ext4_read_only::structs

Enum FeatureIncompat

#[repr(u32)]pub enum FeatureIncompat {
Show 15 variants    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,
}

Expand description

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

Tests for self and other values to be equal, and is used by ==.

1.0.0 · Source§

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

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

impl StructuralPartialEq for FeatureIncompat

Auto Trait Implementations§

impl Freeze for FeatureIncompat

impl RefUnwindSafe for FeatureIncompat

impl Send for FeatureIncompat

impl Sync for FeatureIncompat

impl Unpin for FeatureIncompat

impl UnwindSafe for FeatureIncompat

Blanket Implementations§

impl<T> Any for T
where T: 'static + ?Sized,

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