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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 #include <linux/in.h>
26 #include <linux/in6.h>
27
28 #define ISCSI_NL_GRP_ISCSID     1
29 #define ISCSI_NL_GRP_UIP        2
30
31 #define UEVENT_BASE                     10
32 #define KEVENT_BASE                     100
33 #define ISCSI_ERR_BASE                  1000
34
35 enum iscsi_uevent_e {
36         ISCSI_UEVENT_UNKNOWN            = 0,
37
38         /* down events */
39         ISCSI_UEVENT_CREATE_SESSION     = UEVENT_BASE + 1,
40         ISCSI_UEVENT_DESTROY_SESSION    = UEVENT_BASE + 2,
41         ISCSI_UEVENT_CREATE_CONN        = UEVENT_BASE + 3,
42         ISCSI_UEVENT_DESTROY_CONN       = UEVENT_BASE + 4,
43         ISCSI_UEVENT_BIND_CONN          = UEVENT_BASE + 5,
44         ISCSI_UEVENT_SET_PARAM          = UEVENT_BASE + 6,
45         ISCSI_UEVENT_START_CONN         = UEVENT_BASE + 7,
46         ISCSI_UEVENT_STOP_CONN          = UEVENT_BASE + 8,
47         ISCSI_UEVENT_SEND_PDU           = UEVENT_BASE + 9,
48         ISCSI_UEVENT_GET_STATS          = UEVENT_BASE + 10,
49         ISCSI_UEVENT_GET_PARAM          = UEVENT_BASE + 11,
50
51         ISCSI_UEVENT_TRANSPORT_EP_CONNECT       = UEVENT_BASE + 12,
52         ISCSI_UEVENT_TRANSPORT_EP_POLL          = UEVENT_BASE + 13,
53         ISCSI_UEVENT_TRANSPORT_EP_DISCONNECT    = UEVENT_BASE + 14,
54
55         ISCSI_UEVENT_TGT_DSCVR          = UEVENT_BASE + 15,
56         ISCSI_UEVENT_SET_HOST_PARAM     = UEVENT_BASE + 16,
57         ISCSI_UEVENT_UNBIND_SESSION     = UEVENT_BASE + 17,
58         ISCSI_UEVENT_CREATE_BOUND_SESSION               = UEVENT_BASE + 18,
59         ISCSI_UEVENT_TRANSPORT_EP_CONNECT_THROUGH_HOST  = UEVENT_BASE + 19,
60
61         ISCSI_UEVENT_PATH_UPDATE        = UEVENT_BASE + 20,
62         ISCSI_UEVENT_SET_IFACE_PARAMS   = UEVENT_BASE + 21,
63         ISCSI_UEVENT_PING               = UEVENT_BASE + 22,
64         ISCSI_UEVENT_GET_CHAP           = UEVENT_BASE + 23,
65         ISCSI_UEVENT_DELETE_CHAP        = UEVENT_BASE + 24,
66         ISCSI_UEVENT_SET_FLASHNODE_PARAMS       = UEVENT_BASE + 25,
67         ISCSI_UEVENT_NEW_FLASHNODE      = UEVENT_BASE + 26,
68         ISCSI_UEVENT_DEL_FLASHNODE      = UEVENT_BASE + 27,
69         ISCSI_UEVENT_LOGIN_FLASHNODE    = UEVENT_BASE + 28,
70         ISCSI_UEVENT_LOGOUT_FLASHNODE   = UEVENT_BASE + 29,
71         ISCSI_UEVENT_LOGOUT_FLASHNODE_SID       = UEVENT_BASE + 30,
72         ISCSI_UEVENT_SET_CHAP           = UEVENT_BASE + 31,
73         ISCSI_UEVENT_GET_HOST_STATS     = UEVENT_BASE + 32,
74
75         /* up events */
76         ISCSI_KEVENT_RECV_PDU           = KEVENT_BASE + 1,
77         ISCSI_KEVENT_CONN_ERROR         = KEVENT_BASE + 2,
78         ISCSI_KEVENT_IF_ERROR           = KEVENT_BASE + 3,
79         ISCSI_KEVENT_DESTROY_SESSION    = KEVENT_BASE + 4,
80         ISCSI_KEVENT_UNBIND_SESSION     = KEVENT_BASE + 5,
81         ISCSI_KEVENT_CREATE_SESSION     = KEVENT_BASE + 6,
82
83         ISCSI_KEVENT_PATH_REQ           = KEVENT_BASE + 7,
84         ISCSI_KEVENT_IF_DOWN            = KEVENT_BASE + 8,
85         ISCSI_KEVENT_CONN_LOGIN_STATE   = KEVENT_BASE + 9,
86         ISCSI_KEVENT_HOST_EVENT         = KEVENT_BASE + 10,
87         ISCSI_KEVENT_PING_COMP          = KEVENT_BASE + 11,
88 };
89
90 enum iscsi_tgt_dscvr {
91         ISCSI_TGT_DSCVR_SEND_TARGETS    = 1,
92         ISCSI_TGT_DSCVR_ISNS            = 2,
93         ISCSI_TGT_DSCVR_SLP             = 3,
94 };
95
96 enum iscsi_host_event_code {
97         ISCSI_EVENT_LINKUP              = 1,
98         ISCSI_EVENT_LINKDOWN,
99         /* must always be last */
100         ISCSI_EVENT_MAX,
101 };
102
103 struct iscsi_uevent {
104         uint32_t type; /* k/u events type */
105         uint32_t iferror; /* carries interface or resource errors */
106         uint64_t transport_handle;
107
108         union {
109                 /* messages u -> k */
110                 struct msg_create_session {
111                         uint32_t        initial_cmdsn;
112                         uint16_t        cmds_max;
113                         uint16_t        queue_depth;
114                 } c_session;
115                 struct msg_create_bound_session {
116                         uint64_t        ep_handle;
117                         uint32_t        initial_cmdsn;
118                         uint16_t        cmds_max;
119                         uint16_t        queue_depth;
120                 } c_bound_session;
121                 struct msg_destroy_session {
122                         uint32_t        sid;
123                 } d_session;
124                 struct msg_create_conn {
125                         uint32_t        sid;
126                         uint32_t        cid;
127                 } c_conn;
128                 struct msg_bind_conn {
129                         uint32_t        sid;
130                         uint32_t        cid;
131                         uint64_t        transport_eph;
132                         uint32_t        is_leading;
133                 } b_conn;
134                 struct msg_destroy_conn {
135                         uint32_t        sid;
136                         uint32_t        cid;
137                 } d_conn;
138                 struct msg_send_pdu {
139                         uint32_t        sid;
140                         uint32_t        cid;
141                         uint32_t        hdr_size;
142                         uint32_t        data_size;
143                 } send_pdu;
144                 struct msg_set_param {
145                         uint32_t        sid;
146                         uint32_t        cid;
147                         uint32_t        param; /* enum iscsi_param */
148                         uint32_t        len;
149                 } set_param;
150                 struct msg_start_conn {
151                         uint32_t        sid;
152                         uint32_t        cid;
153                 } start_conn;
154                 struct msg_stop_conn {
155                         uint32_t        sid;
156                         uint32_t        cid;
157                         uint64_t        conn_handle;
158                         uint32_t        flag;
159                 } stop_conn;
160                 struct msg_get_stats {
161                         uint32_t        sid;
162                         uint32_t        cid;
163                 } get_stats;
164                 struct msg_transport_connect {
165                         uint32_t        non_blocking;
166                 } ep_connect;
167                 struct msg_transport_connect_through_host {
168                         uint32_t        host_no;
169                         uint32_t        non_blocking;
170                 } ep_connect_through_host;
171                 struct msg_transport_poll {
172                         uint64_t        ep_handle;
173                         uint32_t        timeout_ms;
174                 } ep_poll;
175                 struct msg_transport_disconnect {
176                         uint64_t        ep_handle;
177                 } ep_disconnect;
178                 struct msg_tgt_dscvr {
179                         enum iscsi_tgt_dscvr    type;
180                         uint32_t        host_no;
181                         /*
182                          * enable = 1 to establish a new connection
183                          * with the server. enable = 0 to disconnect
184                          * from the server. Used primarily to switch
185                          * from one iSNS server to another.
186                          */
187                         uint32_t        enable;
188                 } tgt_dscvr;
189                 struct msg_set_host_param {
190                         uint32_t        host_no;
191                         uint32_t        param; /* enum iscsi_host_param */
192                         uint32_t        len;
193                 } set_host_param;
194                 struct msg_set_path {
195                         uint32_t        host_no;
196                 } set_path;
197                 struct msg_set_iface_params {
198                         uint32_t        host_no;
199                         uint32_t        count;
200                 } set_iface_params;
201                 struct msg_iscsi_ping {
202                         uint32_t        host_no;
203                         uint32_t        iface_num;
204                         uint32_t        iface_type;
205                         uint32_t        payload_size;
206                         uint32_t        pid;    /* unique ping id associated
207                                                    with each ping request */
208                 } iscsi_ping;
209                 struct msg_get_chap {
210                         uint32_t        host_no;
211                         uint32_t        num_entries; /* number of CHAP entries
212                                                       * on request, number of
213                                                       * valid CHAP entries on
214                                                       * response */
215                         uint16_t        chap_tbl_idx;
216                 } get_chap;
217                 struct msg_delete_chap {
218                        uint32_t        host_no;
219                        uint16_t        chap_tbl_idx;
220                 } delete_chap;
221                 struct msg_set_flashnode_param {
222                         uint32_t        host_no;
223                         uint32_t        flashnode_idx;
224                         uint32_t        count;
225                 } set_flashnode;
226                 struct msg_new_flashnode {
227                         uint32_t        host_no;
228                         uint32_t        len;
229                 } new_flashnode;
230                 struct msg_del_flashnode {
231                         uint32_t        host_no;
232                         uint32_t        flashnode_idx;
233                 } del_flashnode;
234                 struct msg_login_flashnode {
235                         uint32_t        host_no;
236                         uint32_t        flashnode_idx;
237                 } login_flashnode;
238                 struct msg_logout_flashnode {
239                         uint32_t        host_no;
240                         uint32_t        flashnode_idx;
241                 } logout_flashnode;
242                 struct msg_logout_flashnode_sid {
243                         uint32_t        host_no;
244                         uint32_t        sid;
245                 } logout_flashnode_sid;
246                 struct msg_get_host_stats {
247                         uint32_t host_no;
248                 } get_host_stats;
249         } u;
250         union {
251                 /* messages k -> u */
252                 int                     retcode;
253                 struct msg_create_session_ret {
254                         uint32_t        sid;
255                         uint32_t        host_no;
256                 } c_session_ret;
257                 struct msg_create_conn_ret {
258                         uint32_t        sid;
259                         uint32_t        cid;
260                 } c_conn_ret;
261                 struct msg_unbind_session {
262                         uint32_t        sid;
263                         uint32_t        host_no;
264                 } unbind_session;
265                 struct msg_recv_req {
266                         uint32_t        sid;
267                         uint32_t        cid;
268                         uint64_t        recv_handle;
269                 } recv_req;
270                 struct msg_conn_login {
271                         uint32_t        sid;
272                         uint32_t        cid;
273                         uint32_t        state; /* enum iscsi_conn_state */
274                 } conn_login;
275                 struct msg_conn_error {
276                         uint32_t        sid;
277                         uint32_t        cid;
278                         uint32_t        error; /* enum iscsi_err */
279                 } connerror;
280                 struct msg_session_destroyed {
281                         uint32_t        host_no;
282                         uint32_t        sid;
283                 } d_session;
284                 struct msg_transport_connect_ret {
285                         uint64_t        handle;
286                 } ep_connect_ret;
287                 struct msg_req_path {
288                         uint32_t        host_no;
289                 } req_path;
290                 struct msg_notify_if_down {
291                         uint32_t        host_no;
292                 } notify_if_down;
293                 struct msg_host_event {
294                         uint32_t        host_no;
295                         uint32_t        data_size;
296                         enum iscsi_host_event_code code;
297                 } host_event;
298                 struct msg_ping_comp {
299                         uint32_t        host_no;
300                         uint32_t        status; /* enum
301                                                  * iscsi_ping_status_code */
302                         uint32_t        pid;    /* unique ping id associated
303                                                    with each ping request */
304                         uint32_t        data_size;
305                 } ping_comp;
306                 struct msg_new_flashnode_ret {
307                         uint32_t        flashnode_idx;
308                 } new_flashnode_ret;
309         } r;
310 } __attribute__ ((aligned (sizeof(uint64_t))));
311
312 enum iscsi_param_type {
313         ISCSI_PARAM,            /* iscsi_param (session, conn, target, LU) */
314         ISCSI_HOST_PARAM,       /* iscsi_host_param */
315         ISCSI_NET_PARAM,        /* iscsi_net_param */
316         ISCSI_FLASHNODE_PARAM,  /* iscsi_flashnode_param */
317         ISCSI_CHAP_PARAM,       /* iscsi_chap_param */
318         ISCSI_IFACE_PARAM,      /* iscsi_iface_param */
319 };
320
321 /* structure for minimalist usecase */
322 struct iscsi_param_info {
323         uint32_t len;           /* Actual length of the param value */
324         uint16_t param;         /* iscsi param */
325         uint8_t value[0];       /* length sized value follows */
326 } __packed;
327
328 struct iscsi_iface_param_info {
329         uint32_t iface_num;     /* iface number, 0 - n */
330         uint32_t len;           /* Actual length of the param */
331         uint16_t param;         /* iscsi param value */
332         uint8_t iface_type;     /* IPv4 or IPv6 */
333         uint8_t param_type;     /* iscsi_param_type */
334         uint8_t value[0];       /* length sized value follows */
335 } __packed;
336
337 /*
338  * To keep the struct iscsi_uevent size the same for userspace code
339  * compatibility, the main structure for ISCSI_UEVENT_PATH_UPDATE and
340  * ISCSI_KEVENT_PATH_REQ is defined separately and comes after the
341  * struct iscsi_uevent in the NETLINK_ISCSI message.
342  */
343 struct iscsi_path {
344         uint64_t        handle;
345         uint8_t         mac_addr[6];
346         uint8_t         mac_addr_old[6];
347         uint32_t        ip_addr_len;    /* 4 or 16 */
348         union {
349                 struct in_addr  v4_addr;
350                 struct in6_addr v6_addr;
351         } src;
352         union {
353                 struct in_addr  v4_addr;
354                 struct in6_addr v6_addr;
355         } dst;
356         uint16_t        vlan_id;
357         uint16_t        pmtu;
358 } __attribute__ ((aligned (sizeof(uint64_t))));
359
360 /* iscsi iface enabled/disabled setting */
361 #define ISCSI_IFACE_DISABLE     0x01
362 #define ISCSI_IFACE_ENABLE      0x02
363
364 /* ipv4 bootproto */
365 #define ISCSI_BOOTPROTO_STATIC          0x01
366 #define ISCSI_BOOTPROTO_DHCP            0x02
367
368 /* ipv6 addr autoconfig type */
369 #define ISCSI_IPV6_AUTOCFG_DISABLE              0x01
370 #define ISCSI_IPV6_AUTOCFG_ND_ENABLE            0x02
371 #define ISCSI_IPV6_AUTOCFG_DHCPV6_ENABLE        0x03
372
373 /* ipv6 link local addr type */
374 #define ISCSI_IPV6_LINKLOCAL_AUTOCFG_ENABLE     0x01
375 #define ISCSI_IPV6_LINKLOCAL_AUTOCFG_DISABLE    0x02
376
377 /* ipv6 router addr type */
378 #define ISCSI_IPV6_ROUTER_AUTOCFG_ENABLE        0x01
379 #define ISCSI_IPV6_ROUTER_AUTOCFG_DISABLE       0x02
380
381 #define ISCSI_IFACE_TYPE_IPV4           0x01
382 #define ISCSI_IFACE_TYPE_IPV6           0x02
383
384 #define ISCSI_MAX_VLAN_ID               4095
385 #define ISCSI_MAX_VLAN_PRIORITY         7
386
387 /* iscsi vlan enable/disabled setting */
388 #define ISCSI_VLAN_DISABLE      0x01
389 #define ISCSI_VLAN_ENABLE       0x02
390
391 /* iscsi generic enable/disabled setting for various features */
392 #define ISCSI_NET_PARAM_DISABLE         0x01
393 #define ISCSI_NET_PARAM_ENABLE          0x02
394
395 /* iSCSI network params */
396 enum iscsi_net_param {
397         ISCSI_NET_PARAM_IPV4_ADDR               = 1,
398         ISCSI_NET_PARAM_IPV4_SUBNET,
399         ISCSI_NET_PARAM_IPV4_GW,
400         ISCSI_NET_PARAM_IPV4_BOOTPROTO,
401         ISCSI_NET_PARAM_MAC,
402         ISCSI_NET_PARAM_IPV6_LINKLOCAL,
403         ISCSI_NET_PARAM_IPV6_ADDR,
404         ISCSI_NET_PARAM_IPV6_ROUTER,
405         ISCSI_NET_PARAM_IPV6_ADDR_AUTOCFG,
406         ISCSI_NET_PARAM_IPV6_LINKLOCAL_AUTOCFG,
407         ISCSI_NET_PARAM_IPV6_ROUTER_AUTOCFG,
408         ISCSI_NET_PARAM_IFACE_ENABLE,
409         ISCSI_NET_PARAM_VLAN_ID,
410         ISCSI_NET_PARAM_VLAN_PRIORITY,
411         ISCSI_NET_PARAM_VLAN_ENABLED,
412         ISCSI_NET_PARAM_VLAN_TAG,
413         ISCSI_NET_PARAM_IFACE_TYPE,
414         ISCSI_NET_PARAM_IFACE_NAME,
415         ISCSI_NET_PARAM_MTU,
416         ISCSI_NET_PARAM_PORT,
417         ISCSI_NET_PARAM_IPADDR_STATE,
418         ISCSI_NET_PARAM_IPV6_LINKLOCAL_STATE,
419         ISCSI_NET_PARAM_IPV6_ROUTER_STATE,
420         ISCSI_NET_PARAM_DELAYED_ACK_EN,
421         ISCSI_NET_PARAM_TCP_NAGLE_DISABLE,
422         ISCSI_NET_PARAM_TCP_WSF_DISABLE,
423         ISCSI_NET_PARAM_TCP_WSF,
424         ISCSI_NET_PARAM_TCP_TIMER_SCALE,
425         ISCSI_NET_PARAM_TCP_TIMESTAMP_EN,
426         ISCSI_NET_PARAM_CACHE_ID,
427         ISCSI_NET_PARAM_IPV4_DHCP_DNS_ADDR_EN,
428         ISCSI_NET_PARAM_IPV4_DHCP_SLP_DA_EN,
429         ISCSI_NET_PARAM_IPV4_TOS_EN,
430         ISCSI_NET_PARAM_IPV4_TOS,
431         ISCSI_NET_PARAM_IPV4_GRAT_ARP_EN,
432         ISCSI_NET_PARAM_IPV4_DHCP_ALT_CLIENT_ID_EN,
433         ISCSI_NET_PARAM_IPV4_DHCP_ALT_CLIENT_ID,
434         ISCSI_NET_PARAM_IPV4_DHCP_REQ_VENDOR_ID_EN,
435         ISCSI_NET_PARAM_IPV4_DHCP_USE_VENDOR_ID_EN,
436         ISCSI_NET_PARAM_IPV4_DHCP_VENDOR_ID,
437         ISCSI_NET_PARAM_IPV4_DHCP_LEARN_IQN_EN,
438         ISCSI_NET_PARAM_IPV4_FRAGMENT_DISABLE,
439         ISCSI_NET_PARAM_IPV4_IN_FORWARD_EN,
440         ISCSI_NET_PARAM_IPV4_TTL,
441         ISCSI_NET_PARAM_IPV6_GRAT_NEIGHBOR_ADV_EN,
442         ISCSI_NET_PARAM_IPV6_MLD_EN,
443         ISCSI_NET_PARAM_IPV6_FLOW_LABEL,
444         ISCSI_NET_PARAM_IPV6_TRAFFIC_CLASS,
445         ISCSI_NET_PARAM_IPV6_HOP_LIMIT,
446         ISCSI_NET_PARAM_IPV6_ND_REACHABLE_TMO,
447         ISCSI_NET_PARAM_IPV6_ND_REXMIT_TIME,
448         ISCSI_NET_PARAM_IPV6_ND_STALE_TMO,
449         ISCSI_NET_PARAM_IPV6_DUP_ADDR_DETECT_CNT,
450         ISCSI_NET_PARAM_IPV6_RTR_ADV_LINK_MTU,
451         ISCSI_NET_PARAM_REDIRECT_EN,
452 };
453
454 enum iscsi_ipaddress_state {
455         ISCSI_IPDDRESS_STATE_UNCONFIGURED,
456         ISCSI_IPDDRESS_STATE_ACQUIRING,
457         ISCSI_IPDDRESS_STATE_TENTATIVE,
458         ISCSI_IPDDRESS_STATE_VALID,
459         ISCSI_IPDDRESS_STATE_DISABLING,
460         ISCSI_IPDDRESS_STATE_INVALID,
461         ISCSI_IPDDRESS_STATE_DEPRECATED,
462 };
463
464 enum iscsi_router_state {
465         ISCSI_ROUTER_STATE_UNKNOWN,
466         ISCSI_ROUTER_STATE_ADVERTISED,
467         ISCSI_ROUTER_STATE_MANUAL,
468         ISCSI_ROUTER_STATE_STALE,
469 };
470
471 /* iSCSI specific settings params for iface */
472 enum iscsi_iface_param {
473         ISCSI_IFACE_PARAM_DEF_TASKMGMT_TMO,
474         ISCSI_IFACE_PARAM_HDRDGST_EN,
475         ISCSI_IFACE_PARAM_DATADGST_EN,
476         ISCSI_IFACE_PARAM_IMM_DATA_EN,
477         ISCSI_IFACE_PARAM_INITIAL_R2T_EN,
478         ISCSI_IFACE_PARAM_DATASEQ_INORDER_EN,
479         ISCSI_IFACE_PARAM_PDU_INORDER_EN,
480         ISCSI_IFACE_PARAM_ERL,
481         ISCSI_IFACE_PARAM_MAX_RECV_DLENGTH,
482         ISCSI_IFACE_PARAM_FIRST_BURST,
483         ISCSI_IFACE_PARAM_MAX_R2T,
484         ISCSI_IFACE_PARAM_MAX_BURST,
485         ISCSI_IFACE_PARAM_CHAP_AUTH_EN,
486         ISCSI_IFACE_PARAM_BIDI_CHAP_EN,
487         ISCSI_IFACE_PARAM_DISCOVERY_AUTH_OPTIONAL,
488         ISCSI_IFACE_PARAM_DISCOVERY_LOGOUT_EN,
489         ISCSI_IFACE_PARAM_STRICT_LOGIN_COMP_EN,
490         ISCSI_IFACE_PARAM_INITIATOR_NAME,
491 };
492
493 enum iscsi_conn_state {
494         ISCSI_CONN_STATE_FREE,
495         ISCSI_CONN_STATE_XPT_WAIT,
496         ISCSI_CONN_STATE_IN_LOGIN,
497         ISCSI_CONN_STATE_LOGGED_IN,
498         ISCSI_CONN_STATE_IN_LOGOUT,
499         ISCSI_CONN_STATE_LOGOUT_REQUESTED,
500         ISCSI_CONN_STATE_CLEANUP_WAIT,
501 };
502
503 /*
504  * Common error codes
505  */
506 enum iscsi_err {
507         ISCSI_OK                        = 0,
508
509         ISCSI_ERR_DATASN                = ISCSI_ERR_BASE + 1,
510         ISCSI_ERR_DATA_OFFSET           = ISCSI_ERR_BASE + 2,
511         ISCSI_ERR_MAX_CMDSN             = ISCSI_ERR_BASE + 3,
512         ISCSI_ERR_EXP_CMDSN             = ISCSI_ERR_BASE + 4,
513         ISCSI_ERR_BAD_OPCODE            = ISCSI_ERR_BASE + 5,
514         ISCSI_ERR_DATALEN               = ISCSI_ERR_BASE + 6,
515         ISCSI_ERR_AHSLEN                = ISCSI_ERR_BASE + 7,
516         ISCSI_ERR_PROTO                 = ISCSI_ERR_BASE + 8,
517         ISCSI_ERR_LUN                   = ISCSI_ERR_BASE + 9,
518         ISCSI_ERR_BAD_ITT               = ISCSI_ERR_BASE + 10,
519         ISCSI_ERR_CONN_FAILED           = ISCSI_ERR_BASE + 11,
520         ISCSI_ERR_R2TSN                 = ISCSI_ERR_BASE + 12,
521         ISCSI_ERR_SESSION_FAILED        = ISCSI_ERR_BASE + 13,
522         ISCSI_ERR_HDR_DGST              = ISCSI_ERR_BASE + 14,
523         ISCSI_ERR_DATA_DGST             = ISCSI_ERR_BASE + 15,
524         ISCSI_ERR_PARAM_NOT_FOUND       = ISCSI_ERR_BASE + 16,
525         ISCSI_ERR_NO_SCSI_CMD           = ISCSI_ERR_BASE + 17,
526         ISCSI_ERR_INVALID_HOST          = ISCSI_ERR_BASE + 18,
527         ISCSI_ERR_XMIT_FAILED           = ISCSI_ERR_BASE + 19,
528         ISCSI_ERR_TCP_CONN_CLOSE        = ISCSI_ERR_BASE + 20,
529         ISCSI_ERR_SCSI_EH_SESSION_RST   = ISCSI_ERR_BASE + 21,
530 };
531
532 /*
533  * iSCSI Parameters (RFC3720)
534  */
535 enum iscsi_param {
536         /* passed in using netlink set param */
537         ISCSI_PARAM_MAX_RECV_DLENGTH,
538         ISCSI_PARAM_MAX_XMIT_DLENGTH,
539         ISCSI_PARAM_HDRDGST_EN,
540         ISCSI_PARAM_DATADGST_EN,
541         ISCSI_PARAM_INITIAL_R2T_EN,
542         ISCSI_PARAM_MAX_R2T,
543         ISCSI_PARAM_IMM_DATA_EN,
544         ISCSI_PARAM_FIRST_BURST,
545         ISCSI_PARAM_MAX_BURST,
546         ISCSI_PARAM_PDU_INORDER_EN,
547         ISCSI_PARAM_DATASEQ_INORDER_EN,
548         ISCSI_PARAM_ERL,
549         ISCSI_PARAM_IFMARKER_EN,
550         ISCSI_PARAM_OFMARKER_EN,
551         ISCSI_PARAM_EXP_STATSN,
552         ISCSI_PARAM_TARGET_NAME,
553         ISCSI_PARAM_TPGT,
554         ISCSI_PARAM_PERSISTENT_ADDRESS,
555         ISCSI_PARAM_PERSISTENT_PORT,
556         ISCSI_PARAM_SESS_RECOVERY_TMO,
557
558         /* passed in through bind conn using transport_fd */
559         ISCSI_PARAM_CONN_PORT,
560         ISCSI_PARAM_CONN_ADDRESS,
561
562         ISCSI_PARAM_USERNAME,
563         ISCSI_PARAM_USERNAME_IN,
564         ISCSI_PARAM_PASSWORD,
565         ISCSI_PARAM_PASSWORD_IN,
566
567         ISCSI_PARAM_FAST_ABORT,
568         ISCSI_PARAM_ABORT_TMO,
569         ISCSI_PARAM_LU_RESET_TMO,
570         ISCSI_PARAM_HOST_RESET_TMO,
571
572         ISCSI_PARAM_PING_TMO,
573         ISCSI_PARAM_RECV_TMO,
574
575         ISCSI_PARAM_IFACE_NAME,
576         ISCSI_PARAM_ISID,
577         ISCSI_PARAM_INITIATOR_NAME,
578
579         ISCSI_PARAM_TGT_RESET_TMO,
580         ISCSI_PARAM_TARGET_ALIAS,
581
582         ISCSI_PARAM_CHAP_IN_IDX,
583         ISCSI_PARAM_CHAP_OUT_IDX,
584
585         ISCSI_PARAM_BOOT_ROOT,
586         ISCSI_PARAM_BOOT_NIC,
587         ISCSI_PARAM_BOOT_TARGET,
588
589         ISCSI_PARAM_AUTO_SND_TGT_DISABLE,
590         ISCSI_PARAM_DISCOVERY_SESS,
591         ISCSI_PARAM_PORTAL_TYPE,
592         ISCSI_PARAM_CHAP_AUTH_EN,
593         ISCSI_PARAM_DISCOVERY_LOGOUT_EN,
594         ISCSI_PARAM_BIDI_CHAP_EN,
595         ISCSI_PARAM_DISCOVERY_AUTH_OPTIONAL,
596
597         ISCSI_PARAM_DEF_TIME2WAIT,
598         ISCSI_PARAM_DEF_TIME2RETAIN,
599         ISCSI_PARAM_MAX_SEGMENT_SIZE,
600         ISCSI_PARAM_STATSN,
601         ISCSI_PARAM_KEEPALIVE_TMO,
602         ISCSI_PARAM_LOCAL_PORT,
603         ISCSI_PARAM_TSID,
604         ISCSI_PARAM_DEF_TASKMGMT_TMO,
605
606         ISCSI_PARAM_TCP_TIMESTAMP_STAT,
607         ISCSI_PARAM_TCP_WSF_DISABLE,
608         ISCSI_PARAM_TCP_NAGLE_DISABLE,
609         ISCSI_PARAM_TCP_TIMER_SCALE,
610         ISCSI_PARAM_TCP_TIMESTAMP_EN,
611         ISCSI_PARAM_TCP_XMIT_WSF,
612         ISCSI_PARAM_TCP_RECV_WSF,
613         ISCSI_PARAM_IP_FRAGMENT_DISABLE,
614         ISCSI_PARAM_IPV4_TOS,
615         ISCSI_PARAM_IPV6_TC,
616         ISCSI_PARAM_IPV6_FLOW_LABEL,
617         ISCSI_PARAM_IS_FW_ASSIGNED_IPV6,
618
619         ISCSI_PARAM_DISCOVERY_PARENT_IDX,
620         ISCSI_PARAM_DISCOVERY_PARENT_TYPE,
621         ISCSI_PARAM_LOCAL_IPADDR,
622         /* must always be last */
623         ISCSI_PARAM_MAX,
624 };
625
626 /* iSCSI HBA params */
627 enum iscsi_host_param {
628         ISCSI_HOST_PARAM_HWADDRESS,
629         ISCSI_HOST_PARAM_INITIATOR_NAME,
630         ISCSI_HOST_PARAM_NETDEV_NAME,
631         ISCSI_HOST_PARAM_IPADDRESS,
632         ISCSI_HOST_PARAM_PORT_STATE,
633         ISCSI_HOST_PARAM_PORT_SPEED,
634         ISCSI_HOST_PARAM_MAX,
635 };
636
637 /* portal type */
638 #define PORTAL_TYPE_IPV4        "ipv4"
639 #define PORTAL_TYPE_IPV6        "ipv6"
640
641 /* iSCSI Flash Target params */
642 enum iscsi_flashnode_param {
643         ISCSI_FLASHNODE_IS_FW_ASSIGNED_IPV6,
644         ISCSI_FLASHNODE_PORTAL_TYPE,
645         ISCSI_FLASHNODE_AUTO_SND_TGT_DISABLE,
646         ISCSI_FLASHNODE_DISCOVERY_SESS,
647         ISCSI_FLASHNODE_ENTRY_EN,
648         ISCSI_FLASHNODE_HDR_DGST_EN,
649         ISCSI_FLASHNODE_DATA_DGST_EN,
650         ISCSI_FLASHNODE_IMM_DATA_EN,
651         ISCSI_FLASHNODE_INITIAL_R2T_EN,
652         ISCSI_FLASHNODE_DATASEQ_INORDER,
653         ISCSI_FLASHNODE_PDU_INORDER,
654         ISCSI_FLASHNODE_CHAP_AUTH_EN,
655         ISCSI_FLASHNODE_SNACK_REQ_EN,
656         ISCSI_FLASHNODE_DISCOVERY_LOGOUT_EN,
657         ISCSI_FLASHNODE_BIDI_CHAP_EN,
658         /* make authentication for discovery sessions optional */
659         ISCSI_FLASHNODE_DISCOVERY_AUTH_OPTIONAL,
660         ISCSI_FLASHNODE_ERL,
661         ISCSI_FLASHNODE_TCP_TIMESTAMP_STAT,
662         ISCSI_FLASHNODE_TCP_NAGLE_DISABLE,
663         ISCSI_FLASHNODE_TCP_WSF_DISABLE,
664         ISCSI_FLASHNODE_TCP_TIMER_SCALE,
665         ISCSI_FLASHNODE_TCP_TIMESTAMP_EN,
666         ISCSI_FLASHNODE_IP_FRAG_DISABLE,
667         ISCSI_FLASHNODE_MAX_RECV_DLENGTH,
668         ISCSI_FLASHNODE_MAX_XMIT_DLENGTH,
669         ISCSI_FLASHNODE_FIRST_BURST,
670         ISCSI_FLASHNODE_DEF_TIME2WAIT,
671         ISCSI_FLASHNODE_DEF_TIME2RETAIN,
672         ISCSI_FLASHNODE_MAX_R2T,
673         ISCSI_FLASHNODE_KEEPALIVE_TMO,
674         ISCSI_FLASHNODE_ISID,
675         ISCSI_FLASHNODE_TSID,
676         ISCSI_FLASHNODE_PORT,
677         ISCSI_FLASHNODE_MAX_BURST,
678         ISCSI_FLASHNODE_DEF_TASKMGMT_TMO,
679         ISCSI_FLASHNODE_IPADDR,
680         ISCSI_FLASHNODE_ALIAS,
681         ISCSI_FLASHNODE_REDIRECT_IPADDR,
682         ISCSI_FLASHNODE_MAX_SEGMENT_SIZE,
683         ISCSI_FLASHNODE_LOCAL_PORT,
684         ISCSI_FLASHNODE_IPV4_TOS,
685         ISCSI_FLASHNODE_IPV6_TC,
686         ISCSI_FLASHNODE_IPV6_FLOW_LABEL,
687         ISCSI_FLASHNODE_NAME,
688         ISCSI_FLASHNODE_TPGT,
689         ISCSI_FLASHNODE_LINK_LOCAL_IPV6,
690         ISCSI_FLASHNODE_DISCOVERY_PARENT_IDX,
691         ISCSI_FLASHNODE_DISCOVERY_PARENT_TYPE,
692         ISCSI_FLASHNODE_TCP_XMIT_WSF,
693         ISCSI_FLASHNODE_TCP_RECV_WSF,
694         ISCSI_FLASHNODE_CHAP_IN_IDX,
695         ISCSI_FLASHNODE_CHAP_OUT_IDX,
696         ISCSI_FLASHNODE_USERNAME,
697         ISCSI_FLASHNODE_USERNAME_IN,
698         ISCSI_FLASHNODE_PASSWORD,
699         ISCSI_FLASHNODE_PASSWORD_IN,
700         ISCSI_FLASHNODE_STATSN,
701         ISCSI_FLASHNODE_EXP_STATSN,
702         ISCSI_FLASHNODE_IS_BOOT_TGT,
703
704         ISCSI_FLASHNODE_MAX,
705 };
706
707 struct iscsi_flashnode_param_info {
708         uint32_t len;           /* Actual length of the param */
709         uint16_t param;         /* iscsi param value */
710         uint8_t value[0];       /* length sized value follows */
711 } __packed;
712
713 enum iscsi_discovery_parent_type {
714         ISCSI_DISC_PARENT_UNKNOWN       = 0x1,
715         ISCSI_DISC_PARENT_SENDTGT       = 0x2,
716         ISCSI_DISC_PARENT_ISNS          = 0x3,
717 };
718
719 /* iSCSI port Speed */
720 enum iscsi_port_speed {
721         ISCSI_PORT_SPEED_UNKNOWN        = 0x1,
722         ISCSI_PORT_SPEED_10MBPS         = 0x2,
723         ISCSI_PORT_SPEED_100MBPS        = 0x4,
724         ISCSI_PORT_SPEED_1GBPS          = 0x8,
725         ISCSI_PORT_SPEED_10GBPS         = 0x10,
726 };
727
728 /* iSCSI port state */
729 enum iscsi_port_state {
730         ISCSI_PORT_STATE_DOWN           = 0x1,
731         ISCSI_PORT_STATE_UP             = 0x2,
732 };
733
734 /* iSCSI PING status/error code */
735 enum iscsi_ping_status_code {
736         ISCSI_PING_SUCCESS                      = 0,
737         ISCSI_PING_FW_DISABLED                  = 0x1,
738         ISCSI_PING_IPADDR_INVALID               = 0x2,
739         ISCSI_PING_LINKLOCAL_IPV6_ADDR_INVALID  = 0x3,
740         ISCSI_PING_TIMEOUT                      = 0x4,
741         ISCSI_PING_INVALID_DEST_ADDR            = 0x5,
742         ISCSI_PING_OVERSIZE_PACKET              = 0x6,
743         ISCSI_PING_ICMP_ERROR                   = 0x7,
744         ISCSI_PING_MAX_REQ_EXCEEDED             = 0x8,
745         ISCSI_PING_NO_ARP_RECEIVED              = 0x9,
746 };
747
748 #define iscsi_ptr(_handle) ((void*)(unsigned long)_handle)
749 #define iscsi_handle(_ptr) ((uint64_t)(unsigned long)_ptr)
750
751 /*
752  * These flags presents iSCSI Data-Path capabilities.
753  */
754 #define CAP_RECOVERY_L0         0x1
755 #define CAP_RECOVERY_L1         0x2
756 #define CAP_RECOVERY_L2         0x4
757 #define CAP_MULTI_R2T           0x8
758 #define CAP_HDRDGST             0x10
759 #define CAP_DATADGST            0x20
760 #define CAP_MULTI_CONN          0x40
761 #define CAP_TEXT_NEGO           0x80
762 #define CAP_MARKERS             0x100
763 #define CAP_FW_DB               0x200
764 #define CAP_SENDTARGETS_OFFLOAD 0x400   /* offload discovery process */
765 #define CAP_DATA_PATH_OFFLOAD   0x800   /* offload entire IO path */
766 #define CAP_DIGEST_OFFLOAD      0x1000  /* offload hdr and data digests */
767 #define CAP_PADDING_OFFLOAD     0x2000  /* offload padding insertion, removal,
768                                          and verification */
769 #define CAP_LOGIN_OFFLOAD       0x4000  /* offload session login */
770
771 /*
772  * These flags describes reason of stop_conn() call
773  */
774 #define STOP_CONN_TERM          0x1
775 #define STOP_CONN_SUSPEND       0x2
776 #define STOP_CONN_RECOVER       0x3
777
778 #define ISCSI_STATS_CUSTOM_MAX          32
779 #define ISCSI_STATS_CUSTOM_DESC_MAX     64
780 struct iscsi_stats_custom {
781         char desc[ISCSI_STATS_CUSTOM_DESC_MAX];
782         uint64_t value;
783 };
784
785 /*
786  * struct iscsi_stats - iSCSI Statistics (iSCSI MIB)
787  *
788  * Note: this structure contains counters collected on per-connection basis.
789  */
790 struct iscsi_stats {
791         /* octets */
792         uint64_t txdata_octets;
793         uint64_t rxdata_octets;
794
795         /* xmit pdus */
796         uint32_t noptx_pdus;
797         uint32_t scsicmd_pdus;
798         uint32_t tmfcmd_pdus;
799         uint32_t login_pdus;
800         uint32_t text_pdus;
801         uint32_t dataout_pdus;
802         uint32_t logout_pdus;
803         uint32_t snack_pdus;
804
805         /* recv pdus */
806         uint32_t noprx_pdus;
807         uint32_t scsirsp_pdus;
808         uint32_t tmfrsp_pdus;
809         uint32_t textrsp_pdus;
810         uint32_t datain_pdus;
811         uint32_t logoutrsp_pdus;
812         uint32_t r2t_pdus;
813         uint32_t async_pdus;
814         uint32_t rjt_pdus;
815
816         /* errors */
817         uint32_t digest_err;
818         uint32_t timeout_err;
819
820         /*
821          * iSCSI Custom Statistics support, i.e. Transport could
822          * extend existing MIB statistics with its own specific statistics
823          * up to ISCSI_STATS_CUSTOM_MAX
824          */
825         uint32_t custom_length;
826         struct iscsi_stats_custom custom[0]
827                 __attribute__ ((aligned (sizeof(uint64_t))));
828 };
829
830 enum chap_type_e {
831         CHAP_TYPE_OUT,
832         CHAP_TYPE_IN,
833 };
834
835 enum iscsi_chap_param {
836         ISCSI_CHAP_PARAM_INDEX,
837         ISCSI_CHAP_PARAM_CHAP_TYPE,
838         ISCSI_CHAP_PARAM_USERNAME,
839         ISCSI_CHAP_PARAM_PASSWORD,
840         ISCSI_CHAP_PARAM_PASSWORD_LEN
841 };
842
843 #define ISCSI_CHAP_AUTH_NAME_MAX_LEN    256
844 #define ISCSI_CHAP_AUTH_SECRET_MAX_LEN  256
845 struct iscsi_chap_rec {
846         uint16_t chap_tbl_idx;
847         enum chap_type_e chap_type;
848         char username[ISCSI_CHAP_AUTH_NAME_MAX_LEN];
849         uint8_t password[ISCSI_CHAP_AUTH_SECRET_MAX_LEN];
850         uint8_t password_length;
851 };
852
853 #define ISCSI_HOST_STATS_CUSTOM_MAX             32
854 #define ISCSI_HOST_STATS_CUSTOM_DESC_MAX        64
855 struct iscsi_host_stats_custom {
856         char desc[ISCSI_HOST_STATS_CUSTOM_DESC_MAX];
857         uint64_t value;
858 };
859
860 /* struct iscsi_offload_host_stats: Host statistics,
861  * Include statistics for MAC, IP, TCP & iSCSI.
862  */
863 struct iscsi_offload_host_stats {
864         /* MAC */
865         uint64_t mactx_frames;
866         uint64_t mactx_bytes;
867         uint64_t mactx_multicast_frames;
868         uint64_t mactx_broadcast_frames;
869         uint64_t mactx_pause_frames;
870         uint64_t mactx_control_frames;
871         uint64_t mactx_deferral;
872         uint64_t mactx_excess_deferral;
873         uint64_t mactx_late_collision;
874         uint64_t mactx_abort;
875         uint64_t mactx_single_collision;
876         uint64_t mactx_multiple_collision;
877         uint64_t mactx_collision;
878         uint64_t mactx_frames_dropped;
879         uint64_t mactx_jumbo_frames;
880         uint64_t macrx_frames;
881         uint64_t macrx_bytes;
882         uint64_t macrx_unknown_control_frames;
883         uint64_t macrx_pause_frames;
884         uint64_t macrx_control_frames;
885         uint64_t macrx_dribble;
886         uint64_t macrx_frame_length_error;
887         uint64_t macrx_jabber;
888         uint64_t macrx_carrier_sense_error;
889         uint64_t macrx_frame_discarded;
890         uint64_t macrx_frames_dropped;
891         uint64_t mac_crc_error;
892         uint64_t mac_encoding_error;
893         uint64_t macrx_length_error_large;
894         uint64_t macrx_length_error_small;
895         uint64_t macrx_multicast_frames;
896         uint64_t macrx_broadcast_frames;
897         /* IP */
898         uint64_t iptx_packets;
899         uint64_t iptx_bytes;
900         uint64_t iptx_fragments;
901         uint64_t iprx_packets;
902         uint64_t iprx_bytes;
903         uint64_t iprx_fragments;
904         uint64_t ip_datagram_reassembly;
905         uint64_t ip_invalid_address_error;
906         uint64_t ip_error_packets;
907         uint64_t ip_fragrx_overlap;
908         uint64_t ip_fragrx_outoforder;
909         uint64_t ip_datagram_reassembly_timeout;
910         uint64_t ipv6tx_packets;
911         uint64_t ipv6tx_bytes;
912         uint64_t ipv6tx_fragments;
913         uint64_t ipv6rx_packets;
914         uint64_t ipv6rx_bytes;
915         uint64_t ipv6rx_fragments;
916         uint64_t ipv6_datagram_reassembly;
917         uint64_t ipv6_invalid_address_error;
918         uint64_t ipv6_error_packets;
919         uint64_t ipv6_fragrx_overlap;
920         uint64_t ipv6_fragrx_outoforder;
921         uint64_t ipv6_datagram_reassembly_timeout;
922         /* TCP */
923         uint64_t tcptx_segments;
924         uint64_t tcptx_bytes;
925         uint64_t tcprx_segments;
926         uint64_t tcprx_byte;
927         uint64_t tcp_duplicate_ack_retx;
928         uint64_t tcp_retx_timer_expired;
929         uint64_t tcprx_duplicate_ack;
930         uint64_t tcprx_pure_ackr;
931         uint64_t tcptx_delayed_ack;
932         uint64_t tcptx_pure_ack;
933         uint64_t tcprx_segment_error;
934         uint64_t tcprx_segment_outoforder;
935         uint64_t tcprx_window_probe;
936         uint64_t tcprx_window_update;
937         uint64_t tcptx_window_probe_persist;
938         /* ECC */
939         uint64_t ecc_error_correction;
940         /* iSCSI */
941         uint64_t iscsi_pdu_tx;
942         uint64_t iscsi_data_bytes_tx;
943         uint64_t iscsi_pdu_rx;
944         uint64_t iscsi_data_bytes_rx;
945         uint64_t iscsi_io_completed;
946         uint64_t iscsi_unexpected_io_rx;
947         uint64_t iscsi_format_error;
948         uint64_t iscsi_hdr_digest_error;
949         uint64_t iscsi_data_digest_error;
950         uint64_t iscsi_sequence_error;
951         /*
952          * iSCSI Custom Host Statistics support, i.e. Transport could
953          * extend existing host statistics with its own specific statistics
954          * up to ISCSI_HOST_STATS_CUSTOM_MAX
955          */
956         uint32_t custom_length;
957         struct iscsi_host_stats_custom custom[0]
958                 __aligned(sizeof(uint64_t));
959 };
960
961 #endif