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linux/drivers/target/target_core_spc.c
Martin K. Petersen 7907ad748b Merge patch series "Use block pr_ops in LIO" 
Mike Christie <michael.christie@oracle.com> says:

The patches in this thread allow us to use the block pr_ops with LIO's
target_core_iblock module to support cluster applications in VMs. They
were built over Linus's tree. They also apply over linux-next and
Martin's tree and Jens's trees.

Currently, to use windows clustering or linux clustering (pacemaker +
cluster labs scsi fence agents) in VMs with LIO and vhost-scsi, you
have to use tcmu or pscsi or use a cluster aware FS/framework for the
LIO pr file. Setting up a cluster FS/framework is pain and waste when
your real backend device is already a distributed device, and pscsi
and tcmu are nice for specific use cases, but iblock gives you the
best performance and allows you to use stacked devices like
dm-multipath. So these patches allow iblock to work like pscsi/tcmu
where they can pass a PR command to the backend module. And then
iblock will use the pr_ops to pass the PR command to the real devices
similar to what we do for unmap today.

The patches are separated in the following groups:

Patch 1 - 2:

 - Add block layer callouts for reading reservations and rename reservation
   error code.

Patch 3 - 5:

 - SCSI support for new callouts.

Patch 6:

 - DM support for new callouts.

Patch 7 - 13:

 - NVMe support for new callouts.

Patch 14 - 18:

 - LIO support for new callouts.

This patchset has been tested with the libiscsi PGR ops and with
window's failover cluster verification test. Note that for scsi
backend devices we need this patchset:

https://lore.kernel.org/linux-scsi/20230123221046.125483-1-michael.christie@oracle.com/T/#m4834a643ffb5bac2529d65d40906d3cfbdd9b1b7

to handle UAs. To reduce the size of this patchset that's being done
separately to make reviewing easier. And to make merging easier this
patchset and the one above do not have any conflicts so can be merged
in different trees.

Link: https://lore.kernel.org/r/20230407200551.12660-1-michael.christie@oracle.com
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
2023-05-22 16:35:02 -04:00

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// 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
*/
rcu_read_lock();
tg_pt_gp = rcu_dereference(lun->lun_tg_pt_gp);
if (tg_pt_gp)
buf[5] |= tg_pt_gp->tg_pt_gp_alua_access_type;
rcu_read_unlock();
}
static u16
spc_find_scsi_transport_vd(int proto_id)
{
switch (proto_id) {
case SCSI_PROTOCOL_FCP:
return SCSI_VERSION_DESCRIPTOR_FCP4;
case SCSI_PROTOCOL_ISCSI:
return SCSI_VERSION_DESCRIPTOR_ISCSI;
case SCSI_PROTOCOL_SAS:
return SCSI_VERSION_DESCRIPTOR_SAS3;
case SCSI_PROTOCOL_SBP:
return SCSI_VERSION_DESCRIPTOR_SBP3;
case SCSI_PROTOCOL_SRP:
return SCSI_VERSION_DESCRIPTOR_SRP;
default:
pr_warn("Cannot find VERSION DESCRIPTOR value for unknown SCSI"
" transport PROTOCOL IDENTIFIER %#x\n", proto_id);
return 0;
}
}
sense_reason_t
spc_emulate_inquiry_std(struct se_cmd *cmd, unsigned char *buf)
{
struct se_lun *lun = cmd->se_lun;
struct se_portal_group *tpg = lun->lun_tpg;
struct se_device *dev = cmd->se_dev;
struct se_session *sess = cmd->se_sess;
/* Set RMB (removable media) for tape devices */
if (dev->transport->get_device_type(dev) == TYPE_TAPE)
buf[1] = 0x80;
buf[2] = 0x06; /* SPC-4 */
/*
* 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;
}
/*
* Set MULTIP bit to indicate presence of multiple SCSI target ports
*/
if (dev->export_count > 1)
buf[6] |= 0x10;
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));
/*
* Set the VERSION DESCRIPTOR fields
*/
put_unaligned_be16(SCSI_VERSION_DESCRIPTOR_SAM5, &buf[58]);
put_unaligned_be16(spc_find_scsi_transport_vd(tpg->proto_id), &buf[60]);
put_unaligned_be16(SCSI_VERSION_DESCRIPTOR_SPC4, &buf[62]);
if (cmd->se_dev->transport->get_device_type(dev) == TYPE_DISK)
put_unaligned_be16(SCSI_VERSION_DESCRIPTOR_SBC3, &buf[64]);
buf[4] = 91; /* Set additional length to 91 */
return 0;
}
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;
}
/*
* Generate NAA IEEE Registered Extended designator
*/
void spc_gen_naa_6h_vendor_specific(struct se_device *dev,
unsigned char *buf)
{
unsigned char *p = &dev->t10_wwn.unit_serial[0];
u32 company_id = dev->t10_wwn.company_id;
int cnt, off = 0;
bool next = true;
/*
* Start NAA IEEE Registered Extended Identifier/Designator
*/
buf[off] = 0x6 << 4;
/* IEEE COMPANY_ID */
buf[off++] |= (company_id >> 20) & 0xf;
buf[off++] = (company_id >> 12) & 0xff;
buf[off++] = (company_id >> 4) & 0xff;
buf[off] = (company_id & 0xf) << 4;
/*
* Generate up to 36 bits of VENDOR SPECIFIC IDENTIFIER starting on
* byte 3 bit 3-0 for NAA IEEE Registered Extended DESIGNATOR field
* format, followed by 64 bits of VENDOR SPECIFIC IDENTIFIER EXTENSION
* 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 = off + 13; *p && off < cnt; p++) {
int val = hex_to_bin(*p);
if (val < 0)
continue;
if (next) {
next = false;
buf[off++] |= val;
} else {
next = true;
buf[off] = 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 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;
/* NAA IEEE Registered Extended designator */
spc_gen_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 */
if (dev->dev_flags & DF_EMULATED_VPD_UNIT_SERIAL)
id_len += sprintf(&buf[off+12], "%s:%s", prod,
&dev->t10_wwn.unit_serial[0]);
buf[off] = 0x2; /* ASCII */
buf[off+1] = 0x1; /* T10 Vendor ID */
buf[off+2] = 0x0;
/* 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_tpg->tpg_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
*/
rcu_read_lock();
tg_pt_gp = rcu_dereference(lun->lun_tg_pt_gp);
if (!tg_pt_gp) {
rcu_read_unlock();
goto check_lu_gp;
}
tg_pt_gp_id = tg_pt_gp->tg_pt_gp_id;
rcu_read_unlock();
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;
u32 io_max_blocks;
/*
* 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;
}
io_max_blocks = mult_frac(dev->dev_attrib.hw_max_sectors,
dev->dev_attrib.hw_block_size,
dev->dev_attrib.block_size);
put_unaligned_be32(min_not_zero(mtl, io_max_blocks), &buf[8]);
/*
* Set OPTIMAL TRANSFER LENGTH
*/
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_debug("Unknown VPD Code: 0x%02x\n", cdb[2]);
ret = TCM_INVALID_CDB_FIELD;
out:
rbuf = transport_kmap_data_sg(cmd);
if (rbuf) {
memcpy(rbuf, buf, min_t(u32, SE_INQUIRY_BUF, cmd->data_length));
transport_kunmap_data_sg(cmd);
}
kfree(buf);
if (!ret)
target_complete_cmd_with_length(cmd, SAM_STAT_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, SAM_STAT_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, SAM_STAT_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, SAM_STAT_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, SAM_STAT_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, SAM_STAT_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, SAM_STAT_GOOD);
return 0;
}
static void set_dpofua_usage_bits(u8 *usage_bits, struct se_device *dev)
{
if (!target_check_fua(dev))
usage_bits[1] &= ~0x18;
else
usage_bits[1] |= 0x18;
}
static void set_dpofua_usage_bits32(u8 *usage_bits, struct se_device *dev)
{
if (!target_check_fua(dev))
usage_bits[10] &= ~0x18;
else
usage_bits[10] |= 0x18;
}
static struct target_opcode_descriptor tcm_opcode_read6 = {
.support = SCSI_SUPPORT_FULL,
.opcode = READ_6,
.cdb_size = 6,
.usage_bits = {READ_6, 0x1f, 0xff, 0xff,
0xff, SCSI_CONTROL_MASK},
};
static struct target_opcode_descriptor tcm_opcode_read10 = {
.support = SCSI_SUPPORT_FULL,
.opcode = READ_10,
.cdb_size = 10,
.usage_bits = {READ_10, 0xf8, 0xff, 0xff,
0xff, 0xff, SCSI_GROUP_NUMBER_MASK, 0xff,
0xff, SCSI_CONTROL_MASK},
.update_usage_bits = set_dpofua_usage_bits,
};
static struct target_opcode_descriptor tcm_opcode_read12 = {
.support = SCSI_SUPPORT_FULL,
.opcode = READ_12,
.cdb_size = 12,
.usage_bits = {READ_12, 0xf8, 0xff, 0xff,
0xff, 0xff, 0xff, 0xff,
0xff, 0xff, SCSI_GROUP_NUMBER_MASK, SCSI_CONTROL_MASK},
.update_usage_bits = set_dpofua_usage_bits,
};
static struct target_opcode_descriptor tcm_opcode_read16 = {
.support = SCSI_SUPPORT_FULL,
.opcode = READ_16,
.cdb_size = 16,
.usage_bits = {READ_16, 0xf8, 0xff, 0xff,
0xff, 0xff, 0xff, 0xff,
0xff, 0xff, 0xff, 0xff,
0xff, 0xff, SCSI_GROUP_NUMBER_MASK, SCSI_CONTROL_MASK},
.update_usage_bits = set_dpofua_usage_bits,
};
static struct target_opcode_descriptor tcm_opcode_write6 = {
.support = SCSI_SUPPORT_FULL,
.opcode = WRITE_6,
.cdb_size = 6,
.usage_bits = {WRITE_6, 0x1f, 0xff, 0xff,
0xff, SCSI_CONTROL_MASK},
};
static struct target_opcode_descriptor tcm_opcode_write10 = {
.support = SCSI_SUPPORT_FULL,
.opcode = WRITE_10,
.cdb_size = 10,
.usage_bits = {WRITE_10, 0xf8, 0xff, 0xff,
0xff, 0xff, SCSI_GROUP_NUMBER_MASK, 0xff,
0xff, SCSI_CONTROL_MASK},
.update_usage_bits = set_dpofua_usage_bits,
};
static struct target_opcode_descriptor tcm_opcode_write_verify10 = {
.support = SCSI_SUPPORT_FULL,
.opcode = WRITE_VERIFY,
.cdb_size = 10,
.usage_bits = {WRITE_VERIFY, 0xf0, 0xff, 0xff,
0xff, 0xff, SCSI_GROUP_NUMBER_MASK, 0xff,
0xff, SCSI_CONTROL_MASK},
.update_usage_bits = set_dpofua_usage_bits,
};
static struct target_opcode_descriptor tcm_opcode_write12 = {
.support = SCSI_SUPPORT_FULL,
.opcode = WRITE_12,
.cdb_size = 12,
.usage_bits = {WRITE_12, 0xf8, 0xff, 0xff,
0xff, 0xff, 0xff, 0xff,
0xff, 0xff, SCSI_GROUP_NUMBER_MASK, SCSI_CONTROL_MASK},
.update_usage_bits = set_dpofua_usage_bits,
};
static struct target_opcode_descriptor tcm_opcode_write16 = {
.support = SCSI_SUPPORT_FULL,
.opcode = WRITE_16,
.cdb_size = 16,
.usage_bits = {WRITE_16, 0xf8, 0xff, 0xff,
0xff, 0xff, 0xff, 0xff,
0xff, 0xff, 0xff, 0xff,
0xff, 0xff, SCSI_GROUP_NUMBER_MASK, SCSI_CONTROL_MASK},
.update_usage_bits = set_dpofua_usage_bits,
};
static struct target_opcode_descriptor tcm_opcode_write_verify16 = {
.support = SCSI_SUPPORT_FULL,
.opcode = WRITE_VERIFY_16,
.cdb_size = 16,
.usage_bits = {WRITE_VERIFY_16, 0xf0, 0xff, 0xff,
0xff, 0xff, 0xff, 0xff,
0xff, 0xff, 0xff, 0xff,
0xff, 0xff, SCSI_GROUP_NUMBER_MASK, SCSI_CONTROL_MASK},
.update_usage_bits = set_dpofua_usage_bits,
};
static bool tcm_is_ws_enabled(struct target_opcode_descriptor *descr,
struct se_cmd *cmd)
{
struct exec_cmd_ops *ops = cmd->protocol_data;
struct se_device *dev = cmd->se_dev;
return (dev->dev_attrib.emulate_tpws && !!ops->execute_unmap) ||
!!ops->execute_write_same;
}
static struct target_opcode_descriptor tcm_opcode_write_same32 = {
.support = SCSI_SUPPORT_FULL,
.serv_action_valid = 1,
.opcode = VARIABLE_LENGTH_CMD,
.service_action = WRITE_SAME_32,
.cdb_size = 32,
.usage_bits = {VARIABLE_LENGTH_CMD, SCSI_CONTROL_MASK, 0x00, 0x00,
0x00, 0x00, SCSI_GROUP_NUMBER_MASK, 0x18,
0x00, WRITE_SAME_32, 0xe8, 0x00,
0xff, 0xff, 0xff, 0xff,
0xff, 0xff, 0xff, 0xff,
0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00,
0xff, 0xff, 0xff, 0xff},
.enabled = tcm_is_ws_enabled,
.update_usage_bits = set_dpofua_usage_bits32,
};
static bool tcm_is_caw_enabled(struct target_opcode_descriptor *descr,
struct se_cmd *cmd)
{
struct se_device *dev = cmd->se_dev;
return dev->dev_attrib.emulate_caw;
}
static struct target_opcode_descriptor tcm_opcode_compare_write = {
.support = SCSI_SUPPORT_FULL,
.opcode = COMPARE_AND_WRITE,
.cdb_size = 16,
.usage_bits = {COMPARE_AND_WRITE, 0x18, 0xff, 0xff,
0xff, 0xff, 0xff, 0xff,
0xff, 0xff, 0x00, 0x00,
0x00, 0xff, SCSI_GROUP_NUMBER_MASK, SCSI_CONTROL_MASK},
.enabled = tcm_is_caw_enabled,
.update_usage_bits = set_dpofua_usage_bits,
};
static struct target_opcode_descriptor tcm_opcode_read_capacity = {
.support = SCSI_SUPPORT_FULL,
.opcode = READ_CAPACITY,
.cdb_size = 10,
.usage_bits = {READ_CAPACITY, 0x00, 0xff, 0xff,
0xff, 0xff, 0x00, 0x00,
0x01, SCSI_CONTROL_MASK},
};
static struct target_opcode_descriptor tcm_opcode_read_capacity16 = {
.support = SCSI_SUPPORT_FULL,
.serv_action_valid = 1,
.opcode = SERVICE_ACTION_IN_16,
.service_action = SAI_READ_CAPACITY_16,
.cdb_size = 16,
.usage_bits = {SERVICE_ACTION_IN_16, SAI_READ_CAPACITY_16, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0xff, 0xff,
0xff, 0xff, 0x00, SCSI_CONTROL_MASK},
};
static bool tcm_is_rep_ref_enabled(struct target_opcode_descriptor *descr,
struct se_cmd *cmd)
{
struct se_device *dev = cmd->se_dev;
spin_lock(&dev->t10_alua.lba_map_lock);
if (list_empty(&dev->t10_alua.lba_map_list)) {
spin_unlock(&dev->t10_alua.lba_map_lock);
return false;
}
spin_unlock(&dev->t10_alua.lba_map_lock);
return true;
}
static struct target_opcode_descriptor tcm_opcode_read_report_refferals = {
.support = SCSI_SUPPORT_FULL,
.serv_action_valid = 1,
.opcode = SERVICE_ACTION_IN_16,
.service_action = SAI_REPORT_REFERRALS,
.cdb_size = 16,
.usage_bits = {SERVICE_ACTION_IN_16, SAI_REPORT_REFERRALS, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0xff, 0xff,
0xff, 0xff, 0x00, SCSI_CONTROL_MASK},
.enabled = tcm_is_rep_ref_enabled,
};
static struct target_opcode_descriptor tcm_opcode_sync_cache = {
.support = SCSI_SUPPORT_FULL,
.opcode = SYNCHRONIZE_CACHE,
.cdb_size = 10,
.usage_bits = {SYNCHRONIZE_CACHE, 0x02, 0xff, 0xff,
0xff, 0xff, SCSI_GROUP_NUMBER_MASK, 0xff,
0xff, SCSI_CONTROL_MASK},
};
static struct target_opcode_descriptor tcm_opcode_sync_cache16 = {
.support = SCSI_SUPPORT_FULL,
.opcode = SYNCHRONIZE_CACHE_16,
.cdb_size = 16,
.usage_bits = {SYNCHRONIZE_CACHE_16, 0x02, 0xff, 0xff,
0xff, 0xff, 0xff, 0xff,
0xff, 0xff, 0xff, 0xff,
0xff, 0xff, SCSI_GROUP_NUMBER_MASK, SCSI_CONTROL_MASK},
};
static bool tcm_is_unmap_enabled(struct target_opcode_descriptor *descr,
struct se_cmd *cmd)
{
struct exec_cmd_ops *ops = cmd->protocol_data;
struct se_device *dev = cmd->se_dev;
return ops->execute_unmap && dev->dev_attrib.emulate_tpu;
}
static struct target_opcode_descriptor tcm_opcode_unmap = {
.support = SCSI_SUPPORT_FULL,
.opcode = UNMAP,
.cdb_size = 10,
.usage_bits = {UNMAP, 0x00, 0x00, 0x00,
0x00, 0x00, SCSI_GROUP_NUMBER_MASK, 0xff,
0xff, SCSI_CONTROL_MASK},
.enabled = tcm_is_unmap_enabled,
};
static struct target_opcode_descriptor tcm_opcode_write_same = {
.support = SCSI_SUPPORT_FULL,
.opcode = WRITE_SAME,
.cdb_size = 10,
.usage_bits = {WRITE_SAME, 0xe8, 0xff, 0xff,
0xff, 0xff, SCSI_GROUP_NUMBER_MASK, 0xff,
0xff, SCSI_CONTROL_MASK},
.enabled = tcm_is_ws_enabled,
};
static struct target_opcode_descriptor tcm_opcode_write_same16 = {
.support = SCSI_SUPPORT_FULL,
.opcode = WRITE_SAME_16,
.cdb_size = 16,
.usage_bits = {WRITE_SAME_16, 0xe8, 0xff, 0xff,
0xff, 0xff, 0xff, 0xff,
0xff, 0xff, 0xff, 0xff,
0xff, 0xff, SCSI_GROUP_NUMBER_MASK, SCSI_CONTROL_MASK},
.enabled = tcm_is_ws_enabled,
};
static struct target_opcode_descriptor tcm_opcode_verify = {
.support = SCSI_SUPPORT_FULL,
.opcode = VERIFY,
.cdb_size = 10,
.usage_bits = {VERIFY, 0x00, 0xff, 0xff,
0xff, 0xff, SCSI_GROUP_NUMBER_MASK, 0xff,
0xff, SCSI_CONTROL_MASK},
};
static struct target_opcode_descriptor tcm_opcode_verify16 = {
.support = SCSI_SUPPORT_FULL,
.opcode = VERIFY_16,
.cdb_size = 16,
.usage_bits = {VERIFY_16, 0x00, 0xff, 0xff,
0xff, 0xff, 0xff, 0xff,
0xff, 0xff, 0xff, 0xff,
0xff, 0xff, SCSI_GROUP_NUMBER_MASK, SCSI_CONTROL_MASK},
};
static struct target_opcode_descriptor tcm_opcode_start_stop = {
.support = SCSI_SUPPORT_FULL,
.opcode = START_STOP,
.cdb_size = 6,
.usage_bits = {START_STOP, 0x01, 0x00, 0x00,
0x01, SCSI_CONTROL_MASK},
};
static struct target_opcode_descriptor tcm_opcode_mode_select = {
.support = SCSI_SUPPORT_FULL,
.opcode = MODE_SELECT,
.cdb_size = 6,
.usage_bits = {MODE_SELECT, 0x10, 0x00, 0x00,
0xff, SCSI_CONTROL_MASK},
};
static struct target_opcode_descriptor tcm_opcode_mode_select10 = {
.support = SCSI_SUPPORT_FULL,
.opcode = MODE_SELECT_10,
.cdb_size = 10,
.usage_bits = {MODE_SELECT_10, 0x10, 0x00, 0x00,
0x00, 0x00, 0x00, 0xff,
0xff, SCSI_CONTROL_MASK},
};
static struct target_opcode_descriptor tcm_opcode_mode_sense = {
.support = SCSI_SUPPORT_FULL,
.opcode = MODE_SENSE,
.cdb_size = 6,
.usage_bits = {MODE_SENSE, 0x08, 0xff, 0xff,
0xff, SCSI_CONTROL_MASK},
};
static struct target_opcode_descriptor tcm_opcode_mode_sense10 = {
.support = SCSI_SUPPORT_FULL,
.opcode = MODE_SENSE_10,
.cdb_size = 10,
.usage_bits = {MODE_SENSE_10, 0x18, 0xff, 0xff,
0x00, 0x00, 0x00, 0xff,
0xff, SCSI_CONTROL_MASK},
};
static struct target_opcode_descriptor tcm_opcode_pri_read_keys = {
.support = SCSI_SUPPORT_FULL,
.serv_action_valid = 1,
.opcode = PERSISTENT_RESERVE_IN,
.service_action = PRI_READ_KEYS,
.cdb_size = 10,
.usage_bits = {PERSISTENT_RESERVE_IN, PRI_READ_KEYS, 0x00, 0x00,
0x00, 0x00, 0x00, 0xff,
0xff, SCSI_CONTROL_MASK},
};
static struct target_opcode_descriptor tcm_opcode_pri_read_resrv = {
.support = SCSI_SUPPORT_FULL,
.serv_action_valid = 1,
.opcode = PERSISTENT_RESERVE_IN,
.service_action = PRI_READ_RESERVATION,
.cdb_size = 10,
.usage_bits = {PERSISTENT_RESERVE_IN, PRI_READ_RESERVATION, 0x00, 0x00,
0x00, 0x00, 0x00, 0xff,
0xff, SCSI_CONTROL_MASK},
};
static bool tcm_is_pr_enabled(struct target_opcode_descriptor *descr,
struct se_cmd *cmd)
{
struct se_device *dev = cmd->se_dev;
if (!dev->dev_attrib.emulate_pr)
return false;
if (!(dev->transport_flags & TRANSPORT_FLAG_PASSTHROUGH_PGR))
return true;
switch (descr->opcode) {
case RESERVE:
case RESERVE_10:
case RELEASE:
case RELEASE_10:
/*
* The pr_ops which are used by the backend modules don't
* support these commands.
*/
return false;
case PERSISTENT_RESERVE_OUT:
switch (descr->service_action) {
case PRO_REGISTER_AND_MOVE:
case PRO_REPLACE_LOST_RESERVATION:
/*
* The backend modules don't have access to ports and
* I_T nexuses so they can't handle these type of
* requests.
*/
return false;
}
break;
case PERSISTENT_RESERVE_IN:
if (descr->service_action == PRI_READ_FULL_STATUS)
return false;
break;
}
return true;
}
static struct target_opcode_descriptor tcm_opcode_pri_read_caps = {
.support = SCSI_SUPPORT_FULL,
.serv_action_valid = 1,
.opcode = PERSISTENT_RESERVE_IN,
.service_action = PRI_REPORT_CAPABILITIES,
.cdb_size = 10,
.usage_bits = {PERSISTENT_RESERVE_IN, PRI_REPORT_CAPABILITIES, 0x00, 0x00,
0x00, 0x00, 0x00, 0xff,
0xff, SCSI_CONTROL_MASK},
.enabled = tcm_is_pr_enabled,
};
static struct target_opcode_descriptor tcm_opcode_pri_read_full_status = {
.support = SCSI_SUPPORT_FULL,
.serv_action_valid = 1,
.opcode = PERSISTENT_RESERVE_IN,
.service_action = PRI_READ_FULL_STATUS,
.cdb_size = 10,
.usage_bits = {PERSISTENT_RESERVE_IN, PRI_READ_FULL_STATUS, 0x00, 0x00,
0x00, 0x00, 0x00, 0xff,
0xff, SCSI_CONTROL_MASK},
.enabled = tcm_is_pr_enabled,
};
static struct target_opcode_descriptor tcm_opcode_pro_register = {
.support = SCSI_SUPPORT_FULL,
.serv_action_valid = 1,
.opcode = PERSISTENT_RESERVE_OUT,
.service_action = PRO_REGISTER,
.cdb_size = 10,
.usage_bits = {PERSISTENT_RESERVE_OUT, PRO_REGISTER, 0xff, 0x00,
0x00, 0xff, 0xff, 0xff,
0xff, SCSI_CONTROL_MASK},
.enabled = tcm_is_pr_enabled,
};
static struct target_opcode_descriptor tcm_opcode_pro_reserve = {
.support = SCSI_SUPPORT_FULL,
.serv_action_valid = 1,
.opcode = PERSISTENT_RESERVE_OUT,
.service_action = PRO_RESERVE,
.cdb_size = 10,
.usage_bits = {PERSISTENT_RESERVE_OUT, PRO_RESERVE, 0xff, 0x00,
0x00, 0xff, 0xff, 0xff,
0xff, SCSI_CONTROL_MASK},
.enabled = tcm_is_pr_enabled,
};
static struct target_opcode_descriptor tcm_opcode_pro_release = {
.support = SCSI_SUPPORT_FULL,
.serv_action_valid = 1,
.opcode = PERSISTENT_RESERVE_OUT,
.service_action = PRO_RELEASE,
.cdb_size = 10,
.usage_bits = {PERSISTENT_RESERVE_OUT, PRO_RELEASE, 0xff, 0x00,
0x00, 0xff, 0xff, 0xff,
0xff, SCSI_CONTROL_MASK},
.enabled = tcm_is_pr_enabled,
};
static struct target_opcode_descriptor tcm_opcode_pro_clear = {
.support = SCSI_SUPPORT_FULL,
.serv_action_valid = 1,
.opcode = PERSISTENT_RESERVE_OUT,
.service_action = PRO_CLEAR,
.cdb_size = 10,
.usage_bits = {PERSISTENT_RESERVE_OUT, PRO_CLEAR, 0xff, 0x00,
0x00, 0xff, 0xff, 0xff,
0xff, SCSI_CONTROL_MASK},
.enabled = tcm_is_pr_enabled,
};
static struct target_opcode_descriptor tcm_opcode_pro_preempt = {
.support = SCSI_SUPPORT_FULL,
.serv_action_valid = 1,
.opcode = PERSISTENT_RESERVE_OUT,
.service_action = PRO_PREEMPT,
.cdb_size = 10,
.usage_bits = {PERSISTENT_RESERVE_OUT, PRO_PREEMPT, 0xff, 0x00,
0x00, 0xff, 0xff, 0xff,
0xff, SCSI_CONTROL_MASK},
.enabled = tcm_is_pr_enabled,
};
static struct target_opcode_descriptor tcm_opcode_pro_preempt_abort = {
.support = SCSI_SUPPORT_FULL,
.serv_action_valid = 1,
.opcode = PERSISTENT_RESERVE_OUT,
.service_action = PRO_PREEMPT_AND_ABORT,
.cdb_size = 10,
.usage_bits = {PERSISTENT_RESERVE_OUT, PRO_PREEMPT_AND_ABORT, 0xff, 0x00,
0x00, 0xff, 0xff, 0xff,
0xff, SCSI_CONTROL_MASK},
.enabled = tcm_is_pr_enabled,
};
static struct target_opcode_descriptor tcm_opcode_pro_reg_ign_exist = {
.support = SCSI_SUPPORT_FULL,
.serv_action_valid = 1,
.opcode = PERSISTENT_RESERVE_OUT,
.service_action = PRO_REGISTER_AND_IGNORE_EXISTING_KEY,
.cdb_size = 10,
.usage_bits = {
PERSISTENT_RESERVE_OUT, PRO_REGISTER_AND_IGNORE_EXISTING_KEY,
0xff, 0x00,
0x00, 0xff, 0xff, 0xff,
0xff, SCSI_CONTROL_MASK},
.enabled = tcm_is_pr_enabled,
};
static struct target_opcode_descriptor tcm_opcode_pro_register_move = {
.support = SCSI_SUPPORT_FULL,
.serv_action_valid = 1,
.opcode = PERSISTENT_RESERVE_OUT,
.service_action = PRO_REGISTER_AND_MOVE,
.cdb_size = 10,
.usage_bits = {PERSISTENT_RESERVE_OUT, PRO_REGISTER_AND_MOVE, 0xff, 0x00,
0x00, 0xff, 0xff, 0xff,
0xff, SCSI_CONTROL_MASK},
.enabled = tcm_is_pr_enabled,
};
static struct target_opcode_descriptor tcm_opcode_release = {
.support = SCSI_SUPPORT_FULL,
.opcode = RELEASE,
.cdb_size = 6,
.usage_bits = {RELEASE, 0x00, 0x00, 0x00,
0x00, SCSI_CONTROL_MASK},
.enabled = tcm_is_pr_enabled,
};
static struct target_opcode_descriptor tcm_opcode_release10 = {
.support = SCSI_SUPPORT_FULL,
.opcode = RELEASE_10,
.cdb_size = 10,
.usage_bits = {RELEASE_10, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0xff,
0xff, SCSI_CONTROL_MASK},
.enabled = tcm_is_pr_enabled,
};
static struct target_opcode_descriptor tcm_opcode_reserve = {
.support = SCSI_SUPPORT_FULL,
.opcode = RESERVE,
.cdb_size = 6,
.usage_bits = {RESERVE, 0x00, 0x00, 0x00,
0x00, SCSI_CONTROL_MASK},
.enabled = tcm_is_pr_enabled,
};
static struct target_opcode_descriptor tcm_opcode_reserve10 = {
.support = SCSI_SUPPORT_FULL,
.opcode = RESERVE_10,
.cdb_size = 10,
.usage_bits = {RESERVE_10, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0xff,
0xff, SCSI_CONTROL_MASK},
.enabled = tcm_is_pr_enabled,
};
static struct target_opcode_descriptor tcm_opcode_request_sense = {
.support = SCSI_SUPPORT_FULL,
.opcode = REQUEST_SENSE,
.cdb_size = 6,
.usage_bits = {REQUEST_SENSE, 0x00, 0x00, 0x00,
0xff, SCSI_CONTROL_MASK},
};
static struct target_opcode_descriptor tcm_opcode_inquiry = {
.support = SCSI_SUPPORT_FULL,
.opcode = INQUIRY,
.cdb_size = 6,
.usage_bits = {INQUIRY, 0x01, 0xff, 0xff,
0xff, SCSI_CONTROL_MASK},
};
static bool tcm_is_3pc_enabled(struct target_opcode_descriptor *descr,
struct se_cmd *cmd)
{
struct se_device *dev = cmd->se_dev;
return dev->dev_attrib.emulate_3pc;
}
static struct target_opcode_descriptor tcm_opcode_extended_copy_lid1 = {
.support = SCSI_SUPPORT_FULL,
.serv_action_valid = 1,
.opcode = EXTENDED_COPY,
.cdb_size = 16,
.usage_bits = {EXTENDED_COPY, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0xff, 0xff,
0xff, 0xff, 0x00, SCSI_CONTROL_MASK},
.enabled = tcm_is_3pc_enabled,
};
static struct target_opcode_descriptor tcm_opcode_rcv_copy_res_op_params = {
.support = SCSI_SUPPORT_FULL,
.serv_action_valid = 1,
.opcode = RECEIVE_COPY_RESULTS,
.service_action = RCR_SA_OPERATING_PARAMETERS,
.cdb_size = 16,
.usage_bits = {RECEIVE_COPY_RESULTS, RCR_SA_OPERATING_PARAMETERS,
0x00, 0x00,
0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0xff, 0xff,
0xff, 0xff, 0x00, SCSI_CONTROL_MASK},
.enabled = tcm_is_3pc_enabled,
};
static struct target_opcode_descriptor tcm_opcode_report_luns = {
.support = SCSI_SUPPORT_FULL,
.opcode = REPORT_LUNS,
.cdb_size = 12,
.usage_bits = {REPORT_LUNS, 0x00, 0xff, 0x00,
0x00, 0x00, 0xff, 0xff,
0xff, 0xff, 0x00, SCSI_CONTROL_MASK},
};
static struct target_opcode_descriptor tcm_opcode_test_unit_ready = {
.support = SCSI_SUPPORT_FULL,
.opcode = TEST_UNIT_READY,
.cdb_size = 6,
.usage_bits = {TEST_UNIT_READY, 0x00, 0x00, 0x00,
0x00, SCSI_CONTROL_MASK},
};
static struct target_opcode_descriptor tcm_opcode_report_target_pgs = {
.support = SCSI_SUPPORT_FULL,
.serv_action_valid = 1,
.opcode = MAINTENANCE_IN,
.service_action = MI_REPORT_TARGET_PGS,
.cdb_size = 12,
.usage_bits = {MAINTENANCE_IN, 0xE0 | MI_REPORT_TARGET_PGS, 0x00, 0x00,
0x00, 0x00, 0xff, 0xff,
0xff, 0xff, 0x00, SCSI_CONTROL_MASK},
};
static bool spc_rsoc_enabled(struct target_opcode_descriptor *descr,
struct se_cmd *cmd)
{
struct se_device *dev = cmd->se_dev;
return dev->dev_attrib.emulate_rsoc;
}
static struct target_opcode_descriptor tcm_opcode_report_supp_opcodes = {
.support = SCSI_SUPPORT_FULL,
.serv_action_valid = 1,
.opcode = MAINTENANCE_IN,
.service_action = MI_REPORT_SUPPORTED_OPERATION_CODES,
.cdb_size = 12,
.usage_bits = {MAINTENANCE_IN, MI_REPORT_SUPPORTED_OPERATION_CODES,
0x87, 0xff,
0xff, 0xff, 0xff, 0xff,
0xff, 0xff, 0x00, SCSI_CONTROL_MASK},
.enabled = spc_rsoc_enabled,
};
static bool tcm_is_set_tpg_enabled(struct target_opcode_descriptor *descr,
struct se_cmd *cmd)
{
struct t10_alua_tg_pt_gp *l_tg_pt_gp;
struct se_lun *l_lun = cmd->se_lun;
rcu_read_lock();
l_tg_pt_gp = rcu_dereference(l_lun->lun_tg_pt_gp);
if (!l_tg_pt_gp) {
rcu_read_unlock();
return false;
}
if (!(l_tg_pt_gp->tg_pt_gp_alua_access_type & TPGS_EXPLICIT_ALUA)) {
rcu_read_unlock();
return false;
}
rcu_read_unlock();
return true;
}
static struct target_opcode_descriptor tcm_opcode_set_tpg = {
.support = SCSI_SUPPORT_FULL,
.serv_action_valid = 1,
.opcode = MAINTENANCE_OUT,
.service_action = MO_SET_TARGET_PGS,
.cdb_size = 12,
.usage_bits = {MAINTENANCE_OUT, MO_SET_TARGET_PGS, 0x00, 0x00,
0x00, 0x00, 0xff, 0xff,
0xff, 0xff, 0x00, SCSI_CONTROL_MASK},
.enabled = tcm_is_set_tpg_enabled,
};
static struct target_opcode_descriptor *tcm_supported_opcodes[] = {
&tcm_opcode_read6,
&tcm_opcode_read10,
&tcm_opcode_read12,
&tcm_opcode_read16,
&tcm_opcode_write6,
&tcm_opcode_write10,
&tcm_opcode_write_verify10,
&tcm_opcode_write12,
&tcm_opcode_write16,
&tcm_opcode_write_verify16,
&tcm_opcode_write_same32,
&tcm_opcode_compare_write,
&tcm_opcode_read_capacity,
&tcm_opcode_read_capacity16,
&tcm_opcode_read_report_refferals,
&tcm_opcode_sync_cache,
&tcm_opcode_sync_cache16,
&tcm_opcode_unmap,
&tcm_opcode_write_same,
&tcm_opcode_write_same16,
&tcm_opcode_verify,
&tcm_opcode_verify16,
&tcm_opcode_start_stop,
&tcm_opcode_mode_select,
&tcm_opcode_mode_select10,
&tcm_opcode_mode_sense,
&tcm_opcode_mode_sense10,
&tcm_opcode_pri_read_keys,
&tcm_opcode_pri_read_resrv,
&tcm_opcode_pri_read_caps,
&tcm_opcode_pri_read_full_status,
&tcm_opcode_pro_register,
&tcm_opcode_pro_reserve,
&tcm_opcode_pro_release,
&tcm_opcode_pro_clear,
&tcm_opcode_pro_preempt,
&tcm_opcode_pro_preempt_abort,
&tcm_opcode_pro_reg_ign_exist,
&tcm_opcode_pro_register_move,
&tcm_opcode_release,
&tcm_opcode_release10,
&tcm_opcode_reserve,
&tcm_opcode_reserve10,
&tcm_opcode_request_sense,
&tcm_opcode_inquiry,
&tcm_opcode_extended_copy_lid1,
&tcm_opcode_rcv_copy_res_op_params,
&tcm_opcode_report_luns,
&tcm_opcode_test_unit_ready,
&tcm_opcode_report_target_pgs,
&tcm_opcode_report_supp_opcodes,
&tcm_opcode_set_tpg,
};
static int
spc_rsoc_encode_command_timeouts_descriptor(unsigned char *buf, u8 ctdp,
struct target_opcode_descriptor *descr)
{
if (!ctdp)
return 0;
put_unaligned_be16(0xa, buf);
buf[3] = descr->specific_timeout;
put_unaligned_be32(descr->nominal_timeout, &buf[4]);
put_unaligned_be32(descr->recommended_timeout, &buf[8]);
return 12;
}
static int
spc_rsoc_encode_command_descriptor(unsigned char *buf, u8 ctdp,
struct target_opcode_descriptor *descr)
{
int td_size = 0;
buf[0] = descr->opcode;
put_unaligned_be16(descr->service_action, &buf[2]);
buf[5] = (ctdp << 1) | descr->serv_action_valid;
put_unaligned_be16(descr->cdb_size, &buf[6]);
td_size = spc_rsoc_encode_command_timeouts_descriptor(&buf[8], ctdp,
descr);
return 8 + td_size;
}
static int
spc_rsoc_encode_one_command_descriptor(unsigned char *buf, u8 ctdp,
struct target_opcode_descriptor *descr,
struct se_device *dev)
{
int td_size = 0;
if (!descr) {
buf[1] = (ctdp << 7) | SCSI_SUPPORT_NOT_SUPPORTED;
return 2;
}
buf[1] = (ctdp << 7) | SCSI_SUPPORT_FULL;
put_unaligned_be16(descr->cdb_size, &buf[2]);
memcpy(&buf[4], descr->usage_bits, descr->cdb_size);
if (descr->update_usage_bits)
descr->update_usage_bits(&buf[4], dev);
td_size = spc_rsoc_encode_command_timeouts_descriptor(
&buf[4 + descr->cdb_size], ctdp, descr);
return 4 + descr->cdb_size + td_size;
}
static sense_reason_t
spc_rsoc_get_descr(struct se_cmd *cmd, struct target_opcode_descriptor **opcode)
{
struct target_opcode_descriptor *descr;
struct se_session *sess = cmd->se_sess;
unsigned char *cdb = cmd->t_task_cdb;
u8 opts = cdb[2] & 0x3;
u8 requested_opcode;
u16 requested_sa;
int i;
requested_opcode = cdb[3];
requested_sa = ((u16)cdb[4]) << 8 | cdb[5];
*opcode = NULL;
if (opts > 3) {
pr_debug("TARGET_CORE[%s]: Invalid REPORT SUPPORTED OPERATION CODES"
" with unsupported REPORTING OPTIONS %#x for 0x%08llx from %s\n",
cmd->se_tfo->fabric_name, opts,
cmd->se_lun->unpacked_lun,
sess->se_node_acl->initiatorname);
return TCM_INVALID_CDB_FIELD;
}
for (i = 0; i < ARRAY_SIZE(tcm_supported_opcodes); i++) {
descr = tcm_supported_opcodes[i];
if (descr->opcode != requested_opcode)
continue;
switch (opts) {
case 0x1:
/*
* If the REQUESTED OPERATION CODE field specifies an
* operation code for which the device server implements
* service actions, then the device server shall
* terminate the command with CHECK CONDITION status,
* with the sense key set to ILLEGAL REQUEST, and the
* additional sense code set to INVALID FIELD IN CDB
*/
if (descr->serv_action_valid)
return TCM_INVALID_CDB_FIELD;
if (!descr->enabled || descr->enabled(descr, cmd))
*opcode = descr;
break;
case 0x2:
/*
* If the REQUESTED OPERATION CODE field specifies an
* operation code for which the device server does not
* implement service actions, then the device server
* shall terminate the command with CHECK CONDITION
* status, with the sense key set to ILLEGAL REQUEST,
* and the additional sense code set to INVALID FIELD IN CDB.
*/
if (descr->serv_action_valid &&
descr->service_action == requested_sa) {
if (!descr->enabled || descr->enabled(descr,
cmd))
*opcode = descr;
} else if (!descr->serv_action_valid)
return TCM_INVALID_CDB_FIELD;
break;
case 0x3:
/*
* The command support data for the operation code and
* service action a specified in the REQUESTED OPERATION
* CODE field and REQUESTED SERVICE ACTION field shall
* be returned in the one_command parameter data format.
*/
if (descr->service_action == requested_sa)
if (!descr->enabled || descr->enabled(descr,
cmd))
*opcode = descr;
break;
}
}
return 0;
}
static sense_reason_t
spc_emulate_report_supp_op_codes(struct se_cmd *cmd)
{
int descr_num = ARRAY_SIZE(tcm_supported_opcodes);
struct target_opcode_descriptor *descr = NULL;
unsigned char *cdb = cmd->t_task_cdb;
u8 rctd = (cdb[2] >> 7) & 0x1;
unsigned char *buf = NULL;
int response_length = 0;
u8 opts = cdb[2] & 0x3;
unsigned char *rbuf;
sense_reason_t ret = 0;
int i;
if (!cmd->se_dev->dev_attrib.emulate_rsoc)
return TCM_UNSUPPORTED_SCSI_OPCODE;
rbuf = transport_kmap_data_sg(cmd);
if (cmd->data_length && !rbuf) {
ret = TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE;
goto out;
}
if (opts == 0)
response_length = 4 + (8 + rctd * 12) * descr_num;
else {
ret = spc_rsoc_get_descr(cmd, &descr);
if (ret)
goto out;
if (descr)
response_length = 4 + descr->cdb_size + rctd * 12;
else
response_length = 2;
}
buf = kzalloc(response_length, GFP_KERNEL);
if (!buf) {
ret = TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE;
goto out;
}
response_length = 0;
if (opts == 0) {
response_length += 4;
for (i = 0; i < ARRAY_SIZE(tcm_supported_opcodes); i++) {
descr = tcm_supported_opcodes[i];
if (descr->enabled && !descr->enabled(descr, cmd))
continue;
response_length += spc_rsoc_encode_command_descriptor(
&buf[response_length], rctd, descr);
}
put_unaligned_be32(response_length - 3, buf);
} else {
response_length = spc_rsoc_encode_one_command_descriptor(
&buf[response_length], rctd, descr,
cmd->se_dev);
}
memcpy(rbuf, buf, min_t(u32, response_length, cmd->data_length));
out:
kfree(buf);
transport_kunmap_data_sg(cmd);
if (!ret)
target_complete_cmd_with_length(cmd, SAM_STAT_GOOD, response_length);
return ret;
}
sense_reason_t
spc_parse_cdb(struct se_cmd *cmd, unsigned int *size)
{
struct se_device *dev = cmd->se_dev;
unsigned char *cdb = cmd->t_task_cdb;
switch (cdb[0]) {
case RESERVE:
case RESERVE_10:
case RELEASE:
case RELEASE_10:
if (!dev->dev_attrib.emulate_pr)
return TCM_UNSUPPORTED_SCSI_OPCODE;
if (dev->transport_flags & TRANSPORT_FLAG_PASSTHROUGH_PGR)
return TCM_UNSUPPORTED_SCSI_OPCODE;
break;
case PERSISTENT_RESERVE_IN:
case PERSISTENT_RESERVE_OUT:
if (!dev->dev_attrib.emulate_pr)
return TCM_UNSUPPORTED_SCSI_OPCODE;
break;
}
switch (cdb[0]) {
case MODE_SELECT:
*size = cdb[4];
cmd->execute_cmd = spc_emulate_modeselect;
break;
case MODE_SELECT_10:
*size = 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;
}
if ((cdb[1] & 0x1f) ==
MI_REPORT_SUPPORTED_OPERATION_CODES)
cmd->execute_cmd =
spc_emulate_report_supp_op_codes;
*size = get_unaligned_be32(&cdb[6]);
} else {
/*
* 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);
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