1 /*- 2 * Copyright (c) 2006, 2007 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_SWAP, /* A swap partition entry. */ 42 G_PART_ALIAS_FREEBSD_UFS, /* A UFS/UFS2 file system entry. */ 43 G_PART_ALIAS_FREEBSD_VINUM, /* A Vinum partition entry. */ 44 G_PART_ALIAS_MBR, /* A MBR (extended) partition entry. */ 45 /* Keep the following last */ 46 G_PART_ALIAS_COUNT 47 }; 48 49 const char *g_part_alias_name(enum g_part_alias); 50 51 /* G_PART scheme (KOBJ class). */ 52 struct g_part_scheme { 53 KOBJ_CLASS_FIELDS; 54 size_t gps_entrysz; 55 int gps_minent; 56 int gps_maxent; 57 }; 58 #define G_PART_SCHEME_DECLARE(s) DATA_SET(g_part_scheme_set, s) 59 60 struct g_part_entry { 61 LIST_ENTRY(g_part_entry) gpe_entry; 62 struct g_provider *gpe_pp; /* Corresponding provider. */ 63 off_t gpe_offset; /* Byte offset. */ 64 quad_t gpe_start; /* First LBA of partition. */ 65 quad_t gpe_end; /* Last LBA of partition. */ 66 int gpe_index; 67 int gpe_created:1; /* Entry is newly created. */ 68 int gpe_deleted:1; /* Entry has been deleted. */ 69 int gpe_modified:1; /* Entry has been modified. */ 70 }; 71 72 /* G_PART table (KOBJ instance). */ 73 struct g_part_table { 74 KOBJ_FIELDS; 75 struct g_part_scheme *gpt_scheme; 76 struct g_geom *gpt_gp; 77 LIST_HEAD(, g_part_entry) gpt_entry; 78 quad_t gpt_first; /* First allocatable LBA */ 79 quad_t gpt_last; /* Last allocatable LBA */ 80 int gpt_entries; 81 /* 82 * gpt_smhead and gpt_smtail are bitmaps representing the first 83 * 32 sectors on the disk (gpt_smhead) and the last 32 sectors 84 * on the disk (gpt_smtail). These maps are used by the commit 85 * verb to clear sectors previously used by a scheme after the 86 * partitioning scheme has been destroyed. 87 */ 88 uint32_t gpt_smhead; 89 uint32_t gpt_smtail; 90 /* 91 * gpt_sectors and gpt_heads are the fixed or synchesized number 92 * of sectors per track and heads (resp) that make up a disks 93 * geometry. This is to support partitioning schemes as well as 94 * file systems that work on a geometry. The MBR scheme and the 95 * MS-DOS (FAT) file system come to mind. 96 * We keep track of whether the geometry is fixed or synchesized 97 * so that a partitioning scheme can correct the synthesized 98 * geometry, based on the on-disk metadata. 99 */ 100 uint32_t gpt_sectors; 101 uint32_t gpt_heads; 102 103 int gpt_depth; /* Sub-partitioning level. */ 104 int gpt_isleaf:1; /* Cannot be sub-partitioned. */ 105 int gpt_created:1; /* Newly created. */ 106 int gpt_modified:1; /* Table changes have been made. */ 107 int gpt_opened:1; /* Permissions obtained. */ 108 int gpt_fixgeom:1; /* Geometry is fixed. */ 109 }; 110 111 struct g_part_entry *g_part_new_entry(struct g_part_table *, int, quad_t, 112 quad_t); 113 114 /* G_PART ctlreq parameters. */ 115 #define G_PART_PARM_ENTRIES 0x0001 116 #define G_PART_PARM_FLAGS 0x0002 117 #define G_PART_PARM_GEOM 0x0004 118 #define G_PART_PARM_INDEX 0x0008 119 #define G_PART_PARM_LABEL 0x0010 120 #define G_PART_PARM_OUTPUT 0x0020 121 #define G_PART_PARM_PROVIDER 0x0040 122 #define G_PART_PARM_SCHEME 0x0080 123 #define G_PART_PARM_SIZE 0x0100 124 #define G_PART_PARM_START 0x0200 125 #define G_PART_PARM_TYPE 0x0400 126 #define G_PART_PARM_VERSION 0x0800 127 128 struct g_part_parms { 129 unsigned int gpp_parms; 130 unsigned int gpp_entries; 131 const char *gpp_flags; 132 struct g_geom *gpp_geom; 133 unsigned int gpp_index; 134 const char *gpp_label; 135 struct g_provider *gpp_provider; 136 struct g_part_scheme *gpp_scheme; 137 quad_t gpp_size; 138 quad_t gpp_start; 139 const char *gpp_type; 140 unsigned int gpp_version; 141 }; 142 143 void g_part_geometry_heads(off_t, u_int, off_t *, u_int *); 144 145 #endif /* !_GEOM_PART_H_ */ 146