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-rw-r--r--include/scsi/iscsi_if.h245
-rw-r--r--include/scsi/iscsi_proto.h589
-rw-r--r--include/scsi/scsi_transport_iscsi.h202
3 files changed, 889 insertions, 147 deletions
diff --git a/include/scsi/iscsi_if.h b/include/scsi/iscsi_if.h
new file mode 100644
index 000000000000..be1bc792ab18
--- /dev/null
+++ b/include/scsi/iscsi_if.h
@@ -0,0 +1,245 @@
1/*
2 * iSCSI User/Kernel Shares (Defines, Constants, Protocol definitions, etc)
3 *
4 * Copyright (C) 2005 Dmitry Yusupov
5 * Copyright (C) 2005 Alex Aizman
6 * maintained by open-iscsi@googlegroups.com
7 *
8 * This program is free software; you can redistribute it and/or modify
9 * it under the terms of the GNU General Public License as published
10 * by the Free Software Foundation; either version 2 of the License, or
11 * (at your option) any later version.
12 *
13 * This program is distributed in the hope that it will be useful, but
14 * WITHOUT ANY WARRANTY; without even the implied warranty of
15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
16 * General Public License for more details.
17 *
18 * See the file COPYING included with this distribution for more details.
19 */
20
21#ifndef ISCSI_IF_H
22#define ISCSI_IF_H
23
24#include <scsi/iscsi_proto.h>
25
26#define UEVENT_BASE 10
27#define KEVENT_BASE 100
28#define ISCSI_ERR_BASE 1000
29
30enum iscsi_uevent_e {
31 ISCSI_UEVENT_UNKNOWN = 0,
32
33 /* down events */
34 ISCSI_UEVENT_CREATE_SESSION = UEVENT_BASE + 1,
35 ISCSI_UEVENT_DESTROY_SESSION = UEVENT_BASE + 2,
36 ISCSI_UEVENT_CREATE_CONN = UEVENT_BASE + 3,
37 ISCSI_UEVENT_DESTROY_CONN = UEVENT_BASE + 4,
38 ISCSI_UEVENT_BIND_CONN = UEVENT_BASE + 5,
39 ISCSI_UEVENT_SET_PARAM = UEVENT_BASE + 6,
40 ISCSI_UEVENT_START_CONN = UEVENT_BASE + 7,
41 ISCSI_UEVENT_STOP_CONN = UEVENT_BASE + 8,
42 ISCSI_UEVENT_SEND_PDU = UEVENT_BASE + 9,
43 ISCSI_UEVENT_GET_STATS = UEVENT_BASE + 10,
44 ISCSI_UEVENT_GET_PARAM = UEVENT_BASE + 11,
45
46 /* up events */
47 ISCSI_KEVENT_RECV_PDU = KEVENT_BASE + 1,
48 ISCSI_KEVENT_CONN_ERROR = KEVENT_BASE + 2,
49 ISCSI_KEVENT_IF_ERROR = KEVENT_BASE + 3,
50};
51
52struct iscsi_uevent {
53 uint32_t type; /* k/u events type */
54 uint32_t iferror; /* carries interface or resource errors */
55 uint64_t transport_handle;
56
57 union {
58 /* messages u -> k */
59 struct msg_create_session {
60 uint32_t initial_cmdsn;
61 } c_session;
62 struct msg_destroy_session {
63 uint64_t session_handle;
64 uint32_t sid;
65 } d_session;
66 struct msg_create_conn {
67 uint64_t session_handle;
68 uint32_t cid;
69 uint32_t sid;
70 } c_conn;
71 struct msg_bind_conn {
72 uint64_t session_handle;
73 uint64_t conn_handle;
74 uint32_t transport_fd;
75 uint32_t is_leading;
76 } b_conn;
77 struct msg_destroy_conn {
78 uint64_t conn_handle;
79 uint32_t cid;
80 } d_conn;
81 struct msg_send_pdu {
82 uint32_t hdr_size;
83 uint32_t data_size;
84 uint64_t conn_handle;
85 } send_pdu;
86 struct msg_set_param {
87 uint64_t conn_handle;
88 uint32_t param; /* enum iscsi_param */
89 uint32_t value;
90 } set_param;
91 struct msg_start_conn {
92 uint64_t conn_handle;
93 } start_conn;
94 struct msg_stop_conn {
95 uint64_t conn_handle;
96 uint32_t flag;
97 } stop_conn;
98 struct msg_get_stats {
99 uint64_t conn_handle;
100 } get_stats;
101 } u;
102 union {
103 /* messages k -> u */
104 uint64_t handle;
105 int retcode;
106 struct msg_create_session_ret {
107 uint64_t session_handle;
108 uint32_t sid;
109 } c_session_ret;
110 struct msg_recv_req {
111 uint64_t recv_handle;
112 uint64_t conn_handle;
113 } recv_req;
114 struct msg_conn_error {
115 uint64_t conn_handle;
116 uint32_t error; /* enum iscsi_err */
117 } connerror;
118 } r;
119} __attribute__ ((aligned (sizeof(uint64_t))));
120
121/*
122 * Common error codes
123 */
124enum iscsi_err {
125 ISCSI_OK = 0,
126
127 ISCSI_ERR_DATASN = ISCSI_ERR_BASE + 1,
128 ISCSI_ERR_DATA_OFFSET = ISCSI_ERR_BASE + 2,
129 ISCSI_ERR_MAX_CMDSN = ISCSI_ERR_BASE + 3,
130 ISCSI_ERR_EXP_CMDSN = ISCSI_ERR_BASE + 4,
131 ISCSI_ERR_BAD_OPCODE = ISCSI_ERR_BASE + 5,
132 ISCSI_ERR_DATALEN = ISCSI_ERR_BASE + 6,
133 ISCSI_ERR_AHSLEN = ISCSI_ERR_BASE + 7,
134 ISCSI_ERR_PROTO = ISCSI_ERR_BASE + 8,
135 ISCSI_ERR_LUN = ISCSI_ERR_BASE + 9,
136 ISCSI_ERR_BAD_ITT = ISCSI_ERR_BASE + 10,
137 ISCSI_ERR_CONN_FAILED = ISCSI_ERR_BASE + 11,
138 ISCSI_ERR_R2TSN = ISCSI_ERR_BASE + 12,
139 ISCSI_ERR_SESSION_FAILED = ISCSI_ERR_BASE + 13,
140 ISCSI_ERR_HDR_DGST = ISCSI_ERR_BASE + 14,
141 ISCSI_ERR_DATA_DGST = ISCSI_ERR_BASE + 15,
142 ISCSI_ERR_PARAM_NOT_FOUND = ISCSI_ERR_BASE + 16
143};
144
145/*
146 * iSCSI Parameters (RFC3720)
147 */
148enum iscsi_param {
149 ISCSI_PARAM_MAX_RECV_DLENGTH = 0,
150 ISCSI_PARAM_MAX_XMIT_DLENGTH = 1,
151 ISCSI_PARAM_HDRDGST_EN = 2,
152 ISCSI_PARAM_DATADGST_EN = 3,
153 ISCSI_PARAM_INITIAL_R2T_EN = 4,
154 ISCSI_PARAM_MAX_R2T = 5,
155 ISCSI_PARAM_IMM_DATA_EN = 6,
156 ISCSI_PARAM_FIRST_BURST = 7,
157 ISCSI_PARAM_MAX_BURST = 8,
158 ISCSI_PARAM_PDU_INORDER_EN = 9,
159 ISCSI_PARAM_DATASEQ_INORDER_EN = 10,
160 ISCSI_PARAM_ERL = 11,
161 ISCSI_PARAM_IFMARKER_EN = 12,
162 ISCSI_PARAM_OFMARKER_EN = 13,
163};
164#define ISCSI_PARAM_MAX 14
165
166typedef uint64_t iscsi_sessionh_t; /* iSCSI Data-Path session handle */
167typedef uint64_t iscsi_connh_t; /* iSCSI Data-Path connection handle */
168
169#define iscsi_ptr(_handle) ((void*)(unsigned long)_handle)
170#define iscsi_handle(_ptr) ((uint64_t)(unsigned long)_ptr)
171#define iscsi_hostdata(_hostdata) ((void*)_hostdata + sizeof(unsigned long))
172
173/*
174 * These flags presents iSCSI Data-Path capabilities.
175 */
176#define CAP_RECOVERY_L0 0x1
177#define CAP_RECOVERY_L1 0x2
178#define CAP_RECOVERY_L2 0x4
179#define CAP_MULTI_R2T 0x8
180#define CAP_HDRDGST 0x10
181#define CAP_DATADGST 0x20
182#define CAP_MULTI_CONN 0x40
183#define CAP_TEXT_NEGO 0x80
184#define CAP_MARKERS 0x100
185
186/*
187 * These flags describes reason of stop_conn() call
188 */
189#define STOP_CONN_TERM 0x1
190#define STOP_CONN_SUSPEND 0x2
191#define STOP_CONN_RECOVER 0x3
192
193#define ISCSI_STATS_CUSTOM_MAX 32
194#define ISCSI_STATS_CUSTOM_DESC_MAX 64
195struct iscsi_stats_custom {
196 char desc[ISCSI_STATS_CUSTOM_DESC_MAX];
197 uint64_t value;
198};
199
200/*
201 * struct iscsi_stats - iSCSI Statistics (iSCSI MIB)
202 *
203 * Note: this structure contains counters collected on per-connection basis.
204 */
205struct iscsi_stats {
206 /* octets */
207 uint64_t txdata_octets;
208 uint64_t rxdata_octets;
209
210 /* xmit pdus */
211 uint32_t noptx_pdus;
212 uint32_t scsicmd_pdus;
213 uint32_t tmfcmd_pdus;
214 uint32_t login_pdus;
215 uint32_t text_pdus;
216 uint32_t dataout_pdus;
217 uint32_t logout_pdus;
218 uint32_t snack_pdus;
219
220 /* recv pdus */
221 uint32_t noprx_pdus;
222 uint32_t scsirsp_pdus;
223 uint32_t tmfrsp_pdus;
224 uint32_t textrsp_pdus;
225 uint32_t datain_pdus;
226 uint32_t logoutrsp_pdus;
227 uint32_t r2t_pdus;
228 uint32_t async_pdus;
229 uint32_t rjt_pdus;
230
231 /* errors */
232 uint32_t digest_err;
233 uint32_t timeout_err;
234
235 /*
236 * iSCSI Custom Statistics support, i.e. Transport could
237 * extend existing MIB statistics with its own specific statistics
238 * up to ISCSI_STATS_CUSTOM_MAX
239 */
240 uint32_t custom_length;
241 struct iscsi_stats_custom custom[0]
242 __attribute__ ((aligned (sizeof(uint64_t))));
243};
244
245#endif
diff --git a/include/scsi/iscsi_proto.h b/include/scsi/iscsi_proto.h
new file mode 100644
index 000000000000..4feda05fdf25
--- /dev/null
+++ b/include/scsi/iscsi_proto.h
@@ -0,0 +1,589 @@
1/*
2 * RFC 3720 (iSCSI) protocol data types
3 *
4 * Copyright (C) 2005 Dmitry Yusupov
5 * Copyright (C) 2005 Alex Aizman
6 * maintained by open-iscsi@googlegroups.com
7 *
8 * This program is free software; you can redistribute it and/or modify
9 * it under the terms of the GNU General Public License as published
10 * by the Free Software Foundation; either version 2 of the License, or
11 * (at your option) any later version.
12 *
13 * This program is distributed in the hope that it will be useful, but
14 * WITHOUT ANY WARRANTY; without even the implied warranty of
15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
16 * General Public License for more details.
17 *
18 * See the file COPYING included with this distribution for more details.
19 */
20
21#ifndef ISCSI_PROTO_H
22#define ISCSI_PROTO_H
23
24#define ISCSI_VERSION_STR "0.3"
25#define ISCSI_DATE_STR "22-Apr-2005"
26#define ISCSI_DRAFT20_VERSION 0x00
27
28/* default iSCSI listen port for incoming connections */
29#define ISCSI_LISTEN_PORT 3260
30
31/* Padding word length */
32#define PAD_WORD_LEN 4
33
34/*
35 * useful common(control and data pathes) macro
36 */
37#define ntoh24(p) (((p)[0] << 16) | ((p)[1] << 8) | ((p)[2]))
38#define hton24(p, v) { \
39 p[0] = (((v) >> 16) & 0xFF); \
40 p[1] = (((v) >> 8) & 0xFF); \
41 p[2] = ((v) & 0xFF); \
42}
43#define zero_data(p) {p[0]=0;p[1]=0;p[2]=0;}
44
45/*
46 * iSCSI Template Message Header
47 */
48struct iscsi_hdr {
49 uint8_t opcode;
50 uint8_t flags; /* Final bit */
51 uint8_t rsvd2[2];
52 uint8_t hlength; /* AHSs total length */
53 uint8_t dlength[3]; /* Data length */
54 uint8_t lun[8];
55 __be32 itt; /* Initiator Task Tag */
56 __be32 ttt; /* Target Task Tag */
57 __be32 statsn;
58 __be32 exp_statsn;
59 __be32 max_statsn;
60 uint8_t other[12];
61};
62
63/************************* RFC 3720 Begin *****************************/
64
65#define ISCSI_RESERVED_TAG 0xffffffff
66
67/* Opcode encoding bits */
68#define ISCSI_OP_RETRY 0x80
69#define ISCSI_OP_IMMEDIATE 0x40
70#define ISCSI_OPCODE_MASK 0x3F
71
72/* Initiator Opcode values */
73#define ISCSI_OP_NOOP_OUT 0x00
74#define ISCSI_OP_SCSI_CMD 0x01
75#define ISCSI_OP_SCSI_TMFUNC 0x02
76#define ISCSI_OP_LOGIN 0x03
77#define ISCSI_OP_TEXT 0x04
78#define ISCSI_OP_SCSI_DATA_OUT 0x05
79#define ISCSI_OP_LOGOUT 0x06
80#define ISCSI_OP_SNACK 0x10
81
82#define ISCSI_OP_VENDOR1_CMD 0x1c
83#define ISCSI_OP_VENDOR2_CMD 0x1d
84#define ISCSI_OP_VENDOR3_CMD 0x1e
85#define ISCSI_OP_VENDOR4_CMD 0x1f
86
87/* Target Opcode values */
88#define ISCSI_OP_NOOP_IN 0x20
89#define ISCSI_OP_SCSI_CMD_RSP 0x21
90#define ISCSI_OP_SCSI_TMFUNC_RSP 0x22
91#define ISCSI_OP_LOGIN_RSP 0x23
92#define ISCSI_OP_TEXT_RSP 0x24
93#define ISCSI_OP_SCSI_DATA_IN 0x25
94#define ISCSI_OP_LOGOUT_RSP 0x26
95#define ISCSI_OP_R2T 0x31
96#define ISCSI_OP_ASYNC_EVENT 0x32
97#define ISCSI_OP_REJECT 0x3f
98
99struct iscsi_ahs_hdr {
100 __be16 ahslength;
101 uint8_t ahstype;
102 uint8_t ahspec[5];
103};
104
105#define ISCSI_AHSTYPE_CDB 1
106#define ISCSI_AHSTYPE_RLENGTH 2
107
108/* iSCSI PDU Header */
109struct iscsi_cmd {
110 uint8_t opcode;
111 uint8_t flags;
112 __be16 rsvd2;
113 uint8_t hlength;
114 uint8_t dlength[3];
115 uint8_t lun[8];
116 __be32 itt; /* Initiator Task Tag */
117 __be32 data_length;
118 __be32 cmdsn;
119 __be32 exp_statsn;
120 uint8_t cdb[16]; /* SCSI Command Block */
121 /* Additional Data (Command Dependent) */
122};
123
124/* Command PDU flags */
125#define ISCSI_FLAG_CMD_FINAL 0x80
126#define ISCSI_FLAG_CMD_READ 0x40
127#define ISCSI_FLAG_CMD_WRITE 0x20
128#define ISCSI_FLAG_CMD_ATTR_MASK 0x07 /* 3 bits */
129
130/* SCSI Command Attribute values */
131#define ISCSI_ATTR_UNTAGGED 0
132#define ISCSI_ATTR_SIMPLE 1
133#define ISCSI_ATTR_ORDERED 2
134#define ISCSI_ATTR_HEAD_OF_QUEUE 3
135#define ISCSI_ATTR_ACA 4
136
137struct iscsi_rlength_ahdr {
138 __be16 ahslength;
139 uint8_t ahstype;
140 uint8_t reserved;
141 __be32 read_length;
142};
143
144/* SCSI Response Header */
145struct iscsi_cmd_rsp {
146 uint8_t opcode;
147 uint8_t flags;
148 uint8_t response;
149 uint8_t cmd_status;
150 uint8_t hlength;
151 uint8_t dlength[3];
152 uint8_t rsvd[8];
153 __be32 itt; /* Initiator Task Tag */
154 __be32 rsvd1;
155 __be32 statsn;
156 __be32 exp_cmdsn;
157 __be32 max_cmdsn;
158 __be32 exp_datasn;
159 __be32 bi_residual_count;
160 __be32 residual_count;
161 /* Response or Sense Data (optional) */
162};
163
164/* Command Response PDU flags */
165#define ISCSI_FLAG_CMD_BIDI_OVERFLOW 0x10
166#define ISCSI_FLAG_CMD_BIDI_UNDERFLOW 0x08
167#define ISCSI_FLAG_CMD_OVERFLOW 0x04
168#define ISCSI_FLAG_CMD_UNDERFLOW 0x02
169
170/* iSCSI Status values. Valid if Rsp Selector bit is not set */
171#define ISCSI_STATUS_CMD_COMPLETED 0
172#define ISCSI_STATUS_TARGET_FAILURE 1
173#define ISCSI_STATUS_SUBSYS_FAILURE 2
174
175/* Asynchronous Event Header */
176struct iscsi_async {
177 uint8_t opcode;
178 uint8_t flags;
179 uint8_t rsvd2[2];
180 uint8_t rsvd3;
181 uint8_t dlength[3];
182 uint8_t lun[8];
183 uint8_t rsvd4[8];
184 __be32 statsn;
185 __be32 exp_cmdsn;
186 __be32 max_cmdsn;
187 uint8_t async_event;
188 uint8_t async_vcode;
189 __be16 param1;
190 __be16 param2;
191 __be16 param3;
192 uint8_t rsvd5[4];
193};
194
195/* iSCSI Event Codes */
196#define ISCSI_ASYNC_MSG_SCSI_EVENT 0
197#define ISCSI_ASYNC_MSG_REQUEST_LOGOUT 1
198#define ISCSI_ASYNC_MSG_DROPPING_CONNECTION 2
199#define ISCSI_ASYNC_MSG_DROPPING_ALL_CONNECTIONS 3
200#define ISCSI_ASYNC_MSG_PARAM_NEGOTIATION 4
201#define ISCSI_ASYNC_MSG_VENDOR_SPECIFIC 255
202
203/* NOP-Out Message */
204struct iscsi_nopout {
205 uint8_t opcode;
206 uint8_t flags;
207 __be16 rsvd2;
208 uint8_t rsvd3;
209 uint8_t dlength[3];
210 uint8_t lun[8];
211 __be32 itt; /* Initiator Task Tag */
212 __be32 ttt; /* Target Transfer Tag */
213 __be32 cmdsn;
214 __be32 exp_statsn;
215 uint8_t rsvd4[16];
216};
217
218/* NOP-In Message */
219struct iscsi_nopin {
220 uint8_t opcode;
221 uint8_t flags;
222 __be16 rsvd2;
223 uint8_t rsvd3;
224 uint8_t dlength[3];
225 uint8_t lun[8];
226 __be32 itt; /* Initiator Task Tag */
227 __be32 ttt; /* Target Transfer Tag */
228 __be32 statsn;
229 __be32 exp_cmdsn;
230 __be32 max_cmdsn;
231 uint8_t rsvd4[12];
232};
233
234/* SCSI Task Management Message Header */
235struct iscsi_tm {
236 uint8_t opcode;
237 uint8_t flags;
238 uint8_t rsvd1[2];
239 uint8_t hlength;
240 uint8_t dlength[3];
241 uint8_t lun[8];
242 __be32 itt; /* Initiator Task Tag */
243 __be32 rtt; /* Reference Task Tag */
244 __be32 cmdsn;
245 __be32 exp_statsn;
246 __be32 refcmdsn;
247 __be32 exp_datasn;
248 uint8_t rsvd2[8];
249};
250
251#define ISCSI_FLAG_TM_FUNC_MASK 0x7F
252
253/* Function values */
254#define ISCSI_TM_FUNC_ABORT_TASK 1
255#define ISCSI_TM_FUNC_ABORT_TASK_SET 2
256#define ISCSI_TM_FUNC_CLEAR_ACA 3
257#define ISCSI_TM_FUNC_CLEAR_TASK_SET 4
258#define ISCSI_TM_FUNC_LOGICAL_UNIT_RESET 5
259#define ISCSI_TM_FUNC_TARGET_WARM_RESET 6
260#define ISCSI_TM_FUNC_TARGET_COLD_RESET 7
261#define ISCSI_TM_FUNC_TASK_REASSIGN 8
262
263/* SCSI Task Management Response Header */
264struct iscsi_tm_rsp {
265 uint8_t opcode;
266 uint8_t flags;
267 uint8_t response; /* see Response values below */
268 uint8_t qualifier;
269 uint8_t hlength;
270 uint8_t dlength[3];
271 uint8_t rsvd2[8];
272 __be32 itt; /* Initiator Task Tag */
273 __be32 rtt; /* Reference Task Tag */
274 __be32 statsn;
275 __be32 exp_cmdsn;
276 __be32 max_cmdsn;
277 uint8_t rsvd3[12];
278};
279
280/* Response values */
281#define ISCSI_TMF_RSP_COMPLETE 0x00
282#define ISCSI_TMF_RSP_NO_TASK 0x01
283#define ISCSI_TMF_RSP_NO_LUN 0x02
284#define ISCSI_TMF_RSP_TASK_ALLEGIANT 0x03
285#define ISCSI_TMF_RSP_NO_FAILOVER 0x04
286#define ISCSI_TMF_RSP_NOT_SUPPORTED 0x05
287#define ISCSI_TMF_RSP_AUTH_FAILED 0x06
288#define ISCSI_TMF_RSP_REJECTED 0xff
289
290/* Ready To Transfer Header */
291struct iscsi_r2t_rsp {
292 uint8_t opcode;
293 uint8_t flags;
294 uint8_t rsvd2[2];
295 uint8_t hlength;
296 uint8_t dlength[3];
297 uint8_t lun[8];
298 __be32 itt; /* Initiator Task Tag */
299 __be32 ttt; /* Target Transfer Tag */
300 __be32 statsn;
301 __be32 exp_cmdsn;
302 __be32 max_cmdsn;
303 __be32 r2tsn;
304 __be32 data_offset;
305 __be32 data_length;
306};
307
308/* SCSI Data Hdr */
309struct iscsi_data {
310 uint8_t opcode;
311 uint8_t flags;
312 uint8_t rsvd2[2];
313 uint8_t rsvd3;
314 uint8_t dlength[3];
315 uint8_t lun[8];
316 __be32 itt;
317 __be32 ttt;
318 __be32 rsvd4;
319 __be32 exp_statsn;
320 __be32 rsvd5;
321 __be32 datasn;
322 __be32 offset;
323 __be32 rsvd6;
324 /* Payload */
325};
326
327/* SCSI Data Response Hdr */
328struct iscsi_data_rsp {
329 uint8_t opcode;
330 uint8_t flags;
331 uint8_t rsvd2;
332 uint8_t cmd_status;
333 uint8_t hlength;
334 uint8_t dlength[3];
335 uint8_t lun[8];
336 __be32 itt;
337 __be32 ttt;
338 __be32 statsn;
339 __be32 exp_cmdsn;
340 __be32 max_cmdsn;
341 __be32 datasn;
342 __be32 offset;
343 __be32 residual_count;
344};
345
346/* Data Response PDU flags */
347#define ISCSI_FLAG_DATA_ACK 0x40
348#define ISCSI_FLAG_DATA_OVERFLOW 0x04
349#define ISCSI_FLAG_DATA_UNDERFLOW 0x02
350#define ISCSI_FLAG_DATA_STATUS 0x01
351
352/* Text Header */
353struct iscsi_text {
354 uint8_t opcode;
355 uint8_t flags;
356 uint8_t rsvd2[2];
357 uint8_t hlength;
358 uint8_t dlength[3];
359 uint8_t rsvd4[8];
360 __be32 itt;
361 __be32 ttt;
362 __be32 cmdsn;
363 __be32 exp_statsn;
364 uint8_t rsvd5[16];
365 /* Text - key=value pairs */
366};
367
368#define ISCSI_FLAG_TEXT_CONTINUE 0x40
369
370/* Text Response Header */
371struct iscsi_text_rsp {
372 uint8_t opcode;
373 uint8_t flags;
374 uint8_t rsvd2[2];
375 uint8_t hlength;
376 uint8_t dlength[3];
377 uint8_t rsvd4[8];
378 __be32 itt;
379 __be32 ttt;
380 __be32 statsn;
381 __be32 exp_cmdsn;
382 __be32 max_cmdsn;
383 uint8_t rsvd5[12];
384 /* Text Response - key:value pairs */
385};
386
387/* Login Header */
388struct iscsi_login {
389 uint8_t opcode;
390 uint8_t flags;
391 uint8_t max_version; /* Max. version supported */
392 uint8_t min_version; /* Min. version supported */
393 uint8_t hlength;
394 uint8_t dlength[3];
395 uint8_t isid[6]; /* Initiator Session ID */
396 __be16 tsih; /* Target Session Handle */
397 __be32 itt; /* Initiator Task Tag */
398 __be16 cid;
399 __be16 rsvd3;
400 __be32 cmdsn;
401 __be32 exp_statsn;
402 uint8_t rsvd5[16];
403};
404
405/* Login PDU flags */
406#define ISCSI_FLAG_LOGIN_TRANSIT 0x80
407#define ISCSI_FLAG_LOGIN_CONTINUE 0x40
408#define ISCSI_FLAG_LOGIN_CURRENT_STAGE_MASK 0x0C /* 2 bits */
409#define ISCSI_FLAG_LOGIN_NEXT_STAGE_MASK 0x03 /* 2 bits */
410
411#define ISCSI_LOGIN_CURRENT_STAGE(flags) \
412 ((flags & ISCSI_FLAG_LOGIN_CURRENT_STAGE_MASK) >> 2)
413#define ISCSI_LOGIN_NEXT_STAGE(flags) \
414 (flags & ISCSI_FLAG_LOGIN_NEXT_STAGE_MASK)
415
416/* Login Response Header */
417struct iscsi_login_rsp {
418 uint8_t opcode;
419 uint8_t flags;
420 uint8_t max_version; /* Max. version supported */
421 uint8_t active_version; /* Active version */
422 uint8_t hlength;
423 uint8_t dlength[3];
424 uint8_t isid[6]; /* Initiator Session ID */
425 __be16 tsih; /* Target Session Handle */
426 __be32 itt; /* Initiator Task Tag */
427 __be32 rsvd3;
428 __be32 statsn;
429 __be32 exp_cmdsn;
430 __be32 max_cmdsn;
431 uint8_t status_class; /* see Login RSP ststus classes below */
432 uint8_t status_detail; /* see Login RSP Status details below */
433 uint8_t rsvd4[10];
434};
435
436/* Login stage (phase) codes for CSG, NSG */
437#define ISCSI_INITIAL_LOGIN_STAGE -1
438#define ISCSI_SECURITY_NEGOTIATION_STAGE 0
439#define ISCSI_OP_PARMS_NEGOTIATION_STAGE 1
440#define ISCSI_FULL_FEATURE_PHASE 3
441
442/* Login Status response classes */
443#define ISCSI_STATUS_CLS_SUCCESS 0x00
444#define ISCSI_STATUS_CLS_REDIRECT 0x01
445#define ISCSI_STATUS_CLS_INITIATOR_ERR 0x02
446#define ISCSI_STATUS_CLS_TARGET_ERR 0x03
447
448/* Login Status response detail codes */
449/* Class-0 (Success) */
450#define ISCSI_LOGIN_STATUS_ACCEPT 0x00
451
452/* Class-1 (Redirection) */
453#define ISCSI_LOGIN_STATUS_TGT_MOVED_TEMP 0x01
454#define ISCSI_LOGIN_STATUS_TGT_MOVED_PERM 0x02
455
456/* Class-2 (Initiator Error) */
457#define ISCSI_LOGIN_STATUS_INIT_ERR 0x00
458#define ISCSI_LOGIN_STATUS_AUTH_FAILED 0x01
459#define ISCSI_LOGIN_STATUS_TGT_FORBIDDEN 0x02
460#define ISCSI_LOGIN_STATUS_TGT_NOT_FOUND 0x03
461#define ISCSI_LOGIN_STATUS_TGT_REMOVED 0x04
462#define ISCSI_LOGIN_STATUS_NO_VERSION 0x05
463#define ISCSI_LOGIN_STATUS_ISID_ERROR 0x06
464#define ISCSI_LOGIN_STATUS_MISSING_FIELDS 0x07
465#define ISCSI_LOGIN_STATUS_CONN_ADD_FAILED 0x08
466#define ISCSI_LOGIN_STATUS_NO_SESSION_TYPE 0x09
467#define ISCSI_LOGIN_STATUS_NO_SESSION 0x0a
468#define ISCSI_LOGIN_STATUS_INVALID_REQUEST 0x0b
469
470/* Class-3 (Target Error) */
471#define ISCSI_LOGIN_STATUS_TARGET_ERROR 0x00
472#define ISCSI_LOGIN_STATUS_SVC_UNAVAILABLE 0x01
473#define ISCSI_LOGIN_STATUS_NO_RESOURCES 0x02
474
475/* Logout Header */
476struct iscsi_logout {
477 uint8_t opcode;
478 uint8_t flags;
479 uint8_t rsvd1[2];
480 uint8_t hlength;
481 uint8_t dlength[3];
482 uint8_t rsvd2[8];
483 __be32 itt; /* Initiator Task Tag */
484 __be16 cid;
485 uint8_t rsvd3[2];
486 __be32 cmdsn;
487 __be32 exp_statsn;
488 uint8_t rsvd4[16];
489};
490
491/* Logout PDU flags */
492#define ISCSI_FLAG_LOGOUT_REASON_MASK 0x7F
493
494/* logout reason_code values */
495
496#define ISCSI_LOGOUT_REASON_CLOSE_SESSION 0
497#define ISCSI_LOGOUT_REASON_CLOSE_CONNECTION 1
498#define ISCSI_LOGOUT_REASON_RECOVERY 2
499#define ISCSI_LOGOUT_REASON_AEN_REQUEST 3
500
501/* Logout Response Header */
502struct iscsi_logout_rsp {
503 uint8_t opcode;
504 uint8_t flags;
505 uint8_t response; /* see Logout response values below */
506 uint8_t rsvd2;
507 uint8_t hlength;
508 uint8_t dlength[3];
509 uint8_t rsvd3[8];
510 __be32 itt; /* Initiator Task Tag */
511 __be32 rsvd4;
512 __be32 statsn;
513 __be32 exp_cmdsn;
514 __be32 max_cmdsn;
515 __be32 rsvd5;
516 __be16 t2wait;
517 __be16 t2retain;
518 __be32 rsvd6;
519};
520
521/* logout response status values */
522
523#define ISCSI_LOGOUT_SUCCESS 0
524#define ISCSI_LOGOUT_CID_NOT_FOUND 1
525#define ISCSI_LOGOUT_RECOVERY_UNSUPPORTED 2
526#define ISCSI_LOGOUT_CLEANUP_FAILED 3
527
528/* SNACK Header */
529struct iscsi_snack {
530 uint8_t opcode;
531 uint8_t flags;
532 uint8_t rsvd2[14];
533 __be32 itt;
534 __be32 begrun;
535 __be32 runlength;
536 __be32 exp_statsn;
537 __be32 rsvd3;
538 __be32 exp_datasn;
539 uint8_t rsvd6[8];
540};
541
542/* SNACK PDU flags */
543#define ISCSI_FLAG_SNACK_TYPE_MASK 0x0F /* 4 bits */
544
545/* Reject Message Header */
546struct iscsi_reject {
547 uint8_t opcode;
548 uint8_t flags;
549 uint8_t reason;
550 uint8_t rsvd2;
551 uint8_t hlength;
552 uint8_t dlength[3];
553 uint8_t rsvd3[8];
554 __be32 ffffffff;
555 uint8_t rsvd4[4];
556 __be32 statsn;
557 __be32 exp_cmdsn;
558 __be32 max_cmdsn;
559 __be32 datasn;
560 uint8_t rsvd5[8];
561 /* Text - Rejected hdr */
562};
563
564/* Reason for Reject */
565#define ISCSI_REASON_CMD_BEFORE_LOGIN 1
566#define ISCSI_REASON_DATA_DIGEST_ERROR 2
567#define ISCSI_REASON_DATA_SNACK_REJECT 3
568#define ISCSI_REASON_PROTOCOL_ERROR 4
569#define ISCSI_REASON_CMD_NOT_SUPPORTED 5
570#define ISCSI_REASON_IMM_CMD_REJECT 6
571#define ISCSI_REASON_TASK_IN_PROGRESS 7
572#define ISCSI_REASON_INVALID_SNACK 8
573#define ISCSI_REASON_BOOKMARK_INVALID 9
574#define ISCSI_REASON_BOOKMARK_NO_RESOURCES 10
575#define ISCSI_REASON_NEGOTIATION_RESET 11
576
577/* Max. number of Key=Value pairs in a text message */
578#define MAX_KEY_VALUE_PAIRS 8192
579
580/* maximum length for text keys/values */
581#define KEY_MAXLEN 64
582#define VALUE_MAXLEN 255
583#define TARGET_NAME_MAXLEN VALUE_MAXLEN
584
585#define DEFAULT_MAX_RECV_DATA_SEGMENT_LENGTH 8192
586
587/************************* RFC 3720 End *****************************/
588
589#endif /* ISCSI_PROTO_H */
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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