FreeBSD/Linux Kernel Cross Reference
sys/geom/geom_slice.h
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: src/sys/geom/geom_slice.h,v 1.18 2006/02/18 11:21:17 pjd Exp $
36 */
37
38 #ifndef _GEOM_GEOM_SLICE_H_
39 #define _GEOM_GEOM_SLICE_H_
40
41 struct g_slice {
42 off_t offset;
43 off_t length;
44 u_int sectorsize;
45 struct g_provider *provider;
46 };
47
48 struct g_slice_hot {
49 off_t offset;
50 off_t length;
51 int ract;
52 int dact;
53 int wact;
54 };
55
56 typedef int g_slice_start_t (struct bio *bp);
57
58 struct 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
71 g_dumpconf_t g_slice_dumpconf;
72 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, ...);
73 void g_slice_spoiled(struct g_consumer *cp);
74 void 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
78 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);
79
80 int 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
86 int g_slice_destroy_geom(struct gctl_req *req, struct g_class *mp, struct g_geom *gp);
87
88 void g_slice_finish_hot(struct bio *bp);
89
90 #endif /* _GEOM_GEOM_SLICE_H_ */
91
|