2 * Copyright (c) 2003-2009 Silicon Graphics International Corp.
3 * Copyright (c) 2011 Spectra Logic Corporation
4 * Copyright (c) 2015 Alexander Motin <mav@FreeBSD.org>
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
10 * 1. Redistributions of source code must retain the above copyright
11 * notice, this list of conditions, and the following disclaimer,
12 * without modification.
13 * 2. Redistributions in binary form must reproduce at minimum a disclaimer
14 * substantially similar to the "NO WARRANTY" disclaimer below
15 * ("Disclaimer") and any redistribution must be conditioned upon
16 * including a substantially similar Disclaimer requirement for further
17 * binary redistribution.
20 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
21 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
22 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR
23 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
24 * HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
25 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
26 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
27 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
28 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
29 * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
30 * POSSIBILITY OF SUCH DAMAGES.
32 * $Id: //depot/users/kenm/FreeBSD-test2/sys/cam/ctl/ctl_ha.h#1 $
40 * CTL High Availability Modes:
42 * CTL_HA_MODE_ACT_STBY: Commands are serialized to the master side.
43 * No media access commands on slave side (Standby).
44 * CTL_HA_MODE_SER_ONLY: Commands are serialized to the master side.
45 * Media can be accessed on both sides.
46 * CTL_HA_MODE_XFER: Commands and data are forwarded to the
47 * master side for execution.
56 * Communication channel IDs for various system components. This is to
57 * make sure one CTL instance talks with another, one ZFS instance talks
67 * HA communication event notification. These are events generated by the
68 * HA communication subsystem.
70 * CTL_HA_EVT_MSG_RECV: Message received by the other node.
71 * CTL_HA_EVT_LINK_CHANGE: Communication channel status changed.
76 CTL_HA_EVT_LINK_CHANGE,
82 CTL_HA_STATUS_SUCCESS,
84 CTL_HA_STATUS_INVALID,
85 CTL_HA_STATUS_DISCONNECT,
97 typedef void (*ctl_ha_dt_cb)(struct ctl_ha_dt_req *);
99 struct ctl_ha_dt_req {
100 ctl_ha_dt_cmd command;
102 ctl_ha_dt_cb callback;
107 TAILQ_ENTRY(ctl_ha_dt_req) links;
111 ctl_ha_status ctl_ha_msg_init(struct ctl_softc *softc);
112 void ctl_ha_msg_shutdown(struct ctl_softc *softc);
113 ctl_ha_status ctl_ha_msg_destroy(struct ctl_softc *softc);
115 typedef void (*ctl_evt_handler)(ctl_ha_channel channel, ctl_ha_event event,
117 void ctl_ha_register_evthandler(ctl_ha_channel channel,
118 ctl_evt_handler handler);
120 ctl_ha_status ctl_ha_msg_register(ctl_ha_channel channel,
121 ctl_evt_handler handler);
122 ctl_ha_status ctl_ha_msg_recv(ctl_ha_channel channel, void *addr,
123 size_t len, int wait);
124 ctl_ha_status ctl_ha_msg_send(ctl_ha_channel channel, const void *addr,
125 size_t len, int wait);
126 ctl_ha_status ctl_ha_msg_send2(ctl_ha_channel channel, const void *addr,
127 size_t len, const void *addr2, size_t len2, int wait);
128 ctl_ha_status ctl_ha_msg_abort(ctl_ha_channel channel);
129 ctl_ha_status ctl_ha_msg_deregister(ctl_ha_channel channel);
131 struct ctl_ha_dt_req * ctl_dt_req_alloc(void);
132 void ctl_dt_req_free(struct ctl_ha_dt_req *req);
133 ctl_ha_status ctl_dt_single(struct ctl_ha_dt_req *req);
136 CTL_HA_LINK_OFFLINE = 0x00,
137 CTL_HA_LINK_UNKNOWN = 0x01,
138 CTL_HA_LINK_ONLINE = 0x02
141 #endif /* _CTL_HA_H_ */