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Aaru/Aaru.Filesystems/BTRFS/Info.cs

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// /***************************************************************************
// Aaru Data Preservation Suite
// ----------------------------------------------------------------------------
//
// Filename : Info.cs
// Author(s) : Natalia Portillo <claunia@claunia.com>
//
// Component : B-tree file system plugin.
//
// --[ Description ] ----------------------------------------------------------
//
// Identifies the B-tree file system and shows information.
//
// --[ License ] --------------------------------------------------------------
//
// This library is free software; you can redistribute it and/or modify
// it under the terms of the GNU Lesser General Public License as
// published by the Free Software Foundation; either version 2.1 of the
// License, or (at your option) any later version.
//
// This library is distributed in the hope that it will be useful, but
// WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
// Lesser General Public License for more details.
//
// You should have received a copy of the GNU Lesser General Public
// License along with this library; if not, see <http://www.gnu.org/licenses/>.
//
// ----------------------------------------------------------------------------
// Copyright © 2011-2025 Natalia Portillo
// ****************************************************************************/
using System;
using System.Text;
using Aaru.CommonTypes.AaruMetadata;
using Aaru.CommonTypes.Enums;
using Aaru.CommonTypes.Interfaces;
using Aaru.Helpers;
using Aaru.Logging;
using Sentry;
using Partition = Aaru.CommonTypes.Partition;
namespace Aaru.Filesystems;
/// <inheritdoc />
/// <summary>Implements detection of the b-tree filesystem (btrfs)</summary>
public sealed partial class BTRFS
{
#region IFilesystem Members
/// <inheritdoc />
public bool Identify(IMediaImage imagePlugin, Partition partition)
{
if(partition.Start >= partition.End) return false;
ulong sbSectorOff = 0x10000 / imagePlugin.Info.SectorSize;
uint sbSectorSize = 0x1000 / imagePlugin.Info.SectorSize;
if(sbSectorOff + partition.Start >= partition.End) return false;
ErrorNumber errno = imagePlugin.ReadSectors(sbSectorOff + partition.Start, sbSectorSize, out byte[] sector);
if(errno != ErrorNumber.NoError) return false;
SuperBlock btrfsSb;
try
{
btrfsSb = Marshal.ByteArrayToStructureLittleEndian<SuperBlock>(sector);
}
catch(Exception ex)
{
SentrySdk.CaptureException(ex);
return false;
}
AaruLogging.Debug(MODULE_NAME, "sbSectorOff = {0}", sbSectorOff);
AaruLogging.Debug(MODULE_NAME, "sbSectorSize = {0}", sbSectorSize);
AaruLogging.Debug(MODULE_NAME, "partition.PartitionStartSector = {0}", partition.Start);
AaruLogging.Debug(MODULE_NAME, "btrfsSb.magic = 0x{0:X16}", btrfsSb.magic);
return btrfsSb.magic == BTRFS_MAGIC;
}
/// <inheritdoc />
public void GetInformation(IMediaImage imagePlugin, Partition partition, Encoding encoding, out string information,
out FileSystem metadata)
{
var sbInformation = new StringBuilder();
metadata = new FileSystem();
information = "";
ulong sbSectorOff = 0x10000 / imagePlugin.Info.SectorSize;
uint sbSectorSize = 0x1000 / imagePlugin.Info.SectorSize;
ErrorNumber errno = imagePlugin.ReadSectors(sbSectorOff + partition.Start, sbSectorSize, out byte[] sector);
if(errno != ErrorNumber.NoError) return;
SuperBlock btrfsSb = Marshal.ByteArrayToStructureLittleEndian<SuperBlock>(sector);
AaruLogging.Debug(MODULE_NAME, "btrfsSb.checksum = {0}", btrfsSb.checksum);
AaruLogging.Debug(MODULE_NAME, "btrfsSb.uuid = {0}", btrfsSb.uuid);
AaruLogging.Debug(MODULE_NAME, "btrfsSb.pba = {0}", btrfsSb.pba);
AaruLogging.Debug(MODULE_NAME, "btrfsSb.flags = {0}", btrfsSb.flags);
AaruLogging.Debug(MODULE_NAME, "btrfsSb.magic = {0}", btrfsSb.magic);
AaruLogging.Debug(MODULE_NAME, "btrfsSb.generation = {0}", btrfsSb.generation);
AaruLogging.Debug(MODULE_NAME, "btrfsSb.root_lba = {0}", btrfsSb.root_lba);
AaruLogging.Debug(MODULE_NAME, "btrfsSb.chunk_lba = {0}", btrfsSb.chunk_lba);
AaruLogging.Debug(MODULE_NAME, "btrfsSb.log_lba = {0}", btrfsSb.log_lba);
AaruLogging.Debug(MODULE_NAME, "btrfsSb.log_root_transid = {0}", btrfsSb.log_root_transid);
AaruLogging.Debug(MODULE_NAME, "btrfsSb.total_bytes = {0}", btrfsSb.total_bytes);
AaruLogging.Debug(MODULE_NAME, "btrfsSb.bytes_used = {0}", btrfsSb.bytes_used);
AaruLogging.Debug(MODULE_NAME, "btrfsSb.root_dir_objectid = {0}", btrfsSb.root_dir_objectid);
AaruLogging.Debug(MODULE_NAME, "btrfsSb.num_devices = {0}", btrfsSb.num_devices);
AaruLogging.Debug(MODULE_NAME, "btrfsSb.sectorsize = {0}", btrfsSb.sectorsize);
AaruLogging.Debug(MODULE_NAME, "btrfsSb.nodesize = {0}", btrfsSb.nodesize);
AaruLogging.Debug(MODULE_NAME, "btrfsSb.leafsize = {0}", btrfsSb.leafsize);
AaruLogging.Debug(MODULE_NAME, "btrfsSb.stripesize = {0}", btrfsSb.stripesize);
AaruLogging.Debug(MODULE_NAME, "btrfsSb.n = {0}", btrfsSb.n);
AaruLogging.Debug(MODULE_NAME, "btrfsSb.chunk_root_generation = {0}", btrfsSb.chunk_root_generation);
AaruLogging.Debug(MODULE_NAME, "btrfsSb.compat_flags = 0x{0:X16}", btrfsSb.compat_flags);
AaruLogging.Debug(MODULE_NAME, "btrfsSb.compat_ro_flags = 0x{0:X16}", btrfsSb.compat_ro_flags);
AaruLogging.Debug(MODULE_NAME, "btrfsSb.incompat_flags = 0x{0:X16}", btrfsSb.incompat_flags);
AaruLogging.Debug(MODULE_NAME, "btrfsSb.csum_type = {0}", btrfsSb.csum_type);
AaruLogging.Debug(MODULE_NAME, "btrfsSb.root_level = {0}", btrfsSb.root_level);
AaruLogging.Debug(MODULE_NAME, "btrfsSb.chunk_root_level = {0}", btrfsSb.chunk_root_level);
AaruLogging.Debug(MODULE_NAME, "btrfsSb.log_root_level = {0}", btrfsSb.log_root_level);
AaruLogging.Debug(MODULE_NAME, "btrfsSb.dev_item.id = 0x{0:X16}", btrfsSb.dev_item.id);
AaruLogging.Debug(MODULE_NAME, "btrfsSb.dev_item.bytes = {0}", btrfsSb.dev_item.bytes);
AaruLogging.Debug(MODULE_NAME, "btrfsSb.dev_item.used = {0}", btrfsSb.dev_item.used);
AaruLogging.Debug(MODULE_NAME, "btrfsSb.dev_item.optimal_align = {0}", btrfsSb.dev_item.optimal_align);
AaruLogging.Debug(MODULE_NAME, "btrfsSb.dev_item.optimal_width = {0}", btrfsSb.dev_item.optimal_width);
AaruLogging.Debug(MODULE_NAME, "btrfsSb.dev_item.minimal_size = {0}", btrfsSb.dev_item.minimal_size);
AaruLogging.Debug(MODULE_NAME, "btrfsSb.dev_item.type = {0}", btrfsSb.dev_item.type);
AaruLogging.Debug(MODULE_NAME, "btrfsSb.dev_item.generation = {0}", btrfsSb.dev_item.generation);
AaruLogging.Debug(MODULE_NAME, "btrfsSb.dev_item.start_offset = {0}", btrfsSb.dev_item.start_offset);
AaruLogging.Debug(MODULE_NAME, "btrfsSb.dev_item.dev_group = {0}", btrfsSb.dev_item.dev_group);
AaruLogging.Debug(MODULE_NAME, "btrfsSb.dev_item.seek_speed = {0}", btrfsSb.dev_item.seek_speed);
AaruLogging.Debug(MODULE_NAME, "btrfsSb.dev_item.bandwidth = {0}", btrfsSb.dev_item.bandwidth);
AaruLogging.Debug(MODULE_NAME, "btrfsSb.dev_item.device_uuid = {0}", btrfsSb.dev_item.device_uuid);
AaruLogging.Debug(MODULE_NAME, "btrfsSb.dev_item.uuid = {0}", btrfsSb.dev_item.uuid);
AaruLogging.Debug(MODULE_NAME, "btrfsSb.label = {0}", btrfsSb.label);
sbInformation.AppendLine(Localization.B_tree_filesystem);
sbInformation.AppendFormat(Localization.UUID_0, btrfsSb.uuid).AppendLine();
sbInformation.AppendFormat(Localization.This_superblock_resides_on_physical_block_0, btrfsSb.pba).AppendLine();
sbInformation.AppendFormat(Localization.Root_tree_starts_at_LBA_0, btrfsSb.root_lba).AppendLine();
sbInformation.AppendFormat(Localization.Chunk_tree_starts_at_LBA_0, btrfsSb.chunk_lba).AppendLine();
sbInformation.AppendFormat(Localization.Log_tree_starts_at_LBA_0, btrfsSb.log_lba).AppendLine();
sbInformation.AppendFormat(Localization.Volume_has_0_bytes_spanned_in_1_devices,
btrfsSb.total_bytes,
btrfsSb.num_devices)
.AppendLine();
sbInformation.AppendFormat(Localization.Volume_has_0_bytes_used, btrfsSb.bytes_used).AppendLine();
sbInformation.AppendFormat(Localization._0_bytes_sector, btrfsSb.sectorsize).AppendLine();
sbInformation.AppendFormat(Localization._0_bytes_node, btrfsSb.nodesize).AppendLine();
sbInformation.AppendFormat(Localization._0_bytes_leaf, btrfsSb.leafsize).AppendLine();
sbInformation.AppendFormat(Localization._0_bytes_stripe, btrfsSb.stripesize).AppendLine();
sbInformation.AppendFormat(Localization.Flags_0, btrfsSb.flags).AppendLine();
sbInformation.AppendFormat(Localization.Compatible_flags_0, btrfsSb.compat_flags).AppendLine();
sbInformation.AppendFormat(Localization.Read_only_compatible_flags_0, btrfsSb.compat_ro_flags).AppendLine();
sbInformation.AppendFormat(Localization.Incompatible_flags_0, btrfsSb.incompat_flags).AppendLine();
sbInformation.AppendFormat(Localization.Device_UUID_0, btrfsSb.dev_item.uuid).AppendLine();
sbInformation.AppendFormat(Localization.Volume_label_0, btrfsSb.label).AppendLine();
information = sbInformation.ToString();
metadata = new FileSystem
{
Clusters = btrfsSb.total_bytes / btrfsSb.sectorsize,
ClusterSize = btrfsSb.sectorsize,
VolumeName = btrfsSb.label,
VolumeSerial = $"{btrfsSb.uuid}",
VolumeSetIdentifier = $"{btrfsSb.dev_item.device_uuid}",
Type = FS_TYPE
};
metadata.FreeClusters = metadata.Clusters - btrfsSb.bytes_used / btrfsSb.sectorsize;
}
#endregion
}
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