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_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_ */ 187