/* $OpenBSD: mpathvar.h,v 1.2 2011/04/28 10:43:36 dlg Exp $ */ /* * Copyright (c) 2010 David Gwynne * * Permission to use, copy, modify, and distribute this software for any * purpose with or without fee is hereby granted, provided that the above * copyright notice and this permission notice appear in all copies. * * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. */ #ifndef _SYS_SCSI_MPATH_H_ #define _SYS_SCSI_MPATH_H_ struct mpath_dev; struct mpath_group; struct mpath_ops { char op_name[16]; int (*op_checksense)(struct scsi_xfer *); int (*op_online)(struct scsi_link *); int (*op_offline)(struct scsi_link *); }; struct mpath_path { /* the path driver must set these */ struct scsi_xshandler p_xsh; struct scsi_link *p_link; struct mpath_ops *p_ops; int p_gid; /* the follwoing are private to mpath.c */ TAILQ_ENTRY(mpath_path) p_entry; struct mpath_dev *p_dev; int p_state; }; int mpath_path_probe(struct scsi_link *); int mpath_path_attach(struct mpath_path *); void mpath_path_state(struct mpath_path *, int); int mpath_path_detach(struct mpath_path *); void mpath_start(struct mpath_path *, struct scsi_xfer *); struct device *mpath_bootdv(struct device *); #endif /* _SYS_SCSI_MPATH_H_ */