#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"
-int spc_parse_cdb(struct se_cmd *cmd, unsigned int *size, bool passthrough)
+static void spc_fill_alua_data(struct se_port *port, unsigned char *buf)
{
- struct se_subsystem_dev *su_dev = cmd->se_dev->se_sub_dev;
+ 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 spc_emulate_inquiry_std(struct se_cmd *cmd, char *buf)
+{
+ struct se_lun *lun = cmd->se_lun;
+ struct se_device *dev = cmd->se_dev;
+
+ /* Set RMB (removable media) for tape devices */
+ if (dev->transport->get_device_type(dev) == TYPE_TAPE)
+ buf[1] = 0x80;
+
+ buf[2] = dev->transport->get_device_rev(dev);
+
+ /*
+ * 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
+ */
+ if (dev->se_sub_dev->t10_alua.alua_type == SPC3_ALUA_EMULATED)
+ spc_fill_alua_data(lun->lun_sep, buf);
+
+ buf[7] = 0x2; /* CmdQue=1 */
+
+ snprintf(&buf[8], 8, "LIO-ORG");
+ snprintf(&buf[16], 16, "%s", dev->se_sub_dev->t10_wwn.model);
+ snprintf(&buf[32], 4, "%s", dev->se_sub_dev->t10_wwn.revision);
+ buf[4] = 31; /* Set additional length to 31 */
+
+ return 0;
+}
+
+/* unit serial number */
+static int spc_emulate_evpd_80(struct se_cmd *cmd, unsigned char *buf)
+{
+ struct se_device *dev = cmd->se_dev;
+ u16 len = 0;
+
+ if (dev->se_sub_dev->su_dev_flags &
+ SDF_EMULATED_VPD_UNIT_SERIAL) {
+ u32 unit_serial_len;
+
+ unit_serial_len = strlen(dev->se_sub_dev->t10_wwn.unit_serial);
+ unit_serial_len++; /* For NULL Terminator */
+
+ len += sprintf(&buf[4], "%s",
+ dev->se_sub_dev->t10_wwn.unit_serial);
+ len++; /* Extra Byte for NULL Terminator */
+ buf[3] = len;
+ }
+ return 0;
+}
+
+static void spc_parse_naa_6h_vendor_specific(struct se_device *dev,
+ unsigned char *buf)
+{
+ unsigned char *p = &dev->se_sub_dev->t10_wwn.unit_serial[0];
+ int cnt;
+ bool next = true;
+
+ /*
+ * Generate up to 36 bits of VENDOR SPECIFIC IDENTIFIER starting on
+ * byte 3 bit 3-0 for NAA IEEE Registered Extended DESIGNATOR field
+ * format, followed by 64 bits of VENDOR SPECIFIC IDENTIFIER EXTENSION
+ * to complete the payload. These are based from VPD=0x80 PRODUCT SERIAL
+ * NUMBER set via vpd_unit_serial in target_core_configfs.c to ensure
+ * per device uniqeness.
+ */
+ for (cnt = 0; *p && cnt < 13; p++) {
+ int val = hex_to_bin(*p);
+
+ if (val < 0)
+ continue;
+
+ if (next) {
+ next = false;
+ buf[cnt++] |= val;
+ } else {
+ next = true;
+ buf[cnt] = val << 4;
+ }
+ }
+}
+
+/*
+ * Device identification VPD, for a complete list of
+ * DESIGNATOR TYPEs see spc4r17 Table 459.
+ */
+static int 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_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 *prod = &dev->se_sub_dev->t10_wwn.model[0];
+ u32 prod_len;
+ u32 unit_serial_len, off = 0;
+ u16 len = 0, id_len;
+
+ off = 4;
+
+ /*
+ * NAA IEEE Registered Extended Assigned designator format, see
+ * spc4r17 section 7.7.3.6.5
+ *
+ * We depend upon a target_core_mod/ConfigFS provided
+ * /sys/kernel/config/target/core/$HBA/$DEV/wwn/vpd_unit_serial
+ * value in order to return the NAA id.
+ */
+ if (!(dev->se_sub_dev->su_dev_flags & SDF_EMULATED_VPD_UNIT_SERIAL))
+ goto check_t10_vend_desc;
+
+ /* CODE SET == Binary */
+ buf[off++] = 0x1;
+
+ /* Set ASSOCIATION == addressed logical unit: 0)b */
+ buf[off] = 0x00;
+
+ /* Identifier/Designator type == NAA identifier */
+ buf[off++] |= 0x3;
+ off++;
+
+ /* Identifier/Designator length */
+ buf[off++] = 0x10;
+
+ /*
+ * Start NAA IEEE Registered Extended Identifier/Designator
+ */
+ buf[off++] = (0x6 << 4);
+
+ /*
+ * Use OpenFabrics IEEE Company ID: 00 14 05
+ */
+ buf[off++] = 0x01;
+ buf[off++] = 0x40;
+ buf[off] = (0x5 << 4);
+
+ /*
+ * Return ConfigFS Unit Serial Number information for
+ * VENDOR_SPECIFIC_IDENTIFIER and
+ * VENDOR_SPECIFIC_IDENTIFIER_EXTENTION
+ */
+ spc_parse_naa_6h_vendor_specific(dev, &buf[off]);
+
+ len = 20;
+ off = (len + 4);
+
+check_t10_vend_desc:
+ /*
+ * T10 Vendor Identifier Page, see spc4r17 section 7.7.3.4
+ */
+ id_len = 8; /* For Vendor field */
+ prod_len = 4; /* For VPD Header */
+ prod_len += 8; /* For Vendor field */
+ prod_len += strlen(prod);
+ prod_len++; /* For : */
+
+ if (dev->se_sub_dev->su_dev_flags &
+ SDF_EMULATED_VPD_UNIT_SERIAL) {
+ unit_serial_len =
+ strlen(&dev->se_sub_dev->t10_wwn.unit_serial[0]);
+ unit_serial_len++; /* For NULL Terminator */
+
+ id_len += sprintf(&buf[off+12], "%s:%s", prod,
+ &dev->se_sub_dev->t10_wwn.unit_serial[0]);
+ }
+ buf[off] = 0x2; /* ASCII */
+ buf[off+1] = 0x1; /* T10 Vendor ID */
+ buf[off+2] = 0x0;
+ memcpy(&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
+ */
+ 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
+ */
+ buf[off] =
+ (tpg->se_tpg_tfo->get_fabric_proto_ident(tpg) << 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;
+ 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
+ */
+ if (dev->se_sub_dev->t10_alua.alua_type !=
+ SPC3_ALUA_EMULATED)
+ goto check_scsi_name;
+
+ 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->se_tpg_tfo->get_fabric_proto_ident(tpg) << 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 */
+ 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:
+ 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->se_tpg_tfo->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;
+
+ buf[off] =
+ (tpg->se_tpg_tfo->get_fabric_proto_ident(tpg) << 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.
+ */
+ 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 spc_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 spc_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 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->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 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->se_sub_dev->se_dev_attrib.is_nonrot ? 1 : 0;
+
+ return 0;
+}
+
+/* Thin Provisioning VPD */
+static int 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->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 spc_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 = 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 },
+};
+
+/* supported vital product data pages */
+static int 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->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;
+}
+
+static int spc_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 = spc_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;
+}
+
+static int spc_modesense_rwrecovery(unsigned char *p)
+{
+ p[0] = 0x01;
+ p[1] = 0x0a;
+
+ return 12;
+}
+
+static int spc_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 spc_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 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_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 = spc_modesense_rwrecovery(&buf[offset]);
+ break;
+ case 0x08:
+ length = spc_modesense_caching(dev, &buf[offset]);
+ break;
+ case 0x0a:
+ length = spc_modesense_control(dev, &buf[offset]);
+ break;
+ case 0x3f:
+ length = spc_modesense_rwrecovery(&buf[offset]);
+ length += spc_modesense_caching(dev, &buf[offset+length]);
+ length += spc_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)))
+ spc_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))
+ spc_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)))
+ spc_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))
+ spc_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;
+}
+
+static int spc_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;
+}
+
+static int spc_emulate_testunitready(struct se_cmd *cmd)
+{
+ target_complete_cmd(cmd, GOOD);
+ return 0;
+}
+
+int spc_parse_cdb(struct se_cmd *cmd, unsigned int *size)
+{
+ struct se_device *dev = cmd->se_dev;
+ struct se_subsystem_dev *su_dev = dev->se_sub_dev;
unsigned char *cdb = cmd->t_task_cdb;
switch (cdb[0]) {
break;
case MODE_SENSE:
*size = cdb[4];
- if (!passthrough)
- cmd->execute_cmd = target_emulate_modesense;
+ cmd->execute_cmd = spc_emulate_modesense;
break;
case MODE_SENSE_10:
*size = (cdb[7] << 8) + cdb[8];
- if (!passthrough)
- cmd->execute_cmd = target_emulate_modesense;
+ cmd->execute_cmd = spc_emulate_modesense;
break;
case LOG_SELECT:
case LOG_SENSE:
break;
case REQUEST_SENSE:
*size = cdb[4];
- if (!passthrough)
- cmd->execute_cmd = target_emulate_request_sense;
+ cmd->execute_cmd = spc_emulate_request_sense;
break;
case INQUIRY:
*size = (cdb[3] << 8) + cdb[4];
*/
if (cmd->se_dev->dev_task_attr_type == SAM_TASK_ATTR_EMULATED)
cmd->sam_task_attr = MSG_HEAD_TAG;
- if (!passthrough)
- cmd->execute_cmd = target_emulate_inquiry;
+ cmd->execute_cmd = spc_emulate_inquiry;
break;
case SECURITY_PROTOCOL_IN:
case SECURITY_PROTOCOL_OUT:
cmd->sam_task_attr = MSG_HEAD_TAG;
break;
case TEST_UNIT_READY:
- if (!passthrough)
- cmd->execute_cmd = target_emulate_noop;
+ 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 &&
+ su_dev->t10_alua.alua_type == SPC3_ALUA_EMULATED) {
+ cmd->execute_cmd =
+ target_emulate_report_target_port_groups;
+ }
+ *size = get_unaligned_be32(&cdb[6]);
+ } else {
+ /*
+ * GPCMD_SEND_KEY from multi media commands
+ */
+ *size = get_unaligned_be16(&cdb[8]);
+ }
+ break;
+ case MAINTENANCE_OUT:
+ if (dev->transport->get_device_type(dev) != TYPE_ROM) {
+ /*
+ * MAINTENANCE_OUT from SCC-2
+ * Check for emulated MO_SET_TARGET_PGS.
+ */
+ if (cdb[1] == MO_SET_TARGET_PGS &&
+ su_dev->t10_alua.alua_type == SPC3_ALUA_EMULATED) {
+ 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:
pr_warn("TARGET_CORE[%s]: Unsupported SCSI Opcode"
projects / deliverable / linux.git / blobdiff