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 * $FreeBSD$ 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_EFI, /* A EFI system partition entry. */ 40 G_PART_ALIAS_FREEBSD, /* A BSD labeled partition entry. */ 41 G_PART_ALIAS_FREEBSD_BOOT, /* A FreeBSD boot partition entry. */ 42 G_PART_ALIAS_FREEBSD_SWAP, /* A swap partition entry. */ 43 G_PART_ALIAS_FREEBSD_UFS, /* A UFS/UFS2 file system entry. */ 44 G_PART_ALIAS_FREEBSD_VINUM, /* A Vinum partition entry. */ 45 G_PART_ALIAS_FREEBSD_ZFS, /* A ZFS file system entry. */ 46 G_PART_ALIAS_MBR, /* A MBR (extended) partition entry. */ 47 /* Keep the following last */ 48 G_PART_ALIAS_COUNT 49 }; 50 51 const char *g_part_alias_name(enum g_part_alias); 52 53 /* G_PART scheme (KOBJ class). */ 54 struct g_part_scheme { 55 KOBJ_CLASS_FIELDS; 56 size_t gps_entrysz; 57 int gps_minent; 58 int gps_maxent; 59 int gps_bootcodesz; 60 TAILQ_ENTRY(g_part_scheme) scheme_list; 61 }; 62 63 struct g_part_entry { 64 LIST_ENTRY(g_part_entry) gpe_entry; 65 struct g_provider *gpe_pp; /* Corresponding provider. */ 66 off_t gpe_offset; /* Byte offset. */ 67 quad_t gpe_start; /* First LBA of partition. */ 68 quad_t gpe_end; /* Last LBA of partition. */ 69 int gpe_index; 70 int gpe_created:1; /* Entry is newly created. */ 71 int gpe_deleted:1; /* Entry has been deleted. */ 72 int gpe_modified:1; /* Entry has been modified. */ 73 int gpe_internal:1; /* Entry is not a used entry. */ 74 }; 75 76 /* G_PART table (KOBJ instance). */ 77 struct g_part_table { 78 KOBJ_FIELDS; 79 struct g_part_scheme *gpt_scheme; 80 struct g_geom *gpt_gp; 81 LIST_HEAD(, g_part_entry) gpt_entry; 82 quad_t gpt_first; /* First allocatable LBA */ 83 quad_t gpt_last; /* Last allocatable LBA */ 84 int gpt_entries; 85 /* 86 * gpt_smhead and gpt_smtail are bitmaps representing the first 87 * 32 sectors on the disk (gpt_smhead) and the last 32 sectors 88 * on the disk (gpt_smtail). These maps are used by the commit 89 * verb to clear sectors previously used by a scheme after the 90 * partitioning scheme has been destroyed. 91 */ 92 uint32_t gpt_smhead; 93 uint32_t gpt_smtail; 94 /* 95 * gpt_sectors and gpt_heads are the fixed or synchesized number 96 * of sectors per track and heads (resp) that make up a disks 97 * geometry. This is to support partitioning schemes as well as 98 * file systems that work on a geometry. The MBR scheme and the 99 * MS-DOS (FAT) file system come to mind. 100 * We keep track of whether the geometry is fixed or synchesized 101 * so that a partitioning scheme can correct the synthesized 102 * geometry, based on the on-disk metadata. 103 */ 104 uint32_t gpt_sectors; 105 uint32_t gpt_heads; 106 /* 107 * gpt_offset holds the absolute block address of the scheme 108 * on disk. Some partitioning schemes (historically) use 109 * absolute addressing. Relative addresses are obtained by 110 * subtracting gpt_offset from the absolute addresses. 111 */ 112 uint64_t gpt_offset; 113 114 int gpt_depth; /* Sub-partitioning level. */ 115 int gpt_isleaf:1; /* Cannot be sub-partitioned. */ 116 int gpt_created:1; /* Newly created. */ 117 int gpt_modified:1; /* Table changes have been made. */ 118 int gpt_opened:1; /* Permissions obtained. */ 119 int gpt_fixgeom:1; /* Geometry is fixed. */ 120 }; 121 122 struct g_part_entry *g_part_new_entry(struct g_part_table *, int, quad_t, 123 quad_t); 124 125 /* G_PART ctlreq parameters. */ 126 #define G_PART_PARM_ENTRIES 0x0001 127 #define G_PART_PARM_FLAGS 0x0002 128 #define G_PART_PARM_GEOM 0x0004 129 #define G_PART_PARM_INDEX 0x0008 130 #define G_PART_PARM_LABEL 0x0010 131 #define G_PART_PARM_OUTPUT 0x0020 132 #define G_PART_PARM_PROVIDER 0x0040 133 #define G_PART_PARM_SCHEME 0x0080 134 #define G_PART_PARM_SIZE 0x0100 135 #define G_PART_PARM_START 0x0200 136 #define G_PART_PARM_TYPE 0x0400 137 #define G_PART_PARM_VERSION 0x0800 138 #define G_PART_PARM_BOOTCODE 0x1000 139 #define G_PART_PARM_ATTRIB 0x2000 140 141 struct g_part_parms { 142 unsigned int gpp_parms; 143 unsigned int gpp_entries; 144 const char *gpp_flags; 145 struct g_geom *gpp_geom; 146 unsigned int gpp_index; 147 const char *gpp_label; 148 struct g_provider *gpp_provider; 149 struct g_part_scheme *gpp_scheme; 150 quad_t gpp_size; 151 quad_t gpp_start; 152 const char *gpp_type; 153 unsigned int gpp_version; 154 const void *gpp_codeptr; 155 unsigned int gpp_codesize; 156 const char *gpp_attrib; 157 }; 158 159 void g_part_geometry_heads(off_t, u_int, off_t *, u_int *); 160 161 int g_part_modevent(module_t, int, struct g_part_scheme *); 162 163 #define G_PART_SCHEME_DECLARE(name) \ 164 static int name##_modevent(module_t mod, int tp, void *d) \ 165 { \ 166 return (g_part_modevent(mod, tp, d)); \ 167 } \ 168 static moduledata_t name##_mod = { \ 169 #name, \ 170 name##_modevent, \ 171 &name##_scheme \ 172 }; \ 173 DECLARE_MODULE(name, name##_mod, SI_SUB_DRIVERS, SI_ORDER_ANY) 174 175 #endif /* !_GEOM_PART_H_ */ 176