ctl_frontend_iscsi.h revision 268684 
1/*-
2 * Copyright (c) 2012 The FreeBSD Foundation
3 * All rights reserved.
4 *
5 * This software was developed by Edward Tomasz Napierala under sponsorship
6 * from the FreeBSD Foundation.
7 *
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions
10 * are met:
11 * 1. Redistributions of source code must retain the above copyright
12 *    notice, this list of conditions and the following disclaimer.
13 * 2. Redistributions in binary form must reproduce the above copyright
14 *    notice, this list of conditions and the following disclaimer in the
15 *    documentation and/or other materials provided with the distribution.
16 *
17 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
18 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
19 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
20 * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
21 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
22 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
23 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
24 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
25 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
26 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
27 * SUCH DAMAGE.
28 *
29 * $FreeBSD: stable/10/sys/cam/ctl/ctl_frontend_iscsi.h 268684 2014-07-15 17:07:07Z mav $
30 */
31
32#ifndef CTL_FRONTEND_ISCSI_H
33#define	CTL_FRONTEND_ISCSI_H
34
35#define CFISCSI_TARGET_STATE_INVALID	0
36#define CFISCSI_TARGET_STATE_ACTIVE	1
37#define CFISCSI_TARGET_STATE_DYING	2
38
39struct cfiscsi_target {
40	TAILQ_ENTRY(cfiscsi_target)	ct_next;
41	int				ct_luns[CTL_MAX_LUNS];
42	struct cfiscsi_softc		*ct_softc;
43	volatile u_int			ct_refcount;
44	char				ct_name[CTL_ISCSI_NAME_LEN];
45	char				ct_alias[CTL_ISCSI_ALIAS_LEN];
46	int				ct_state;
47	int				ct_online;
48	struct ctl_port			ct_port;
49};
50
51struct cfiscsi_data_wait {
52	TAILQ_ENTRY(cfiscsi_data_wait)	cdw_next;
53	union ctl_io			*cdw_ctl_io;
54	uint32_t			cdw_target_transfer_tag;
55	uint32_t			cdw_initiator_task_tag;
56	int				cdw_sg_index;
57	char				*cdw_sg_addr;
58	size_t				cdw_sg_len;
59};
60
61#define CFISCSI_SESSION_STATE_INVALID		0
62#define CFISCSI_SESSION_STATE_BHS		1
63#define CFISCSI_SESSION_STATE_AHS		2
64#define CFISCSI_SESSION_STATE_HEADER_DIGEST	3
65#define CFISCSI_SESSION_STATE_DATA		4
66#define CFISCSI_SESSION_STATE_DATA_DIGEST	5
67
68struct cfiscsi_session {
69	TAILQ_ENTRY(cfiscsi_session)	cs_next;
70	struct mtx			cs_lock;
71	struct icl_conn			*cs_conn;
72	uint32_t			cs_cmdsn;
73	uint32_t			cs_statsn;
74	uint32_t			cs_target_transfer_tag;
75	volatile u_int			cs_outstanding_ctl_pdus;
76	TAILQ_HEAD(, cfiscsi_data_wait)	cs_waiting_for_data_out;
77	struct cfiscsi_target		*cs_target;
78	struct callout			cs_callout;
79	int				cs_timeout;
80	int				cs_portal_group_tag;
81	struct cv			cs_maintenance_cv;
82	bool				cs_terminating;
83	size_t				cs_max_data_segment_length;
84	size_t				cs_max_burst_length;
85	bool				cs_immediate_data;
86	char				cs_initiator_name[CTL_ISCSI_NAME_LEN];
87	char				cs_initiator_addr[CTL_ISCSI_ADDR_LEN];
88	char				cs_initiator_alias[CTL_ISCSI_ALIAS_LEN];
89	char				cs_initiator_isid[6];
90	char				cs_initiator_id[CTL_ISCSI_NAME_LEN + 5 + 6 + 1];
91	unsigned int			cs_id;
92	int				cs_ctl_initid;
93#ifdef ICL_KERNEL_PROXY
94	struct sockaddr			*cs_initiator_sa;
95	int				cs_portal_id;
96	bool				cs_login_phase;
97	bool				cs_waiting_for_ctld;
98	struct cv			cs_login_cv;
99	struct icl_pdu			*cs_login_pdu;
100#endif
101};
102
103#ifdef ICL_KERNEL_PROXY
104struct icl_listen;
105#endif
106
107struct cfiscsi_softc {
108	struct mtx			lock;
109	char				port_name[32];
110	int				online;
111	unsigned int			last_session_id;
112	TAILQ_HEAD(, cfiscsi_target)	targets;
113	TAILQ_HEAD(, cfiscsi_session)	sessions;
114	char				ctl_initids[CTL_MAX_INIT_PER_PORT];
115	int				max_initiators;
116#ifdef ICL_KERNEL_PROXY
117	struct icl_listen		*listener;
118	struct cv			accept_cv;
119#endif
120};
121
122#endif /* !CTL_FRONTEND_ISCSI_H */
123