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10b1a66934
Include <sys/queue.h> for queue macros Reviewed by: ken, imp Sponsored by: Chelsio Communications Differential Revision: https://reviews.freebsd.org/D42208
145 lines
4.5 KiB
C
145 lines
4.5 KiB
C
/*-
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* SPDX-License-Identifier: BSD-2-Clause
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*
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* Copyright (c) 2003-2009 Silicon Graphics International Corp.
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* Copyright (c) 2011 Spectra Logic Corporation
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* Copyright (c) 2015 Alexander Motin <mav@FreeBSD.org>
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions, and the following disclaimer,
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* without modification.
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* 2. Redistributions in binary form must reproduce at minimum a disclaimer
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* substantially similar to the "NO WARRANTY" disclaimer below
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* ("Disclaimer") and any redistribution must be conditioned upon
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* including a substantially similar Disclaimer requirement for further
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* binary redistribution.
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*
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* NO WARRANTY
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR
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* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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* HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
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* STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
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* IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGES.
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*
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* $Id: //depot/users/kenm/FreeBSD-test2/sys/cam/ctl/ctl_ha.h#1 $
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*/
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#ifndef _CTL_HA_H_
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#define _CTL_HA_H_
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#include <sys/queue.h>
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/*
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* CTL High Availability Modes:
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*
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* CTL_HA_MODE_ACT_STBY: Commands are serialized to the master side.
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* No media access commands on slave side (Standby).
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* CTL_HA_MODE_SER_ONLY: Commands are serialized to the master side.
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* Media can be accessed on both sides.
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* CTL_HA_MODE_XFER: Commands and data are forwarded to the
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* master side for execution.
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*/
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typedef enum {
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CTL_HA_MODE_ACT_STBY,
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CTL_HA_MODE_SER_ONLY,
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CTL_HA_MODE_XFER
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} ctl_ha_mode;
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/*
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* Communication channel IDs for various system components. This is to
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* make sure one CTL instance talks with another, one ZFS instance talks
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* with another, etc.
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*/
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typedef enum {
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CTL_HA_CHAN_CTL,
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CTL_HA_CHAN_DATA,
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CTL_HA_CHAN_MAX
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} ctl_ha_channel;
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/*
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* HA communication event notification. These are events generated by the
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* HA communication subsystem.
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*
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* CTL_HA_EVT_MSG_RECV: Message received by the other node.
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* CTL_HA_EVT_LINK_CHANGE: Communication channel status changed.
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*/
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typedef enum {
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CTL_HA_EVT_NONE,
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CTL_HA_EVT_MSG_RECV,
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CTL_HA_EVT_LINK_CHANGE,
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CTL_HA_EVT_MAX
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} ctl_ha_event;
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typedef enum {
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CTL_HA_STATUS_WAIT,
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CTL_HA_STATUS_SUCCESS,
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CTL_HA_STATUS_ERROR,
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CTL_HA_STATUS_INVALID,
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CTL_HA_STATUS_DISCONNECT,
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CTL_HA_STATUS_BUSY,
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CTL_HA_STATUS_MAX
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} ctl_ha_status;
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typedef enum {
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CTL_HA_DT_CMD_READ,
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CTL_HA_DT_CMD_WRITE,
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} ctl_ha_dt_cmd;
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struct ctl_ha_dt_req;
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typedef void (*ctl_ha_dt_cb)(struct ctl_ha_dt_req *);
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struct ctl_ha_dt_req {
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ctl_ha_dt_cmd command;
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void *context;
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ctl_ha_dt_cb callback;
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int ret;
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uint32_t size;
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uint8_t *local;
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uint8_t *remote;
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TAILQ_ENTRY(ctl_ha_dt_req) links;
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};
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struct ctl_softc;
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ctl_ha_status ctl_ha_msg_init(struct ctl_softc *softc);
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void ctl_ha_msg_shutdown(struct ctl_softc *softc);
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ctl_ha_status ctl_ha_msg_destroy(struct ctl_softc *softc);
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typedef void (*ctl_evt_handler)(ctl_ha_channel channel, ctl_ha_event event,
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int param);
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void ctl_ha_register_evthandler(ctl_ha_channel channel,
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ctl_evt_handler handler);
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ctl_ha_status ctl_ha_msg_register(ctl_ha_channel channel,
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ctl_evt_handler handler);
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ctl_ha_status ctl_ha_msg_recv(ctl_ha_channel channel, void *addr,
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size_t len, int wait);
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ctl_ha_status ctl_ha_msg_send(ctl_ha_channel channel, const void *addr,
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size_t len, int wait);
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ctl_ha_status ctl_ha_msg_send2(ctl_ha_channel channel, const void *addr,
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size_t len, const void *addr2, size_t len2, int wait);
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ctl_ha_status ctl_ha_msg_abort(ctl_ha_channel channel);
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ctl_ha_status ctl_ha_msg_deregister(ctl_ha_channel channel);
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struct ctl_ha_dt_req * ctl_dt_req_alloc(void);
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void ctl_dt_req_free(struct ctl_ha_dt_req *req);
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ctl_ha_status ctl_dt_single(struct ctl_ha_dt_req *req);
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typedef enum {
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CTL_HA_LINK_OFFLINE = 0x00,
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CTL_HA_LINK_UNKNOWN = 0x01,
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CTL_HA_LINK_ONLINE = 0x02
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} ctl_ha_link_state;
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#endif /* _CTL_HA_H_ */
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