diff options
Diffstat (limited to 'drivers/target/target_core_spc.c')
| -rw-r--r-- | drivers/target/target_core_spc.c | 574 |
1 files changed, 402 insertions, 172 deletions
diff --git a/drivers/target/target_core_spc.c b/drivers/target/target_core_spc.c index 9229bd9ad61b..84f9e96e8ace 100644 --- a/drivers/target/target_core_spc.c +++ b/drivers/target/target_core_spc.c @@ -1,10 +1,7 @@ /* * SCSI Primary Commands (SPC) parsing and emulation. * - * 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 + * (c) Copyright 2002-2012 RisingTide Systems LLC. * * Nicholas A. Bellinger <nab@kernel.org> * @@ -69,7 +66,8 @@ static void spc_fill_alua_data(struct se_port *port, unsigned char *buf) spin_unlock(&tg_pt_gp_mem->tg_pt_gp_mem_lock); } -static int spc_emulate_inquiry_std(struct se_cmd *cmd, char *buf) +static sense_reason_t +spc_emulate_inquiry_std(struct se_cmd *cmd, char *buf) { struct se_lun *lun = cmd->se_lun; struct se_device *dev = cmd->se_dev; @@ -78,7 +76,7 @@ static int spc_emulate_inquiry_std(struct se_cmd *cmd, char *buf) if (dev->transport->get_device_type(dev) == TYPE_TAPE) buf[1] = 0x80; - buf[2] = dev->transport->get_device_rev(dev); + buf[2] = 0x05; /* SPC-3 */ /* * NORMACA and HISUP = 0, RESPONSE DATA FORMAT = 2 @@ -95,34 +93,32 @@ static int spc_emulate_inquiry_std(struct se_cmd *cmd, char *buf) /* * 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); + 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); + snprintf(&buf[16], 16, "%s", dev->t10_wwn.model); + snprintf(&buf[32], 4, "%s", 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) +static sense_reason_t +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) { + if (dev->dev_flags & DF_EMULATED_VPD_UNIT_SERIAL) { u32 unit_serial_len; - unit_serial_len = strlen(dev->se_sub_dev->t10_wwn.unit_serial); + unit_serial_len = strlen(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 += sprintf(&buf[4], "%s", dev->t10_wwn.unit_serial); len++; /* Extra Byte for NULL Terminator */ buf[3] = len; } @@ -132,7 +128,7 @@ static int spc_emulate_evpd_80(struct se_cmd *cmd, unsigned char *buf) 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]; + unsigned char *p = &dev->t10_wwn.unit_serial[0]; int cnt; bool next = true; @@ -164,7 +160,8 @@ static void spc_parse_naa_6h_vendor_specific(struct se_device *dev, * 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) +static sense_reason_t +spc_emulate_evpd_83(struct se_cmd *cmd, unsigned char *buf) { struct se_device *dev = cmd->se_dev; struct se_lun *lun = cmd->se_lun; @@ -173,7 +170,7 @@ static int spc_emulate_evpd_83(struct se_cmd *cmd, unsigned char *buf) 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]; + unsigned char *prod = &dev->t10_wwn.model[0]; u32 prod_len; u32 unit_serial_len, off = 0; u16 len = 0, id_len; @@ -188,7 +185,7 @@ static int spc_emulate_evpd_83(struct se_cmd *cmd, unsigned char *buf) * /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)) + if (!(dev->dev_flags & DF_EMULATED_VPD_UNIT_SERIAL)) goto check_t10_vend_desc; /* CODE SET == Binary */ @@ -236,14 +233,12 @@ check_t10_vend_desc: 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]); + if (dev->dev_flags & DF_EMULATED_VPD_UNIT_SERIAL) { + unit_serial_len = strlen(&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]); + &dev->t10_wwn.unit_serial[0]); } buf[off] = 0x2; /* ASCII */ buf[off+1] = 0x1; /* T10 Vendor ID */ @@ -298,10 +293,6 @@ check_t10_vend_desc: * 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; @@ -415,20 +406,22 @@ check_scsi_name: } /* Extended INQUIRY Data VPD Page */ -static int spc_emulate_evpd_86(struct se_cmd *cmd, unsigned char *buf) +static sense_reason_t +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) + if (cmd->se_dev->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) +static sense_reason_t +spc_emulate_evpd_b0(struct se_cmd *cmd, unsigned char *buf) { struct se_device *dev = cmd->se_dev; u32 max_sectors; @@ -439,7 +432,7 @@ static int spc_emulate_evpd_b0(struct se_cmd *cmd, unsigned char *buf) * 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) + if (dev->dev_attrib.emulate_tpu || dev->dev_attrib.emulate_tpws) have_tp = 1; buf[0] = dev->transport->get_device_type(dev); @@ -456,62 +449,70 @@ static int spc_emulate_evpd_b0(struct se_cmd *cmd, unsigned char *buf) /* * 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); + max_sectors = min(dev->dev_attrib.fabric_max_sectors, + dev->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]); + put_unaligned_be32(dev->dev_attrib.optimal_sectors, &buf[12]); /* * Exit now if we don't support TP. */ if (!have_tp) - return 0; + goto max_write_same; /* * Set MAXIMUM UNMAP LBA COUNT */ - put_unaligned_be32(dev->se_sub_dev->se_dev_attrib.max_unmap_lba_count, &buf[20]); + put_unaligned_be32(dev->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, + put_unaligned_be32(dev->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]); + put_unaligned_be32(dev->dev_attrib.unmap_granularity, &buf[28]); /* * UNMAP GRANULARITY ALIGNMENT */ - put_unaligned_be32(dev->se_sub_dev->se_dev_attrib.unmap_granularity_alignment, + put_unaligned_be32(dev->dev_attrib.unmap_granularity_alignment, &buf[32]); - if (dev->se_sub_dev->se_dev_attrib.unmap_granularity_alignment != 0) + if (dev->dev_attrib.unmap_granularity_alignment != 0) buf[32] |= 0x80; /* Set the UGAVALID bit */ + /* + * MAXIMUM WRITE SAME LENGTH + */ +max_write_same: + put_unaligned_be64(dev->dev_attrib.max_write_same_len, &buf[36]); + return 0; } /* Block Device Characteristics VPD page */ -static int spc_emulate_evpd_b1(struct se_cmd *cmd, unsigned char *buf) +static sense_reason_t +spc_emulate_evpd_b1(struct se_cmd *cmd, unsigned char *buf) { struct se_device *dev = cmd->se_dev; buf[0] = dev->transport->get_device_type(dev); buf[3] = 0x3c; - buf[5] = dev->se_sub_dev->se_dev_attrib.is_nonrot ? 1 : 0; + buf[5] = dev->dev_attrib.is_nonrot ? 1 : 0; return 0; } /* Thin Provisioning VPD */ -static int spc_emulate_evpd_b2(struct se_cmd *cmd, unsigned char *buf) +static sense_reason_t +spc_emulate_evpd_b2(struct se_cmd *cmd, unsigned char *buf) { struct se_device *dev = cmd->se_dev; @@ -546,7 +547,7 @@ static int spc_emulate_evpd_b2(struct se_cmd *cmd, unsigned char *buf) * 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) + if (dev->dev_attrib.emulate_tpu != 0) buf[5] = 0x80; /* @@ -555,17 +556,18 @@ static int spc_emulate_evpd_b2(struct se_cmd *cmd, unsigned char *buf) * 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) + if (dev->dev_attrib.emulate_tpws != 0) buf[5] |= 0x40; return 0; } -static int spc_emulate_evpd_00(struct se_cmd *cmd, unsigned char *buf); +static sense_reason_t +spc_emulate_evpd_00(struct se_cmd *cmd, unsigned char *buf); static struct { uint8_t page; - int (*emulate)(struct se_cmd *, unsigned char *); + sense_reason_t (*emulate)(struct se_cmd *, unsigned char *); } evpd_handlers[] = { { .page = 0x00, .emulate = spc_emulate_evpd_00 }, { .page = 0x80, .emulate = spc_emulate_evpd_80 }, @@ -577,7 +579,8 @@ static struct { }; /* supported vital product data pages */ -static int spc_emulate_evpd_00(struct se_cmd *cmd, unsigned char *buf) +static sense_reason_t +spc_emulate_evpd_00(struct se_cmd *cmd, unsigned char *buf) { int p; @@ -586,8 +589,7 @@ static int spc_emulate_evpd_00(struct se_cmd *cmd, unsigned char *buf) * 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) { + if (cmd->se_dev->dev_flags & DF_EMULATED_VPD_UNIT_SERIAL) { buf[3] = ARRAY_SIZE(evpd_handlers); for (p = 0; p < ARRAY_SIZE(evpd_handlers); ++p) buf[p + 4] = evpd_handlers[p].page; @@ -596,14 +598,18 @@ static int spc_emulate_evpd_00(struct se_cmd *cmd, unsigned char *buf) return 0; } -static int spc_emulate_inquiry(struct se_cmd *cmd) +static sense_reason_t +spc_emulate_inquiry(struct se_cmd *cmd) { struct se_device *dev = cmd->se_dev; struct se_portal_group *tpg = cmd->se_lun->lun_sep->sep_tpg; unsigned char *rbuf; unsigned char *cdb = cmd->t_task_cdb; unsigned char buf[SE_INQUIRY_BUF]; - int p, ret; + sense_reason_t ret; + int p; + + memset(buf, 0, SE_INQUIRY_BUF); if (dev == tpg->tpg_virt_lun0.lun_se_dev) buf[0] = 0x3f; /* Not connected */ @@ -614,8 +620,7 @@ static int spc_emulate_inquiry(struct se_cmd *cmd) 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; + ret = TCM_INVALID_CDB_FIELD; goto out; } @@ -632,33 +637,43 @@ static int spc_emulate_inquiry(struct se_cmd *cmd) } pr_err("Unknown VPD Code: 0x%02x\n", cdb[2]); - cmd->scsi_sense_reason = TCM_INVALID_CDB_FIELD; - ret = -EINVAL; + ret = TCM_INVALID_CDB_FIELD; out: rbuf = transport_kmap_data_sg(cmd); - if (rbuf) { - memcpy(rbuf, buf, min_t(u32, sizeof(buf), cmd->data_length)); - transport_kunmap_data_sg(cmd); - } + if (!rbuf) + return TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; + + memcpy(rbuf, buf, min_t(u32, sizeof(buf), cmd->data_length)); + transport_kunmap_data_sg(cmd); if (!ret) target_complete_cmd(cmd, GOOD); return ret; } -static int spc_modesense_rwrecovery(unsigned char *p) +static int spc_modesense_rwrecovery(struct se_device *dev, u8 pc, u8 *p) { p[0] = 0x01; p[1] = 0x0a; + /* No changeable values for now */ + if (pc == 1) + goto out; + +out: return 12; } -static int spc_modesense_control(struct se_device *dev, unsigned char *p) +static int spc_modesense_control(struct se_device *dev, u8 pc, u8 *p) { p[0] = 0x0a; p[1] = 0x0a; + + /* No changeable values for now */ + if (pc == 1) + goto out; + p[2] = 2; /* * From spc4r23, 7.4.7 Control mode page @@ -688,7 +703,7 @@ static int spc_modesense_control(struct se_device *dev, unsigned char *p) * 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; + p[3] = (dev->dev_attrib.emulate_rest_reord == 1) ? 0x00 : 0x10; /* * From spc4r17, section 7.4.6 Control mode Page * @@ -718,8 +733,8 @@ static int spc_modesense_control(struct se_device *dev, unsigned char *p) * 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; + p[4] = (dev->dev_attrib.emulate_ua_intlck_ctrl == 2) ? 0x30 : + (dev->dev_attrib.emulate_ua_intlck_ctrl == 1) ? 0x20 : 0x00; /* * From spc4r17, section 7.4.6 Control mode Page * @@ -732,25 +747,56 @@ static int spc_modesense_control(struct se_device *dev, unsigned char *p) * 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[5] = (dev->dev_attrib.emulate_tas) ? 0x40 : 0x00; p[8] = 0xff; p[9] = 0xff; p[11] = 30; +out: return 12; } -static int spc_modesense_caching(struct se_device *dev, unsigned char *p) +static int spc_modesense_caching(struct se_device *dev, u8 pc, u8 *p) { p[0] = 0x08; p[1] = 0x12; - if (dev->se_sub_dev->se_dev_attrib.emulate_write_cache > 0) + + /* No changeable values for now */ + if (pc == 1) + goto out; + + if (dev->dev_attrib.emulate_write_cache > 0) p[2] = 0x04; /* Write Cache Enable */ p[12] = 0x20; /* Disabled Read Ahead */ +out: return 20; } +static int spc_modesense_informational_exceptions(struct se_device *dev, u8 pc, unsigned char *p) +{ + p[0] = 0x1c; + p[1] = 0x0a; + + /* No changeable values for now */ + if (pc == 1) + goto out; + +out: + return 12; +} + +static struct { + uint8_t page; + uint8_t subpage; + int (*emulate)(struct se_device *, u8, unsigned char *); +} modesense_handlers[] = { + { .page = 0x01, .subpage = 0x00, .emulate = spc_modesense_rwrecovery }, + { .page = 0x08, .subpage = 0x00, .emulate = spc_modesense_caching }, + { .page = 0x0a, .subpage = 0x00, .emulate = spc_modesense_control }, + { .page = 0x1c, .subpage = 0x00, .emulate = spc_modesense_informational_exceptions }, +}; + static void spc_modesense_write_protect(unsigned char *buf, int type) { /* @@ -777,82 +823,224 @@ static void spc_modesense_dpofua(unsigned char *buf, int type) } } -static int spc_emulate_modesense(struct se_cmd *cmd) +static int spc_modesense_blockdesc(unsigned char *buf, u64 blocks, u32 block_size) +{ + *buf++ = 8; + put_unaligned_be32(min(blocks, 0xffffffffull), buf); + buf += 4; + put_unaligned_be32(block_size, buf); + return 9; +} + +static int spc_modesense_long_blockdesc(unsigned char *buf, u64 blocks, u32 block_size) +{ + if (blocks <= 0xffffffff) + return spc_modesense_blockdesc(buf + 3, blocks, block_size) + 3; + + *buf++ = 1; /* LONGLBA */ + buf += 2; + *buf++ = 16; + put_unaligned_be64(blocks, buf); + buf += 12; + put_unaligned_be32(block_size, buf); + + return 17; +} + +static sense_reason_t spc_emulate_modesense(struct se_cmd *cmd) { struct se_device *dev = cmd->se_dev; char *cdb = cmd->t_task_cdb; - unsigned char *rbuf; + unsigned char *buf, *map_buf; int type = dev->transport->get_device_type(dev); int ten = (cmd->t_task_cdb[0] == MODE_SENSE_10); - u32 offset = ten ? 8 : 4; + bool dbd = !!(cdb[1] & 0x08); + bool llba = ten ? !!(cdb[1] & 0x10) : false; + u8 pc = cdb[2] >> 6; + u8 page = cdb[2] & 0x3f; + u8 subpage = cdb[3]; int length = 0; - unsigned char buf[SE_MODE_PAGE_BUF]; - - memset(buf, 0, SE_MODE_PAGE_BUF); + int ret; + int i; - 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; + map_buf = transport_kmap_data_sg(cmd); + if (!map_buf) + return TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; + /* + * 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_MODE_PAGE_BUF && + (cmd->se_cmd_flags & SCF_PASSTHROUGH_SG_TO_MEM_NOALLOC)) { + buf = kzalloc(SE_MODE_PAGE_BUF, GFP_KERNEL); + if (!buf) { + transport_kunmap_data_sg(cmd); + return TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; + } + } else { + buf = map_buf; } - offset += length; - - if (ten) { - offset -= 2; - buf[0] = (offset >> 8) & 0xff; - buf[1] = offset & 0xff; - offset += 2; - - 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); + /* + * Skip over MODE DATA LENGTH + MEDIUM TYPE fields to byte 3 for + * MODE_SENSE_10 and byte 2 for MODE_SENSE (6). + */ + length = ten ? 3 : 2; + + /* DEVICE-SPECIFIC PARAMETER */ + if ((cmd->se_lun->lun_access & TRANSPORT_LUNFLAGS_READ_ONLY) || + (cmd->se_deve && + (cmd->se_deve->lun_flags & TRANSPORT_LUNFLAGS_READ_ONLY))) + spc_modesense_write_protect(&buf[length], type); + + if ((dev->dev_attrib.emulate_write_cache > 0) && + (dev->dev_attrib.emulate_fua_write > 0)) + spc_modesense_dpofua(&buf[length], type); + + ++length; + + /* BLOCK DESCRIPTOR */ + + /* + * For now we only include a block descriptor for disk (SBC) + * devices; other command sets use a slightly different format. + */ + if (!dbd && type == TYPE_DISK) { + u64 blocks = dev->transport->get_blocks(dev); + u32 block_size = dev->dev_attrib.block_size; + + if (ten) { + if (llba) { + length += spc_modesense_long_blockdesc(&buf[length], + blocks, block_size); + } else { + length += 3; + length += spc_modesense_blockdesc(&buf[length], + blocks, block_size); + } + } else { + length += spc_modesense_blockdesc(&buf[length], blocks, + block_size); + } } else { - offset -= 1; - buf[0] = offset & 0xff; - offset += 1; - - 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 (ten) + length += 4; + else + length += 1; } - rbuf = transport_kmap_data_sg(cmd); - if (rbuf) { - memcpy(rbuf, buf, min(offset, cmd->data_length)); - transport_kunmap_data_sg(cmd); + if (page == 0x3f) { + if (subpage != 0x00 && subpage != 0xff) { + pr_warn("MODE_SENSE: Invalid subpage code: 0x%02x\n", subpage); + kfree(buf); + transport_kunmap_data_sg(cmd); + return TCM_INVALID_CDB_FIELD; + } + + for (i = 0; i < ARRAY_SIZE(modesense_handlers); ++i) { + /* + * Tricky way to say all subpage 00h for + * subpage==0, all subpages for subpage==0xff + * (and we just checked above that those are + * the only two possibilities). + */ + if ((modesense_handlers[i].subpage & ~subpage) == 0) { + ret = modesense_handlers[i].emulate(dev, pc, &buf[length]); + if (!ten && length + ret >= 255) + break; + length += ret; + } + } + + goto set_length; + } + + for (i = 0; i < ARRAY_SIZE(modesense_handlers); ++i) + if (modesense_handlers[i].page == page && + modesense_handlers[i].subpage == subpage) { + length += modesense_handlers[i].emulate(dev, pc, &buf[length]); + goto set_length; + } + + /* + * We don't intend to implement: + * - obsolete page 03h "format parameters" (checked by Solaris) + */ + if (page != 0x03) + pr_err("MODE SENSE: unimplemented page/subpage: 0x%02x/0x%02x\n", + page, subpage); + + transport_kunmap_data_sg(cmd); + return TCM_UNKNOWN_MODE_PAGE; + +set_length: + if (ten) + put_unaligned_be16(length - 2, buf); + else + buf[0] = length - 1; + + if (buf != map_buf) { + memcpy(map_buf, buf, cmd->data_length); + kfree(buf); } + transport_kunmap_data_sg(cmd); target_complete_cmd(cmd, GOOD); return 0; } -static int spc_emulate_request_sense(struct se_cmd *cmd) +static sense_reason_t spc_emulate_modeselect(struct se_cmd *cmd) +{ + struct se_device *dev = cmd->se_dev; + char *cdb = cmd->t_task_cdb; + bool ten = cdb[0] == MODE_SELECT_10; + int off = ten ? 8 : 4; + bool pf = !!(cdb[1] & 0x10); + u8 page, subpage; + unsigned char *buf; + unsigned char tbuf[SE_MODE_PAGE_BUF]; + int length; + int ret = 0; + int i; + + buf = transport_kmap_data_sg(cmd); + if (!buf) + return TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; + + if (!pf) { + ret = TCM_INVALID_CDB_FIELD; + goto out; + } + + page = buf[off] & 0x3f; + subpage = buf[off] & 0x40 ? buf[off + 1] : 0; + + for (i = 0; i < ARRAY_SIZE(modesense_handlers); ++i) + if (modesense_handlers[i].page == page && + modesense_handlers[i].subpage == subpage) { + memset(tbuf, 0, SE_MODE_PAGE_BUF); + length = modesense_handlers[i].emulate(dev, 0, tbuf); + goto check_contents; + } + + ret = TCM_UNKNOWN_MODE_PAGE; + goto out; + +check_contents: + if (memcmp(buf + off, tbuf, length)) + ret = TCM_INVALID_PARAMETER_LIST; + +out: + transport_kunmap_data_sg(cmd); + + if (!ret) + target_complete_cmd(cmd, GOOD); + return ret; +} + +static sense_reason_t spc_emulate_request_sense(struct se_cmd *cmd) { unsigned char *cdb = cmd->t_task_cdb; unsigned char *rbuf; @@ -864,19 +1052,14 @@ static int spc_emulate_request_sense(struct se_cmd *cmd) if (cdb[1] & 0x01) { pr_err("REQUEST_SENSE description emulation not" " supported\n"); - cmd->scsi_sense_reason = TCM_INVALID_CDB_FIELD; - return -ENOSYS; + return TCM_INVALID_CDB_FIELD; } rbuf = transport_kmap_data_sg(cmd); - if (cmd->scsi_sense_reason != 0) { - /* - * Out of memory. We will fail with CHECK CONDITION, so - * we must not clear the unit attention condition. - */ - target_complete_cmd(cmd, CHECK_CONDITION); - return 0; - } else if (!core_scsi3_ua_clear_for_request_sense(cmd, &ua_asc, &ua_ascq)) { + if (!rbuf) + return TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; + + if (!core_scsi3_ua_clear_for_request_sense(cmd, &ua_asc, &ua_ascq)) { /* * CURRENT ERROR, UNIT ATTENTION */ @@ -903,33 +1086,97 @@ static int spc_emulate_request_sense(struct se_cmd *cmd) buf[7] = 0x0A; } - if (rbuf) { - memcpy(rbuf, buf, min_t(u32, sizeof(buf), cmd->data_length)); - transport_kunmap_data_sg(cmd); + memcpy(rbuf, buf, min_t(u32, sizeof(buf), cmd->data_length)); + transport_kunmap_data_sg(cmd); + + target_complete_cmd(cmd, GOOD); + return 0; +} + +sense_reason_t spc_emulate_report_luns(struct se_cmd *cmd) +{ + struct se_dev_entry *deve; + struct se_session *sess = cmd->se_sess; + unsigned char *buf; + u32 lun_count = 0, offset = 8, i; + + if (cmd->data_length < 16) { + pr_warn("REPORT LUNS allocation length %u too small\n", + cmd->data_length); + return TCM_INVALID_CDB_FIELD; + } + + buf = transport_kmap_data_sg(cmd); + if (!buf) + return TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; + + /* + * If no struct se_session pointer is present, this struct se_cmd is + * coming via a target_core_mod PASSTHROUGH op, and not through + * a $FABRIC_MOD. In that case, report LUN=0 only. + */ + if (!sess) { + int_to_scsilun(0, (struct scsi_lun *)&buf[offset]); + lun_count = 1; + goto done; + } + + spin_lock_irq(&sess->se_node_acl->device_list_lock); + for (i = 0; i < TRANSPORT_MAX_LUNS_PER_TPG; i++) { + deve = sess->se_node_acl->device_list[i]; + if (!(deve->lun_flags & TRANSPORT_LUNFLAGS_INITIATOR_ACCESS)) + continue; + /* + * We determine the correct LUN LIST LENGTH even once we + * have reached the initial allocation length. + * See SPC2-R20 7.19. + */ + lun_count++; + if ((offset + 8) > cmd->data_length) + continue; + + int_to_scsilun(deve->mapped_lun, (struct scsi_lun *)&buf[offset]); + offset += 8; } + spin_unlock_irq(&sess->se_node_acl->device_list_lock); + + /* + * See SPC3 r07, page 159. + */ +done: + lun_count *= 8; + buf[0] = ((lun_count >> 24) & 0xff); + buf[1] = ((lun_count >> 16) & 0xff); + buf[2] = ((lun_count >> 8) & 0xff); + buf[3] = (lun_count & 0xff); + transport_kunmap_data_sg(cmd); target_complete_cmd(cmd, GOOD); return 0; } +EXPORT_SYMBOL(spc_emulate_report_luns); -static int spc_emulate_testunitready(struct se_cmd *cmd) +static sense_reason_t +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) +sense_reason_t +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]) { case MODE_SELECT: *size = cdb[4]; + cmd->execute_cmd = spc_emulate_modeselect; break; case MODE_SELECT_10: *size = (cdb[7] << 8) + cdb[8]; + cmd->execute_cmd = spc_emulate_modeselect; break; case MODE_SENSE: *size = cdb[4]; @@ -944,14 +1191,12 @@ int spc_parse_cdb(struct se_cmd *cmd, unsigned int *size) *size = (cdb[7] << 8) + cdb[8]; break; case PERSISTENT_RESERVE_IN: - if (su_dev->t10_pr.res_type == SPC3_PERSISTENT_RESERVATIONS) - cmd->execute_cmd = target_scsi3_emulate_pr_in; *size = (cdb[7] << 8) + cdb[8]; + cmd->execute_cmd = target_scsi3_emulate_pr_in; break; case PERSISTENT_RESERVE_OUT: - if (su_dev->t10_pr.res_type == SPC3_PERSISTENT_RESERVATIONS) - cmd->execute_cmd = target_scsi3_emulate_pr_out; *size = (cdb[7] << 8) + cdb[8]; + cmd->execute_cmd = target_scsi3_emulate_pr_out; break; case RELEASE: case RELEASE_10: @@ -960,8 +1205,7 @@ int spc_parse_cdb(struct se_cmd *cmd, unsigned int *size) else *size = cmd->data_length; - if (su_dev->t10_pr.res_type != SPC_PASSTHROUGH) - cmd->execute_cmd = target_scsi2_reservation_release; + cmd->execute_cmd = target_scsi2_reservation_release; break; case RESERVE: case RESERVE_10: @@ -974,15 +1218,7 @@ int spc_parse_cdb(struct se_cmd *cmd, unsigned int *size) else *size = cmd->data_length; - /* - * Setup the legacy emulated handler for SPC-2 and - * >= SPC-3 compatible reservation handling (CRH=1) - * Otherwise, we assume the underlying SCSI logic is - * is running in SPC_PASSTHROUGH, and wants reservations - * emulation disabled. - */ - if (su_dev->t10_pr.res_type != SPC_PASSTHROUGH) - cmd->execute_cmd = target_scsi2_reservation_reserve; + cmd->execute_cmd = target_scsi2_reservation_reserve; break; case REQUEST_SENSE: *size = cdb[4]; @@ -995,8 +1231,7 @@ int spc_parse_cdb(struct se_cmd *cmd, unsigned int *size) * Do implict HEAD_OF_QUEUE processing for INQUIRY. * See spc4r17 section 5.3 */ - if (cmd->se_dev->dev_task_attr_type == SAM_TASK_ATTR_EMULATED) - cmd->sam_task_attr = MSG_HEAD_TAG; + cmd->sam_task_attr = MSG_HEAD_TAG; cmd->execute_cmd = spc_emulate_inquiry; break; case SECURITY_PROTOCOL_IN: @@ -1018,14 +1253,13 @@ int spc_parse_cdb(struct se_cmd *cmd, unsigned int *size) *size = (cdb[6] << 16) + (cdb[7] << 8) + cdb[8]; break; case REPORT_LUNS: - cmd->execute_cmd = target_report_luns; + cmd->execute_cmd = spc_emulate_report_luns; *size = (cdb[6] << 24) | (cdb[7] << 16) | (cdb[8] << 8) | cdb[9]; /* * Do implict HEAD_OF_QUEUE processing for REPORT_LUNS * See spc4r17 section 5.3 */ - if (cmd->se_dev->dev_task_attr_type == SAM_TASK_ATTR_EMULATED) - cmd->sam_task_attr = MSG_HEAD_TAG; + cmd->sam_task_attr = MSG_HEAD_TAG; break; case TEST_UNIT_READY: cmd->execute_cmd = spc_emulate_testunitready; @@ -1037,8 +1271,7 @@ int spc_parse_cdb(struct se_cmd *cmd, unsigned int *size) * 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) { + if ((cdb[1] & 0x1f) == MI_REPORT_TARGET_PGS) { cmd->execute_cmd = target_emulate_report_target_port_groups; } @@ -1056,8 +1289,7 @@ int spc_parse_cdb(struct se_cmd *cmd, unsigned int *size) * 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) { + if (cdb[1] == MO_SET_TARGET_PGS) { cmd->execute_cmd = target_emulate_set_target_port_groups; } @@ -1073,9 +1305,7 @@ int spc_parse_cdb(struct se_cmd *cmd, unsigned int *size) pr_warn("TARGET_CORE[%s]: Unsupported SCSI Opcode" " 0x%02x, sending CHECK_CONDITION.\n", cmd->se_tfo->get_fabric_name(), cdb[0]); - cmd->se_cmd_flags |= SCF_SCSI_CDB_EXCEPTION; - cmd->scsi_sense_reason = TCM_UNSUPPORTED_SCSI_OPCODE; - return -EINVAL; + return TCM_UNSUPPORTED_SCSI_OPCODE; } return 0; |