FreeBSD/Linux Kernel Cross Reference
sys/geom/geom_slice.h
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: releng/12.0/sys/geom/geom_slice.h 326270 2017-11-27 15:17:37Z pfg $
38 */
39
40 #ifndef _GEOM_GEOM_SLICE_H_
41 #define _GEOM_GEOM_SLICE_H_
42
43 struct g_slice {
44 off_t offset;
45 off_t length;
46 u_int sectorsize;
47 struct g_provider *provider;
48 };
49
50 struct g_slice_hot {
51 off_t offset;
52 off_t length;
53 int ract;
54 int dact;
55 int wact;
56 };
57
58 typedef int g_slice_start_t (struct bio *bp);
59
60 struct 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
73 g_dumpconf_t g_slice_dumpconf;
74 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);
75 void g_slice_spoiled(struct g_consumer *cp);
76 void 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
80 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);
81
82 int 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
88 int g_slice_destroy_geom(struct gctl_req *req, struct g_class *mp, struct g_geom *gp);
89
90 void g_slice_finish_hot(struct bio *bp);
91
92 #endif /* _GEOM_GEOM_SLICE_H_ */
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