2 * iSCSI Transport BSG Interface
4 * Copyright (C) 2009 James Smart, Emulex Corporation
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License as published by
8 * the Free Software Foundation; either version 2 of the License, or
9 * (at your option) any later version.
11 * This program is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 * GNU General Public License for more details.
16 * You should have received a copy of the GNU General Public License
17 * along with this program; if not, write to the Free Software
18 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
22 #ifndef SCSI_BSG_ISCSI_H
23 #define SCSI_BSG_ISCSI_H
26 * This file intended to be included by both kernel and user space
29 #include <scsi/scsi.h>
32 * iSCSI Transport SGIO v4 BSG Message Support
35 /* Default BSG request timeout (in seconds) */
36 #define ISCSI_DEFAULT_BSG_TIMEOUT (10 * HZ)
40 * Request Message Codes supported by the iSCSI Transport
43 /* define the class masks for the message codes */
44 #define ISCSI_BSG_CLS_MASK 0xF0000000 /* find object class */
45 #define ISCSI_BSG_HST_MASK 0x80000000 /* iscsi host class */
47 /* iscsi host Message Codes */
48 #define ISCSI_BSG_HST_VENDOR (ISCSI_BSG_HST_MASK | 0x000000FF)
55 /* ISCSI_BSG_HST_VENDOR : */
58 * Note: When specifying vendor_id, be sure to read the Vendor Type and ID
59 * formatting requirements specified in scsi_netlink.h
61 struct iscsi_bsg_host_vendor {
63 * Identifies the vendor that the message is formatted for. This
64 * should be the recipient of the message.
68 /* start of vendor command area */
69 uint32_t vendor_cmd[0];
74 struct iscsi_bsg_host_vendor_reply {
75 /* start of vendor response area */
76 uint32_t vendor_rsp[0];
80 /* request (CDB) structure of the sg_io_v4 */
81 struct iscsi_bsg_request {
84 struct iscsi_bsg_host_vendor h_vendor;
86 } __attribute__((packed));
89 /* response (request sense data) structure of the sg_io_v4 */
90 struct iscsi_bsg_reply {
92 * The completion result. Result exists in two forms:
93 * if negative, it is an -Exxx system errno value. There will
94 * be no further reply information supplied.
95 * else, it's the 4-byte scsi error result, with driver, host,
96 * msg and status fields. The per-msgcode reply structure
97 * will contain valid data.
101 /* If there was reply_payload, how much was recevied ? */
102 uint32_t reply_payload_rcv_len;
105 struct iscsi_bsg_host_vendor_reply vendor_reply;
110 #endif /* SCSI_BSG_ISCSI_H */