public bool Identify(IMediaImage imagePlugin, Partition partition)
{
uint bootSectors = JFS_BOOT_BLOCKS_SIZE / imagePlugin.Info.SectorSize;
if (partition.Start + bootSectors >= partition.End)
{
return(false);
}
byte[] sector = imagePlugin.ReadSector(partition.Start + bootSectors);
if (sector.Length < 512)
{
return(false);
}
JfsSuperBlock jfsSb = Marshal.ByteArrayToStructureLittleEndian <JfsSuperBlock>(sector);
return(jfsSb.s_magic == JFS_MAGIC);
}
public bool Identify(IMediaImage imagePlugin, Partition partition)
{
uint bootSectors = JFS_BOOT_BLOCKS_SIZE / imagePlugin.Info.SectorSize;
if (partition.Start + bootSectors >= partition.End)
{
return(false);
}
byte[] sector = imagePlugin.ReadSector(partition.Start + bootSectors);
if (sector.Length < 512)
{
return(false);
}
JfsSuperBlock jfsSb = new JfsSuperBlock();
IntPtr sbPtr = Marshal.AllocHGlobal(Marshal.SizeOf(jfsSb));
Marshal.Copy(sector, 0, sbPtr, Marshal.SizeOf(jfsSb));
jfsSb = (JfsSuperBlock)Marshal.PtrToStructure(sbPtr, typeof(JfsSuperBlock));
Marshal.FreeHGlobal(sbPtr);
return(jfsSb.s_magic == JFS_MAGIC);
}
public void GetInformation(IMediaImage imagePlugin, Partition partition, out string information,
Encoding encoding)
{
Encoding = encoding ?? Encoding.GetEncoding("iso-8859-15");
information = "";
var sb = new StringBuilder();
uint bootSectors = JFS_BOOT_BLOCKS_SIZE / imagePlugin.Info.SectorSize;
byte[] sector = imagePlugin.ReadSector(partition.Start + bootSectors);
if (sector.Length < 512)
{
return;
}
JfsSuperBlock jfsSb = Marshal.ByteArrayToStructureLittleEndian <JfsSuperBlock>(sector);
sb.AppendLine("JFS filesystem");
sb.AppendFormat("Version {0}", jfsSb.s_version).AppendLine();
sb.AppendFormat("{0} blocks of {1} bytes", jfsSb.s_size, jfsSb.s_bsize).AppendLine();
sb.AppendFormat("{0} blocks per allocation group", jfsSb.s_agsize).AppendLine();
if (jfsSb.s_flags.HasFlag(JfsFlags.Unicode))
{
sb.AppendLine("Volume uses Unicode for directory entries");
}
if (jfsSb.s_flags.HasFlag(JfsFlags.RemountRO))
{
sb.AppendLine("Volume remounts read-only on error");
}
if (jfsSb.s_flags.HasFlag(JfsFlags.Continue))
{
sb.AppendLine("Volume continues on error");
}
if (jfsSb.s_flags.HasFlag(JfsFlags.Panic))
{
sb.AppendLine("Volume panics on error");
}
if (jfsSb.s_flags.HasFlag(JfsFlags.UserQuota))
{
sb.AppendLine("Volume has user quotas enabled");
}
if (jfsSb.s_flags.HasFlag(JfsFlags.GroupQuota))
{
sb.AppendLine("Volume has group quotas enabled");
}
if (jfsSb.s_flags.HasFlag(JfsFlags.NoJournal))
{
sb.AppendLine("Volume is not using any journal");
}
if (jfsSb.s_flags.HasFlag(JfsFlags.Discard))
{
sb.AppendLine("Volume sends TRIM/UNMAP commands to underlying device");
}
if (jfsSb.s_flags.HasFlag(JfsFlags.GroupCommit))
{
sb.AppendLine("Volume commits in groups of 1");
}
if (jfsSb.s_flags.HasFlag(JfsFlags.LazyCommit))
{
sb.AppendLine("Volume commits lazy");
}
if (jfsSb.s_flags.HasFlag(JfsFlags.Temporary))
{
sb.AppendLine("Volume does not commit to log");
}
if (jfsSb.s_flags.HasFlag(JfsFlags.InlineLog))
{
sb.AppendLine("Volume has log withing itself");
}
if (jfsSb.s_flags.HasFlag(JfsFlags.InlineMoving))
{
sb.AppendLine("Volume has log withing itself and is moving it out");
}
if (jfsSb.s_flags.HasFlag(JfsFlags.BadSAIT))
{
sb.AppendLine("Volume has bad current secondary ait");
}
if (jfsSb.s_flags.HasFlag(JfsFlags.Sparse))
{
sb.AppendLine("Volume supports sparse files");
}
if (jfsSb.s_flags.HasFlag(JfsFlags.DASDEnabled))
{
sb.AppendLine("Volume has DASD limits enabled");
}
if (jfsSb.s_flags.HasFlag(JfsFlags.DASDPrime))
{
sb.AppendLine("Volume primes DASD on boot");
}
if (jfsSb.s_flags.HasFlag(JfsFlags.SwapBytes))
{
sb.AppendLine("Volume is in a big-endian system");
}
if (jfsSb.s_flags.HasFlag(JfsFlags.DirIndex))
{
sb.AppendLine("Volume has presistent indexes");
}
if (jfsSb.s_flags.HasFlag(JfsFlags.Linux))
{
sb.AppendLine("Volume supports Linux");
}
if (jfsSb.s_flags.HasFlag(JfsFlags.DFS))
{
sb.AppendLine("Volume supports DCE DFS LFS");
}
if (jfsSb.s_flags.HasFlag(JfsFlags.OS2))
{
sb.AppendLine("Volume supports OS/2, and is case insensitive");
}
if (jfsSb.s_flags.HasFlag(JfsFlags.AIX))
{
sb.AppendLine("Volume supports AIX");
}
if (jfsSb.s_state != 0)
{
sb.AppendLine("Volume is dirty");
}
sb.AppendFormat("Volume was last updated on {0}",
DateHandlers.UnixUnsignedToDateTime(jfsSb.s_time.tv_sec, jfsSb.s_time.tv_nsec)).
AppendLine();
if (jfsSb.s_version == 1)
{
sb.AppendFormat("Volume name: {0}", StringHandlers.CToString(jfsSb.s_fpack, Encoding)).AppendLine();
}
else
{
sb.AppendFormat("Volume name: {0}", StringHandlers.CToString(jfsSb.s_label, Encoding)).AppendLine();
}
sb.AppendFormat("Volume UUID: {0}", jfsSb.s_uuid).AppendLine();
XmlFsType = new FileSystemType
{
Type = "JFS filesystem", Clusters = jfsSb.s_size, ClusterSize = jfsSb.s_bsize,
Bootable = true,
VolumeName =
StringHandlers.CToString(jfsSb.s_version == 1 ? jfsSb.s_fpack : jfsSb.s_label, Encoding),
VolumeSerial = $"{jfsSb.s_uuid}",
ModificationDate =
DateHandlers.UnixUnsignedToDateTime(jfsSb.s_time.tv_sec, jfsSb.s_time.tv_nsec),
ModificationDateSpecified = true
};
if (jfsSb.s_state != 0)
{
XmlFsType.Dirty = true;
}
information = sb.ToString();
}
