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freebsd
GitHub Repository: freebsd/freebsd-src
 Path: blob/main/sys/geom/geom_slice.h
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/*-

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 * SPDX-License-Identifier: BSD-3-Clause

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 *

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 * Copyright (c) 2002 Poul-Henning Kamp

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 * Copyright (c) 2002 Networks Associates Technology, Inc.

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 * All rights reserved.

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 *

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 * This software was developed for the FreeBSD Project by Poul-Henning Kamp

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 * and NAI Labs, the Security Research Division of Network Associates, Inc.

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 * under DARPA/SPAWAR contract N66001-01-C-8035 ("CBOSS"), as part of the

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 * DARPA CHATS research program.

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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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 * 2. Redistributions in binary form must reproduce the above copyright

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 *    notice, this list of conditions and the following disclaimer in the

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 *    documentation and/or other materials provided with the distribution.

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 * 3. The names of the authors may not be used to endorse or promote

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 *    products derived from this software without specific prior written

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 *    permission.

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 *

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 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND

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 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE

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 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE

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 * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE

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 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, 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, STRICT

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 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY

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 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF

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 * SUCH DAMAGE.

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 */

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#ifndef _GEOM_GEOM_SLICE_H_

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#define _GEOM_GEOM_SLICE_H_

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struct g_slice {

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	off_t	offset;

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	off_t	length;

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	u_int	sectorsize;

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	struct	g_provider *provider;

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};

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struct g_slice_hot {

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	off_t	offset;

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	off_t	length;

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	int	ract;

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	int	dact;

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	int	wact;

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};

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typedef int g_slice_start_t (struct bio *bp);

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struct g_slicer {

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	u_int			nslice;

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	u_int			nprovider;

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	struct g_slice		*slices;

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	u_int			nhotspot;

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	struct g_slice_hot	*hotspot;

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	void			*softc;

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	g_slice_start_t		*start;

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	g_event_t		*hot;

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};

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g_dumpconf_t g_slice_dumpconf;

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int g_slice_config(struct g_geom *gp, u_int idx, int how, off_t offset, off_t length, u_int sectorsize, const char *fmt, ...) __printflike(7, 8);

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void g_slice_spoiled(struct g_consumer *cp);

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void g_slice_orphan(struct g_consumer *cp);

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#define G_SLICE_CONFIG_CHECK	0

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#define G_SLICE_CONFIG_SET	1

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#define G_SLICE_CONFIG_FORCE	2

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struct g_geom * g_slice_new(struct g_class *mp, u_int slices, struct g_provider *pp, struct g_consumer **cpp, void *extrap, int extra, g_slice_start_t *start);

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int g_slice_conf_hot(struct g_geom *gp, u_int idx, off_t offset, off_t length, int ract, int dact, int wact);

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#define G_SLICE_HOT_ALLOW	1

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#define G_SLICE_HOT_DENY	2

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#define G_SLICE_HOT_START	4

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#define G_SLICE_HOT_CALL	8

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int g_slice_destroy_geom(struct gctl_req *req, struct g_class *mp, struct g_geom *gp);

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void g_slice_finish_hot(struct bio *bp);

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#endif /* _GEOM_GEOM_SLICE_H_ */

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