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1441 lines
38 KiB
1441 lines
38 KiB
// SPDX-License-Identifier: GPL-2.0-or-later |
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/* |
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* SCSI Primary Commands (SPC) parsing and emulation. |
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* |
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* (c) Copyright 2002-2013 Datera, Inc. |
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* |
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* Nicholas A. Bellinger <[email protected]> |
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*/ |
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|
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#include <linux/kernel.h> |
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#include <linux/module.h> |
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#include <asm/unaligned.h> |
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|
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#include <scsi/scsi_proto.h> |
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#include <scsi/scsi_common.h> |
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#include <scsi/scsi_tcq.h> |
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|
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#include <target/target_core_base.h> |
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#include <target/target_core_backend.h> |
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#include <target/target_core_fabric.h> |
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|
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#include "target_core_internal.h" |
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#include "target_core_alua.h" |
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#include "target_core_pr.h" |
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#include "target_core_ua.h" |
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#include "target_core_xcopy.h" |
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|
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static void spc_fill_alua_data(struct se_lun *lun, unsigned char *buf) |
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{ |
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struct t10_alua_tg_pt_gp *tg_pt_gp; |
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|
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/* |
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* Set SCCS for MAINTENANCE_IN + REPORT_TARGET_PORT_GROUPS. |
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*/ |
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buf[5] = 0x80; |
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|
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/* |
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* Set TPGS field for explicit and/or implicit ALUA access type |
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* and opteration. |
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* |
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* See spc4r17 section 6.4.2 Table 135 |
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*/ |
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spin_lock(&lun->lun_tg_pt_gp_lock); |
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tg_pt_gp = lun->lun_tg_pt_gp; |
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if (tg_pt_gp) |
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buf[5] |= tg_pt_gp->tg_pt_gp_alua_access_type; |
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spin_unlock(&lun->lun_tg_pt_gp_lock); |
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} |
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|
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sense_reason_t |
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spc_emulate_inquiry_std(struct se_cmd *cmd, unsigned char *buf) |
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{ |
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struct se_lun *lun = cmd->se_lun; |
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struct se_device *dev = cmd->se_dev; |
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struct se_session *sess = cmd->se_sess; |
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|
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/* Set RMB (removable media) for tape devices */ |
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if (dev->transport->get_device_type(dev) == TYPE_TAPE) |
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buf[1] = 0x80; |
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|
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buf[2] = 0x05; /* SPC-3 */ |
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|
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/* |
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* NORMACA and HISUP = 0, RESPONSE DATA FORMAT = 2 |
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* |
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* SPC4 says: |
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* A RESPONSE DATA FORMAT field set to 2h indicates that the |
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* standard INQUIRY data is in the format defined in this |
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* standard. Response data format values less than 2h are |
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* obsolete. Response data format values greater than 2h are |
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* reserved. |
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*/ |
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buf[3] = 2; |
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|
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/* |
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* Enable SCCS and TPGS fields for Emulated ALUA |
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*/ |
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spc_fill_alua_data(lun, buf); |
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|
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/* |
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* Set Third-Party Copy (3PC) bit to indicate support for EXTENDED_COPY |
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*/ |
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if (dev->dev_attrib.emulate_3pc) |
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buf[5] |= 0x8; |
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/* |
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* Set Protection (PROTECT) bit when DIF has been enabled on the |
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* device, and the fabric supports VERIFY + PASS. Also report |
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* PROTECT=1 if sess_prot_type has been configured to allow T10-PI |
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* to unprotected devices. |
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*/ |
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if (sess->sup_prot_ops & (TARGET_PROT_DIN_PASS | TARGET_PROT_DOUT_PASS)) { |
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if (dev->dev_attrib.pi_prot_type || cmd->se_sess->sess_prot_type) |
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buf[5] |= 0x1; |
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} |
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|
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buf[7] = 0x2; /* CmdQue=1 */ |
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|
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/* |
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* ASCII data fields described as being left-aligned shall have any |
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* unused bytes at the end of the field (i.e., highest offset) and the |
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* unused bytes shall be filled with ASCII space characters (20h). |
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*/ |
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memset(&buf[8], 0x20, |
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INQUIRY_VENDOR_LEN + INQUIRY_MODEL_LEN + INQUIRY_REVISION_LEN); |
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memcpy(&buf[8], dev->t10_wwn.vendor, |
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strnlen(dev->t10_wwn.vendor, INQUIRY_VENDOR_LEN)); |
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memcpy(&buf[16], dev->t10_wwn.model, |
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strnlen(dev->t10_wwn.model, INQUIRY_MODEL_LEN)); |
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memcpy(&buf[32], dev->t10_wwn.revision, |
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strnlen(dev->t10_wwn.revision, INQUIRY_REVISION_LEN)); |
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buf[4] = 31; /* Set additional length to 31 */ |
|
|
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return 0; |
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} |
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EXPORT_SYMBOL(spc_emulate_inquiry_std); |
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|
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/* unit serial number */ |
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static sense_reason_t |
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spc_emulate_evpd_80(struct se_cmd *cmd, unsigned char *buf) |
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{ |
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struct se_device *dev = cmd->se_dev; |
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u16 len; |
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|
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if (dev->dev_flags & DF_EMULATED_VPD_UNIT_SERIAL) { |
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len = sprintf(&buf[4], "%s", dev->t10_wwn.unit_serial); |
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len++; /* Extra Byte for NULL Terminator */ |
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buf[3] = len; |
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} |
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return 0; |
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} |
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|
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void spc_parse_naa_6h_vendor_specific(struct se_device *dev, |
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unsigned char *buf) |
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{ |
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unsigned char *p = &dev->t10_wwn.unit_serial[0]; |
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int cnt; |
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bool next = true; |
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|
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/* |
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* Generate up to 36 bits of VENDOR SPECIFIC IDENTIFIER starting on |
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* byte 3 bit 3-0 for NAA IEEE Registered Extended DESIGNATOR field |
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* format, followed by 64 bits of VENDOR SPECIFIC IDENTIFIER EXTENSION |
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* to complete the payload. These are based from VPD=0x80 PRODUCT SERIAL |
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* NUMBER set via vpd_unit_serial in target_core_configfs.c to ensure |
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* per device uniqeness. |
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*/ |
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for (cnt = 0; *p && cnt < 13; p++) { |
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int val = hex_to_bin(*p); |
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|
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if (val < 0) |
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continue; |
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|
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if (next) { |
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next = false; |
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buf[cnt++] |= val; |
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} else { |
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next = true; |
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buf[cnt] = val << 4; |
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} |
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} |
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} |
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|
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/* |
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* Device identification VPD, for a complete list of |
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* DESIGNATOR TYPEs see spc4r17 Table 459. |
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*/ |
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sense_reason_t |
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spc_emulate_evpd_83(struct se_cmd *cmd, unsigned char *buf) |
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{ |
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struct se_device *dev = cmd->se_dev; |
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struct se_lun *lun = cmd->se_lun; |
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struct se_portal_group *tpg = NULL; |
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struct t10_alua_lu_gp_member *lu_gp_mem; |
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struct t10_alua_tg_pt_gp *tg_pt_gp; |
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unsigned char *prod = &dev->t10_wwn.model[0]; |
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u32 prod_len; |
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u32 unit_serial_len, off = 0; |
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u16 len = 0, id_len; |
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|
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off = 4; |
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|
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/* |
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* NAA IEEE Registered Extended Assigned designator format, see |
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* spc4r17 section 7.7.3.6.5 |
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* |
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* We depend upon a target_core_mod/ConfigFS provided |
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* /sys/kernel/config/target/core/$HBA/$DEV/wwn/vpd_unit_serial |
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* value in order to return the NAA id. |
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*/ |
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if (!(dev->dev_flags & DF_EMULATED_VPD_UNIT_SERIAL)) |
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goto check_t10_vend_desc; |
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|
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/* CODE SET == Binary */ |
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buf[off++] = 0x1; |
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|
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/* Set ASSOCIATION == addressed logical unit: 0)b */ |
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buf[off] = 0x00; |
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|
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/* Identifier/Designator type == NAA identifier */ |
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buf[off++] |= 0x3; |
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off++; |
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|
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/* Identifier/Designator length */ |
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buf[off++] = 0x10; |
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|
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/* |
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* Start NAA IEEE Registered Extended Identifier/Designator |
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*/ |
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buf[off++] = (0x6 << 4); |
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|
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/* |
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* Use OpenFabrics IEEE Company ID: 00 14 05 |
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*/ |
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buf[off++] = 0x01; |
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buf[off++] = 0x40; |
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buf[off] = (0x5 << 4); |
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|
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/* |
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* Return ConfigFS Unit Serial Number information for |
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* VENDOR_SPECIFIC_IDENTIFIER and |
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* VENDOR_SPECIFIC_IDENTIFIER_EXTENTION |
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*/ |
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spc_parse_naa_6h_vendor_specific(dev, &buf[off]); |
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|
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len = 20; |
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off = (len + 4); |
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|
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check_t10_vend_desc: |
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/* |
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* T10 Vendor Identifier Page, see spc4r17 section 7.7.3.4 |
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*/ |
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id_len = 8; /* For Vendor field */ |
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prod_len = 4; /* For VPD Header */ |
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prod_len += 8; /* For Vendor field */ |
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prod_len += strlen(prod); |
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prod_len++; /* For : */ |
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|
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if (dev->dev_flags & DF_EMULATED_VPD_UNIT_SERIAL) { |
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unit_serial_len = strlen(&dev->t10_wwn.unit_serial[0]); |
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unit_serial_len++; /* For NULL Terminator */ |
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|
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id_len += sprintf(&buf[off+12], "%s:%s", prod, |
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&dev->t10_wwn.unit_serial[0]); |
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} |
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buf[off] = 0x2; /* ASCII */ |
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buf[off+1] = 0x1; /* T10 Vendor ID */ |
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buf[off+2] = 0x0; |
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/* left align Vendor ID and pad with spaces */ |
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memset(&buf[off+4], 0x20, INQUIRY_VENDOR_LEN); |
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memcpy(&buf[off+4], dev->t10_wwn.vendor, |
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strnlen(dev->t10_wwn.vendor, INQUIRY_VENDOR_LEN)); |
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/* Extra Byte for NULL Terminator */ |
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id_len++; |
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/* Identifier Length */ |
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buf[off+3] = id_len; |
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/* Header size for Designation descriptor */ |
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len += (id_len + 4); |
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off += (id_len + 4); |
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|
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if (1) { |
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struct t10_alua_lu_gp *lu_gp; |
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u32 padding, scsi_name_len, scsi_target_len; |
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u16 lu_gp_id = 0; |
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u16 tg_pt_gp_id = 0; |
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u16 tpgt; |
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|
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tpg = lun->lun_tpg; |
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/* |
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* Relative target port identifer, see spc4r17 |
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* section 7.7.3.7 |
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* |
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* Get the PROTOCOL IDENTIFIER as defined by spc4r17 |
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* section 7.5.1 Table 362 |
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*/ |
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buf[off] = tpg->proto_id << 4; |
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buf[off++] |= 0x1; /* CODE SET == Binary */ |
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buf[off] = 0x80; /* Set PIV=1 */ |
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/* Set ASSOCIATION == target port: 01b */ |
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buf[off] |= 0x10; |
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/* DESIGNATOR TYPE == Relative target port identifer */ |
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buf[off++] |= 0x4; |
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off++; /* Skip over Reserved */ |
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buf[off++] = 4; /* DESIGNATOR LENGTH */ |
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/* Skip over Obsolete field in RTPI payload |
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* in Table 472 */ |
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off += 2; |
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put_unaligned_be16(lun->lun_rtpi, &buf[off]); |
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off += 2; |
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len += 8; /* Header size + Designation descriptor */ |
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/* |
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* Target port group identifier, see spc4r17 |
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* section 7.7.3.8 |
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* |
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* Get the PROTOCOL IDENTIFIER as defined by spc4r17 |
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* section 7.5.1 Table 362 |
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*/ |
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spin_lock(&lun->lun_tg_pt_gp_lock); |
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tg_pt_gp = lun->lun_tg_pt_gp; |
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if (!tg_pt_gp) { |
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spin_unlock(&lun->lun_tg_pt_gp_lock); |
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goto check_lu_gp; |
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} |
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tg_pt_gp_id = tg_pt_gp->tg_pt_gp_id; |
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spin_unlock(&lun->lun_tg_pt_gp_lock); |
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|
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buf[off] = tpg->proto_id << 4; |
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buf[off++] |= 0x1; /* CODE SET == Binary */ |
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buf[off] = 0x80; /* Set PIV=1 */ |
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/* Set ASSOCIATION == target port: 01b */ |
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buf[off] |= 0x10; |
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/* DESIGNATOR TYPE == Target port group identifier */ |
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buf[off++] |= 0x5; |
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off++; /* Skip over Reserved */ |
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buf[off++] = 4; /* DESIGNATOR LENGTH */ |
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off += 2; /* Skip over Reserved Field */ |
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put_unaligned_be16(tg_pt_gp_id, &buf[off]); |
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off += 2; |
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len += 8; /* Header size + Designation descriptor */ |
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/* |
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* Logical Unit Group identifier, see spc4r17 |
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* section 7.7.3.8 |
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*/ |
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check_lu_gp: |
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lu_gp_mem = dev->dev_alua_lu_gp_mem; |
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if (!lu_gp_mem) |
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goto check_scsi_name; |
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|
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spin_lock(&lu_gp_mem->lu_gp_mem_lock); |
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lu_gp = lu_gp_mem->lu_gp; |
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if (!lu_gp) { |
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spin_unlock(&lu_gp_mem->lu_gp_mem_lock); |
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goto check_scsi_name; |
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} |
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lu_gp_id = lu_gp->lu_gp_id; |
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spin_unlock(&lu_gp_mem->lu_gp_mem_lock); |
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|
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buf[off++] |= 0x1; /* CODE SET == Binary */ |
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/* DESIGNATOR TYPE == Logical Unit Group identifier */ |
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buf[off++] |= 0x6; |
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off++; /* Skip over Reserved */ |
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buf[off++] = 4; /* DESIGNATOR LENGTH */ |
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off += 2; /* Skip over Reserved Field */ |
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put_unaligned_be16(lu_gp_id, &buf[off]); |
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off += 2; |
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len += 8; /* Header size + Designation descriptor */ |
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/* |
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* SCSI name string designator, see spc4r17 |
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* section 7.7.3.11 |
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* |
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* Get the PROTOCOL IDENTIFIER as defined by spc4r17 |
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* section 7.5.1 Table 362 |
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*/ |
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check_scsi_name: |
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buf[off] = tpg->proto_id << 4; |
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buf[off++] |= 0x3; /* CODE SET == UTF-8 */ |
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buf[off] = 0x80; /* Set PIV=1 */ |
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/* Set ASSOCIATION == target port: 01b */ |
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buf[off] |= 0x10; |
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/* DESIGNATOR TYPE == SCSI name string */ |
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buf[off++] |= 0x8; |
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off += 2; /* Skip over Reserved and length */ |
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/* |
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* SCSI name string identifer containing, $FABRIC_MOD |
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* dependent information. For LIO-Target and iSCSI |
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* Target Port, this means "<iSCSI name>,t,0x<TPGT> in |
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* UTF-8 encoding. |
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*/ |
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tpgt = tpg->se_tpg_tfo->tpg_get_tag(tpg); |
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scsi_name_len = sprintf(&buf[off], "%s,t,0x%04x", |
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tpg->se_tpg_tfo->tpg_get_wwn(tpg), tpgt); |
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scsi_name_len += 1 /* Include NULL terminator */; |
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/* |
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* The null-terminated, null-padded (see 4.4.2) SCSI |
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* NAME STRING field contains a UTF-8 format string. |
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* The number of bytes in the SCSI NAME STRING field |
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* (i.e., the value in the DESIGNATOR LENGTH field) |
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* shall be no larger than 256 and shall be a multiple |
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* of four. |
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*/ |
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padding = ((-scsi_name_len) & 3); |
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if (padding) |
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scsi_name_len += padding; |
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if (scsi_name_len > 256) |
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scsi_name_len = 256; |
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|
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buf[off-1] = scsi_name_len; |
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off += scsi_name_len; |
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/* Header size + Designation descriptor */ |
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len += (scsi_name_len + 4); |
|
|
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/* |
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* Target device designator |
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*/ |
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buf[off] = tpg->proto_id << 4; |
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buf[off++] |= 0x3; /* CODE SET == UTF-8 */ |
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buf[off] = 0x80; /* Set PIV=1 */ |
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/* Set ASSOCIATION == target device: 10b */ |
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buf[off] |= 0x20; |
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/* DESIGNATOR TYPE == SCSI name string */ |
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buf[off++] |= 0x8; |
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off += 2; /* Skip over Reserved and length */ |
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/* |
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* SCSI name string identifer containing, $FABRIC_MOD |
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* dependent information. For LIO-Target and iSCSI |
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* Target Port, this means "<iSCSI name>" in |
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* UTF-8 encoding. |
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*/ |
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scsi_target_len = sprintf(&buf[off], "%s", |
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tpg->se_tpg_tfo->tpg_get_wwn(tpg)); |
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scsi_target_len += 1 /* Include NULL terminator */; |
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/* |
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* The null-terminated, null-padded (see 4.4.2) SCSI |
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* NAME STRING field contains a UTF-8 format string. |
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* The number of bytes in the SCSI NAME STRING field |
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* (i.e., the value in the DESIGNATOR LENGTH field) |
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* shall be no larger than 256 and shall be a multiple |
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* of four. |
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*/ |
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padding = ((-scsi_target_len) & 3); |
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if (padding) |
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scsi_target_len += padding; |
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if (scsi_target_len > 256) |
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scsi_target_len = 256; |
|
|
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buf[off-1] = scsi_target_len; |
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off += scsi_target_len; |
|
|
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/* Header size + Designation descriptor */ |
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len += (scsi_target_len + 4); |
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} |
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put_unaligned_be16(len, &buf[2]); /* Page Length for VPD 0x83 */ |
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return 0; |
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} |
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EXPORT_SYMBOL(spc_emulate_evpd_83); |
|
|
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/* Extended INQUIRY Data VPD Page */ |
|
static sense_reason_t |
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spc_emulate_evpd_86(struct se_cmd *cmd, unsigned char *buf) |
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{ |
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struct se_device *dev = cmd->se_dev; |
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struct se_session *sess = cmd->se_sess; |
|
|
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buf[3] = 0x3c; |
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/* |
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* Set GRD_CHK + REF_CHK for TYPE1 protection, or GRD_CHK |
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* only for TYPE3 protection. |
|
*/ |
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if (sess->sup_prot_ops & (TARGET_PROT_DIN_PASS | TARGET_PROT_DOUT_PASS)) { |
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if (dev->dev_attrib.pi_prot_type == TARGET_DIF_TYPE1_PROT || |
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cmd->se_sess->sess_prot_type == TARGET_DIF_TYPE1_PROT) |
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buf[4] = 0x5; |
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else if (dev->dev_attrib.pi_prot_type == TARGET_DIF_TYPE3_PROT || |
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cmd->se_sess->sess_prot_type == TARGET_DIF_TYPE3_PROT) |
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buf[4] = 0x4; |
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} |
|
|
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/* logical unit supports type 1 and type 3 protection */ |
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if ((dev->transport->get_device_type(dev) == TYPE_DISK) && |
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(sess->sup_prot_ops & (TARGET_PROT_DIN_PASS | TARGET_PROT_DOUT_PASS)) && |
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(dev->dev_attrib.pi_prot_type || cmd->se_sess->sess_prot_type)) { |
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buf[4] |= (0x3 << 3); |
|
} |
|
|
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/* Set HEADSUP, ORDSUP, SIMPSUP */ |
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buf[5] = 0x07; |
|
|
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/* If WriteCache emulation is enabled, set V_SUP */ |
|
if (target_check_wce(dev)) |
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buf[6] = 0x01; |
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/* If an LBA map is present set R_SUP */ |
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spin_lock(&cmd->se_dev->t10_alua.lba_map_lock); |
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if (!list_empty(&dev->t10_alua.lba_map_list)) |
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buf[8] = 0x10; |
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spin_unlock(&cmd->se_dev->t10_alua.lba_map_lock); |
|
return 0; |
|
} |
|
|
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/* Block Limits VPD page */ |
|
static sense_reason_t |
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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. |
|
*/ |
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if (dev->dev_attrib.emulate_tpu || dev->dev_attrib.emulate_tpws) |
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have_tp = 1; |
|
|
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buf[0] = dev->transport->get_device_type(dev); |
|
buf[3] = have_tp ? 0x3c : 0x10; |
|
|
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/* 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 |
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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; |
|
struct se_portal_group *tpg = cmd->se_lun->lun_tpg; |
|
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; |
|
} |
|
|
|
if (dev == rcu_access_pointer(tpg->tpg_virt_lun0->lun_se_dev)) |
|
buf[0] = 0x3f; /* Not connected */ |
|
else |
|
buf[0] = dev->transport->get_device_type(dev); |
|
|
|
if (!(cdb[1] & 0x1)) { |
|
if (cdb[2]) { |
|
pr_err("INQUIRY with EVPD==0 but PAGE CODE=%02x\n", |
|
cdb[2]); |
|
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);
|
|
|