI_CONTROL_MASK}, + .update_usage_bits = set_dpofua_usage_bits, +}; + +static bool tcm_is_ws_enabled(const struct target_opcode_descriptor *descr, + struct se_cmd *cmd) +{ + struct exec_cmd_ops *ops = cmd->protocol_data; + struct se_device *dev = cmd->se_dev; + + return (dev->dev_attrib.emulate_tpws && !!ops->execute_unmap) || + !!ops->execute_write_same; +} + +static const struct target_opcode_descriptor tcm_opcode_write_same32 = { + .support = SCSI_SUPPORT_FULL, + .serv_action_valid = 1, + .opcode = VARIABLE_LENGTH_CMD, + .service_action = WRITE_SAME_32, + .cdb_size = 32, + .usage_bits = {VARIABLE_LENGTH_CMD, SCSI_CONTROL_MASK, 0x00, 0x00, + 0x00, 0x00, SCSI_GROUP_NUMBER_MASK, 0x18, + 0x00, WRITE_SAME_32, 0xe8, 0x00, + 0xff, 0xff, 0xff, 0xff, + 0xff, 0xff, 0xff, 0xff, + 0x00, 0x00, 0x00, 0x00, + 0x00, 0x00, 0x00, 0x00, + 0xff, 0xff, 0xff, 0xff}, + .enabled = tcm_is_ws_enabled, + .update_usage_bits = set_dpofua_usage_bits32, +}; + +static bool tcm_is_atomic_enabled(const struct target_opcode_descriptor *descr, + struct se_cmd *cmd) +{ + return cmd->se_dev->dev_attrib.atomic_max_len; +} + +static struct target_opcode_descriptor tcm_opcode_write_atomic16 = { + .support = SCSI_SUPPORT_FULL, + .opcode = WRITE_ATOMIC_16, + .cdb_size = 16, + .usage_bits = {WRITE_ATOMIC_16, 0xf8, 0xff, 0xff, + 0xff, 0xff, 0xff, 0xff, + 0xff, 0xff, 0xff, 0xff, + 0xff, 0xff, SCSI_GROUP_NUMBER_MASK, SCSI_CONTROL_MASK}, + .enabled = tcm_is_atomic_enabled, + .update_usage_bits = set_dpofua_usage_bits, +}; + +static bool tcm_is_caw_enabled(const struct target_opcode_descriptor *descr, + struct se_cmd *cmd) +{ + struct se_device *dev = cmd->se_dev; + + return dev->dev_attrib.emulate_caw; +} + +static const struct target_opcode_descriptor tcm_opcode_compare_write = { + .support = SCSI_SUPPORT_FULL, + .opcode = COMPARE_AND_WRITE, + .cdb_size = 16, + .usage_bits = {COMPARE_AND_WRITE, 0x18, 0xff, 0xff, + 0xff, 0xff, 0xff, 0xff, + 0xff, 0xff, 0x00, 0x00, + 0x00, 0xff, SCSI_GROUP_NUMBER_MASK, SCSI_CONTROL_MASK}, + .enabled = tcm_is_caw_enabled, + .update_usage_bits = set_dpofua_usage_bits, +}; + +static const struct target_opcode_descriptor tcm_opcode_read_capacity = { + .support = SCSI_SUPPORT_FULL, + .opcode = READ_CAPACITY, + .cdb_size = 10, + .usage_bits = {READ_CAPACITY, 0x00, 0xff, 0xff, + 0xff, 0xff, 0x00, 0x00, + 0x01, SCSI_CONTROL_MASK}, +}; + +static const struct target_opcode_descriptor tcm_opcode_read_capacity16 = { + .support = SCSI_SUPPORT_FULL, + .serv_action_valid = 1, + .opcode = SERVICE_ACTION_IN_16, + .service_action = SAI_READ_CAPACITY_16, + .cdb_size = 16, + .usage_bits = {SERVICE_ACTION_IN_16, SAI_READ_CAPACITY_16, 0x00, 0x00, + 0x00, 0x00, 0x00, 0x00, + 0x00, 0x00, 0xff, 0xff, + 0xff, 0xff, 0x00, SCSI_CONTROL_MASK}, +}; + +static bool tcm_is_rep_ref_enabled(const struct target_opcode_descriptor *descr, + struct se_cmd *cmd) +{ + struct se_device *dev = cmd->se_dev; + + spin_lock(&dev->t10_alua.lba_map_lock); + if (list_empty(&dev->t10_alua.lba_map_list)) { + spin_unlock(&dev->t10_alua.lba_map_lock); + return false; + } + spin_unlock(&dev->t10_alua.lba_map_lock); + return true; +} + +static const struct target_opcode_descriptor tcm_opcode_read_report_refferals = { + .support = SCSI_SUPPORT_FULL, + .serv_action_valid = 1, + .opcode = SERVICE_ACTION_IN_16, + .service_action = SAI_REPORT_REFERRALS, + .cdb_size = 16, + .usage_bits = {SERVICE_ACTION_IN_16, SAI_REPORT_REFERRALS, 0x00, 0x00, + 0x00, 0x00, 0x00, 0x00, + 0x00, 0x00, 0xff, 0xff, + 0xff, 0xff, 0x00, SCSI_CONTROL_MASK}, + .enabled = tcm_is_rep_ref_enabled, +}; + +static const struct target_opcode_descriptor tcm_opcode_sync_cache = { + .support = SCSI_SUPPORT_FULL, + .opcode = SYNCHRONIZE_CACHE, + .cdb_size = 10, + .usage_bits = {SYNCHRONIZE_CACHE, 0x02, 0xff, 0xff, + 0xff, 0xff, SCSI_GROUP_NUMBER_MASK, 0xff, + 0xff, SCSI_CONTROL_MASK}, +}; + +static const struct target_opcode_descriptor tcm_opcode_sync_cache16 = { + .support = SCSI_SUPPORT_FULL, + .opcode = SYNCHRONIZE_CACHE_16, + .cdb_size = 16, + .usage_bits = {SYNCHRONIZE_CACHE_16, 0x02, 0xff, 0xff, + 0xff, 0xff, 0xff, 0xff, + 0xff, 0xff, 0xff, 0xff, + 0xff, 0xff, SCSI_GROUP_NUMBER_MASK, SCSI_CONTROL_MASK}, +}; + +static bool tcm_is_unmap_enabled(const struct target_opcode_descriptor *descr, + struct se_cmd *cmd) +{ + struct exec_cmd_ops *ops = cmd->protocol_data; + struct se_device *dev = cmd->se_dev; + + return ops->execute_unmap && dev->dev_attrib.emulate_tpu; +} + +static const struct target_opcode_descriptor tcm_opcode_unmap = { + .support = SCSI_SUPPORT_FULL, + .opcode = UNMAP, + .cdb_size = 10, + .usage_bits = {UNMAP, 0x00, 0x00, 0x00, + 0x00, 0x00, SCSI_GROUP_NUMBER_MASK, 0xff, + 0xff, SCSI_CONTROL_MASK}, + .enabled = tcm_is_unmap_enabled, +}; + +static const struct target_opcode_descriptor tcm_opcode_write_same = { + .support = SCSI_SUPPORT_FULL, + .opcode = WRITE_SAME, + .cdb_size = 10, + .usage_bits = {WRITE_SAME, 0xe8, 0xff, 0xff, + 0xff, 0xff, SCSI_GROUP_NUMBER_MASK, 0xff, + 0xff, SCSI_CONTROL_MASK}, + .enabled = tcm_is_ws_enabled, +}; + +static const struct target_opcode_descriptor tcm_opcode_write_same16 = { + .support = SCSI_SUPPORT_FULL, + .opcode = WRITE_SAME_16, + .cdb_size = 16, + .usage_bits = {WRITE_SAME_16, 0xe8, 0xff, 0xff, + 0xff, 0xff, 0xff, 0xff, + 0xff, 0xff, 0xff, 0xff, + 0xff, 0xff, SCSI_GROUP_NUMBER_MASK, SCSI_CONTROL_MASK}, + .enabled = tcm_is_ws_enabled, +}; + +static const struct target_opcode_descriptor tcm_opcode_verify = { + .support = SCSI_SUPPORT_FULL, + .opcode = VERIFY, + .cdb_size = 10, + .usage_bits = {VERIFY, 0x00, 0xff, 0xff, + 0xff, 0xff, SCSI_GROUP_NUMBER_MASK, 0xff, + 0xff, SCSI_CONTROL_MASK}, +}; + +static const struct target_opcode_descriptor tcm_opcode_verify16 = { + .support = SCSI_SUPPORT_FULL, + .opcode = VERIFY_16, + .cdb_size = 16, + .usage_bits = {VERIFY_16, 0x00, 0xff, 0xff, + 0xff, 0xff, 0xff, 0xff, + 0xff, 0xff, 0xff, 0xff, + 0xff, 0xff, SCSI_GROUP_NUMBER_MASK, SCSI_CONTROL_MASK}, +}; + +static const struct target_opcode_descriptor tcm_opcode_start_stop = { + .support = SCSI_SUPPORT_FULL, + .opcode = START_STOP, + .cdb_size = 6, + .usage_bits = {START_STOP, 0x01, 0x00, 0x00, + 0x01, SCSI_CONTROL_MASK}, +}; + +static const struct target_opcode_descriptor tcm_opcode_mode_select = { + .support = SCSI_SUPPORT_FULL, + .opcode = MODE_SELECT, + .cdb_size = 6, + .usage_bits = {MODE_SELECT, 0x10, 0x00, 0x00, + 0xff, SCSI_CONTROL_MASK}, +}; + +static const struct target_opcode_descriptor tcm_opcode_mode_select10 = { + .support = SCSI_SUPPORT_FULL, + .opcode = MODE_SELECT_10, + .cdb_size = 10, + .usage_bits = {MODE_SELECT_10, 0x10, 0x00, 0x00, + 0x00, 0x00, 0x00, 0xff, + 0xff, SCSI_CONTROL_MASK}, +}; + +static const struct target_opcode_descriptor tcm_opcode_mode_sense = { + .support = SCSI_SUPPORT_FULL, + .opcode = MODE_SENSE, + .cdb_size = 6, + .usage_bits = {MODE_SENSE, 0x08, 0xff, 0xff, + 0xff, SCSI_CONTROL_MASK}, +}; + +static const struct target_opcode_descriptor tcm_opcode_mode_sense10 = { + .support = SCSI_SUPPORT_FULL, + .opcode = MODE_SENSE_10, + .cdb_size = 10, + .usage_bits = {MODE_SENSE_10, 0x18, 0xff, 0xff, + 0x00, 0x00, 0x00, 0xff, + 0xff, SCSI_CONTROL_MASK}, +}; + +static const struct target_opcode_descriptor tcm_opcode_pri_read_keys = { + .support = SCSI_SUPPORT_FULL, + .serv_action_valid = 1, + .opcode = PERSISTENT_RESERVE_IN, + .service_action = PRI_READ_KEYS, + .cdb_size = 10, + .usage_bits = {PERSISTENT_RESERVE_IN, PRI_READ_KEYS, 0x00, 0x00, + 0x00, 0x00, 0x00, 0xff, + 0xff, SCSI_CONTROL_MASK}, +}; + +static const struct target_opcode_descriptor tcm_opcode_pri_read_resrv = { + .support = SCSI_SUPPORT_FULL, + .serv_action_valid = 1, + .opcode = PERSISTENT_RESERVE_IN, + .service_action = PRI_READ_RESERVATION, + .cdb_size = 10, + .usage_bits = {PERSISTENT_RESERVE_IN, PRI_READ_RESERVATION, 0x00, 0x00, + 0x00, 0x00, 0x00, 0xff, + 0xff, SCSI_CONTROL_MASK}, +}; + +static bool tcm_is_pr_enabled(const struct target_opcode_descriptor *descr, + struct se_cmd *cmd) +{ + struct se_device *dev = cmd->se_dev; + + if (!dev->dev_attrib.emulate_pr) + return false; + + if (!(dev->transport_flags & TRANSPORT_FLAG_PASSTHROUGH_PGR)) + return true; + + switch (descr->opcode) { + case RESERVE_6: + case RESERVE_10: + case RELEASE_6: + case RELEASE_10: + /* + * The pr_ops which are used by the backend modules don't + * support these commands. + */ + return false; + case PERSISTENT_RESERVE_OUT: + switch (descr->service_action) { + case PRO_REGISTER_AND_MOVE: + case PRO_REPLACE_LOST_RESERVATION: + /* + * The backend modules don't have access to ports and + * I_T nexuses so they can't handle these type of + * requests. + */ + return false; + } + break; + case PERSISTENT_RESERVE_IN: + if (descr->service_action == PRI_READ_FULL_STATUS) + return false; + break; + } + + return true; +} + +static const struct target_opcode_descriptor tcm_opcode_pri_read_caps = { + .support = SCSI_SUPPORT_FULL, + .serv_action_valid = 1, + .opcode = PERSISTENT_RESERVE_IN, + .service_action = PRI_REPORT_CAPABILITIES, + .cdb_size = 10, + .usage_bits = {PERSISTENT_RESERVE_IN, PRI_REPORT_CAPABILITIES, 0x00, 0x00, + 0x00, 0x00, 0x00, 0xff, + 0xff, SCSI_CONTROL_MASK}, + .enabled = tcm_is_pr_enabled, +}; + +static const struct target_opcode_descriptor tcm_opcode_pri_read_full_status = { + .support = SCSI_SUPPORT_FULL, + .serv_action_valid = 1, + .opcode = PERSISTENT_RESERVE_IN, + .service_action = PRI_READ_FULL_STATUS, + .cdb_size = 10, + .usage_bits = {PERSISTENT_RESERVE_IN, PRI_READ_FULL_STATUS, 0x00, 0x00, + 0x00, 0x00, 0x00, 0xff, + 0xff, SCSI_CONTROL_MASK}, + .enabled = tcm_is_pr_enabled, +}; + +static const struct target_opcode_descriptor tcm_opcode_pro_register = { + .support = SCSI_SUPPORT_FULL, + .serv_action_valid = 1, + .opcode = PERSISTENT_RESERVE_OUT, + .service_action = PRO_REGISTER, + .cdb_size = 10, + .usage_bits = {PERSISTENT_RESERVE_OUT, PRO_REGISTER, 0xff, 0x00, + 0x00, 0xff, 0xff, 0xff, + 0xff, SCSI_CONTROL_MASK}, + .enabled = tcm_is_pr_enabled, +}; + +static const struct target_opcode_descriptor tcm_opcode_pro_reserve = { + .support = SCSI_SUPPORT_FULL, + .serv_action_valid = 1, + .opcode = PERSISTENT_RESERVE_OUT, + .service_action = PRO_RESERVE, + .cdb_size = 10, + .usage_bits = {PERSISTENT_RESERVE_OUT, PRO_RESERVE, 0xff, 0x00, + 0x00, 0xff, 0xff, 0xff, + 0xff, SCSI_CONTROL_MASK}, + .enabled = tcm_is_pr_enabled, +}; + +static const struct target_opcode_descriptor tcm_opcode_pro_release = { + .support = SCSI_SUPPORT_FULL, + .serv_action_valid = 1, + .opcode = PERSISTENT_RESERVE_OUT, + .service_action = PRO_RELEASE, + .cdb_size = 10, + .usage_bits = {PERSISTENT_RESERVE_OUT, PRO_RELEASE, 0xff, 0x00, + 0x00, 0xff, 0xff, 0xff, + 0xff, SCSI_CONTROL_MASK}, + .enabled = tcm_is_pr_enabled, +}; + +static const struct target_opcode_descriptor tcm_opcode_pro_clear = { + .support = SCSI_SUPPORT_FULL, + .serv_action_valid = 1, + .opcode = PERSISTENT_RESERVE_OUT, + .service_action = PRO_CLEAR, + .cdb_size = 10, + .usage_bits = {PERSISTENT_RESERVE_OUT, PRO_CLEAR, 0xff, 0x00, + 0x00, 0xff, 0xff, 0xff, + 0xff, SCSI_CONTROL_MASK}, + .enabled = tcm_is_pr_enabled, +}; + +static const struct target_opcode_descriptor tcm_opcode_pro_preempt = { + .support = SCSI_SUPPORT_FULL, + .serv_action_valid = 1, + .opcode = PERSISTENT_RESERVE_OUT, + .service_action = PRO_PREEMPT, + .cdb_size = 10, + .usage_bits = {PERSISTENT_RESERVE_OUT, PRO_PREEMPT, 0xff, 0x00, + 0x00, 0xff, 0xff, 0xff, + 0xff, SCSI_CONTROL_MASK}, + .enabled = tcm_is_pr_enabled, +}; + +static const struct target_opcode_descriptor tcm_opcode_pro_preempt_abort = { + .support = SCSI_SUPPORT_FULL, + .serv_action_valid = 1, + .opcode = PERSISTENT_RESERVE_OUT, + .service_action = PRO_PREEMPT_AND_ABORT, + .cdb_size = 10, + .usage_bits = {PERSISTENT_RESERVE_OUT, PRO_PREEMPT_AND_ABORT, 0xff, 0x00, + 0x00, 0xff, 0xff, 0xff, + 0xff, SCSI_CONTROL_MASK}, + .enabled = tcm_is_pr_enabled, +}; + +static const struct target_opcode_descriptor tcm_opcode_pro_reg_ign_exist = { + .support = SCSI_SUPPORT_FULL, + .serv_action_valid = 1, + .opcode = PERSISTENT_RESERVE_OUT, + .service_action = PRO_REGISTER_AND_IGNORE_EXISTING_KEY, + .cdb_size = 10, + .usage_bits = { + PERSISTENT_RESERVE_OUT, PRO_REGISTER_AND_IGNORE_EXISTING_KEY, + 0xff, 0x00, + 0x00, 0xff, 0xff, 0xff, + 0xff, SCSI_CONTROL_MASK}, + .enabled = tcm_is_pr_enabled, +}; + +static const struct target_opcode_descriptor tcm_opcode_pro_register_move = { + .support = SCSI_SUPPORT_FULL, + .serv_action_valid = 1, + .opcode = PERSISTENT_RESERVE_OUT, + .service_action = PRO_REGISTER_AND_MOVE, + .cdb_size = 10, + .usage_bits = {PERSISTENT_RESERVE_OUT, PRO_REGISTER_AND_MOVE, 0xff, 0x00, + 0x00, 0xff, 0xff, 0xff, + 0xff, SCSI_CONTROL_MASK}, + .enabled = tcm_is_pr_enabled, +}; + +static const struct target_opcode_descriptor tcm_opcode_release = { + .support = SCSI_SUPPORT_FULL, + .opcode = RELEASE_6, + .cdb_size = 6, + .usage_bits = {RELEASE_6, 0x00, 0x00, 0x00, + 0x00, SCSI_CONTROL_MASK}, + .enabled = tcm_is_pr_enabled, +}; + +static const struct target_opcode_descriptor tcm_opcode_release10 = { + .support = SCSI_SUPPORT_FULL, + .opcode = RELEASE_10, + .cdb_size = 10, + .usage_bits = {RELEASE_10, 0x00, 0x00, 0x00, + 0x00, 0x00, 0x00, 0xff, + 0xff, SCSI_CONTROL_MASK}, + .enabled = tcm_is_pr_enabled, +}; + +static const struct target_opcode_descriptor tcm_opcode_reserve = { + .support = SCSI_SUPPORT_FULL, + .opcode = RESERVE_6, + .cdb_size = 6, + .usage_bits = {RESERVE_6, 0x00, 0x00, 0x00, + 0x00, SCSI_CONTROL_MASK}, + .enabled = tcm_is_pr_enabled, +}; + +static const struct target_opcode_descriptor tcm_opcode_reserve10 = { + .support = SCSI_SUPPORT_FULL, + .opcode = RESERVE_10, + .cdb_size = 10, + .usage_bits = {RESERVE_10, 0x00, 0x00, 0x00, + 0x00, 0x00, 0x00, 0xff, + 0xff, SCSI_CONTROL_MASK}, + .enabled = tcm_is_pr_enabled, +}; + +static const struct target_opcode_descriptor tcm_opcode_request_sense = { + .support = SCSI_SUPPORT_FULL, + .opcode = REQUEST_SENSE, + .cdb_size = 6, + .usage_bits = {REQUEST_SENSE, 0x00, 0x00, 0x00, + 0xff, SCSI_CONTROL_MASK}, +}; + +static const struct target_opcode_descriptor tcm_opcode_inquiry = { + .support = SCSI_SUPPORT_FULL, + .opcode = INQUIRY, + .cdb_size = 6, + .usage_bits = {INQUIRY, 0x01, 0xff, 0xff, + 0xff, SCSI_CONTROL_MASK}, +}; + +static bool tcm_is_3pc_enabled(const struct target_opcode_descriptor *descr, + struct se_cmd *cmd) +{ + struct se_device *dev = cmd->se_dev; + + return dev->dev_attrib.emulate_3pc; +} + +static const struct target_opcode_descriptor tcm_opcode_extended_copy_lid1 = { + .support = SCSI_SUPPORT_FULL, + .serv_action_valid = 1, + .opcode = EXTENDED_COPY, + .cdb_size = 16, + .usage_bits = {EXTENDED_COPY, 0x00, 0x00, 0x00, + 0x00, 0x00, 0x00, 0x00, + 0x00, 0x00, 0xff, 0xff, + 0xff, 0xff, 0x00, SCSI_CONTROL_MASK}, + .enabled = tcm_is_3pc_enabled, +}; + +static const struct target_opcode_descriptor tcm_opcode_rcv_copy_res_op_params = { + .support = SCSI_SUPPORT_FULL, + .serv_action_valid = 1, + .opcode = RECEIVE_COPY_RESULTS, + .service_action = RCR_SA_OPERATING_PARAMETERS, + .cdb_size = 16, + .usage_bits = {RECEIVE_COPY_RESULTS, RCR_SA_OPERATING_PARAMETERS, + 0x00, 0x00, + 0x00, 0x00, 0x00, 0x00, + 0x00, 0x00, 0xff, 0xff, + 0xff, 0xff, 0x00, SCSI_CONTROL_MASK}, + .enabled = tcm_is_3pc_enabled, +}; + +static const struct target_opcode_descriptor tcm_opcode_report_luns = { + .support = SCSI_SUPPORT_FULL, + .opcode = REPORT_LUNS, + .cdb_size = 12, + .usage_bits = {REPORT_LUNS, 0x00, 0xff, 0x00, + 0x00, 0x00, 0xff, 0xff, + 0xff, 0xff, 0x00, SCSI_CONTROL_MASK}, +}; + +static const struct target_opcode_descriptor tcm_opcode_test_unit_ready = { + .support = SCSI_SUPPORT_FULL, + .opcode = TEST_UNIT_READY, + .cdb_size = 6, + .usage_bits = {TEST_UNIT_READY, 0x00, 0x00, 0x00, + 0x00, SCSI_CONTROL_MASK}, +}; + +static const struct target_opcode_descriptor tcm_opcode_report_target_pgs = { + .support = SCSI_SUPPORT_FULL, + .serv_action_valid = 1, + .opcode = MAINTENANCE_IN, + .service_action = MI_REPORT_TARGET_PGS, + .cdb_size = 12, + .usage_bits = {MAINTENANCE_IN, 0xE0 | MI_REPORT_TARGET_PGS, 0x00, 0x00, + 0x00, 0x00, 0xff, 0xff, + 0xff, 0xff, 0x00, SCSI_CONTROL_MASK}, +}; + +static bool spc_rsoc_enabled(const struct target_opcode_descriptor *descr, + struct se_cmd *cmd) +{ + struct se_device *dev = cmd->se_dev; + + return dev->dev_attrib.emulate_rsoc; +} + +static const struct target_opcode_descriptor tcm_opcode_report_supp_opcodes = { + .support = SCSI_SUPPORT_FULL, + .serv_action_valid = 1, + .opcode = MAINTENANCE_IN, + .service_action = MI_REPORT_SUPPORTED_OPERATION_CODES, + .cdb_size = 12, + .usage_bits = {MAINTENANCE_IN, MI_REPORT_SUPPORTED_OPERATION_CODES, + 0x87, 0xff, + 0xff, 0xff, 0xff, 0xff, + 0xff, 0xff, 0x00, SCSI_CONTROL_MASK}, + .enabled = spc_rsoc_enabled, +}; + +static bool tcm_is_set_tpg_enabled(const struct target_opcode_descriptor *descr, + struct se_cmd *cmd) +{ + struct t10_alua_tg_pt_gp *l_tg_pt_gp; + struct se_lun *l_lun = cmd->se_lun; + + rcu_read_lock(); + l_tg_pt_gp = rcu_dereference(l_lun->lun_tg_pt_gp); + if (!l_tg_pt_gp) { + rcu_read_unlock(); + return false; + } + if (!(l_tg_pt_gp->tg_pt_gp_alua_access_type & TPGS_EXPLICIT_ALUA)) { + rcu_read_unlock(); + return false; + } + rcu_read_unlock(); + + return true; +} + +static const struct target_opcode_descriptor tcm_opcode_set_tpg = { + .support = SCSI_SUPPORT_FULL, + .serv_action_valid = 1, + .opcode = MAINTENANCE_OUT, + .service_action = MO_SET_TARGET_PGS, + .cdb_size = 12, + .usage_bits = {MAINTENANCE_OUT, MO_SET_TARGET_PGS, 0x00, 0x00, + 0x00, 0x00, 0xff, 0xff, + 0xff, 0xff, 0x00, SCSI_CONTROL_MASK}, + .enabled = tcm_is_set_tpg_enabled, +}; + +static const struct target_opcode_descriptor *tcm_supported_opcodes[] = { + &tcm_opcode_read6, + &tcm_opcode_read10, + &tcm_opcode_read12, + &tcm_opcode_read16, + &tcm_opcode_write6, + &tcm_opcode_write10, + &tcm_opcode_write_verify10, + &tcm_opcode_write12, + &tcm_opcode_write16, + &tcm_opcode_write_verify16, + &tcm_opcode_write_same32, + &tcm_opcode_write_atomic16, + &tcm_opcode_compare_write, + &tcm_opcode_read_capacity, + &tcm_opcode_read_capacity16, + &tcm_opcode_read_report_refferals, + &tcm_opcode_sync_cache, + &tcm_opcode_sync_cache16, + &tcm_opcode_unmap, + &tcm_opcode_write_same, + &tcm_opcode_write_same16, + &tcm_opcode_verify, + &tcm_opcode_verify16, + &tcm_opcode_start_stop, + &tcm_opcode_mode_select, + &tcm_opcode_mode_select10, + &tcm_opcode_mode_sense, + &tcm_opcode_mode_sense10, + &tcm_opcode_pri_read_keys, + &tcm_opcode_pri_read_resrv, + &tcm_opcode_pri_read_caps, + &tcm_opcode_pri_read_full_status, + &tcm_opcode_pro_register, + &tcm_opcode_pro_reserve, + &tcm_opcode_pro_release, + &tcm_opcode_pro_clear, + &tcm_opcode_pro_preempt, + &tcm_opcode_pro_preempt_abort, + &tcm_opcode_pro_reg_ign_exist, + &tcm_opcode_pro_register_move, + &tcm_opcode_release, + &tcm_opcode_release10, + &tcm_opcode_reserve, + &tcm_opcode_reserve10, + &tcm_opcode_request_sense, + &tcm_opcode_inquiry, + &tcm_opcode_extended_copy_lid1, + &tcm_opcode_rcv_copy_res_op_params, + &tcm_opcode_report_luns, + &tcm_opcode_test_unit_ready, + &tcm_opcode_report_target_pgs, + &tcm_opcode_report_supp_opcodes, + &tcm_opcode_set_tpg, +}; + +static int +spc_rsoc_encode_command_timeouts_descriptor(unsigned char *buf, u8 ctdp, + const struct target_opcode_descriptor *descr) +{ + if (!ctdp) + return 0; + + put_unaligned_be16(0xa, buf); + buf[3] = descr->specific_timeout; + put_unaligned_be32(descr->nominal_timeout, &buf[4]); + put_unaligned_be32(descr->recommended_timeout, &buf[8]); + + return 12; +} + +static int +spc_rsoc_encode_command_descriptor(unsigned char *buf, u8 ctdp, + const struct target_opcode_descriptor *descr) +{ + int td_size = 0; + + buf[0] = descr->opcode; + + put_unaligned_be16(descr->service_action, &buf[2]); + + buf[5] = (ctdp << 1) | descr->serv_action_valid; + put_unaligned_be16(descr->cdb_size, &buf[6]); + + td_size = spc_rsoc_encode_command_timeouts_descriptor(&buf[8], ctdp, + descr); + + return 8 + td_size; +} + +static int +spc_rsoc_encode_one_command_descriptor(unsigned char *buf, u8 ctdp, + const struct target_opcode_descriptor *descr, + struct se_device *dev) +{ + int td_size = 0; + + if (!descr) { + buf[1] = (ctdp << 7) | SCSI_SUPPORT_NOT_SUPPORTED; + return 2; + } + + buf[1] = (ctdp << 7) | SCSI_SUPPORT_FULL; + put_unaligned_be16(descr->cdb_size, &buf[2]); + memcpy(&buf[4], descr->usage_bits, descr->cdb_size); + if (descr->update_usage_bits) + descr->update_usage_bits(&buf[4], dev); + + td_size = spc_rsoc_encode_command_timeouts_descriptor( + &buf[4 + descr->cdb_size], ctdp, descr); + + return 4 + descr->cdb_size + td_size; +} + +static sense_reason_t +spc_rsoc_get_descr(struct se_cmd *cmd, const struct target_opcode_descriptor **opcode) +{ + const struct target_opcode_descriptor *descr; + struct se_session *sess = cmd->se_sess; + unsigned char *cdb = cmd->t_task_cdb; + u8 opts = cdb[2] & 0x3; + u8 requested_opcode; + u16 requested_sa; + int i; + + requested_opcode = cdb[3]; + requested_sa = ((u16)cdb[4]) << 8 | cdb[5]; + *opcode = NULL; + + if (opts > 3) { + pr_debug("TARGET_CORE[%s]: Invalid REPORT SUPPORTED OPERATION CODES" + " with unsupported REPORTING OPTIONS %#x for 0x%08llx from %s\n", + cmd->se_tfo->fabric_name, opts, + cmd->se_lun->unpacked_lun, + sess->se_node_acl->initiatorname); + return TCM_INVALID_CDB_FIELD; + } + + for (i = 0; i < ARRAY_SIZE(tcm_supported_opcodes); i++) { + descr = tcm_supported_opcodes[i]; + if (descr->opcode != requested_opcode) + continue; + + switch (opts) { + case 0x1: + /* + * If the REQUESTED OPERATION CODE field specifies an + * operation code for which the device server implements + * service actions, then the device server shall + * terminate the command with CHECK CONDITION status, + * with the sense key set to ILLEGAL REQUEST, and the + * additional sense code set to INVALID FIELD IN CDB + */ + if (descr->serv_action_valid) + return TCM_INVALID_CDB_FIELD; + + if (!descr->enabled || descr->enabled(descr, cmd)) { + *opcode = descr; + return TCM_NO_SENSE; + } + break; + case 0x2: + /* + * If the REQUESTED OPERATION CODE field specifies an + * operation code for which the device server does not + * implement service actions, then the device server + * shall terminate the command with CHECK CONDITION + * status, with the sense key set to ILLEGAL REQUEST, + * and the additional sense code set to INVALID FIELD IN CDB. + */ + if (descr->serv_action_valid && + descr->service_action == requested_sa) { + if (!descr->enabled || descr->enabled(descr, + cmd)) { + *opcode = descr; + return TCM_NO_SENSE; + } + } else if (!descr->serv_action_valid) + return TCM_INVALID_CDB_FIELD; + break; + case 0x3: + /* + * The command support data for the operation code and + * service action a specified in the REQUESTED OPERATION + * CODE field and REQUESTED SERVICE ACTION field shall + * be returned in the one_command parameter data format. + */ + if (descr->service_action == requested_sa) + if (!descr->enabled || descr->enabled(descr, + cmd)) { + *opcode = descr; + return TCM_NO_SENSE; + } + break; + } + } + + return TCM_NO_SENSE; +} + +static sense_reason_t +spc_emulate_report_supp_op_codes(struct se_cmd *cmd) +{ + int descr_num = ARRAY_SIZE(tcm_supported_opcodes); + const struct target_opcode_descriptor *descr = NULL; + unsigned char *cdb = cmd->t_task_cdb; + u8 rctd = (cdb[2] >> 7) & 0x1; + unsigned char *buf = NULL; + int response_length = 0; + u8 opts = cdb[2] & 0x3; + unsigned char *rbuf; + sense_reason_t ret = 0; + int i; + + if (!cmd->se_dev->dev_attrib.emulate_rsoc) + return TCM_UNSUPPORTED_SCSI_OPCODE; + + rbuf = transport_kmap_data_sg(cmd); + if (cmd->data_length && !rbuf) { + ret = TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; + goto out; + } + + if (opts == 0) + response_length = 4 + (8 + rctd * 12) * descr_num; + else { + ret = spc_rsoc_get_descr(cmd, &descr); + if (ret) + goto out; + + if (descr) + response_length = 4 + descr->cdb_size + rctd * 12; + else + response_length = 2; + } + + buf = kzalloc(response_length, GFP_KERNEL); + if (!buf) { + ret = TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; + goto out; + } + response_length = 0; + + if (opts == 0) { + response_length += 4; + + for (i = 0; i < ARRAY_SIZE(tcm_supported_opcodes); i++) { + descr = tcm_supported_opcodes[i]; + if (descr->enabled && !descr->enabled(descr, cmd)) + continue; + + response_length += spc_rsoc_encode_command_descriptor( + &buf[response_length], rctd, descr); + } + put_unaligned_be32(response_length - 4, buf); + } else { + response_length = spc_rsoc_encode_one_command_descriptor( + &buf[response_length], rctd, descr, + cmd->se_dev); + } + + memcpy(rbuf, buf, min_t(u32, response_length, cmd->data_length)); +out: + kfree(buf); + transport_kunmap_data_sg(cmd); + + if (!ret) + target_complete_cmd_with_length(cmd, SAM_STAT_GOOD, response_length); + return ret; +} + sense_reason_t spc_parse_cdb(struct se_cmd *cmd, unsigned int *size) { @@ -1178,12 +2310,30 @@ spc_parse_cdb(struct se_cmd *cmd, unsigned int *size) unsigned char *cdb = cmd->t_task_cdb; switch (cdb[0]) { + case RESERVE_6: + case RESERVE_10: + case RELEASE_6: + case RELEASE_10: + if (!dev->dev_attrib.emulate_pr) + return TCM_UNSUPPORTED_SCSI_OPCODE; + + if (dev->transport_flags & TRANSPORT_FLAG_PASSTHROUGH_PGR) + return TCM_UNSUPPORTED_SCSI_OPCODE; + break; + case PERSISTENT_RESERVE_IN: + case PERSISTENT_RESERVE_OUT: + if (!dev->dev_attrib.emulate_pr) + return TCM_UNSUPPORTED_SCSI_OPCODE; + break; + } + + switch (cdb[0]) { case MODE_SELECT: *size = cdb[4]; cmd->execute_cmd = spc_emulate_modeselect; break; case MODE_SELECT_10: - *size = (cdb[7] << 8) + cdb[8]; + *size = get_unaligned_be16(&cdb[7]); cmd->execute_cmd = spc_emulate_modeselect; break; case MODE_SENSE: @@ -1191,38 +2341,38 @@ spc_parse_cdb(struct se_cmd *cmd, unsigned int *size) cmd->execute_cmd = spc_emulate_modesense; break; case MODE_SENSE_10: - *size = (cdb[7] << 8) + cdb[8]; + *size = get_unaligned_be16(&cdb[7]); cmd->execute_cmd = spc_emulate_modesense; break; case LOG_SELECT: case LOG_SENSE: - *size = (cdb[7] << 8) + cdb[8]; + *size = get_unaligned_be16(&cdb[7]); break; case PERSISTENT_RESERVE_IN: - *size = (cdb[7] << 8) + cdb[8]; + *size = get_unaligned_be16(&cdb[7]); cmd->execute_cmd = target_scsi3_emulate_pr_in; break; case PERSISTENT_RESERVE_OUT: - *size = (cdb[7] << 8) + cdb[8]; + *size = get_unaligned_be32(&cdb[5]); cmd->execute_cmd = target_scsi3_emulate_pr_out; break; - case RELEASE: + case RELEASE_6: case RELEASE_10: if (cdb[0] == RELEASE_10) - *size = (cdb[7] << 8) | cdb[8]; + *size = get_unaligned_be16(&cdb[7]); else *size = cmd->data_length; cmd->execute_cmd = target_scsi2_reservation_release; break; - case RESERVE: + case RESERVE_6: case RESERVE_10: /* * The SPC-2 RESERVE does not contain a size in the SCSI CDB. * Assume the passthrough or $FABRIC_MOD will tell us about it. */ if (cdb[0] == RESERVE_10) - *size = (cdb[7] << 8) | cdb[8]; + *size = get_unaligned_be16(&cdb[7]); else *size = cmd->data_length; @@ -1233,41 +2383,46 @@ spc_parse_cdb(struct se_cmd *cmd, unsigned int *size) cmd->execute_cmd = spc_emulate_request_sense; break; case INQUIRY: - *size = (cdb[3] << 8) + cdb[4]; + *size = get_unaligned_be16(&cdb[3]); /* - * Do implict HEAD_OF_QUEUE processing for INQUIRY. + * Do implicit HEAD_OF_QUEUE processing for INQUIRY. * See spc4r17 section 5.3 */ - cmd->sam_task_attr = MSG_HEAD_TAG; + cmd->sam_task_attr = TCM_HEAD_TAG; cmd->execute_cmd = spc_emulate_inquiry; break; case SECURITY_PROTOCOL_IN: case SECURITY_PROTOCOL_OUT: - *size = (cdb[6] << 24) | (cdb[7] << 16) | (cdb[8] << 8) | cdb[9]; + *size = get_unaligned_be32(&cdb[6]); break; case EXTENDED_COPY: - case READ_ATTRIBUTE: + *size = get_unaligned_be32(&cdb[10]); + cmd->execute_cmd = target_do_xcopy; + break; case RECEIVE_COPY_RESULTS: + *size = get_unaligned_be32(&cdb[10]); + cmd->execute_cmd = target_do_receive_copy_results; + break; + case READ_ATTRIBUTE: case WRITE_ATTRIBUTE: - *size = (cdb[10] << 24) | (cdb[11] << 16) | - (cdb[12] << 8) | cdb[13]; + *size = get_unaligned_be32(&cdb[10]); break; case RECEIVE_DIAGNOSTIC: case SEND_DIAGNOSTIC: - *size = (cdb[3] << 8) | cdb[4]; + *size = get_unaligned_be16(&cdb[3]); break; case WRITE_BUFFER: - *size = (cdb[6] << 16) + (cdb[7] << 8) + cdb[8]; + *size = get_unaligned_be24(&cdb[6]); break; case REPORT_LUNS: cmd->execute_cmd = spc_emulate_report_luns; - *size = (cdb[6] << 24) | (cdb[7] << 16) | (cdb[8] << 8) | cdb[9]; + *size = get_unaligned_be32(&cdb[6]); /* - * Do implict HEAD_OF_QUEUE processing for REPORT_LUNS + * Do implicit HEAD_OF_QUEUE processing for REPORT_LUNS * See spc4r17 section 5.3 */ - cmd->sam_task_attr = MSG_HEAD_TAG; + cmd->sam_task_attr = TCM_HEAD_TAG; break; case TEST_UNIT_READY: cmd->execute_cmd = spc_emulate_testunitready; @@ -1283,6 +2438,10 @@ spc_parse_cdb(struct se_cmd *cmd, unsigned int *size) cmd->execute_cmd = target_emulate_report_target_port_groups; } + if ((cdb[1] & 0x1f) == + MI_REPORT_SUPPORTED_OPERATION_CODES) + cmd->execute_cmd = + spc_emulate_report_supp_op_codes; *size = get_unaligned_be32(&cdb[6]); } else { /* @@ -1310,9 +2469,6 @@ spc_parse_cdb(struct se_cmd *cmd, unsigned int *size) } break; default: - pr_warn("TARGET_CORE[%s]: Unsupported SCSI Opcode" - " 0x%02x, sending CHECK_CONDITION.\n", - cmd->se_tfo->get_fabric_name(), cdb[0]); return TCM_UNSUPPORTED_SCSI_OPCODE; } |