Enum Error 

pub enum Error {
    CopyFailed(Errno),
    PartiallyCopied(usize),
    IncompleteMsg {
        read: usize,
        expected: usize,
    },
    SystemError(Error),
    ReadEof,
    UnrecognizedEvent(u8),
    UnsupportedIoctls(IoctlFlags),
    ZeropageFailed(Errno),
    OpenDevUserfaultfd(Error),
}

Errors for this crate.

Several of these errors contain an underlying Errno value; see userfaultfd(2) and ioctl_userfaultfd(2) for more details on how to interpret these errors.

Variants

CopyFailed(Errno)

Copy ioctl failure with errno value.

PartiallyCopied(usize)

Copy ioctl failure with copied length.

IncompleteMsg

Failure to read a full uffd_msg struct from the underlying file descriptor.

Fields

read: usize

expected: usize

SystemError(Error)

Generic system error.

ReadEof

End-of-file was read from the underlying file descriptor.

UnrecognizedEvent(u8)

An unrecognized event code was found in a uffd_msg struct.

UnsupportedIoctls(IoctlFlags)

Requested ioctls were not available when initializing the API.

ZeropageFailed(Errno)

Zeropage ioctl failure with errno value.

OpenDevUserfaultfd(Error)

Could not open /dev/userfaultfd even though it exists

Trait Implementations

impl Debug for Error

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

Formats the value using the given formatter.

impl Display for Error

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

Formats the value using the given formatter.

impl Error for Error

fn source(&self) -> Option<&(dyn Error + 'static)>

Returns the lower-level source of this error, if any.

fn description(&self) -> &str

👎Deprecated since 1.42.0:

use the Display impl or to_string()

fn cause(&self) -> Option<&dyn Error>

👎Deprecated since 1.33.0:

replaced by Error::source, which can support downcasting

fn provide<'a>(&'a self, request: &mut Request<'a>)

🔬This is a nightly-only experimental API. (error_generic_member_access)

Provides type-based access to context intended for error reports.

impl From<Errno> for Error

fn from(e: Error) -> Error

Converts to this type from the input type.