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09c999b155
A careful reading of the GPT standard shows that one may have fewer than 128 entries in your GPT table. While the standard requires that we reserve enough space (32 512-byte-LBAs or 4 4096-byte-LBAs), it also explicitly allows one to specify fewer actual partitions (since that controls what is in the CRC). It requires that the first LBA to be 32 (512 sectors) or 6 (4k sectors) or larger. That requirement is not enforced (it's not listed as one of validation criteria for the GPT). We should likely do so in the future. To that end, allow a default number of entries to use (defent) on creation to be different (larger) than the minimum number of legal entries. For gpt, these numbers work out to 128 and 1 respectively. For all the others, make minent == defent so this is a nop for those partitioning schemes. Sponsored by: Netflix Reviewed by: zlei, emaste Differential Revision: https://reviews.freebsd.org/D42246
259 lines
10 KiB
C
259 lines
10 KiB
C
/*-
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* SPDX-License-Identifier: BSD-2-Clause
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*
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* Copyright (c) 2006-2008 Marcel Moolenaar
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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*
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#ifndef _GEOM_PART_H_
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#define _GEOM_PART_H_
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#define G_PART_TRACE(args) g_trace args
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#define G_PART_PROBE_PRI_LOW -10
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#define G_PART_PROBE_PRI_NORM -5
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#define G_PART_PROBE_PRI_HIGH 0
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enum g_part_alias {
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G_PART_ALIAS_APPLE_APFS, /* An Apple APFS partition. */
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G_PART_ALIAS_APPLE_BOOT, /* An Apple boot partition entry. */
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G_PART_ALIAS_APPLE_CORE_STORAGE,/* An Apple Core Storage partition. */
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G_PART_ALIAS_APPLE_HFS, /* An HFS+ file system entry. */
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G_PART_ALIAS_APPLE_LABEL, /* An Apple label partition entry. */
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G_PART_ALIAS_APPLE_RAID, /* An Apple RAID partition entry. */
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G_PART_ALIAS_APPLE_RAID_OFFLINE,/* An Apple RAID (offline) part entry.*/
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G_PART_ALIAS_APPLE_TV_RECOVERY, /* An Apple TV recovery part entry. */
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G_PART_ALIAS_APPLE_UFS, /* An Apple UFS partition entry. */
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G_PART_ALIAS_APPLE_ZFS, /* An Apple ZFS partition entry.
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Also used for Solaris /usr partition. */
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G_PART_ALIAS_BIOS_BOOT, /* A GRUB 2 boot partition entry. */
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G_PART_ALIAS_CHROMEOS_FIRMWARE, /* A ChromeOS firmware part. entry. */
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G_PART_ALIAS_CHROMEOS_KERNEL, /* A ChromeOS Kernel part. entry. */
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G_PART_ALIAS_CHROMEOS_RESERVED, /* ChromeOS. Reserved for future use. */
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G_PART_ALIAS_CHROMEOS_ROOT, /* A ChromeOS root part. entry. */
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G_PART_ALIAS_DFBSD, /* A DfBSD label32 partition entry */
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G_PART_ALIAS_DFBSD64, /* A DfBSD label64 partition entry */
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G_PART_ALIAS_DFBSD_CCD, /* A DfBSD CCD partition entry */
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G_PART_ALIAS_DFBSD_HAMMER, /* A DfBSD HAMMER FS partition entry */
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G_PART_ALIAS_DFBSD_HAMMER2, /* A DfBSD HAMMER2 FS partition entry */
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G_PART_ALIAS_DFBSD_LEGACY, /* A DfBSD legacy partition entry */
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G_PART_ALIAS_DFBSD_SWAP, /* A DfBSD swap partition entry */
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G_PART_ALIAS_DFBSD_UFS, /* A DfBSD UFS partition entry */
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G_PART_ALIAS_DFBSD_VINUM, /* A DfBSD Vinum partition entry */
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G_PART_ALIAS_EBR, /* A EBR partition entry. */
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G_PART_ALIAS_EFI, /* A EFI system partition entry. */
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G_PART_ALIAS_FREEBSD, /* A BSD labeled partition entry. */
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G_PART_ALIAS_FREEBSD_BOOT, /* A FreeBSD boot partition entry. */
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G_PART_ALIAS_FREEBSD_NANDFS, /* A FreeBSD nandfs partition entry. */
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G_PART_ALIAS_FREEBSD_SWAP, /* A swap partition entry. */
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G_PART_ALIAS_FREEBSD_UFS, /* A UFS/UFS2 file system entry. */
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G_PART_ALIAS_FREEBSD_VINUM, /* A Vinum partition entry. */
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G_PART_ALIAS_FREEBSD_ZFS, /* A ZFS file system entry. */
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G_PART_ALIAS_HIFIVE_FSBL, /* HiFive First Stage Bootloader */
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G_PART_ALIAS_HIFIVE_BBL, /* HiFive Second Stage Bootloader */
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G_PART_ALIAS_LINUX_DATA, /* A Linux data partition entry. */
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G_PART_ALIAS_LINUX_LVM, /* A Linux LVM partition entry. */
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G_PART_ALIAS_LINUX_RAID, /* A Linux RAID partition entry. */
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G_PART_ALIAS_LINUX_SWAP, /* A Linux swap partition entry. */
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G_PART_ALIAS_MBR, /* A MBR (extended) partition entry. */
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G_PART_ALIAS_MS_BASIC_DATA, /* A Microsoft Data part. entry. */
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G_PART_ALIAS_MS_FAT16, /* A Microsoft FAT16 partition entry. */
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G_PART_ALIAS_MS_FAT32, /* A Microsoft FAT32 partition entry. */
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G_PART_ALIAS_MS_FAT32LBA, /* A Microsoft FAT32 LBA partition entry */
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G_PART_ALIAS_MS_LDM_DATA, /* A Microsoft LDM Data part. entry. */
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G_PART_ALIAS_MS_LDM_METADATA, /* A Microsoft LDM Metadata entry. */
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G_PART_ALIAS_MS_NTFS, /* A Microsoft NTFS partition entry */
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G_PART_ALIAS_MS_RECOVERY, /* A Microsoft recovery part. entry. */
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G_PART_ALIAS_MS_RESERVED, /* A Microsoft Reserved part. entry. */
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G_PART_ALIAS_MS_SPACES, /* A Microsoft Spaces part. entry. */
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G_PART_ALIAS_NETBSD_CCD, /* A NetBSD CCD partition entry. */
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G_PART_ALIAS_NETBSD_CGD, /* A NetBSD CGD partition entry. */
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G_PART_ALIAS_NETBSD_FFS, /* A NetBSD FFS partition entry. */
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G_PART_ALIAS_NETBSD_LFS, /* A NetBSD LFS partition entry. */
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G_PART_ALIAS_NETBSD_RAID, /* A NetBSD RAID partition entry. */
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G_PART_ALIAS_NETBSD_SWAP, /* A NetBSD swap partition entry. */
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G_PART_ALIAS_OPENBSD_DATA, /* An OpenBSD data partition entry. */
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G_PART_ALIAS_PREP_BOOT, /* A PREP/CHRP boot partition entry. */
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G_PART_ALIAS_SOLARIS_BOOT, /* A Solaris boot partition entry. */
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G_PART_ALIAS_SOLARIS_ROOT, /* A Solaris root partition entry. */
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G_PART_ALIAS_SOLARIS_SWAP, /* A Solaris swap partition entry. */
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G_PART_ALIAS_SOLARIS_BACKUP, /* A Solaris backup partition entry. */
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G_PART_ALIAS_SOLARIS_VAR, /* A Solaris /var partition entry. */
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G_PART_ALIAS_SOLARIS_HOME, /* A Solaris /home partition entry. */
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G_PART_ALIAS_SOLARIS_ALTSEC, /* A Solaris alternate sector partition entry. */
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G_PART_ALIAS_SOLARIS_RESERVED, /* A Solaris reserved partition entry. */
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G_PART_ALIAS_U_BOOT_ENV, /* A U-Boot environment partition entry. */
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G_PART_ALIAS_VMFS, /* A VMware VMFS partition entry */
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G_PART_ALIAS_VMKDIAG, /* A VMware vmkDiagnostic partition entry */
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G_PART_ALIAS_VMRESERVED, /* A VMware reserved partition entry */
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G_PART_ALIAS_VMVSANHDR, /* A VMware vSAN header partition entry */
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/* Keep the following last */
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G_PART_ALIAS_COUNT
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};
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const char *g_part_alias_name(enum g_part_alias);
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/* G_PART scheme (KOBJ class). */
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struct g_part_scheme {
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KOBJ_CLASS_FIELDS;
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size_t gps_entrysz;
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int gps_minent; /* Minimum number of entries possible */
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int gps_defent; /* Default number of entries to create */
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int gps_maxent; /* Maximum number of entries possible */
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int gps_bootcodesz;
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TAILQ_ENTRY(g_part_scheme) scheme_list;
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};
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struct g_part_entry {
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LIST_ENTRY(g_part_entry) gpe_entry;
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struct g_provider *gpe_pp; /* Corresponding provider. */
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off_t gpe_offset; /* Byte offset. */
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quad_t gpe_start; /* First LBA of partition. */
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quad_t gpe_end; /* Last LBA of partition. */
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int gpe_index;
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bool gpe_created:1; /* Entry is newly created. */
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bool gpe_deleted:1; /* Entry has been deleted. */
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bool gpe_modified:1; /* Entry has been modified. */
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bool gpe_internal:1; /* Entry is not a used entry. */
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};
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/* G_PART table (KOBJ instance). */
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struct g_part_table {
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KOBJ_FIELDS;
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struct g_part_scheme *gpt_scheme;
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struct g_geom *gpt_gp;
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LIST_HEAD(, g_part_entry) gpt_entry;
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quad_t gpt_first; /* First allocatable LBA */
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quad_t gpt_last; /* Last allocatable LBA */
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int gpt_entries;
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/*
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* gpt_smhead and gpt_smtail are bitmaps representing the first
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* 32 sectors on the disk (gpt_smhead) and the last 32 sectors
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* on the disk (gpt_smtail). These maps are used by the commit
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* verb to clear sectors previously used by a scheme after the
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* partitioning scheme has been destroyed.
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*/
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uint32_t gpt_smhead;
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uint32_t gpt_smtail;
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/*
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* gpt_sectors and gpt_heads are the fixed or synchesized number
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* of sectors per track and heads (resp) that make up a disks
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* geometry. This is to support partitioning schemes as well as
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* file systems that work on a geometry. The MBR scheme and the
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* MS-DOS (FAT) file system come to mind.
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* We keep track of whether the geometry is fixed or synchesized
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* so that a partitioning scheme can correct the synthesized
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* geometry, based on the on-disk metadata.
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*/
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uint32_t gpt_sectors;
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uint32_t gpt_heads;
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int gpt_depth; /* Sub-partitioning level. */
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bool gpt_isleaf:1; /* Cannot be sub-partitioned. */
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bool gpt_created:1; /* Newly created. */
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bool gpt_modified:1; /* Table changes have been made. */
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bool gpt_opened:1; /* Permissions obtained. */
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bool gpt_fixgeom:1; /* Geometry is fixed. */
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bool gpt_corrupt:1; /* Table is corrupt. */
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};
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struct g_part_entry *g_part_new_entry(struct g_part_table *, int, quad_t,
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quad_t);
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enum g_part_ctl {
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G_PART_CTL_NONE,
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G_PART_CTL_ADD,
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G_PART_CTL_BOOTCODE,
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G_PART_CTL_COMMIT,
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G_PART_CTL_CREATE,
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G_PART_CTL_DELETE,
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G_PART_CTL_DESTROY,
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G_PART_CTL_MODIFY,
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G_PART_CTL_MOVE,
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G_PART_CTL_RECOVER,
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G_PART_CTL_RESIZE,
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G_PART_CTL_SET,
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G_PART_CTL_UNDO,
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G_PART_CTL_UNSET
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};
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/* G_PART ctlreq parameters. */
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#define G_PART_PARM_ENTRIES 0x0001
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#define G_PART_PARM_FLAGS 0x0002
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#define G_PART_PARM_GEOM 0x0004
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#define G_PART_PARM_INDEX 0x0008
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#define G_PART_PARM_LABEL 0x0010
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#define G_PART_PARM_OUTPUT 0x0020
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#define G_PART_PARM_PROVIDER 0x0040
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#define G_PART_PARM_SCHEME 0x0080
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#define G_PART_PARM_SIZE 0x0100
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#define G_PART_PARM_START 0x0200
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#define G_PART_PARM_TYPE 0x0400
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#define G_PART_PARM_VERSION 0x0800
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#define G_PART_PARM_BOOTCODE 0x1000
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#define G_PART_PARM_ATTRIB 0x2000
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#define G_PART_PARM_FORCE 0x4000
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#define G_PART_PARM_SKIP_DSN 0x8000
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struct g_part_parms {
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unsigned int gpp_parms;
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unsigned int gpp_entries;
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const char *gpp_flags;
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struct g_geom *gpp_geom;
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unsigned int gpp_index;
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const char *gpp_label;
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struct g_provider *gpp_provider;
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struct g_part_scheme *gpp_scheme;
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quad_t gpp_size;
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quad_t gpp_start;
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const char *gpp_type;
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unsigned int gpp_version;
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const void *gpp_codeptr;
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unsigned int gpp_codesize;
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const char *gpp_attrib;
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unsigned int gpp_force;
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unsigned int gpp_skip_dsn;
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};
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void g_part_geometry_heads(off_t, u_int, off_t *, u_int *);
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int g_part_modevent(module_t, int, struct g_part_scheme *);
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extern char g_part_separator[];
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#define G_PART_SCHEME_DECLARE(name) \
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static int name##_modevent(module_t mod, int tp, void *d) \
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{ \
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return (g_part_modevent(mod, tp, d)); \
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} \
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static moduledata_t name##_mod = { \
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#name, \
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name##_modevent, \
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&name##_scheme \
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}; \
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DECLARE_MODULE(name, name##_mod, SI_SUB_DRIVERS, SI_ORDER_ANY); \
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MODULE_DEPEND(name, g_part, 0, 0, 0)
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#endif /* !_GEOM_PART_H_ */
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