Struct Overlay

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pub struct Overlay { /* private fields */ }
Expand description

An overlay mount point

This requires linux kernel of at least 3.18.

To use overlayfs in user namespace you need a kernel patch (which is enabled by default in ubuntu). At least this is still true for mainline kernel 4.5.0.

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impl Overlay

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pub fn readonly<'x, I, T>(dirs: I, target: T) -> Overlay
where I: Iterator<Item = &'x Path>, T: AsRef<Path>,

A constructor for read-only overlayfs mount

You must have at least two directories in the list (for single dir it might be equal to bind mount, but kernel return EINVAL for such options).

The top-most directory will be first in the list.

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pub fn writable<'x, I, B, C, D>( lowerdirs: I, upperdir: B, workdir: C, target: D, ) -> Overlay
where I: Iterator<Item = &'x Path>, B: AsRef<Path>, C: AsRef<Path>, D: AsRef<Path>,

A constructor for writable overlayfs mount

The upperdir and workdir must be on the same filesystem.

The top-most directory will be first in the list of lowerdirs.

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pub fn bare_mount(self) -> Result<(), OSError>

Execute an overlay mount

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pub fn mount(self) -> Result<(), Error>

Execute an overlay mount and explain the error immediately

Trait Implementations§

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impl Clone for Overlay

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fn clone(&self) -> Overlay

Returns a copy of the value. Read more
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fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source. Read more
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impl Debug for Overlay

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fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter. Read more
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impl Display for Overlay

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fn fmt(&self, fmt: &mut Formatter<'_>) -> Result

Formats the value using the given formatter. Read more

Auto Trait Implementations§

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<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> CloneToUninit for T
where T: Clone,

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unsafe fn clone_to_uninit(&self, dest: *mut u8)

🔬This is a nightly-only experimental API. (clone_to_uninit)
Performs copy-assignment from self to dest. 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, U> Into<U> 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> ToOwned for T
where T: Clone,

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type Owned = T

The resulting type after obtaining ownership.
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fn to_owned(&self) -> T

Creates owned data from borrowed data, usually by cloning. Read more
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fn clone_into(&self, target: &mut T)

Uses borrowed data to replace owned data, usually by cloning. Read more
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impl<T> ToString for T
where T: Display + ?Sized,

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fn to_string(&self) -> String

Converts the given value to a String. Read more
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impl<T, U> TryFrom<U> for T
where U: Into<T>,

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type Error = Infallible

The type returned in the event of a conversion error.
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fn try_from(value: U) -> Result<T, <T as TryFrom<U>>::Error>

Performs the conversion.
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impl<T, U> TryInto<U> for T
where U: TryFrom<T>,

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type Error = <U as TryFrom<T>>::Error

The type returned in the event of a conversion error.
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fn try_into(self) -> Result<U, <U as TryFrom<T>>::Error>

Performs the conversion.