mirror of
https://github.com/systemd/systemd.git
synced 2024-12-22 17:35:35 +03:00
194 lines
9.1 KiB
Python
194 lines
9.1 KiB
Python
#!/usr/bin/env python3
|
|
# SPDX-License-Identifier: LGPL-2.1-or-later
|
|
|
|
import re
|
|
import sys
|
|
import uuid
|
|
|
|
HEADER = '''\
|
|
| Name | Partition Type UUID | Allowed File Systems | Explanation |
|
|
|------|---------------------|----------------------|-------------|
|
|
'''
|
|
|
|
ARCHITECTURES = {
|
|
'ALPHA': 'Alpha',
|
|
'ARC': 'ARC',
|
|
'ARM': '32-bit ARM',
|
|
'ARM64': '64-bit ARM/AArch64',
|
|
'IA64': 'Itanium/IA-64',
|
|
'LOONGARCH64': 'LoongArch 64-bit',
|
|
'MIPS_LE': '32-bit MIPS LittleEndian (mipsel)',
|
|
'MIPS64_LE': '64-bit MIPS LittleEndian (mips64el)',
|
|
'PARISC': 'HPPA/PARISC',
|
|
'PPC': '32-bit PowerPC',
|
|
'PPC64': '64-bit PowerPC BigEndian',
|
|
'PPC64_LE': '64-bit PowerPC LittleEndian',
|
|
'RISCV32': 'RISC-V 32-bit',
|
|
'RISCV64': 'RISC-V 64-bit',
|
|
'S390': 's390',
|
|
'S390X': 's390x',
|
|
'TILEGX': 'TILE-Gx',
|
|
'X86': 'x86',
|
|
'X86_64': 'amd64/x86_64',
|
|
}
|
|
|
|
TYPES = {
|
|
'ROOT' : 'Root Partition',
|
|
'ROOT_VERITY' : 'Root Verity Partition',
|
|
'ROOT_VERITY_SIG' : 'Root Verity Signature Partition',
|
|
'USR' : '`/usr/` Partition',
|
|
'USR_VERITY' : '`/usr/` Verity Partition',
|
|
'USR_VERITY_SIG' : '`/usr/` Verity Signature Partition',
|
|
|
|
'ESP': 'EFI System Partition',
|
|
'SRV': 'Server Data Partition',
|
|
'VAR': 'Variable Data Partition',
|
|
'TMP': 'Temporary Data Partition',
|
|
'SWAP': 'Swap',
|
|
'HOME': 'Home Partition',
|
|
'USER_HOME': 'Per-user Home Partition',
|
|
'LINUX_GENERIC': 'Generic Linux Data Partition',
|
|
'XBOOTLDR': 'Extended Boot Loader Partition',
|
|
}
|
|
|
|
DESCRIPTIONS = {
|
|
'ROOT': (
|
|
'Any native, optionally in LUKS',
|
|
'On systems with matching architecture, the first partition with this type UUID on the disk '
|
|
'containing the active EFI ESP is automatically mounted to the root directory `/`. '
|
|
'If the partition is encrypted with LUKS or has dm-verity integrity data (see below), the '
|
|
'device mapper file will be named `/dev/mapper/root`.'),
|
|
'USR': (
|
|
'Any native, optionally in LUKS',
|
|
'Similar semantics to root partition, but just the `/usr/` partition.'),
|
|
'ROOT_VERITY': (
|
|
'A dm-verity superblock followed by hash data',
|
|
'Contains dm-verity integrity hash data for the matching root partition. If this feature is '
|
|
'used the partition UUID of the root partition should be the first 128 bits of the root hash '
|
|
'of the dm-verity hash data, and the partition UUID of this dm-verity partition should be the '
|
|
'final 128 bits of it, so that the root partition and its Verity partition can be discovered '
|
|
'easily, simply by specifying the root hash.'),
|
|
'USR_VERITY': (
|
|
'A dm-verity superblock followed by hash data',
|
|
'Similar semantics to root Verity partition, but just for the `/usr/` partition.'),
|
|
'ROOT_VERITY_SIG': (
|
|
'A serialized JSON object, see below',
|
|
'Contains a root hash and a PKCS#7 signature for it, permitting signed dm-verity GPT images.'),
|
|
'USR_VERITY_SIG': (
|
|
'A serialized JSON object, see below',
|
|
'Similar semantics to root Verity signature partition, but just for the `/usr/` partition.'),
|
|
|
|
'ESP': (
|
|
'VFAT',
|
|
'The ESP used for the current boot is automatically mounted to `/efi/` (or `/boot/` as '
|
|
'fallback), unless a different partition is mounted there (possibly via `/etc/fstab`, or '
|
|
'because the Extended Boot Loader Partition — see below — exists) or the directory is '
|
|
'non-empty on the root disk. This partition type is defined by the '
|
|
'[UEFI Specification](http://www.uefi.org/specifications).'),
|
|
'XBOOTLDR': (
|
|
'Typically VFAT',
|
|
'The Extended Boot Loader Partition (XBOOTLDR) used for the current boot is automatically '
|
|
'mounted to `/boot/`, unless a different partition is mounted there (possibly via '
|
|
'`/etc/fstab`) or the directory is non-empty on the root disk. This partition type '
|
|
'is defined by the [Boot Loader '
|
|
'Specification](https://uapi-group.org/specifications/specs/boot_loader_specification).'),
|
|
'SWAP': (
|
|
'Swap, optionally in LUKS',
|
|
'All swap partitions on the disk containing the root partition are automatically enabled. '
|
|
'If the partition is encrypted with LUKS, the device mapper file will be named '
|
|
'`/dev/mapper/swap`. This partition type predates the Discoverable Partitions Specification.'),
|
|
'HOME': (
|
|
'Any native, optionally in LUKS',
|
|
'The first partition with this type UUID on the disk containing the root partition is '
|
|
'automatically mounted to `/home/`. If the partition is encrypted with LUKS, the device '
|
|
'mapper file will be named `/dev/mapper/home`.'),
|
|
'SRV': (
|
|
'Any native, optionally in LUKS',
|
|
'The first partition with this type UUID on the disk containing the root partition is '
|
|
'automatically mounted to `/srv/`. If the partition is encrypted with LUKS, the device '
|
|
'mapper file will be named `/dev/mapper/srv`.'),
|
|
'VAR': (
|
|
'Any native, optionally in LUKS',
|
|
'The first partition with this type UUID on the disk containing the root partition is '
|
|
'automatically mounted to `/var/` — under the condition that its partition UUID matches '
|
|
'the first 128 bits of `HMAC-SHA256(machine-id, 0x4d21b016b53445c2a9fb5c16e091fd2d)` '
|
|
'(i.e. the SHA256 HMAC hash of the binary type UUID keyed by the machine ID as read from '
|
|
'[`/etc/machine-id`](https://www.freedesktop.org/software/systemd/man/machine-id.html). '
|
|
'This special requirement is made because `/var/` (unlike the other partition types '
|
|
'listed here) is inherently private to a specific installation and cannot possibly be '
|
|
'shared between multiple OS installations on the same disk, and thus should be bound to '
|
|
'a specific instance of the OS, identified by its machine ID. If the partition is '
|
|
'encrypted with LUKS, the device mapper file will be named `/dev/mapper/var`.'),
|
|
'TMP': (
|
|
'Any native, optionally in LUKS',
|
|
'The first partition with this type UUID on the disk containing the root partition is '
|
|
'automatically mounted to `/var/tmp/`. If the partition is encrypted with LUKS, the '
|
|
'device mapper file will be named `/dev/mapper/tmp`. Note that the intended mount point '
|
|
'is indeed `/var/tmp/`, not `/tmp/`. The latter is typically maintained in memory via '
|
|
'`tmpfs` and does not require a partition on disk. In some cases it might be '
|
|
'desirable to make `/tmp/` persistent too, in which case it is recommended to make it '
|
|
'a symlink or bind mount to `/var/tmp/`, thus not requiring its own partition type UUID.'),
|
|
'USER_HOME': (
|
|
'Any native, optionally in LUKS',
|
|
'A home partition of a user, managed by '
|
|
'[`systemd-homed`](https://www.freedesktop.org/software/systemd/man/systemd-homed.html).'),
|
|
'LINUX_GENERIC': (
|
|
'Any native, optionally in LUKS',
|
|
'No automatic mounting takes place for other Linux data partitions. This partition type '
|
|
'should be used for all partitions that carry Linux file systems. The installer needs '
|
|
'to mount them explicitly via entries in `/etc/fstab`. Optionally, these partitions may '
|
|
'be encrypted with LUKS. This partition type predates the Discoverable Partitions Specification.'),
|
|
}
|
|
|
|
def extract(file):
|
|
for line in file:
|
|
# print(line)
|
|
m = re.match(r'^#define\s+SD_GPT_(.*SD_ID128_MAKE\(.*\))', line)
|
|
if not m:
|
|
continue
|
|
|
|
name = line.split()[1]
|
|
if m2 := re.match(r'^(ROOT|USR)_([A-Z0-9]+|X86_64|PPC64_LE|MIPS_LE|MIPS64_LE)(|_VERITY|_VERITY_SIG)\s+SD_ID128_MAKE\((.*)\)', m.group(1)):
|
|
ptype, arch, suffix, u = m2.groups()
|
|
u = uuid.UUID(u.replace(',', ''))
|
|
assert arch in ARCHITECTURES, f'{arch} not in f{ARCHITECTURES}'
|
|
ptype = f'{type}{suffix}'
|
|
assert ptype in TYPES
|
|
|
|
yield name, ptype, arch, u
|
|
|
|
elif m2 := re.match(r'(\w+)\s+SD_ID128_MAKE\((.*)\)', m.group(1)):
|
|
ptype, u = m2.groups()
|
|
u = uuid.UUID(u.replace(',', ''))
|
|
yield name, ptype, None, u
|
|
|
|
else:
|
|
raise ValueError(f'Failed to match: {m.group(1)}')
|
|
|
|
def generate(defines):
|
|
prevtype = None
|
|
|
|
print(HEADER, end='')
|
|
|
|
uuids = set()
|
|
|
|
for name, ptype, arch, puuid in defines:
|
|
tdesc = TYPES[ptype]
|
|
adesc = '' if arch is None else f' ({ARCHITECTURES[arch]})'
|
|
|
|
# Let's make sure that we didn't select&paste the same value twice
|
|
assert puuid not in uuids
|
|
uuids.add(puuid)
|
|
|
|
if ptype != prevtype:
|
|
prevtype = ptype
|
|
morea, moreb = DESCRIPTIONS[ptype]
|
|
else:
|
|
morea = moreb = 'ditto'
|
|
|
|
print(f'| _{tdesc}{adesc}_ | `{puuid}` `{name}` | {morea} | {moreb} |')
|
|
|
|
if __name__ == '__main__':
|
|
known = extract(sys.stdin)
|
|
generate(known)
|