fs: use kmem_cache_zalloc instead
[pv_ops_mirror.git] / include / scsi / iscsi_if.h
blob50e907f4204849177f8e883ced1ec53b3030504f
1 /*
2 * iSCSI User/Kernel Shares (Defines, Constants, Protocol definitions, etc)
4 * Copyright (C) 2005 Dmitry Yusupov
5 * Copyright (C) 2005 Alex Aizman
6 * maintained by open-iscsi@googlegroups.com
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.
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.
18 * See the file COPYING included with this distribution for more details.
21 #ifndef ISCSI_IF_H
22 #define ISCSI_IF_H
24 #include <scsi/iscsi_proto.h>
26 #define UEVENT_BASE 10
27 #define KEVENT_BASE 100
28 #define ISCSI_ERR_BASE 1000
30 enum iscsi_uevent_e {
31 ISCSI_UEVENT_UNKNOWN = 0,
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,
46 ISCSI_UEVENT_TRANSPORT_EP_CONNECT = UEVENT_BASE + 12,
47 ISCSI_UEVENT_TRANSPORT_EP_POLL = UEVENT_BASE + 13,
48 ISCSI_UEVENT_TRANSPORT_EP_DISCONNECT = UEVENT_BASE + 14,
50 ISCSI_UEVENT_TGT_DSCVR = UEVENT_BASE + 15,
51 ISCSI_UEVENT_SET_HOST_PARAM = UEVENT_BASE + 16,
53 /* up events */
54 ISCSI_KEVENT_RECV_PDU = KEVENT_BASE + 1,
55 ISCSI_KEVENT_CONN_ERROR = KEVENT_BASE + 2,
56 ISCSI_KEVENT_IF_ERROR = KEVENT_BASE + 3,
57 ISCSI_KEVENT_DESTROY_SESSION = KEVENT_BASE + 4,
60 enum iscsi_tgt_dscvr {
61 ISCSI_TGT_DSCVR_SEND_TARGETS = 1,
62 ISCSI_TGT_DSCVR_ISNS = 2,
63 ISCSI_TGT_DSCVR_SLP = 3,
66 struct iscsi_uevent {
67 uint32_t type; /* k/u events type */
68 uint32_t iferror; /* carries interface or resource errors */
69 uint64_t transport_handle;
71 union {
72 /* messages u -> k */
73 struct msg_create_session {
74 uint32_t initial_cmdsn;
75 uint16_t cmds_max;
76 uint16_t queue_depth;
77 } c_session;
78 struct msg_destroy_session {
79 uint32_t sid;
80 } d_session;
81 struct msg_create_conn {
82 uint32_t sid;
83 uint32_t cid;
84 } c_conn;
85 struct msg_bind_conn {
86 uint32_t sid;
87 uint32_t cid;
88 uint64_t transport_eph;
89 uint32_t is_leading;
90 } b_conn;
91 struct msg_destroy_conn {
92 uint32_t sid;
93 uint32_t cid;
94 } d_conn;
95 struct msg_send_pdu {
96 uint32_t sid;
97 uint32_t cid;
98 uint32_t hdr_size;
99 uint32_t data_size;
100 } send_pdu;
101 struct msg_set_param {
102 uint32_t sid;
103 uint32_t cid;
104 uint32_t param; /* enum iscsi_param */
105 uint32_t len;
106 } set_param;
107 struct msg_start_conn {
108 uint32_t sid;
109 uint32_t cid;
110 } start_conn;
111 struct msg_stop_conn {
112 uint32_t sid;
113 uint32_t cid;
114 uint64_t conn_handle;
115 uint32_t flag;
116 } stop_conn;
117 struct msg_get_stats {
118 uint32_t sid;
119 uint32_t cid;
120 } get_stats;
121 struct msg_transport_connect {
122 uint32_t non_blocking;
123 } ep_connect;
124 struct msg_transport_poll {
125 uint64_t ep_handle;
126 uint32_t timeout_ms;
127 } ep_poll;
128 struct msg_transport_disconnect {
129 uint64_t ep_handle;
130 } ep_disconnect;
131 struct msg_tgt_dscvr {
132 enum iscsi_tgt_dscvr type;
133 uint32_t host_no;
135 * enable = 1 to establish a new connection
136 * with the server. enable = 0 to disconnect
137 * from the server. Used primarily to switch
138 * from one iSNS server to another.
140 uint32_t enable;
141 } tgt_dscvr;
142 struct msg_set_host_param {
143 uint32_t host_no;
144 uint32_t param; /* enum iscsi_host_param */
145 uint32_t len;
146 } set_host_param;
147 } u;
148 union {
149 /* messages k -> u */
150 int retcode;
151 struct msg_create_session_ret {
152 uint32_t sid;
153 uint32_t host_no;
154 } c_session_ret;
155 struct msg_create_conn_ret {
156 uint32_t sid;
157 uint32_t cid;
158 } c_conn_ret;
159 struct msg_recv_req {
160 uint32_t sid;
161 uint32_t cid;
162 uint64_t recv_handle;
163 } recv_req;
164 struct msg_conn_error {
165 uint32_t sid;
166 uint32_t cid;
167 uint32_t error; /* enum iscsi_err */
168 } connerror;
169 struct msg_session_destroyed {
170 uint32_t host_no;
171 uint32_t sid;
172 } d_session;
173 struct msg_transport_connect_ret {
174 uint64_t handle;
175 } ep_connect_ret;
176 } r;
177 } __attribute__ ((aligned (sizeof(uint64_t))));
180 * Common error codes
182 enum iscsi_err {
183 ISCSI_OK = 0,
185 ISCSI_ERR_DATASN = ISCSI_ERR_BASE + 1,
186 ISCSI_ERR_DATA_OFFSET = ISCSI_ERR_BASE + 2,
187 ISCSI_ERR_MAX_CMDSN = ISCSI_ERR_BASE + 3,
188 ISCSI_ERR_EXP_CMDSN = ISCSI_ERR_BASE + 4,
189 ISCSI_ERR_BAD_OPCODE = ISCSI_ERR_BASE + 5,
190 ISCSI_ERR_DATALEN = ISCSI_ERR_BASE + 6,
191 ISCSI_ERR_AHSLEN = ISCSI_ERR_BASE + 7,
192 ISCSI_ERR_PROTO = ISCSI_ERR_BASE + 8,
193 ISCSI_ERR_LUN = ISCSI_ERR_BASE + 9,
194 ISCSI_ERR_BAD_ITT = ISCSI_ERR_BASE + 10,
195 ISCSI_ERR_CONN_FAILED = ISCSI_ERR_BASE + 11,
196 ISCSI_ERR_R2TSN = ISCSI_ERR_BASE + 12,
197 ISCSI_ERR_SESSION_FAILED = ISCSI_ERR_BASE + 13,
198 ISCSI_ERR_HDR_DGST = ISCSI_ERR_BASE + 14,
199 ISCSI_ERR_DATA_DGST = ISCSI_ERR_BASE + 15,
200 ISCSI_ERR_PARAM_NOT_FOUND = ISCSI_ERR_BASE + 16,
201 ISCSI_ERR_NO_SCSI_CMD = ISCSI_ERR_BASE + 17,
205 * iSCSI Parameters (RFC3720)
207 enum iscsi_param {
208 /* passed in using netlink set param */
209 ISCSI_PARAM_MAX_RECV_DLENGTH,
210 ISCSI_PARAM_MAX_XMIT_DLENGTH,
211 ISCSI_PARAM_HDRDGST_EN,
212 ISCSI_PARAM_DATADGST_EN,
213 ISCSI_PARAM_INITIAL_R2T_EN,
214 ISCSI_PARAM_MAX_R2T,
215 ISCSI_PARAM_IMM_DATA_EN,
216 ISCSI_PARAM_FIRST_BURST,
217 ISCSI_PARAM_MAX_BURST,
218 ISCSI_PARAM_PDU_INORDER_EN,
219 ISCSI_PARAM_DATASEQ_INORDER_EN,
220 ISCSI_PARAM_ERL,
221 ISCSI_PARAM_IFMARKER_EN,
222 ISCSI_PARAM_OFMARKER_EN,
223 ISCSI_PARAM_EXP_STATSN,
224 ISCSI_PARAM_TARGET_NAME,
225 ISCSI_PARAM_TPGT,
226 ISCSI_PARAM_PERSISTENT_ADDRESS,
227 ISCSI_PARAM_PERSISTENT_PORT,
228 ISCSI_PARAM_SESS_RECOVERY_TMO,
230 /* pased in through bind conn using transport_fd */
231 ISCSI_PARAM_CONN_PORT,
232 ISCSI_PARAM_CONN_ADDRESS,
234 ISCSI_PARAM_USERNAME,
235 ISCSI_PARAM_USERNAME_IN,
236 ISCSI_PARAM_PASSWORD,
237 ISCSI_PARAM_PASSWORD_IN,
239 /* must always be last */
240 ISCSI_PARAM_MAX,
243 #define ISCSI_MAX_RECV_DLENGTH (1 << ISCSI_PARAM_MAX_RECV_DLENGTH)
244 #define ISCSI_MAX_XMIT_DLENGTH (1 << ISCSI_PARAM_MAX_XMIT_DLENGTH)
245 #define ISCSI_HDRDGST_EN (1 << ISCSI_PARAM_HDRDGST_EN)
246 #define ISCSI_DATADGST_EN (1 << ISCSI_PARAM_DATADGST_EN)
247 #define ISCSI_INITIAL_R2T_EN (1 << ISCSI_PARAM_INITIAL_R2T_EN)
248 #define ISCSI_MAX_R2T (1 << ISCSI_PARAM_MAX_R2T)
249 #define ISCSI_IMM_DATA_EN (1 << ISCSI_PARAM_IMM_DATA_EN)
250 #define ISCSI_FIRST_BURST (1 << ISCSI_PARAM_FIRST_BURST)
251 #define ISCSI_MAX_BURST (1 << ISCSI_PARAM_MAX_BURST)
252 #define ISCSI_PDU_INORDER_EN (1 << ISCSI_PARAM_PDU_INORDER_EN)
253 #define ISCSI_DATASEQ_INORDER_EN (1 << ISCSI_PARAM_DATASEQ_INORDER_EN)
254 #define ISCSI_ERL (1 << ISCSI_PARAM_ERL)
255 #define ISCSI_IFMARKER_EN (1 << ISCSI_PARAM_IFMARKER_EN)
256 #define ISCSI_OFMARKER_EN (1 << ISCSI_PARAM_OFMARKER_EN)
257 #define ISCSI_EXP_STATSN (1 << ISCSI_PARAM_EXP_STATSN)
258 #define ISCSI_TARGET_NAME (1 << ISCSI_PARAM_TARGET_NAME)
259 #define ISCSI_TPGT (1 << ISCSI_PARAM_TPGT)
260 #define ISCSI_PERSISTENT_ADDRESS (1 << ISCSI_PARAM_PERSISTENT_ADDRESS)
261 #define ISCSI_PERSISTENT_PORT (1 << ISCSI_PARAM_PERSISTENT_PORT)
262 #define ISCSI_SESS_RECOVERY_TMO (1 << ISCSI_PARAM_SESS_RECOVERY_TMO)
263 #define ISCSI_CONN_PORT (1 << ISCSI_PARAM_CONN_PORT)
264 #define ISCSI_CONN_ADDRESS (1 << ISCSI_PARAM_CONN_ADDRESS)
265 #define ISCSI_USERNAME (1 << ISCSI_PARAM_USERNAME)
266 #define ISCSI_USERNAME_IN (1 << ISCSI_PARAM_USERNAME_IN)
267 #define ISCSI_PASSWORD (1 << ISCSI_PARAM_PASSWORD)
268 #define ISCSI_PASSWORD_IN (1 << ISCSI_PARAM_PASSWORD_IN)
270 /* iSCSI HBA params */
271 enum iscsi_host_param {
272 ISCSI_HOST_PARAM_HWADDRESS,
273 ISCSI_HOST_PARAM_INITIATOR_NAME,
274 ISCSI_HOST_PARAM_NETDEV_NAME,
275 ISCSI_HOST_PARAM_IPADDRESS,
276 ISCSI_HOST_PARAM_MAX,
279 #define ISCSI_HOST_HWADDRESS (1 << ISCSI_HOST_PARAM_HWADDRESS)
280 #define ISCSI_HOST_INITIATOR_NAME (1 << ISCSI_HOST_PARAM_INITIATOR_NAME)
281 #define ISCSI_HOST_NETDEV_NAME (1 << ISCSI_HOST_PARAM_NETDEV_NAME)
282 #define ISCSI_HOST_IPADDRESS (1 << ISCSI_HOST_PARAM_IPADDRESS)
284 #define iscsi_ptr(_handle) ((void*)(unsigned long)_handle)
285 #define iscsi_handle(_ptr) ((uint64_t)(unsigned long)_ptr)
286 #define hostdata_session(_hostdata) (iscsi_ptr(*(unsigned long *)_hostdata))
289 * iscsi_hostdata - get LLD hostdata from scsi_host
290 * @_hostdata: pointer to scsi host's hostdata
292 #define iscsi_hostdata(_hostdata) ((void*)_hostdata + sizeof(unsigned long))
295 * These flags presents iSCSI Data-Path capabilities.
297 #define CAP_RECOVERY_L0 0x1
298 #define CAP_RECOVERY_L1 0x2
299 #define CAP_RECOVERY_L2 0x4
300 #define CAP_MULTI_R2T 0x8
301 #define CAP_HDRDGST 0x10
302 #define CAP_DATADGST 0x20
303 #define CAP_MULTI_CONN 0x40
304 #define CAP_TEXT_NEGO 0x80
305 #define CAP_MARKERS 0x100
306 #define CAP_FW_DB 0x200
307 #define CAP_SENDTARGETS_OFFLOAD 0x400
308 #define CAP_DATA_PATH_OFFLOAD 0x800
311 * These flags describes reason of stop_conn() call
313 #define STOP_CONN_TERM 0x1
314 #define STOP_CONN_SUSPEND 0x2
315 #define STOP_CONN_RECOVER 0x3
317 #define ISCSI_STATS_CUSTOM_MAX 32
318 #define ISCSI_STATS_CUSTOM_DESC_MAX 64
319 struct iscsi_stats_custom {
320 char desc[ISCSI_STATS_CUSTOM_DESC_MAX];
321 uint64_t value;
325 * struct iscsi_stats - iSCSI Statistics (iSCSI MIB)
327 * Note: this structure contains counters collected on per-connection basis.
329 struct iscsi_stats {
330 /* octets */
331 uint64_t txdata_octets;
332 uint64_t rxdata_octets;
334 /* xmit pdus */
335 uint32_t noptx_pdus;
336 uint32_t scsicmd_pdus;
337 uint32_t tmfcmd_pdus;
338 uint32_t login_pdus;
339 uint32_t text_pdus;
340 uint32_t dataout_pdus;
341 uint32_t logout_pdus;
342 uint32_t snack_pdus;
344 /* recv pdus */
345 uint32_t noprx_pdus;
346 uint32_t scsirsp_pdus;
347 uint32_t tmfrsp_pdus;
348 uint32_t textrsp_pdus;
349 uint32_t datain_pdus;
350 uint32_t logoutrsp_pdus;
351 uint32_t r2t_pdus;
352 uint32_t async_pdus;
353 uint32_t rjt_pdus;
355 /* errors */
356 uint32_t digest_err;
357 uint32_t timeout_err;
360 * iSCSI Custom Statistics support, i.e. Transport could
361 * extend existing MIB statistics with its own specific statistics
362 * up to ISCSI_STATS_CUSTOM_MAX
364 uint32_t custom_length;
365 struct iscsi_stats_custom custom[0]
366 __attribute__ ((aligned (sizeof(uint64_t))));
369 #endif