Enum ext4_read_only::structs::FeatureIncompat

#[repr(u32)]
pub enum FeatureIncompat {
    Compression = 1,
    EntryHasFileType = 2,
    HasJournal = 4,
    JournalSeparate = 8,
    MetaBlockGroups = 16,
    Extents = 64,
    Is64Bit = 128,
    MultiMountProtection = 256,
    FlexibleBlockGroups = 512,
    ExtendedAttributeINodes = 1_024,
    ExtendedDirectoryEntry = 4_096,
    MetadataChecksum = 8_192,
    LargeDirectory = 16_384,
    SmallFilesInINode = 32_768,
    EncryptedINodes = 65_536,
}

Feature Incompatible flags.

Stored in SuperBlock::e2fs_features_incompat.

All flags listed by a given filesystem must be supported by us in order for us to attempt mounting it.

With our limited support at the time, there are also flags that we require to exist, like EntryHasFileType.

Variants

Compression = 1

EntryHasFileType = 2

Currently required flag.

HasJournal = 4

We do not support journaling, but assuming an empty journal, we can still read.

Run fsck in Linux to repair the filesystem first before attempting to mount a journaled ext4 image.

JournalSeparate = 8

MetaBlockGroups = 16

Extents = 64

Required flag. Lack of this flag means the filesystem is not ext4, and we are not backward compatible.

Is64Bit = 128

MultiMountProtection = 256

FlexibleBlockGroups = 512

No explicit support, we will permit the flag as it works for our needs.

ExtendedAttributeINodes = 1_024

ExtendedDirectoryEntry = 4_096

MetadataChecksum = 8_192

We do not calculate checksums, so this is permitted but not actionable.

LargeDirectory = 16_384

SmallFilesInINode = 32_768

EncryptedINodes = 65_536

Trait Implementations

impl PartialEq for FeatureIncompat

fn eq(&self, other: &FeatureIncompat) -> bool

This method tests for self and other values to be equal, and is used by ==.

fn ne(&self, other: &Rhs) -> bool

This method tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.

impl StructuralPartialEq for FeatureIncompat