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@@ -1,1130 +0,0 @@
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-/*
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- * CDB emulation for non-READ/WRITE commands.
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- *
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- * Copyright (c) 2002, 2003, 2004, 2005 PyX Technologies, Inc.
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- * Copyright (c) 2005, 2006, 2007 SBE, Inc.
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- * Copyright (c) 2007-2010 Rising Tide Systems
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- * Copyright (c) 2008-2010 Linux-iSCSI.org
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- *
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- * Nicholas A. Bellinger <nab@kernel.org>
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- *
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- * This program is free software; you can redistribute it and/or modify
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- * it under the terms of the GNU General Public License as published by
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- * the Free Software Foundation; either version 2 of the License, or
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- * (at your option) any later version.
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- *
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- * This program is distributed in the hope that it will be useful,
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- * but WITHOUT ANY WARRANTY; without even the implied warranty of
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- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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- * GNU General Public License for more details.
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- *
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- * You should have received a copy of the GNU General Public License
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- * along with this program; if not, write to the Free Software
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- * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
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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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-#include <scsi/scsi.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_ua.h"
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-
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-static void
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-target_fill_alua_data(struct se_port *port, unsigned char *buf)
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-{
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- struct t10_alua_tg_pt_gp *tg_pt_gp;
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- struct t10_alua_tg_pt_gp_member *tg_pt_gp_mem;
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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 explict and/or implict 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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- if (!port)
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- return;
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- tg_pt_gp_mem = port->sep_alua_tg_pt_gp_mem;
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- if (!tg_pt_gp_mem)
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- return;
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-
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- spin_lock(&tg_pt_gp_mem->tg_pt_gp_mem_lock);
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- tg_pt_gp = tg_pt_gp_mem->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(&tg_pt_gp_mem->tg_pt_gp_mem_lock);
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-}
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-
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-static int
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-target_emulate_inquiry_std(struct se_cmd *cmd, 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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-
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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] = dev->transport->get_device_rev(dev);
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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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- if (dev->se_sub_dev->t10_alua.alua_type == SPC3_ALUA_EMULATED)
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- target_fill_alua_data(lun->lun_sep, buf);
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-
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- buf[7] = 0x2; /* CmdQue=1 */
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-
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- snprintf(&buf[8], 8, "LIO-ORG");
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- snprintf(&buf[16], 16, "%s", dev->se_sub_dev->t10_wwn.model);
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- snprintf(&buf[32], 4, "%s", dev->se_sub_dev->t10_wwn.revision);
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- buf[4] = 31; /* Set additional length to 31 */
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-
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- return 0;
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-}
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-
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-/* unit serial number */
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-static int
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-target_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 = 0;
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-
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- if (dev->se_sub_dev->su_dev_flags &
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- SDF_EMULATED_VPD_UNIT_SERIAL) {
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- u32 unit_serial_len;
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-
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- unit_serial_len = strlen(dev->se_sub_dev->t10_wwn.unit_serial);
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- unit_serial_len++; /* For NULL Terminator */
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-
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- len += sprintf(&buf[4], "%s",
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- dev->se_sub_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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-static void
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-target_parse_naa_6h_vendor_specific(struct se_device *dev, unsigned char *buf)
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-{
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- unsigned char *p = &dev->se_sub_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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-static int
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-target_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_port *port = NULL;
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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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- struct t10_alua_tg_pt_gp_member *tg_pt_gp_mem;
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- unsigned char *prod = &dev->se_sub_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->se_sub_dev->su_dev_flags & SDF_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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- target_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->se_sub_dev->su_dev_flags &
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- SDF_EMULATED_VPD_UNIT_SERIAL) {
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- unit_serial_len =
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- strlen(&dev->se_sub_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->se_sub_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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- memcpy(&buf[off+4], "LIO-ORG", 8);
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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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- * struct se_port is only set for INQUIRY VPD=1 through $FABRIC_MOD
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- */
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- port = lun->lun_sep;
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- if (port) {
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- struct t10_alua_lu_gp *lu_gp;
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- u32 padding, scsi_name_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 = port->sep_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] =
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- (tpg->se_tpg_tfo->get_fabric_proto_ident(tpg) << 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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- buf[off++] = ((port->sep_rtpi >> 8) & 0xff);
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- buf[off++] = (port->sep_rtpi & 0xff);
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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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- if (dev->se_sub_dev->t10_alua.alua_type !=
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- SPC3_ALUA_EMULATED)
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- goto check_scsi_name;
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-
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- tg_pt_gp_mem = port->sep_alua_tg_pt_gp_mem;
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- if (!tg_pt_gp_mem)
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- goto check_lu_gp;
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-
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- spin_lock(&tg_pt_gp_mem->tg_pt_gp_mem_lock);
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- tg_pt_gp = tg_pt_gp_mem->tg_pt_gp;
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- if (!tg_pt_gp) {
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- spin_unlock(&tg_pt_gp_mem->tg_pt_gp_mem_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(&tg_pt_gp_mem->tg_pt_gp_mem_lock);
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-
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- buf[off] =
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- (tpg->se_tpg_tfo->get_fabric_proto_ident(tpg) << 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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- buf[off++] = ((tg_pt_gp_id >> 8) & 0xff);
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- buf[off++] = (tg_pt_gp_id & 0xff);
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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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- buf[off++] = ((lu_gp_id >> 8) & 0xff);
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- buf[off++] = (lu_gp_id & 0xff);
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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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- scsi_name_len = strlen(tpg->se_tpg_tfo->tpg_get_wwn(tpg));
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- /* UTF-8 ",t,0x<16-bit TPGT>" + NULL Terminator */
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- scsi_name_len += 10;
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- /* Check for 4-byte padding */
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- padding = ((-scsi_name_len) & 3);
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- if (padding != 0)
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- scsi_name_len += padding;
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- /* Header size + Designation descriptor */
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- scsi_name_len += 4;
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-
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- buf[off] =
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- (tpg->se_tpg_tfo->get_fabric_proto_ident(tpg) << 4);
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- buf[off++] |= 0x3; /* CODE SET == UTF-8 */
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|
|
- buf[off] = 0x80; /* Set PIV=1 */
|
|
|
- /* Set ASSOCIATION == target port: 01b */
|
|
|
- buf[off] |= 0x10;
|
|
|
- /* DESIGNATOR TYPE == SCSI name string */
|
|
|
- buf[off++] |= 0x8;
|
|
|
- off += 2; /* Skip over Reserved and length */
|
|
|
- /*
|
|
|
- * SCSI name string identifer containing, $FABRIC_MOD
|
|
|
- * dependent information. For LIO-Target and iSCSI
|
|
|
- * Target Port, this means "<iSCSI name>,t,0x<TPGT> in
|
|
|
- * UTF-8 encoding.
|
|
|
- */
|
|
|
- tpgt = tpg->se_tpg_tfo->tpg_get_tag(tpg);
|
|
|
- scsi_name_len = sprintf(&buf[off], "%s,t,0x%04x",
|
|
|
- tpg->se_tpg_tfo->tpg_get_wwn(tpg), tpgt);
|
|
|
- scsi_name_len += 1 /* Include NULL terminator */;
|
|
|
- /*
|
|
|
- * The null-terminated, null-padded (see 4.4.2) SCSI
|
|
|
- * NAME STRING field contains a UTF-8 format string.
|
|
|
- * The number of bytes in the SCSI NAME STRING field
|
|
|
- * (i.e., the value in the DESIGNATOR LENGTH field)
|
|
|
- * shall be no larger than 256 and shall be a multiple
|
|
|
- * of four.
|
|
|
- */
|
|
|
- if (padding)
|
|
|
- scsi_name_len += padding;
|
|
|
-
|
|
|
- buf[off-1] = scsi_name_len;
|
|
|
- off += scsi_name_len;
|
|
|
- /* Header size + Designation descriptor */
|
|
|
- len += (scsi_name_len + 4);
|
|
|
- }
|
|
|
- buf[2] = ((len >> 8) & 0xff);
|
|
|
- buf[3] = (len & 0xff); /* Page Length for VPD 0x83 */
|
|
|
- return 0;
|
|
|
-}
|
|
|
-
|
|
|
-/* Extended INQUIRY Data VPD Page */
|
|
|
-static int
|
|
|
-target_emulate_evpd_86(struct se_cmd *cmd, unsigned char *buf)
|
|
|
-{
|
|
|
- buf[3] = 0x3c;
|
|
|
- /* Set HEADSUP, ORDSUP, SIMPSUP */
|
|
|
- buf[5] = 0x07;
|
|
|
-
|
|
|
- /* If WriteCache emulation is enabled, set V_SUP */
|
|
|
- if (cmd->se_dev->se_sub_dev->se_dev_attrib.emulate_write_cache > 0)
|
|
|
- buf[6] = 0x01;
|
|
|
- return 0;
|
|
|
-}
|
|
|
-
|
|
|
-/* Block Limits VPD page */
|
|
|
-static int
|
|
|
-target_emulate_evpd_b0(struct se_cmd *cmd, unsigned char *buf)
|
|
|
-{
|
|
|
- struct se_device *dev = cmd->se_dev;
|
|
|
- u32 max_sectors;
|
|
|
- int have_tp = 0;
|
|
|
-
|
|
|
- /*
|
|
|
- * Following sbc3r22 section 6.5.3 Block Limits VPD page, when
|
|
|
- * emulate_tpu=1 or emulate_tpws=1 we will be expect a
|
|
|
- * different page length for Thin Provisioning.
|
|
|
- */
|
|
|
- if (dev->se_sub_dev->se_dev_attrib.emulate_tpu || dev->se_sub_dev->se_dev_attrib.emulate_tpws)
|
|
|
- have_tp = 1;
|
|
|
-
|
|
|
- buf[0] = dev->transport->get_device_type(dev);
|
|
|
- buf[3] = have_tp ? 0x3c : 0x10;
|
|
|
-
|
|
|
- /* Set WSNZ to 1 */
|
|
|
- buf[4] = 0x01;
|
|
|
-
|
|
|
- /*
|
|
|
- * Set OPTIMAL TRANSFER LENGTH GRANULARITY
|
|
|
- */
|
|
|
- put_unaligned_be16(1, &buf[6]);
|
|
|
-
|
|
|
- /*
|
|
|
- * Set MAXIMUM TRANSFER LENGTH
|
|
|
- */
|
|
|
- max_sectors = min(dev->se_sub_dev->se_dev_attrib.fabric_max_sectors,
|
|
|
- dev->se_sub_dev->se_dev_attrib.hw_max_sectors);
|
|
|
- put_unaligned_be32(max_sectors, &buf[8]);
|
|
|
-
|
|
|
- /*
|
|
|
- * Set OPTIMAL TRANSFER LENGTH
|
|
|
- */
|
|
|
- put_unaligned_be32(dev->se_sub_dev->se_dev_attrib.optimal_sectors, &buf[12]);
|
|
|
-
|
|
|
- /*
|
|
|
- * Exit now if we don't support TP.
|
|
|
- */
|
|
|
- if (!have_tp)
|
|
|
- return 0;
|
|
|
-
|
|
|
- /*
|
|
|
- * Set MAXIMUM UNMAP LBA COUNT
|
|
|
- */
|
|
|
- put_unaligned_be32(dev->se_sub_dev->se_dev_attrib.max_unmap_lba_count, &buf[20]);
|
|
|
-
|
|
|
- /*
|
|
|
- * Set MAXIMUM UNMAP BLOCK DESCRIPTOR COUNT
|
|
|
- */
|
|
|
- put_unaligned_be32(dev->se_sub_dev->se_dev_attrib.max_unmap_block_desc_count,
|
|
|
- &buf[24]);
|
|
|
-
|
|
|
- /*
|
|
|
- * Set OPTIMAL UNMAP GRANULARITY
|
|
|
- */
|
|
|
- put_unaligned_be32(dev->se_sub_dev->se_dev_attrib.unmap_granularity, &buf[28]);
|
|
|
-
|
|
|
- /*
|
|
|
- * UNMAP GRANULARITY ALIGNMENT
|
|
|
- */
|
|
|
- put_unaligned_be32(dev->se_sub_dev->se_dev_attrib.unmap_granularity_alignment,
|
|
|
- &buf[32]);
|
|
|
- if (dev->se_sub_dev->se_dev_attrib.unmap_granularity_alignment != 0)
|
|
|
- buf[32] |= 0x80; /* Set the UGAVALID bit */
|
|
|
-
|
|
|
- return 0;
|
|
|
-}
|
|
|
-
|
|
|
-/* Block Device Characteristics VPD page */
|
|
|
-static int
|
|
|
-target_emulate_evpd_b1(struct se_cmd *cmd, unsigned char *buf)
|
|
|
-{
|
|
|
- struct se_device *dev = cmd->se_dev;
|
|
|
-
|
|
|
- buf[0] = dev->transport->get_device_type(dev);
|
|
|
- buf[3] = 0x3c;
|
|
|
- buf[5] = dev->se_sub_dev->se_dev_attrib.is_nonrot ? 1 : 0;
|
|
|
-
|
|
|
- return 0;
|
|
|
-}
|
|
|
-
|
|
|
-/* Thin Provisioning VPD */
|
|
|
-static int
|
|
|
-target_emulate_evpd_b2(struct se_cmd *cmd, unsigned char *buf)
|
|
|
-{
|
|
|
- struct se_device *dev = cmd->se_dev;
|
|
|
-
|
|
|
- /*
|
|
|
- * From sbc3r22 section 6.5.4 Thin Provisioning VPD page:
|
|
|
- *
|
|
|
- * The PAGE LENGTH field is defined in SPC-4. If the DP bit is set to
|
|
|
- * zero, then the page length shall be set to 0004h. If the DP bit
|
|
|
- * is set to one, then the page length shall be set to the value
|
|
|
- * defined in table 162.
|
|
|
- */
|
|
|
- buf[0] = dev->transport->get_device_type(dev);
|
|
|
-
|
|
|
- /*
|
|
|
- * Set Hardcoded length mentioned above for DP=0
|
|
|
- */
|
|
|
- put_unaligned_be16(0x0004, &buf[2]);
|
|
|
-
|
|
|
- /*
|
|
|
- * The THRESHOLD EXPONENT field indicates the threshold set size in
|
|
|
- * LBAs as a power of 2 (i.e., the threshold set size is equal to
|
|
|
- * 2(threshold exponent)).
|
|
|
- *
|
|
|
- * Note that this is currently set to 0x00 as mkp says it will be
|
|
|
- * changing again. We can enable this once it has settled in T10
|
|
|
- * and is actually used by Linux/SCSI ML code.
|
|
|
- */
|
|
|
- buf[4] = 0x00;
|
|
|
-
|
|
|
- /*
|
|
|
- * A TPU bit set to one indicates that the device server supports
|
|
|
- * the UNMAP command (see 5.25). A TPU bit set to zero indicates
|
|
|
- * that the device server does not support the UNMAP command.
|
|
|
- */
|
|
|
- if (dev->se_sub_dev->se_dev_attrib.emulate_tpu != 0)
|
|
|
- buf[5] = 0x80;
|
|
|
-
|
|
|
- /*
|
|
|
- * A TPWS bit set to one indicates that the device server supports
|
|
|
- * the use of the WRITE SAME (16) command (see 5.42) to unmap LBAs.
|
|
|
- * A TPWS bit set to zero indicates that the device server does not
|
|
|
- * support the use of the WRITE SAME (16) command to unmap LBAs.
|
|
|
- */
|
|
|
- if (dev->se_sub_dev->se_dev_attrib.emulate_tpws != 0)
|
|
|
- buf[5] |= 0x40;
|
|
|
-
|
|
|
- return 0;
|
|
|
-}
|
|
|
-
|
|
|
-static int
|
|
|
-target_emulate_evpd_00(struct se_cmd *cmd, unsigned char *buf);
|
|
|
-
|
|
|
-static struct {
|
|
|
- uint8_t page;
|
|
|
- int (*emulate)(struct se_cmd *, unsigned char *);
|
|
|
-} evpd_handlers[] = {
|
|
|
- { .page = 0x00, .emulate = target_emulate_evpd_00 },
|
|
|
- { .page = 0x80, .emulate = target_emulate_evpd_80 },
|
|
|
- { .page = 0x83, .emulate = target_emulate_evpd_83 },
|
|
|
- { .page = 0x86, .emulate = target_emulate_evpd_86 },
|
|
|
- { .page = 0xb0, .emulate = target_emulate_evpd_b0 },
|
|
|
- { .page = 0xb1, .emulate = target_emulate_evpd_b1 },
|
|
|
- { .page = 0xb2, .emulate = target_emulate_evpd_b2 },
|
|
|
-};
|
|
|
-
|
|
|
-/* supported vital product data pages */
|
|
|
-static int
|
|
|
-target_emulate_evpd_00(struct se_cmd *cmd, unsigned char *buf)
|
|
|
-{
|
|
|
- int p;
|
|
|
-
|
|
|
- /*
|
|
|
- * Only report the INQUIRY EVPD=1 pages after a valid NAA
|
|
|
- * Registered Extended LUN WWN has been set via ConfigFS
|
|
|
- * during device creation/restart.
|
|
|
- */
|
|
|
- if (cmd->se_dev->se_sub_dev->su_dev_flags &
|
|
|
- SDF_EMULATED_VPD_UNIT_SERIAL) {
|
|
|
- buf[3] = ARRAY_SIZE(evpd_handlers);
|
|
|
- for (p = 0; p < ARRAY_SIZE(evpd_handlers); ++p)
|
|
|
- buf[p + 4] = evpd_handlers[p].page;
|
|
|
- }
|
|
|
-
|
|
|
- return 0;
|
|
|
-}
|
|
|
-
|
|
|
-int target_emulate_inquiry(struct se_cmd *cmd)
|
|
|
-{
|
|
|
- struct se_device *dev = cmd->se_dev;
|
|
|
- struct se_portal_group *tpg = cmd->se_lun->lun_sep->sep_tpg;
|
|
|
- unsigned char *buf, *map_buf;
|
|
|
- unsigned char *cdb = cmd->t_task_cdb;
|
|
|
- int p, ret;
|
|
|
-
|
|
|
- map_buf = transport_kmap_data_sg(cmd);
|
|
|
- /*
|
|
|
- * If SCF_PASSTHROUGH_SG_TO_MEM_NOALLOC is not set, then we
|
|
|
- * know we actually allocated a full page. Otherwise, if the
|
|
|
- * data buffer is too small, allocate a temporary buffer so we
|
|
|
- * don't have to worry about overruns in all our INQUIRY
|
|
|
- * emulation handling.
|
|
|
- */
|
|
|
- if (cmd->data_length < SE_INQUIRY_BUF &&
|
|
|
- (cmd->se_cmd_flags & SCF_PASSTHROUGH_SG_TO_MEM_NOALLOC)) {
|
|
|
- buf = kzalloc(SE_INQUIRY_BUF, GFP_KERNEL);
|
|
|
- if (!buf) {
|
|
|
- transport_kunmap_data_sg(cmd);
|
|
|
- cmd->scsi_sense_reason = TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE;
|
|
|
- return -ENOMEM;
|
|
|
- }
|
|
|
- } else {
|
|
|
- buf = map_buf;
|
|
|
- }
|
|
|
-
|
|
|
- if (dev == tpg->tpg_virt_lun0.lun_se_dev)
|
|
|
- buf[0] = 0x3f; /* Not connected */
|
|
|
- else
|
|
|
- buf[0] = dev->transport->get_device_type(dev);
|
|
|
-
|
|
|
- if (!(cdb[1] & 0x1)) {
|
|
|
- if (cdb[2]) {
|
|
|
- pr_err("INQUIRY with EVPD==0 but PAGE CODE=%02x\n",
|
|
|
- cdb[2]);
|
|
|
- cmd->scsi_sense_reason = TCM_INVALID_CDB_FIELD;
|
|
|
- ret = -EINVAL;
|
|
|
- goto out;
|
|
|
- }
|
|
|
-
|
|
|
- ret = target_emulate_inquiry_std(cmd, buf);
|
|
|
- goto out;
|
|
|
- }
|
|
|
-
|
|
|
- for (p = 0; p < ARRAY_SIZE(evpd_handlers); ++p) {
|
|
|
- if (cdb[2] == evpd_handlers[p].page) {
|
|
|
- buf[1] = cdb[2];
|
|
|
- ret = evpd_handlers[p].emulate(cmd, buf);
|
|
|
- goto out;
|
|
|
- }
|
|
|
- }
|
|
|
-
|
|
|
- pr_err("Unknown VPD Code: 0x%02x\n", cdb[2]);
|
|
|
- cmd->scsi_sense_reason = TCM_INVALID_CDB_FIELD;
|
|
|
- ret = -EINVAL;
|
|
|
-
|
|
|
-out:
|
|
|
- if (buf != map_buf) {
|
|
|
- memcpy(map_buf, buf, cmd->data_length);
|
|
|
- kfree(buf);
|
|
|
- }
|
|
|
- transport_kunmap_data_sg(cmd);
|
|
|
-
|
|
|
- if (!ret)
|
|
|
- target_complete_cmd(cmd, GOOD);
|
|
|
- return ret;
|
|
|
-}
|
|
|
-
|
|
|
-int target_emulate_readcapacity(struct se_cmd *cmd)
|
|
|
-{
|
|
|
- struct se_device *dev = cmd->se_dev;
|
|
|
- unsigned char *buf;
|
|
|
- unsigned long long blocks_long = dev->transport->get_blocks(dev);
|
|
|
- u32 blocks;
|
|
|
-
|
|
|
- if (blocks_long >= 0x00000000ffffffff)
|
|
|
- blocks = 0xffffffff;
|
|
|
- else
|
|
|
- blocks = (u32)blocks_long;
|
|
|
-
|
|
|
- buf = transport_kmap_data_sg(cmd);
|
|
|
-
|
|
|
- buf[0] = (blocks >> 24) & 0xff;
|
|
|
- buf[1] = (blocks >> 16) & 0xff;
|
|
|
- buf[2] = (blocks >> 8) & 0xff;
|
|
|
- buf[3] = blocks & 0xff;
|
|
|
- buf[4] = (dev->se_sub_dev->se_dev_attrib.block_size >> 24) & 0xff;
|
|
|
- buf[5] = (dev->se_sub_dev->se_dev_attrib.block_size >> 16) & 0xff;
|
|
|
- buf[6] = (dev->se_sub_dev->se_dev_attrib.block_size >> 8) & 0xff;
|
|
|
- buf[7] = dev->se_sub_dev->se_dev_attrib.block_size & 0xff;
|
|
|
-
|
|
|
- transport_kunmap_data_sg(cmd);
|
|
|
-
|
|
|
- target_complete_cmd(cmd, GOOD);
|
|
|
- return 0;
|
|
|
-}
|
|
|
-
|
|
|
-int target_emulate_readcapacity_16(struct se_cmd *cmd)
|
|
|
-{
|
|
|
- struct se_device *dev = cmd->se_dev;
|
|
|
- unsigned char *buf;
|
|
|
- unsigned long long blocks = dev->transport->get_blocks(dev);
|
|
|
-
|
|
|
- buf = transport_kmap_data_sg(cmd);
|
|
|
-
|
|
|
- buf[0] = (blocks >> 56) & 0xff;
|
|
|
- buf[1] = (blocks >> 48) & 0xff;
|
|
|
- buf[2] = (blocks >> 40) & 0xff;
|
|
|
- buf[3] = (blocks >> 32) & 0xff;
|
|
|
- buf[4] = (blocks >> 24) & 0xff;
|
|
|
- buf[5] = (blocks >> 16) & 0xff;
|
|
|
- buf[6] = (blocks >> 8) & 0xff;
|
|
|
- buf[7] = blocks & 0xff;
|
|
|
- buf[8] = (dev->se_sub_dev->se_dev_attrib.block_size >> 24) & 0xff;
|
|
|
- buf[9] = (dev->se_sub_dev->se_dev_attrib.block_size >> 16) & 0xff;
|
|
|
- buf[10] = (dev->se_sub_dev->se_dev_attrib.block_size >> 8) & 0xff;
|
|
|
- buf[11] = dev->se_sub_dev->se_dev_attrib.block_size & 0xff;
|
|
|
- /*
|
|
|
- * Set Thin Provisioning Enable bit following sbc3r22 in section
|
|
|
- * READ CAPACITY (16) byte 14 if emulate_tpu or emulate_tpws is enabled.
|
|
|
- */
|
|
|
- if (dev->se_sub_dev->se_dev_attrib.emulate_tpu || dev->se_sub_dev->se_dev_attrib.emulate_tpws)
|
|
|
- buf[14] = 0x80;
|
|
|
-
|
|
|
- transport_kunmap_data_sg(cmd);
|
|
|
-
|
|
|
- target_complete_cmd(cmd, GOOD);
|
|
|
- return 0;
|
|
|
-}
|
|
|
-
|
|
|
-static int
|
|
|
-target_modesense_rwrecovery(unsigned char *p)
|
|
|
-{
|
|
|
- p[0] = 0x01;
|
|
|
- p[1] = 0x0a;
|
|
|
-
|
|
|
- return 12;
|
|
|
-}
|
|
|
-
|
|
|
-static int
|
|
|
-target_modesense_control(struct se_device *dev, unsigned char *p)
|
|
|
-{
|
|
|
- p[0] = 0x0a;
|
|
|
- p[1] = 0x0a;
|
|
|
- p[2] = 2;
|
|
|
- /*
|
|
|
- * From spc4r23, 7.4.7 Control mode page
|
|
|
- *
|
|
|
- * The QUEUE ALGORITHM MODIFIER field (see table 368) specifies
|
|
|
- * restrictions on the algorithm used for reordering commands
|
|
|
- * having the SIMPLE task attribute (see SAM-4).
|
|
|
- *
|
|
|
- * Table 368 -- QUEUE ALGORITHM MODIFIER field
|
|
|
- * Code Description
|
|
|
- * 0h Restricted reordering
|
|
|
- * 1h Unrestricted reordering allowed
|
|
|
- * 2h to 7h Reserved
|
|
|
- * 8h to Fh Vendor specific
|
|
|
- *
|
|
|
- * A value of zero in the QUEUE ALGORITHM MODIFIER field specifies that
|
|
|
- * the device server shall order the processing sequence of commands
|
|
|
- * having the SIMPLE task attribute such that data integrity is maintained
|
|
|
- * for that I_T nexus (i.e., if the transmission of new SCSI transport protocol
|
|
|
- * requests is halted at any time, the final value of all data observable
|
|
|
- * on the medium shall be the same as if all the commands had been processed
|
|
|
- * with the ORDERED task attribute).
|
|
|
- *
|
|
|
- * A value of one in the QUEUE ALGORITHM MODIFIER field specifies that the
|
|
|
- * device server may reorder the processing sequence of commands having the
|
|
|
- * SIMPLE task attribute in any manner. Any data integrity exposures related to
|
|
|
- * command sequence order shall be explicitly handled by the application client
|
|
|
- * through the selection of appropriate ommands and task attributes.
|
|
|
- */
|
|
|
- p[3] = (dev->se_sub_dev->se_dev_attrib.emulate_rest_reord == 1) ? 0x00 : 0x10;
|
|
|
- /*
|
|
|
- * From spc4r17, section 7.4.6 Control mode Page
|
|
|
- *
|
|
|
- * Unit Attention interlocks control (UN_INTLCK_CTRL) to code 00b
|
|
|
- *
|
|
|
- * 00b: The logical unit shall clear any unit attention condition
|
|
|
- * reported in the same I_T_L_Q nexus transaction as a CHECK CONDITION
|
|
|
- * status and shall not establish a unit attention condition when a com-
|
|
|
- * mand is completed with BUSY, TASK SET FULL, or RESERVATION CONFLICT
|
|
|
- * status.
|
|
|
- *
|
|
|
- * 10b: The logical unit shall not clear any unit attention condition
|
|
|
- * reported in the same I_T_L_Q nexus transaction as a CHECK CONDITION
|
|
|
- * status and shall not establish a unit attention condition when
|
|
|
- * a command is completed with BUSY, TASK SET FULL, or RESERVATION
|
|
|
- * CONFLICT status.
|
|
|
- *
|
|
|
- * 11b a The logical unit shall not clear any unit attention condition
|
|
|
- * reported in the same I_T_L_Q nexus transaction as a CHECK CONDITION
|
|
|
- * status and shall establish a unit attention condition for the
|
|
|
- * initiator port associated with the I_T nexus on which the BUSY,
|
|
|
- * TASK SET FULL, or RESERVATION CONFLICT status is being returned.
|
|
|
- * Depending on the status, the additional sense code shall be set to
|
|
|
- * PREVIOUS BUSY STATUS, PREVIOUS TASK SET FULL STATUS, or PREVIOUS
|
|
|
- * RESERVATION CONFLICT STATUS. Until it is cleared by a REQUEST SENSE
|
|
|
- * command, a unit attention condition shall be established only once
|
|
|
- * for a BUSY, TASK SET FULL, or RESERVATION CONFLICT status regardless
|
|
|
- * to the number of commands completed with one of those status codes.
|
|
|
- */
|
|
|
- p[4] = (dev->se_sub_dev->se_dev_attrib.emulate_ua_intlck_ctrl == 2) ? 0x30 :
|
|
|
- (dev->se_sub_dev->se_dev_attrib.emulate_ua_intlck_ctrl == 1) ? 0x20 : 0x00;
|
|
|
- /*
|
|
|
- * From spc4r17, section 7.4.6 Control mode Page
|
|
|
- *
|
|
|
- * Task Aborted Status (TAS) bit set to zero.
|
|
|
- *
|
|
|
- * A task aborted status (TAS) bit set to zero specifies that aborted
|
|
|
- * tasks shall be terminated by the device server without any response
|
|
|
- * to the application client. A TAS bit set to one specifies that tasks
|
|
|
- * aborted by the actions of an I_T nexus other than the I_T nexus on
|
|
|
- * which the command was received shall be completed with TASK ABORTED
|
|
|
- * status (see SAM-4).
|
|
|
- */
|
|
|
- p[5] = (dev->se_sub_dev->se_dev_attrib.emulate_tas) ? 0x40 : 0x00;
|
|
|
- p[8] = 0xff;
|
|
|
- p[9] = 0xff;
|
|
|
- p[11] = 30;
|
|
|
-
|
|
|
- return 12;
|
|
|
-}
|
|
|
-
|
|
|
-static int
|
|
|
-target_modesense_caching(struct se_device *dev, unsigned char *p)
|
|
|
-{
|
|
|
- p[0] = 0x08;
|
|
|
- p[1] = 0x12;
|
|
|
- if (dev->se_sub_dev->se_dev_attrib.emulate_write_cache > 0)
|
|
|
- p[2] = 0x04; /* Write Cache Enable */
|
|
|
- p[12] = 0x20; /* Disabled Read Ahead */
|
|
|
-
|
|
|
- return 20;
|
|
|
-}
|
|
|
-
|
|
|
-static void
|
|
|
-target_modesense_write_protect(unsigned char *buf, int type)
|
|
|
-{
|
|
|
- /*
|
|
|
- * I believe that the WP bit (bit 7) in the mode header is the same for
|
|
|
- * all device types..
|
|
|
- */
|
|
|
- switch (type) {
|
|
|
- case TYPE_DISK:
|
|
|
- case TYPE_TAPE:
|
|
|
- default:
|
|
|
- buf[0] |= 0x80; /* WP bit */
|
|
|
- break;
|
|
|
- }
|
|
|
-}
|
|
|
-
|
|
|
-static void
|
|
|
-target_modesense_dpofua(unsigned char *buf, int type)
|
|
|
-{
|
|
|
- switch (type) {
|
|
|
- case TYPE_DISK:
|
|
|
- buf[0] |= 0x10; /* DPOFUA bit */
|
|
|
- break;
|
|
|
- default:
|
|
|
- break;
|
|
|
- }
|
|
|
-}
|
|
|
-
|
|
|
-int target_emulate_modesense(struct se_cmd *cmd)
|
|
|
-{
|
|
|
- struct se_device *dev = cmd->se_dev;
|
|
|
- char *cdb = cmd->t_task_cdb;
|
|
|
- unsigned char *rbuf;
|
|
|
- int type = dev->transport->get_device_type(dev);
|
|
|
- int ten = (cmd->t_task_cdb[0] == MODE_SENSE_10);
|
|
|
- int offset = ten ? 8 : 4;
|
|
|
- int length = 0;
|
|
|
- unsigned char buf[SE_MODE_PAGE_BUF];
|
|
|
-
|
|
|
- memset(buf, 0, SE_MODE_PAGE_BUF);
|
|
|
-
|
|
|
- switch (cdb[2] & 0x3f) {
|
|
|
- case 0x01:
|
|
|
- length = target_modesense_rwrecovery(&buf[offset]);
|
|
|
- break;
|
|
|
- case 0x08:
|
|
|
- length = target_modesense_caching(dev, &buf[offset]);
|
|
|
- break;
|
|
|
- case 0x0a:
|
|
|
- length = target_modesense_control(dev, &buf[offset]);
|
|
|
- break;
|
|
|
- case 0x3f:
|
|
|
- length = target_modesense_rwrecovery(&buf[offset]);
|
|
|
- length += target_modesense_caching(dev, &buf[offset+length]);
|
|
|
- length += target_modesense_control(dev, &buf[offset+length]);
|
|
|
- break;
|
|
|
- default:
|
|
|
- pr_err("MODE SENSE: unimplemented page/subpage: 0x%02x/0x%02x\n",
|
|
|
- cdb[2] & 0x3f, cdb[3]);
|
|
|
- cmd->scsi_sense_reason = TCM_UNKNOWN_MODE_PAGE;
|
|
|
- return -EINVAL;
|
|
|
- }
|
|
|
- offset += length;
|
|
|
-
|
|
|
- if (ten) {
|
|
|
- offset -= 2;
|
|
|
- buf[0] = (offset >> 8) & 0xff;
|
|
|
- buf[1] = offset & 0xff;
|
|
|
-
|
|
|
- if ((cmd->se_lun->lun_access & TRANSPORT_LUNFLAGS_READ_ONLY) ||
|
|
|
- (cmd->se_deve &&
|
|
|
- (cmd->se_deve->lun_flags & TRANSPORT_LUNFLAGS_READ_ONLY)))
|
|
|
- target_modesense_write_protect(&buf[3], type);
|
|
|
-
|
|
|
- if ((dev->se_sub_dev->se_dev_attrib.emulate_write_cache > 0) &&
|
|
|
- (dev->se_sub_dev->se_dev_attrib.emulate_fua_write > 0))
|
|
|
- target_modesense_dpofua(&buf[3], type);
|
|
|
-
|
|
|
- if ((offset + 2) > cmd->data_length)
|
|
|
- offset = cmd->data_length;
|
|
|
-
|
|
|
- } else {
|
|
|
- offset -= 1;
|
|
|
- buf[0] = offset & 0xff;
|
|
|
-
|
|
|
- if ((cmd->se_lun->lun_access & TRANSPORT_LUNFLAGS_READ_ONLY) ||
|
|
|
- (cmd->se_deve &&
|
|
|
- (cmd->se_deve->lun_flags & TRANSPORT_LUNFLAGS_READ_ONLY)))
|
|
|
- target_modesense_write_protect(&buf[2], type);
|
|
|
-
|
|
|
- if ((dev->se_sub_dev->se_dev_attrib.emulate_write_cache > 0) &&
|
|
|
- (dev->se_sub_dev->se_dev_attrib.emulate_fua_write > 0))
|
|
|
- target_modesense_dpofua(&buf[2], type);
|
|
|
-
|
|
|
- if ((offset + 1) > cmd->data_length)
|
|
|
- offset = cmd->data_length;
|
|
|
- }
|
|
|
-
|
|
|
- rbuf = transport_kmap_data_sg(cmd);
|
|
|
- memcpy(rbuf, buf, offset);
|
|
|
- transport_kunmap_data_sg(cmd);
|
|
|
-
|
|
|
- target_complete_cmd(cmd, GOOD);
|
|
|
- return 0;
|
|
|
-}
|
|
|
-
|
|
|
-int target_emulate_request_sense(struct se_cmd *cmd)
|
|
|
-{
|
|
|
- unsigned char *cdb = cmd->t_task_cdb;
|
|
|
- unsigned char *buf;
|
|
|
- u8 ua_asc = 0, ua_ascq = 0;
|
|
|
- int err = 0;
|
|
|
-
|
|
|
- if (cdb[1] & 0x01) {
|
|
|
- pr_err("REQUEST_SENSE description emulation not"
|
|
|
- " supported\n");
|
|
|
- cmd->scsi_sense_reason = TCM_INVALID_CDB_FIELD;
|
|
|
- return -ENOSYS;
|
|
|
- }
|
|
|
-
|
|
|
- buf = transport_kmap_data_sg(cmd);
|
|
|
-
|
|
|
- if (!core_scsi3_ua_clear_for_request_sense(cmd, &ua_asc, &ua_ascq)) {
|
|
|
- /*
|
|
|
- * CURRENT ERROR, UNIT ATTENTION
|
|
|
- */
|
|
|
- buf[0] = 0x70;
|
|
|
- buf[SPC_SENSE_KEY_OFFSET] = UNIT_ATTENTION;
|
|
|
-
|
|
|
- if (cmd->data_length < 18) {
|
|
|
- buf[7] = 0x00;
|
|
|
- err = -EINVAL;
|
|
|
- goto end;
|
|
|
- }
|
|
|
- /*
|
|
|
- * The Additional Sense Code (ASC) from the UNIT ATTENTION
|
|
|
- */
|
|
|
- buf[SPC_ASC_KEY_OFFSET] = ua_asc;
|
|
|
- buf[SPC_ASCQ_KEY_OFFSET] = ua_ascq;
|
|
|
- buf[7] = 0x0A;
|
|
|
- } else {
|
|
|
- /*
|
|
|
- * CURRENT ERROR, NO SENSE
|
|
|
- */
|
|
|
- buf[0] = 0x70;
|
|
|
- buf[SPC_SENSE_KEY_OFFSET] = NO_SENSE;
|
|
|
-
|
|
|
- if (cmd->data_length < 18) {
|
|
|
- buf[7] = 0x00;
|
|
|
- err = -EINVAL;
|
|
|
- goto end;
|
|
|
- }
|
|
|
- /*
|
|
|
- * NO ADDITIONAL SENSE INFORMATION
|
|
|
- */
|
|
|
- buf[SPC_ASC_KEY_OFFSET] = 0x00;
|
|
|
- buf[7] = 0x0A;
|
|
|
- }
|
|
|
-
|
|
|
-end:
|
|
|
- transport_kunmap_data_sg(cmd);
|
|
|
- target_complete_cmd(cmd, GOOD);
|
|
|
- return 0;
|
|
|
-}
|
|
|
-
|
|
|
-/*
|
|
|
- * Used for TCM/IBLOCK and TCM/FILEIO for block/blk-lib.c level discard support.
|
|
|
- * Note this is not used for TCM/pSCSI passthrough
|
|
|
- */
|
|
|
-int target_emulate_unmap(struct se_cmd *cmd)
|
|
|
-{
|
|
|
- struct se_device *dev = cmd->se_dev;
|
|
|
- unsigned char *buf, *ptr = NULL;
|
|
|
- unsigned char *cdb = &cmd->t_task_cdb[0];
|
|
|
- sector_t lba;
|
|
|
- unsigned int size = cmd->data_length, range;
|
|
|
- int ret = 0, offset;
|
|
|
- unsigned short dl, bd_dl;
|
|
|
-
|
|
|
- if (!dev->transport->do_discard) {
|
|
|
- pr_err("UNMAP emulation not supported for: %s\n",
|
|
|
- dev->transport->name);
|
|
|
- cmd->scsi_sense_reason = TCM_UNSUPPORTED_SCSI_OPCODE;
|
|
|
- return -ENOSYS;
|
|
|
- }
|
|
|
-
|
|
|
- /* First UNMAP block descriptor starts at 8 byte offset */
|
|
|
- offset = 8;
|
|
|
- size -= 8;
|
|
|
- dl = get_unaligned_be16(&cdb[0]);
|
|
|
- bd_dl = get_unaligned_be16(&cdb[2]);
|
|
|
-
|
|
|
- buf = transport_kmap_data_sg(cmd);
|
|
|
-
|
|
|
- ptr = &buf[offset];
|
|
|
- pr_debug("UNMAP: Sub: %s Using dl: %hu bd_dl: %hu size: %hu"
|
|
|
- " ptr: %p\n", dev->transport->name, dl, bd_dl, size, ptr);
|
|
|
-
|
|
|
- while (size) {
|
|
|
- lba = get_unaligned_be64(&ptr[0]);
|
|
|
- range = get_unaligned_be32(&ptr[8]);
|
|
|
- pr_debug("UNMAP: Using lba: %llu and range: %u\n",
|
|
|
- (unsigned long long)lba, range);
|
|
|
-
|
|
|
- ret = dev->transport->do_discard(dev, lba, range);
|
|
|
- if (ret < 0) {
|
|
|
- pr_err("blkdev_issue_discard() failed: %d\n",
|
|
|
- ret);
|
|
|
- goto err;
|
|
|
- }
|
|
|
-
|
|
|
- ptr += 16;
|
|
|
- size -= 16;
|
|
|
- }
|
|
|
-
|
|
|
-err:
|
|
|
- transport_kunmap_data_sg(cmd);
|
|
|
- if (!ret)
|
|
|
- target_complete_cmd(cmd, GOOD);
|
|
|
- return ret;
|
|
|
-}
|
|
|
-
|
|
|
-/*
|
|
|
- * Used for TCM/IBLOCK and TCM/FILEIO for block/blk-lib.c level discard support.
|
|
|
- * Note this is not used for TCM/pSCSI passthrough
|
|
|
- */
|
|
|
-int target_emulate_write_same(struct se_cmd *cmd)
|
|
|
-{
|
|
|
- struct se_device *dev = cmd->se_dev;
|
|
|
- sector_t range;
|
|
|
- sector_t lba = cmd->t_task_lba;
|
|
|
- u32 num_blocks;
|
|
|
- int ret;
|
|
|
-
|
|
|
- if (!dev->transport->do_discard) {
|
|
|
- pr_err("WRITE_SAME emulation not supported"
|
|
|
- " for: %s\n", dev->transport->name);
|
|
|
- cmd->scsi_sense_reason = TCM_UNSUPPORTED_SCSI_OPCODE;
|
|
|
- return -ENOSYS;
|
|
|
- }
|
|
|
-
|
|
|
- if (cmd->t_task_cdb[0] == WRITE_SAME)
|
|
|
- num_blocks = get_unaligned_be16(&cmd->t_task_cdb[7]);
|
|
|
- else if (cmd->t_task_cdb[0] == WRITE_SAME_16)
|
|
|
- num_blocks = get_unaligned_be32(&cmd->t_task_cdb[10]);
|
|
|
- else /* WRITE_SAME_32 via VARIABLE_LENGTH_CMD */
|
|
|
- num_blocks = get_unaligned_be32(&cmd->t_task_cdb[28]);
|
|
|
-
|
|
|
- /*
|
|
|
- * Use the explicit range when non zero is supplied, otherwise calculate
|
|
|
- * the remaining range based on ->get_blocks() - starting LBA.
|
|
|
- */
|
|
|
- if (num_blocks != 0)
|
|
|
- range = num_blocks;
|
|
|
- else
|
|
|
- range = (dev->transport->get_blocks(dev) - lba) + 1;
|
|
|
-
|
|
|
- pr_debug("WRITE_SAME UNMAP: LBA: %llu Range: %llu\n",
|
|
|
- (unsigned long long)lba, (unsigned long long)range);
|
|
|
-
|
|
|
- ret = dev->transport->do_discard(dev, lba, range);
|
|
|
- if (ret < 0) {
|
|
|
- pr_debug("blkdev_issue_discard() failed for WRITE_SAME\n");
|
|
|
- return ret;
|
|
|
- }
|
|
|
-
|
|
|
- target_complete_cmd(cmd, GOOD);
|
|
|
- return 0;
|
|
|
-}
|
|
|
-
|
|
|
-int target_emulate_synchronize_cache(struct se_cmd *cmd)
|
|
|
-{
|
|
|
- if (!cmd->se_dev->transport->do_sync_cache) {
|
|
|
- pr_err("SYNCHRONIZE_CACHE emulation not supported"
|
|
|
- " for: %s\n", cmd->se_dev->transport->name);
|
|
|
- cmd->scsi_sense_reason = TCM_UNSUPPORTED_SCSI_OPCODE;
|
|
|
- return -ENOSYS;
|
|
|
- }
|
|
|
-
|
|
|
- cmd->se_dev->transport->do_sync_cache(cmd);
|
|
|
- return 0;
|
|
|
-}
|
|
|
-
|
|
|
-int target_emulate_noop(struct se_cmd *cmd)
|
|
|
-{
|
|
|
- target_complete_cmd(cmd, GOOD);
|
|
|
- return 0;
|
|
|
-}
|
Christoph Hellwig