Enum BlkError 

pub enum BlkError {
    NotSupported,
    Retry,
    NoMemory,
    InvalidBlockIndex(usize),
    Other(Box<dyn Error>),
}

Errors that can occur during block device operations.

These errors provide detailed information about what went wrong during block device operations and how the caller should respond.

Variants

NotSupported

The requested operation is not supported by the device.

This error occurs when attempting to perform an operation that the hardware or driver does not support. For example, trying to write to a read-only device.

Recovery: Check device capabilities and use only supported operations.

Retry

The operation should be retried later.

This error indicates that the operation failed due to temporary conditions and should be retried. This commonly occurs when:

• The device queue is full
• The device is temporarily busy
• Resource contention prevents immediate completion

Recovery: Wait a short time and retry the operation. Consider implementing exponential backoff for repeated retries.

NoMemory

Insufficient memory to complete the operation.

This error occurs when there is not enough memory available to:

• Allocate DMA buffers
• Create internal data structures
• Complete the requested operation

Recovery: Free unused resources or wait for memory to become available. Consider reducing the number of concurrent operations.

InvalidBlockIndex(usize)

The specified block index is invalid or out of range.

This error occurs when:

• The block index exceeds the device’s capacity
• The block index is negative (in languages that allow it)
• The block has been marked as bad or unusable

Recovery: Verify that the block index is within the valid range (0 to num_blocks() - 1) and that the block is accessible.

Other(Box<dyn Error>)

An unspecified error occurred.

This error wraps other error types that don’t fit into the specific categories above. The wrapped error provides additional context about what went wrong.

Recovery: Examine the wrapped error for specific recovery instructions. This often indicates a lower-level hardware or system error.

Trait Implementations

impl Debug for BlkError

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

Formats the value using the given formatter.

impl Display for BlkError

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

Formats the value using the given formatter.

impl Error for BlkError

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<BlkError> for ErrorKind

fn from(value: BlkError) -> Self

Converts to this type from the input type.

impl From<DError> for BlkError

fn from(value: DError) -> Self

Converts to this type from the input type.