| // SPDX-License-Identifier: GPL-2.0-or-later |
| /* |
| * SCSI Primary Commands (SPC) parsing and emulation. |
| * |
| * (c) Copyright 2002-2013 Datera, Inc. |
| * |
| * Nicholas A. Bellinger <nab@kernel.org> |
| */ |
| |
| #include <linux/kernel.h> |
| #include <linux/module.h> |
| #include <asm/unaligned.h> |
| |
| #include <scsi/scsi_proto.h> |
| #include <scsi/scsi_common.h> |
| #include <scsi/scsi_tcq.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_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_lun *lun, unsigned char *buf) |
| { |
| struct t10_alua_tg_pt_gp *tg_pt_gp; |
| |
| /* |
| * Set SCCS for MAINTENANCE_IN + REPORT_TARGET_PORT_GROUPS. |
| */ |
| buf[5] = 0x80; |
| |
| /* |
| * Set TPGS field for explicit and/or implicit ALUA access type |
| * and opteration. |
| * |
| * See spc4r17 section 6.4.2 Table 135 |
| */ |
| spin_lock(&lun->lun_tg_pt_gp_lock); |
| tg_pt_gp = lun->lun_tg_pt_gp; |
| if (tg_pt_gp) |
| buf[5] |= tg_pt_gp->tg_pt_gp_alua_access_type; |
| spin_unlock(&lun->lun_tg_pt_gp_lock); |
| } |
| |
| sense_reason_t |
| spc_emulate_inquiry_std(struct se_cmd *cmd, unsigned char *buf) |
| { |
| struct se_lun *lun = cmd->se_lun; |
| 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 */ |
| |
| /* |
| * 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 |
| */ |
| 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; |
| } |
| |
| buf[7] = 0x2; /* CmdQue=1 */ |
| |
| /* |
| * 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)); |
| buf[4] = 31; /* Set additional length to 31 */ |
| |
| return 0; |
| } |
| EXPORT_SYMBOL(spc_emulate_inquiry_std); |
| |
| /* unit serial number */ |
| static sense_reason_t |
| spc_emulate_evpd_80(struct se_cmd *cmd, unsigned char *buf) |
| { |
| struct se_device *dev = cmd->se_dev; |
| u16 len; |
| |
| if (dev->dev_flags & DF_EMULATED_VPD_UNIT_SERIAL) { |
| len = sprintf(&buf[4], "%s", dev->t10_wwn.unit_serial); |
| len++; /* Extra Byte for NULL Terminator */ |
| buf[3] = len; |
| } |
| return 0; |
| } |
| |
| void spc_parse_naa_6h_vendor_specific(struct se_device *dev, |
| unsigned char *buf) |
| { |
| unsigned char *p = &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. |
| */ |
| sense_reason_t |
| 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_portal_group *tpg = NULL; |
| struct t10_alua_lu_gp_member *lu_gp_mem; |
| struct t10_alua_tg_pt_gp *tg_pt_gp; |
| unsigned char *prod = &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->dev_flags & DF_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->dev_flags & DF_EMULATED_VPD_UNIT_SERIAL) { |
| unit_serial_len = strlen(&dev->t10_wwn.unit_serial[0]); |
| unit_serial_len++; /* For NULL Terminator */ |
| |
| 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; |
| /* 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 */ |
| buf[off+3] = id_len; |
| /* Header size for Designation descriptor */ |
| len += (id_len + 4); |
| off += (id_len + 4); |
| |
| if (1) { |
| struct t10_alua_lu_gp *lu_gp; |
| u32 padding, scsi_name_len, scsi_target_len; |
| u16 lu_gp_id = 0; |
| u16 tg_pt_gp_id = 0; |
| u16 tpgt; |
| |
| tpg = lun->lun_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->proto_id << 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; |
| put_unaligned_be16(lun->lun_rtpi, &buf[off]); |
| off += 2; |
| 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 |
| */ |
| spin_lock(&lun->lun_tg_pt_gp_lock); |
| tg_pt_gp = lun->lun_tg_pt_gp; |
| if (!tg_pt_gp) { |
| spin_unlock(&lun->lun_tg_pt_gp_lock); |
| goto check_lu_gp; |
| } |
| tg_pt_gp_id = tg_pt_gp->tg_pt_gp_id; |
| spin_unlock(&lun->lun_tg_pt_gp_lock); |
| |
| buf[off] = tpg->proto_id << 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 */ |
| put_unaligned_be16(tg_pt_gp_id, &buf[off]); |
| off += 2; |
| 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 */ |
| put_unaligned_be16(lu_gp_id, &buf[off]); |
| off += 2; |
| 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: |
| buf[off] = tpg->proto_id << 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. |
| */ |
| 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); |
| |
| /* |
| * 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; |
| |
| buf[off-1] = scsi_target_len; |
| off += scsi_target_len; |
| |
| /* 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 (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; |
| } |
| |
| /* Block Limits VPD page */ |
| static sense_reason_t |
| spc_emulate_evpd_b0(struct se_cmd *cmd, unsigned char *buf) |
| { |
| struct se_device *dev = cmd->se_dev; |
| u32 mtl = 0; |
| int have_tp = 0, opt, min; |
| |
| /* |
| * 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->dev_attrib.emulate_tpu || dev->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 MAXIMUM COMPARE AND WRITE LENGTH |
| */ |
| if (dev->dev_attrib.emulate_caw) |
| buf[5] = 0x01; |
| |
| /* |
| * Set OPTIMAL TRANSFER LENGTH GRANULARITY |
| */ |
| 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 |
| */ |
| if (cmd->se_tfo->max_data_sg_nents) { |
| mtl = (cmd->se_tfo->max_data_sg_nents * PAGE_SIZE) / |
| dev->dev_attrib.block_size; |
| } |
| put_unaligned_be32(min_not_zero(mtl, dev->dev_attrib.hw_max_sectors), &buf[8]); |
| |
| /* |
| * Set OPTIMAL TRANSFER LENGTH |
| */ |
| 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]); |
| |
| /* |
| * Exit now if we don't support TP. |
| */ |
| if (!have_tp) |
| goto max_write_same; |
| |
| /* |
| * Set MAXIMUM UNMAP LBA COUNT |
| */ |
| put_unaligned_be32(dev->dev_attrib.max_unmap_lba_count, &buf[20]); |
| |
| /* |
| * Set MAXIMUM UNMAP BLOCK DESCRIPTOR COUNT |
| */ |
| put_unaligned_be32(dev->dev_attrib.max_unmap_block_desc_count, |
| &buf[24]); |
| |
| /* |
| * Set OPTIMAL UNMAP GRANULARITY |
| */ |
| put_unaligned_be32(dev->dev_attrib.unmap_granularity, &buf[28]); |
| |
| /* |
| * UNMAP GRANULARITY ALIGNMENT |
| */ |
| put_unaligned_be32(dev->dev_attrib.unmap_granularity_alignment, |
| &buf[32]); |
| if (dev->dev_attrib.unmap_granularity_alignment != 0) |
| buf[32] |= 0x80; /* Set the UGAVALID bit */ |
| |
| /* |
| * MAXIMUM WRITE SAME LENGTH |
| */ |
| max_write_same: |
| put_unaligned_be64(dev->dev_attrib.max_write_same_len, &buf[36]); |
| |
| return 0; |
| } |
| |
| /* Block Device Characteristics VPD page */ |
| static sense_reason_t |
| 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->dev_attrib.is_nonrot ? 1 : 0; |
| |
| return 0; |
| } |
| |
| /* Thin Provisioning VPD */ |
| static sense_reason_t |
| 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->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->dev_attrib.emulate_tpws != 0) |
| 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; |
| } |
| |
| static sense_reason_t |
| spc_emulate_evpd_00(struct se_cmd *cmd, unsigned char *buf); |
| |
| static struct { |
| uint8_t page; |
| sense_reason_t (*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 }, |
| { .page = 0xb3, .emulate = spc_emulate_evpd_b3 }, |
| }; |
| |
| /* supported vital product data pages */ |
| static sense_reason_t |
| 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->dev_flags & DF_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 sense_reason_t |
| spc_emulate_inquiry(struct se_cmd *cmd) |
| { |
| struct se_device *dev = cmd->se_dev; |
| unsigned char *rbuf; |
| unsigned char *cdb = cmd->t_task_cdb; |
| unsigned char *buf; |
| sense_reason_t ret; |
| int p; |
| int len = 0; |
| |
| 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; |
| } |
| |
| 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]); |
| ret = TCM_INVALID_CDB_FIELD; |
| goto out; |
| } |
| |
| ret = spc_emulate_inquiry_std(cmd, buf); |
| len = buf[4] + 5; |
| 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); |
| len = get_unaligned_be16(&buf[2]) + 4; |
| goto out; |
| } |
| } |
| |
| pr_err("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, SE_INQUIRY_BUF, cmd->data_length)); |
| transport_kunmap_data_sg(cmd); |
| } |
| kfree(buf); |
| |
| if (!ret) |
| target_complete_cmd_with_length(cmd, GOOD, len); |
| return ret; |
| } |
| |
| static int spc_modesense_rwrecovery(struct se_cmd *cmd, u8 pc, u8 *p) |
| { |
| p[0] = 0x01; |
| p[1] = 0x0a; |
| |
| /* No changeable values for now */ |
| if (pc == 1) |
| goto out; |
| |
| out: |
| return 12; |
| } |
| |
| 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; |
| |
| /* No changeable values for now */ |
| if (pc == 1) |
| goto out; |
| |
| /* 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 |
| * |
| * 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->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. |
| */ |
| 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 |
| * |
| * 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->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; |
| |
| out: |
| return 12; |
| } |
| |
| 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; |
| |
| /* No changeable values for now */ |
| if (pc == 1) |
| goto out; |
| |
| if (target_check_wce(dev)) |
| p[2] = 0x04; /* Write Cache Enable */ |
| p[12] = 0x20; /* Disabled Read Ahead */ |
| |
| out: |
| return 20; |
| } |
| |
| static int spc_modesense_informational_exceptions(struct se_cmd *cmd, u8 pc, unsigned char *p) |
| { |
| p[0] = 0x1c; |
| p[1] = 0x0a; |
| |
| /* No changeable values for now */ |
| if (pc == 1) |
| goto out; |
| |
| out: |
| return 12; |
| } |
| |
| static struct { |
| uint8_t page; |
| uint8_t subpage; |
| 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 }, |
| { .page = 0x0a, .subpage = 0x00, .emulate = spc_modesense_control }, |
| { .page = 0x1c, .subpage = 0x00, .emulate = spc_modesense_informational_exceptions }, |
| }; |
| |
| 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_modesense_blockdesc(unsigned char *buf, u64 blocks, u32 block_size) |
| { |
| *buf++ = 8; |
| put_unaligned_be32(min(blocks, 0xffffffffull), buf); |
| buf += 4; |
| put_unaligned_be32(block_size, buf); |
| return 9; |
| } |
| |
| static int spc_modesense_long_blockdesc(unsigned char *buf, u64 blocks, u32 block_size) |
| { |
| if (blocks <= 0xffffffff) |
| return spc_modesense_blockdesc(buf + 3, blocks, block_size) + 3; |
| |
| *buf++ = 1; /* LONGLBA */ |
| buf += 2; |
| *buf++ = 16; |
| put_unaligned_be64(blocks, buf); |
| buf += 12; |
| put_unaligned_be32(block_size, buf); |
| |
| return 17; |
| } |
| |
| static sense_reason_t spc_emulate_modesense(struct se_cmd *cmd) |
| { |
| struct se_device *dev = cmd->se_dev; |
| char *cdb = cmd->t_task_cdb; |
| unsigned char buf[SE_MODE_PAGE_BUF], *rbuf; |
| int type = dev->transport->get_device_type(dev); |
| int ten = (cmd->t_task_cdb[0] == MODE_SENSE_10); |
| bool dbd = !!(cdb[1] & 0x08); |
| bool llba = ten ? !!(cdb[1] & 0x10) : false; |
| u8 pc = cdb[2] >> 6; |
| u8 page = cdb[2] & 0x3f; |
| u8 subpage = cdb[3]; |
| int length = 0; |
| int ret; |
| int i; |
| |
| memset(buf, 0, SE_MODE_PAGE_BUF); |
| |
| /* |
| * Skip over MODE DATA LENGTH + MEDIUM TYPE fields to byte 3 for |
| * MODE_SENSE_10 and byte 2 for MODE_SENSE (6). |
| */ |
| length = ten ? 3 : 2; |
| |
| /* DEVICE-SPECIFIC PARAMETER */ |
| if (cmd->se_lun->lun_access_ro || target_lun_is_rdonly(cmd)) |
| spc_modesense_write_protect(&buf[length], type); |
| |
| /* |
| * 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; |
| |
| /* BLOCK DESCRIPTOR */ |
| |
| /* |
| * For now we only include a block descriptor for disk (SBC) |
| * devices; other command sets use a slightly different format. |
| */ |
| if (!dbd && type == TYPE_DISK) { |
| u64 blocks = dev->transport->get_blocks(dev); |
| u32 block_size = dev->dev_attrib.block_size; |
| |
| if (ten) { |
| if (llba) { |
| length += spc_modesense_long_blockdesc(&buf[length], |
| blocks, block_size); |
| } else { |
| length += 3; |
| length += spc_modesense_blockdesc(&buf[length], |
| blocks, block_size); |
| } |
| } else { |
| length += spc_modesense_blockdesc(&buf[length], blocks, |
| block_size); |
| } |
| } else { |
| if (ten) |
| length += 4; |
| else |
| length += 1; |
| } |
| |
| if (page == 0x3f) { |
| if (subpage != 0x00 && subpage != 0xff) { |
| pr_warn("MODE_SENSE: Invalid subpage code: 0x%02x\n", subpage); |
| return TCM_INVALID_CDB_FIELD; |
| } |
| |
| for (i = 0; i < ARRAY_SIZE(modesense_handlers); ++i) { |
| /* |
| * Tricky way to say all subpage 00h for |
| * subpage==0, all subpages for subpage==0xff |
| * (and we just checked above that those are |
| * the only two possibilities). |
| */ |
| if ((modesense_handlers[i].subpage & ~subpage) == 0) { |
| ret = modesense_handlers[i].emulate(cmd, pc, &buf[length]); |
| if (!ten && length + ret >= 255) |
| break; |
| length += ret; |
| } |
| } |
| |
| goto set_length; |
| } |
| |
| 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(cmd, pc, &buf[length]); |
| goto set_length; |
| } |
| |
| /* |
| * We don't intend to implement: |
| * - obsolete page 03h "format parameters" (checked by Solaris) |
| */ |
| if (page != 0x03) |
| pr_err("MODE SENSE: unimplemented page/subpage: 0x%02x/0x%02x\n", |
| page, subpage); |
| |
| return TCM_UNKNOWN_MODE_PAGE; |
| |
| set_length: |
| if (ten) |
| put_unaligned_be16(length - 2, buf); |
| else |
| buf[0] = length - 1; |
| |
| rbuf = transport_kmap_data_sg(cmd); |
| if (rbuf) { |
| memcpy(rbuf, buf, min_t(u32, SE_MODE_PAGE_BUF, cmd->data_length)); |
| transport_kunmap_data_sg(cmd); |
| } |
| |
| target_complete_cmd_with_length(cmd, GOOD, length); |
| return 0; |
| } |
| |
| static sense_reason_t spc_emulate_modeselect(struct se_cmd *cmd) |
| { |
| char *cdb = cmd->t_task_cdb; |
| bool ten = cdb[0] == MODE_SELECT_10; |
| int off = ten ? 8 : 4; |
| bool pf = !!(cdb[1] & 0x10); |
| u8 page, subpage; |
| unsigned char *buf; |
| unsigned char tbuf[SE_MODE_PAGE_BUF]; |
| int length; |
| sense_reason_t ret = 0; |
| int i; |
| |
| if (!cmd->data_length) { |
| target_complete_cmd(cmd, GOOD); |
| return 0; |
| } |
| |
| if (cmd->data_length < off + 2) |
| return TCM_PARAMETER_LIST_LENGTH_ERROR; |
| |
| buf = transport_kmap_data_sg(cmd); |
| if (!buf) |
| return TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; |
| |
| if (!pf) { |
| ret = TCM_INVALID_CDB_FIELD; |
| goto out; |
| } |
| |
| page = buf[off] & 0x3f; |
| subpage = buf[off] & 0x40 ? buf[off + 1] : 0; |
| |
| for (i = 0; i < ARRAY_SIZE(modesense_handlers); ++i) |
| if (modesense_handlers[i].page == page && |
| modesense_handlers[i].subpage == subpage) { |
| memset(tbuf, 0, SE_MODE_PAGE_BUF); |
| length = modesense_handlers[i].emulate(cmd, 0, tbuf); |
| goto check_contents; |
| } |
| |
| ret = TCM_UNKNOWN_MODE_PAGE; |
| goto out; |
| |
| check_contents: |
| if (cmd->data_length < off + length) { |
| ret = TCM_PARAMETER_LIST_LENGTH_ERROR; |
| goto out; |
| } |
| |
| if (memcmp(buf + off, tbuf, length)) |
| ret = TCM_INVALID_PARAMETER_LIST; |
| |
| out: |
| transport_kunmap_data_sg(cmd); |
| |
| if (!ret) |
| target_complete_cmd(cmd, GOOD); |
| return ret; |
| } |
| |
| static sense_reason_t spc_emulate_request_sense(struct se_cmd *cmd) |
| { |
| unsigned char *cdb = cmd->t_task_cdb; |
| 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); |
| |
| if (cdb[1] & 0x01) { |
| pr_err("REQUEST_SENSE description emulation not" |
| " supported\n"); |
| return TCM_INVALID_CDB_FIELD; |
| } |
| |
| rbuf = transport_kmap_data_sg(cmd); |
| if (!rbuf) |
| return TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; |
| |
| 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); |
| return 0; |
| } |
| |
| 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; |
| __be32 len; |
| |
| buf = transport_kmap_data_sg(cmd); |
| if (cmd->data_length && !buf) |
| return TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; |
| |
| /* |
| * If no struct se_session pointer is present, this struct se_cmd is |
| * coming via a target_core_mod PASSTHROUGH op, and not through |
| * a $FABRIC_MOD. In that case, report LUN=0 only. |
| */ |
| if (!sess) |
| goto done; |
| |
| 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 >= cmd->data_length) |
| continue; |
| |
| int_to_scsilun(deve->mapped_lun, &slun); |
| memcpy(buf + offset, &slun, |
| min(8u, cmd->data_length - offset)); |
| offset += 8; |
| } |
| rcu_read_unlock(); |
| |
| /* |
| * See SPC3 r07, page 159. |
| */ |
| done: |
| /* |
| * 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; |
| } |
| |
| 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, GOOD, 8 + lun_count * 8); |
| return 0; |
| } |
| EXPORT_SYMBOL(spc_emulate_report_luns); |
| |
| static sense_reason_t |
| spc_emulate_testunitready(struct se_cmd *cmd) |
| { |
| target_complete_cmd(cmd, GOOD); |
| return 0; |
| } |
| |
| sense_reason_t |
| spc_parse_cdb(struct se_cmd *cmd, unsigned int *size) |
| { |
| struct se_device *dev = cmd->se_dev; |
| unsigned char *cdb = cmd->t_task_cdb; |
| |
| if (!dev->dev_attrib.emulate_pr && |
| ((cdb[0] == PERSISTENT_RESERVE_IN) || |
| (cdb[0] == PERSISTENT_RESERVE_OUT) || |
| (cdb[0] == RELEASE || cdb[0] == RELEASE_10) || |
| (cdb[0] == RESERVE || cdb[0] == RESERVE_10))) { |
| return TCM_UNSUPPORTED_SCSI_OPCODE; |
| } |
| |
| switch (cdb[0]) { |
| case MODE_SELECT: |
| *size = cdb[4]; |
| cmd->execute_cmd = spc_emulate_modeselect; |
| break; |
| case MODE_SELECT_10: |
| *size = get_unaligned_be16(&cdb[7]); |
| cmd->execute_cmd = spc_emulate_modeselect; |
| break; |
| case MODE_SENSE: |
| *size = cdb[4]; |
| cmd->execute_cmd = spc_emulate_modesense; |
| break; |
| case MODE_SENSE_10: |
| *size = get_unaligned_be16(&cdb[7]); |
| cmd->execute_cmd = spc_emulate_modesense; |
| break; |
| case LOG_SELECT: |
| case LOG_SENSE: |
| *size = get_unaligned_be16(&cdb[7]); |
| break; |
| case PERSISTENT_RESERVE_IN: |
| *size = get_unaligned_be16(&cdb[7]); |
| cmd->execute_cmd = target_scsi3_emulate_pr_in; |
| break; |
| case PERSISTENT_RESERVE_OUT: |
| *size = get_unaligned_be32(&cdb[5]); |
| cmd->execute_cmd = target_scsi3_emulate_pr_out; |
| break; |
| case RELEASE: |
| case RELEASE_10: |
| if (cdb[0] == RELEASE_10) |
| *size = get_unaligned_be16(&cdb[7]); |
| else |
| *size = cmd->data_length; |
| |
| cmd->execute_cmd = target_scsi2_reservation_release; |
| break; |
| case RESERVE: |
| 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 = get_unaligned_be16(&cdb[7]); |
| else |
| *size = cmd->data_length; |
| |
| cmd->execute_cmd = target_scsi2_reservation_reserve; |
| break; |
| case REQUEST_SENSE: |
| *size = cdb[4]; |
| cmd->execute_cmd = spc_emulate_request_sense; |
| break; |
| case INQUIRY: |
| *size = get_unaligned_be16(&cdb[3]); |
| |
| /* |
| * Do implicit HEAD_OF_QUEUE processing for INQUIRY. |
| * See spc4r17 section 5.3 |
| */ |
| cmd->sam_task_attr = TCM_HEAD_TAG; |
| cmd->execute_cmd = spc_emulate_inquiry; |
| break; |
| case SECURITY_PROTOCOL_IN: |
| case SECURITY_PROTOCOL_OUT: |
| *size = get_unaligned_be32(&cdb[6]); |
| break; |
| case EXTENDED_COPY: |
| *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 = get_unaligned_be32(&cdb[10]); |
| break; |
| case RECEIVE_DIAGNOSTIC: |
| case SEND_DIAGNOSTIC: |
| *size = get_unaligned_be16(&cdb[3]); |
| break; |
| case WRITE_BUFFER: |
| *size = get_unaligned_be24(&cdb[6]); |
| break; |
| case REPORT_LUNS: |
| cmd->execute_cmd = spc_emulate_report_luns; |
| *size = get_unaligned_be32(&cdb[6]); |
| /* |
| * Do implicit HEAD_OF_QUEUE processing for REPORT_LUNS |
| * See spc4r17 section 5.3 |
| */ |
| cmd->sam_task_attr = TCM_HEAD_TAG; |
| break; |
| case TEST_UNIT_READY: |
| cmd->execute_cmd = spc_emulate_testunitready; |
| *size = 0; |
| break; |
| case MAINTENANCE_IN: |
| if (dev->transport->get_device_type(dev) != TYPE_ROM) { |
| /* |
| * MAINTENANCE_IN from SCC-2 |
| * Check for emulated MI_REPORT_TARGET_PGS |
| */ |
| if ((cdb[1] & 0x1f) == MI_REPORT_TARGET_PGS) { |
| cmd->execute_cmd = |
| target_emulate_report_target_port_groups; |
| } |
| *size = get_unaligned_be32(&cdb[6]); |
| } else { |
| /* |
| * GPCMD_SEND_KEY from multi media commands |
| */ |
| *size = get_unaligned_be16(&cdb[8]); |
| } |
| break; |
| case MAINTENANCE_OUT: |
| if (dev->transport->get_device_type(dev) != TYPE_ROM) { |
| /* |
| * MAINTENANCE_OUT from SCC-2 |
| * Check for emulated MO_SET_TARGET_PGS. |
| */ |
| if (cdb[1] == MO_SET_TARGET_PGS) { |
| cmd->execute_cmd = |
| target_emulate_set_target_port_groups; |
| } |
| *size = get_unaligned_be32(&cdb[6]); |
| } else { |
| /* |
| * GPCMD_SEND_KEY from multi media commands |
| */ |
| *size = get_unaligned_be16(&cdb[8]); |
| } |
| break; |
| default: |
| return TCM_UNSUPPORTED_SCSI_OPCODE; |
| } |
| |
| return 0; |
| } |
| EXPORT_SYMBOL(spc_parse_cdb); |