xref: /titanic_41/usr/src/uts/common/io/comstar/port/iscsit/iscsit.h (revision 680ce822793e73311b00afa31b4cc066f527b731)
1 /*
2  * CDDL HEADER START
3  *
4  * The contents of this file are subject to the terms of the
5  * Common Development and Distribution License (the "License").
6  * You may not use this file except in compliance with the License.
7  *
8  * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
9  * or http://www.opensolaris.org/os/licensing.
10  * See the License for the specific language governing permissions
11  * and limitations under the License.
12  *
13  * When distributing Covered Code, include this CDDL HEADER in each
14  * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
15  * If applicable, add the following below this CDDL HEADER, with the
16  * fields enclosed by brackets "[]" replaced with your own identifying
17  * information: Portions Copyright [yyyy] [name of copyright owner]
18  *
19  * CDDL HEADER END
20  */
21 
22 /*
23  * Copyright (c) 2008, 2010, Oracle and/or its affiliates. All rights reserved.
24  * Copyright 2014 Nexenta Systems, Inc.  All rights reserved.
25  */
26 
27 #ifndef _ISCSIT_H_
28 #define	_ISCSIT_H_
29 
30 #include <sys/iscsit/iscsi_if.h>
31 #include <sys/iscsit/iscsit_common.h>
32 
33 #include "iscsit_authclient.h"
34 
35 /*
36  * For some reason iscsi_protocol.h lists the max version as "0x02" and the
37  * min version as "0x00".  RFC3720 clearly states that the current version
38  * number is 0x00 so that is what we will use.
39  */
40 #define	ISCSIT_MIN_VERSION			0x00
41 #define	ISCSIT_MAX_VERSION			0x00
42 #define	ISCSIT_MAX_CONNECTIONS			32 /* MC/S support  */
43 #define	ISCSIT_MAX_RECV_DATA_SEGMENT_LENGTH	(32*1024)
44 #define	ISCSIT_MAX_BURST_LENGTH			(1024*1024)
45 #define	ISCSIT_MAX_FIRST_BURST_LENGTH		ISCSI_DEFAULT_FIRST_BURST_LENGTH
46 #define	ISCSIT_MAX_TIME2WAIT			ISCSI_MAX_TIME2WAIT
47 #define	ISCSIT_MAX_TIME2RETAIN			ISCSI_DEFAULT_TIME_TO_RETAIN
48 #define	ISCSIT_MAX_OUTSTANDING_R2T		ISCSI_DEFAULT_MAX_OUT_R2T
49 #define	ISCSIT_MAX_ERROR_RECOVERY_LEVEL		0
50 #define	ISCSIT_MAX_OUTSTANDING_UNEXPECTED_PDUS	0
51 
52 #define	ISCSIT_DEFAULT_TPG	"iscsit-default-tpg"
53 #define	ISCSIT_DEFAULT_TPGT	1
54 
55 #define	ISCSI_MAX_TSIH		0xffff
56 #define	ISCSI_UNSPEC_TSIH	0
57 
58 /* Max targets per system */
59 #define	ISCSIT_MAX_TARGETS	1024
60 
61 #define	ISCSIT_MAX_WINDOW	1024
62 #define	ISCSIT_RXPDU_QUEUE_LEN	2048
63 
64 #define	ISCSIT_CMDSN_LT_EXPCMDSN	-1
65 #define	ISCSIT_CMDSN_EQ_EXPCMDSN	1
66 #define	ISCSIT_CMDSN_GT_EXPCMDSN	0
67 /*
68  * MC/S: A timeout is maintained to recover from lost CmdSN (holes in the
69  * CmdSN ordering). When the timeout is reached, the ExpCmdSN is advanced
70  * past the hole to continue processing the queued commands. This value is
71  * system-tunable (volatile rxpdu_queue_threshold) and should be in the
72  * range from 5 to 30 seconds.
73  */
74 #define	ISCSIT_RXPDU_QUEUE_THRESHOLD		5	/* 5 seconds */
75 #define	ISCSIT_RXPDU_QUEUE_MONITOR_INTERVAL	5	/* 5 seconds */
76 
77 /* Time in seconds to wait between calls to stmf_deregister_local_port */
78 #define	TGT_DEREG_RETRY_SECONDS	1
79 
80 #define	ISCSIT_GLOBAL_LOCK(rw) rw_enter(&iscsit_global.global_rwlock, (rw))
81 #define	ISCSIT_GLOBAL_UNLOCK() rw_exit(&iscsit_global.global_rwlock)
82 
83 /* Circular buffer to hold the out-of-order PDUs in MC/S */
84 typedef struct {
85 	idm_pdu_t	*cb_buffer[ISCSIT_RXPDU_QUEUE_LEN];
86 	int		cb_num_elems;
87 } iscsit_cbuf_t;
88 
89 /*
90  * Used for serial number arithmetic (RFC 1982)
91  */
92 #define	ISCSIT_SNA32_CHECK	0x80000000
93 
94 typedef struct {
95 	char		tpg_name[MAX_TPG_NAMELEN];
96 	kmutex_t	tpg_mutex;
97 	idm_refcnt_t	tpg_refcnt;
98 	int		tpg_online;
99 	avl_tree_t	tpg_portal_list;
100 	avl_node_t	tpg_global_ln;
101 	list_node_t	tpg_delete_ln;
102 } iscsit_tpg_t;
103 
104 #define	IS_DEFAULT_TPGT(TPGT) \
105 	(((TPGT) != NULL) && \
106 	    ((TPGT)->tpgt_tpg == iscsit_global.global_default_tpg))
107 
108 typedef struct {
109 	iscsit_tpg_t	*tpgt_tpg;
110 	idm_refcnt_t	tpgt_refcnt;
111 	avl_node_t	tpgt_tgt_ln;
112 	list_node_t	tpgt_delete_ln;
113 	uint16_t	tpgt_tag;
114 	boolean_t	tpgt_needs_tpg_offline;
115 } iscsit_tpgt_t;
116 
117 typedef struct {
118 	struct sockaddr_storage portal_addr;
119 	int			portal_online;
120 	idm_refcnt_t		portal_refcnt;
121 	avl_node_t		portal_tpg_ln;
122 	iscsit_tpg_t		*portal_tpg;
123 	idm_svc_t		*portal_svc;
124 	boolean_t		portal_default;
125 	void			*portal_isns;
126 } iscsit_portal_t;
127 
128 
129 /* Target states and events, update iscsit_ts_name table whenever modified */
130 typedef enum {
131 	TS_UNDEFINED = 0,
132 	TS_CREATED,
133 	TS_ONLINING,
134 	TS_ONLINE,
135 	TS_STMF_ONLINE,
136 	TS_DELETING_NEED_OFFLINE,
137 	TS_OFFLINING,
138 	TS_OFFLINE,
139 	TS_STMF_OFFLINE,
140 	TS_DELETING_STMF_DEREG,
141 	TS_DELETING_STMF_DEREG_FAIL,
142 	TS_DELETING,
143 	TS_MAX_STATE
144 } iscsit_tgt_state_t;
145 
146 #ifdef ISCSIT_TGT_SM_STRINGS
147 static const char *iscsit_ts_name[TS_MAX_STATE+1] = {
148 	"TS_UNDEFINED",
149 	"TS_CREATED",
150 	"TS_ONLINING",
151 	"TS_ONLINE",
152 	"TS_STMF_ONLINE",
153 	"TS_DELETING_NEED_OFFLINE",
154 	"TS_OFFLINING",
155 	"TS_OFFLINE",
156 	"TS_STMF_OFFLINE",
157 	"TS_DELETING_STMF_DEREG",
158 	"TS_DELETING_STMF_DEREG_FAIL",
159 	"TS_DELETING",
160 	"TS_MAX_STATE"
161 };
162 #endif
163 
164 typedef enum {
165 	TE_UNDEFINED = 0,
166 	TE_STMF_ONLINE_REQ,
167 	TE_ONLINE_SUCCESS,
168 	TE_ONLINE_FAIL,
169 	TE_STMF_ONLINE_COMPLETE_ACK,
170 	TE_STMF_OFFLINE_REQ,
171 	TE_OFFLINE_COMPLETE,
172 	TE_STMF_OFFLINE_COMPLETE_ACK,
173 	TE_DELETE,
174 	TE_STMF_DEREG_SUCCESS,
175 	TE_STMF_DEREG_FAIL,
176 	TE_STMF_DEREG_RETRY,
177 	TE_WAIT_REF_COMPLETE,
178 	TE_MAX_EVENT
179 } iscsit_tgt_event_t;
180 
181 #ifdef ISCSIT_TGT_SM_STRINGS
182 static const char *iscsit_te_name[TE_MAX_EVENT+1] = {
183 	"TE_UNDEFINED",
184 	"TE_STMF_ONLINE_REQ",
185 	"TE_ONLINE_SUCCESS",
186 	"TE_ONLINE_FAIL",
187 	"TE_STMF_ONLINE_COMPLETE_ACK",
188 	"TE_STMF_OFFLINE_REQ",
189 	"TE_OFFLINE_COMPLETE",
190 	"TE_STMF_OFFLINE_COMPLETE_ACK",
191 	"TE_DELETE",
192 	"TE_STMF_DEREG_SUCCESS",
193 	"TE_STMF_DEREG_FAIL",
194 	"TE_STMF_DEREG_RETRY",
195 	"TE_WAIT_REF_COMPLETE",
196 	"TE_MAX_EVENT"
197 };
198 #endif
199 
200 typedef struct {
201 	char			*target_name;
202 	nvlist_t		*target_props;
203 	kmutex_t		target_mutex;
204 	idm_refcnt_t		target_refcnt;
205 	idm_refcnt_t		target_sess_refcnt;
206 	avl_tree_t		target_tpgt_list;
207 	avl_tree_t		target_sess_list;
208 	avl_node_t		target_global_ln;
209 	avl_node_t		target_global_deleted_ln;
210 	/* STMF lport == iSCSI target */
211 	scsi_devid_desc_t	*target_devid;
212 	stmf_local_port_t	*target_stmf_lport;
213 	uint8_t			target_stmf_lport_registered;
214 
215 	/* Target state */
216 	boolean_t		target_sm_busy;
217 	boolean_t		target_deleting;
218 	iscsit_tgt_state_t	target_state;
219 	iscsit_tgt_state_t	target_last_state;
220 	sm_audit_buf_t		target_state_audit;
221 	list_t			target_events;
222 	uint64_t		target_generation;
223 } iscsit_tgt_t;
224 
225 typedef struct {
226 	char			ini_name[MAX_ISCSI_NODENAMELEN];
227 	nvlist_t		*ini_props;
228 	avl_node_t		ini_global_ln;
229 } iscsit_ini_t;
230 
231 /*
232  * iSCSI Auth Information
233  */
234 typedef struct conn_auth {
235 	char			ca_tgt_chapuser[iscsitAuthStringMaxLength];
236 	uint8_t			ca_tgt_chapsecret[iscsitAuthStringMaxLength];
237 	int			ca_tgt_chapsecretlen;
238 
239 	char			ca_ini_chapuser[iscsitAuthStringMaxLength];
240 	uint8_t			ca_ini_chapsecret[iscsitAuthStringMaxLength];
241 	int			ca_ini_chapsecretlen;
242 
243 	/* RADIUS authentication information   	*/
244 	boolean_t		ca_use_radius;
245 	struct sockaddr_storage	ca_radius_server;
246 	uint8_t			ca_radius_secret[iscsitAuthStringMaxLength];
247 	int			ca_radius_secretlen;
248 
249 	/* authentication method list */
250 	iscsit_auth_method_t	ca_method_valid_list[iscsitAuthMethodMaxCount];
251 
252 	/* Target alias */
253 	char			ca_tgt_alias[MAX_ISCSI_NODENAMELEN];
254 } conn_auth_t;
255 
256 /*
257  * We have three state machines (so far) between the IDM connection state
258  * machine, the session state machine, and the login state machine.  All
259  * of these states have some concept of "full feature mode".  It's going
260  * to be obnoxious if we use a mixture of these "ffp" representations
261  * since it will be difficult to ensure the three state machines
262  * transition at exactly the same time.  We should drive decisions that
263  * depend on FFP from the IDM state machine which is actually snooping
264  * the iSCSI PDU's and will always transition at the correct time.
265  *
266  * A consequence of this approach is that there is a window just after
267  * login completes where we may get a SCSI request but the session
268  * or login state machine has not quite transitioned to "FFP".  Whether
269  * this is a problem depends on how we use those state machines.  This
270  * is what we should use them for:
271  *
272  * IDM Connection state machine - Decisions related to command processing
273  * including whether a connection is in FFP
274  *
275  * Session state machine - Summarize the state of all available connections
276  * for the purposes of ERL1, ERL2 and MC/S.  A session in LOGGED_IN state
277  * should always have at least one FFP connection but there may be a brief
278  * window where a session in ACTIVE might have one or more FFP connections
279  * even though ACTIVE is not strictly an FFP state according to the RFC.
280  *
281  * Login state machine -- drive the login process, collect negotiated
282  * parameters.  Another side effect of this approach is that we may get
283  * the "notify ffp" callback from the IDM connection state machine before
284  * the login state machine has actually transitioned to FFP state.
285  */
286 
287 struct iscsit_conn_s;
288 
289 /* Update iscsit_ss_name table whenever session states are modified */
290 typedef enum {
291 	SS_UNDEFINED = 0,
292 	SS_Q1_FREE,
293 	SS_Q2_ACTIVE,
294 	SS_Q3_LOGGED_IN,
295 	SS_Q4_FAILED,
296 	SS_Q5_CONTINUE,
297 	SS_Q6_DONE,
298 	SS_Q7_ERROR,
299 	/* Add new session states above SS_MAX_STATE */
300 	SS_MAX_STATE
301 } iscsit_session_state_t;
302 
303 #ifdef ISCSIT_SESS_SM_STRINGS
304 /* An array of state text values, for use in logging state transitions */
305 static const char *iscsit_ss_name[SS_MAX_STATE+1] = {
306 	"SS_UNDEFINED",
307 	"SS_Q1_FREE",
308 	"SS_Q2_ACTIVE",
309 	"SS_Q3_LOGGED_IN",
310 	"SS_Q4_FAILED",
311 	"SS_Q5_CONTINUE",
312 	"SS_Q6_DONE",
313 	"SS_Q7_ERROR",
314 	"SS_MAX_STATE"
315 };
316 #endif
317 
318 /* Update iscsit_se_name table whenever session events are modified */
319 typedef enum {
320 	SE_UNDEFINED = 0,
321 	SE_CONN_IN_LOGIN,	/* From login state machine */
322 	SE_CONN_LOGGED_IN,	/* FFP enabled client notification */
323 	SE_CONN_FFP_FAIL,	/* FFP disabled client notification */
324 	SE_CONN_FFP_DISABLE,	/* FFP disabled client notification */
325 	SE_CONN_FAIL,		/* Conn destroy client notification */
326 	SE_SESSION_CLOSE,	/* FFP disabled client notification */
327 	SE_SESSION_REINSTATE,	/* From login state machine */
328 	SE_SESSION_TIMEOUT,	/* Internal */
329 	SE_SESSION_CONTINUE,	/* From login state machine */
330 	SE_SESSION_CONTINUE_FAIL, /* From login state machine? */
331 	/* Add new events above SE_MAX_EVENT */
332 	SE_MAX_EVENT
333 } iscsit_session_event_t;
334 
335 #ifdef ISCSIT_SESS_SM_STRINGS
336 /* An array of event text values, for use in logging events */
337 static const char *iscsit_se_name[SE_MAX_EVENT+1] = {
338 	"SE_UNDEFINED",
339 	"SE_CONN_IN_LOGIN",
340 	"SE_CONN_LOGGED_IN",
341 	"SE_CONN_FFP_FAIL",
342 	"SE_CONN_FFP_DISABLE",
343 	"SE_CONN_FAIL",
344 	"SE_SESSION_CLOSE",
345 	"SE_SESSION_REINSTATE",
346 	"SE_SESSION_TIMEOUT",
347 	"SE_SESSION_CONTINUE",
348 	"SE_SESSION_CONTINUE_FAIL",
349 	"SE_MAX_EVENT"
350 };
351 #endif
352 
353 /*
354  * Set in ist_tgt after iscsit_tgt_unbind_sess to differentiate an unbound
355  * session from a discovery session.
356  */
357 #define	SESS_UNBOUND_FROM_TGT	-1
358 
359 typedef struct {
360 	stmf_scsi_session_t	*ist_stmf_sess;
361 	stmf_local_port_t	*ist_lport;
362 	iscsit_tgt_t		*ist_tgt;
363 	idm_refcnt_t		ist_refcnt;
364 	kmem_cache_t		*ist_task_cache;
365 	kmutex_t		ist_sn_mutex;
366 	kmutex_t		ist_mutex;
367 	kcondvar_t		ist_cv;
368 	iscsit_session_state_t	ist_state;
369 	iscsit_session_state_t	ist_last_state;
370 	sm_audit_buf_t		ist_state_audit;
371 	boolean_t		ist_sm_busy;
372 	boolean_t		ist_sm_complete;
373 	boolean_t		ist_admin_close;
374 	list_t			ist_events;
375 	int			ist_conn_count;
376 	int			ist_ffp_conn_count;
377 	struct iscsit_conn_s	*ist_failed_conn;
378 	timeout_id_t		ist_state_timeout;
379 	list_t			ist_conn_list;
380 	avl_node_t		ist_tgt_ln;
381 	char			*ist_initiator_name;
382 	char			*ist_initiator_alias;
383 	char			*ist_target_name;
384 	char			*ist_target_alias;
385 	uint8_t			ist_isid[ISCSI_ISID_LEN];
386 	uint16_t		ist_tsih;
387 	uint16_t		ist_tpgt_tag;
388 	uint32_t		ist_expcmdsn;
389 	uint32_t		ist_maxcmdsn;
390 	avl_tree_t		ist_task_list;
391 	iscsit_cbuf_t		*ist_rxpdu_queue;
392 } iscsit_sess_t;
393 
394 /* Update iscsit_ils_name table whenever login states are modified */
395 typedef enum {
396 	ILS_UNDEFINED = 0,
397 	ILS_LOGIN_INIT,
398 	ILS_LOGIN_WAITING,	/* Waiting for more login PDU's */
399 	ILS_LOGIN_PROCESSING,	/* Processing login request */
400 	ILS_LOGIN_RESPONDING,	/* Sending login response */
401 	ILS_LOGIN_RESPONDED,	/* Sent login response (no trans. to FFP) */
402 	ILS_LOGIN_FFP,		/* Sending last login PDU for final response */
403 	ILS_LOGIN_DONE,		/* Last login PDU sent (so we can free it) */
404 	ILS_LOGIN_ERROR,	/* Login error, login failed */
405 	/* Add new login states above ILS_MAX_STATE */
406 	ILS_MAX_STATE
407 } iscsit_login_state_t;
408 
409 #ifdef ISCSIT_LOGIN_SM_STRINGS
410 /* An array of login state text values, for use in logging login progress */
411 static const char *iscsit_ils_name[ILS_MAX_STATE+1] = {
412 	"ILS_UNDEFINED",
413 	"ILS_LOGIN_INIT",
414 	"ILS_LOGIN_WAITING",
415 	"ILS_LOGIN_PROCESSING",
416 	"ILS_LOGIN_RESPONDING",
417 	"ILS_LOGIN_RESPONDED",
418 	"ILS_LOGIN_FFP",
419 	"ILS_LOGIN_DONE",
420 	"ILS_LOGIN_ERROR",
421 	"ILS_MAX_STATE"
422 };
423 #endif
424 
425 /* Update iscsit_ile_name table whenever login events are modified */
426 typedef enum {
427 	ILE_UNDEFINED = 0,
428 	ILE_LOGIN_RCV,
429 	ILE_LOGIN_RESP_READY,
430 	ILE_LOGIN_FFP,
431 	ILE_LOGIN_RESP_COMPLETE,
432 	ILE_LOGIN_ERROR,
433 	ILE_LOGIN_CONN_ERROR,
434 	/* Add new login events above ILE_MAX_EVENT */
435 	ILE_MAX_EVENT
436 } iscsit_login_event_t;
437 
438 #ifdef ISCSIT_LOGIN_SM_STRINGS
439 /* An array of login event text values, for use in logging login events */
440 static const char *iscsit_ile_name[ILE_MAX_EVENT+1] = {
441 	"ILE_UNDEFINED",
442 	"ILE_LOGIN_RCV",
443 	"ILE_LOGIN_RESP_READY",
444 	"ILE_LOGIN_FFP",
445 	"ILE_LOGIN_RESP_COMPLETE",
446 	"ILE_LOGIN_ERROR",
447 	"ILE_LOGIN_CONN_ERROR",
448 	"ILE_MAX_EVENT"
449 };
450 #endif
451 
452 typedef struct {
453 	uint32_t		op_initial_params_set:1,
454 				op_discovery_session:1,
455 				op_initial_r2t:1,
456 				op_immed_data:1,
457 				op_data_pdu_in_order:1,
458 				op_data_sequence_in_order:1,
459 				op_declarative_params_set:1;
460 	uint64_t		op_max_connections;
461 	uint64_t		op_max_recv_data_segment_length;
462 	uint64_t		op_max_burst_length;
463 	uint64_t		op_first_burst_length;
464 	uint64_t		op_default_time_2_wait;
465 	uint64_t		op_default_time_2_retain;
466 	uint64_t		op_max_outstanding_r2t;
467 	uint64_t		op_error_recovery_level;
468 } iscsit_op_params_t;
469 
470 typedef struct {
471 	iscsit_login_state_t 	icl_login_state;
472 	iscsit_login_state_t 	icl_login_last_state;
473 	sm_audit_buf_t		icl_state_audit;
474 	boolean_t		icl_busy;
475 	boolean_t		icl_login_complete;
476 	kmutex_t		icl_mutex;
477 	uint32_t		icl_login_itt;
478 	uint8_t			icl_login_csg;
479 	uint8_t			icl_login_nsg;
480 	boolean_t		icl_login_transit;
481 	conn_auth_t		icl_auth;
482 	iscsit_auth_client_t	icl_auth_client;
483 	int			icl_auth_pass;
484 	list_t			icl_login_events;
485 	list_t			icl_pdu_list;
486 	uint16_t		icl_tsih;
487 	uint8_t			icl_isid[ISCSI_ISID_LEN];
488 	uint32_t		icl_cmdsn;
489 	uint16_t		icl_tpgt_tag;
490 	char			*icl_target_name;
491 	char			*icl_target_alias;
492 	char			*icl_initiator_name;
493 	char			*icl_login_resp_buf;
494 	void			*icl_login_resp_itb; /* mult-pdu idm buf */
495 	int			icl_login_resp_len; /* For kmem_free */
496 	int			icl_login_resp_valid_len;
497 	uint8_t			icl_login_resp_err_class;
498 	uint8_t			icl_login_resp_err_detail;
499 	iscsi_login_rsp_hdr_t	*icl_login_resp_tmpl;
500 	nvlist_t		*icl_request_nvlist;
501 	nvlist_t		*icl_response_nvlist;
502 	nvlist_t		*icl_negotiated_values;
503 } iscsit_conn_login_t;
504 
505 #define	SET_LOGIN_ERROR(SLE_ICT, SLE_CLASS, SLE_DETAIL) \
506 	(SLE_ICT)->ict_login_sm.icl_login_resp_err_class = (SLE_CLASS); \
507 	(SLE_ICT)->ict_login_sm.icl_login_resp_err_detail = (SLE_DETAIL);
508 
509 typedef struct iscsit_conn_s {
510 	idm_conn_t		*ict_ic;
511 	iscsit_sess_t		*ict_sess;
512 	kmutex_t		ict_mutex;
513 	idm_refcnt_t		ict_refcnt;
514 	idm_refcnt_t		ict_dispatch_refcnt;
515 	list_node_t		ict_sess_ln;
516 	iscsit_conn_login_t	ict_login_sm;
517 	iscsit_op_params_t	ict_op;
518 	uint16_t		ict_cid;
519 	uint32_t		ict_statsn;
520 	kmutex_t		ict_statsn_mutex;
521 	uint32_t		ict_keepalive_ttt;
522 	struct iscsit_conn_s	*ict_reinstate_conn;
523 	uint32_t		ict_reinstating:1,
524 				ict_lost:1,
525 				ict_destroyed:1;
526 	/*
527 	 * Parameters for processing text commands
528 	 */
529 	char			*ict_text_rsp_buf;
530 	uint32_t		ict_text_rsp_len;
531 	uint32_t		ict_text_rsp_valid_len;
532 	uint32_t		ict_text_rsp_off;
533 	uint32_t		ict_text_req_itt;	/* from initiator */
534 	uint32_t		ict_text_rsp_ttt;
535 } iscsit_conn_t;
536 
537 #define	ICT_FLAGS_DISCOVERY	0x00000001
538 
539 typedef struct {
540 	idm_buf_t		*ibuf_idm_buf;
541 	stmf_data_buf_t		*ibuf_stmf_buf;
542 	idm_pdu_t		*ibuf_immed_data_pdu;
543 	boolean_t		ibuf_is_immed;
544 } iscsit_buf_t;
545 
546 typedef struct {
547 	scsi_task_t		*it_stmf_task;
548 	idm_task_t		*it_idm_task;
549 	iscsit_buf_t		*it_immed_data;
550 	iscsit_conn_t		*it_ict;
551 	kmutex_t		it_mutex;
552 	idm_pdu_t		*it_tm_pdu;
553 	uint32_t		it_stmf_abort:1,
554 				it_aborted:1,
555 				it_active:1,
556 				it_tm_task:1,
557 				it_tm_responded:1;
558 	uint32_t		it_cmdsn;
559 	uint32_t		it_itt;
560 	uint32_t		it_ttt;
561 	avl_node_t		it_sess_ln;
562 } iscsit_task_t;
563 
564 typedef struct iscsit_isns_cfg {
565 	kmutex_t		isns_mutex;
566 	boolean_t		isns_state;
567 	list_t			isns_svrs;
568 } iscsit_isns_cfg_t;
569 
570 /*
571  * State values for the iscsit service
572  */
573 typedef enum {
574 	ISE_UNDEFINED = 0,
575 	ISE_DETACHED,
576 	ISE_DISABLED,
577 	ISE_ENABLING,
578 	ISE_ENABLED,
579 	ISE_BUSY,
580 	ISE_DISABLING
581 } iscsit_service_enabled_t;
582 
583 
584 typedef struct {
585 	iscsit_service_enabled_t	global_svc_state;
586 	dev_info_t			*global_dip;
587 	ldi_ident_t			global_li;
588 	nvlist_t			*global_props;
589 	stmf_port_provider_t		*global_pp;
590 	stmf_dbuf_store_t		*global_dbuf_store;
591 	taskq_t				*global_dispatch_taskq;
592 	idm_refcnt_t			global_refcnt;
593 	avl_tree_t			global_discovery_sessions;
594 	avl_tree_t			global_target_list;
595 	list_t				global_deleted_target_list;
596 	avl_tree_t			global_tpg_list;
597 	avl_tree_t			global_ini_list;
598 	iscsit_tpg_t			*global_default_tpg;
599 	vmem_t				*global_tsih_pool;
600 	iscsit_isns_cfg_t		global_isns_cfg;
601 	iscsi_radius_props_t		global_radius_server;
602 	krwlock_t			global_rwlock;
603 	kmutex_t			global_state_mutex;
604 } iscsit_global_t;
605 
606 extern iscsit_global_t iscsit_global;
607 
608 void
609 iscsit_global_hold();
610 
611 void
612 iscsit_global_rele();
613 
614 void
615 iscsit_global_wait_ref();
616 
617 idm_status_t
618 iscsit_login_sm_init(iscsit_conn_t *ict);
619 
620 void
621 iscsit_login_sm_fini(iscsit_conn_t *ict);
622 
623 void
624 iscsit_login_sm_event(iscsit_conn_t *ic, iscsit_login_event_t event,
625     idm_pdu_t *pdu);
626 
627 void
628 iscsit_login_sm_event_locked(iscsit_conn_t *ic, iscsit_login_event_t event,
629     idm_pdu_t *pdu);
630 
631 int
632 iscsit_is_v4_mapped(struct sockaddr_storage *sa, struct sockaddr_storage *v4sa);
633 
634 void
635 iscsit_send_async_event(iscsit_conn_t *ict, uint8_t async_event);
636 
637 void
638 iscsit_pdu_tx(idm_pdu_t *pdu);
639 
640 void
641 iscsit_send_reject(iscsit_conn_t *ict, idm_pdu_t *rejected_pdu, uint8_t reason);
642 
643 void
644 iscsit_text_cmd_fini(iscsit_conn_t *ict);
645 
646 /*
647  * IDM conn ops
648  */
649 
650 idm_rx_pdu_cb_t		iscsit_op_scsi_cmd;
651 idm_rx_pdu_cb_t		iscsit_rx_pdu;
652 idm_rx_pdu_error_cb_t	iscsit_rx_pdu_error;
653 idm_task_cb_t		iscsit_task_aborted;
654 idm_client_notify_cb_t	iscsit_client_notify;
655 idm_build_hdr_cb_t	iscsit_build_hdr;
656 idm_update_statsn_cb_t	iscsit_update_statsn;
657 idm_keepalive_cb_t	iscsit_keepalive;
658 
659 /*
660  * lport entry points
661  */
662 stmf_status_t
663 iscsit_xfer_scsi_data(scsi_task_t *task, stmf_data_buf_t *dbuf,
664     uint32_t ioflags);
665 
666 stmf_status_t
667 iscsit_send_scsi_status(scsi_task_t *task, uint32_t ioflags);
668 
669 void
670 iscsit_lport_task_free(scsi_task_t *task);
671 
672 stmf_status_t
673 iscsit_abort(stmf_local_port_t *lport, int abort_cmd, void *arg,
674     uint32_t flags);
675 
676 void
677 iscsit_ctl(stmf_local_port_t *lport, int cmd, void *arg);
678 
679 /*
680  * Connection functions
681  */
682 idm_status_t
683 iscsit_conn_reinstate(iscsit_conn_t *existing_ict, iscsit_conn_t *ict);
684 
685 void
686 iscsit_conn_destroy_done(iscsit_conn_t *ict);
687 
688 void
689 iscsit_conn_set_auth(iscsit_conn_t *ict);
690 
691 void
692 iscsit_conn_hold(iscsit_conn_t *ict);
693 
694 void
695 iscsit_conn_rele(iscsit_conn_t *ict);
696 
697 void
698 iscsit_conn_logout(iscsit_conn_t *ict);
699 
700 /*
701  * Session functions
702  */
703 int
704 iscsit_sess_avl_compare(const void *void_sess1, const void *void_sess2);
705 
706 iscsit_sess_t *
707 iscsit_sess_create(iscsit_tgt_t *tgt, iscsit_conn_t *ict,
708     uint32_t cmdsn, uint8_t *isid, uint16_t tag,
709     char *initiator_name, char *target_name,
710     uint8_t *error_class, uint8_t *error_detail);
711 
712 void
713 iscsit_sess_destroy(iscsit_sess_t *ist);
714 
715 void
716 iscsit_sess_hold(iscsit_sess_t *ist);
717 
718 idm_status_t
719 iscsit_sess_check_hold(iscsit_sess_t *ist);
720 
721 void
722 iscsit_sess_rele(iscsit_sess_t *ist);
723 
724 iscsit_conn_t *
725 iscsit_sess_lookup_conn(iscsit_sess_t *ist, uint16_t cid);
726 
727 void
728 iscsit_sess_bind_conn(iscsit_sess_t *ist, iscsit_conn_t *ict);
729 
730 void
731 iscsit_sess_unbind_conn(iscsit_sess_t *ist, iscsit_conn_t *ict);
732 
733 void
734 iscsit_sess_close(iscsit_sess_t *ist);
735 
736 iscsit_sess_t *
737 iscsit_sess_reinstate(iscsit_tgt_t *tgt, iscsit_sess_t *ist, iscsit_conn_t *ict,
738     uint8_t *error_class, uint8_t *error_detail);
739 
740 void
741 iscsit_sess_sm_event(iscsit_sess_t *ist, iscsit_session_event_t event,
742     iscsit_conn_t *ict);
743 
744 /*
745  * Target, TPGT, TPGT and portal functions
746  */
747 
748 void
749 iscsit_tgt_sm_event(iscsit_tgt_t *tgt, iscsit_tgt_event_t event);
750 
751 void
752 tgt_sm_event_locked(iscsit_tgt_t *tgt, iscsit_tgt_event_t event);
753 
754 it_cfg_status_t
755 iscsit_config_merge_tgt(it_config_t *cfg);
756 
757 void
758 iscsit_config_destroy_tgts(list_t *tgt_del_list);
759 
760 void
761 iscsit_config_destroy_tpgts(list_t *tpgt_del_list);
762 
763 iscsit_tgt_t *
764 iscsit_tgt_lookup(char *target_name);
765 
766 iscsit_tgt_t *
767 iscsit_tgt_lookup_locked(char *target_name);
768 
769 int
770 iscsit_tgt_avl_compare(const void *void_tgt1, const void *void_tgt2);
771 
772 int
773 iscsit_tpgt_avl_compare(const void *void_tpgt1, const void *void_tpgt2);
774 
775 void
776 iscsit_tgt_hold(iscsit_tgt_t *tgt);
777 
778 void
779 iscsit_tgt_rele(iscsit_tgt_t *tgt);
780 
781 iscsit_tpgt_t *
782 iscsit_tgt_lookup_tpgt(iscsit_tgt_t *tgt, uint16_t tag);
783 
784 void
785 iscsit_tpgt_hold(iscsit_tpgt_t *tpgt);
786 
787 void
788 iscsit_tpgt_rele(iscsit_tpgt_t *tpgt);
789 
790 iscsit_portal_t *
791 iscsit_tgt_lookup_portal(iscsit_tgt_t *tgt, struct sockaddr_storage *sa,
792     iscsit_tpgt_t **output_tpgt);
793 
794 iscsit_sess_t *
795 iscsit_tgt_lookup_sess(iscsit_tgt_t *tgt, char *initiator_name,
796     uint8_t *isid, uint16_t tsih, uint16_t tag);
797 
798 void
799 iscsit_tgt_bind_sess(iscsit_tgt_t *tgt, iscsit_sess_t *sess);
800 
801 void
802 iscsit_tgt_unbind_sess(iscsit_tgt_t *tgt, iscsit_sess_t *sess);
803 
804 it_cfg_status_t
805 iscsit_config_merge_tpg(it_config_t *cfg, list_t *tpg_del_list);
806 
807 void
808 iscsit_config_destroy_tpgs(list_t *tpg_del_list);
809 
810 iscsit_tpg_t *
811 iscsit_tpg_lookup(char *tpg_name);
812 
813 int
814 iscsit_tpg_avl_compare(const void *void_tpg1, const void *void_tpg2);
815 
816 void
817 iscsit_tpg_hold(iscsit_tpg_t *tpg);
818 
819 void
820 iscsit_tpg_rele(iscsit_tpg_t *tpg);
821 
822 iscsit_tpg_t *
823 iscsit_tpg_createdefault();
824 
825 void
826 iscsit_tpg_destroydefault(iscsit_tpg_t *tpg);
827 
828 idm_status_t
829 iscsit_tpg_online(iscsit_tpg_t *tpg);
830 
831 void
832 iscsit_tpg_offline(iscsit_tpg_t *tpg);
833 
834 iscsit_portal_t *
835 iscsit_tpg_portal_lookup(iscsit_tpg_t *tpg, struct sockaddr_storage *sa);
836 
837 void
838 iscsit_portal_hold(iscsit_portal_t *portal);
839 
840 void
841 iscsit_portal_rele(iscsit_portal_t *portal);
842 
843 it_cfg_status_t
844 iscsit_config_merge_ini(it_config_t *cfg);
845 
846 int
847 iscsit_ini_avl_compare(const void *void_ini1, const void *void_ini2);
848 
849 iscsit_ini_t *
850 iscsit_ini_lookup_locked(char *ini_name);
851 
852 int
853 iscsit_portal_avl_compare(const void *void_portal1, const void *void_portal2);
854 
855 int
856 iscsit_verify_chap_resp(iscsit_conn_login_t *lsm,
857     unsigned int chap_i, uchar_t *chap_c, unsigned int challenge_len,
858     uchar_t *chap_r, unsigned int resp_len);
859 
860 void
861 iscsit_rxpdu_queue_monitor_start(void);
862 
863 void
864 iscsit_rxpdu_queue_monitor_stop(void);
865 
866 #endif /* _ISCSIT_H_ */
867