From fbfe858fea2a45df6339eb03dd1715b51f1bdc92 Mon Sep 17 00:00:00 2001 From: Hannes Reinecke Date: Tue, 17 Dec 2013 09:18:48 +0100 Subject: target_core_spc: Include target device descriptor in VPD page 83 We should be including a descriptor referring to the target device to allow identification of different TCM instances. (nab: Bump SE_INQUIRY_BUF to 1024 bytes to handle 2x 256 byte SCSI names) Signed-off-by: Hannes Reinecke Signed-off-by: Nicholas Bellinger --- drivers/target/target_core_spc.c | 43 +++++++++++++++++++++++++++++++++++++++- 1 file changed, 42 insertions(+), 1 deletion(-) (limited to 'drivers/target') diff --git a/drivers/target/target_core_spc.c b/drivers/target/target_core_spc.c index 603c41105aa7..39054d9029f3 100644 --- a/drivers/target/target_core_spc.c +++ b/drivers/target/target_core_spc.c @@ -267,7 +267,7 @@ check_t10_vend_desc: port = lun->lun_sep; if (port) { struct t10_alua_lu_gp *lu_gp; - u32 padding, scsi_name_len; + u32 padding, scsi_name_len, scsi_target_len; u16 lu_gp_id = 0; u16 tg_pt_gp_id = 0; u16 tpgt; @@ -402,6 +402,47 @@ check_scsi_name: off += scsi_name_len; /* Header size + Designation descriptor */ len += (scsi_name_len + 4); + + /* + * Target device designator + */ + 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 device: 10b */ + buf[off] |= 0x20; + /* DESIGNATOR TYPE == SCSI name string */ + buf[off++] |= 0x8; + off += 2; /* Skip over Reserved and length */ + /* + * SCSI name string identifer containing, $FABRIC_MOD + * dependent information. For LIO-Target and iSCSI + * Target Port, this means "" in + * UTF-8 encoding. + */ + scsi_target_len = sprintf(&buf[off], "%s", + tpg->se_tpg_tfo->tpg_get_wwn(tpg)); + scsi_target_len += 1 /* Include NULL terminator */; + /* + * The null-terminated, null-padded (see 4.4.2) SCSI + * NAME STRING field contains a UTF-8 format string. + * The number of bytes in the SCSI NAME STRING field + * (i.e., the value in the DESIGNATOR LENGTH field) + * shall be no larger than 256 and shall be a multiple + * of four. + */ + padding = ((-scsi_target_len) & 3); + if (padding) + scsi_target_len += padding; + if (scsi_name_len > 256) + scsi_name_len = 256; + + buf[off-1] = scsi_target_len; + off += scsi_target_len; + + /* Header size + Designation descriptor */ + len += (scsi_target_len + 4); } buf[2] = ((len >> 8) & 0xff); buf[3] = (len & 0xff); /* Page Length for VPD 0x83 */ -- cgit v1.2.3