summaryrefslogblamecommitdiff
path: root/include/scsi/scsi_bsg_iscsi.h
blob: 9b1f0f424a793ad2fbe21aa2e58cec1eaaa411a7 (plain) (tree) 
1a59d1b8e05e ^

90eeb01a038e ^




90eeb01a038e ^

















































5febf6d6ae4d ^

90eeb01a038e ^































40d6b939e4df ^

90eeb01a038e ^









1

2
3
4
5

6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54

55

56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86

87

88
89
90
91
92
93
94
95
96

                                               



                                                        
















































                                                                          
                              






























                                                                      
                                                                 








                                                                     
/* SPDX-License-Identifier: GPL-2.0-or-later */
/*
 *  iSCSI Transport BSG Interface
 *
 *  Copyright (C) 2009   James Smart, Emulex Corporation
 */

#ifndef SCSI_BSG_ISCSI_H
#define SCSI_BSG_ISCSI_H

/*
 * This file intended to be included by both kernel and user space
 */

#include <scsi/scsi.h>

/*
 * iSCSI Transport SGIO v4 BSG Message Support
 */

/* Default BSG request timeout (in seconds) */
#define ISCSI_DEFAULT_BSG_TIMEOUT      (10 * HZ)


/*
 * Request Message Codes supported by the iSCSI Transport
 */

/* define the class masks for the message codes */
#define ISCSI_BSG_CLS_MASK     0xF0000000      /* find object class */
#define ISCSI_BSG_HST_MASK     0x80000000      /* iscsi host class */

/* iscsi host Message Codes */
#define ISCSI_BSG_HST_VENDOR           (ISCSI_BSG_HST_MASK | 0x000000FF)


/*
 * iSCSI Host Messages
 */

/* ISCSI_BSG_HST_VENDOR : */

/* Request:
 * Note: When specifying vendor_id, be sure to read the Vendor Type and ID
 *   formatting requirements specified in scsi_netlink.h
 */
struct iscsi_bsg_host_vendor {
	/*
	 * Identifies the vendor that the message is formatted for. This
	 * should be the recipient of the message.
	 */
	uint64_t vendor_id;

	/* start of vendor command area */
	uint32_t vendor_cmd[];
};

/* Response:
 */
struct iscsi_bsg_host_vendor_reply {
	/* start of vendor response area */
	uint32_t vendor_rsp[0];
};


/* request (CDB) structure of the sg_io_v4 */
struct iscsi_bsg_request {
	uint32_t msgcode;
	union {
		struct iscsi_bsg_host_vendor    h_vendor;
	} rqst_data;
} __attribute__((packed));


/* response (request sense data) structure of the sg_io_v4 */
struct iscsi_bsg_reply {
	/*
	 * The completion result. Result exists in two forms:
	 * if negative, it is an -Exxx system errno value. There will
	 * be no further reply information supplied.
	 * else, it's the 4-byte scsi error result, with driver, host,
	 * msg and status fields. The per-msgcode reply structure
	 * will contain valid data.
	 */
	uint32_t result;

	/* If there was reply_payload, how much was received ? */
	uint32_t reply_payload_rcv_len;

	union {
		struct iscsi_bsg_host_vendor_reply      vendor_reply;
	} reply_data;
};


#endif /* SCSI_BSG_ISCSI_H */