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-rw-r--r--include/scsi/scsi_transport_iscsi.h202
1 files changed, 55 insertions, 147 deletions
diff --git a/include/scsi/scsi_transport_iscsi.h b/include/scsi/scsi_transport_iscsi.h
index 1b26a6c0aa2a..f25041c386ec 100644
--- a/include/scsi/scsi_transport_iscsi.h
+++ b/include/scsi/scsi_transport_iscsi.h
@@ -1,8 +1,10 @@
1/* 1/*
2 * iSCSI transport class definitions 2 * iSCSI transport class definitions
3 * 3 *
4 * Copyright (C) IBM Corporation, 2004 4 * Copyright (C) IBM Corporation, 2004
5 * Copyright (C) Mike Christie, 2004 5 * Copyright (C) Mike Christie, 2004 - 2005
6 * Copyright (C) Dmitry Yusupov, 2004 - 2005
7 * Copyright (C) Alex Aizman, 2004 - 2005
6 * 8 *
7 * This program is free software; you can redistribute it and/or modify 9 * This program is free software; you can redistribute it and/or modify
8 * it under the terms of the GNU General Public License as published by 10 * it under the terms of the GNU General Public License as published by
@@ -21,158 +23,64 @@
21#ifndef SCSI_TRANSPORT_ISCSI_H 23#ifndef SCSI_TRANSPORT_ISCSI_H
22#define SCSI_TRANSPORT_ISCSI_H 24#define SCSI_TRANSPORT_ISCSI_H
23 25
24#include <linux/config.h> 26#include <scsi/iscsi_if.h>
25#include <linux/in6.h>
26#include <linux/in.h>
27
28struct scsi_transport_template;
29 27
30struct iscsi_class_session { 28/**
31 uint8_t isid[6]; 29 * struct iscsi_transport - iSCSI Transport template
32 uint16_t tsih; 30 *
33 int header_digest; /* 1 CRC32, 0 None */ 31 * @name: transport name
34 int data_digest; /* 1 CRC32, 0 None */ 32 * @caps: iSCSI Data-Path capabilities
35 uint16_t tpgt; 33 * @create_session: create new iSCSI session object
36 union { 34 * @destroy_session: destroy existing iSCSI session object
37 struct in6_addr sin6_addr; 35 * @create_conn: create new iSCSI connection
38 struct in_addr sin_addr; 36 * @bind_conn: associate this connection with existing iSCSI session
39 } u; 37 * and specified transport descriptor
40 sa_family_t addr_type; /* must be AF_INET or AF_INET6 */ 38 * @destroy_conn: destroy inactive iSCSI connection
41 uint16_t port; /* must be in network byte order */ 39 * @set_param: set iSCSI Data-Path operational parameter
42 int initial_r2t; /* 1 Yes, 0 No */ 40 * @start_conn: set connection to be operational
43 int immediate_data; /* 1 Yes, 0 No */ 41 * @stop_conn: suspend/recover/terminate connection
44 uint32_t max_recv_data_segment_len; 42 * @send_pdu: send iSCSI PDU, Login, Logout, NOP-Out, Reject, Text.
45 uint32_t max_burst_len; 43 *
46 uint32_t first_burst_len; 44 * Template API provided by iSCSI Transport
47 uint16_t def_time2wait; 45 */
48 uint16_t def_time2retain; 46struct iscsi_transport {
49 uint16_t max_outstanding_r2t; 47 struct module *owner;
50 int data_pdu_in_order; /* 1 Yes, 0 No */ 48 char *name;
51 int data_sequence_in_order; /* 1 Yes, 0 No */ 49 unsigned int caps;
52 int erl; 50 struct scsi_host_template *host_template;
51 int hostdata_size;
52 int max_lun;
53 unsigned int max_conn;
54 unsigned int max_cmd_len;
55 iscsi_sessionh_t (*create_session) (uint32_t initial_cmdsn,
56 struct Scsi_Host *shost);
57 void (*destroy_session) (iscsi_sessionh_t session);
58 iscsi_connh_t (*create_conn) (iscsi_sessionh_t session, uint32_t cid);
59 int (*bind_conn) (iscsi_sessionh_t session, iscsi_connh_t conn,
60 uint32_t transport_fd, int is_leading);
61 int (*start_conn) (iscsi_connh_t conn);
62 void (*stop_conn) (iscsi_connh_t conn, int flag);
63 void (*destroy_conn) (iscsi_connh_t conn);
64 int (*set_param) (iscsi_connh_t conn, enum iscsi_param param,
65 uint32_t value);
66 int (*get_param) (iscsi_connh_t conn, enum iscsi_param param,
67 uint32_t *value);
68 int (*send_pdu) (iscsi_connh_t conn, struct iscsi_hdr *hdr,
69 char *data, uint32_t data_size);
70 void (*get_stats) (iscsi_connh_t conn, struct iscsi_stats *stats);
53}; 71};
54 72
55/* 73/*
56 * accessor macros 74 * transport registration upcalls
57 */ 75 */
58#define iscsi_isid(x) \ 76extern int iscsi_register_transport(struct iscsi_transport *tt);
59 (((struct iscsi_class_session *)&(x)->starget_data)->isid) 77extern int iscsi_unregister_transport(struct iscsi_transport *tt);
60#define iscsi_tsih(x) \
61 (((struct iscsi_class_session *)&(x)->starget_data)->tsih)
62#define iscsi_header_digest(x) \
63 (((struct iscsi_class_session *)&(x)->starget_data)->header_digest)
64#define iscsi_data_digest(x) \
65 (((struct iscsi_class_session *)&(x)->starget_data)->data_digest)
66#define iscsi_port(x) \
67 (((struct iscsi_class_session *)&(x)->starget_data)->port)
68#define iscsi_addr_type(x) \
69 (((struct iscsi_class_session *)&(x)->starget_data)->addr_type)
70#define iscsi_sin_addr(x) \
71 (((struct iscsi_class_session *)&(x)->starget_data)->u.sin_addr)
72#define iscsi_sin6_addr(x) \
73 (((struct iscsi_class_session *)&(x)->starget_data)->u.sin6_addr)
74#define iscsi_tpgt(x) \
75 (((struct iscsi_class_session *)&(x)->starget_data)->tpgt)
76#define iscsi_initial_r2t(x) \
77 (((struct iscsi_class_session *)&(x)->starget_data)->initial_r2t)
78#define iscsi_immediate_data(x) \
79 (((struct iscsi_class_session *)&(x)->starget_data)->immediate_data)
80#define iscsi_max_recv_data_segment_len(x) \
81 (((struct iscsi_class_session *)&(x)->starget_data)->max_recv_data_segment_len)
82#define iscsi_max_burst_len(x) \
83 (((struct iscsi_class_session *)&(x)->starget_data)->max_burst_len)
84#define iscsi_first_burst_len(x) \
85 (((struct iscsi_class_session *)&(x)->starget_data)->first_burst_len)
86#define iscsi_def_time2wait(x) \
87 (((struct iscsi_class_session *)&(x)->starget_data)->def_time2wait)
88#define iscsi_def_time2retain(x) \
89 (((struct iscsi_class_session *)&(x)->starget_data)->def_time2retain)
90#define iscsi_max_outstanding_r2t(x) \
91 (((struct iscsi_class_session *)&(x)->starget_data)->max_outstanding_r2t)
92#define iscsi_data_pdu_in_order(x) \
93 (((struct iscsi_class_session *)&(x)->starget_data)->data_pdu_in_order)
94#define iscsi_data_sequence_in_order(x) \
95 (((struct iscsi_class_session *)&(x)->starget_data)->data_sequence_in_order)
96#define iscsi_erl(x) \
97 (((struct iscsi_class_session *)&(x)->starget_data)->erl)
98 78
99/* 79/*
100 * The functions by which the transport class and the driver communicate 80 * control plane upcalls
101 */ 81 */
102struct iscsi_function_template { 82extern void iscsi_conn_error(iscsi_connh_t conn, enum iscsi_err error);
103 /* 83extern int iscsi_recv_pdu(iscsi_connh_t conn, struct iscsi_hdr *hdr,
104 * target attrs 84 char *data, uint32_t data_size);
105 */
106 void (*get_isid)(struct scsi_target *);
107 void (*get_tsih)(struct scsi_target *);
108 void (*get_header_digest)(struct scsi_target *);
109 void (*get_data_digest)(struct scsi_target *);
110 void (*get_port)(struct scsi_target *);
111 void (*get_tpgt)(struct scsi_target *);
112 /*
113 * In get_ip_address the lld must set the address and
114 * the address type
115 */
116 void (*get_ip_address)(struct scsi_target *);
117 /*
118 * The lld should snprintf the name or alias to the buffer
119 */
120 ssize_t (*get_target_name)(struct scsi_target *, char *, ssize_t);
121 ssize_t (*get_target_alias)(struct scsi_target *, char *, ssize_t);
122 void (*get_initial_r2t)(struct scsi_target *);
123 void (*get_immediate_data)(struct scsi_target *);
124 void (*get_max_recv_data_segment_len)(struct scsi_target *);
125 void (*get_max_burst_len)(struct scsi_target *);
126 void (*get_first_burst_len)(struct scsi_target *);
127 void (*get_def_time2wait)(struct scsi_target *);
128 void (*get_def_time2retain)(struct scsi_target *);
129 void (*get_max_outstanding_r2t)(struct scsi_target *);
130 void (*get_data_pdu_in_order)(struct scsi_target *);
131 void (*get_data_sequence_in_order)(struct scsi_target *);
132 void (*get_erl)(struct scsi_target *);
133
134 /*
135 * host atts
136 */
137
138 /*
139 * The lld should snprintf the name or alias to the buffer
140 */
141 ssize_t (*get_initiator_alias)(struct Scsi_Host *, char *, ssize_t);
142 ssize_t (*get_initiator_name)(struct Scsi_Host *, char *, ssize_t);
143 /*
144 * The driver sets these to tell the transport class it
145 * wants the attributes displayed in sysfs. If the show_ flag
146 * is not set, the attribute will be private to the transport
147 * class. We could probably just test if a get_ fn was set
148 * since we only use the values for sysfs but this is how
149 * fc does it too.
150 */
151 unsigned long show_isid:1;
152 unsigned long show_tsih:1;
153 unsigned long show_header_digest:1;
154 unsigned long show_data_digest:1;
155 unsigned long show_port:1;
156 unsigned long show_tpgt:1;
157 unsigned long show_ip_address:1;
158 unsigned long show_target_name:1;
159 unsigned long show_target_alias:1;
160 unsigned long show_initial_r2t:1;
161 unsigned long show_immediate_data:1;
162 unsigned long show_max_recv_data_segment_len:1;
163 unsigned long show_max_burst_len:1;
164 unsigned long show_first_burst_len:1;
165 unsigned long show_def_time2wait:1;
166 unsigned long show_def_time2retain:1;
167 unsigned long show_max_outstanding_r2t:1;
168 unsigned long show_data_pdu_in_order:1;
169 unsigned long show_data_sequence_in_order:1;
170 unsigned long show_erl:1;
171 unsigned long show_initiator_name:1;
172 unsigned long show_initiator_alias:1;
173};
174
175struct scsi_transport_template *iscsi_attach_transport(struct iscsi_function_template *);
176void iscsi_release_transport(struct scsi_transport_template *);
177 85
178#endif 86#endif
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