1/*-
2 * SPDX-License-Identifier: BSD-3-Clause
3 *
4 * Copyright (c) 2002 Poul-Henning Kamp
5 * Copyright (c) 2002 Networks Associates Technology, Inc.
6 * All rights reserved.
7 *
8 * This software was developed for the FreeBSD Project by Poul-Henning Kamp
9 * and NAI Labs, the Security Research Division of Network Associates, Inc.
10 * under DARPA/SPAWAR contract N66001-01-C-8035 ("CBOSS"), as part of the
11 * DARPA CHATS research program.
12 *
13 * Redistribution and use in source and binary forms, with or without
14 * modification, are permitted provided that the following conditions
15 * are met:
16 * 1. Redistributions of source code must retain the above copyright
17 *    notice, this list of conditions and the following disclaimer.
18 * 2. Redistributions in binary form must reproduce the above copyright
19 *    notice, this list of conditions and the following disclaimer in the
20 *    documentation and/or other materials provided with the distribution.
21 * 3. The names of the authors may not be used to endorse or promote
22 *    products derived from this software without specific prior written
23 *    permission.
24 *
25 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
26 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
27 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
28 * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
29 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
30 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
31 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
32 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
33 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
34 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
35 * SUCH DAMAGE.
36 *
37 * $FreeBSD$
38 */
39
40#ifndef _GEOM_GEOM_SLICE_H_
41#define _GEOM_GEOM_SLICE_H_
42
43struct g_slice {
44	off_t	offset;
45	off_t	length;
46	u_int	sectorsize;
47	struct	g_provider *provider;
48};
49
50struct g_slice_hot {
51	off_t	offset;
52	off_t	length;
53	int	ract;
54	int	dact;
55	int	wact;
56};
57
58typedef int g_slice_start_t (struct bio *bp);
59
60struct g_slicer {
61	u_int			nslice;
62	u_int			nprovider;
63	struct g_slice		*slices;
64
65	u_int			nhotspot;
66	struct g_slice_hot	*hotspot;
67
68	void			*softc;
69	g_slice_start_t		*start;
70	g_event_t		*hot;
71};
72
73g_dumpconf_t g_slice_dumpconf;
74int 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);
75void g_slice_spoiled(struct g_consumer *cp);
76void g_slice_orphan(struct g_consumer *cp);
77#define G_SLICE_CONFIG_CHECK	0
78#define G_SLICE_CONFIG_SET	1
79#define G_SLICE_CONFIG_FORCE	2
80struct 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);
81
82int g_slice_conf_hot(struct g_geom *gp, u_int idx, off_t offset, off_t length, int ract, int dact, int wact);
83#define G_SLICE_HOT_ALLOW	1
84#define G_SLICE_HOT_DENY	2
85#define G_SLICE_HOT_START	4
86#define G_SLICE_HOT_CALL	8
87
88int g_slice_destroy_geom(struct gctl_req *req, struct g_class *mp, struct g_geom *gp);
89
90void g_slice_finish_hot(struct bio *bp);
91
92#endif /* _GEOM_GEOM_SLICE_H_ */
93