| index : archinstall32 | |
| Archlinux32 installer | gitolite user |
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| -rw-r--r-- | archinstall/lib/disk/btrfs/btrfs_helpers.py | 136 |
diff --git a/archinstall/lib/disk/btrfs/btrfs_helpers.py b/archinstall/lib/disk/btrfs/btrfs_helpers.py deleted file mode 100644 index f6d2734a..00000000 --- a/archinstall/lib/disk/btrfs/btrfs_helpers.py +++ /dev/null @@ -1,136 +0,0 @@ -import logging -import re -from pathlib import Path -from typing import Optional, Dict, Any, TYPE_CHECKING - -from ...models.subvolume import Subvolume -from ...exceptions import SysCallError, DiskError -from ...general import SysCommand -from ...output import log -from ...plugins import plugins -from ..helpers import get_mount_info -from .btrfssubvolumeinfo import BtrfsSubvolumeInfo - -if TYPE_CHECKING: - from .btrfspartition import BTRFSPartition - from ...installer import Installer - - -class fstab_btrfs_compression_plugin(): - def __init__(self, partition_dict): - self.partition_dict = partition_dict - - def on_genfstab(self, installation): - with open(f"{installation.target}/etc/fstab", 'r') as fh: - fstab = fh.read() - - # Replace the {installation}/etc/fstab with entries - # using the compress=zstd where the mountpoint has compression set. - with open(f"{installation.target}/etc/fstab", 'w') as fh: - for line in fstab.split('\n'): - # So first we grab the mount options by using subvol=.*? as a locator. - # And we also grab the mountpoint for the entry, for instance /var/log - if (subvoldef := re.findall(',.*?subvol=.*?[\t ]', line)) and (mountpoint := re.findall('[\t ]/.*?[\t ]', line)): - for subvolume in self.partition_dict.get('btrfs', {}).get('subvolumes', []): - # We then locate the correct subvolume and check if it's compressed - if subvolume.compress and subvolume.mountpoint == mountpoint[0].strip(): - # We then sneak in the compress=zstd option if it doesn't already exist: - # We skip entries where compression is already defined - if ',compress=zstd,' not in line: - line = line.replace(subvoldef[0], f",compress=zstd{subvoldef[0]}") - break - - fh.write(f"{line}\n") - - return True - - -def mount_subvolume(installation: 'Installer', device: 'BTRFSPartition', subvolume: Subvolume): - # we normalize the subvolume name (getting rid of slash at the start if exists. - # In our implementation has no semantic load. - # Every subvolume is created from the top of the hierarchy- and simplifies its further use - name = subvolume.name.lstrip('/') - mountpoint = Path(subvolume.mountpoint) - installation_target = Path(installation.target) - - mountpoint = installation_target / mountpoint.relative_to(mountpoint.anchor) - mountpoint.mkdir(parents=True, exist_ok=True) - mount_options = subvolume.options + [f'subvol={name}'] - - log(f"Mounting subvolume {name} on {device} to {mountpoint}", level=logging.INFO, fg="gray") - SysCommand(f"mount {device.path} {mountpoint} -o {','.join(mount_options)}") - - -def setup_subvolumes(installation: 'Installer', partition_dict: Dict[str, Any]): - log(f"Setting up subvolumes: {partition_dict['btrfs']['subvolumes']}", level=logging.INFO, fg="gray") - - for subvolume in partition_dict['btrfs']['subvolumes']: - # we normalize the subvolume name (getting rid of slash at the start if exists. In our implementation has no semantic load. - # Every subvolume is created from the top of the hierarchy- and simplifies its further use - name = subvolume.name.lstrip('/') - - # We create the subvolume using the BTRFSPartition instance. - # That way we ensure not only easy access, but also accurate mount locations etc. - partition_dict['device_instance'].create_subvolume(name, installation=installation) - - # Make the nodatacow processing now - # It will be the main cause of creation of subvolumes which are not to be mounted - # it is not an options which can be established by subvolume (but for whole file systems), and can be - # set up via a simple attribute change in a directory (if empty). And here the directories are brand new - if subvolume.nodatacow: - if (cmd := SysCommand(f"chattr +C {installation.target}/{name}")).exit_code != 0: - raise DiskError(f"Could not set nodatacow attribute at {installation.target}/{name}: {cmd}") - - # Make the compress processing now - # it is not an options which can be established by subvolume (but for whole file systems), and can be - # set up via a simple attribute change in a directory (if empty). And here the directories are brand new - # in this way only zstd compression is activaded - # TODO WARNING it is not clear if it should be a standard feature, so it might need to be deactivated - - if subvolume.compress: - if not any(['compress' in filesystem_option for filesystem_option in partition_dict.get('filesystem', {}).get('mount_options', [])]): - if (cmd := SysCommand(f"chattr +c {installation.target}/{name}")).exit_code != 0: - raise DiskError(f"Could not set compress attribute at {installation.target}/{name}: {cmd}") - - if 'fstab_btrfs_compression_plugin' not in plugins: - plugins['fstab_btrfs_compression_plugin'] = fstab_btrfs_compression_plugin(partition_dict) - - -def subvolume_info_from_path(path: Path) -> Optional[BtrfsSubvolumeInfo]: - try: - subvolume_name = '' - result = {} - for index, line in enumerate(SysCommand(f"btrfs subvolume show {path}")): - if index == 0: - subvolume_name = line.strip().decode('UTF-8') - continue - - if b':' in line: - key, value = line.strip().decode('UTF-8').split(':', 1) - - # A bit of a hack, until I figure out how @dataclass - # allows for hooking in a pre-processor to do this we have to do it here: - result[key.lower().replace(' ', '_').replace('(s)', 's')] = value.strip() - - return BtrfsSubvolumeInfo(**{'full_path' : path, 'name' : subvolume_name, **result}) # type: ignore - except SysCallError as error: - log(f"Could not retrieve subvolume information from {path}: {error}", level=logging.WARNING, fg="orange") - - return None - - -def find_parent_subvolume(path: Path, filters=[]) -> Optional[BtrfsSubvolumeInfo]: - # A root path cannot have a parent - if str(path) == '/': - return None - - if found_mount := get_mount_info(str(path.parent), traverse=True, ignore=filters): - if not (subvolume := subvolume_info_from_path(found_mount['target'])): - if found_mount['target'] == '/': - return None - - return find_parent_subvolume(path.parent, filters=[*filters, found_mount['target']]) - - return subvolume - - return None |