Struct OverlayProvider

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pub struct OverlayProvider;

Expand description

Overlayfs provider — near-instant CoW mounts (Linux only).

Layout:

cache_dir/           ← lower (read-only, shared across boxes)
box_dir/upper/       ← upper (per-box writes)
box_dir/work/        ← overlayfs workdir
box_dir/merged/      ← merged view → InstanceSpec.rootfs_path

Trait Implementations§

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impl RootfsProvider for OverlayProvider

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fn prepare(&self, box_dir: &Path, cache_dir: &Path) -> Result<PathBuf>

Prepare a rootfs at box_dir from the cached read-only layer at cache_dir. Returns the path to use as InstanceSpec.rootfs_path.

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fn cleanup(&self, box_dir: &Path, persistent: bool) -> Result<()>

Cleanup after box stops. Read more

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fn name(&self) -> &'static str

Human-readable name for logging.

Auto Trait Implementations§

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impl UnwindSafe for OverlayProvider

Blanket Implementations§

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

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fn type_id(&self) -> TypeId

Gets the TypeId of self. Read more

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impl<'a, T, E> AsTaggedExplicit<'a, E> for T
where T: 'a,

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fn explicit(self, class: Class, tag: u32) -> TaggedParser<'a, Explicit, Self, E>

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impl<'a, T, E> AsTaggedImplicit<'a, E> for T
where T: 'a,

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fn implicit( self, class: Class, constructed: bool, tag: u32, ) -> TaggedParser<'a, Implicit, Self, E>

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impl<T> Borrow<T> for T
where T: ?Sized,

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fn borrow(&self) -> &T

Immutably borrows from an owned value. Read more

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impl<T> BorrowMut<T> for T
where T: ?Sized,

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fn borrow_mut(&mut self) -> &mut T

Mutably borrows from an owned value. Read more

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impl<T> From<T> for T

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fn from(t: T) -> T

Returns the argument unchanged.

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impl<T> Instrument for T

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fn instrument(self, span: Span) -> Instrumented<Self>

Instruments this type with the provided Span, returning an Instrumented wrapper. Read more

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fn in_current_span(self) -> Instrumented<Self>

Instruments this type with the current Span, returning an Instrumented wrapper. Read more

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impl<T, U> Into for T
where U: From<T>,

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fn into(self) -> U

Calls U::from(self).

That is, this conversion is whatever the implementation of From<T> for U chooses to do.

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impl<T> IntoEither for T

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fn into_either(self, into_left: bool) -> Either<Self, Self>

Converts self into a Left variant of Either<Self, Self> if into_left is true. Converts self into a Right variant of Either<Self, Self> otherwise. Read more

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fn into_either_with<F>(self, into_left: F) -> Either<Self, Self>
where F: FnOnce(&Self) -> bool,

Converts self into a Left variant of Either<Self, Self> if into_left(&self) returns true. Converts self into a Right variant of Either<Self, Self> otherwise. Read more

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