Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1754277Ab2BKTpR (ORCPT ); Sat, 11 Feb 2012 14:45:17 -0500 Received: from kamaji.grokhost.net ([87.117.218.43]:52765 "EHLO kamaji.grokhost.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751002Ab2BKToW (ORCPT ); Sat, 11 Feb 2012 14:44:22 -0500 From: Chris Boot To: linux1394-devel@lists.sourceforge.net, target-devel@vger.kernel.org Cc: linux-kernel@vger.kernel.org, agrover@redhat.com, clemens@ladisch.de, nab@linux-iscsi.org, stefanr@s5r6.in-berlin.de, Chris Boot Subject: [PATCH 07/13] firewire-sbp-target: Add sbp_proto.{c,h} Date: Sat, 11 Feb 2012 19:44:06 +0000 Message-Id: <1328989452-20921-8-git-send-email-bootc@bootc.net> X-Mailer: git-send-email 1.7.9 In-Reply-To: <1328989452-20921-1-git-send-email-bootc@bootc.net> References: <4E4BD560.4010806@bootc.net> <1328989452-20921-1-git-send-email-bootc@bootc.net> Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 4983 Lines: 160 These are functions to generate TransportID identifiers as per SPC-4 revision 17. Signed-off-by: Chris Boot Cc: Andy Grover Cc: Clemens Ladisch Cc: Nicholas A. Bellinger Cc: Stefan Richter --- drivers/target/sbp/sbp_proto.c | 113 ++++++++++++++++++++++++++++++++++++++++ drivers/target/sbp/sbp_proto.h | 12 ++++ 2 files changed, 125 insertions(+), 0 deletions(-) create mode 100644 drivers/target/sbp/sbp_proto.c create mode 100644 drivers/target/sbp/sbp_proto.h diff --git a/drivers/target/sbp/sbp_proto.c b/drivers/target/sbp/sbp_proto.c new file mode 100644 index 0000000..5744b5c --- /dev/null +++ b/drivers/target/sbp/sbp_proto.c @@ -0,0 +1,113 @@ +/* + * SBP2 target driver (SCSI over IEEE1394 in target mode) + * + * Copyright (C) 2011 Chris Boot + * + * 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. + */ + +#define KMSG_COMPONENT "sbp_target" +#define pr_fmt(fmt) KMSG_COMPONENT ": " fmt + +#include +#include +#include +#include + +#include "sbp_proto.h" + +/* + * Handlers for Serial Attached SCSI (SBP) + */ +u8 sbp_get_fabric_proto_ident(struct se_portal_group *se_tpg) +{ + /* + * Return a IEEE 1394 SCSI Protocol identifier for loopback operations + * This is defined in section 7.5.1 Table 362 in spc4r17 + */ + return SCSI_PROTOCOL_SBP; +} +EXPORT_SYMBOL(sbp_get_fabric_proto_ident); + +u32 sbp_get_pr_transport_id( + struct se_portal_group *se_tpg, + struct se_node_acl *se_nacl, + struct t10_pr_registration *pr_reg, + int *format_code, + unsigned char *buf) +{ + int ret; + + /* + * Set PROTOCOL IDENTIFIER to 3h for SBP + */ + buf[0] = SCSI_PROTOCOL_SBP; + /* + * From spc4r17, 7.5.4.4 TransportID for initiator ports using SCSI + * over IEEE 1394 + */ + ret = hex2bin(&buf[8], se_nacl->initiatorname, 8); + if (ret < 0) + pr_debug("sbp transport_id: invalid hex string\n"); + + /* + * The IEEE 1394 Transport ID is a hardcoded 24-byte length + */ + return 24; +} +EXPORT_SYMBOL(sbp_get_pr_transport_id); + +u32 sbp_get_pr_transport_id_len( + struct se_portal_group *se_tpg, + struct se_node_acl *se_nacl, + struct t10_pr_registration *pr_reg, + int *format_code) +{ + *format_code = 0; + /* + * From spc4r17, 7.5.4.4 TransportID for initiator ports using SCSI + * over IEEE 1394 + * + * The SBP Transport ID is a hardcoded 24-byte length + */ + return 24; +} +EXPORT_SYMBOL(sbp_get_pr_transport_id_len); + +/* + * Used for handling SCSI fabric dependent TransportIDs in SPC-3 and above + * Persistent Reservation SPEC_I_PT=1 and PROUT REGISTER_AND_MOVE operations. + */ +char *sbp_parse_pr_out_transport_id( + struct se_portal_group *se_tpg, + const char *buf, + u32 *out_tid_len, + char **port_nexus_ptr) +{ + /* + * Assume the FORMAT CODE 00b from spc4r17, 7.5.4.4 TransportID + * for initiator ports using SCSI over SBP Serial SCSI Protocol + * + * The TransportID for a IEEE 1394 Initiator Port is of fixed size of + * 24 bytes, and IEEE 1394 does not contain a I_T nexus identifier, + * so we return the **port_nexus_ptr set to NULL. + */ + *port_nexus_ptr = NULL; + *out_tid_len = 24; + + return (char *)&buf[8]; +} +EXPORT_SYMBOL(sbp_parse_pr_out_transport_id); + diff --git a/drivers/target/sbp/sbp_proto.h b/drivers/target/sbp/sbp_proto.h new file mode 100644 index 0000000..1bd3e16 --- /dev/null +++ b/drivers/target/sbp/sbp_proto.h @@ -0,0 +1,12 @@ + +u8 sbp_get_fabric_proto_ident(struct se_portal_group *se_tpg); +u32 sbp_get_pr_transport_id(struct se_portal_group *se_tpg, + struct se_node_acl *se_nacl, struct t10_pr_registration *pr_reg, + int *format_code, unsigned char *buf); +u32 sbp_get_pr_transport_id_len( + struct se_portal_group *se_tpg, struct se_node_acl *se_nacl, + struct t10_pr_registration *pr_reg, int *format_code); +char *sbp_parse_pr_out_transport_id( + struct se_portal_group *se_tpg, const char *buf, + u32 *out_tid_len, char **port_nexus_ptr); + -- 1.7.9 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/