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