Enum userfaultfd::Error

pub enum Error {
    CopyFailed(Errno),
    IncompleteMsg {
        read: usize,
        expected: usize,
    },
    SystemError(Error),
    ReadEof,
    UnrecognizedEvent(u8),
    UnrecognizedIoctls(u64),
    UnsupportedIoctls(IoctlFlags),
    ZeropageFailed(Errno),
}

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.

IncompleteMsg

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

Fields of IncompleteMsg

read: usizeexpected: 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.

UnrecognizedIoctls(u64)

An unrecognized ioctl bit was set in the result of API initialization or registration.

UnsupportedIoctls(IoctlFlags)

Requested ioctls were not available when initializing the API.

ZeropageFailed(Errno)

Zeropage ioctl failure with errno value.

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)>

The lower-level source of this error, if any.

pub fn backtrace(&self) -> Option<&Backtrace>

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

Returns a stack backtrace, if available, of where this error occurred.

pub fn description(&self) -> &str

👎 Deprecated since 1.42.0:

use the Display impl or to_string()

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

👎 Deprecated since 1.33.0:

replaced by Error::source, which can support downcasting

impl From<Error> for Error

fn from(e: Error) -> Error

Performs the conversion.