f352a0d45f
on i386 and amd64 machines. The overall process is that /boot/pmbr lives
in the PMBR (similar to /boot/mbr for MBR disks) and is responsible for
locating and loading /boot/gptboot. /boot/gptboot is similar to /boot/boot
except that it groks GPT rather than MBR + bsdlabel. Unlike /boot/boot,
/boot/gptboot lives in its own dedicated GPT partition with a new
"FreeBSD boot" type. This partition does not have a fixed size in that
/boot/pmbr will load the entire partition into the lower 640k. However,
it is limited in that it can only be 545k. That's still a lot better than
the current 7.5k limit for boot2 on MBR. gptboot mostly acts just like
boot2 in that it reads /boot.config and loads up /boot/loader. Some more
details:
- Include uuid_equal() and uuid_is_nil() in libstand.
- Add a new 'boot' command to gpt(8) which makes a GPT disk bootable using
/boot/pmbr and /boot/gptboot. Note that the disk must have some free
space for the boot partition.
- This required exposing the backend of the 'add' function as a
gpt_add_part() function to the rest of gpt(8). 'boot' uses this to
create a boot partition if needed.
- Don't cripple cgbase() in the UFS boot code for /boot/gptboot so that
it can handle a filesystem > 1.5 TB.
- /boot/gptboot has a simple loader (gptldr) that doesn't do any I/O
unlike boot1 since /boot/pmbr loads all of gptboot up front. The
C portion of gptboot (gptboot.c) has been repocopied from boot2.c.
The primary changes are to parse the GPT to find a root filesystem
and to use 64-bit disk addresses. Currently gptboot assumes that the
first UFS partition on the disk is the / filesystem, but this algorithm
will likely be improved in the future.
- Teach the biosdisk driver in /boot/loader to understand GPT tables.
GPT partitions are identified as 'disk0pX:' (e.g. disk0p2:) which is
similar to the /dev names the kernel uses (e.g. /dev/ad0p2).
- Add a new "freebsd-boot" alias to g_part() for the new boot UUID.
MFC after: 1 month
Discussed with: marcel (some things might still change, but am committing
what I have so far)
124 lines
4.6 KiB
C
124 lines
4.6 KiB
C
/*-
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* Copyright (c) 2002 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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* $FreeBSD$
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*/
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#ifndef _SYS_GPT_H_
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#define _SYS_GPT_H_
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#include <sys/uuid.h>
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struct gpt_hdr {
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char hdr_sig[8];
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#define GPT_HDR_SIG "EFI PART"
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uint32_t hdr_revision;
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#define GPT_HDR_REVISION 0x00010000
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uint32_t hdr_size;
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uint32_t hdr_crc_self;
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uint32_t __reserved;
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uint64_t hdr_lba_self;
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uint64_t hdr_lba_alt;
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uint64_t hdr_lba_start;
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uint64_t hdr_lba_end;
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struct uuid hdr_uuid;
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uint64_t hdr_lba_table;
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uint32_t hdr_entries;
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uint32_t hdr_entsz;
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uint32_t hdr_crc_table;
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/*
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* The header as defined in the EFI spec is not a multiple of 8 bytes
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* and given that the alignment requirement is on an 8 byte boundary,
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* padding will happen. We make the padding explicit so that we can
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* correct the value returned by sizeof() when we put the size of the
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* header in field hdr_size, or otherwise use offsetof().
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*/
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uint32_t padding;
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};
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struct gpt_ent {
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struct uuid ent_type;
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struct uuid ent_uuid;
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uint64_t ent_lba_start;
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uint64_t ent_lba_end;
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uint64_t ent_attr;
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#define GPT_ENT_ATTR_PLATFORM (1ULL << 0)
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uint16_t ent_name[36]; /* UTF-16. */
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};
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#define GPT_ENT_TYPE_UNUSED \
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{0x00000000,0x0000,0x0000,0x00,0x00,{0x00,0x00,0x00,0x00,0x00,0x00}}
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#define GPT_ENT_TYPE_EFI \
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{0xc12a7328,0xf81f,0x11d2,0xba,0x4b,{0x00,0xa0,0xc9,0x3e,0xc9,0x3b}}
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#define GPT_ENT_TYPE_MBR \
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{0x024dee41,0x33e7,0x11d3,0x9d,0x69,{0x00,0x08,0xc7,0x81,0xf3,0x9f}}
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#define GPT_ENT_TYPE_FREEBSD \
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{0x516e7cb4,0x6ecf,0x11d6,0x8f,0xf8,{0x00,0x02,0x2d,0x09,0x71,0x2b}}
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#define GPT_ENT_TYPE_FREEBSD_SWAP \
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{0x516e7cb5,0x6ecf,0x11d6,0x8f,0xf8,{0x00,0x02,0x2d,0x09,0x71,0x2b}}
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#define GPT_ENT_TYPE_FREEBSD_UFS \
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{0x516e7cb6,0x6ecf,0x11d6,0x8f,0xf8,{0x00,0x02,0x2d,0x09,0x71,0x2b}}
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#define GPT_ENT_TYPE_FREEBSD_VINUM \
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{0x516e7cb8,0x6ecf,0x11d6,0x8f,0xf8,{0x00,0x02,0x2d,0x09,0x71,0x2b}}
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#define GPT_ENT_TYPE_FREEBSD_ZFS \
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{0x516e7cba,0x6ecf,0x11d6,0x8f,0xf8,{0x00,0x02,0x2d,0x09,0x71,0x2b}}
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#define GPT_ENT_TYPE_FREEBSD_BOOT \
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{0x83bd6b9d,0x7f41,0x11dc,0xbe,0x0b,{0x00,0x15,0x60,0xb8,0x4f,0x0f}}
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/*
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* The following are unused but documented here to avoid reuse.
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*
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* GPT_ENT_TYPE_FREEBSD_UFS2 \
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* {0x516e7cb7,0x6ecf,0x11d6,0x8f,0xf8,{0x00,0x02,0x2d,0x09,0x71,0x2b}}
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*/
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/*
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* Foreign partition types that we're likely to encounter. Note that Linux
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* apparently choose to share data partitions with MS. I don't what the
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* advantage might be. I can see how sharing swap partitions is advantageous
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* though.
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*/
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#define GPT_ENT_TYPE_MS_RESERVED \
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{0xe3c9e316,0x0b5c,0x4db8,0x81,0x7d,{0xf9,0x2d,0xf0,0x02,0x15,0xae}}
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#define GPT_ENT_TYPE_MS_BASIC_DATA \
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{0xebd0a0a2,0xb9e5,0x4433,0x87,0xc0,{0x68,0xb6,0xb7,0x26,0x99,0xc7}}
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#define GPT_ENT_TYPE_MS_LDM_METADATA \
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{0x5808c8aa,0x7e8f,0x42e0,0x85,0xd2,{0xe1,0xe9,0x04,0x34,0xcf,0xb3}}
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#define GPT_ENT_TYPE_MS_LDM_DATA \
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{0xaf9b60a0,0x1431,0x4f62,0xbc,0x68,{0x33,0x11,0x71,0x4a,0x69,0xad}}
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#define GPT_ENT_TYPE_LINUX_DATA GPT_ENT_TYPE_MS_BASIC_DATA
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#define GPT_ENT_TYPE_LINUX_RAID \
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{0xa19d880f,0x05fc,0x4d3b,0xa0,0x06,{0x74,0x3f,0x0f,0x84,0x91,0x1e}}
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#define GPT_ENT_TYPE_LINUX_SWAP \
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{0x0657fd6d,0xa4ab,0x43c4,0x84,0xe5,{0x09,0x33,0xc8,0x4b,0x4f,0x4f}}
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#define GPT_ENT_TYPE_LINUX_LVM \
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{0xe6d6d379,0xf507,0x44c2,0xa2,0x3c,{0x23,0x8f,0x2a,0x3d,0xf9,0x28}}
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#define GPT_ENT_TYPE_APPLE_HFS \
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{0x48465300,0x0000,0x11aa,0xaa,0x11,{0x00,0x30,0x65,0x43,0xec,0xac}}
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#endif /* _SYS_GPT_H_ */
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