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scsi_bsg_iscsi.h
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1 /*
2  * iSCSI Transport BSG Interface
3  *
4  * Copyright (C) 2009 James Smart, Emulex Corporation
5  *
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.
10  *
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.
15  *
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
19  *
20  */
21 
22 #ifndef SCSI_BSG_ISCSI_H
23 #define SCSI_BSG_ISCSI_H
24 
25 /*
26  * This file intended to be included by both kernel and user space
27  */
28 
29 #include <scsi/scsi.h>
30 
31 /*
32  * iSCSI Transport SGIO v4 BSG Message Support
33  */
34 
35 /* Default BSG request timeout (in seconds) */
36 #define ISCSI_DEFAULT_BSG_TIMEOUT (10 * HZ)
37 
38 
39 /*
40  * Request Message Codes supported by the iSCSI Transport
41  */
42 
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 */
46 
47 /* iscsi host Message Codes */
48 #define ISCSI_BSG_HST_VENDOR (ISCSI_BSG_HST_MASK | 0x000000FF)
49 
50 
51 /*
52  * iSCSI Host Messages
53  */
54 
55 /* ISCSI_BSG_HST_VENDOR : */
56 
57 /* Request:
58  * Note: When specifying vendor_id, be sure to read the Vendor Type and ID
59  * formatting requirements specified in scsi_netlink.h
60  */
62  /*
63  * Identifies the vendor that the message is formatted for. This
64  * should be the recipient of the message.
65  */
67 
68  /* start of vendor command area */
70 };
71 
72 /* Response:
73  */
75  /* start of vendor response area */
77 };
78 
79 
80 /* request (CDB) structure of the sg_io_v4 */
83  union {
85  } rqst_data;
86 } __attribute__((packed));
87 
88 
89 /* response (request sense data) structure of the sg_io_v4 */
91  /*
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.
98  */
100 
101  /* If there was reply_payload, how much was recevied ? */
103 
104  union {
106  } reply_data;
107 };
108 
109 
110 #endif /* SCSI_BSG_ISCSI_H */