FreeBSD/Linux Kernel Cross Reference
sys/geom/part/g_part.h
1 /*-
2 * Copyright (c) 2006-2008 Marcel Moolenaar
3 * All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 *
9 * 1. Redistributions of source code must retain the above copyright
10 * notice, this list of conditions and the following disclaimer.
11 * 2. Redistributions in binary form must reproduce the above copyright
12 * notice, this list of conditions and the following disclaimer in the
13 * documentation and/or other materials provided with the distribution.
14 *
15 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
16 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
17 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
18 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
19 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
20 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
21 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
22 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
23 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
24 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
25 *
26 * $FreeBSD: releng/8.0/sys/geom/part/g_part.h 188705 2009-02-17 04:12:10Z marcel $
27 */
28
29 #ifndef _GEOM_PART_H_
30 #define _GEOM_PART_H_
31
32 #define G_PART_TRACE(args) g_trace args
33
34 #define G_PART_PROBE_PRI_LOW -10
35 #define G_PART_PROBE_PRI_NORM -5
36 #define G_PART_PROBE_PRI_HIGH 0
37
38 enum g_part_alias {
39 G_PART_ALIAS_APPLE_HFS, /* An HFS file system entry. */
40 G_PART_ALIAS_EFI, /* A EFI system partition entry. */
41 G_PART_ALIAS_FREEBSD, /* A BSD labeled partition entry. */
42 G_PART_ALIAS_FREEBSD_BOOT, /* A FreeBSD boot partition entry. */
43 G_PART_ALIAS_FREEBSD_SWAP, /* A swap partition entry. */
44 G_PART_ALIAS_FREEBSD_UFS, /* A UFS/UFS2 file system entry. */
45 G_PART_ALIAS_FREEBSD_VINUM, /* A Vinum partition entry. */
46 G_PART_ALIAS_FREEBSD_ZFS, /* A ZFS file system entry. */
47 G_PART_ALIAS_MBR, /* A MBR (extended) partition entry. */
48 /* Keep the following last */
49 G_PART_ALIAS_COUNT
50 };
51
52 const char *g_part_alias_name(enum g_part_alias);
53
54 /* G_PART scheme (KOBJ class). */
55 struct g_part_scheme {
56 KOBJ_CLASS_FIELDS;
57 size_t gps_entrysz;
58 int gps_minent;
59 int gps_maxent;
60 int gps_bootcodesz;
61 TAILQ_ENTRY(g_part_scheme) scheme_list;
62 };
63
64 struct g_part_entry {
65 LIST_ENTRY(g_part_entry) gpe_entry;
66 struct g_provider *gpe_pp; /* Corresponding provider. */
67 off_t gpe_offset; /* Byte offset. */
68 quad_t gpe_start; /* First LBA of partition. */
69 quad_t gpe_end; /* Last LBA of partition. */
70 int gpe_index;
71 int gpe_created:1; /* Entry is newly created. */
72 int gpe_deleted:1; /* Entry has been deleted. */
73 int gpe_modified:1; /* Entry has been modified. */
74 int gpe_internal:1; /* Entry is not a used entry. */
75 };
76
77 /* G_PART table (KOBJ instance). */
78 struct g_part_table {
79 KOBJ_FIELDS;
80 struct g_part_scheme *gpt_scheme;
81 struct g_geom *gpt_gp;
82 LIST_HEAD(, g_part_entry) gpt_entry;
83 quad_t gpt_first; /* First allocatable LBA */
84 quad_t gpt_last; /* Last allocatable LBA */
85 int gpt_entries;
86 /*
87 * gpt_smhead and gpt_smtail are bitmaps representing the first
88 * 32 sectors on the disk (gpt_smhead) and the last 32 sectors
89 * on the disk (gpt_smtail). These maps are used by the commit
90 * verb to clear sectors previously used by a scheme after the
91 * partitioning scheme has been destroyed.
92 */
93 uint32_t gpt_smhead;
94 uint32_t gpt_smtail;
95 /*
96 * gpt_sectors and gpt_heads are the fixed or synchesized number
97 * of sectors per track and heads (resp) that make up a disks
98 * geometry. This is to support partitioning schemes as well as
99 * file systems that work on a geometry. The MBR scheme and the
100 * MS-DOS (FAT) file system come to mind.
101 * We keep track of whether the geometry is fixed or synchesized
102 * so that a partitioning scheme can correct the synthesized
103 * geometry, based on the on-disk metadata.
104 */
105 uint32_t gpt_sectors;
106 uint32_t gpt_heads;
107
108 int gpt_depth; /* Sub-partitioning level. */
109 int gpt_isleaf:1; /* Cannot be sub-partitioned. */
110 int gpt_created:1; /* Newly created. */
111 int gpt_modified:1; /* Table changes have been made. */
112 int gpt_opened:1; /* Permissions obtained. */
113 int gpt_fixgeom:1; /* Geometry is fixed. */
114 };
115
116 struct g_part_entry *g_part_new_entry(struct g_part_table *, int, quad_t,
117 quad_t);
118
119 enum g_part_ctl {
120 G_PART_CTL_NONE,
121 G_PART_CTL_ADD,
122 G_PART_CTL_BOOTCODE,
123 G_PART_CTL_COMMIT,
124 G_PART_CTL_CREATE,
125 G_PART_CTL_DELETE,
126 G_PART_CTL_DESTROY,
127 G_PART_CTL_MODIFY,
128 G_PART_CTL_MOVE,
129 G_PART_CTL_RECOVER,
130 G_PART_CTL_RESIZE,
131 G_PART_CTL_SET,
132 G_PART_CTL_UNDO,
133 G_PART_CTL_UNSET
134 };
135
136 /* G_PART ctlreq parameters. */
137 #define G_PART_PARM_ENTRIES 0x0001
138 #define G_PART_PARM_FLAGS 0x0002
139 #define G_PART_PARM_GEOM 0x0004
140 #define G_PART_PARM_INDEX 0x0008
141 #define G_PART_PARM_LABEL 0x0010
142 #define G_PART_PARM_OUTPUT 0x0020
143 #define G_PART_PARM_PROVIDER 0x0040
144 #define G_PART_PARM_SCHEME 0x0080
145 #define G_PART_PARM_SIZE 0x0100
146 #define G_PART_PARM_START 0x0200
147 #define G_PART_PARM_TYPE 0x0400
148 #define G_PART_PARM_VERSION 0x0800
149 #define G_PART_PARM_BOOTCODE 0x1000
150 #define G_PART_PARM_ATTRIB 0x2000
151
152 struct g_part_parms {
153 unsigned int gpp_parms;
154 unsigned int gpp_entries;
155 const char *gpp_flags;
156 struct g_geom *gpp_geom;
157 unsigned int gpp_index;
158 const char *gpp_label;
159 struct g_provider *gpp_provider;
160 struct g_part_scheme *gpp_scheme;
161 quad_t gpp_size;
162 quad_t gpp_start;
163 const char *gpp_type;
164 unsigned int gpp_version;
165 const void *gpp_codeptr;
166 unsigned int gpp_codesize;
167 const char *gpp_attrib;
168 };
169
170 void g_part_geometry_heads(off_t, u_int, off_t *, u_int *);
171
172 int g_part_modevent(module_t, int, struct g_part_scheme *);
173
174 #define G_PART_SCHEME_DECLARE(name) \
175 static int name##_modevent(module_t mod, int tp, void *d) \
176 { \
177 return (g_part_modevent(mod, tp, d)); \
178 } \
179 static moduledata_t name##_mod = { \
180 #name, \
181 name##_modevent, \
182 &name##_scheme \
183 }; \
184 DECLARE_MODULE(name, name##_mod, SI_SUB_DRIVERS, SI_ORDER_ANY)
185
186 #endif /* !_GEOM_PART_H_ */
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