diff options
Diffstat (limited to 'drivers/target/target_core_cdb.c')
| -rw-r--r-- | drivers/target/target_core_cdb.c | 1131 |
1 files changed, 0 insertions, 1131 deletions
diff --git a/drivers/target/target_core_cdb.c b/drivers/target/target_core_cdb.c deleted file mode 100644 index 366080baf47..00000000000 --- a/drivers/target/target_core_cdb.c +++ /dev/null @@ -1,1131 +0,0 @@ -/* - * CDB emulation for non-READ/WRITE commands. - * - * Copyright (c) 2002, 2003, 2004, 2005 PyX Technologies, Inc. - * Copyright (c) 2005, 2006, 2007 SBE, Inc. - * Copyright (c) 2007-2010 Rising Tide Systems - * Copyright (c) 2008-2010 Linux-iSCSI.org - * - * Nicholas A. Bellinger <nab@kernel.org> - * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU General Public License as published by - * the Free Software Foundation; either version 2 of the License, or - * (at your option) any later version. - * - * This program is distributed in the hope that it will be useful, - * but WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the - * GNU General Public License for more details. - * - * You should have received a copy of the GNU General Public License - * along with this program; if not, write to the Free Software - * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. - */ - -#include <asm/unaligned.h> -#include <scsi/scsi.h> - -#include <target/target_core_base.h> -#include <target/target_core_transport.h> -#include <target/target_core_fabric_ops.h> -#include "target_core_ua.h" - -static void -target_fill_alua_data(struct se_port *port, unsigned char *buf) -{ - struct t10_alua_tg_pt_gp *tg_pt_gp; - struct t10_alua_tg_pt_gp_member *tg_pt_gp_mem; - - /* - * Set SCCS for MAINTENANCE_IN + REPORT_TARGET_PORT_GROUPS. - */ - buf[5] = 0x80; - - /* - * Set TPGS field for explict and/or implict ALUA access type - * and opteration. - * - * See spc4r17 section 6.4.2 Table 135 - */ - if (!port) - return; - tg_pt_gp_mem = port->sep_alua_tg_pt_gp_mem; - if (!tg_pt_gp_mem) - return; - - spin_lock(&tg_pt_gp_mem->tg_pt_gp_mem_lock); - tg_pt_gp = tg_pt_gp_mem->tg_pt_gp; - if (tg_pt_gp) - buf[5] |= tg_pt_gp->tg_pt_gp_alua_access_type; - spin_unlock(&tg_pt_gp_mem->tg_pt_gp_mem_lock); -} - -static int -target_emulate_inquiry_std(struct se_cmd *cmd) -{ - struct se_lun *lun = SE_LUN(cmd); - struct se_device *dev = SE_DEV(cmd); - unsigned char *buf = cmd->t_task->t_task_buf; - - /* - * Make sure we at least have 6 bytes of INQUIRY response - * payload going back for EVPD=0 - */ - if (cmd->data_length < 6) { - printk(KERN_ERR "SCSI Inquiry payload length: %u" - " too small for EVPD=0\n", cmd->data_length); - return -1; - } - - buf[0] = dev->transport->get_device_type(dev); - if (buf[0] == TYPE_TAPE) - buf[1] = 0x80; - buf[2] = dev->transport->get_device_rev(dev); - - /* - * Enable SCCS and TPGS fields for Emulated ALUA - */ - if (T10_ALUA(dev->se_sub_dev)->alua_type == SPC3_ALUA_EMULATED) - target_fill_alua_data(lun->lun_sep, buf); - - if (cmd->data_length < 8) { - buf[4] = 1; /* Set additional length to 1 */ - return 0; - } - - buf[7] = 0x32; /* Sync=1 and CmdQue=1 */ - - /* - * Do not include vendor, product, reversion info in INQUIRY - * response payload for cdbs with a small allocation length. - */ - if (cmd->data_length < 36) { - buf[4] = 3; /* Set additional length to 3 */ - return 0; - } - - snprintf((unsigned char *)&buf[8], 8, "LIO-ORG"); - snprintf((unsigned char *)&buf[16], 16, "%s", - &DEV_T10_WWN(dev)->model[0]); - snprintf((unsigned char *)&buf[32], 4, "%s", - &DEV_T10_WWN(dev)->revision[0]); - buf[4] = 31; /* Set additional length to 31 */ - return 0; -} - -/* supported vital product data pages */ -static int -target_emulate_evpd_00(struct se_cmd *cmd, unsigned char *buf) -{ - buf[1] = 0x00; - if (cmd->data_length < 8) - return 0; - - buf[4] = 0x0; - /* - * 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 (SE_DEV(cmd)->se_sub_dev->su_dev_flags & - SDF_EMULATED_VPD_UNIT_SERIAL) { - buf[3] = 3; - buf[5] = 0x80; - buf[6] = 0x83; - buf[7] = 0x86; - } - - return 0; -} - -/* unit serial number */ -static int -target_emulate_evpd_80(struct se_cmd *cmd, unsigned char *buf) -{ - struct se_device *dev = SE_DEV(cmd); - u16 len = 0; - - buf[1] = 0x80; - if (dev->se_sub_dev->su_dev_flags & - SDF_EMULATED_VPD_UNIT_SERIAL) { - u32 unit_serial_len; - - unit_serial_len = - strlen(&DEV_T10_WWN(dev)->unit_serial[0]); - unit_serial_len++; /* For NULL Terminator */ - - if (((len + 4) + unit_serial_len) > cmd->data_length) { - len += unit_serial_len; - buf[2] = ((len >> 8) & 0xff); - buf[3] = (len & 0xff); - return 0; - } - len += sprintf((unsigned char *)&buf[4], "%s", - &DEV_T10_WWN(dev)->unit_serial[0]); - len++; /* Extra Byte for NULL Terminator */ - buf[3] = len; - } - return 0; -} - -/* - * Device identification VPD, for a complete list of - * DESIGNATOR TYPEs see spc4r17 Table 459. - */ -static int -target_emulate_evpd_83(struct se_cmd *cmd, unsigned char *buf) -{ - struct se_device *dev = SE_DEV(cmd); - struct se_lun *lun = SE_LUN(cmd); - struct se_port *port = NULL; - struct se_portal_group *tpg = NULL; - struct t10_alua_lu_gp_member *lu_gp_mem; - struct t10_alua_tg_pt_gp *tg_pt_gp; - struct t10_alua_tg_pt_gp_member *tg_pt_gp_mem; - unsigned char binary, binary_new; - unsigned char *prod = &DEV_T10_WWN(dev)->model[0]; - u32 prod_len; - u32 unit_serial_len, off = 0; - int i; - u16 len = 0, id_len; - - buf[1] = 0x83; - 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->se_sub_dev->su_dev_flags & SDF_EMULATED_VPD_UNIT_SERIAL)) - goto check_t10_vend_desc; - - if (off + 20 > cmd->data_length) - goto check_t10_vend_desc; - - /* CODE SET == Binary */ - buf[off++] = 0x1; - - /* Set ASSOICATION == addressed logical unit: 0)b */ - buf[off] = 0x00; - - /* Identifier/Designator type == NAA identifier */ - buf[off++] = 0x3; - off++; - - /* Identifier/Designator length */ - buf[off++] = 0x10; - - /* - * Start NAA IEEE Registered Extended Identifier/Designator - */ - buf[off++] = (0x6 << 4); - - /* - * Use OpenFabrics IEEE Company ID: 00 14 05 - */ - buf[off++] = 0x01; - buf[off++] = 0x40; - buf[off] = (0x5 << 4); - - /* - * Return ConfigFS Unit Serial Number information for - * VENDOR_SPECIFIC_IDENTIFIER and - * VENDOR_SPECIFIC_IDENTIFIER_EXTENTION - */ - binary = transport_asciihex_to_binaryhex( - &DEV_T10_WWN(dev)->unit_serial[0]); - buf[off++] |= (binary & 0xf0) >> 4; - for (i = 0; i < 24; i += 2) { - binary_new = transport_asciihex_to_binaryhex( - &DEV_T10_WWN(dev)->unit_serial[i+2]); - buf[off] = (binary & 0x0f) << 4; - buf[off++] |= (binary_new & 0xf0) >> 4; - binary = binary_new; - } - len = 20; - off = (len + 4); - -check_t10_vend_desc: - /* - * T10 Vendor Identifier Page, see spc4r17 section 7.7.3.4 - */ - id_len = 8; /* For Vendor field */ - prod_len = 4; /* For VPD Header */ - prod_len += 8; /* For Vendor field */ - prod_len += strlen(prod); - prod_len++; /* For : */ - - if (dev->se_sub_dev->su_dev_flags & - SDF_EMULATED_VPD_UNIT_SERIAL) { - unit_serial_len = - strlen(&DEV_T10_WWN(dev)->unit_serial[0]); - unit_serial_len++; /* For NULL Terminator */ - - if ((len + (id_len + 4) + - (prod_len + unit_serial_len)) > - cmd->data_length) { - len += (prod_len + unit_serial_len); - goto check_port; - } - id_len += sprintf((unsigned char *)&buf[off+12], - "%s:%s", prod, - &DEV_T10_WWN(dev)->unit_serial[0]); - } - buf[off] = 0x2; /* ASCII */ - buf[off+1] = 0x1; /* T10 Vendor ID */ - buf[off+2] = 0x0; - memcpy((unsigned char *)&buf[off+4], "LIO-ORG", 8); - /* 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); - /* - * struct se_port is only set for INQUIRY VPD=1 through $FABRIC_MOD - */ -check_port: - port = lun->lun_sep; - if (port) { - struct t10_alua_lu_gp *lu_gp; - u32 padding, scsi_name_len; - u16 lu_gp_id = 0; - u16 tg_pt_gp_id = 0; - u16 tpgt; - - tpg = port->sep_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 - */ - if (((len + 4) + 8) > cmd->data_length) { - len += 8; - goto check_tpgi; - } - buf[off] = - (TPG_TFO(tpg)->get_fabric_proto_ident(tpg) << 4); - buf[off++] |= 0x1; /* CODE SET == Binary */ - buf[off] = 0x80; /* Set PIV=1 */ - /* Set ASSOICATION == 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; - buf[off++] = ((port->sep_rtpi >> 8) & 0xff); - buf[off++] = (port->sep_rtpi & 0xff); - 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 - */ -check_tpgi: - if (T10_ALUA(dev->se_sub_dev)->alua_type != - SPC3_ALUA_EMULATED) - goto check_scsi_name; - - if (((len + 4) + 8) > cmd->data_length) { - len += 8; - goto check_lu_gp; - } - tg_pt_gp_mem = port->sep_alua_tg_pt_gp_mem; - if (!tg_pt_gp_mem) - goto check_lu_gp; - - spin_lock(&tg_pt_gp_mem->tg_pt_gp_mem_lock); - tg_pt_gp = tg_pt_gp_mem->tg_pt_gp; - if (!(tg_pt_gp)) { - spin_unlock(&tg_pt_gp_mem->tg_pt_gp_mem_lock); - goto check_lu_gp; - } - tg_pt_gp_id = tg_pt_gp->tg_pt_gp_id; - spin_unlock(&tg_pt_gp_mem->tg_pt_gp_mem_lock); - - buf[off] = - (TPG_TFO(tpg)->get_fabric_proto_ident(tpg) << 4); - buf[off++] |= 0x1; /* CODE SET == Binary */ - buf[off] = 0x80; /* Set PIV=1 */ - /* Set ASSOICATION == 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 */ - buf[off++] = ((tg_pt_gp_id >> 8) & 0xff); - buf[off++] = (tg_pt_gp_id & 0xff); - len += 8; /* Header size + Designation descriptor */ - /* - * Logical Unit Group identifier, see spc4r17 - * section 7.7.3.8 - */ -check_lu_gp: - if (((len + 4) + 8) > cmd->data_length) { - len += 8; - goto check_scsi_name; - } - 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 */ - buf[off++] = ((lu_gp_id >> 8) & 0xff); - buf[off++] = (lu_gp_id & 0xff); - 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: - scsi_name_len = strlen(TPG_TFO(tpg)->tpg_get_wwn(tpg)); - /* UTF-8 ",t,0x<16-bit TPGT>" + NULL Terminator */ - scsi_name_len += 10; - /* Check for 4-byte padding */ - padding = ((-scsi_name_len) & 3); - if (padding != 0) - scsi_name_len += padding; - /* Header size + Designation descriptor */ - scsi_name_len += 4; - - if (((len + 4) + scsi_name_len) > cmd->data_length) { - len += scsi_name_len; - goto set_len; - } - buf[off] = - (TPG_TFO(tpg)->get_fabric_proto_ident(tpg) << 4); - buf[off++] |= 0x3; /* CODE SET == UTF-8 */ - buf[off] = 0x80; /* Set PIV=1 */ - /* Set ASSOICATION == 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_TFO(tpg)->tpg_get_tag(tpg); - scsi_name_len = sprintf(&buf[off], "%s,t,0x%04x", - TPG_TFO(tpg)->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); - } -set_len: - 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) -{ - if (cmd->data_length < 60) - return 0; - - buf[1] = 0x86; - buf[2] = 0x3c; - /* Set HEADSUP, ORDSUP, SIMPSUP */ - buf[5] = 0x07; - - /* If WriteCache emulation is enabled, set V_SUP */ - if (DEV_ATTRIB(SE_DEV(cmd))->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 = SE_DEV(cmd); - 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_ATTRIB(dev)->emulate_tpu || DEV_ATTRIB(dev)->emulate_tpws) - have_tp = 1; - - if (cmd->data_length < (0x10 + 4)) { - printk(KERN_INFO "Received data_length: %u" - " too small for EVPD 0xb0\n", - cmd->data_length); - return -1; - } - - if (have_tp && cmd->data_length < (0x3c + 4)) { - printk(KERN_INFO "Received data_length: %u" - " too small for TPE=1 EVPD 0xb0\n", - cmd->data_length); - have_tp = 0; - } - - buf[0] = dev->transport->get_device_type(dev); - buf[1] = 0xb0; - buf[3] = have_tp ? 0x3c : 0x10; - - /* - * Set OPTIMAL TRANSFER LENGTH GRANULARITY - */ - put_unaligned_be16(1, &buf[6]); - - /* - * Set MAXIMUM TRANSFER LENGTH - */ - put_unaligned_be32(DEV_ATTRIB(dev)->max_sectors, &buf[8]); - - /* - * Set OPTIMAL TRANSFER LENGTH - */ - put_unaligned_be32(DEV_ATTRIB(dev)->optimal_sectors, &buf[12]); - - /* - * Exit now if we don't support TP or the initiator sent a too - * short buffer. - */ - if (!have_tp || cmd->data_length < (0x3c + 4)) - return 0; - - /* - * Set MAXIMUM UNMAP LBA COUNT - */ - put_unaligned_be32(DEV_ATTRIB(dev)->max_unmap_lba_count, &buf[20]); - - /* - * Set MAXIMUM UNMAP BLOCK DESCRIPTOR COUNT - */ - put_unaligned_be32(DEV_ATTRIB(dev)->max_unmap_block_desc_count, - &buf[24]); - - /* - * Set OPTIMAL UNMAP GRANULARITY - */ - put_unaligned_be32(DEV_ATTRIB(dev)->unmap_granularity, &buf[28]); - - /* - * UNMAP GRANULARITY ALIGNMENT - */ - put_unaligned_be32(DEV_ATTRIB(dev)->unmap_granularity_alignment, - &buf[32]); - if (DEV_ATTRIB(dev)->unmap_granularity_alignment != 0) - buf[32] |= 0x80; /* Set the UGAVALID bit */ - - return 0; -} - -/* Thin Provisioning VPD */ -static int -target_emulate_evpd_b2(struct se_cmd *cmd, unsigned char *buf) -{ - struct se_device *dev = SE_DEV(cmd); - - /* - * 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); - buf[1] = 0xb2; - - /* - * 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_ATTRIB(dev)->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_ATTRIB(dev)->emulate_tpws != 0) - buf[5] |= 0x40; - - return 0; -} - -static int -target_emulate_inquiry(struct se_cmd *cmd) -{ - struct se_device *dev = SE_DEV(cmd); - unsigned char *buf = cmd->t_task->t_task_buf; - unsigned char *cdb = cmd->t_task->t_task_cdb; - - if (!(cdb[1] & 0x1)) - return target_emulate_inquiry_std(cmd); - - /* - * Make sure we at least have 4 bytes of INQUIRY response - * payload for 0x00 going back for EVPD=1. Note that 0x80 - * and 0x83 will check for enough payload data length and - * jump to set_len: label when there is not enough inquiry EVPD - * payload length left for the next outgoing EVPD metadata - */ - if (cmd->data_length < 4) { - printk(KERN_ERR "SCSI Inquiry payload length: %u" - " too small for EVPD=1\n", cmd->data_length); - return -1; - } - buf[0] = dev->transport->get_device_type(dev); - - switch (cdb[2]) { - case 0x00: - return target_emulate_evpd_00(cmd, buf); - case 0x80: - return target_emulate_evpd_80(cmd, buf); - case 0x83: - return target_emulate_evpd_83(cmd, buf); - case 0x86: - return target_emulate_evpd_86(cmd, buf); - case 0xb0: - return target_emulate_evpd_b0(cmd, buf); - case 0xb2: - return target_emulate_evpd_b2(cmd, buf); - default: - printk(KERN_ERR "Unknown VPD Code: 0x%02x\n", cdb[2]); - return -1; - } - - return 0; -} - -static int -target_emulate_readcapacity(struct se_cmd *cmd) -{ - struct se_device *dev = SE_DEV(cmd); - unsigned char *buf = cmd->t_task->t_task_buf; - u32 blocks = dev->transport->get_blocks(dev); - - buf[0] = (blocks >> 24) & 0xff; - buf[1] = (blocks >> 16) & 0xff; - buf[2] = (blocks >> 8) & 0xff; - buf[3] = blocks & 0xff; - buf[4] = (DEV_ATTRIB(dev)->block_size >> 24) & 0xff; - buf[5] = (DEV_ATTRIB(dev)->block_size >> 16) & 0xff; - buf[6] = (DEV_ATTRIB(dev)->block_size >> 8) & 0xff; - buf[7] = DEV_ATTRIB(dev)->block_size & 0xff; - /* - * Set max 32-bit blocks to signal SERVICE ACTION READ_CAPACITY_16 - */ - if (DEV_ATTRIB(dev)->emulate_tpu || DEV_ATTRIB(dev)->emulate_tpws) - put_unaligned_be32(0xFFFFFFFF, &buf[0]); - - return 0; -} - -static int -target_emulate_readcapacity_16(struct se_cmd *cmd) -{ - struct se_device *dev = SE_DEV(cmd); - unsigned char *buf = cmd->t_task->t_task_buf; - unsigned long long blocks = dev->transport->get_blocks(dev); - - 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_ATTRIB(dev)->block_size >> 24) & 0xff; - buf[9] = (DEV_ATTRIB(dev)->block_size >> 16) & 0xff; - buf[10] = (DEV_ATTRIB(dev)->block_size >> 8) & 0xff; - buf[11] = DEV_ATTRIB(dev)->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_ATTRIB(dev)->emulate_tpu || DEV_ATTRIB(dev)->emulate_tpws) - buf[14] = 0x80; - - 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 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_ATTRIB(dev)->emulate_ua_intlck_ctrl == 2) ? 0x30 : - (DEV_ATTRIB(dev)->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_ATTRIB(dev)->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_ATTRIB(dev)->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; - } -} - -static int -target_emulate_modesense(struct se_cmd *cmd, int ten) -{ - struct se_device *dev = SE_DEV(cmd); - char *cdb = cmd->t_task->t_task_cdb; - unsigned char *rbuf = cmd->t_task->t_task_buf; - int type = dev->transport->get_device_type(dev); - 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: - printk(KERN_ERR "Got Unknown Mode Page: 0x%02x\n", - cdb[2] & 0x3f); - return PYX_TRANSPORT_UNKNOWN_MODE_PAGE; - } - offset += length; - - if (ten) { - offset -= 2; - buf[0] = (offset >> 8) & 0xff; - buf[1] = offset & 0xff; - - if ((SE_LUN(cmd)->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_ATTRIB(dev)->emulate_write_cache > 0) && - (DEV_ATTRIB(dev)->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 ((SE_LUN(cmd)->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_ATTRIB(dev)->emulate_write_cache > 0) && - (DEV_ATTRIB(dev)->emulate_fua_write > 0)) - target_modesense_dpofua(&buf[2], type); - - if ((offset + 1) > cmd->data_length) - offset = cmd->data_length; - } - memcpy(rbuf, buf, offset); - - return 0; -} - -static int -target_emulate_request_sense(struct se_cmd *cmd) -{ - unsigned char *cdb = cmd->t_task->t_task_cdb; - unsigned char *buf = cmd->t_task->t_task_buf; - u8 ua_asc = 0, ua_ascq = 0; - - if (cdb[1] & 0x01) { - printk(KERN_ERR "REQUEST_SENSE description emulation not" - " supported\n"); - return PYX_TRANSPORT_INVALID_CDB_FIELD; - } - 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; - /* - * Make sure request data length is enough for additional - * sense data. - */ - if (cmd->data_length <= 18) { - buf[7] = 0x00; - return 0; - } - /* - * 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; - /* - * Make sure request data length is enough for additional - * sense data. - */ - if (cmd->data_length <= 18) { - buf[7] = 0x00; - return 0; - } - /* - * NO ADDITIONAL SENSE INFORMATION - */ - buf[SPC_ASC_KEY_OFFSET] = 0x00; - buf[7] = 0x0A; - } - - 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 - */ -static int -target_emulate_unmap(struct se_task *task) -{ - struct se_cmd *cmd = TASK_CMD(task); - struct se_device *dev = SE_DEV(cmd); - unsigned char *buf = cmd->t_task->t_task_buf, *ptr = NULL; - unsigned char *cdb = &cmd->t_task->t_task_cdb[0]; - sector_t lba; - unsigned int size = cmd->data_length, range; - int ret, offset; - unsigned short dl, bd_dl; - - /* 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]); - ptr = &buf[offset]; - printk(KERN_INFO "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]); - printk(KERN_INFO "UNMAP: Using lba: %llu and range: %u\n", - (unsigned long long)lba, range); - - ret = dev->transport->do_discard(dev, lba, range); - if (ret < 0) { - printk(KERN_ERR "blkdev_issue_discard() failed: %d\n", - ret); - return -1; - } - - ptr += 16; - size -= 16; - } - - task->task_scsi_status = GOOD; - transport_complete_task(task, 1); - 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 - */ -static int -target_emulate_write_same(struct se_task *task) -{ - struct se_cmd *cmd = TASK_CMD(task); - struct se_device *dev = SE_DEV(cmd); - sector_t lba = cmd->t_task->t_task_lba; - unsigned int range; - int ret; - - range = (cmd->data_length / DEV_ATTRIB(dev)->block_size); - - printk(KERN_INFO "WRITE_SAME UNMAP: LBA: %llu Range: %u\n", - (unsigned long long)lba, range); - - ret = dev->transport->do_discard(dev, lba, range); - if (ret < 0) { - printk(KERN_INFO "blkdev_issue_discard() failed for WRITE_SAME\n"); - return -1; - } - - task->task_scsi_status = GOOD; - transport_complete_task(task, 1); - return 0; -} - -int -transport_emulate_control_cdb(struct se_task *task) -{ - struct se_cmd *cmd = TASK_CMD(task); - struct se_device *dev = SE_DEV(cmd); - unsigned short service_action; - int ret = 0; - - switch (cmd->t_task->t_task_cdb[0]) { - case INQUIRY: - ret = target_emulate_inquiry(cmd); - break; - case READ_CAPACITY: - ret = target_emulate_readcapacity(cmd); - break; - case MODE_SENSE: - ret = target_emulate_modesense(cmd, 0); - break; - case MODE_SENSE_10: - ret = target_emulate_modesense(cmd, 1); - break; - case SERVICE_ACTION_IN: - switch (cmd->t_task->t_task_cdb[1] & 0x1f) { - case SAI_READ_CAPACITY_16: - ret = target_emulate_readcapacity_16(cmd); - break; - default: - printk(KERN_ERR "Unsupported SA: 0x%02x\n", - cmd->t_task->t_task_cdb[1] & 0x1f); - return PYX_TRANSPORT_UNKNOWN_SAM_OPCODE; - } - break; - case REQUEST_SENSE: - ret = target_emulate_request_sense(cmd); - break; - case UNMAP: - if (!dev->transport->do_discard) { - printk(KERN_ERR "UNMAP emulation not supported for: %s\n", - dev->transport->name); - return PYX_TRANSPORT_UNKNOWN_SAM_OPCODE; - } - ret = target_emulate_unmap(task); - break; - case WRITE_SAME_16: - if (!dev->transport->do_discard) { - printk(KERN_ERR "WRITE_SAME_16 emulation not supported" - " for: %s\n", dev->transport->name); - return PYX_TRANSPORT_UNKNOWN_SAM_OPCODE; - } - ret = target_emulate_write_same(task); - break; - case VARIABLE_LENGTH_CMD: - service_action = - get_unaligned_be16(&cmd->t_task->t_task_cdb[8]); - switch (service_action) { - case WRITE_SAME_32: - if (!dev->transport->do_discard) { - printk(KERN_ERR "WRITE_SAME_32 SA emulation not" - " supported for: %s\n", - dev->transport->name); - return PYX_TRANSPORT_UNKNOWN_SAM_OPCODE; - } - ret = target_emulate_write_same(task); - break; - default: - printk(KERN_ERR "Unsupported VARIABLE_LENGTH_CMD SA:" - " 0x%02x\n", service_action); - break; - } - break; - case SYNCHRONIZE_CACHE: - case 0x91: /* SYNCHRONIZE_CACHE_16: */ - if (!dev->transport->do_sync_cache) { - printk(KERN_ERR - "SYNCHRONIZE_CACHE emulation not supported" - " for: %s\n", dev->transport->name); - return PYX_TRANSPORT_UNKNOWN_SAM_OPCODE; - } - dev->transport->do_sync_cache(task); - break; - case ALLOW_MEDIUM_REMOVAL: - case ERASE: - case REZERO_UNIT: - case SEEK_10: - case SPACE: - case START_STOP: - case TEST_UNIT_READY: - case VERIFY: - case WRITE_FILEMARKS: - break; - default: - printk(KERN_ERR "Unsupported SCSI Opcode: 0x%02x for %s\n", - cmd->t_task->t_task_cdb[0], dev->transport->name); - return PYX_TRANSPORT_UNKNOWN_SAM_OPCODE; - } - - if (ret < 0) - return ret; - task->task_scsi_status = GOOD; - transport_complete_task(task, 1); - - return PYX_TRANSPORT_SENT_TO_TRANSPORT; -} |