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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 | ||
30 | enum 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 | ||
52 | struct 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 | */ | |
124 | enum 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 | */ | |
148 | enum 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 | ||
166 | typedef uint64_t iscsi_sessionh_t; /* iSCSI Data-Path session handle */ | |
167 | typedef 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 | |
195 | struct 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 | */ | |
205 | struct 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 |